Dynamic characteristics of rotor⁃ball bearing system with multi coupling faults

被引：0
|
作者：
Zhong Z. [1 ]
Ma L. [1 ]
Cai Z. [1 ]
Chen J. [1 ]
Zhu C. [2 ]
机构：
[1] College of Mechanical and Control Engineering, Guilin University of Technology, Guilin
[2] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2022年 / 37卷 / 05期
关键词：
Dynamic characteristics; Features of faults; Finite element model; Multi coupling faults; Rotor⁃ball bearing system;
D O I：
10.13224/j.cnki.jasp.20220016
中图分类号：
学科分类号：
摘要：
To further study the mechanism of the rotor⁃ball bearing system with multi coupling faults, the effects of torsional stress, shear stress, gyroscopic and moment of inertia on rotating components were fully considered, Timoshenko beam elements and disk elements were used to model the finite element of a rotor system.By assembling the dynamic model of ball bearing and fault models of unbalance, misalignment, rubbing, crack and pedestal looseness, the dynamic equations of the rotor⁃ball bearing system with multi coupling faults were obtained.The displacement response of the rotor⁃ball bearing system was obtained using Runge Kutta method with variable step length, and response was analyzed using bifurcation diagrams and poincaré maps with mass speed and time⁃domain waveform, axis orbits, phase diagrams and frequency spectrum at the fault areas.Fault features and dynamic characteristics of the system were studied and explored.As a result, abundant nonlinear phenomena such as periodic motion, quasi⁃periodic motion and complex quasi⁃chaotic motion were found.Additionally, characteristics of faults such as unbalance, misalignment, rubbing, crack and pedestal looseness were indicated during each nonlinear behavior. © 2022, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：909 / 923
页数：14
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