Vehicle dynamic performance based on variable stiffness yaw damper

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (9) : 95-105.

HUO Wenbiao1,2, LIU Xuegang2, LI Chensheng2, LIU Zhiqiang1,WU Pingbo1

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Abstract

During the long-term service of CRH3 series high-speed EMUs, the problem of insufficient stability margin for hunting motion occasionally occurs, the vehicle is equipped with T60 yaw damper, and the frame lateral acceleration alarm problem is prone to occur at the worn wheel state. When the vehicle is equipped with T70 yaw damper, the ‘carbody hunting’ issue is easy to occur in the early stage of wheel wear or new wheels. In this paper, the simulation and experimental research of frequency selected stiffness yaw damper was carried out for the problem of carbody hunting and frame alarm, so as to meet the needs of the vehicle's hunting motion stability under different wheel-rail contact states.Dynamic simulation shows that the frequency selected stiffness yaw damper can effectively solve the problems of ‘carbody hunting’ and ‘frame alarm’. The adaptability of the frequency selected stiffness yaw damper and two high-speed treads was further analyzed, and the vehicle critical speed is higher than 350km/h when the S1002CN is used, the LMB10 tread is only 220km/h, and the stability and comfort index corresponding to the S1002CN are better than those of the LMB10. Finally, the performance of the frequency selected stiffness yaw damper is verified by the rolling vibration bench test of the whole vehicle, the results show that the frequency selected stiffness yaw damper has good dynamic performance under the wheel-rail matching conditions of low equivalent conicity, normal equivalent conicity and equivalent conicity.

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High-speed train / yaw damper / frequency selected stiffness / carbody hunting / bogie hunting / dynamic stiffness / dynamic damping

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HUO Wenbiao1,2, LIU Xuegang2, LI Chensheng2, LIU Zhiqiang1,WU Pingbo1. Vehicle dynamic performance based on variable stiffness yaw damper[J]. Journal of Vibration and Shock, 2023, 42(9): 95-105

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