Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Structural Damage Diagnosis Method by Using the Time-Reversal Property of Guided Waves

유도초음파의 시간.역전 현상을 활용한 구조손상 진단기법

  • Lee, U-Sik (Department of Mechanical Engineering, Inha Univ.) ;
  • Choi, Jung-Sik (Department of Mechanical Engineering, Inha Univ.)
  • 이우식 (인하대학교 기계공학과) ;
  • 최정식 (인하대학교 기계공학과)
  • Received : 2010.03.12
  • Accepted : 2010.05.01
  • Published : 2010.06.01
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Abstract

This paper proposes a new TR-based baseline-free SHM technique in which the time-reversal (TR) property of the guided Lamb waves is utilized. The new TR-based SHM technique has two distinct features when compared with the other TR-based SHM techniques: (1) The backward TR process commonly conducted by the measurement is replaced by the computation-based process; (2) In place of the comparison method, the TOF information of the damage signal extracted from the reconstructed signal is used for the damage diagnosis in conjunction with the imaging method which enables us to represent the damage as an image. The proposed TR-based SHM technique is then validated through the damage diagnosis experiment for an aluminum plate with a damage at different locations.

Keywords

References

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