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http://dx.doi.org/10.7782/JKSR.2011.14.4.320

Structural Damage Detection by Using the Time-Reversal Process of Lamb Waves and the Imaging Method  

Jun, Yong-Ju (인하대학교 공과대학 기계공학과)
Lee, U-Sik (인하대학교 공과대학 기계공학과)
Publication Information
Journal of the Korean Society for Railway / v.14, no.4, 2011 , pp. 320-326 More about this Journal
Abstract
This paper proposes a baseline-free SHM technique in which the time-reversal process of Lamb waves and the imaging method are used. The proposed SHM technique has three distinct features when compared with the authors' previously proposed one: (1) It use the reconstructed signal for damage diagnosis, without need to extract the damage signal as the difference between reconstructed signal and initial input signal; (2) It use the imaging method based on the time-offlight information from the reconstructed signal, instead of using a pattern comparison method; (3) In order to make the damage image more clear, the modified mathematical definition of damage image in a pixel is used. The proposed SHM technique is evaluated through the damage detection experiment for an aluminum plate with damage at different locations.
Keywords
Lamb wave; Time-reversal; Structural damage; Damage detection; Imaging method; Plate;
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Times Cited By KSCI : 2  (Citation Analysis)
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