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13 results on '"Torstensson, P T"'

1. Hybrid Model for Prediction of Impact Noise Generated at Railway Crossings

Author

Torstensson, P. T., Squicciarini, G., Krüger, M., Nielsen, Jens C. O., Thompson, David J., Schröder, Wolfgang, General editor, Boersma, Bendiks Jan, Series Editor, Fujii, Kozo, Series Editor, Haase, Werner, Series Editor, Hirschel, Ernst Heinrich, Founded by, Leschziner, Michael A., Series Editor, Periaux, Jacques, Series Editor, Pirozzoli, Sergio, Series Editor, Rizzi, Arthur, Series Editor, Roux, Bernard, Series Editor, Shokin, Yurii I., Series Editor, Anderson, David, editor, Gautier, Pierre-Etienne, editor, Iida, Masanobu, editor, Nelson, James T., editor, Thompson, David J., editor, Tielkes, Thorsten, editor, Towers, David A., editor, Vos, Paul de, editor, and Nielsen, Jens C. O, editor

Published
2018
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2. Investigation of Railway Curve Squeal Using a Combination of Frequency- and Time-Domain Models

Author

Pieringer, A., Torstensson, P. T., Giner, J., Baeza, L., Schröder, Wolfgang, General editor, Boersma, Bendiks Jan, Series Editor, Fujii, Kozo, Series Editor, Haase, Werner, Series Editor, Hirschel, Ernst Heinrich, Founded by, Leschziner, Michael A., Series Editor, Periaux, Jacques, Series Editor, Pirozzoli, Sergio, Series Editor, Rizzi, Arthur, Series Editor, Roux, Bernard, Series Editor, Shokin, Yurii I., Series Editor, Anderson, David, editor, Gautier, Pierre-Etienne, editor, Iida, Masanobu, editor, Nelson, James T., editor, Thompson, David J., editor, Tielkes, Thorsten, editor, Towers, David A., editor, Vos, Paul de, editor, and Nielsen, Jens C. O, editor

Published
2018
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3. Rail Corrugation Growth on Curves – Measurements, Modelling and Mitigation

Author

Torstensson, P. T., Nielsen, J. C. O., Boersma, Bendiks Jan, Series editor, Fujii, Kozo, Series editor, Haase, Werner, Series editor, Leschziner, Michael A., Series editor, Periaux, Jacques, Series editor, Pirozzoli, Sergio, Series editor, Rizzi, Arthur, Series editor, Roux, Bernard, Series editor, Shokin, Yurii I., Series editor, Nielsen, Jens C.O., editor, Anderson, David, editor, Gautier, Pierre-Etienne, editor, Iida, Masanobu, editor, Nelson, James T., editor, Thompson, David, editor, Tielkes, Thorsten, editor, Towers, David A., editor, and de Vos, Paul, editor

Published
2015
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4. High-Frequency Vertical Wheel–Rail Contact Forces at High Vehicle Speeds –The Influence of Wheel Rotation

Author

Torstensson, P. T., Nielsen, J. C. O., Baeza, L., Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Shokin, Yurii I., editor, Maeda, Tatsuo, editor, Gautier, Pierre-Etienne, editor, Hanson, Carl E., editor, Hemsworth, Brian, editor, Nelson, James Tuman, editor, Schulte-Werning, Burkhard, editor, Thompson, David, editor, and de Vos, Paul, editor

Published
2012
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9. An iterative methodology for the prediction of dynamic vehicle–track interaction and long-term periodic rail wear

Author

Carlberger, Andreas, Torstensson, Peter T, Nielsen, Jens CO, and Frid, Anders

Abstract

In this study, a versatile numerical method for the prediction of long-term growth of rail roughness is presented and its functionality is demonstrated for the development of rail corrugation on small radius curves. The procedure includes two sub-modules: (1) a time-domain model for the simulation of dynamic vehicle–track interaction in a wide range of frequencies by using a commercial software for multibody dynamics and (2) a post-calculation of sliding wear based on the Archard’s model in combination with a non-Hertzian and transient wheel–rail contact model. The structural flexibility of the wheelset is accounted for by using the finite element method. The rail wear generated by a large number of passing trains is assessed by recurrently updating the rail surface based on the wear depth calculated in each post-processing step. The current work sets out from a previous study in which a model for the prediction of long-term growth of rail roughness on small radius curves was developed in a general-purpose programming language. By transferring the model into a commercial software, the aim is to develop an engineering tool that is more applicable for different operational conditions, such as various vehicle and track designs and track alignments. The proposed method is verified by comparing the simulation results against those obtained with the pre-existing software. Conditions similar to a 120 m radius curve on the Stockholm metro exposed to corrugation growth on the low rail are considered. The corrugation is found to be generated by the leading wheelsets. The prevailing wavelength-fixing mechanisms are identified and discussed.

Published
2018
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10. Dynamic train-track interaction at high vehicle speeds-Modelling of wheelset dynamics and wheel rotation

Author

Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials, Ministerio de Ciencia e Innovación, Torstensson, P. T., Nielsen, J. C. O., Baeza González, Luis Miguel, Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials, Ministerio de Ciencia e Innovación, Torstensson, P. T., Nielsen, J. C. O., and Baeza González, Luis Miguel

Abstract

[EN] Vertical dynamic traintrack interaction at high vehicle speeds is investigated in a frequency range from about 20 Hz to 2.5 kHz. The inertial effects due to wheel rotation are accounted for in the vehicle model by implementing a structural dynamics model of a rotating wheelset. Calculated wheelrail contact forces using the flexible, rotating wheelset model are compared with contact forces based on rigid, non-rotating models. For a validation of the traintrack interaction model, calculated contact forces are compared with contact forces measured using an instrumented wheelset. When the system is excited at a frequency where two different wheelset mode shapes, due to the wheel rotation, have coinciding resonance frequencies, significant differences are found in the contact forces calculated with the rotating and non-rotating wheelset models. Further, the use of a flexible, rotating wheelset model is recommended for load cases leading to large magnitude contact force components in the high-frequency range (above 1.5 kHz). In particular, the influence of the radial wheel eigenmodes with two or three nodal diameters is significant. © 2011 Elsevier Ltd.

Published
2011

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