基于改进板块元法的标准潜艇收发分置目标强度分析

冯雪磊; 李晓伟; 李 锦; 陈南若

doi:10.11993/j.issn.2096-3920.2018.03.008

基于改进板块元法的标准潜艇收发分置目标强度分析

doi: 10.11993/j.issn.2096-3920.2018.03.008

中国船舶科学研究中心深海载人装备国家重点实验室, 江苏无锡, 214082

基金项目: 国家自然科学基金(11772304)

详细信息

作者简介:
冯雪磊(1989-), 男, 博士, 工程师, 主要研究方向为声学换能器设计.

中图分类号: TJ6; TB566
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出版历程
- 收稿日期: 2017-11-25
- 修回日期: 2018-01-30
- 刊出日期: 2018-06-30

Analysis on Bistatic Target Strength of Benchmark Submarine Based on Improved Planar Element Method

State Key Laboratory of Deep-Sea Manned Vehicles, China Ship Scientific Research Center, Wuxi 214082, China

摘要

摘要: 收发分置目标强度是双基地和多基地声呐的重要参数, 文中采用改进板块元方法分析了具有复杂结构的标准潜艇收发分置目标强度。首先, 将收发合置的改进板块元方法推广到收发分置的情形, 推导并验证收发分置的改进板块元方法; 然后, 在考虑二次散射和遮挡的情况下, 分析包含外壳、内壳和肋板的双壳体标准潜艇的中高频收发分置目标强度; 最后, 分析了收发分置目标强度的统计特性。结果表明: 1) 改进板块元方法在分置角不大时具有较好的准确度, 避免了坐标变换导致的大量计算, 提高了计算的稳定性; 2) 对于双壳体标准潜艇, 在多数情况下潜艇外壳的一次散射是目标强度的主要贡献, 而外壳的二次散射较小, 当入射方向和散射方向关于艏部或者艉部对称时, 由于镜面反射, 肋板和内壳的贡献较大; 3) 文中计算频率目标强度的统计特性随分置角变化不大。文中的研究可为水中兵器多基地和双基地声呐设计提供依据。
- 标准潜艇 /
- 板块元 /
- 收发分置声呐 /
- 目标强度
Abstract: Bistatic target strength is an important parameter of bistatic or multistatic sonar. This paper uses an improved bistatic planar element method to analyze benchmark submarine. Firstly, by applying the improved monostatic planar element method to bistatic case, an improved bistatic planar element method is derived and then compared with analytic method. Secondly, the target strength of the benchmark submarine containing external hull, internal hull and rib plates is analyzed considering secondary scattering and occlusion. Thirdly, the statistical characteristics of the bistatic target strength are analyzed. The results indicate that: 1) the improved bistatic planar element method has high accuracy when the bistatic angle is not very large, and it can avoid huge amount of calculation due to coordinate conversion and improve computational stability; 2) for the double-hull benchmark submarine, the primary scattering of the external hull contributes mainly to the target strength in most cases, while the secondary scattering of the external hull is much weaker, and when the incident and scattering directions are symmetrical about the stern or stem direction, the scattering of the internal hull and rib plates contributes a lot due to the mirror reflection; and 3) the statistical characteristics of the bistatic target strength vary slightly with the bistatic angle. This work may provide a reference for the design of bistatic or multistatic sonar for undersea weapons.
- benchmark submarine /
- planar element method /
- bistatic sonar /
- target strength

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