有限元-边界元耦合法计算任意截面形状二维介质柱雷达散射截面  

Calculation of Radar Cross Section of Arbitrarily Shaped Two-dimensional Dielectric Cylinder by Using Coupling of Finite Element-boundary Element Method

作　　者：周平[1] 朱汉清[1] 

机构地区：[1]淮阴师范学院物理系,江苏淮安223001

出　　处：《淮阴师范学院学报（自然科学版）》2004年第4期281-284,共4页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：江苏省教育厅自然科学基金资助项目(02KJD140007)

摘　　要：应用有限元 边界元耦合法计算任意截面形状二维介质柱的雷达散射截面.对介质柱内、外区域分别应用有限元和边界元法进行分析,然后通过场的连续性进行耦合,形成待求矩阵方程,最后应用内观法结合多波前法求解该方程.作为算例,分别计算了几种柱体的雷达散射截面.数值结果表明,由于使用了内观法结合多波前法解非对称稀疏矩阵,大大减少了计算时间.In this paper, the coupling of finite element method (FEM) and boundary element method (BEM) is used to calculate radar cross section(RCS) of arbitrarily shaped two-dimensional dielectric cylinder. The interior problem involving medium is solved by the FEM and the exterior problem is solved by the BEM. By using the continuities of tangential field condition to obtain the matrix equation. Last, the inward-looking approach and multifrontal method are applied to solve the equation. As the verification example, the RCS of four kinds of dielectric cylinders are calculated. Numerical results demonstrate that CPU time is greatly reduced by using inward-looking approach and multifrontal method to solve the equation.

关 键 词：有限元法 边界元法 内观法 电磁散射 雷达散射截面 

分 类 号：TN122[电子电信—物理电子学]