中文摘要：

通过在铝板上打孔来模拟铝板中的裂缝缺陷，分别在正向、反向上激励出Lamb波，采用一发一收法，研究缺陷前后薄铝板中的Lamb波信号变化。通过对比分析，提出了基于皮尔逊相关系数法的无损判定方法，为工程中的铝结构提供了一种快速而有效的无损检测方法。

英文摘要：

The crack was made in the aluminum sheet to simulate reverse direction,and pitch-catch technique was utilized. The signals detection method based on is proposed. Hence,it will provide a fast and the crack defects. Lamb waves were inspired in forward and before and after crack was compared, and a nondestructive effective way to detect the cracks on the aluminum sheet.