冰层边界下壳体结构声振特性数值分析  

Numerical Analysis of Acoustic and Vibration Characteristics of Shell Structures under Ice Boundary

作　　者：王硕 叶天贵 陈玉坤 靳国永[1] 潘旭东 WANG Shuo;YE Tiangui;CHEN Yukun;JIN Guoyong;PAN Xudong(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《船舶工程》2024年第6期15-23,共9页Ship Engineering

基　　金：国家自然科学基金(52225109,52241101,52271309)。

摘　　要：为厘清极区环境下水下航行器与海冰边界之间的声振耦合机理,基于Virtual.Lab软件,采用有限元和边界元法对无限大冰区进行建模和验证计算,并采用声振耦合方法建立壳体-海水-海冰的多维度多场耦合模型,分析冰层厚度和壳体与冰层之间的距离对结构振动和声辐射的影响。研究表明:冰层边界对结构振动的影响较小,对声辐射的影响较大;冰层边界在低频段对声波的反射大于自由液面对声波的反射;随着频率的升高,冰层边界对声波的反射逐渐小于自由液面对声波的反射;随着冰层厚度的增加,冰层对声波的反射作用逐渐增强;随着壳体与冰层边界之间距离的增加,冰层对声波的吸收作用逐渐减弱。研究成果可供极区环境下水下航行器的声振特性研究参考。In order to clarify the coupling mechanism between underwater vehicle and sea ice boundary in polar environment,based on Virtual.Lab software,finite element and boundary element methods are used to verify and calculate the modeling of infinite ice region,and then a multi-dimensional and multi-field coupling model of shell,seawater and sea ice is established by acoustic and vibration coupling method.The effects of different ice thickness and distance between shell and ice on structural vibration and sound radiation are analyzed.The results show that the ice boundary has less effect on vibration and more effect on sound radiation.The reflection of the ice boundary to the sound wave is larger than that of the free liquid in the low frequency band,and gradually smaller than that of the free liquid in the face of the sound wave as the frequency increases.With the increase of the ice thickness,the reflection effect of the ice on the sound wave is gradually enhanced,and the absorption of the sound wave by the ice is gradually reduced with the increase of the distance between the shell and the ice boundary.The research results can provide a reference for the study of acoustic and vibration characteristics of underwater vehicles in polar environment.

关 键 词：海冰 声振耦合 振动 声辐射 

分 类 号：U671.99[交通运输工程—船舶及航道工程]