摘要
应用三维弹性理论对Lamb波频散曲线进行理论建模。在Lamb波主动监测系统中,应用Gabor小波变换理论分析Lamb波信号的时延及相位角,获得了板中Lamb波的相群速度频散曲线。比较理论曲线与实验数据,证明了三维弹性理论建模方法的有效性。
In this paper, the frequency dispersive curves of the Lamb waves propagating in plates are modeled using the 3-D elastic theory. In the experiments, according to the time delay and the angle of Lamb wave signals analysed by Gabor wavelet transform , the experimental dispersive curves are obtained. Compared the two dispersive curves, the 3-D elastic theory could be proved efficient.
出处
《计测技术》
2008年第5期5-9,共5页
Metrology & Measurement Technology
关键词
LAMB波
三维弹性理论
建模
传播特性
小波变换
Lamb wave
3-D elastic theory
modeling
propagational characteristics
wavelet transform
