薄板钢结构超声检测Lamb波激励与模态分析  

Ultrasonic Detection of Lamb Wave Stimulation and Modal Analysis of Thin Steel Plate Structure

作　　者：艾春安[1] 王学勇[1] 刘瑜[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《噪声与振动控制》2012年第1期137-140,共4页Noise and Vibration Control

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。This paper studies a common method and its procedure of ultrasonic detection of Lamb wave stimulation in thin steel plate structurel 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.

关 键 词：振动与波 LAMB波 激发策略 超声检测 工程应用 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置] TB55[自动化与计算机技术—控制科学与工程]