Sensitivity of fundamental mode shape and static deflection for damage identification in cantilever beams

Maosen Cao, Lin Ye, Li Min Zhou, Zhongqing Su, Runbo Bai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

48 Citations (Scopus)

Abstract

Fundamental mode shape and static deflection are typical features frequently used for identification of damage in beams. Regarding these features, an interesting question, still pending, is which one is most sensitive for use in damage identification. The present study addresses the key sensitivity of these features for damage identification in cantilever beams, wherein these features are extremely similar in configurations. The intrinsic relation between the fundamental mode shape and static deflection is discussed, and in particular, an explicit generic sensitivity rule describing the sensitivity of these features to damage in cantilever beams is proposed. The efficiency of this rule in identifying damage is investigated using EulerBernoulli cantilever beams with a crack. The validity of the approach is supported by three-dimensional elastic finite element simulation, incorporating the potential scatter in actual measurements. The results show that the generic sensitivity rule essentially provides a theoretical basis for optimal use of these features for damage identification in cantilever beams.
Original languageEnglish
Pages (from-to)630-643
Number of pages14
JournalMechanical Systems and Signal Processing
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Feb 2011

Keywords

  • Cantilever beams
  • Crack modeling
  • Damage identification
  • Fundamental mode shape
  • Static deflection

ASJC Scopus subject areas

  • Mechanical Engineering
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Control and Systems Engineering
  • Computer Science Applications
  • Signal Processing

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