粗糙面上方三维目标复合散射的并行IPO方法研究  

Investigation on Composite Scattering from 3D Object Above Rough Surface by Parallel IPO Method

作　　者：李娟[1] 刘锐 郭立新[1] 李科[1] 柴水荣 孟肖[1] Li Juan;Liu Rui;Guo Lixin;Li Ke;Chai Shuirong;Meng Xiao(Xidian University,Xi’an 710071,China;AVIC Leihua Electronic Technology Research Institute,Wuxi 214063,China)

机构地区：[1]西安电子科技大学,陕西西安710071 [2]航空工业雷华电子技术研究所,江苏无锡214063

出　　处：《航空科学技术》2020年第6期85-90,共6页Aeronautical Science & Technology

基　　金：航空科学基金(20172081009,20170181004);国家自然科学基金(61971338,41806210)。

摘　　要：本文采用迭代物理光学法(IPO)研究二维粗糙面与上方三维目标的复合电磁散射,其中目标和粗糙面对入射波的一次散射均由物理光学法(PO)计算,二者之间耦合散射采用惠更斯原理和迭代策略求解。由于三维复合模型的电磁散射仿真将产生海量数据,本文采用基于消息传递接口(MPI)平台的并行技术提高计算效率。最后利用基于MPI的并行IPO方法数值计算了二维粗糙面与其上方球、导弹等目标的复合散射,并与商用软件、有限元-基尔霍夫法(FEM-KA)的结果进行了对比,结果表明在大多数散射角范围内两种方法的结果具有很好的一致性。In this paper,the composite scattering from a 3D object above 2D rough surface is investigated by the iterative physical optics(IPO).In present method both the scatterings of object and underlying rough surface are calculated by the PO method.And the mutual couplings between them are solved by the equivalence principle and iterative strategy.The geometry model of rough surface and object are meshed by triangular patches,which lead to enormous data for 3D composite model.The message-passing-interface(MPI)-based parallel technology is used to improve calculative efficiency.The composite scattering from an object(sphere,missile)above 2D rough surface is calculated and compared with the results by commercial software and hybrid FEM-KA method.The results indicate that the two methods match very well for most observed angles.

关 键 词：粗糙面 目标 复合散射 IPO 

分 类 号：TN011[电子电信—物理电子学]