多圆柱组合体目标回波特性  

Echo characteristics of a multi-cylindrical combination target

作　　者：张弘瑞 陈文剑[1,2,3] 王艺迪 厉夫兵 ZHANG Hongrui;CHEN Wenjian;WANG Yidi;LI Fubing(National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;The 28th Research Institute of China Electronics Technology Group Corporation,Nanjing 210007,China;School of Information and Communication Engineering,Beijing Information Science and Technology University,Beijing 100101,China)

机构地区：[1]哈尔滨工程大学水声技术全国重点实验室,黑龙江哈尔滨150001 [2]海洋信息获取与安全工业和信息化部重点实验室(哈尔滨工程大学)工业和信息化部,黑龙江哈尔滨150001 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [4]中国电子科技集团公司第二十八研究所,江苏南京210007 [5]北京信息科技大学信息与通信工程学院,北京100101

出　　处：《哈尔滨工程大学学报》2025年第1期138-147,共10页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(12074089);海洋智能装备与系统教育部基金项目(MIES-2020-10).

摘　　要：针对多圆柱组合体目标回波中的多次散射声场计算问题,本文提出在声束弹跳方法中利用KD树结构加速声束追踪的研究方法。建立基于多圆柱组合体目标的轴对称包围盒,通过最大方差法和中间剖分法在空间不同维度上对包围盒进行划分,同时通过分离轴算法进行面元数据的归属分配,经过多次划分后完成目标KD树结构的建立;进行声束构建和声束追踪,加快追踪时声束与面元的相交判断过程;根据追踪结果进行多圆柱组合体目标强度的计算。结果表明:声波在柱体之间存在多次声散射,多次散射与一次散射回波存在相位差,干涉叠加后导致多圆柱组合体目标强度在原本一次散射的基础上得到增强或减弱。通过实验测量结果与仿真计算结果对比,不同入射角度下实测结果与理论预报结果都有较好的一致性。We propose a research method that accelerates sound beam tracking by using a KD tree structure in the sound beam bouncing method to address the calculation challenges of multiple scattering sound fields in the target echo of multicylindrical combinations.The method first establishes an axisymmetric bounding box around the multicylinder combination object.Then,it divides this bounding box into different dimensions using the maximum variance method and the middle subdivision method.Simultaneously,the separation axis algorithm is used to assign the attribution of the face element data.After multiple divisions,the target KD tree structure is established.Next,sound beams are constructed for tracking to expedite the process of determining the intersection between the sound beam and the surface element during tracking.Finally,the target strength of the multicylinder combination is calculated based on the tracking results.Results reveal multiple acoustic scatterings between the cylinders and a phase difference between the multiple scattering and the primary scattering echoes.After interference superposition,the target strength of the multi-cylindrical combination is enhanced or weakened based on the original primary scattering.By comparing the experimental results with the simulation calculation outcomes,the measured results under different incident angles agree well with the theoretical predictions.

关 键 词：多圆柱组合体 回波特性 多次散射 KD树 声束弹跳法 空间划分 声束追踪 目标强度 

分 类 号：O427.2[理学—声学] O427.9[理学—物理]