区域分裂方法应用于屏蔽门的电磁泄漏分析

Application of Domain Decomposition Method in Electromagnetic Leakage Analysis

电大尺寸和复杂物体的电磁泄漏分析是计算电磁学的一个重要的研究课题 ,区域分裂方法 (DDM)作为微分方程数值求解的新技术十分适宜求解电大尺寸的电磁场问题。提出了一种基于区域分裂方法和有限元方法 (FEM)的混合算法来分析电磁防护中的电磁屏蔽门问题 ,在屏蔽门的边界和区域分裂的虚拟边界上分别利用吸收边界条件和传输边界条件 ,具有良好的收敛性质 ,数值结果表明了这一混合算法的有效性 ,同时区域分裂方法十分适合于计算机的并行计算 ,所以这里给出的方法适合于计算电大尺寸物体的电磁计算问题。

Electromagnetic leakage analysis of electrically large and complex objects have become an indispensable part of computaional Electromagnetism; As a new technique for solving differential equations, the domain decomposition method (DDM) plays an important role in the solution of large problems. In this paper, a mixed approach (DDM FEM) based on the domain decomposition method and the finite element method (FEM) is presented to analyze electromagnetic leakage problem of shield gates. An ABC boundary condition and a transmssion boundary condition to the boundary and the dummy boundary respectively are used. The DDM is well suitd for numerical implementation on parallel computers. Numerical results are presented to demonstrate the validity of this approach.