基于左手材料的翼面隐身结构设计及优化  

Design and Optimization of Low Detectable Wing Structure Based on LHM

作　　者：徐含乐[1] 祝小平[1] 周洲[1] 任武[2] 

机构地区：[1]西北工业大学无人机特种技术重点实验室,陕西西安710072 [2]西安航天动力研究所,陕西西安710100

出　　处：《航空学报》2014年第12期3331-3340,共10页Acta Aeronautica et Astronautica Sinica

基　　金：部级项目~~

摘　　要：翼面隐身结构能同时满足飞行器机翼气动、结构和隐身的要求,但在空间有限的机翼中应用时,由于结构特点使其隐身效果受到限制。为了解决该问题,在传统隐身结构中加入左手材料(LHM)进行改进。首先选取一种典型的LHM,从隐身设计角度出发,利用其雷达散射截面(RCS)计算不同入射角度下的后向吸收率,对其电磁特性进行研究。然后根据LHM的电磁特性,将其应用于翼面隐身结构,在相同的RCS减缩效果下,应用LHM可有效降低隐身结构体积。最后,为了进一步提高隐身效果,提出一种夹芯型LHM翼面隐身结构,并对该隐身结构中的结构参数利用代理模型进行优化。研究结果表明,相较金属翼面段RCS降低了15dB以上,较相同结构的翼面隐身结构RCS降低了10dB以上。Low detectable wing structure can meet the aerodynamic,structure and stealth requirement of aircraft wing,but when it is applied to the wing with limited space,its stealth effect is restricted because of its structural characteristics.In order to solve this problem,left-handed material （LHM） is added in the traditional stealth structure in this paper.Firstly,from the viewpoint of stealth design,a typical LHM is selected to study its electromagnetic property by using the backward absorption rate which is calculated from its radar cross section （RCS） at different incidence angles.Then the LHM is used in the wing stealth structure according to its electromagnetic property.With the same RCS reduction effect,the application of LHM can effectively reduce the volume of the stealth structure.Finally,to further enhance the RCS reduction effect,a sandwich low detectable wing structure with LHM is put forward and the structure parameters are optimized by the surrogate model.The results show that the optimal structure RCS is reduced by 15 dB compared to the RCS of metal wing; it is reduced by more than 10 dB compared to the same wing structure without LHM.

关 键 词：左手材料 隐身结构 优化 RCS 代理模型 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]