基于物理声学法的目标双基地散射场计算

运用物理声学法预报水下目标双基地散射特性时,由于忽略了阴影面对散射场的影响,存在随着分置角的增大计算误差越来越大的缺点。针对这一问题,提出对目标表面散射积分区域进行修正的方案,从而将物理声学法的适用范围推广到任意分置角。对刚性球体和有限长柱体的散射特性计算结果表明:文中所提出的方法提高了目标大分置角声散射特性的计算精度,可以用于水下目标双基地散射场预报。

Calculation of target bistatic acoustic scattering using physical acoustic method

This paper presents an efficient way to calculate the bistatic scattering from an underwater target with the physical acoustic method.When the traditional physical acoustic method is used to forecast bistatic echoes of the underwater target,the error in calculation is becoming unacceptable with an increment in bistatic angle.Aiming at this problem,the integral formula of the physical acoustic method is modified so that it can be used for arbitrary bistatic angle.The target strength of the rigid sphere and cylinder with finite length is calculated to verify the proposed method.The simulation results show that the proposed method can be used to precisely calculate the big bistatic angle scatter-ing from underwater target.