基于迭代物理声学的导管中高频声散射特性研究  

Study of medium-frequency and high-frequency acoustic scattering characteristics of duct based on an iterative physical acoustics method

作　　者：王文欢 王斌[1,2] 范军[1,2] 焦慧锋[3] WANG Wenhuan;WANG Bin;FAN Jun;JIAO Huifeng(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240;Key Laboratory of Marine Intelligent Equipment and System,Ministry of Education(Shanghai Jiao Tong University),Shanghai 200240;China Ship Scientific Research Center,Wuxi 214082)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]海洋智能设备与系统教育部重点实验室(上海交通大学),上海200240 [3]中国船舶科学研究中心,无锡214082

出　　处：《声学学报》2025年第2期445-455,共11页Acta Acustica

基　　金：国家自然科学基金项目(12374423)资助。

摘　　要：针对具有空腔结构的导管中高频声散射问题,推导了基于迭代物理声学的导管多次散射声场计算公式,通过与JD7704导管的数值仿真和试验实测结果对比得到,该计算公式能够准确、高效地解决此类空腔结构的声散射问题。此外,通过分析其散射回波的距离–角度谱,观察到导管结构特有的多次散射干涉回波特征,并详细阐述了其形成机理。在此基础上,以NACA0012翼型剖面导管为例,采用迭代物理声学方法分析了不同翼型剖面厚度、拱度和攻角对导管目标强度的影响。研究表明,导管的第1阶散射回波准确反映其外部轮廓特征,高阶回波由于声波在腔体内传播路径的增长,表现为超出外部轮廓的多个“八”字亮线,反映其内部腔体结构特点,为水下目标识别提供可辨识的精细特征。In the study of medium-frequency and high-frequency acoustic scattering from ducts with cavity structures,formulae for calculating their multiple scattering based on an iterative physical acoustics method are introduced and derived.The formulae can accurately and efficiently solve the high-frequency sound scattering problem in such cavity structures,as verified by numerical simulations and experimental measurements on a JD7704 duct.In addition,by analyzing the distance-angle spectrum of the scattered echoes,the unique multiple scattering interference characteristics of the duct structure are observed,and the mechanism of their formation is explained in detail.On this basis,taking the NACA0012 profile duct as an example,the effects of different profile thickness,curvature,and angle of attack on the duct target strength are analyzed using the iterative physical acoustics method.The research results show that the first-order echo of a duct accurately reflects its external contour characteristics.The high-order echo appears as multiple bright lines beyond the external contour due to the increase in the propagation path of the sound wave in the cavity,reflecting the characteristics of its internal cavity structure and providing identifiable fine features for underwater target identification.

关 键 词：迭代物理声学 导管 多次散射 目标强度 

分 类 号：O422.5[理学—声学]