煤田地质与勘探2019，Vol.47Issue(1)：194-199,6.DOI:10.3969/j.issn.1001-1986.2019.01.030
线源直流电法有限元二维正演模拟
Finite element 2D forward modeling of DC method with line source
摘要
Abstract
In direct current prospecting, the forward calculation of 3D point source is complex and the calculation quantity is large, and using the Fourier transform can converted into 2D point source, but it is more complicated than that of 2D line source. This paper is based on Matlab programming, using the first boundary condition, and gives numerical solution of two-dimensional finite element of DC method with line source, through comparing with theoretical value of homogeneous half-space, the correctness of calculation results was verified. Then the high and low resistivity geoelectric models were built, the response of single side power supply and double side power supply were compared and analyzed respectively, and the corresponding apparent resistivity profile was obtained. The results show that unilateral power supply can accurately reflect the vertical position of the abnormal body, while bilateral power supply can more accurately reflect the horizontal position and the shape of the abnormal body, providing theoretical basis for actual production.关键词
线源直流电法/第一类边界条件/有限元/二维正演/单 (双) 边供电Key words
DC method with line source/the first boundary condition/2D finite element/forward modeling/unilateral (bilateral) power supply分类
天文与地球科学引用本文复制引用
解海军,李志强,栗升..线源直流电法有限元二维正演模拟[J].煤田地质与勘探,2019,47(1):194-199,6.基金项目
国家自然科学基金项目(41472234) （41472234）
