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1. Emerging topics in nanophononics and elastic, acoustic, and mechanical metamaterials: An overview

Author

Anastasiia O. Krushynska, Daniel Torrent, Alejandro M. Aragón, Raffaele Ardito, Osama R. Bilal, Bernard Bonello, Federico Bosia, Yi Chen, Johan Christensen, Andrea Colombi, Steven A. Cummer, Bahram Djafari-Rouhani, Fernando Fraternali, Pavel I. Galich, Pedro David Garcia, Jean-Philippe Groby, Vincent Tournat, Sebastien Guenneau, Michael R. Haberman, Mahmoud I. Hussein, Shahram Janbaz, Noé Jiménez, Abdelkrim Khelif, Vincent Laude, MohammadJ.Mirzaali, Pawel Packo, Antonio Palermo, Yan Pennec, Rubén Picó, María Rosendo López, Stephan Rudykh, Marc Serra-Garcia, Clivia M. Sotomayor Torres, Timothy A. Starkey, Oliver B. Wright, University of Groningen [Groningen], Universitat Jaume I, University of Connecticut (UCONN), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Politecnico di Torino = Polytechnic of Turin (Polito), Department of Applied Science and Technology [Politecnico di Torino] (DISAT), Institute of geographical sciences and natural resources research [CAS] (IGSNRR), Chinese Academy of Sciences [Beijing] (CAS), Universidad Carlos III de Madrid [Madrid] (UC3M), Institute of Structural Engineering [ETH Zürich] (IBK), Department of Civil, Environmental and Geomatic Engineering [ETH Zürich] (D-BAUG), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Department of Electrical and Computer Engineering [Durham] (ECE), Duke University [Durham], Physique - IEMN (PHYSIQUE - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), University of Salerno (UNISA), Abraham de Moivre, Imperial College London-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), This work is supported by the DYNAMO project (101046489) funded by the European Union. this publication is part of the project PID2021-124814NB-C22, funded by MCIN/AEI/10.13039/501100011033/ 'FEDER A way of making Europe'., University of Connecticut [UCONN], Institut des Nanosciences de Paris [INSP], Politecnico di Torino = Polytechnic of Turin [Polito], Department of Applied Science and Technology [Politecnico di Torino] [DISAT], Institute of geographical sciences and natural resources research [CAS] [IGSNRR], Universidad Carlos III de Madrid [Madrid] [UC3M], Institute of Structural Engineering [ETH Zürich] [IBK], Department of Electrical and Computer Engineering [Durham] [ECE], Physique - IEMN [PHYSIQUE - IEMN], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], University of Salerno [UNISA], Laboratoire d'Acoustique de l'Université du Mans [LAUM], Commissariat à l'énergie atomique et aux énergies alternatives [CEA], Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) [FEMTO-ST], Computational Mechanical and Materials Engineering, Krushynska A.O., Torrent D., Aragon A.M., Ardito R., Bilal O.R., Bonello B., Bosia F., Chen Y., Christensen J., Colombi A., Cummer S.A., Djafari-Rouhani B., Fraternali F., Galich P.I., Garcia P.D., Groby J.-P., Guenneau S., Haberman M.R., Hussein M.I., Janbaz S., Jimenez N., Khelif A., Laude V., Mirzaali M.J., Packo P., Palermo A., Pennec Y., Pico R., Lopez M.R., Rudykh S., Serra-Garcia M., Sotomayor Torres C.M., Starkey T.A., Tournat V., and Wright O.B.

Subjects
[PHYS]Physics [physics], Technology, metamaterial, EUROMECH, optomechanic, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, optomechanics, acoustic, mechanic, [SPI]Engineering Sciences [physics], metamaterials, Electrical and Electronic Engineering, acoustics, wave dynamics, ddc:600, nanophononics, additive manufacturing, mechanics, Biotechnology
Abstract

This broad review summarizes recent advances and "hot"research topics in nanophononics and elastic, acoustic, and mechanical metamaterials based on results presented by the authors at the EUROMECH 610 Colloquium held on April 25-27, 2022 in Benicássim, Spain. The key goal of the colloquium was to highlight important developments in these areas, particularly new results that emerged during the last two years. This work thus presents a "snapshot"of the state-of-the-art of different nanophononics- and metamaterial-related topics rather than a historical view on these subjects, in contrast to a conventional review article. The introduction of basic definitions for each topic is followed by an outline of design strategies for the media under consideration, recently developed analysis and implementation techniques, and discussions of current challenges and promising applications. This review, while not comprehensive, will be helpful especially for early-career researchers, among others, as it offers a broad view of the current state-of-the-art and highlights some unique and flourishing research in the mentioned fields, providing insight into multiple exciting research directions., Nanophotonics, 12 (4), ISSN:2192-8614

Published
2023

2. Nonlinear coda wave interferometry for the global evaluation of damage levels in complex solids

Author

Alain Le Duff, Stéphane Letourneur, Vincent Tournat, Odile Abraham, Yuxiang Zhang, Olivier Durand, Bertrand Lascoup, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Département Mesure, Auscultation et Calcul Scientifique (IFSTTAR/MACS), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), ESEO - Groupe Radio et Hyperfréquences, ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), IRT Jules Vernes, Laboratoire Géophysique et évaluation non destructive (IFSTTAR/GERS/GeoEND), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Géophysique et évaluation non destructive ( IFSTTAR/GERS/GeoEND ), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM )

Subjects
INTERFEROMETRIE, Acoustics and Ultrasonics, Acoustics, Coda wave interferometry, 01 natural sciences, Coda, [SPI]Engineering Sciences [physics], Nonlinear acoustics, Nonlinear wave modulation, 0103 physical sciences, [ SPI ] Engineering Sciences [physics], [ SPI.GCIV ] Engineering Sciences [physics]/Civil Engineering, 010301 acoustics, ONDE, Parametric statistics, 010302 applied physics, Physics, Scattering, ULTRASON, ONDE SISMIQUE, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, Interferometry, Nonlinear system, ACOUSTIQUE, Ultrasonic sensor, Nonlinear scattering, Global evaluation of damage level
Abstract

A nonlinear acoustic method to assess the damage level of a complex medium is discussed herein. Thanks to the highly nonlinear elastic signatures of cracks or, more generally, internal solid contacts, this method is able to distinguish between contributions from linear wave scattering by a heterogeneity and contributions from nonlinear scattering by a crack or unbounded interface. The coda wave interferometry (CWI) technique is applied to reverberated and scattered waves in glass plate samples featuring various levels of damage. The ultrasonic coda signals are recorded in both the absence and presence of an independent and lower-frequency elastic “pump” wave, before being analyzed by CWI. The monitored CWI parameters quantifying changes in these coda signals, which therefore quantify the nonlinear wave-mixing effects between the coda and pump waves, are found to be dependent on the damage level in the sample. A parametric study is also performed to analyze the influence of sensor positions and average temperature on the method’s output. The reported results could be applied to the non-destructive testing and evaluation of complex-shape materials and multiple scattering samples, for which conventional ultrasonic methods show strong limitations.

Published
2017

3. Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

Author

Didier Laux, Stéphane Pagano, E. Le Clezio, T. Delaunay, R. Longo, Olivier Arnould, ESEO-GSII (GSII), ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Matériaux, MicroCapteurs et Acoustique (M2A), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique et Génie Civil (LMGC), Mathématiques et Modélisations en Mécanique (M3), Bois (BOIS), ESEO-GSII ( GSII ), PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d’Electronique et des Systèmes ( IES ), Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Mécanique et Génie Civil ( LMGC ), Mathématiques et Modélisations en Mécanique ( M3 ), Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Bois ( BOIS ), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, Materials science, Acoustics, Inverse, Plant Science, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 01 natural sciences, Industrial and Manufacturing Engineering, symbols.namesake, Normal mode, 010608 biotechnology, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], General Materials Science, Stiffness matrix, 040101 forestry, Resonant ultrasound spectroscopy, [SPI.MECA.VIBR]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Vibrations [physics.class-ph], Forestry, 04 agricultural and veterinary sciences, Inverse problem, [ SPI.MECA.VIBR ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Vibrations [physics.class-ph], Vibration, [ SPI.MECA.MEMA ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], symbols, 0401 agriculture, forestry, and fisheries, Doppler effect, Laser Doppler vibrometer, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; The main principle of Resonant Ultrasound Spectroscopy (RUS) measurement method is to excite a sample and to deduce its elastic constants from its free mechanical resonant frequencies. The goal of this paper is to propose an application of RUS in the case of wood cubic samples by: (1) using frequencies and mode shapes (or vibration patterns) of the free resonant modes in an iterative numerical procedure to solve the inverse problem for identifying components of the stiffness tensor of the sample’s material, (2) finding the limits and optimizing the robustness of the identification procedure in the case of wood and (3) applying it to a large density range of wood samples. Specific continuous waves have been used as excitation signal in order to experimentally determine the free resonant frequencies and mode shapes of the sample in a faster way by means of Scanning Doppler Vibrometer measurements. Afterward, the stiffness tensor was derived by solving iteratively an inverse problem. The gain of using the mode shapes in the inverse identification procedure is demonstrated to be particularly necessary for wood, especially for pairing each measured frequency with its corresponding theoretically predicted one, as viscoelastic damping causes the resonant peaks to overlap and/or disappear. A sensitivity analysis of each elastic constant on the measured resonant frequencies has thus been performed. It shows that, in its current state of development, not all of the elastic constants can be identified robustly and a modified identification procedure is thus proposed. This modified procedure has been applied successfully to wood samples with a large density range, including softwood and hardwood, and particularly non-homogeneous wood species or with specific anatomical features.

Published
2018

4. Control strategy to limit duty cycle impact of earthquakes on the LIGO gravitational-wave detectors

Author

N. Mukund, A. Pele, Pascal Picart, H. Radkins, M. W. Coughlin, Jan Harms, J. Warner, C. C. Buchanan, Charles Pezerat, B. Lantz, H. A. G. Gabbard, S. Biscans, T. Shaffer, Matthew Evans, R. Mittleman, LIGO MIT, Massachusetts Institute of Technology (MIT)-California Institute of Technology (CALTECH), LIGO Hanford, Department of Physics & Astronomy [Louisiana State University] (LSU), Louisiana State University (LSU), Department of Physics [Harvard University], Harvard University [Cambridge], Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft, Università degli Studi di Urbino 'Carlo Bo', Stanford University, Inter-University Centre for Astronomy and Astrophysics [Pune] (IUCAA), LIGO Livingston, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), LIGO (Observatory : Massachusetts Institute of Technology), Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), FOS: Physical sciences, 01 natural sciences, Physics::Geophysics, General Relativity and Quantum Cosmology, 0103 physical sciences, Astronomical interferometer, laser: interferometer, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Aerospace engineering, LIGO, 010306 general physics, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics, Downtime, 010308 nuclear & particles physics, Gravitational wave, business.industry, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, gravitational radiation, Instrumentation and Detectors (physics.ins-det), Process automation system, gravitational radiation detector, detector: sensitivity, Interferometry, space-time, 13. Climate action, Duty cycle, business
Abstract

Advanced gravitational-wave detectors such as the Laser Interferometer Gravitational-Wave Observatories (LIGO) require an unprecedented level of isolation from the ground. When in operation, they are expected to observe changes in the space-time continuum of less than one thousandth of the diameter of a proton. Strong teleseismic events like earthquakes disrupt the proper functioning of the detectors, and result in a loss of data until the detectors can be returned to their operating states. An earthquake early-warning system, as well as a prediction model have been developed to help understand the impact of earthquakes on LIGO. This paper describes a control strategy to use this early-warning system to reduce the LIGO downtime by 30%. It also presents a plan to implement this new earthquake configuration in the LIGO automation system.

Published
2018

5. Laser-doppler Acoustic Probing of Granular Media with Varying Water Levels

Author

Vincent Tournat, Roger Guérin, Régis Mourgues, Sylvain Pasquet, Ludovic Bodet, Fayçal Rejiba, Quentin Vitale, Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols ( METIS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
[PHYS]Physics [physics], Granular materials, Hydrogeology, [ PHYS ] Physics [physics], Acoustics, Seismic modelling, Hydrogeophysics, Laser Doppler velocimetry, Physics and Astronomy(all), Granular material, Analogue modelling, Amplitude, Water saturation, Benchmark (computing), Ultrasonic sensor, Laser-Doppler experiments, Dispersion (water waves), Geology
Abstract

International audience; Laboratory physical modelling and non-contacting ultrasonic techniques are frequently proposed to tackle theoretical and method- ological issues related to geophysical prospecting. We used an innovative experimental set-up to perform laser-Doppler acoustic probing of granular materials with varying water levels to target near-surface hydrogeological applications. The preliminary results presented here show a clear influence of the water level on both first arrival times and dispersion of guided waves, and significant differences in terms of amplitudes. They validate the use of such approach to benchmark recently developed methods for water saturation detection in hydrogeophysics.

Published
2015
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6. Complex dispersion relation of surface acoustic waves at a lossy metasurface

Author

Jean-Philippe Groby, Alan Geslain, Vicente Romero-García, Logan Schwan, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Département de Recherche en Ingénierie des Véhicules pour l'Environnement [Nevers] (DRIVE), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Département de Recherche en Ingéniérie des Véhicules pour l'Environnement ( DRIVE ), Université de Bourgogne ( UB ), Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 (IEMN), Ecole Centrale de Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Département de Recherche en Ingéniérie des Véhicules pour l'Environnement (DRIVE), and Université de Bourgogne (UB)

Subjects
Integral transforms, Plasmons, Physics and Astronomy (miscellaneous), Surface acoustic waves, Acoustics, Surface plasmons, 02 engineering and technology, Crystal lattices, 01 natural sciences, Scattering, Resonator, Dispersion function, [SPI]Engineering Sciences [physics], Optics, Dispersion relation, 0103 physical sciences, Dispersion (optics), Wavenumber, Architectural acoustics, [INFO]Computer Science [cs], [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], ComputingMilieux_MISCELLANEOUS, Electromagnetic optics, 010302 applied physics, Physics, business.industry, Attenuation, Acoustic wave, [PHYS.MECA]Physics [physics]/Mechanics [physics], 021001 nanoscience & nanotechnology, Surface waves, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Surface wave, Speed of sound, Group velocity, Wave attenuation, 0210 nano-technology, business, Dispersion relations
Abstract

International audience; The complex dispersion relation of surface acoustic waves (SAWs) at a lossy resonant metasurface is theoretically and experimentally reported. The metasurface consists of the periodic arrangement of borehole resonators in a rigid substrate. The theoretical model relies on a boundary layer approach that provides the effective metasurface admittance governing the complex dispersion relation in the presence of viscous and thermal losses. The model is experimentally validated by measurements in the semi-anechoic chamber. The complex SAW dispersion relation is experimentally retrieved from the analysis of the spatial Laplace transform of the pressure scanned along a line at the metasurface. The geometrical spreading of the energy from the speaker is accounted for, and both the real and imaginary parts of the SAW wavenumber are obtained. The results show that the strong reduction of the SAW group velocity occurs jointly with a drastic attenuation of the wave, leading to the confinement of the field close to the source and preventing the efficient propagation of such slow-sound surface modes. The method opens perspectives to theoretically predict and experimentally characterize both the dispersion and the attenuation of surface waves at structured surfaces.

Published
2017

7. Numerical modeling of ultrasonic coda wave interferometry in a multiple scattering medium with a localized nonlinear defect

Author

Jean-Baptiste Legland, Vincent Tournat, Mathieu Chekroun, Odile Abraham, D. Pageot, Guangzhi Chen, Laboratoire Géophysique et évaluation non destructive ( IFSTTAR/GERS/GeoEND ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), RP2-J15100 projet LMAc 2IDANL (03/09/2015 - 31/12/2099), Laboratoire Géophysique et évaluation non destructive (GERS-GeoEND ), Université Gustave Eiffel, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), and Harvard University [Cambridge]

Subjects
Acoustics, Spectral element method, CONTROLE NON DESTRUCTIF, General Physics and Astronomy, MODELISATION NUMERIQUE, 01 natural sciences, Coda, [SPI]Engineering Sciences [physics], 0103 physical sciences, [ SPI ] Engineering Sciences [physics], 010301 acoustics, Elastic modulus, 010302 applied physics, Physics, CODA WAVE INTERFEROMETRY, Scattering, Applied Mathematics, Relative velocity, ULTRASON, Mechanics, Computational Mathematics, Nonlinear system, Interferometry, Amplitude, Modeling and Simulation, ACOUSTIQUE, INTEROMETRIE
Abstract

In this paper, the spectral element method is used to perform a parametric sensitivity study of the nonlinear coda wave interferometry (NCWI) method in a homogeneous or heterogeneous sample with localized damage. The influence of a strong pump wave on localized nonlinear damage is modeled as modifications to the elastic properties of an effective damage zone (EDZ), depending on the pump wave amplitude. These modifications are quantified with coda wave interferometry through an overall wave velocity variation probed by a reverberated or multiple scattered coda wave. Results demonstrate that the NCWI observables are independent of the source/receiver positions. Also, relations between the EDZ parameters and method observables are established, e.g. the relative velocity variation is found to be proportional to the product of the change in elastic modulus and the EDZ area. The numerical results reported constitute another step towards quantification and forecasting of the nonlinear acoustic response of a cracked material, which proves to be necessary for a quantitative non-destructive evaluation. Furthermore, it is shown numerically that NCWI sensitivity and applicability are similar for the cases of reverberated waves in a cavity and multiply scattered waves in a heterogeneous medium.

Published
2017

8. Elastic Vector Solitons in Soft Architected Materials

Author

Katia Bertoldi, Jordan R. Raney, Vincent Tournat, Bolei Deng, School of Engineering and Applied Sciences [Cambridge] ( SEAS ), Harvard University [Cambridge], Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania [Philadelphia], Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Kavli Institute for Bionano Science & Technology, Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and Kavli Institute for Bionano Science & Technology [Harvard University] (KIBST)

Subjects
Physics, Smart system, Acoustics, General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Vibration, Nonlinear system, Amplitude, Planar, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Focus (optics), Dispersion (water waves), [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; We demonstrate experimentally, numerically, and analytically that soft architected materials can support the propagation of elastic vector solitons. More specifically, we focus on structures comprising a network of squares connected by thin and highly deformable ligaments and investigate the propagation of planar nonlinear elastic waves. We find that for sufficiently large amplitudes two components—one translational and one rotational—are coupled together and copropagate without dispersion. Our results not only show that soft architected materials offer a new and rich platform to study the propagation of nonlinear waves, but also open avenues for the design of a new generation of smart systems that take advantage of nonlinearities to control and manipulate the propagation of large amplitude vibrations.

Published
2017

9. Small-scale physical modeling of seismic-wave propagation using unconsolidated granular media

Author

Régis Mourgues, Roland Martin, Fayçal Rejiba, Ludovic Bodet, A. Dhemaied, Vincent Tournat, Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Géotechnique (cermes), Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Géosciences Environnement Toulouse (GET), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols ( METIS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Centre National de la Recherche Scientifique ( CNRS ), Géotechnique ( CERMES ), Laboratoire Navier ( NAVIER UMR 8205 ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -École des Ponts ParisTech ( ENPC ) -Centre National de la Recherche Scientifique ( CNRS ) -Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -École des Ponts ParisTech ( ENPC ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -École des Ponts ParisTech ( ENPC ) -Centre National de la Recherche Scientifique ( CNRS ), Géosciences Environnement Toulouse ( GET ), Institut de Recherche pour le Développement ( IRD ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), and Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)

Subjects
Physical model, Hydrogeology, Acoustics, Inversion (meteorology), Granular material, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, Geophysics, Amplitude, Geochemistry and Petrology, Surface wave, [ SPI.GCIV ] Engineering Sciences [physics]/Civil Engineering, Porous medium, Laser Doppler vibrometer, Geology
Abstract

International audience; Laboratory physical modeling and laser-based experiments are frequently proposed to tackle theoretical and methodological issues related to seismic prospecting, e.g., when experimental validations of processing or inversion techniques are required. Lasers are mainly used to simulate typical field acquisition setups on homogeneous and consolidated materials assembled into laboratory-scale physical models (PMs) of various earth structures. We suggested the use of granular materials to study seismic-wave propagation in unconsolidated and porous media and target near-surface exploration and hydrogeologic applications. We designed and tested the reproducibility of an experimental procedure to build and probe PMs consisting of micrometric glass beads (GBs). A mechanical source and a laser-Doppler vibrometer were used to record small-scale seismic lines at the surface of three GBs models. When guided surface acoustic mode theory should prevail in such unconsolidated granular packed structure under gravity, we only considered elastic-wave propagation in stratified media to interpret recorded data. Thanks to basic seismic processing and inversion methods (first arrivals and dispersion analyses), we were able to correctly retrieve the gradients of pressure- and shear-wave velocities in our models. A 3D elastic finite difference simulation of the experiment offered, despite significant differences in terms of amplitudes, a supplementary validation of our approximation, as far as elastic properties of the medium were concerned.

Published
2014

10. Joint speech and overlap detection: a benchmark over multiple audio setup and speech domains

Author

Lebourdais, Martin, Mariotte, Théo, Tahon, Marie, Larcher, Anthony, Laurent, Antoine, Montresor, Silvio, Meignier, Sylvain, Thomas, Jean-Hugh, Laboratoire d'Informatique de l'Université du Mans (LIUM), Le Mans Université (UM), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), This work was performed using HPC resources from GENCI–IDRIS (Grant 2022-AD011012565), French ANR GEM (ANR-19-CE38-0012), LMAC grant from Région Pays de la Loire., Le Mans Université, ANR-19-CE38-0012,GEM,Mesure de l'égalité entre les sexes dans les médias(2019), and European Project: 101007666,Exchanges for SPEech ReseArch aNd TechnOlogies

Subjects
overlap speech detection, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Speech segmentation, [INFO.INFO-SD]Computer Science [cs]/Sound [cs.SD], speech activity detection, multi-channel, [INFO.INFO-NE]Computer Science [cs]/Neural and Evolutionary Computing [cs.NE], [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract

Voice activity and overlapped speech detection (respectively VAD and OSD) are key pre-processing tasks for speaker diarization. The final segmentation performance highly relies on the robustness of these sub-tasks. Recent studies have shown VAD and OSD can be trained jointly using a multi-class classification model. However, these works are often restricted to a specific speech domain, lacking information about the generalization capacities of the systems. This paper proposes a complete and new benchmark of different VAD and OSD models, on multiple audio setups (single/multi-channel) and speech domains (e.g. media, meeting...). Our 2/3-class systems, which combine a Temporal Convolutional Network with speech representations adapted to the setup, outperform state-of-the-art results. We show that the joint training of these two tasks offers similar performances in terms of F1-score to two dedicated VAD and OSD systems while reducing the training cost. This unique architecture can also be used for single and multichannel speech processing.

Published
2023

11. Spatial Laplace transform for complex wavenumber recovery and its application to the analysis of attenuation in acoustic systems

Author

Jean-Philippe Groby, Amey Khanolkar, Nicholas Boechler, Alan Geslain, Claire Prada, P. Leclaire, Aroune Duclos, Samuel Raetz, M. Abi Ghanem, Morgan Hiraiwa, Samuel P. Wallen, Jérôme Laurent, Département de Recherche en Ingénierie des Véhicules pour l'Environnement [Nevers] (DRIVE), Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Department of Mechanical Engineering [University of Washington], University of Washington [Seattle], Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), University of California [San Diego] (UC San Diego), University of California (UC), Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Département de Recherche en Ingéniérie des Véhicules pour l'Environnement (DRIVE), Université de Bourgogne (UB), Abi Ghanem, Maroun, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, United States, affiliation inconnue, The Nobel Institute for Neurophysiology, Karolinska Institutet [Stockholm], ESPCI ParisTech, Département de Recherche en Ingéniérie des Véhicules pour l'Environnement ( DRIVE ), Université de Bourgogne ( UB ), LMAc project DECIMAP, LMAc project PAVNat, U.S. National Science Foundation CMMI-1333858, U.S. Army Research Office W911NF-15-1-0030, University of Washington Royalty Research Foundation, National Science Foundation DGE-1256082, ANR-13-BS09-0003,Metaudible,Conception de Metamatériaux absorbants le son dans la gamme audible ( 2013 ), LABEX WIFI (Laboratory of Excellence within the French Program 'Investments for the Future') under references ANR-10-LABX-24 and ANR-10-IDEX-0001-02 PSL*,LABEX WIFI (Laboratory of Excellence within the French Program 'Investments for the Future') under references ANR-10-LABX-24 and ANR-10-IDEX-0001-02 PSL, Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Sorbonne Université (SU)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Paris (UP)-Centre National de la Recherche Scientifique (CNRS), ANR-13-BS09-0003,Metaudible,Conception de Metamatériaux absorbants le son dans la gamme audible(2013), and ANR-10-LABX-0024,WIFI,Institut Langevin : Ondes et Images, du Fondamental à l'Innovation(2010)

Subjects
Wave propagation, [SPI] Engineering Sciences [physics], Acoustics, Generation, General Physics and Astronomy, Tortuosity, 01 natural sciences, Crystals, [PHYS] Physics [physics], Scattering, [SPI]Engineering Sciences [physics], 0103 physical sciences, Wavenumber, Acoustic wave equation, Damping Ratio, 010306 general physics, Dispersion (water waves), Propagation, 010301 acoustics, Physics, [PHYS]Physics [physics], [ PHYS ] Physics [physics], Laplace transform, Attenuation, Velocity Lamb Modes, Acoustic wave, Dispersion, Saturated Porous-Media, Parameters, Acoustic attenuation
Abstract

International audience; We present a method for the recovery of complex wavenumber information via spatial Laplace transforms of spatiotemporal wave propagation measurements. The method aids in the analysis of acoustic attenuation phenomena and is applied in three different scenarios: (i) Lamb-like modes in air-saturated porous materials in the low kHz regime, where the method enables the recovery of viscoelastic parameters; (ii) Lamb modes in a Duralumin plate in the MHz regime, where the method demonstrates the effect of leakage on the splitting of the forward S-1 and backward S-2 modes around the Zero-Group Velocity point; and (iii) surface acoustic waves in a two-dimensional microscale granular crystal adhered to a substrate near 100 MHz, where the method reveals the complex wave-numbers for an out-of-plane translational and two in-plane translational-rotational resonances. This method provides physical insight into each system and serves as a unique tool for analyzing spatiotemporal measurements of propagating waves. Published by AIP Publishing.

Published
2016

12. Characterisation of cubic oak specimens from the Vasa ship and recent wood by means of quasi-static loading and resonance ultrasound spectroscopy (RUS)

Author

E. Kristofer Gamstedt, Roberto Longo, Didier Laux, Alexey Vorobyev, Olivier Arnould, Nico P. van Dijk, Angström Laboratory, Uppsala University, Bois ( BOIS ), Laboratoire de Mécanique et Génie Civil ( LMGC ), Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d’Electronique et des Systèmes ( IES ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), ESEO Group, Financement : COST Action FP1101, Bois (BOIS), Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut d’Electronique et des Systèmes (IES), Matériaux, MicroCapteurs et Acoustique (M2A), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
0106 biological sciences, cubic samples, Materials science, compression test, Young's modulus, Orthotropic material, 01 natural sciences, Quasistatic loading, Biomaterials, symbols.namesake, Annan materialteknik, Vasa ship, 010608 biotechnology, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], medicine, Other Materials Engineering, Composite material, 040101 forestry, Resonant ultrasound spectroscopy, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Structural material, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Stiffness, [SPI.MECA.VIBR]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Vibrations [physics.class-ph], 04 agricultural and veterinary sciences, elastic constants, Compression (physics), archaeological wood, quasi-static loading, [ SPI.MECA.VIBR ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Vibrations [physics.class-ph], Shear (sheet metal), [ SPI.MECA.MEMA ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], symbols, resonant ultrasound spectroscopy (RUS), 0401 agriculture, forestry, and fisheries, medicine.symptom, oak wood
Abstract

The cylindrical orthotropy, inherent time-dependency response, and variation between and within samples make the stiffness characterisation of wood more challenging than most other structural materials. The purpose of the present study is to compare static loading with resonant ultrasound spectroscopy (RUS) and to investigate how to combine the advantages of each of these two methods to improve the estimation of the full set of elastic parameters of a unique sample. The behavior of wood as an orthotropic mechanical material was quantified by elastic engineering parameters, i.e. Poisson’s ratios and Young’s and shear moduli. Recent and waterlogged archaeological oak impregnated with polyethylene glycol (PEG) from the Vasa warship built in 1628 was in focus. The experimental results were compared, and the difference between RUS and static loading was studied. This study contributes additional information on the influence of PEG and degradation on the elastic engineering parameters of wood. Finally, the shear moduli and Poisson’s ratios were experimentally determined for Vasa archaeological oak for the first time.

Published
2016

13. Reconfigurable origami-inspired acoustic waveguides

Author

Babaee , Sahab, Overvelde , Johannes, Chen , Elizabeth, Tournat , Vincent, Bertoldi , Katia, John A. Paulson School of Engineering and Applied Science, Harvard University, AMOLF Institute, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Tournat, Vincent, Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), Harvard University [Cambridge], FOM Institute for Atomic and Molecular Physics (AMOLF), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and Kavli Institute for Bionano Science & Technology [Harvard University] (KIBST)

Subjects
[PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; We combine numerical simulations and experiments to design a new class of reconfigurable waveguides based on three-dimensional origami-inspired metamaterials. Our strategy builds on the fact that the rigid plates and hinges forming these structures define networks of tubes that can be easily reconfigured. As such, they provide an ideal platform to actively control and redirect the propagation of sound. We design reconfigurable systems that, depending on the externally applied deformation, can act as networks of waveguides oriented along one, two, or three preferential directions. Moreover, we demonstrate that the capability of the structure to guide and radiate acoustic energy along predefined directions can be easily switched on and off, as the networks of tubes are reversibly formed and disrupted. The proposed designs expand the ability of existing acoustic metamate-rials and exploit complex waveguiding to enhance control over propagation and radiation of acoustic energy, opening avenues for the design of a new class of tunable acoustic functional systems.

Published
2016

14. Influence of multiple scattering in heterogeneous concrete on results of the surface wave inverse problem

Author

A. Le Duff, Mathieu Chekroun, Odile Abraham, V. Métais, Guy Plantier, Loïc Le Marrec, Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Recherche Mathématique de Rennes ( IRMAR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -AGROCAMPUS OUEST-École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National des Sciences Appliquées ( INSA ) -Université de Rennes 2 ( UR2 ), Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), ESEO-GSII ( GSII ), ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Direction scientifique ( IFSTTAR/DS ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Institut de Recherche Mathématique de Rennes (IRMAR), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), ESEO-GSII (GSII), Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Direction scientifique (IFSTTAR/DS), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), and ANR-11-LABX-0020,LEBESGUE,Centre de Mathématiques Henri Lebesgue : fondements, interactions, applications et Formation(2011)

Subjects
Materials science, Wave propagation, 01 natural sciences, symbols.namesake, Dispersion relation, 0103 physical sciences, General Materials Science, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], Rayleigh wave, Rayleigh waves, 010301 acoustics, 010302 applied physics, Scattering, Mechanical Engineering, Isotropy, Mathematical analysis, [ PHYS.MECA.MEFL ] Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph], Condensed Matter Physics, multiple scattering, Classical mechanics, Surface wave, symbols, Group velocity, inverse problem, Phase velocity, dispersion curves, Concrete
Abstract

International audience; This paper computes the phase velocity dispersion curves of coherent surface waves by taking into account multiple scattering in an elastic matrix containing elastic circular inclusions. The computed dispersion curves are inverted with a global neighborhood algorithm that considers a stratified medium with linear homogeneous and isotropic elastic layers. The impact of multiple scattering on the results is quantified. Since the surface wave phase velocity is not constant with frequency, the inversion provides solutions composed of homogeneous layers. The shear wave velocity profiles of the inverted medium and their impact on concrete porosity estimation is the subject of discussion.

Published
2016

15. Monitoring of autogenous crack healing in cementitious materials by the nonlinear modulation of ultrasonic coda waves, 3D microscopy and X-ray microtomography

Author

Odile Abraham, Benoit Hilloulin, Frédéric Grondin, Olivier Durand, Jean-Baptiste Legland, Ahmed Loukili, Vincent Tournat, Elisabeth Lys, Institut de Recherche en Génie Civil et Mécanique ( GeM ), Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Géophysique et évaluation non destructive ( IFSTTAR/GERS/GeoEND ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire SUBATECH Nantes ( SUBATECH ), Mines Nantes ( Mines Nantes ) -Université de Nantes ( UN ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Magnel Laboratory [Ghent University], Universiteit Gent = Ghent University [Belgium] (UGENT), Laboratoire Géophysique et évaluation non destructive (IFSTTAR/GERS/GeoEND), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, X-ray microtomography, Cracks, IMAGERIE 3D, 0211 other engineering and technologies, Self-healing, 02 engineering and technology, FISSURE, Signal, Coda, Optics, 021105 building & construction, Microscopy, medicine, MICROTOMOGRAPHIE, BETON, [ SPI.GCIV ] Engineering Sciences [physics]/Civil Engineering, General Materials Science, Decorrelation, ONDE, Civil and Structural Engineering, Fissure, business.industry, Ultrasonic wave speed, ULTRASON, Building and Construction, AUTOREPARATION, VAGUE, 021001 nanoscience & nanotechnology, Interferometry, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, medicine.anatomical_structure, MICROSCOPIE, 3D microscopy, Ultrasonic sensor, 0210 nano-technology, business, ONDE ELECTROMAGNETIQUE, Concrete, RAYON X
Abstract

International audience; In this work the non-destructive monitoring of the self-healing progress of cracked mortars is presentedthrough the use of three combined methods: nonlinear Coda Wave Interferometry, 3D microscopy and Xray computed microtomography (CT). The aim of the acoustic method is to compare, at various healingstages, both the ultrasonic velocity variations and decorrelation coefficients between a reference codasignal and a signal perturbed by a high level lower-frequency elastic wave. The decrease in the relativevariation of the extracted nonlinearities demonstrates its ability to accurately monitor global crack filling.3D microscopy also reveals this capability. Measurement results of these two techniques agree for theinfluence of age at cracking on healing potential. In reducing the voxel size to 12 lm, X-ray CT imagesconfirm the creation of localized bridges between crack faces and provide information on their location.

Published
2016

16. On the detection of nanoparticle cloud migration by a resonant photonic surface signal towards sedimentation velocity measurements

Author

L. Garnier, J. Gastebois, H. Lhermite, V. Vié, A. Saint-Jalmes, H. Cormerais, E. Gaviot, B. Bêche, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), CentraleSupélec [campus de Rennes], Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR), and Fondation Rennes 1Fondation BPGO - Entreprises Grand OuestSATT Ouest Valorisation projet SOLUTION_3M Cordée de la réussite PASS 'Pour une Ambition Scolaire Scientifique'

Subjects
[PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Optoelectronic detection, Sedimentation rate, Nanoparticle migration, Surface resonant signal, Integrated photonic devices, Atomic and Molecular Physics, and Optics, Real time signal processing, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Fragmented material, [SPI]Engineering Sciences [physics], [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

International audience; Migration and sedimentation of solid particles in a liquid are physical phenomena involving accumulation of soft matter or decantation of fragmented matter. A thorough understanding together with relevant measurements are prerequisites regarding many fields, including medicine, galenic pharmacology, food processing, and the cosmetics industry. In this paper, we investigate the feasibility of monitoring and detecting the migration of a nanoparticle cloud with a resonant light probe. For this purpose, hybrid silicon/silica/UV210 organic integrated photonic racetrack resonators were patterned by thin film processes to be used as sensors measuring the outcome of the impact of a cloud of nanoparticles, the dynamic migration plus sedimentation phenomenon of the nanoparticle cloud in water. A broadband superluminescent diode has been used for the excitation. Then, the spectral characteristics of the resonant guided modes have been analyzed, considering the observed changes while tracking the free spectral range of the transduced comb spectra as a function of time. The way to operate can be summarized as follows: Solutions based on spherical silica nanoparticles of fixed size are prepared and subjected to rheological measurements to obtain their respective viscosities. Next, a millimeter tank filled with water is conveniently placed on the active surface of the sensing chip, prior to the addition of one of the previously mentioned solutions. The series of spectra are acquired during the whole migration sequence and the transduced optical signal is then directly processed and treated by a specific code operated in real time by way of Lagrange interpolation polynomials. Collected data are then compared to a simple theoretical model describing the sedimentation of a spherical particle in water (Stokes' law). Eventually, the implementation of the device in a characterization platform and the development of a specific protocol allows a global treatment, whose description is followed by discussions on measurements and data. Consequently, after the impact of the drop containing the nanoparticles, the monitoring of a first phase regarding their fast cloud migration into the global study volume (with flow of matter plus vortex) eventually followed by their slow sedimentation, can be detected using such a resonant light probe. The overall duration of the first phase associated with sedimentation velocities is in the order of a few tens of µm/min for particles with submicron diameters (several hundreds of nanometers); a first attempt of comparison of this first phase with the results of the classic Stokes model would give a convergence of the values reaching between 9 and 19% for the sedimentation rates.

Published
2023

17. A Generalization of Poiseuille’s Law for the Flow of a Self-Similar (Fractal) Fluid through a Tube Having a Fractal Rough Surface

Author

Abdellah Bouchendouka, Zine El Abiddine Fellah, Zakaria Larbi, Nicholas O. Ongwen, Erick Ogam, Mohamed Fellah, Claude Depollier, Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger] (USTHB), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Ondes et Imagerie (O&I), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Maseno University, Laboratoire de Physique Théorique [University of Science and Technology Houari Boumediene] (LPT), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Statistics and Probability, [SPI]Engineering Sciences [physics], fractal tube surface, self-similar fluid, noninteger dimensional spaces, Poiseuille’s law, Statistical and Nonlinear Physics, Navier–Stokes equations for fractal medium, surface fractal dimensions, Analysis
Abstract

In this paper, a generalization of Poiseuille’s law for a self-similar fluid flow through a tube having a rough surface is proposed. The originality of this work is to consider, simultaneously, the self-similarity structure of the fluid and the roughness of the tube surface. This study can have a wide range of applications, for example, for fractal fluid dynamics in hydrology. The roughness of the tube surface presents a fractal structure that can be described by the surface fractal noninteger dimensions. Complex fluids that are invariant to changes in scale (self-similar) are modeled as a continuous medium in noninteger dimensional spaces. In this work, the analytical solution of the Navier–Stokes equations for the case of a self-similar fluid flow through a rough “fractal” tube is presented. New expressions of the velocity profiles, the fluid discharge, and the friction factor are determined analytically and plotted numerically. These expressions contain fractal dimensions describing the effects of the fractal aspect of the fluid and of that of the tube surface. This approach reveals some very important results. For the velocity profile to represent a physical solution, the fractal dimension of the fluid ranges between 0.5 and 1. This study also qualitatively demonstrates that self-similar fluids have shear thickening-like behavior. The fractal (self-similarity) nature of the fluid and the roughness of the surface both have a huge impact on the dynamics of the flow. The fractal dimension of the fluid affects the amplitude and the shape of the velocity profile, which loses its parabolic shape for some values of the fluid fractal dimension. By contrast, the roughness of the surface affects only the amplitude of the velocity profile. Nevertheless, both the fluid’s fractal dimension and the surface roughness have a major influence on the behavior of the fluid, and should not be neglected.

Published
2023

18. Precursors and triggering mechanisms of granular avalanches

Author

Delannay , Renaud, Duranteau , Mickaël, Tournat , Vincent, Richard , Patrick, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Institut Jean le Rond d'Alembert (DALEMBERT), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Rennes ( IPR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Groupe matière condensée et matériaux ( GMCM ), Delannay, Renaud, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Institut Jean Le Rond d'Alembert ( DALEMBERT ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
granular media, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], granular packing, [ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], stability, [PHYS.COND.CM-GEN] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], avalanches, acoustics, flow transition, acoustic methods, [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; Exploration of the dynamical response of an inclined granular packing before the avalanche starts allows a study of the dynamical transition from a static packing to a flowing one and brings information which may be helpful for the prediction of the occurrence of the avalanche. During inclination, small rearrangements implying only a few grains are first detected. The size and the rate of these rearrangements increase with the inclination angle. At some stage, large amplitude and quasi periodical events are observed. These events, called precursors, consist of collective motions of grains. Other studies [2] showed that the precursors are bulk phenomena and allowed to interpret these events as reorganizations of the weak-contact sub network occurring in the packing.Besides optical imaging techniques which give access to grain motion and rearrangements during the tilting, acoustic methods can be experimentally used to detect precursors and to probe internal rearrangements in the bulk of the granular layer. Because part of the acoustic wave energy transports through the contact network and the elastic beads of the medium, the probing methods based on the monitoring of acoustic signatures are sensitive to changes in the elastic properties of the granular layer. We give an overview of the acoustic probing methods implemented previously in the experiments of granular layer destabilization. They can be divided in two groups, the passive methods where acoustic sensors are used to listen to the sounds emitted by the destabilized layer itself and the active methods where an acoustic signal with desired properties is generated and detected by transducers in the medium. Systematic experiments of granular layer destabilization for various granular media and external conditions are compared and allow better understanding of the mechanisms responsible for the appearance, periodicity and intensity of precursors.

Published
2015

19. Precursors and triggering mechanisms of granular avalanches

Author

Renaud Delannay, Vincent Tournat, Mickaël Duranteau, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Institut Jean le Rond d'Alembert (DALEMBERT), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Rennes ( IPR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Jean Le Rond d'Alembert ( DALEMBERT ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Materials science, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], General Engineering, Energy Engineering and Power Technology, Granular media, Mechanics, Acoustic wave, Granular layer, [ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Acoustics, Précurseurs d'avalanches, Precursor of avalanches, Signal, Acoustique, Transducer, Amplitude, [ PHYS.COND.CM-SM ] Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech], [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Statistical physics, Milieux granulaires, [PHYS.COND.CM-SM]Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech], Layer (electronics), Intensity (heat transfer)
Abstract

Exploration of the dynamical response of an inclined granular packing before the avalanche starts allows a study of the dynamical transition from a static packing to a flowing one and brings information which may be helpful for the prediction of the occurrence of the avalanche. During inclination, small rearrangements implying only a few grains are first detected. The size and the rate of these rearrangements increase with the inclination angle. At some stage, large amplitude and quasi periodical events are observed. These events, called precursors, consist of collective motions of grains. Other studies showed that the precursors are bulk phenomena and allowed to interpret these events as reorganizations of the weak-contact sub network occurring in the packing. Besides optical imaging techniques which give access to grain motion and rearrangements during the tilting, acoustic methods can be experimentally used to detect precursors and to probe internal rearrangements in the bulk of the granular layer. Because part of the acoustic wave energy transports through the contact network and the elastic beads of the medium, the probing methods based on the monitoring of acoustic signatures are sensitive to changes in the elastic properties of the granular layer. We give an overview of the acoustic probing methods implemented previously in the experiments of granular layer destabilization. They can be divided in two groups, the passive methods where acoustic sensors are used to listen to the sounds emitted by the destabilized layer itself and the active methods where an acoustic signal with desired properties is generated and detected by transducers in the medium. Systematic experiments of granular layer destabilization for various granular media and external conditions are compared and allow better understanding of the mechanisms responsible for the appearance, periodicity and intensity of precursors.

Published
2015

20. Monitoring of a Large Cracked Concrete Sample with Non-Linear Mixing of Ultrasonic Coda Waves

Author

Abraham , Odile, ZHANG , Yuxiang, Chapeleau , Xavier, Durand , Olivier, TOURNAT , Vincent, Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ), Institut des Sciences de la Terre ( ISTerre ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), IFFSTTAR, Inria, Université de Nantes, Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck, Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Institut des Sciences de la Terre (ISTerre), Centre National de la Recherche Scientifique (CNRS)-PRES Université de Grenoble-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck, Jaigu, Anne, Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Signal processing, Civil engineering SHM applications, [ SPI.MECA ] Engineering Sciences [physics]/Mechanics [physics.med-ph], [STAT.TH] Statistics [stat]/Statistics Theory [stat.TH], [PHYS.MECA]Physics [physics]/Mechanics [physics], [STAT.TH]Statistics [stat]/Statistics Theory [stat.TH], [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph], [ STAT.TH ] Statistics [stat]/Statistics Theory [stat.TH], Ultrasonic for (seismic, [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], [ PHYS.MECA ] Physics [physics]/Mechanics [physics], [ MATH.MATH-ST ] Mathematics [math]/Statistics [math.ST], [PHYS.MECA] Physics [physics]/Mechanics [physics], acoustic) methods, [MATH.MATH-ST] Mathematics [math]/Statistics [math.ST]
Abstract

International audience; A high precision can be achieved with ultrasonic coda waves to monitor the mechanical properties of concrete material (~10-5 in relative). This high sensitivity can be used to detect damage initiation and to closely follow concrete mechanical properties evolution with time. This advantage is counterbalance by the influence of environmental conditions making reproducibility of any experiment in concrete a challenging issue especially when in situ measurements are performed. Indeed thermal and water gradients present in the thickness of the structures (several decimetres) cannot be controlled and must be compensated. In this paper a protocol to remove environmental bias is proposed. Furthermore, to follow the apparition of a tensile crack in a metric size structure, non-linear mixing of coda wave via frequency-swept pump waves is tested. It is shown that, when the crack is closed (by pre-stressing cables), it is still possible to detect its presence. The non-linearity of the cracked zone remains at a high level, comparable to the case when the crack was open.

Published
2014

21. Slow Relaxation and Aging Phenomena at the Nanoscale in Granular Materials

Author

Patrick Richard, Vladimir Y. Zaitsev, Vitalyi Gusev, Vincent Tournat, Institute of Applied Physics of RAS, Russian Academy of Sciences [Moscow] ( RAS ), Radiosphysics departement, Nizhny Novgorod State University, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Granulats et Procédés d'Elaboration des Matériaux ( IFSTTAR/MAST/GPEM ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Russian Academy of Sciences [Moscow] (RAS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Granulats et Procédés d'Elaboration des Matériaux (IFSTTAR/MAST/GPEM), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM)

Subjects
Materials science, Bistability, granular materials, FOS: Physical sciences, General Physics and Astronomy, Thermal fluctuations, Mechanism based, Nanotechnology, 02 engineering and technology, Condensed Matter - Soft Condensed Matter, Granular material, 01 natural sciences, Physics - Geophysics, 83.80.Fg, 43.25.+y, 45.70.-n, 83.10.Tv, Granular matter, Metastability, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, 010306 general physics, Nanoscopic scale, Condensed Matter - Mesoscale and Nanoscale Physics, nanoscale, [ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], 021001 nanoscience & nanotechnology, Geophysics (physics.geo-ph), Chemical physics, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], slow relaxation, Soft Condensed Matter (cond-mat.soft), Relaxation (physics), 0210 nano-technology
Abstract

Complex systems having metastable elements often demonstrate nearly log-time relaxations and a kind of aging: repeated stimuli weaken the system's relaxational response. Granular matter is known to exhibit a wealth of such behaviors, for which the role of thermal fluctuations is usually ignored. However, we demonstrate that the latter can pronouncedly affect contacting mesoscopic-scale asperities and be macroscopically observed via appropriate acoustic effects. We also propose a mechanism comprising slow relaxations and aging as intrinsic properties of a wide class of systems with metastable states., Comment: 5 pages, 4 figures

Published
2014

22. Contrôle d’une structure du béton de taille réelle par analyses de la coda ultrasonore avec compensation des biais thermiques

Author

Zhang, Yumeng, Abraham, Odile, Tournat, Vincent, Le Duff, Alain, Lascoup, Bertrand, Durand, Olivier, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), ESEO-GSII ( GSII ), ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), ESEO-GSII (GSII), and Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL)

Subjects
[ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

23. Physical modelling of a surface-wave survey over a laterally varying granular medium with property contrasts and velocity gradients

Author

Ludovic Bodet, Régis Mourgues, Paolo Bergamo, Vincent Tournat, Laura Socco, Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Italian Ministry of Education, University and Research, Region Pays de la Loire, France, Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géodynamique UMR6112 (LPG), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols ( METIS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Physical model, Wave propagation, Acoustic properties, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Acoustics, Granular material, Wave propgation, Fourier analysis, [ SDU.STU.GP ] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], symbols.namesake, Geophysics, Geochemistry and Petrology, Surface wave, symbols, Guided waves, Ultrasonic sensor, Surface waves and free oscillations, Porous medium, Dispersion (water waves), Geology, acoustic properties
Abstract

International audience; Laboratory experiments using laser-based ultrasonic techniques can be used to simulate seismic surveys on highly controlled small-scale physical models of the subsurface. Most of the time, such models consist in assemblies of homogeneous and consolidated materials. To enable the physical modelling of unconsolidated, heterogeneous and porous media, the use of granular materials is suggested here. We describe a simple technique to build a two-layer physical model characterized by lateral variations, strong property contrasts and velocity gradients. We use this model to address the efficiency of an innovative surface-wave processing technique developed to retrieve 2-D structures from a limited number of receivers. A step by step inversion procedure of the extracted dispersion curves yields accurate results so that the 2-D structure of the physical model is satisfactorily reconstructed. The velocity gradients within each layer are accurately retrieved as well, confirming current theoretical and experimental studies regarding guided surface acoustic modes in unconsolidated granular media.

Published
2014

24. Small crack detection in cementitious materials using nonlinear coda wave modulation

Author

Benoit Hilloulin, Olivier Durand, Odile Abraham, Ahmed Loukili, Vincent Tournat, Frédéric Grondin, Yuxiang Zhang, Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la Terre (ISTerre), Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Auscultation et Imagerie (IFSTTAR/GERS/AI), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Institut de Recherche en Génie Civil et Mécanique ( GeM ), Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS ), Institut des Sciences de la Terre ( ISTerre ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Auscultation et Imagerie ( IFSTTAR/GERS/AI ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Centre National de la Recherche Scientifique (CNRS)-PRES Université de Grenoble-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
Materials science, Cracks, [ SPI.MECA ] Engineering Sciences [physics]/Mechanics [physics.med-ph], Acoustics, 02 engineering and technology, FISSURE, 01 natural sciences, Coda, 0103 physical sciences, SURVEILLANCE, SANTE, medicine, BETON, General Materials Science, Geotechnical engineering, 010301 acoustics, Decorrelation, Mixing (physics), ONDE, Fissure, VITESSE, Mechanical Engineering, Ultrasonic wave speed, ULTRASON, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, Condensed Matter Physics, Nonlinear system, medicine.anatomical_structure, Amplitude, Health monitoring, Ultrasonic sensor, Cementitious, 0210 nano-technology, Concrete
Abstract

This paper presents an ultrasonic method, based on the nonlinear acoustic mixing of coda waves with lower-frequency swept pump waves, for providing an efficient global detection of small cracks in cementitious materials. By simultaneously comparing, forboth uncracked and cracked mortars, the ultrasonic velocity variations and decorrelation coefficients between the unperturbed and perturbed signals with pump amplitude, this method makes it possible to accurately detect cracks with widths of around 20 μm in correlation with velocity variations of approximately 0.01%. The potential influence of certain material parameters such as microscopic damage is also discussed.

Published
2014

25. Suivi d'endommagement de composite par l'étude de la CODA ultrasonore

Author

Bertrand Lascoup, Vincent Tournat, Alain Le Duff, Odile Abraham, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Géophysique et évaluation non destructive ( IFSTTAR/GERS/GeoEND ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Laboratoire Géophysique et évaluation non destructive (IFSTTAR/GERS/GeoEND), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM)

Subjects
CODA, ENDOMMAGEMENT, [ SPI.MAT ] Engineering Sciences [physics]/Materials, MATERIAU COMPOSITE, ULTRASON, General Materials Science, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

The study of the ultrasonic CODA, already explored in the domain of civil engineering, is applied to composite materials. The damages' evolution is studied using piezoelectric sensors. The method presented here is based on the delay of an acoustic waveinvolved by colliding with defects within the structure. We focus at the end of the signal which contains the sum of all these multi-scattered waves compared to a reference. This data can beregarded to the health of materials (damage and/or strain).; L'étude de la CODA ultrasonore, déjà explorée dans le cadre de la surveillance d'ouvrage d'art, est ici appliquée à des matériaux composites à matrice organique. Un suivi des endommagements est réalisé en employant des capteurs piézoélectriques. La méthode sebase sur le retard que prend une onde acoustique en se heurtant aux différents défauts internes à la structure. On se focalise sur la fin du signal, qui contient la somme de tous ces trajets multidiffusés, par rapport à une référence. Cet observable est mis en relation avec l'état de santé du matériau (endommagement et/ou déformation).

Published
2014

26. Estimation of Heart Rate From Tracheal Sounds Recorded for the Sleep Apnea Syndrome Diagnosis

Author

Nathalie Freycenon, Laurent Simon, Roberto Longo, ESEO-GSII (GSII), ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Cidelec, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
medicine.medical_specialty, Noise measurement, Polysomnography, Heart rate, 0206 medical engineering, Biomedical Engineering, 02 engineering and technology, Audiology, Electrocardiography, [SPI]Engineering Sciences [physics], Sleep Apnea Syndromes, medicine, Humans, Loud snoring, ComputingMilieux_MISCELLANEOUS, Respiratory Sounds, Sleep disorder, medicine.diagnostic_test, business.industry, Snoring, Sleep apnea, Phonocardiography, Apnea, Indexes, medicine.disease, 020601 biomedical engineering, respiratory tract diseases, Obstructive sleep apnea, Breathing, [SDV.IB]Life Sciences [q-bio]/Bioengineering, medicine.symptom, business, Estimation
Abstract

Obstructive sleep apnea is a common sleep disorder with a high prevalence and often accompanied by significant snoring activity. To diagnose this condition, polysomnography is the standard method, where a neck microphone could be added to record tracheal sounds. These can then be used to study the characteristics of breathing, snoring or apnea. In addition cardiac sounds, also present in the acquired data, could be exploited to extract heart rate. The paper presents new algorithms for estimating heart rate from tracheal sounds, especially in very loud snoring environment. The advantage is that it is possible to reduce the number of diagnostic devices, especially for compact home applications. Three algorithms are proposed, based on optimal filtering and cross-correlation. They are tested firstly on one patient presenting significant pathology of apnea syndrome, with a recording of 509 min. Secondly, an extension to a database of 16 patients is proposed (16 hours of recording). When compared to a reference ECG signal, the final results obtained from tracheal sounds reach an accuracy of 81% to 98% and an RMS error from 1.3 to 4.2 bpm, according to the level of snoring and to the considered algorithm.

Published
2021

27. Use of the filtered-x least-mean-squares algorithm to adapt personal sound zones in a car cabin

Author

Bruno Gazengel, Lucas Vindrola, Jean-Christophe Chamard, Manuel Melon, Stellantis - PSA Centre Technique de Vélizy, Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
Least mean square algorithm, Acoustics and Ultrasonics, Adaptive algorithm, Computer science, Acoustics, External noise, 01 natural sciences, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], 030507 speech-language pathology & audiology, 03 medical and health sciences, Arts and Humanities (miscellaneous), Adaptive system, 0103 physical sciences, Convergence (routing), Sensitivity (control systems), 0305 other medical science, 010301 acoustics, ComputingMilieux_MISCELLANEOUS
Abstract

One of the main fields of application of personal sound zones (PSZs) is the car industry. PSZ systems are usually designed assuming that the acoustic environment is not changing. However, due to variability in the car cabin's acoustic conditions, it is necessary to design a system capable of adapting to these variations. This paper introduces the use of the filtered-x least-mean-squares algorithm to adapt a PSZ system in a car cabin when the seat positions change. The article focuses on four aspects. First, the effect of the initial coefficients is investigated to help with the convergence of the adaptive algorithm. Second, a study is made on the definition of the desired pressure and its effect on the reproduction. Third, the system's sensitivity to external noise is also evaluated. Last, the possibility to reduce the number of microphones for the adaptive system is considered. The method's performance is evaluated using a two headrest system installed in a car cabin and when moving the seats to different positions. It is shown that the system is capable of maintaining the performance in the different seat positions.

Published
2021

28. Neolithic stone settlements as locally resonant metasurfaces

Author

Brûlé, Stéphane, Ungureanu, Bogdan, Enoch, Stefan, Guenneau, Sébastien, Dynamic Soil Laboratory, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Abraham de Moivre, Imperial College London-Centre National de la Recherche Scientifique (CNRS), and Guenneau, Sébastien

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], Physics - Geophysics, Condensed Matter - Materials Science, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Computational Physics (physics.comp-ph), Physics - Computational Physics, Geophysics (physics.geo-ph)
Abstract

We study the dynamic surface response of neolithic stone settlements obtained with seismic ambient noise techniques near the city of Carnac in French Brittany. Surprisingly, we find that menhirs (neolithic human size standing alone granite stones) with an aspect ratio between 1 and 2 periodically arranged atop a thin layer of sandy soil laid on a granite bedrock, exhibit fundamental resonances in the range of 10 to 25 Hz. We propose an analogic Kelvin-Voigt viscoelastic model that explains the origin of such low frequency resonances. We further explore low frequency filtering effect with full wave finite element simulations. Our numerical results confirm the bending nature of fundamental resonances of the menhirs and further suggest additional resonances of rotational and longitudinal nature in the frequency range 25 to 50 Hz. Our study thus paves the way for large scale seismic metasurfaces consisting of granite stones periodically arranged atop a thin layer of regolith over a bedrock, for ground vibration mitigation in earthquake engineering., 6 pages, 7 figures

Published
2022

29. A laser pistonphone designed for absolute calibration of infrasound sensors from 10 mHz up to 20 Hz

Author

D Rodrigues, P Vincent, R Barham, F Larsonnier, S Durand, Laboratoire commun de métrologie LNE-CNAM (LCM), Laboratoire National de Métrologie et d'Essais [Trappes] (LNE )-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], General Engineering
Abstract

There has been an increased demand for traceable calibrations at infrasonic frequencies in support of geophysical monitoring applications, an example being the Comprehensive Nuclear-Test-Ban Treaty Organization, which provides global international coverage for a nuclear testing ban, and requires the International Monitoring System. In this paper, a new laser pistonphone design is presented with the objective of establishing primary standards for sound pressure at very low frequencies down to 10 mHz. The piston is a modified accessorized loudspeaker driver whose diameter is equal to the diameter of the front pistonphone cavity. The volume velocity of the piston is measured through a laser interferometer and the current version was designed to have an upper frequency limit of 20 Hz, to overlap with the closed coupler reciprocity method of calibration. Particular attention has been given to the sealing to avoid pressure leakage loss. The dimensions of the front cavity were designed to allow the calibration of a large variety of sensors, including microphones, barometers, manometers and microbarometers. Examples of calibrations for several sensors are presented and also an uncertainty budget for the Brüel & Kjær type 4160 laboratory standard microphones, commonly used for primary calibrations. Finally, the metrological performance of the laser pistonphone is demonstrated by comparing the calibration results with those obtained with alternative methods.

Published
2022

30. L’Observatoire de l’environnement nocturne de La Réunion, un dispositif partenarial de recherche-action territorialisée

Author

Challéat, Samuel, Milian, Johan, Lapostolle, Dany, Olivette, Lisa, Prévost, Héloïse, Barré, Kévin, Bénos, Rémi, Maisonobe, Marion, Ronzani, Charles, Foglar, Hélène, Loose, David, Renaud, Matthieu, Jeanty, Patrick, Morel, Béatrice, Delsaut, Mathieu, Morvan, Sylvain, Farrugia, Nicolas, Pajusco, Nicolas, Dofal, Anthony, Froidevaux, Jérémy, Godet, L., Géographie de l'environnement (GEODE), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Observatoire de l'environnement nocturne (OEN), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J), Laboratoire Dynamiques Sociales et Recomposition des Espaces (LADYSS), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Théoriser et modéliser pour aménager (UMR 6049) (ThéMA), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Parc national de La Réunion, Centre d'études en sciences sociales sur les mondes africains, américains et asiatiques (CESSMA UMRD 245), Institut de Recherche pour le Développement (IRD)-Institut National des Langues et Civilisations Orientales (Inalco)-Université Paris Cité (UPCité), Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Géographie-cités (GC (UMR_8504)), Université Paris 1 Panthéon-Sorbonne (UP1)-École des hautes études en sciences sociales (EHESS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire Univers et Particules de Montpellier (LUPM), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Energy Lab (ENERGY Lab), Université de La Réunion (UR), Département Mathematical and Electrical Engineering (IMT Atlantique - MEE), IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), University of Stirling, Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes ), Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (Nantes Univ)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN), Nantes Université - pôle Humanités, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Humanités, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN), Nantes Université (Nantes Univ), Observatoire de l'environnement nocturne (CNRS), Observatoire de l'environnement nocturne de La Réunion (CNRS/Parc national de La Réunion), Challéat, Samuel, Université Toulouse - Jean Jaurès (UT2J)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse - Jean Jaurès (UT2J)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Centre National de la Recherche Scientifique (CNRS), Energy Lab - Laboratoire d'Energétique, d'Electronique et Procédés (ENERGY Lab - LE2P), Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (Nantes Univ)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (NantesUniv – IGARUN), and Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (NantesUniv – IGARUN)

Subjects
[SHS.GEO] Humanities and Social Sciences/Geography, [SDE.MCG]Environmental Sciences/Global Changes, PARIS team, ALAN, [SHS.ENVIR] Humanities and Social Sciences/Environmental studies, observatoire, pollution lumineuse, environnement nocturne, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [SHS.ARCHI]Humanities and Social Sciences/Architecture, space management, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, WP, [SHS.GEO]Humanities and Social Sciences/Geography, [SDE.ES]Environmental Sciences/Environmental and Society, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, [SDE.MCG] Environmental Sciences/Global Changes, environnement-sociétés, [SHS.ENVIR]Humanities and Social Sciences/Environmental studies, Observatoire de l'environnement nocturne, [SDE.ES] Environmental Sciences/Environmental and Society, [SHS.ARCHI] Humanities and Social Sciences/Architecture, space management, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Observatoire de l'environnement nocturne de La Réunion, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

Présentation du dispositif Observatoire de l'environnement nocturne (CNRS) et Observatoire de l'environnement nocturne de La Réunion (CNRS/Parc national de La Réunion) aux services internes du Parc national de La Réunion.

Published
2022

31. Flow of a Self-Similar Non-Newtonian Fluid Using Fractal Dimensions

Author

Abdellah Bouchendouka, Zine El Abiddine Fellah, Zakaria Larbi, Nicholas O. Ongwen, Erick Ogam, Mohamed Fellah, Claude Depollier, Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger] (USTHB), Ondes et Imagerie (O&I), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Materials Science, Maseno University, Maseno, Kenya, Laboratoire de Physique Théorique [University of Science and Technology Houari Boumediene] (LPT), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Statistics and Probability, fractal dimensions, power-law fluid, non-Newtonian fluid, self-similar fluid, noninteger dimensional space, Statistical and Nonlinear Physics, Fractal dimension, Analysis, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; In this paper, the study of the fully developed flow of a self-similar (fractal) power-law fluid is presented. The rheological way of behaving of the fluid is modeled utilizing the Ostwald–de Waele relationship (covering shear-thinning, Newtonian and shear-thickening fluids). A self-similar (fractal) fluid is depicted as a continuum in a noninteger dimensional space. Involving vector calculus for the instance of a noninteger dimensional space, we determine an analytical solution of the Cauchy equation for the instance of a non-Newtonian self-similar fluid flow in a cylindrical pipe. The plot of the velocity profile obtained shows that the rheological behavior of a non-Newtonian power-law fluid is essentially impacted by its self-similar structure. A self-similar shear thinning fluid and a self-similar Newtonian fluid take on a shear-thickening way of behaving, and a self-similar shearthickening fluid becomes more shear thickening. This approach has many useful applications in industry, for the investigation of blood flow and fractal fluid hydrology

Published
2022
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32. Microphone Array Channel Combination Algorithms for Overlapped Speech Detection

Author

Mariotte, Théo, Larcher, Anthony, Montrésor, Silvio, Thomas, Jean-Hugh, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique de l'Université du Mans (LIUM), Le Mans Université (UM), ANR-19-CE23-0001,ExTENSoR,Réseaux de neurones évolutifs end-to-end pour la reconnaissance du locuteur(2019), and European Project: 101007666,Exchanges for SPEech ReseArch aNd TechnOlogies

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, multi-microphone, overlapped speech detection, distant speech, interpretability
Abstract

International audience; Overlapped speech occurs when multiple speakers are simultaneously active. This may lead to severe performance degradation in automatic speech processing systems such as speaker diarization. Overlapped speech detection (OSD) aims at detecting time segments in which several speakers are simultaneously active. Recent deep neural network architectures have shown impressive results in the close-talk scenario. However, performance tends to deteriorate in the context of distant speech. Microphone arrays are often considered under these conditions to record signals including spatial information. This paper investigates the use of the self-attention channel combinator (SACC) system as a feature extractor for OSD. This model is also extended in the complex space (cSACC) to improve the interpretability of the approach. Results show that distant OSD performance with self-attentive models gets closer to the nearfield condition. A detailed analysis of the cSACC combinationweights is also conducted showing that the self-attention module focuses attention on the speakers' direction.

Published
2022

33. Identification of avalanche precursors by acoustic probing in the bulk of tilted granular layers

Author

Vladimir Y. Zaitsev, Patrick Richard, Vincent Tournat, Renaud Delannay, Mickaël Duranteau, Institut de Physique de Rennes ( IPR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Applied Physics of RAS, Russian Academy of Sciences [Moscow] ( RAS ), This work is supported by ANR 2010-BLAN-0927-01 grant 'STABINGRAM' (for STABility loss IN GRAnu-lar Media)., Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Russian Academy of Sciences [Moscow] (RAS), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Surface (mathematics), granular flow, Materials science, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], granular materials, Dispersity, Analytical chemistry, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], 02 engineering and technology, Granular material, 01 natural sciences, [ SDU.STU.GP ] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [ PHYS.PHYS.PHYS-GEO-PH ] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], 07.64.+z, 45.70.Ht, 45.70.Mg, 0103 physical sciences, acoustic measurement, 010306 general physics, Millisecond, stability, 021001 nanoscience & nanotechnology, Condensed Matter::Soft Condensed Matter, Nonlinear system, Chemical physics, Free surface, 0210 nano-technology, Constant angular velocity, Event (particle physics)
Abstract

International audience; Understanding the precursors of granular avalanches is important for the prediction of critical events. As part of the dynamics leading to the avalanche, precursors are identified as collective motions of grains on the free surface. When a granular pile is tilted at a constant angular velocity, precursors appear quasi-periodically. In this paper we simultaneously caracterize precursors on the free surface with an optical method and in the bulk with acoustic methods (nonlinear and linear). Surprisingly, the use on nonlinear acoustic method is not necessary to probe rearrangements in the bulk of the granular material. A linear method can also be used provided that the frequency region is the one where the acoustic propagation is sensitive to the solid skeleton formed by the bead-contact network. Our experiments conducted with monodisperse glass beads show that their surface features are by far the most important for the precursor propreties. Our results allow to probe with a few millisecond time resolution (less than 10−2 degree of inclination) the relaxation phenomena associated to each precursor event. Interpretations of different precursors and different experiments provide an interesting train of thought for the understanding of destabilization mechanisms in granular systems.

Published
2013

34. Using simple shape three-dimensional inclusions to enhance porous layer absorption

Author

Benoit Nennig, Vincent Tournat, Bruno Brouard, Jean-Philippe Groby, Olivier Dazel, Clément Lagarrigue, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux ( LISMMA ), Université Paris 8 Vincennes-Saint-Denis ( UP8 ) -SUPMECA - Institut supérieur de mécanique de Paris, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux (LISMMA), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA), and SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Materials science, Acoustics and Ultrasonics, Embedment, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Rigid frame, Classical Physics (physics.class-ph), FOS: Physical sciences, Torus, Physics - Classical Physics, Molecular physics, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [SPI]Engineering Sciences [physics], Arts and Humanities (miscellaneous), Attenuation coefficient, Cylinder, Cube, Absorption (electromagnetic radiation), Porous medium, ComputingMilieux_MISCELLANEOUS, [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

The absorption properties of a metaporous material made of non-resonant simple shape three-dimensional inclusions (cube, cylinder, sphere, cone and torus) embedded in a rigidly backed rigid frame porous material is studied. A nearly total absorption can be obtained for a frequency lower than the quarter-wavelength resonance frequency due to the excitation of a trapped mode. To be correctly excited, this mode requires a filling fraction larger in the three-dimensions than in the two-dimensions for purely convex (cube, cylinder, sphere, and cone) shapes. At low frequencies, a cube is found to be the best purely convex inclusion shape to embed in a cubic unit cell, while the embedment of a sphere or a cone cannot lead to an optimal absorption for some porous materials. At fixed position of purely convex shape inclusion barycentre, the absorption coefficient only depends on and filling fraction and does not depend on the shape below the Bragg frequency arising from the interaction between the inclusion and its image with respect to the rigid backing. The influence of the angle of incidence is also shown. The results, in particular the excitation of the trapped mode, are validated experimentally in case of cubic inclusions., Comment: Submitted version to Journal of the Acoustical Society of America in June 2013. A revised version has been resubmitted in February 2014

Published
2013

35. Study of concrete's behavior under 4-point bending load using Coda Wave Interferometry (CWI) analysis

Author

Olivier Durand, Odile Abraham, Bertrand Lascoup, A. Le Duff, Yuting Zhang, Xavier Chapeleau, Vincent Tournat, L.‐M. Cottineau, ESEO-GSII (GSII), ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), ESEO-GSII ( GSII ), PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Materials science, business.industry, Condition monitoring, 020101 civil engineering, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 02 engineering and technology, Structural engineering, 01 natural sciences, 0201 civil engineering, Coda, Stress field, Interferometry, Compressive strength, Thermocouple, 0103 physical sciences, Ultimate tensile strength, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 010301 acoustics, Strain gauge
Abstract

International audience; Coda Wave Interferometry (CWI) is an ultrasonic NDT method suitable for complex material such as concrete that can precisely measure small propagation velocity variation (10â??2%). By measuring variation of propagation velocity in concrete caused by acoustoelasticity phenomena, CWI analysis can be used to monitor concrete's internal stress level. For the first time, CWI is used to measure propagation velocity variations due to a stress field in a concrete beam under four-points bending test, which contains simultaneously compressive and tensile stress. Embedded optical-fiber sensors, strain gauges are used in the experiment, in order to confirm and validate the CWI analysis result. Thermocouples are also embedded into concrete beams for monitoring internal temperature fluctuations.

Published
2013

36. Extended stress gradient elastodynamics: Wave dispersion and micro-macro identification of parameters

Author

Régis Cottereau, Bruno Lombard, Nicolas Favrie, Logan Schwan, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Institut universitaire des systèmes thermiques industriels (IUSTI), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Stress gradient, Wave propagation, Second-order 8 homogenization, 02 engineering and technology, Stress gradient media Generalized continua, 0203 mechanical engineering, Wave dispersion, Hyperbolic system, General Materials Science, Macro, Continuum hypothesis, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Physics, Applied Mathematics, Mechanical Engineering, Mathematical analysis, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Wave equation, 020303 mechanical engineering & transports, Mechanics of Materials, Modeling and Simulation, Bounded function, Group velocity, 0210 nano-technology, Asymptotic homogenization
Abstract

International audience; In its original formulation by Forest & Sab (Math. Mech. Solids, 2017), stress gradient elastodynamics incorporate two inner-lengths to account for size effects in continuum theory. Here, an extended one-dimensional stress gradient model is developed by means of Lagrangian formalism, incorporating an additional inner-length and a fourth-order space derivative in the wave equation. Dispersive properties are characterised and hyperbolicity and stability are proven. Group velocity remains bounded in both original and extended models, proving causality is satisfied for both contrary to a usually-accepted postulate. By means of two-scale asymptotic homogeniza-tion, the high-order wave equation satisfied by the stress gradient model is shown to stand for an effective description of heterogeneous materials in the low-frequency range. An upscaling method is developed to identify the stress gradient material parameters and bulk forces on the parameters of elastic micro-structures. Application of the micro-macro procedure to periodic multi-laminates demonstrates the accuracy of the stress gradient continuum to account for the dispersive features of wave propagation. Frequency and time-domain simulations illustrate these properties.

Published
2021

37. Broadband Transmission Loss Using the Overlap of Resonances in 3D Sonic Crystals

Author

Alexandre Lardeau, Jean-Philippe Groby, Vicente Romero-García, Département de Recherche en Ingénierie des Véhicules pour l'Environnement [Nevers] (DRIVE), Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Département de Recherche en Ingéniérie des Véhicules pour l'Environnement ( DRIVE ), Université de Bourgogne ( UB ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), FRAE, ANR-13-BS09-0003,Metaudible,Conception de Metamatériaux absorbants le son dans la gamme audible ( 2013 ), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB)

Subjects
sonic crystals, Materials science, Band gap, Frequency band, General Chemical Engineering, Acoustics, [ SPI.MAT ] Engineering Sciences [physics]/Materials, 01 natural sciences, 010305 fluids & plasmas, Inorganic Chemistry, Resonator, Optics, Photonic Crystals, acoustic metamaterials, acoustic band gap materials, Dispersion relation, 0103 physical sciences, lcsh:QD901-999, General Materials Science, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Composites, Coupling, business.industry, [PHYS.MECA]Physics [physics]/Mechanics [physics], Condensed Matter Physics, Finite element method, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Wavelength, Transmission (telecommunications), Helmholtz Resonators, Gaps, Waves, lcsh:Crystallography, business
Abstract

International audience; The acoustic properties of a three-dimensional sonic crystal made of square-rod rigid scatterers incorporating a periodic arrangement of quarter wavelength resonators are theoretically and experimentally reported in this work. The periodicity of the system produces Bragg band gaps that can be tuned in frequency by modifying the orientation of the square-rod scatterers with respect to the incident wave. In addition, the quarter wavelength resonators introduce resonant band gaps that can be tuned by coupling the neighbor resonators. Bragg and resonant band gaps can overlap allowing the wave propagation control inside the periodic resonant medium. In particular, we show theoretically and experimentally that this system can produce a broad frequency band gap exceeding two and a half octaves (from 590 Hz to 3220 Hz) with transmission lower than 3%. Finite element methods were used to calculate the dispersion relation of the locally resonant system. The visco-thermal losses were accounted for in the quarter wavelength resonators to simulate the wave propagation in the semi-infinite structures and to compare the numerical results with the experiments performed in an echo-free chamber. The simulations and the experimental results are in good agreement. This work motivates interesting applications of this system as acoustic audible filters.

Published
2016

38. Discussion on the interpretation of the effective wavenumber for coherent multiple scattering problem

Author

Loïc Le Marrec, Grégory Futhazar, Mathieu Chekroun, Bruno Lombard, Joel Piraux, Institut de Recherche Mathématique de Rennes ( IRMAR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -AGROCAMPUS OUEST-École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National des Sciences Appliquées ( INSA ) -Université de Rennes 2 ( UR2 ), Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Ondes et Imagerie ( O&I ), Laboratoire de Mécanique et d'Acoustique [Marseille] ( LMA ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ) -Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ), Institut de Recherche Mathématique de Rennes (IRMAR), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Ondes et Imagerie (O&I), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Lombard, Bruno, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

39. Sub-nanosecond laser ultrasonics in micro-layers of liquids

Author

Chigarev , Nikolay, Tournat , Vincent, Gusev , Vitaly, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Société Française d'Acoustique, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), and System, HAL

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Laser ultrasonics, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph]
Abstract

International audience; The study of the acoustic properties of liquid micro-layers is necessary for biological and micro-technological applications. Laser ultrasonic technique on the basis of sub-nanosecond pump laser [Appl. Phys. Lett. 93, 181905 (2008)] provides unique opportunity for the contactless and non-destructive evaluation of the materials at spatial scales from micrometer to few tens of micrometers. Here we report on the application of this technique for the study of acoustic properties of liquid layers of micrometric thickness confined between two parallel glass plates. The acoustic pulses are excited by the absorption of a pump laser pulse in a nanometric aluminium film deposited on one of the plates and are detected by photo-deflection technique. Transient photo-acoustic signals are measured at different separation distances between pump and probe beam spots. Then, this information is used for plotting the dispersion curves [Phys. Rev. Lett. 100, 158003 (2008)]. Numerous acoustic modes have been detected and their physical nature has been explained with the help of the developed theoretical models. The opportunities to extract from the evaluated dispersion curves the information on the elastic and inelastic properties of the liquids and to characterize the adhesion of liquid layer to the surrounding solid are discussed.

Published
2012

40. Directional asymmetry of the nonlinear wave phenomena in a 3-dimensional phononic granular crystal under gravity

Author

Merkel, Aurélien, Tournat, Vincent, Goussev, Vitali, Universidad de Chile, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Société Française d'Acoustique, Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Granular phononic crystal, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Asymmetry, Nonlinear
Abstract

International audience; A periodic ordered structure of monodisperse spherical beads forms a granular phononic crystal. The granular crystals combine in their dynamic behavior the effects of the geometrical periodicity (phononic effects), the rotational degrees of freedom (rotational inertia) and nonlinearities. We report the experimental observation of the asymmetry introduced by the gravity in the nonlinear transformation of acoustic waves in granular assemblages. Because of the gravity, the contact pre­-compression increases with depth inducing variations with depth of not only the linear and nonlinear elastic moduli but also of the linear and nonlinear dissipation of the acoustic waves. We show experimentally and explain theoretically that the amplitude of the self­demodulated wave (i.e., the amplitude of the wave emitted by a parametric antenna through a frequency­mixing down­ conversion process) depends in the granular media on whether the propagation of the pump waves is in the direction of the gravity or in the opposite direction. The measurements of the gravity­induced asymmetry in the nonlinear acoustic phenomena allow to compare the in­depth distributions of the contact nonlinearity and of acoustic absorption. This work is supported by project "STABINGRAM" ANR­2010­BLAN­0927­03.

Published
2012

41. Validation of a thermal compensation technique for Coda Wave Interferometry (CWI) analysis of acousto-elastic effect

Author

Zhang, Yuxiang, Abraham, Odile, Tournat, Vincent, Le Duff, Alain, Lascoup, Bertrand, Loukili, Ahmed, Grondin, Frédéric, Durand, Olivier, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), ESEO-Tech, Université Bretagne Loire (UBL), Société Française d'Acoustique, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), and PRES Université Nantes Angers Le Mans ( UNAM )

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Thermal Compensation, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Coda Wave Interferometry, Concrete
Abstract

International audience; Acousto-elastic effect is an observation of material's nonlinear elastic properties, which are sensitive to early stage damages. In a study of acousto- elasticity, stress-induced velocity variation is a key parameter for the understanding of material's mechanical behaviors and a reliable estimation of acousto-elastic coefficient. In heterogeneous material as concrete, Coda Wave Interferometry (CWI) analysis can monitor the variation of the propagation velocity with a high precision (relative resolution of $ 10^{-3}\% $), which makes it adequate for studying the acousto-elastic effect in concrete. On the other hand, as propagation velocity is also affected by temperature, the thermal-induced velocity variation causes a non-negligible bias to the CWI result of stress-induced velocity variation. In this paper we present a bias control technique for CWI analysis designed for the compensation of: 1) the thermal-induced velocity change due to environmental temperature fluctuation and 2) experimental bias resulting from entire procedures of measurement and signal processing. Its effectiveness is tested under laboratory condition by applying direct uniaxial tensile force on a concrete specimen.

Published
2012

42. Coda Wave Interferometry (CWI) for monitoring early-age cementitious mortar

Author

Zhang , Yuxiang, Abraham , Odile, Mounanga , Pierre, Leklou , Ali-Nordine, Tournat , Vincent, Le Duff , Alain, Lascoup , Bertrand, Durand , Olivier, Institut de Recherche en Génie Civil et Mécanique ( GeM ), Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ), Société Française d'Acoustique, Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and Université Bretagne Loire (UBL)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Coda Wave Interferometry, Early-age Mortar
Abstract

International audience; The hardening procedure of a cement-based mortar (mixed by cement past and uni- dimension glass beams) is studied with Coda Wave Interferometry (CWI) for a hydration time between 8 and 70 hours. Due to the continuous hydration of the cement paste, the hardening procedure involves not only a fast evolution of elastic properties, but also a autogenous shrinkage which can cause local stress and risks of micro-cracking. Traditional ultrasonic method (pulse velocity measurement) can estimate the variation of elastic properties by measuring compressive-wave's propagation velocity. Coda Wave Interferometry (CWI) of multiple scattered waves gives access to a velocity variation dominated by shear- waves. On the other hand, with the confirmed observation of micro-cracks occurring around cement/glass interfaces by Scanning Electronic Microscopy (SEM), we discuss the possibility of using CWI analysis for micro-cracking detection.

Published
2012

43. Evaluation of transverse elastic properties of fibers used in composite materials by laser resonant ultrasound spectroscopy

Author

Mounier , Denis, Poilâne , Christophe, Bûcher , Cécile, Picart , Pascal, Laboratoire de recherche sur les propriétés des matériaux nouveaux (LRPMN), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Société Française d'Acoustique, Laboratoire de recherche sur les propriétés des matériaux nouveaux ( LRPMN ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), and System, HAL

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], laser ultrasonics, composite materials, vibration modes, Physics::Optics, Resonant ultrasound spectroscopy
Abstract

International audience; We evaluate the elastic properties of glass, carbon, and flax fibers that are used to manufacture composite materials. The transverse elastic properties of fibers are more difficult to measure than the longitudinal properties. But the knowledge of the transverse properties is mandatory to predict correctly the mechanical behavior of a composite material. We apply the laser resonant ultrasound spectroscopy (RUS) technique to evaluate the transverse Young modulus and Poisson ratio of fibers. The mechanical vibrations of a cross section are generated by a pulsed subnanosecond laser beam focused and shaped on the fiber as a line parallel to the fiber. The vibrations are detected optically by the probe beam of an interferometer, focused at the zone of excitation. The measured eigenfrequencies range from 5 MHz for flax fibers to 500 MHz for carbon and glass fibers. Using finite element modeling, the eigenmodes of fibers are identified and the mechanical properties of the fiber materials are evaluated. The transverse elastic properties of carbon fibers are significantly different from the longitudinal properties. For flax fibers, the strong damping of modes which is observed could explain the strong damping of flax fiber reinforced polymers.

Published
2012

44. Elastic waves in phononic granular membranes

Author

Pichard, Hélène, Duclos, Aroune, Groby, Jean-Philippe, Tournat, Vincent, Goussev, Vitali, Laboratoire de Mecanique des Fluides et d'Acoustique ( LMFA ), École Centrale de Lyon ( ECL ), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Société Française d'Acoustique, Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and System, HAL

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph]
Abstract

International audience; Elastic membranes composed of a few number of interacting articles/nanoparticles or grains layers can be encountered in different applications including sensors and filters for the individual molecules. Membranes, which are constructed through spatially periodic assembling of particles, exhibit phononic properties, interesting in view of the possible nondestructive testing of these membranes or in view of their applications to control elastic waves propagation. Some results on the elastic properties of multilayered phononic granular membranes, where each particle possesses up to 3 translational and 3 rotational degrees of freedom, are reported. The specific feature of granular metamaterials is known to be an efficient interaction between the shear and the rotational elastic motions of the grains, which leads to the existence of the mixed shear/rotational elastic modes [Phys. Rev. E 82, 031305 (2010)]. The influence of number of granular layers, of bending and spin rigidity of the inter-grain contacts on the phononic properties of granular membranes is analyzed.

Published
2012

45. Acoustic characterization of slow compaction dynamics in noncohesive disordered granular media

Author

Legland, Jean-Baptiste, Tournat, Vincent, Goussev, Vitali, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Société Française d'Acoustique, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and System, HAL

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Resonance Method, [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Elasticity and Dissipation, Compaction, Granular Media
Abstract

International audience; Noncohesive disordered granular media are well known to exhibit very complex behaviour when being excited by mechanical solicitations. This work presents our studies of the slow dynamics in granular media undergoing a compaction process. The characterization of slow dynamics is performed by an acoustic probing of the packing after mechanical solicitation. With this aim we have built a special setup to increase the density of the granular medium and to probe its elastic properties by the acoustic resonance method. Elastic modulus and acoustic dissipation are extracted from the frequency and the quality factor of resonances. To clarify how the contact properties between grains modify the acoustic parameters during the compaction we have also studied the influence of the temperature and the humidity on the acoustic measurements. Interpretations of the experimental observations are proposed. This work is supported by project "STABINGRAM" ANR-2010-BLAN-0927-03.

Published
2012

46. Experimental study of nonlinear acoustic waves in a granular chain

Author

Cabaret , Jérémy, Tournat , Vincent, Béquin , Philippe, Andreev , Valeriy, Gusev , Vitaly, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Lomonosov Moscow State University (MSU), Laboratoire de physique de l'état condensé (LPEC), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Société Française d'Acoustique, Laboratoire d'acoustique de l'université du Mans ( LAUM ), and Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Condensed Matter::Soft Condensed Matter, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Granular media, Nonlinear
Abstract

International audience; The nonlinear acoustic propagation is experimentally studied in a monoatomic and straight granular chain made with identical spherical beads. The interaction law between the beads is well described by the intrinsically nonlinear Hertz-Mindlin theory, leading to a nonlinear propagation of the acoustic waves. We focus here on the study of the nonlinear resonance phenomenon in a finite length granular chain. We observe dispersion in linear wave propagation associated to the periodicity of the medium, but also a dispersion of nonlinearity. Interpretations on the basis of the hysteretic contact behavior are provided for the latter phenomenon, and lead to the conclusion that under some conditions this type of medium exhibits a dominant nonlinearity of the hysteretic type.

Published
2012

47. PREDICTION OF FLOW INDUCED SOUND AND VIBRATION OF PERIODICALLY STIFFENED PLATES

Author

Laurent MAXIT, DENIS VIVIEN, Vivien DENIS, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Vibrations Acoustique (LVA), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Laboratoire Vibrations Acoustique ( LVA ), Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Université de Lyon-Institut National des Sciences Appliquées ( INSA ), centre Lyonnais d'Acoustique ( CeLyA ), Université de Lyon, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), centre Lyonnais d'Acoustique (CeLyA), and Maxit, Laurent

Subjects
Sound Spectrography, Time Factors, Acoustics and Ultrasonics, Acoustics, 02 engineering and technology, 01 natural sciences, Vibration, Physics::Fluid Dynamics, Motion, 0203 mechanical engineering, Arts and Humanities (miscellaneous), Hull, 0103 physical sciences, Pressure, Wavenumber, Astrophysics::Solar and Stellar Astrophysics, Computer Simulation, 010301 acoustics, [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Physics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Fourier Analysis, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], Numerical analysis, Numerical Analysis, Computer-Assisted, Equipment Design, Models, Theoretical, Elasticity, Numerical integration, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Boundary layer, 020303 mechanical engineering & transports, Sound, Reciprocity (electromagnetism), [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Structural acoustics
Abstract

International audience; Stiffened structures are very common in engineering applications, for instance the wing of an airplane or the pressure hull of a submarine; both are subject to an excitation due to their movement in the fluid around, namely the Turbulent Boundary Layer (TBL) excitation. For improving the knowledge about the interaction between stiffened structures and TBL, this paper deals with the modelling of infinite periodically rib-stiffened plates excited by TBL. The mathematical formulation of the problem is well established in the literature. The originality of the present work relies on the use of a reciprocity technique for evaluating the response of the plate to convected harmonic pressure waves. The present approach allows then to compute the vibro-acoustic response of the plate due to the TBL from the response of the stiffened plate to a point mechanical force and to an acoustic monopole. Results in the physical space and the wavenumber space show the filter effect of the stiffened plate and the role of the supersonic domain on the far field radiation. They allow us to interpret the influence of the periodicity of the stiffeners on the vibration and the far-field noise for plates excited by TBL.

Published
2012

48. Validation of a thermal bias control technique for Coda Wave Interferometry (CWI)

Author

Alain Le Duff, Yuxiang Zhang, Vincent Tournat, Odile Abraham, Bertrand Lascoup, Olivier Durand, Frédéric Grondin, Ahmed Loukili, PRES Université Nantes Angers Le Mans (UNAM), Matériaux, Assemblages, composites, Structures Instrumentées (IFSTTAR/COSYS/MACSI), PRES Université Nantes Angers Le Mans (UNAM)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), ESEO-GSII (GSII), ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), ESTACA, Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), École Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), L'Université Nantes Angers Le Mans ( LUNAM ), Matériaux, Assemblages, composites, Structures Instrumentées ( IFSTTAR/COSYS/MACSI ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -PRES Université Nantes Angers Le Mans ( UNAM ), Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), ESEO-GSII ( GSII ), PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut de Recherche en Génie Civil et Mécanique ( GeM ), and Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Damage detection, Acoustics and Ultrasonics, Computer science, Bias control, Acoustics, Coda Wave Interferometry, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 01 natural sciences, Coda, Environmental temperature, Nondestructive testing, 0103 physical sciences, Thermal, 010301 acoustics, Thermal compensation, 010302 applied physics, Protocol (science), [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], business.industry, Repeatability, Acoustoelasticity, Interferometry, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Concrete
Abstract

International audience; The Coda Wave Interferometry (CWI) analysis serves to monitor the variation of propagation velocity in a heterogeneous medium with high precision (10(-3)% in relative terms). In combination with acoustoelastic theory, this type of analysis offers an NDT method for stress evaluation and/or damage detection. Since the CWI method is intended to evaluate extreme levels of accuracy, the presence of bias under certain circumstances can undermine evaluation results and/or test repeatability. In this paper, we offer a bias control technique involving the use of a second (reference) specimen for CWI analysis that is designed to compensate: (1) the thermally-induced velocity variation due to environmental temperature fluctuations; and (2) bias originating from experimental procedures. The presentation of this technique contains both a theoretical analysis and experimental protocol for the purpose of implementation. Furthermore, comparisons of experimental results have been included in order to demonstrate the utility of this bias control technique under laboratory conditions.

Published
2012

49. Crista acustica in insect ears modeled by an inhomogenous granular chain

Author

Delevoye , Elisabeth, Tournat , Vincent, System, HAL, Société Française d'Acoustique, Laboratoire d'Electronique et des Technologies de l'Information ( CEA-LETI ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Grenoble Alpes [Saint Martin d'Hères], Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'Acoustique de l'Université du Mans (LAUM), and Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph]
Abstract

International audience; Insect ears are found on the thorax (in some Hemiptera), the abdomen (in grasshoppers, cicadas, some moths), or the front tibia (in crickets, katydids). Crista acustica -also named Siebold's organs- is the sensory organ linked to tympanum when located in forelegs. It is a collection of individually-tuned scolopidia -the most fundamental unit of mechanoreceptor organs in insects- that can discriminate frequencies. A remarkable geometrical property of the arrangement of the soma or cell body of hearing sensing cells -the inner hair cells in the cochlea of mammals and human beings and the scolopidia in the hearing organs of invertebrates- has not yet been explored. We will focus on the arrangement of the cells of the scolopidia of crista acustica in the fore tibia of certain Orthoptera (eg, grasshoppers, crickets, katydids). It consists of a collection of perfectly aligned sensory cells which forms a crest on top of a hollow tracheal tube behind the tympanum. Such a crest can interestingly be modeled as an inhomogenous granular chain linked to a substrate. We will show that the dynamical response in both time and frequency domains of this neurally tunable chain also strongly depends on its anatomical pre-arrangement.

Published
2012

50. Multiple scattering of elastic waves: a time-domain numerical method to compute the effective wavenumbers

Author

Mathieu Chekroun, Loïc Le Marrec, Bruno Lombard, Joel Piraux, Lombard, Bruno, Laboratoire d'acoustique de l'université du Mans ( LAUM ), Le Mans Université ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Recherche Mathématique de Rennes ( IRMAR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -AGROCAMPUS OUEST-École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National des Sciences Appliquées ( INSA ) -Université de Rennes 2 ( UR2 ), Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Ondes et Imagerie ( O&I ), Laboratoire de Mécanique et d'Acoustique [Marseille] ( LMA ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ) -Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Institut de Recherche Mathématique de Rennes (IRMAR), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Ondes et Imagerie (O&I), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

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