近岸海域上方动态舰船尾迹的多普勒谱特性  

Doppler Spectral Characteristics of Dynamic Ship Wakes over Nearshore Waters

作　　者：赵晔[1] 王富林 于少帅 杨天赐 任新成[1] 田炜[1] ZHAO Ye;WANG Fulin;YU Shaoshuai;YANG Tianci;REN Xincheng;TIAN Wei(School of Physics and Electronic Information,Yanan University,Yan’an 716000,China)

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《探测与控制学报》2024年第6期92-98,108,共8页Journal of Detection & Control

基　　金：国家自然科学基金项目(62261054,62361054);延安大学“揭榜挂帅”项目(2023JBZR-009);大学生创新创业训练计划项目(202310719005)。

摘　　要：由于舰船尾迹持续时间长且存在范围广,因此通过研究舰船尾迹进行目标探测具有一定的意义。采用线性滤波法结合文氏海谱生成了近岸有限深海域海面,并将其与动态开尔文舰船尾迹叠加,得到了时变近岸海面和上方开尔文尾迹的线性叠加模型。采用海面面元散射场模型对动态开尔文扰动近岸海面的多普勒谱特性进行仿真,重点讨论电磁波入射角为30°和80°两种情形下不同船速、风速、船向时的多普勒谱。数值计算结果表明,舰船的运行速度和船向会对近岸海面与上方动态尾迹叠加模型的多普勒谱特性造成较为直观的影响,海面风速的影响则较小。该研究可为海杂波环境下舰船尾迹的运动特征提取提供参考。In response to the long duration and wide range of ship wakes,researching ship wakes for target detection has certain significance.This article used linear filtering method combined with Wen s sea spectrum to generate nearshore finite depth sea surface,and overlay it with dynamic Kelvin ship wake to obtain a linear superposition model of time-varying nearshore sea surface and upper Kelvin wake.A surface panel scattering field model was used to simulate the Doppler spectrum characteristics of the dynamic Kelvin disturbance near the shore sea surface,with a focus on discussing the Doppler spectrum at different ship speeds,wind speeds,and ship directions for electromagnetic wave incidence angles of 30 degrees and 80 degrees.The numerical calculation results indicated that the operating speed and direction of the ship had a more intuitive impact on the Doppler spectral characteristics of the nearshore sea surface and the dynamic wake superposition model above,while the influence of sea surface wind speed was relatively small.This study provided a reference for extracting motion features of ship wakes in sea clutter environments.

关 键 词：有限深海域 Kelvin尾迹 多普勒谱 复合散射 

分 类 号：TN011[电子电信—物理电子学]