Computational Technology Resources - CCC

N. Pillai¹, J.-Y. Shih^1,2, R. Ambur¹ and C. Roberts¹

¹Birmingham Centre for Railway Research and Education, School of Engineering, University of Birmingham, Birmingham, United Kingdom
²Zynamic Engineering AB, Stockholm, Sweden

doi:10.4203/ccc.1.31.21

N. Pillai, J.-Y. Shih, R. Ambur, C. Roberts, "Replicating the Vehicle and Track Dynamics in Combined Multi-Body System and Finite Element Simulations for the Appropriate Analysis of Subsurface Rail Behaviour", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 31.21, 2022, doi:10.4203/ccc.1.31.21

Keywords: switch and crossing, multi-body simulation, finite element analysis, track dynamics, railway vehicle dynamics, numerical simulation.

Abstract

A combined MBS-FE simulation approach to simulating the interaction between trains and switches has been implemented. The vehicle and substructure dynamics have been replicated between the two models. For the important components that would affect the vibration of the track structure, i.e. the railpads and the ballast, the agreement for the vertical and lateral receptance between the MBS and the FE models has been ensured. The equivalent Young’s modulus has been calculated for the railpad layer and its Rayleigh damping coefficient has been obtained through sensitivity analysis. The stiffness and damping for the ballast layer has been split between the sleeper nodes. The results for the vertical and lateral rail receptance for the MBS and the FE models show a good agreement. Moreover, the vertical wheel-rail contact force and wheel-displacement have been compared for FE simulations implementing the detailed dynamics and static load. The results for the model that implemented detailed dynamics demonstrates a much better agreement with the reference, demonstrating the improvement resulting from this work.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 31.21 Replicating the Vehicle and Track Dynamics in Combined Multi-Body System and Finite Element Simulations for the Appropriate Analysis of Subsurface Rail Behaviour N. Pillai¹, J.-Y. Shih^1,2, R. Ambur¹ and C. Roberts¹ ¹Birmingham Centre for Railway Research and Education, School of Engineering, University of Birmingham, Birmingham, United Kingdom ²Zynamic Engineering AB, Stockholm, Sweden doi:10.4203/ccc.1.31.21 Full Bibliographic Reference for this paper N. Pillai, J.-Y. Shih, R. Ambur, C. Roberts, "Replicating the Vehicle and Track Dynamics in Combined Multi-Body System and Finite Element Simulations for the Appropriate Analysis of Subsurface Rail Behaviour", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 31.21, 2022, doi:10.4203/ccc.1.31.21 Keywords: switch and crossing, multi-body simulation, finite element analysis, track dynamics, railway vehicle dynamics, numerical simulation. Abstract A combined MBS-FE simulation approach to simulating the interaction between trains and switches has been implemented. The vehicle and substructure dynamics have been replicated between the two models. For the important components that would affect the vibration of the track structure, i.e. the railpads and the ballast, the agreement for the vertical and lateral receptance between the MBS and the FE models has been ensured. The equivalent Young’s modulus has been calculated for the railpad layer and its Rayleigh damping coefficient has been obtained through sensitivity analysis. The stiffness and damping for the ballast layer has been split between the sleeper nodes. The results for the vertical and lateral rail receptance for the MBS and the FE models show a good agreement. Moreover, the vertical wheel-rail contact force and wheel-displacement have been compared for FE simulations implementing the detailed dynamics and static load. The results for the model that implemented detailed dynamics demonstrates a much better agreement with the reference, demonstrating the improvement resulting from this work. download the full-text of this paper (PDF, 1114 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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