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Damage detection in plate structures using modal power flow analysis

  • X. Liu*
  • , W. O. Wong
  • , L. Cheng
  • *Corresponding author for this work
  • Hong Kong Polytechnic University

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

Abstract

The power flow and energy distribution of a vibration mode of a damaged plate is studied experimentally. Variation of the modal reactive power distribution of a damaged plate is experimentally evaluated with a scanning LDV and compared to the theoretical predictions. Large variation of local reactive power flow in or around the damage region of a plate under resonant vibration is found to be related to the change of strain and kinetic energies in the damage region. Feasibility of damage identification based on the detection of this local variation of modal reactive power flow in a structure is studied.

Original languageEnglish
Title of host publication9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course
Pages150-154
Number of pages5
DOIs
StatePublished - 2010
Externally publishedYes
Event9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course - Ancona, Italy
Duration: 22 Jun 201025 Jun 2010

Publication series

NameAIP Conference Proceedings
Volume1253
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course
Country/TerritoryItaly
CityAncona
Period22/06/1025/06/10

Keywords

  • Damage detection
  • Modal analysis
  • Power flow

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