Vibration and crack propagation control for cracked asymmetric rotor based on 3-D finite element model

被引：0
|
作者：
Liu J. [1 ,2 ]
Hu R. [1 ]
Chen J. [1 ,2 ]
Wang X. [1 ,2 ]
机构：
[1] Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechanical System, Tianjin
[2] National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology, Tianjin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 23期
关键词：
3-D finite element model; Cracked asymmetric rotor; Delay crack propagation; Vibration control;
D O I：
10.13465/j.cnki.jvs.2019.23.001
中图分类号：
学科分类号：
摘要：
Aiming at vibration problems of a cracked asymmetric rotor, a 3-D finite element (FE) model for the rotor system was established using the nonlinear contact FE approach. The free interface modal synthesis method was used to reduce the model's orders and computation time. Effects of related parameters on unstable zone of main resonance and those of different crack positions on the rotor's vibration characteristics were analyzed through simulation analyses. The results showed that appearance of cracks can affect the rotor's resonance frequency and unstable zone range; electromagnetic actuator (EMA) with fuzzy-PID control can be used to realize the active control of the rotor system's vibration; based on the rotor dynamics theory and the crack open-close mapping method proposed here, effects of rotating speed, uneven mass and asymmetric rotor's flatness on rotor crack's open-close features were studied to propose the method effectively delaying crack propagation; test results reveal EMA can be used to suppress the cracked rotor's vibration and crack breathing effect, and verify the effectiveness of the proposed control method. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：1 / 9
页数：8
相关论文
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