A Novel Nonlinear Transmissibility Function-Based Method for Diagnosing Shaft Cracks of Rotating Machineries

Quankun Li, Rui Wang, Mingfu Liao, Bin Shi

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

Fault diagnosis of shaft cracks plays an important role for the safety and reliability of rotating machineries such as aero-engine, turbopump, wind power generator and internal combustion turbine in modern industrial applications. In this paper, a novel method for diagnosing shaft cracks of rotating machineries based on nonlinear transmissibility function is proposed. In the new method, a nonlinear dynamic model is built to describe the nonlinear behavior of a simply supported rotor with breathing cracks and nonlinear supports (nonlinear bearing damping and stiffness coefficients). Damage features for benchmark and cracked structures are derived respectively, and damage indicator for crack diagnosis is defined as the relative change between damage features. Through two numerical studies simulated by the Matlab software, procedures of proposed method are demonstrated and method’s effectiveness and availability are verified. In the future study, the proposed nonlinear transmissibility function-based crack diagnosis method could be extended and applied for other faults in rotating machineries like unbalance, misalignment, stator-to-rotor rub and support structure looseness and so forth.

源语言英语
主期刊名Advances in Applied Nonlinear Dynamics, Vibration and Control - 2021 - The proceedings of 2021 International Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021
编辑Xingjian Jing, Hu Ding, Jiqiang Wang
出版商Springer Science and Business Media Deutschland GmbH
100-112
页数13
ISBN(印刷版)9789811659119
DOI
出版状态已出版 - 2022
活动International Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021 - Hong Kong, 香港
期限: 23 8月 202125 8月 2021

出版系列

姓名Lecture Notes in Electrical Engineering
799 LNEE
ISSN(印刷版)1876-1100
ISSN(电子版)1876-1119

会议

会议International Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021
国家/地区香港
Hong Kong
时期23/08/2125/08/21

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