基于时间反转法的Lamb波检测技术的研究进展  

Progress of Lamb Wave Detection Technology Based on Time Reversal Method

作　　者：刘增华[1] 徐庆龙[1] 董拓灿 龚裕[1] 何存富[1] 吴斌[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《实验力学》2015年第2期131-141,共11页Journal of Experimental Mechanics

基　　金：国家自然科学基金项目(50975006;11272021;51475012);北京市自然科学基金项目(1122007);北京市教委科技计划项目(KM201010005003);北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD201304048)

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。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.

关 键 词：时间反转 损伤检测 超声波聚焦 信号重构 免基准信号 

分 类 号：TB302.5[一般工业技术—材料科学与工程] TB551[理学—物理]