Research on Stochastic Dynamical Bifurcation in Wheelset System

被引：0
|
作者：
Zhang B. [1 ,2 ]
Zhu H. [3 ]
Zeng J. [4 ]
Jiang Z. [1 ,2 ]
Chen Q. [5 ]
机构：
[1] Study & Test Center, CRRC Zhuzhou Locomotive Co., Ltd., Zhuzhou
[2] State Key Laboratory of Heavy Duty AC Drive Electric Locotive Systems Integration, Zhuzhou
[3] School of Mechatronics & Vehicle Engineering, East China Jiaotong University, Nanchang
[4] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu
[5] Hunan Vocational College of Railway Technology, Zhuzhou
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2020年 / 42卷 / 01期
关键词：
Global stochastic critical speed; Instability criterion; Largest Lyapunov exponent; Stochastic bifurcation; Stochastic stability; The stochastic averaging method;
D O I：
10.3969/j.issn.1001-8360.2020.01.004
中图分类号：
学科分类号：
摘要：
The research on stochastic bifurcation of wheelset system was performed by using the stochastic averaging method. The difference between the stochastic dynamical bifurcation of two typical subcritical and supercritical bifurcation wheelset systems was investigated. Based on the analysis of the difference between stochastic dynamical bifurcation and Hopf bifurcation, the conception of global stochastic critical speed and a new instability criterion were proposed. The results show that the random excitation has a great influence on the stability of the wheelset system. Under the action of random excitation, the critical speed of the wheelset system significantly decreases with the increase of the intensity of random excitation. The influence of random excitation on stability is relatively small when the wheelset is only subjected to the track random excitation. However, the influence cann't be ignored when the wheelset is under the strong excitation condition such as strong wind. The speed corresponding to the point of stochastic dynamical bifurcation can be regarded as the global stochastic critical speed, while the largest Lyapunov exponent method can be used as the new instability criterion method. © 2020, Department of Journal of the China Railway Society. All right reserved.
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页码：24 / 32
页数：8
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