Nonlinear dynamic analysis of misalignment-Rub-impact coupling fault of rolling bearing rotor system

被引：0
|
作者：
Zhen M. [1 ,2 ]
Sun T. [1 ]
Tian Y. [1 ]
Zhang H. [1 ,2 ]
Tan C. [1 ,2 ]
机构：
[1] Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 07期
关键词：
Coupling fault; Misalignment; Rolling bearing; Rubbing;
D O I：
10.13465/j.cnki.jvs.2020.07.020
中图分类号：
学科分类号：
摘要：
In order to obtain the dynamic characteristics of rotor system under misalignment-rubbing coupling fault, the nonlinear dynamic differential equation of rolling bearing rotor system under holonomic constraints was established by Lagrangian undetermined multiplier method. The dynamic response of the system under misalignment-rubbing coupling fault was studied by Runge-Kutta numerical method. Time domain diagram, axis orbit diagram, bifurcation diagram, Poincare section diagram and FFT spectrum were used to analyze the effects of misalignment, rubbing stiffness and clearance on the vibration response of the rotor. The analysis results show that the misalignment increase will increase the vibration response of the system with 1-octave,and produce even-octave such as 2-fold and 4-fold, and the combined frequency response with VC (varying compliance) frequency at the same time. At low speed, the rubbing stiffness and clearance have little influence on the rotor system; at high speed,smaller rubbing stiffness and larger rubbing clearance would alleviate the nonlinear behavior of the system. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：140 / 147
页数：7
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