摘要
介绍了联合运用积分方程法与有限元法(简称混合法)来计算三维非均匀介质中电磁场分布的理论方法,并进行了数值模拟实验。混合法的原理是引入一个包围非均匀目标体的虚构边界,在边界内部的场用有限元法模拟,在边界外部(包括边界)的场用积分方程表达,二者在边界上通过场的连续性耦合起来。数值实验结果表明,混合法既能显著地减小网格规模,又能灵活地模拟复杂的介质情况,且计算精度较高。
This paper introduces a hybrid algorithm to model electromagnetic field in inhomogeneous medium by combining integral equation method and finite element method (FEM).In the hybrid algorithm,we use FEM to model the EM field in the interior domain,and then use the integral equation to compute the field on the boundary(to provide an artificial boundary condition for FEM system),and the finite element approximation is also convenient for deriving discrete equations of the integral equation.At last,we develop the 3D programs for the hybrid algorithm,and test them using numerical experiments.
出处
《物探化探计算技术》
CAS
CSCD
2007年第2期99-103,85,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金项目(40274019)
关键词
积分方程法
有限元法
混合法
电磁场
integral equation method
finite element method
the hybrid algorithm
electromagnetic field
