Analysis of the influence of railway vehicle’s mass on the hunting stability

被引：0

作者：

Hu Z. ^{[1
]}

Chi M. ^{[1
]}

Zhou Y. ^{[1
]}

Cai W. ^{[2
]}

机构：

[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu

[2] School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu

来源：

Journal of Railway Science and Engineering | 2023年 / 20卷 / 06期

关键词：

hunting stability; mass; motion-mode energy method; railway vehicle; self-excited input energy;

D O I：

10.19713/j.cnki.43-1423/u.T20221118

中图分类号：

学科分类号：

摘要：

Due to the differences of bogie structure and part arrangement, the component of vehicle’s mass is different. To study the influence of unsprung mass, the mass between primary suspension and secondary suspension and the sprung mass on the hunting stability of railway vehicles, the linear differential equation of the lateral vehicle dynamics model with 21 degree of freedoms was derived, in which the Maxwell model was considered. The critical velocity of the vehicle system was determined using the minimum damping ratio method based on the stability criteria of the eigenvalues. A stability analysis technique based on the self-excited input energy method for the wheel-rail system of multi-degree of freedom railway vehicles was proposed by combining the self-excited input energy method of wheelset hunting motion and the Motion-mode energy method. This technique was utilized to study the influence of vehicle’s mass on the self-excited input energy of the system. The greater the self-excited input energy is, the worse the hunting motion stability is. Finally, the simulation software program SIMPACK® was adopted to solve the nonlinear critical velocity of vehicle system by asymptotical stability method. The accuracy of the minimum damping ratio method and the self-excited input energy method for multi-degree-of-freedom wheel-rail system was verified by the simulation results. The influence of vehicle parameters on hunting motion stability was studied. The results indicate that decreasing the unsprung mass or the mass between primary suspension and secondary suspension can improve partly the vehicle stability, while the sprung mass has a minimum effect on the vehicle stability. When the wheelset and frame mass increased by 1 000 kg, the critical velocity would reduce by 19% and 9%, and the self-excited input energy would increase by 91.7% and 32%, respectively. When the wheelset and frame mass reduced by 1 000 kg, the critical velocity would improve by 36% and 10.9%, and the self-excited input energy would reduce by 33.8% and 21.9%, respectively. The unsprung mass shows greater influence on the vehicle stability than the mass between primary suspension and secondary suspension. © 2023, Central South University Press. All rights reserved.

引用

页码：2294 / 2303

页数：9

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