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ÎÄÕ±àºÅ£º1006-0316 (2023) 06-0031-09

Research on the Influence of Driving System on Wheel-Rail Dynamic Characteristics under Wheel Wear

ZHAN Xuhe1£¬LIU Lin1£¬JIN Xiao1£¬ZHI Yunsheng2£¬ZHOU Ziwei2

( 1.National Innovation Center of High Speed Train, Qingdao 266111, China; 2.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )

Abstract: As a common type of wheel damage in rail vehicles, abnormal wheel wear poses a huge challenge to the safe operation of trains and seriously affects the high-quality development of rail transportation. At the same time, its formation mechanism and key influencing factors have long plagued railway researchers. As the key device for the transmission of traction power in rail vehicles, the drive and transmission system, as the excitation source and excitation transmission path, participate in the coupled vibration of the vehicle, especially the torsional vibration, which significantly affects the wheel-rail dynamic interaction. ignored factors. Based on the modal superposition method and the multi-body dynamics theory, and considering the flexible wheel, this paper establishes the rigid-flexible coupled vehicle dynamics model considering the drive and transmission system and without considering the drive and transmission system respectively. Through the wear model established by the combination of FaStrip and USFD, the influence of the drive and transmission system on the wheel-rail dynamic contact characteristics under the influence of wheel wear is analyzed. The research results show that the drive and transmission system play a significant role in promoting the development of wheel wear, and thus have a significant impact on the dynamic response of the wheel-rail contact. Especially after considering the drive and transmission system, the pitch mode of the flexible wheel gear is easily excited along with the lateral bending of the wheelset, and the influence on the lateral creep rate of the wheel and rail is much greater than that on the longitudinal creep rate and the spin creep rate. influences. Therefore, the influence of the drive and transmission system should be considered in the analysis of the wheel wear mechanism and the excitation calculation.

Key words£ºwheel wear£»drive system£»flexible wheels£»rigid-flexible coupling£»wheel-rail contact characteristics

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