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利用孔隙弹性介质界面的声波散射公式计算对比了以Biot-Stoll模型和附加颗粒间喷射流及剪切阻力的Biot模型(简记为BICSQS模型)描述的海底的光滑平面反射系数和粗糙界面的背向散射系数,并分析了BICSQS模型中体积弛豫频率和剪切弛豫频率对其结果的影响。结果表明：两种模型反射系数的差别主要在垂直方向和表观临界角附近,而背向散射系数的差别主要在表观临界角附近,并且最大差别可以分别达到1．5dB和2dB；另外,体积和剪切弛豫频率的变化分别影响中频段(10～100kHz)和高频段(100kHz以上)的BICSQS模型的反射和背向散射系数,但引起的变化量很小。
Using the acoustic wave scattering formula at the interface of porous media, we compared the smooth surface reflection coefficient and the back of the rough interface described by the Biot model (abbreviated as BICSQS model) of jet and shear resistance between the Biot-Stoll model and the additional particles Scattering coefficient, and analyze the influence of the volume relaxation frequency and the shear relaxation frequency on the BICSQS model. The results show that the difference between the reflection coefficients of the two models is mainly around the vertical direction and the apparent critical angle, and the difference of the backscattering coefficient is mainly around the apparent critical angle, and the maximum difference can reach 1.5dB and 2dB respectively. In addition, The changes of volume and shear relaxation frequency affect the reflection and backscatter coefficients of BICSQS model in the mid-frequency range (10 ~ 100kHz) and the high-frequency range (100kHz and above), respectively, but the changes are small.