电偶源频率电磁测深三维地电模型有限元正演  

FINITE ELEMENT SOLUTION OF THREE DIMENSIONAL GEOELECTRIC MODELS IN FREQUENCY ELECTROMAGNETIC SOUNDING EXCITED BY A HORIZONTAL ELECTRIC DIPOLE

作　　者：阎述[1] 陈明生[2] 

机构地区：[1]西安交通大学电子与信息工程学院微波与光通信研究所,710049 [2]煤炭科学研究总院西安分院,710054

出　　处：《煤田地质与勘探》2000年第3期50-56,共7页Coal Geology & Exploration

基　　金：国家自然科学基金资助项目 !(编号 :496 742 3 9)

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 。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.

关 键 词：三维地电模型 有限元法 电偶源频率电磁测深 

分 类 号：P631.325[天文地球—地质矿产勘探]