船用螺旋桨静态声散射预报方法及特性  

Prediction Method and Characteristics of Static Acoustic Scattering from Marine Propellers

作　　者：柯慧程 彭子龙 周富霖 陈添宝 KE Huicheng;PENG Zilong;ZHOU Fulin;CHEN Tianbao(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212000,Jiangsu,China;Unit 92578 of PLA,Beijing 100161,China;Key Laboratory of Marine Intelligent Equipment and System of the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212100 [2]92578部队,北京100161 [3]上海交通大学海洋智能装备与系统教育部重点实验室,上海200240

出　　处：《兵工学报》2024年第5期1523-1533,共11页Acta Armamentarii

基　　金：国家自然科学基金项目(52201397、52001211);江苏省自然科学基金项目(BK20200995)。

摘　　要：针对螺旋桨静态声散射特性预报问题,采用分层介质声传播理论与离散面元厚度信息相结合的板块元算法,建立变厚度曲面薄板目标声散射特性预报方法。基于面元厚度及材料属性信息求解所有面元的反射系数,进而求得目标的总散射声场。为了提高计算效率,通过单片桨叶网格拓扑克隆的方式实现完整螺旋桨的散射声场预报,并通过有限元和静态声散射特性湖上试验对新的预报方法的准确性进行了验证。研究结果表明:螺旋桨目标强度的频响特性、角度-距离谱以及空间指向性预报值与测试值基本一致。研究结果对水下航行器艉向附近的声散射特性预报具有一定的参考价值。For the prediction problem of static acoustic scattering characteristics of propellers,a planar element method combining the layered medium acoustic propagation theory and the discrete surface element thickness information is used to establish a prediction method for the acoustic scattering characteristics of thin plate targets with variable thickness surfaces.The basic idea is to solve the reflection coefficients of all surface elements based on the thickness of surface elements and material property information,and then obtain the total scattered acoustic field of the target.Considering the computational efficiency,the scattered sound field of a complete propeller is predicted by means of mesh topology clone from a single propeller blade.The results show that the predicted values of the frequency response characteristics,angle-distance spectrum and spatial directivity of propeller target strength are in general agreement with the experimental results.This study may be useful for the prediction of acoustic scattering characteristics near the stern of underwater vehicles.

关 键 词：螺旋桨 板块元方法 声散射特性 目标强度 

分 类 号：TB566[交通运输工程—水声工程]