摘要
本文建立了在一维及二维地电断面上大地电磁场问题的边界积分方程。讨论了用边界单元法计算大地电磁异常的基本原理与方法技术,给出了边界剖分随不同频率电磁场的变化规律。计算结果及其与理论值对比表明,边界单元法可以成为计算大地电磁异常的实用方法。
In this paper, the boundary integral equations of the magneto- telluric field on one-dimensional and two-dimensional geoel- ectric sections are establishd. Basic principles and techniques of applying the boundary element method (BEM) in computing magn- etotelluric anomalies are discussed. When the boundary is divided into elements, the variational regulation of the elements length with the frequenee of magnetotelluric field is given. The calcul- ation results compared with the analytic results on some geoelec- tric sections indicate that BEM may be able to become a pracatci- al technique for calculating magnetotelluric anomalies.
