Locating Bolt-Loosening Faults in Structures Using a Novel Second-Order Output Spectrum based Method with a Local Tuning Approach

Quankun Li, Xingjian Jing

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


A novel second-order output spectrum (SOOS) based method with a local tuning approach (LTA) is proposed in this paper to locate multiple bolt-loosening faults in complex structures. This new method utilizes a more general multi-degree-of-freedom (MDOF) model with nonlinear components, due to not only bolt-loosening faults but also inherently existing nonlinearity in structures, to derive the SOOS of virtual beam-like structures. Through the LTA, one extra equation is given to derive the local SOOS based damage indicator. In numerical study, the results of comparison with previous methods demonstrate that the fault feature in proposed method provides more local characteristics. Hence, this novel SOOS based method gives more accurate information about the fault location and can be used as an effective and reliable nondestructive evaluation method (NDE) for the detection and location of multiple faults in complex structure with inherent nonlinearity.

Original languageEnglish
Title of host publication2019 12th Asian Control Conference, ASCC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9784888983006
Publication statusPublished - 1 Jun 2019
Event12th Asian Control Conference, ASCC 2019 - Kitakyushu-shi, Japan
Duration: 9 Jun 201912 Jun 2019

Publication series

Name2019 12th Asian Control Conference, ASCC 2019


Conference12th Asian Control Conference, ASCC 2019


  • Bolt loosening
  • Damage indicator
  • Fault location
  • Nonlinearity

ASJC Scopus subject areas

  • Computer Science Applications
  • Control and Optimization
  • Mechanical Engineering

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