基于ANSYS和SYSNOISE的水下目标低频散射声场仿真

Simulation of Scattering Acoustic Field of Underwater Target in Low-Frequency Based on ANSYS and SYSNOISE

提出了一种水下目标低频散射声场的仿真方法。根据边界元理论推导了目标散射声场的Helmholtz公式,给出了有限元分析软件ANSYS和振动-声分析软件SYSNOISE联合仿真方法和流程,计算了刚性球体的场点声压,并与经典理论结果对比,验证了该方法的适用性,对Bs TSSi潜艇模型低频近域散射声场进行了仿真分析,得到了该目标表面声压分布、散射声场声压分布及其方向图。该方法计算精度高、仿真结果直观,便于分析水下复杂目标散射机理和规律特性。

A method to solve the low-frequency scattering acoustuc of underwater target was put forward. The Helmhbhz formula of scattering acoustic field was derived based on boundary element method （BEM）. The method and process of simulation using ANSYS and SYSNOISE was put forward. By contrasting calculation results of the rigid sphere from the academic data, the applicability of the method was proved. By simulating the BsTSSi submarine model, the surface pressure and the distribution and direction of scattering acoustic field pressure were obtained. The results show that the method is accurate and straight forward. The method can analyze scattering essence and rule of underwater complex target..