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1、摘要本文將奢限元(FEM),邊界積分方程(BE)混合方法應(yīng)確予電磁敲射問(wèn)題。在二絨和三維數(shù)射問(wèn)題中,分別應(yīng)用二維結(jié)點(diǎn)FEM/13I混合方法和三維矢擻FEM/BI混臺(tái)方法。蠢隈元單元使用二階益邊瑟邊形肇元和匿醋體矢量單元。探討和研究應(yīng)用該混合方法分析復(fù)雜目標(biāo)電磁散射特性的實(shí)現(xiàn)方法以及該混合方法靜精凄、簸率幫逶磁瞧的撬黼等闖瑟。討論了鼗篷實(shí)域技術(shù)。提蠢了~靜霞{毛的有限元剖分方案,這種方法能夠減少剖分出的未知登。開(kāi)發(fā)了應(yīng)用程序。計(jì)算結(jié)采與精確羹袋或文敷結(jié)采鐫合褥綴辯。芙毽溺:毫隈元,邊爨積分,窀磁教菇磊bstr
2、actApplicationofhybridfiniteelementmethodPootmdaryintegralmethod(FEM/BI)toEMscatteringproblemsisstudiedinthispapenNodalFEM/Btisemployedfortwo—dimensionalproblems,andvectorFEM/BIforthree.dimensionalproblems.Second—orderquadrilateralnodalfiniteelementsandtet
3、rahedratedgefiniteelementsareusedforcomputingscatteringfromtwo—andthree.dimensionalstructures,respectivelySchemesonimplementingthehybridmethodtoanalyzeEMscareringpropeaiesofcomplexobjectsisdiscussed,andimprovementoftheaccuracy,efficiencyandversatilityofthe
4、hybridmethodisalsodiscussed.Anoptimtmxschem。forconstructingfiniteelementmeshesisproposed,whichcanreducelhesumofthetlnknowllsNumericaltechniqueisdiscussed,andapplicationprogramisdevelopedforE潮scatteringproblems.Numericalresultsareinexcellentagreementwithth。
5、s。presentedbyotherpapersorexactsolutions.Keywords:finiteelementmethod(FEM)tboundaryintegral(B1),electromagneticseattering摘要本文將有限元(FEM)/邊界積分方程(BI)混合方法應(yīng)用于電磁散射問(wèn)題。在二維和三維散射問(wèn)題中,分別應(yīng)用二維結(jié)點(diǎn)FEM/BI混合方法和三維矢量FEM/BI混合方法。有限元單元使用二階曲邊四邊形單元和四面體矢量單元。探討和研究應(yīng)用該混合方法分析復(fù)雜目標(biāo)電磁散射特性的實(shí)
6、現(xiàn)方法以及該混合方法的精度、效率和通用性的提高等問(wèn)題。討論了數(shù)值實(shí)現(xiàn)技術(shù)。提出了一種優(yōu)化的有限元剖分方案,這種方法能夠減少剖分出的未知量。開(kāi)發(fā)了應(yīng)用程序。計(jì)算結(jié)果與精確結(jié)果或文獻(xiàn)結(jié)果吻合得很好。關(guān)鍵詞:有限元,邊界積分,電磁散射AbstractApplicationofhybridfiniteelementmethod/boundaryintegralmethod(FEM/BI)toEMscatteringproblemsisstudiedinthispaper.NodalFE/vl/BIisemploye
7、dfortwo—dimensionalproblems,andvectorFEM/BIforthree-dimensionalproblemsSecond—orderquadrilateralnodalfiniteelementsandtetrahedraledgefiniteelementsareusedforcomputingscatteringfromtWO—andthree—dimensionalstructures,respectively.Schemesonimplementingthehybr
8、idmethodtoanalyzeEMscaaeringpropertiesofcomplexobjectsisdiscussed,andimprovementoftheaccuracy,efficiencyandversatilityofthehybridmethodisalsodiscussedAnoptimumschemeforconstructingfiniteelementmeshesispropose