基于非线性输出频率响应函数的多裂纹转子故障诊断方法研究

doi:10.3969/j.issn.1000-1093.2015.06.019

兵工学报 ›› 2015, Vol. 36 ›› Issue (6): 1096-1103.doi: 10.3969/j.issn.1000-1093.2015.06.019

基于非线性输出频率响应函数的多裂纹转子故障诊断方法研究

李志农, 杜宜光, 肖尧先

(南昌航空大学航空制造工程学院, 江西南昌 330063)

收稿日期:2014-09-09 修回日期:2014-09-09 上线日期:2015-08-03
通讯作者: 李志农 E-mail:lizhinong@tsinghua.org.cn
作者简介:李志农（1966—）男，教授
基金资助:
国家自然科学基金项目（51265039、51075372、 50775208）

Fault Diagnosis Method of Rotor System with Multi-crack Based on Nonlinear Output Frequency Response Function

LI Zhi-nong, DU Yi-guang, XIAO Yao-xian

(School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China)

Received:2014-09-09 Revised:2014-09-09 Online:2015-08-03
Contact: LI Zhi-nong E-mail:lizhinong@tsinghua.org.cn

摘要/Abstract

摘要： 相对单条转子裂纹的故障诊断，多条裂纹的故障诊断更复杂，也更困难。以两条裂纹为例，将非线性输出频率响应函数(NOFRF)引入到具有两条裂纹转子系统的故障诊断中，提出了一种基于NOFRF的多裂纹转子故障诊断新方法，并且对比分析了两条裂纹不同夹角、不同裂纹深度下NOFRF值的变化情况。实验结果表明，NOFRF值对裂纹故障具有很高的敏感性，根据 NOFRF值的变化情况，不仅能反映转子系统裂纹是否存在，还能反映两条裂纹之间的夹角、裂纹深度的变化情况。因此，利用NOFRF值，可以有效地监测转子系统中多条裂纹故障。

关键词: 动力机械工程, 非线性输出频率响应函数, 裂纹转子, 故障诊断, 裂纹夹角, 裂纹深度

Abstract: The fault diagnosis of rotor system with multi-crack is more complex and more difficult than the fault diagnosis of rotor system with single crack. The nonlinear output frequency response function (NOFRF) is introduced to fault diagnosis of rotor system with two cracks, and a fault diagnosis method of rotor system with two cracks based on the NOFRF is proposed. The NOFRF values of two cracks with different crack angles and crack depths are compared. The experimental results show that the NOFRF values are very sensitive to different crack angles and different crack depths, and the existence of rotor crack fault and the variation of crack angle and crack depth can be reflected by the NOFRF values. Therefore, the sensitivity of the NOFRF values to the crack fault can be effectively used for the detection of a rotor system with multi-cracks.

Key words: power machinery engineering, nonlinear output frequency response function, cracked rotor, fault diagnosis, crack angle, crack depth

中图分类号:

李志农, 杜宜光, 肖尧先. 基于非线性输出频率响应函数的多裂纹转子故障诊断方法研究[J]. 兵工学报, 2015, 36(6): 1096-1103.

LI Zhi-nong, DU Yi-guang, XIAO Yao-xian. Fault Diagnosis Method of Rotor System with Multi-crack Based on Nonlinear Output Frequency Response Function[J]. Acta Armamentarii, 2015, 36(6): 1096-1103.

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基于非线性输出频率响应函数的多裂纹转子故障诊断方法研究

Fault Diagnosis Method of Rotor System with Multi-crack Based on Nonlinear Output Frequency Response Function

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