中文摘要：

针对传统时间-距离域变换方法容易使频散补偿后的Lamb波信号波形发生畸变的问题，提出一种考虑波形修正的时间-距离域映射（TDDM）方法并用于Lamb波高分辨率多损伤成像中。首先分析了Lamb波频散特性对传感信号的影响，然后研究了TDDM方法的频散补偿原理，并对TDDM的实现进行了讨论，在讨论中给出了时间-距离域变换方法扰乱信号波形的原因。提出了基于TDDM的Lamb波高分辨率多损伤成像方法。并通过实验证明了所提方法的有效性。

英文摘要：

Aiming at the problem that traditional time-distance domain transform method easily makes the waveforms of the compensated dispersive Lamb waves deformed, a time-distance domain mapping （TDDM） method considering signal waveform correction is introduced and applied to high resolution multi-damage Lamb wave imaging. The effect of Lamb wave dispersion characteristic on sensor signals is firstly analyzed. Then, the dispersion compensation princi- ple of TDDM is studied and the realization of TDDM is discussed. In the discussion, the reason why the time-distance domain transform method disturbs the signal waveforms is given. The high resolution multi-damage imaging method based on TDDM is proposed. Finally, the experiment results verify the effectiveness of the method presented in the pa- per.