Abstract: This paper studies a common method and its procedure of ultrasonic detection of Lamb wave stimulation in thin steel plate structure. The signal was stimulated by ultrasonic oblique incident Lamb wave and the modes of the signal were analyzed. According to the experiment, it is found that with a proper combination of frequency and incident angle, selection and control of the modes of the Lamb wave can be realized. Thus, the best stimulating strategy of the detection can be obtained. This study is of important significance for the Lamb wave testing in engineering application.

Key words: vibration and wave, Lamb wave, stimulating strategy, ultrasonic testing, engineering application

摘要： 运用超声Lamb波对薄板钢结构进行检测，采用斜入射方式实施Lamb波的激励，并对检测信号进行模态分析。经实验发现选择合适的频率/入射角组合可实现对Lamb波模态的选择和控制，实现对检测对象的检测策略，并具有一定的工程应用价值。

关键词: 振动与波, Lamb波, 激发策略, 超声检测, 工程应用