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

doi:10.3969/j.issn.1000-1093.2015.06.019

Abstract

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

CLC Number:

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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