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PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Braking Simulation of a High-Speed Railway Vehicle in Low Adhesion Conditions
H.J. Zhang, H.Y. Wang, Z.F. Wen and X.S. Jin
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, China
H.J. Zhang, H.Y. Wang, Z.F. Wen, X.S. Jin, "Braking Simulation of a High-Speed Railway Vehicle in Low Adhesion Conditions", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 311, 2014. doi:10.4203/ccp.104.311
Keywords: adhesion, brake, railway vehicle dynamics, high-speed railway, anti-slip, dynamic simulation.
In this study, a multi-body dynamic model of a high-speed railway vehicle including an anti-slip control system is built to study the braking performance of the high-speed vehicle under low wheel/rail adhesion conditions. A high-speed vehicle model is established using the structures and parameters of a high-speed vehicle in service. The wheel/rail adhesion is determined using an adhesion model that can well describe the wheel/rail adhesion near the adhesion limit. A logic gate anti-slip control is used in the braking control model for its robustness. Co-simulation of a vehicle dynamic model and anti-slip control model is conducted to study the braking performance of the high-speed vehicle. Simulation results show that the static coefficient of friction (COF) has a large effect on the braking performance of a high-speed vehicle when the static COF is below 0.1. When the COF is larger than 0.1, an increasing adhesion level does not improve the braking performance. Both factors KA and KS from Polach adhesion model, which can influent the characteristic of adhesion curve, have little effect on the braking performance.
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