UNSTRUCTURED TRIANGULAR GRID FINITE ELEMENT METHOD FOR TIME DOMAIN INDUCED POLARIZATION FORWARD MODELING

Based on the analysis of the deficiencies of traditional meshing, unstructured gradient triangulation method was proposed for solution area triangulation. Fixed bandwidth LDLT decomposition method was used to solve linear equations. Procedures of automatic unstructured gradient triangulation and induced polarization 2.5D forward modeling of finite element method for fixed point source sounding device has been designed. The result of theory model test has verified the correctness and effectiveness of this method, and the speed and accuracy of forward modeling were evaluated.