稳定电流场有限元法模拟研究

THE REAL-LIKE 2D FEM MODELING RESEARCH ON THE FIELD CHARACTERISTICS OF DIRECT ELECTRIC CURRENT FIELD

以直流电场有限元方法为基础，从二维电性介质线源有限元模拟出发，深入探讨了改进复杂电性结构理论模型有限元正演资料仿真性、有效性的方法．首先，用加里津（Garlerkin）方法推导了稳定电流场的有限元方程，得到了人为截断的边界条件；研究了快速形成系数矩阵的模块化方法以及自动识别地电参数和电性分界面的网格自动剖分软件燃后讨论了不同边界情况下的数值模拟情形，指出了各自的物理含义及吸收效果，最后由模型计算对本文方法进行了检验．

In this paper, we probe deeply into the real-like effectivity method for complexelectric media of 2--D linear source by the finite element method. First we useGarierkin's method to derive the 2--D finite element equations for direct electric fieldwith the anificial boundary terms, then discuss separately the numerical modeling fordifferent artificial boundary condition, give their physical meaning and absorbingeffection. The effectivity has been proved with typical examples.