中文摘要：

超声的兰姆波浪为非破坏性的测试和像板或像管子的结构的评估被看作一个敏感、有效的工具。multimode 和分散的性质在他们通过结构宣传的时间和频率领域引起波浪包到传播，和模式重叠。由使用一种二部件的激光干涉仪技术，在有分散特征的 priori 知识和兰姆波浪模式的波浪结构信息的联合，一种二部件的信号处理技术为为兰姆波浪的二个模式混合信号同时实现分散移动和模式分离被介绍。建议算法首先被处理并且验证了使用合成兰姆波浪信号。然后，二部件的排水量测试实验用不同的铝板样品被进行。而且，我们证实这个方法的有效性和坚韧性。

英文摘要：

Ultrasonic Lamb waves are considered as a sensitive and effective tool for nondestructive testing and evaluation of plate-like or pipe-like structures. The nature of multimode and dispersion causes the wave packets to spread, and the modes overlap in both time and frequency domains as they propagate through the structures. By using a two-component laser interferometer technique, in combination with a priori knowledge of the dispersion characteristics and wave structure information of Lamb wave modes, a two-component signal processing technique is presented for implementing dispersion removal and mode separation simultaneously for two modes mixture signals of Lamb waves. The proposed algorithm is first processed and verified using synthetic Lamb wave signals. Then, the two-component displacements test experiment is conducted using different aluminum plate samples. Moreover, we confirm the effectiveness and robustness of this method.