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Keywords: train-track interaction, train dynamics, finite element modelling, rail acceleration.

Summary

This paper focuses on the modelling of a vehicle-track-substructure dynamic system using the finite element (FE) tool ABAQUS and an MBS code GENSYS. The contact force and contact patch from the MBS simulation are used as input file in the FE simulation. The refined simulation of the track dynamics is realised using the FE model of a track representation. Based on the FE model, vibration analysis of the rail has been studied. Considering different kinds of track structure, track irregularity conditions and train speeds, the range of the rail acceleration was identified and is discussed in this paper. Rail acceleration decayed from rail head to rail foot, and the maximum value appeared in the rail head. The acceleration of the rail head is most sensitive to the variant of load, speed, track structure and position of test section. For a ballasted track with operation speed increasing from 100 km/h to 160km/h, the accelerations of the rail head increase from 737 m/s² to 1000 m/s². For a slab track with a travel speed increasing from 200 km/h to 350 km/h, the rail head acceleration increases from 1476 m/s² to 2980 m/s². The outcome of the study, presented in this paper, provides guidance for sensor locations for continuous monitoring of railway track conditions in the field.

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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: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 275 Detection of Acceleration Sensitive Areas of Rail using a Dynamic Analysis X.P. Cai^1,2 and E. Kassa¹ ¹Department of Civil and Transport Engineering, Norwegian University of Science and Technology, Trondheim, Norway ²School of Civil Engineering, Beijing Jiaotong University, China doi:10.4203/ccp.110.275 purchase the full-text of this paper Full Bibliographic Reference for this paper X.P. Cai, E. Kassa, "Detection of Acceleration Sensitive Areas of Rail using a Dynamic Analysis", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 275, 2016. doi:10.4203/ccp.110.275 Keywords: train-track interaction, train dynamics, finite element modelling, rail acceleration. Summary This paper focuses on the modelling of a vehicle-track-substructure dynamic system using the finite element (FE) tool ABAQUS and an MBS code GENSYS. The contact force and contact patch from the MBS simulation are used as input file in the FE simulation. The refined simulation of the track dynamics is realised using the FE model of a track representation. Based on the FE model, vibration analysis of the rail has been studied. Considering different kinds of track structure, track irregularity conditions and train speeds, the range of the rail acceleration was identified and is discussed in this paper. Rail acceleration decayed from rail head to rail foot, and the maximum value appeared in the rail head. The acceleration of the rail head is most sensitive to the variant of load, speed, track structure and position of test section. For a ballasted track with operation speed increasing from 100 km/h to 160km/h, the accelerations of the rail head increase from 737 m/s² to 1000 m/s². For a slab track with a travel speed increasing from 200 km/h to 350 km/h, the rail head acceleration increases from 1476 m/s² to 2980 m/s². The outcome of the study, presented in this paper, provides guidance for sensor locations for continuous monitoring of railway track conditions in the field. purchase the full-text of this paper (price £22) 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 £85 +P&P)
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