某小型潜航器的声散射特性研究

Study on acoustic scattering characteristics of a small submersible vehicle

运用目标回声强度预报的板块元方法,研究某小型潜航器的水下回声特性。计算并分析了入射波频率和方位对其声散射特性的影响规律;利用板块元法得到的散射特性,根据频域间接法仿真出水下声成像结果;完成外场试验,将试验结果与计算结果进行对比,吻合较好。研究表明潜航器中的桅杆结构对其散射有较明显影响。

Echo characteristics of a small type submersible vehicle are investigated by using planar element method which is commonly used for forecasting echo strength of targets.The effects of incident plane wave frequency and incident azimuth angle on the acoustic scattering characteristics are calculated and analyzed.According to the scattering characteristics obtained by plate element method,the acoustic imaging results are simulated by the frequency-domain indirect method.The field experiments show that the experimental and the numerical results are in good agreement.The results show that the mast structure has a significant influence on the scattering results.