Vibro-modulation and Guided wave techniques for contact defect detection in plate |
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| Authors: | JIAO Jingpin HE Cunfu WU Bin B.W.Drinkwater S.A.Neild P.D.Wilcox |
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| Affiliation: | JIAO Jingpin HE Cunfu WU Bin (Department of Mechanical Engineering,Beijing University of Technology Beijing 100124) B.W.Drinkwater S.A.Neild P.D.Wilcox (Department of Mechanical Engineering,University of Bristol Bristol,BS8 1TR,UK) |
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| Abstract: | A nonlinear acoustic technique for detection of contact defects in plates was developed associating guided waves with vibro-modulation techniques.The low frequency vibration varies the interface area within the contact defect;then the amplitude and phase of high frequency guided waves reflected from the contact defect will be modulated.Due to the exiting of contact defects,there was obvious low frequency component in the time-frequency distribution of modulated guided wave series.Furthermore the nonlinear r... |
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