转弯航行舰船开尔文尾迹散射特征研究  

Study on Kelvin wake scattering characteristics of turning ship

作　　者：闫佳楠 聂丁[1] 张民[1] YAN Jianan;NIE Ding;ZHANG Min(School of Physics,Xidian University,Xi'an 710071,China)

机构地区：[1]西安电子科技大学物理学院,陕西西安710071

出　　处：《中国舰船研究》2023年第4期129-139,共11页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(62171351,62001343);陕西省自然科学基础研究计划资助项目(2023-JC-YB-543);航空科学基金资助项目(2022Z017081007);高等学校学科创新引智计划资助项目(B17035)。

摘　　要：[目的]旨在研究转弯航行状态下舰船产生的开尔文尾迹及其电磁散射特征,为舰船非线性尾迹检测和识别提供理论支撑。[方法]基于已有的开尔文尾迹建模方法和坐标变换,根据转弯航行方向,获得转弯航行舰船产生的开尔文尾迹。利用半确定性面元散射模型(SDFSM)对转弯航行舰船产生的弧形开尔文尾迹进行雷达电磁散射特性仿真分析,计算对比海背景下直线航行舰船开尔文尾迹和转弯航行舰船开尔文尾迹在不同船速及航行角度条件下的面元散射系数分布。[结果]转弯航行舰船开尔文尾迹各成分波在几何模型上存在与直行尾迹不同的几何特征,复合直行开尔文尾迹及转弯航行开尔文尾迹不同成分波在垂直接收-垂直发射(VV)极化条件下的面元散射系数分布图中不同区域表现出具有显著差异的散射特征。[结论]开尔文尾迹散射系数分布图的亮暗度和尾迹不同成分波的波矢量方向与雷达视向的相对关系密切相关。研究结果可为舰船信息感知和探测识别以及隐身等应用提供理论依据。[Objective]This study focuses on the turning ship Kelvin wake and its electromagnetic scatter-ing characteristics in order to provide a theoretical foundation for the detection and recognition of nonlinear ship wakes.[Methods]Based on the existing Kelvin wake geometric modeling and coordinate transforma-tion methods,a turning ship Kelvin wake is obtained by the continuous changing of a ship's heading.The semi-deterministic facet scattering model(SDFSM)is then used to simulate the electromagnetic scattering characteristics of the arc-shaped Kelvin wake,and calculations and comparisons are performed of the distribu-tion of the facet scattering coefficients of a straight Kelvin wake and arc-shaped Kelvin wake under different navigation speeds and headings.[Results]The various kinds of wave components of a turning ship Kelvin wake are different from those of a straight Kelvin wake.At the same time,the vertical reception-vertical trans-mission(VV)scattering characteristics of a composite straight Kelvin wake and the counterparts of a compos-ite turning ship Kelvin wake,which are shown in the figures of scattering coefficient distribution,exhibit sig-nificantly different features.[Conclusions]The brightness of the distribution of the Kelvin wake scattering coefficient and the wave vector directions of the different components of the wake are closely related to the re-lative relationship of radar direction.The results of this study can provide a theoretical basis for applications such as ship information perception,detection,recognition and stealth.

关 键 词：舰船尾迹 转弯舰船 电磁散射 散射特征 

分 类 号：U675.79[交通运输工程—船舶及航道工程] TN957.52[交通运输工程—船舶与海洋工程]