Influence of Wheel Wear on Wheel-Rail Contact Relationship and Vehicle Dynamic Performance of High-Speed EMU

被引：0
|
作者：
Sun L. [1 ]
Li X. [2 ]
Hu X. [1 ]
Chang C. [2 ]
Cheng D. [1 ]
Zhou C. [1 ]
机构：
[1] Railway Science and Technology Research and Development Center, China Academy of Railway Sciences Corporation Limited, Beijing
[2] Bogie Developing Department of the Center of Rolling Stock Engineering Research, CRRC Changchun Railway Vehicles Co., Ltd., Changchun
来源：
| 1600年 / Chinese Academy of Railway Sciences卷 / 41期
关键词：
Critical speed; EMU; Equivalent conicity; Limit cycle bifurcation; Vehicle dynamics; Wheel wear; Wheel-rail contact relationship;
D O I：
10.3969/j.issn.1001-4632.2020.06.13
中图分类号：
学科分类号：
摘要：
Based on the tracking test results of 64 wheel profiles of 8 wheels from the head car of an EMU operated on Beijing-Shanghai high-speed railway as well as the bogie and carbody acceleration of the same car within one wheel reprofiling cycle, the dynamic model of this high-speed vehicle was established and verified. How the wheel/rail nonlinear characteristics change with the operation distance after wheel reprofiling, such as the distribution of wheel-rail contact points, the equivalent conicity function and the wheel-rail contact bandwidth, were studied in the case that the measured wheel profiles matching with the rail measured profile. The nonlinear stability and limit cycle analysis methods of hunting instability were used to analyze the influence of wheel wear on the hunting stability of vehicle from the aspects of the critical hunting speed, the bifurcation form of limit cycle and hunting instability frequency. Results show that the wheel wear rate, equivalent conicity and wheel-rail contact bandwidth all show nonlinear relationship with the change of operation distance after wheel reprofiling. With the increase of operation distance after wheel reprofiling, the critical hunting speed of vehicle generally shows a downward trend. For LMB10 profile, when the operation distance after wheel reprofiling increases to 147 000 km, the combination characteristics of the supercritical and subcritical bifurcation behavior of vehicle hunting instability appear. When the operation distance after wheel reprofiling increases to 206 000 km, the equivalent conicity function shows obvious negative conicity characteristics, the maximum values of bogie lateral acceleration and derailment ratio increase slightly, the wheel/rail lateral force increases obviously than that of the mid-term of wheel reprofiling cycle. And the hunting instability limit cycle of the vehicle shows a typical supercritical bifurcation characteristic. © 2020, Editorial Department of China Railway Science. All right reserved.
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页码：117 / 126
页数：9
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