典型布局飞机电磁散射特性数值计算研究  

Numerical Study on Electromagnetic Scattering Characteristics of Aircraft Typical Layout

作　　者：刘战合 王菁 姬金祖[2] 王晓璐 赵辉 Liu Zhanhe;Wang Jing;Ji Jinzu;Wang Xiaolu;Zhao hui(School of Aeronautic Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]郑州航空工业管理学院航空工程学院,郑州450046 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《航空工程进展》2018年第3期341-347,共7页Advances in Aeronautical Science and Engineering

基　　金：国家重点基础研究计划(973计划)(61320);航空科学基金(2016ZA55001);河南省科技攻关计划(182102210444;152102210137);郑州航空工业管理学院青年骨干教师资助计划(2017-12)

摘　　要：电磁隐身对飞行器战场生存力具有重要影响,作战任务不同,对应的飞行器布局形式也不同,而飞行器布局形式会影响其电磁散射特性。建立四种典型布局形式和电磁模型,基于物理光学法,数值模拟不同布局飞行器的RCS曲线,并分析RCS分布特点;对常规和特殊布局模型,研究其电磁散射的频率响应特性。结果表明:飞机布局决定RCS分布形式,在前向角域内,布局A-1、A-2、B、C、D的电磁隐身性能呈震荡提高趋势,RCS均值从7.770 0dBsm震荡降低至-30.067 3dBsm,布局B的RCS均值为-10.434 7dBsm;而不同布局的后向和周向角域电磁隐身性能依次提高,后向RCS均值由常规布局的22.702 5dBsm缩减为-25.093 8dBsm,周向由7.039 1dBsm缩减为-15.137 3dBsm;在高频区域,频率增加对RCS曲线分布特点影响较小,但曲线震荡性更加明显,RCS算术均值降低。Electromagnetic stealth has an important impact on survivability of aircraft.The layout of the corresponding aircraft is different,and the layout of aircraft will affect the electromagnetic scattering characteristics.Four kinds of typical layouts and electromagnetic models of aircraft are established.Based on physical optics method,the RCS curves of different layout aircraft are simulated numerically,and the distribution characteristics of RCS are also analyzed.Besides,the frequency response characteristics of electromagnetic scattering are studied for conventional and special layout models of aircraft.The results show that the aircraft layout determines the distribution of RCS.In the angular domain of nose direction,the electromagnetic stealth performance of layouts A-1,A-2,B,C and D tends to be increased in oscillation,and RCS mean value dropped from 7.770 0 dBsm to-30.067 3 dBsm,the RCS mean value of layout B is-10.434 7 dBsm.And the electromagnetic stealth performance of rearward and circumferential direction of different layouts are increased in turn.The RCS mean values in rearward direction are reduced from 22.702 5 dBsm of conventional layout to-25.0938 dBsm,and RCS mean values in circumferential direction are reduced from 7.039 1 dBsm to-15.137 3 dBsm.In high frequency region,the increase of frequency has small effect on distribution of RCS curves,but oscillation of curves is more obvious,and RCS arithmetic mean value decreases with the change of frequency.

关 键 词：布局 电磁散射 隐身 飞行器 RCS 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程] TN011[电子电信—物理电子学]