二维结构损伤的主动Lamb波定位技术研究

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2004, Vol. 25 ›› Issue (5): 476-479.

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Study on Two-dimensional Damage Location in Structure Based on Active Lamb Wave Detection Technique

XU Ying-di, YUAN Shen-fang, PENG Ge

Research Institute of Smart Material and Structure, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2003-09-08 Revised:2004-04-12 Online:2004-10-25 Published:2004-10-25

Abstract

Abstract: This study adopts active Lamb Wave detection technique to damage detection in composite materials, using ellipse technique in order to localize the two-dimensional damage in structure. Three methods are applied to compute the time delay between differential signal and health signal. Experiments results are conducted to demonstrate that wavelet transformation analysis has an advantage over the others for the precise damage location when Signal-to-Noise is little.

Key words: damage localization, active Lamb wave detection, time delay, wavelet transformation, ellipse technique

XU Ying-di;YUAN Shen-fang;PENG Ge. Study on Two-dimensional Damage Location in Structure Based on Active Lamb Wave Detection Technique[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2004, 25(5): 476-479.

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Study on Two-dimensional Damage Location in Structure Based on Active Lamb Wave Detection Technique

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