基于射线声学的浅海目标前向散射声场建模OA

To address the complexity of calculating the forward scattering sound field of a target in shallow water wave-guides—a complexity arising from the combined influences of target scattering characteristics and environmental sound propagation properties—a ray-based model is established for the forward scattering sound field of a rigid target in such environments.The method integrates ray acoustics theory with the plane wave scattering function.The far-field calcula-tion formula for the forward scattering sound field of a rigid target in a Pekeris waveguide is derived using the virtual source method,thereby revealing the coupling relationship between the shallow water channel and the target scattering sound field in free space,as well as the sound propagation paths.Based on the established model,the forward scatter-ing sound field of a rigid sphere with a radius of 5 m was simulated.The results indicate that the forward scattering sound field calculated by the ray model shows good agreement with that calculated by the normal mode model.For high-frequency scattering sound field calculations,the proposed ray model demonstrates higher computational efficiency com-pared to the traditional normal mode model.Furthermore,the model clearly characterizes the geometric sound propaga-tion paths in shallow water waveguides,with clear physical implications.