• CN：11-2187/TH
• ISSN：0577-6686

• 特邀专栏：大国重器：复兴之路上的轨道交通技术 •

### 含外圈故障的高速列车轴承转子系统非线性动力学行为分析

1. 石家庄铁道大学机械工程学院 石家庄 050043
• 收稿日期:2017-05-02 修回日期:2017-12-20 出版日期:2018-04-20 发布日期:2018-04-20
• 作者简介:刘永强,男,1983年出生,副教授,博士研究生导师。研究方向为车辆动力学与控制、机车走行部故障诊断。E-mail:liuyq@stdu.edu.cn
• 基金资助:
国家自然科学基金（11572206，11472179，U1534204，11790280）、河北省自然科学基金（A2015210005，A2016210099）和河北省人才工程培养经费资助科研（A2016002036）资助项目。

### Nonlinear Dynamic Behaviors Analysis of the Bearing Rotor System with Outer Ring Faults in the High-speed Train

LIU Yongqiang, WANG Baosen, YANG Shaopu

1. School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043
• Received:2017-05-02 Revised:2017-12-20 Online:2018-04-20 Published:2018-04-20

Abstract: A nonlinear dynamic model of rolling element bearing in EMUs with outer ring faults is built, and the nonlinear dynamics behavior of the model is analyzed Under the normal state and failure state. The rolling element bearing in this model is a tapered one, and three nonlinear factors were considered, such as clearance of bearing, nonlinear Hertzian contact force between balls and races, and unbalance force because of the rotor eccentric mass. In order to prove the validity of the model by comparing the varying compliance(VC) frequency and outer ring fault feature frequency which are derived from the simulation and actual calculate and get the complex nonlinear dynamic response, the numerical method is used. The dynamic stability of the system is analyzed considering various rotating speed and size of faults. The system gradually deviates the steady condition and goes to chaos earlier with the bigger rotating speed and fault size. The system bifurcation and chaos characteristics is studied based on the spectrogram, phase plan, bifurcation diagrams and Poincare map, from which the roads to chaos, such as the quasi periodic motion to chaos, paroxysmal and period-doubling bifurcation, are discovered in this paper. The results of the analysis have a certain significance for the study of failure mechanism and evolution rule of train axle box bearing.