水下非正交声学角反射器声散射特性研究

谢涛涛; 罗 祎; 肖大为

doi:10.11993/j.issn.2096-3920.2022.01.012

水下非正交声学角反射器声散射特性研究

doi: 10.11993/j.issn.2096-3920.2022.01.012

海军工程大学兵器工程学院, 湖北武汉, 430033

详细信息

作者简介:
谢涛涛(1995-), 男, 硕士, 主要研究方向为兵器工程.

中图分类号: TJ630 TB566
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- 文章访问数: 28
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- PDF下载量: 17
- 被引次数: 0
出版历程
- 收稿日期: 2020-08-14
- 修回日期: 2021-03-29
- 刊出日期: 2022-02-28

Analysis of Acoustic Scattering Characteristics of Underwater Non Orthogonal Acoustic Corner Reflectors

College of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China

摘要

摘要: 水下角反射器具有较强的远场声散射特性, 由于存在生产装配误差, 标准正交金属角反射器无法满足各板面绝对垂直, 生产误差是。文中研究非正交角反射器的声散射特性, 利用夹逼定理思想改变标准角反射器平板之间的夹角为°、85°和0°, 并进行定性分析采用结构建模软件NSYS依次对非正交二面角、三面角反射器进行模型构建及网格划分再利用声学仿真软件YSNOISE根据结构有限元+流体边界元的方法对其远场声散射特性进行仿真, 并与标准正交角反射器在相同的载荷条件与声场条件下的声散射特性进行对比, 得到声波不同入射角度下的目标声散射强度随入射声波频率变化规律。仿真结果表明, 正交角反射器声散射特性优于非正交角反射器, 正交二面角反射器优于三面角反射器, 二面角反射器生产误差在°以内不会对声散射特性造成实质性影响。
- 水下角反射器 /
- 生产误差 /
- 结构有限元 /
- 流体边界元 /
- 声散射 /
- 目标强度
Abstract: Underwater corner reflectors possess strong far-field acoustic scattering characteristics, and because of the assembly error, the standard orthogonal metal corner reflector cannot meet the absolute vertical of each plate. The production error is an important factor that affects the sound scattering characteristics of corner reflectors. The acoustic scattering characteristics of non-orthogonal corner reflectors were studied. The pinch theorem idea was used to change the angle between standard corner reflectors (90°, 85°, and 80°), and a qualitative analysis was performed. The structural modeling software ANSYS was used to model and mesh the non-orthogonal dihedral and trihedral corner reflectors. The acoustic simulation software SYSNOISE was used to analyze the acoustic scattering characteristics of non-orthogonal dihedral and trihedral corner reflectors. Furthermore, far-field acoustic scattering characteristics were simulated and analyzed by the structural finite element and fluid boundary element methods. The acoustic scattering characteristics were compared with standard orthogonal corner reflectors under similar loading and acoustic field conditions. The acoustic scattering intensity of the target under different incident angles of sound waves and variation law of the target intensity with the frequency of the incident sound waves were obtained. The results showed that the acoustic scattering characteristics of orthogonal corner and orthogonal dihedral corner reflectors were better than those of non-orthogonal corner and trihedral corner reflectors, respectively. The production error of the dihedral corner reflector was less than 2° and will not have a substantial impact on the acoustic scattering characteristics.
- underwater corner reflector /
- production error /
- structural finite element method /
- fluid boundary element method /
- acoustic scattering /
- target strength

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参考文献(12)

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