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应用超声技术对界面半球形凹坑上的纵波-瑞利波的波型转换进行了实验研究。在一个特制的钢质模型上,频率为IMHz的纵波从6个不同方向依次入射到3个不同直径的表面凹坑上,然后在8个不同的方向上接收瑞利波。所接收的散射信号被数字化后进行了FFT运算。根据所得实验数据得知,当纵波垂直入射凹坑时所转换的瑞利波的总能量最大;当凹坑直径与入射波长相等时波型转换率最大等结论。其中一些结果为反卷积运算和已知数值计算所验证。
The application of ultrasonic technology to the interface hemispherical pit on the longitudinal wave - Rayleigh wave mode conversion experiments. In a special steel model, a longitudinal wave of IMHz is incident on three surface dimples of different diameters in order from six different directions, and then the Rayleigh waves are received in eight different directions. The received scattered signal is digitized and FFT processed. According to the experimental data obtained, the total energy of the Rayleigh wave converted when the longitudinal wave is perpendicularly pitted into the pit is the largest. When the diameter of the pits is equal to the incident wavelength, the wave-type conversion rate is the largest. Some of these results are validated by deconvolution and known numerical calculations.