Effect of Hollow Worn Tread of Electric Multiple Units on Vehicle Stability
WANG Chen1, LUO Shihui1, WU Pingbo1, XU Ziqiang2, MA Weihua1, FANG Wengwu3
1. Traction Power State Key Laboratory，Southwest Jiaotong University，Chengdu 610031，China; 2. China Academy of Railway Sciences，Locomotive Car Research Institute，Beijing 100081，China; 3. CRRC Qishuyan Institute Co.，Ltd.，Changzhou 213011，China
Abstract：To solve the issue of frame lateral instability alarm of high-speed EMU (electric multiple units) in the running process，a vehicle dynamics model considering hollow worn tread was established. The wheel-rail relationship between worn treads of different running distance and rail as well as the influence of hollow worn tread on vehicle stability were researched used theoretical analysis，simulation analysis and field tests.The calculation results show that the contact points between turning tread and rail are in uniform distribution. However，for hollow wear tread，contact points distributed on both sides of the depression area. The“False flange effect”initiated by leap metastases of contact point caused severe lateral wheel/rail impact. While the vehicle running at high speed，the lateral vibration frequency is close to the natural vibration frequency of the frame itself，which would induce lateral coupled vibration of bogie and exceed the limit criteria. Through simulation analysis and field test discover hollow worn tread is an important indication for frame lateral alarm. Using wheel re-profiling can improve lateral stability of bogie.
王晨, 罗世辉, 邬平波, 许自强, 马卫华, 方翁武. 动车组踏面凹型磨耗对车辆稳定性的影响[J]. 西南交通大学学报, 2021, 56(1): 84-91.
WANG Chen, LUO Shihui, WU Pingbo, XU Ziqiang, MA Weihua, FANG Wengwu. Effect of Hollow Worn Tread of Electric Multiple Units on Vehicle Stability. Journal of SouthWest JiaoTong University, 2021, 56(1): 84-91.
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