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利用兰姆波方法检查金属薄板时,首先应确定在板中所传播的波是不是兰姆波。本文介绍在薄板中,特别是在较厚的薄板中激励兰姆波的条件及其鉴别的方法。对分层漏检的原因进行了分析,并提出了相应的处理方法。
When using Lampe method to inspect metal sheets, it is first necessary to determine if the wave propagating in the plate is Lamb wave. This article describes the conditions for exciting Lamb waves in thin plates, especially in thicker plates, and how to identify them. The reason of stratified missed inspection is analyzed and the corresponding processing method is put forward.