An investigation on vibration-based damage detection in circular plates

I. Trendafilova, D. G. Gorman, E. Manoach

Research output: Contribution to journalArticle

12 Citations (Scopus)
92 Downloads (Pure)

Abstract

This study aims at the development of vibration-based health monitoring (VHM) methodology for thin circular plates. The possibility of using the first several natural frequencies of a circular plate for damage detection purposes is investigated first. The study then suggests a damage detection method, which considers a vibrating plate as a dynamic system and uses its time domain response represented in a new phase (state) space to extract damage sensitive characteristics. The paper introduces the idea of using large amplitude vibrations and nonlinear time series analysis for damage detection purposes. The suggested damage detection approach explores the possibility to use certain characteristics of the distribution of phase space points on the attractor of the system. It studies the histograms of this distribution and attempts to extract damage sensitive features. Three damage features are suggested and they are shown to detect damage at a rather low level using a finite element model of the plate. The method suggested is rather generic and permits development and application to more complex structures and real data.
Original languageEnglish
Pages (from-to)291-302
Number of pages12
JournalStructural Health Monitoring
Volume8
Issue number4
DOIs
Publication statusPublished - Jul 2009

Keywords

  • vibration-based health monitoring
  • damage detection
  • structural vibrations
  • nonlinear dynamics
  • state space

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