用二维傅里叶变换识别兰姆波模式的研究

Mode identify of Lamb wave by means of 2-D FFT

本文用二维傅里叶变换信号处理进行了兰姆波模式分析。通过理论计算与实验结果的比较表明 ,二维傅里叶变换技术能有效地分析识别兰姆波模式。实验中 ,采用直探头与可变角探头作为超声波换能器做了接收宽带兰姆波信号的对比。

Analysis of Lamb wave mode using 2 D FFT signal processing is done in this paper. The comparison between the theoritical calculations and experimental results shown that the 2 D FFT technique can be effectively used to analyze Lamb wave mode. In the experiment, both the normal probe and variable angle probe are used to receive broadband Lamb wave signals.