Based on the ultrasonic guided wave technique and the dispersive waveform prediction method, a method about how to image defects in pipes is presented.
在导波传播理论和频散波形预测理论的基础上，研究了超声导波在检测管道时，如何利用时域波形重构缺陷图像的问题。
Clearly models for ultrasonic generation and propagation in anisotropic materials must include the effect of anisotropy and temperature on the dispersive wave propagation.
分析各项异性材料中超声产生和传播的模型必须包括各向异性和温度对波传播中色散的影响。
The results show that the dispersive wave excited by these two acoustic sources have strong contrast, which are Stoneley wave for monopole and flexural wave for dipole in the lowest mode.
结果表明，这两种声源激发的频散波具有很强的可对比性，它们的最低模式在单极声源激发时是斯通利波，在偶极声源激发时是弯曲波；
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