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PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Influence of Rail Material to Corrugation on Ballastless High-Speed Railways
X.S. Yao1, L. Wu2, Y.L. Gu3, H.Y. Wang4, Z.F. Wen4 and X.S. Jin4
1School of Mechanical Engineering, Tribology Research Institute, Southwest Jiaotong University, Chengdu, China
X.S. Yao, L. Wu, Y.L. Gu, H.Y. Wang, Z.F. Wen, X.S. Jin, "Influence of Rail Material to Corrugation on Ballastless High-Speed Railways", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 119, 2014. doi:10.4203/ccp.104.119
Keywords: high speed railway, corrugation, decarburized layer, wear resistance, evolution process.
Field investigation of a high-speed railway found significant differences in corrugation growth on two sections of rails with the same track and train passage conditions. It was suspected that the difference in wear resistance of the rails caused the difference in the corrugation development. A model for the simulation of corrugation growth on ballastless high-speed railways is established to study this interesting corrugation phenomenon. The model is a vehicle-track coupled system that takes the unsprung mass, two dimensional rail/wheel rolling contact, and the ballastless track structure into consideration. A wear model and corresponding numerical algorithm are established. The effect of the wear resistance of the rail material on the development of the corrugation is studied using the established model. The simulation results show that the established model can well reproduce the corrugation found for the investigated rails. It is found that the corrugation depths show a dramatic increase with the decrease of wear resistance, which is in good accordance with field observations. Some corrugation mechanisms and details of the corrugation development are also discussed using the results of the established model.
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