Damage detection based on sparse virtual element boundary measurement with enhanced noise immunity under weak formulation

Chao Zhang, Li Cheng, Jinhao Qiu

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

Abstract

The recently proposed 'Weak' formulation of the Pseudo-Excitation (PE) approach was shown to exhibit high noise tolerant ability along with a number of appealing features for identifying structural damages in a thin-walled structure. However, the method requires the dense displacement field measurement in the inspection region. To tackle the problem, a 'weak' formulation based on virtual element boundary measurement (VEBM) is proposed in this paper. By dividing the entire structure into several 'virtual elements' and tuning the frequency to the natural frequency of the 'virtual element', VEBM allows reliable damage detection by using only a small number of measurement points at the virtual element boundary. The effectiveness of the VEBM was validated numerically and experimentally using a cantilever beam containing a small damaged zone. Results demonstrated that VEBM was able to achieve good detection results by using a small number of measurement points, whist providing enhanced noise immunity capability against measurement uncertainties.
Original languageEnglish
Title of host publication2015 International Conference on Noise and Fluctuations, ICNF 2015
PublisherIEEE
ISBN (Electronic)9781467383356
DOIs
Publication statusPublished - 2 Oct 2015
EventInternational Conference on Noise and Fluctuations, ICNF 2015 - Xian, China
Duration: 2 Jun 20156 Jun 2015

Conference

ConferenceInternational Conference on Noise and Fluctuations, ICNF 2015
Country/TerritoryChina
CityXian
Period2/06/156/06/15

Keywords

  • Damage Detection
  • Noise Immunity Capability
  • Pseudo-Excitation Approach

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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