Lamb wave scattering analysis for reflector characterization
Lamb wave scattering analysis for reflector characterization
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DOI：
10.1109/58.585189
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Younho Cho;D. D. Hongerholt-D.;Joseph L. Rose
中科院分区：
文献类型：
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作者：
Younho Cho;D. D. Hongerholt-D.;Joseph L. Rose
研究了导波在缺陷表征中的潜在应用。考虑了缺陷形状和尺寸对透射场和反射场的影响。利用混合边界元技术，对所选导波模式的反射系数和透射系数进行了数值计算，并与实验数据进行了比较。选择宽高比作为各种缺陷的形状参数，测量了输入缺陷的某些导波模式的透射和反射系数。然后通过监测不同形状和深度缺陷的透射和反射系数，研究了缺陷尺寸的影响。所提出的研究表明，如果可以建立适当的模式选择标准，缺陷表征是可能的。与透射和反射系数数据相关的适当特征也可用于缺陷表征的算法开发和实现目的。
The potential use of guided waves for defect characterization is studied. The influence of defect shape and size on transmitted and reflected fields is considered. Using the hybrid boundary element technique, the reflection and transmission coefficients for selected guided wave modes are numerically calculated and compared to experimental data. Selecting the aspect ratio as a shape parameter for various defects, the transmission and reflection coefficients are measured for certain guided wave modes input to the defect. The influence of defect size is then studied by monitoring the transmission and reflection coefficients for defects of various shapes and depths. The studies presented indicate that defect characterization is possible if a proper mode selection criteria can be established. The suitable features related to transmission and reflection coefficient data can also be used for algorithm development and implementation purposes of defect characterization.