Vibration characteristic and diagnosis of a cracked rotor based on energy space analysis

被引：0

作者：

Liu J. ^{[1
,2
]}

Zhang Y. ^{[1
]}

Wang C. ^{[1
]}

Zhang M. ^{[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：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 02期

关键词：

Crack fault; Cracked rotor; Energy FFT; Energy space; Energy space analysis; Energy track; Nonlinear vibration; Track distortion;

D O I：

10.11990/jheu.202008054

中图分类号：

学科分类号：

摘要：

Initial crack and propagation on a rotor are easily induced in rotating machinery because of the influences of high-speed operations, variable periods, and alternating loads on the rotor. The energy expression of the cracked rotor is derived considering the model of the cracked rotor with horizontal support, nonlinearities, and dynamic equations. The concept of energy space is introduced, and the analysis method of the vibration energy space is proposed. The vibration characteristics of the rotor are investigated in different energy spaces within varying critical speeds. The influences of different crack and nonlinear parameters on the vibration characteristics of the system are compared in energy FFT and distortion track based on the proposed concept of energy track. Related experiments verify the energy FFT and energy track of the cracked rotor. Results show that the energy FFT and the energy track distortion of the cracked rotor can be used to diagnose crack faults, which provides a new method for analyzing vibration responses and fault diagnoses of a cracked rotor system. Copyright ©2022 Journal of Harbin Engineering University.

引用

页码：243 / 254

页数：11

共 17 条

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