Proceedings of the KSR Conference (한국철도학회:학술대회논문집)
- 2008.11b
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- Pages.1397-1402
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- 2008
Health Monitoring of Composit Structures by using the Time-Reversal
탄성파의 시간-역전현상을 이용한 복합평판의 손상진단
Abstract
In this paper, damage detection method by using the time reversal is developed to detect damage on composit structures. The time reversal was investigated for direct root between PZT and PZT, but in case of a circular PZT, lamb wave moves not only along the direct root but also another roots. The center frequency of lamb wave is kept when the lamb waves are reflected from damage. This paper presents experimental and theoretical results for the new structural health monitoring method by above features of lamb wave, and we can increase accuracy of the new structural health monitoring method by using STFT(Short Time Fourier Transform).
Keywords