Crack detection for a Jeffcott rotor with a transverse crack: An experimental investigation

被引：61
|
作者：
Guo, Chaozhong [1 ]
Yan, Jihong [1 ]
Yang, Weicheng [1 ]
机构：
[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin, Heilongjiang, Peoples R China
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2017年 / 83卷
基金：
中国国家自然科学基金;
关键词：
Jeffcott rotor; Breathing crack; Crack detection; Empirical mode decomposition; VIBRATION ANALYSIS; STABILITY ANALYSIS; SYSTEM; IDENTIFICATION; TRANSFORM; DYNAMICS; MODEL;
D O I：
10.1016/j.ymssp.2016.06.011
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this paper, an experimental investigation is carried out to verify the theoretical results of the dynamic behavior and the EMD based crack detection method for the cracked rotor proposed in our former research. The breathing crack in the rotor is simulated by a real fatigue crack. The whirl orbits during passage through the 1/2, 1/3 and 1/4 subcritical speeds are investigated. The dynamic responses in these subcritical speed zones are decomposed into several subcomponents by the EMD method, and the variation of the high frequency component are studied. As a comparison, the fast Fourier transform method is used to derive the amplitude variation of the high order frequencies from the frequency spectra of the experimental vibration signal. The experimental results are well concordant with the theoretical analysis, which indicates that the EMD based crack detection method is practicable. (C) 2016 Published by Elsevier Ltd.
引用
收藏
页码：260 / 271
页数：12
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