基于遗传算法的声学覆盖层等效参数反演方法研究  

Inversion of equivalent parameters of acoustic coating based on genetic algorithm

作　　者：王少博 王斌[1,2] 范军 李兵[1] WANG Shao-bo;WANG Bin;FAN Jun;LI Bing(Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Acoustics Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]上海交通大学高新船舶与深海开发装备协同创新中心,海洋工程国家重点实验室,上海200240 [2]哈尔滨工程大学水声技术重点实验室,哈尔滨150001

出　　处：《船舶力学》2023年第3期456-469,共14页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(11504233)。

摘　　要：针对敷设声学覆盖层结构的声学特性数值仿真需求,本文提出一种基于遗传算法的声学覆盖层等效材料参数反演方法。将内部有空腔结构的声学覆盖层等效为多层均匀材料,定义关于多角度反射系数的目标函数,反演各层均匀材料复纵波、剪切波速度,分析反射系数数量、方位对材料参数反演精度的影响,摆脱传统方法面临的初值依赖性和多值性问题。数值仿真表明,该方法可以准确反演多层均匀材料复纵波和剪切波速度,并可用于敷设声学覆盖层结构的目标强度数值仿真分析。In order to meet the requirements of numerical simulation of acoustic characteristics of acoustic cladding structures,a genetic algorithm based inversion method for equivalent material parameters of acoustic cladding was proposed.The acoustic coating with cavity structure was made equivalent to multi-layer homogeneous material,and the objective function of multi angle reflection coefficient was defined.The complex velocity of P-wave and shear wave in each layer of uniform material was inversed.The influence of the number and orientation of reflection coefficients on the inversion accuracy of material parameters was analyzed.The issues of initial value dependence and multivalue faced by traditional methods were overcome.The numerical simulation results show that the method can accurately retrieve the complex P-wave and shear wave velocity of multi-layer uniform material,and can be used for the numerical simulation analysis of the target strength of acoustic cladding structures.

关 键 词：声学覆盖层 材料参数反演 遗传算法 

分 类 号：TB566[交通运输工程—水声工程]