运动状态下舰船本体X波段RCS统计特征分析  

Analysis of X-band RCS statistical characteristics of ship body in motion state

作　　者：杜晓佳[1] 李鹏[1] 倪家正 闫红州 史霏霏 DU Xiaojia;LI Peng;NI Jiazheng;YAN Hongzhou;SHI Feifei(China Ship Development and Design Center,Wuhan 430064,China;Naval Research Academy,Beijing 100161,China)

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]海军研究院,北京100161

出　　处：《中国舰船研究》2023年第1期163-169,共7页Chinese Journal of Ship Research

摘　　要：[目的]为明确舰船运动对实船雷达散射截面(RCS)测量统计结果干扰的情况,开展各种运动状态下舰船本体X波段RCS的统计特征分析。[方法]构建低海况运动状态下舰船本体动态RCS仿真方法,以DTMB 5415水面舰船标准模型为基础,构建水动力仿真和电磁散射统一模型,获取在水平入射方向上X波段雷达波探测的舰船动态RCS数据,分析统计时间、海况、航速和浪向角对RCS统计特征的影响边界及影响规律。[结果]舰船本体动态RCS统计特征与静止状态下的存在差别;在低海况下,舰船总的RCS特征值受海况、航速及浪向角的影响范围在0.9 dB以内;舰船特征方向上的RCS对浪向角变化的较为敏感,并随着海况的增加逐渐降低。[结论]研究成果有助于掌握舰船运动对实船RCS测量统计特性的干扰情况,可为实船RCS测量工况的选择提供支撑。[Objective] In order to clarify the interference of ship movement on the radar cross section(RCS) measurement statistics of a real ship, the statistical characteristics of ship body X-band RCS under various motion states are analyzed.[Methods]A dynamic RCS simulation method of a ship body under low sea state motion is established, and a unified model of hydrodynamic simulation and electromagnetic scattering is created on the basis of the DTMB 5415 benchmark surface ship model. The dynamic RCS data of ships detected by X-band radar at a horizontal incident angle are obtained, and the influence boundaries and rules of statistical time, sea state, speed and sea wave direction on the statistical features of RCS are analyzed. [Results] The results show that the statistical characteristics of the dynamic RCS of a ship body are different from those in a static state. The influence range of the general values of RCS under low sea state, speed and wave angle is within 0.9 dB. The RCS of a ship’s characteristic direction is sensitive to changes in the sea wave direction angle, and decreases gradually with the increase of the sea state.[Conclusions]The results of this study can provide references for better understanding the interference of ship motion on the statistical characteristics of RCS measurement, and support the selection of real ship RCS measurement conditions.

关 键 词：舰船 海浪扰动 雷达散射截面 标准船模 

分 类 号：U662.2[交通运输工程—船舶及航道工程]