水下弹性角反射器声散射特性

陈鑫;罗祎;李爱华

兵工学报 ›› 2018, Vol. 39 ›› Issue (11) : 2236-2242.

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  • 主管：中国科学技术协会

    主编：许毅达

    ISSN 1000-1093

    　

  • 主办：中国兵工学会

    出版：《兵工学报》 编辑部

    CN 11-2176/TJ

《兵工学报》是我国国防科技领域最具影响力的学术期刊之一，创刊于1979年，目前被国内所有重要数据库收录，其综合评价指标近年来一直名列兵工技术类科技期刊的首位；《兵工学报》目前还被国际上著名的检索机构美国......
兵工学报 ›› 2018, Vol. 39 ›› Issue (11) : 2236-2242. DOI: 10.3969/j.issn.1000-1093.2018.11.018
论文

水下弹性角反射器声散射特性

  • 陈鑫1， 罗祎1， 李爱华2
作者信息 +

Acoustic Scattering Characteristics of Underwater Elastic Corner Reflectors

  • CHEN Xin1， LUO Yi1， LI Ai-hua2
Author information +
文章历史 +

摘要

计算水下弹性角反射器声散射问题，需要考虑声波多次散射以及结构和水的流固耦合作用。针对现有水下弹性角反射器声散射特性分析方法的不足，利用结构有限元耦合流体间接边界元法对水下弹性角反射器的远场散射声场进行仿真计算。分析了入射波频率为5.0～20.0 kHz范围内，平板材料、厚度、入射角度及角反射器类型等因素对目标强度的影响及其散射机理。结果表明：水下弹性角反射器的散射声场具有很强的频率特性，且随材料、平板厚度和入射波频率的变化而改变；多次散射波对角反射器的反向散射声场具有重要贡献，仿真数据和实测数据基本一致。进一步提出了角反射器结构设计和优化方法，为水下无源声反射器的论证与设计提供了理论参考依据。

Abstract

The multiple scattering of sound waves and the fluid-structure interaction should be taken into account to calculate the acoustic scattering of underwater elastic corner reflectors. The scattering acoustic field of underwater elastic corner reflectors in far field is simulated by using structure finite element method (FEM)/fluid indirect coupled boundary element method (IBEM). The influences of plate material and thickness, incident angle and the type of corner reflector on target strength and the scattering mechanism are analyzed when the incident wave frequency varies from 5.0 kHz to 20.0 kHz. The results show that the scattering acoustic field of underwater elastic corner reflectors has a strong frequency characteristic. It varies with plate material and thickness,and incident wave frequency. The multiple scattering of sound waves has important contributions to the backscattering acoustic field of corner reflectors. The simulated results are in good agreement with the experimental results. The structure design and optimization method of corner reflectors are presented.Key

关键词

水下弹性角反射器 / 间接边界元 / 散射声场 / 流体与固体耦合

Key words

underwaterelasticcornerreflector / indirectboundaryelementmethod / scatteringacousticfield / fluid-structurecoupling

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陈鑫， 罗祎， 李爱华. 水下弹性角反射器声散射特性. 兵工学报. 2018, 39(11): 2236-2242 https://doi.org/10.3969/j.issn.1000-1093.2018.11.018
CHEN Xin， LUO Yi， LI Ai-hua. Acoustic Scattering Characteristics of Underwater Elastic Corner Reflectors. Acta Armamentarii. 2018, 39(11): 2236-2242 https://doi.org/10.3969/j.issn.1000-1093.2018.11.018

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第39卷
第11期2018年11月兵工学报ACTA
ARMAMENTARIIVol.39No.11Nov.2018

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