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中文摘要：
该文对非均匀介质固体中缺陷响应的研究,用多高斯光束（MGB）模型来表示入射超声波波束。在对缺陷响应的研究中,由于粗颗粒界面的散射作用,所以考虑到超声波在非均匀介质体中传播时的衰减以及相速度的频散特性。分析了不同尺寸的方形孔缺陷由于压电超声传感器距离其位置的不同对接收到回波信号的影响。
英文摘要：
The objective of this paper is to predict the flaw response in an inhomogeneous solid medium.Multi-Gaussian Beam （MGB） model is used to represent the incident ultrasonic beam. The effect of ultrasonic attenuation and phase velocity dispersion due to grain scattering is included in the predictions.The variation of received voltage is analysed against the distance of the flaw from the transducer for different dimensions of a square cylinder void.
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