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

Quankun Li, Rui Wang, Mingfu Liao, Bin Shi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationAdvances in Applied Nonlinear Dynamics, Vibration and Control - 2021 - The proceedings of 2021 International Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021
EditorsXingjian Jing, Hu Ding, Jiqiang Wang
PublisherSpringer Science and Business Media Deutschland GmbH
Pages100-112
Number of pages13
ISBN (Print)9789811659119
DOIs
StatePublished - 2022
EventInternational Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021 - Hong Kong, Hong Kong
Duration: 23 Aug 202125 Aug 2021

Publication series

NameLecture Notes in Electrical Engineering
Volume799 LNEE
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119

Conference

ConferenceInternational Conference on Applied Nonlinear Dynamics, Vibration and Control, ICANDVC 2021
Country/TerritoryHong Kong
CityHong Kong
Period23/08/2125/08/21

Keywords

  • Crack diagnosis
  • Rotating machinery
  • Shaft crack
  • Transmissibility function

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