2-D anisotropic magnetotelluric numerical simulation under undulating terrain based on meshfree radial point interpolation method

摘要: In view of the problem that widespread existing undulating terrain and anisotropic in actual geophysical prospecting, we propose a numerical simulation method which only needs discrete nodes to construct shape function. Assuming electrical spindle axis underground medium is perpendicular plane, another parallel conductivity tensor model. From 2-D magnetotelluric boundary value problem, derive corresponding equivalent linear equation based on radial point interpolation meshfree method, function constructed by MQ-RBF function, coefficient matrix compressed stored MATLAB's own sparse storage The equations are solved BICGSTAB algorithm with incomplete LU decomposition. results show severely affects distribution electromagnetic field greatly changes original anomaly characteristics, topography effect observation data far greater than influence anisotropy itself.