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根据浅海混响射线简正波理论和可分离的海底散射模型,导出了混响垂直相关的表达式,理论研究和实验结果表明垂直相关与接收深度有关,与声源深度无关。提出一种利用混响强度衰减曲线与混响垂直相关曲线联合反演海底反射损失和海底散射强度的方法。数值模拟反演及对实验数据的反演表明:所提出的反演方法具有实验简便、反演速度比较快及反演的结果比较稳定等特点。
According to the theory of shallow sea reverberation ray and separable seafloor scattering model, the expression of vertical correlation of reverberation is derived. The theoretical and experimental results show that the vertical correlation is related to the receiving depth and has nothing to do with the sound source depth. A method is proposed to jointly use the reverberation intensity decay curve and the reverberation vertical correlation curve to inverse the seafloor reflection loss and seafloor scattering intensity. The inversion of numerical simulation and inversion of experimental data show that the proposed inversion method has the characteristics of simple experiment, fast inversion and relatively stable inversion results.