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P.A. Montenegro¹, S.G.M. Neves¹, R. Calçada¹, M. Tanabe² and M. Sogabe³

¹Faculty of Engineering, University of Porto, Portugal
²Kanagawa Institute of Technology, Atsugi, Japan
³Railway Technical Research Institute, Tokyo, Japan

Keywords: wheel-rail interaction, geometric contact problem, lateral dynamics, experimental validation.

Summary

A wheel-rail contact method for analyzing the train-structure nonlinear interaction that takes into account the wheel and rail geometry is proposed in this article. The presented formulation is divided into three main parts: 1) the geometric problem consisting of the detection of the contact point and the calculation of all the geometric variables needed for determining the contact forces; 2) the normal contact problem in which the forces are determined based on the Hertz nonlinear theory; 3) the tangential contact problem in which the forces are calculated using the rolling friction laws proposed by Kalker. Most of the existing methods treat the contact forces in the normal and tangential directions as external forces, whereas the present formulation uses a contact element that takes into account the constitutive behaviour in the contact interface. The constraint equations that relate the displacements of the vehicle and structure are imposed using a direct method. The proposed method is validated using the results obtained in an experimental test consisting of a railroad car running over a rolling stock plant subjected to a lateral deviation.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 71 A Three Dimensional Train-Structure Interaction Methodology: Experimental Validation P.A. Montenegro¹, S.G.M. Neves¹, R. Calçada¹, M. Tanabe² and M. Sogabe³ ¹Faculty of Engineering, University of Porto, Portugal ²Kanagawa Institute of Technology, Atsugi, Japan ³Railway Technical Research Institute, Tokyo, Japan doi:10.4203/ccp.104.71 purchase the full-text of this paper Full Bibliographic Reference for this paper , "A Three Dimensional Train-Structure Interaction Methodology: Experimental Validation", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 71, 2014. doi:10.4203/ccp.104.71 Keywords: wheel-rail interaction, geometric contact problem, lateral dynamics, experimental validation. Summary A wheel-rail contact method for analyzing the train-structure nonlinear interaction that takes into account the wheel and rail geometry is proposed in this article. The presented formulation is divided into three main parts: 1) the geometric problem consisting of the detection of the contact point and the calculation of all the geometric variables needed for determining the contact forces; 2) the normal contact problem in which the forces are determined based on the Hertz nonlinear theory; 3) the tangential contact problem in which the forces are calculated using the rolling friction laws proposed by Kalker. Most of the existing methods treat the contact forces in the normal and tangential directions as external forces, whereas the present formulation uses a contact element that takes into account the constitutive behaviour in the contact interface. The constraint equations that relate the displacements of the vehicle and structure are imposed using a direct method. The proposed method is validated using the results obtained in an experimental test consisting of a railroad car running over a rolling stock plant subjected to a lateral deviation. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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