透声窗尺寸对窗内基阵辐射声场影响仿真分析

Simulating the impact of acoustic window sizes on acoustic radiation field from sonar array in the window

基于惠更斯-菲涅尔原理提出了一种再辐射的方法来计算窗内基阵定向发射时的远场声特性,并用SYSNOISE软件进行仿真计算.首先推导了矩形活塞相控阵的辐射声场,并与软件计算结果进行对比,验证了软件仿真的可靠性;然后利用声场计算软件验证了再辐射方法的可行性;最后用再辐射的方法仿真了透声窗尺寸对相控阵的影响.结果表明:选择适当的透声窗尺寸,可以显著提高声呐基阵大角度声学性能.

A re-radiation method to calculate the far-field acoustic performance of the phased array in acoustic window was proposed based on the Huygens-Fresnel principle. Firstly, the acoustic radiation field of a rectangular piston phased array was simulated by SYSNOISE software. Results were corn pared with the theoretical results to verify the reliability of simulating method by software. Then the feasibility of the re radiation method was verified by the acoustic field software. And the impact of the sizes of acoustic window on the phased array was simulated by the re-radiation method. It is concluded that when radiating in a large angle, the acoustic performance of the sonar array can be improved sig- nificantly if the sizes of the acoustic window is designed properly.