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Broadband inverted T-shaped seismic metamaterial
- Source :
- Materials and Design, Materials and Design, Elsevier, 2021, 208, pp.109906. ⟨10.1016/j.matdes.2021.109906⟩, Materials & Design, Vol 208, Iss, Pp 109906-(2021)
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Seismic metamaterials (SMs) are expected to assist or replace traditional isolation systems owing to their strong attenuation of seismic waves. In this paper, a one-dimensional inverted T-shaped SM (1D ITSM) with an ultra-wide first bandgap (FBG) is proposed. The complex band structures are calculated to analyze the wave characteristics of the surface waves in the SMs. We find that the FBG of the 1D ITSM is composed of two parts; part 1 with surface evanescent waves and part 2 with no surface modes. Similar results are found in the complex band structure of the FBG of the SM consisting of periodically arranged pillars and substrate. The propagation of seismic surface waves in the 1D ITSM is different in these two frequency ranges of the FBG. In part 1, the seismic surface waves are significantly attenuated in the 1D ITSM, while in part 2, the surface waves are converted into bulk waves. Finally, the ultra-wide FBG is verified by using a kind of the two-dimensional ITSM in large-scale field experiments.<br />30 pages,15 figures
- Subjects :
- Surface (mathematics)
Materials science
Seismic metamaterials
Field (physics)
Band gap
Relative bandwidth
Acoustics
FOS: Physical sciences
Physics::Optics
Large-scale field experiments
Applied Physics (physics.app-ph)
02 engineering and technology
010402 general chemistry
01 natural sciences
Seismic wave
General Materials Science
First bandgap
Materials of engineering and construction. Mechanics of materials
ComputingMilieux_MISCELLANEOUS
[PHYS]Physics [physics]
Mechanical Engineering
Attenuation
Metamaterial
Physics - Applied Physics
Half-space
Surface waves
021001 nanoscience & nanotechnology
0104 chemical sciences
Mechanics of Materials
Surface wave
TA401-492
0210 nano-technology
Inverted T-shaped
Subjects
Details
- Language :
- English
- ISSN :
- 02641275
- Database :
- OpenAIRE
- Journal :
- Materials and Design, Materials and Design, Elsevier, 2021, 208, pp.109906. ⟨10.1016/j.matdes.2021.109906⟩, Materials & Design, Vol 208, Iss, Pp 109906-(2021)
- Accession number :
- edsair.doi.dedup.....d22ae3d429c5c966675f08f591aab669