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PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Research on the Hunting Instability criteria for High Speed Vehicles
L. Wei, J. Zeng and R. Luo
Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu, China
L. Wei, J. Zeng, R. Luo, "Research on the Hunting Instability criteria for High Speed Vehicles", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 21, 2014. doi:10.4203/ccp.104.21
Keywords: instability criteria, safety assessment, worn profile, stability test.
This paper focuses on the research of hunting instability criteria for two bifurcation types of vehicles. Firstly, the influence of track excitations on bifurcation graph is considered and a method of applying track excitation added with lateral impulse is proposed. Then, According to various criteria including the amplitude of limit cycles, RMS value of bogie frame acceleration and RMS value of the sum of guiding force, the hunting instability assessment is compared. The safety assessment of two vehicles after limit cycle instability is conducted. Thus, the safety domain of two vehicles can be determined respectively. Besides, the hunting instability and running safety assessment for worn wheel profile vehicles are also studied. Finally, the stability tests on full scale roller rig are conducted to compare different criteria and validate the simulation result.
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