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中文摘要：
Lamb波具有传播距离远、衰减小等特点,已被广泛应用于大型板类结构的损伤检测。时间反转是实现超声波聚焦的有效方法之一。本文回顾并总结了近20年来时间反转方法在Lamb波检测领域中的研究进展。针对Lamb波固有的频散和多模态等传播特性,详细论述了时间反转法在板结构Lamb波检测中的应用。最后对基于时间反转法的免基准信号Lamb波损伤检测方法进行了总结,分析其存在的问题并对其应用前景进行了展望。
英文摘要：
Lamb waves are characterized by long distance propagation with small attenuation and are already widely used in damage detection for large scale plate type structure.Time reversal is one of effective methods to achieve ultrasonic focusing.In this paper,research progress of time reversal method used in Lamb wave detection technology in the past 20 years is reviewed and summarized.Aiming at the inherent propagation characteristics of Lamb waves,such as frequency dispersion and multi-mode,detailed discussion about the application of time reversal in Lamb wave detection for plate type structure was conducted.Finally,free reference signal Lamb wave damage detection method based on time-reversal is summarized,the currently existing problems are analyzed and its application prospect is forecasted.
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