基于奇异积分处理技术的低频声散射特性仿真

Simulations of Acoustic Scattering at Low Frequency Based on Technique of Singularity-Integral Processing

针对水下复杂条件下难以远程探测目标的问题,运用基于奇异积分处理技术的低频声散射数值计算方法,对目标低频散射特性进行仿真研究。仿真实验给出刚性球的目标强度随分置角、接收点到目标中心的距离、声阻抗等不同物理参数的变化关系图,揭示目标低频声散射的一些近场特性。结果表明:新方法可较方便地用于双基地声纳、目标低频散射特性等方面的相关研究。

Aiming at the problem of difficult to long-distance detect object in underwater condition,study on its scattering characteristic of object low frequency,using simulations mathematical method of acoustic scattering at low frequency based on of singularity–integral processing technique.Through simulating,we calculated echo strength which is under circumstances of different azimuths,positions of receiver and acoustic impedance.At the same time,we plot direction diagram of acoustic scattering at different wave number radii.The results demonstrate that the proposed new method can be used to the research of bistatic sonar and the scattering characteristics of complicated objects at low frequencies.