【摘要】 在有源变频测深 (包括可控源音频大地电磁测深 CSAMT)的三维有限元正演中 ,应用了吸收边界条件和边元有限元算法 ,计算精度为 3%左右 ,基本上可满足电偶极源三维地电模型情况下频率电磁测深响应特征的分析。同时由于广义变分概念的引入 ,可使泛函的变分原理应用于有耗媒质电磁场问题更多还原

【Abstract】 Absorbing boundary conditions and edge element finite element method are used in 3 D active frequency electromagnetic sounding(including CSAMT) modeling.Benchmark calculation shows that the accuracy of the method is about 3%,which is acceptable for the purpose of analyzing response characteristics of frequency sounding with an electric diploe source for 3 D modeling.Besides,the general variation principle was introduced to solve electromagnetic problem in lossy media.更多还原