时间域激发极化法非结构化三角网格有限元正演模拟  

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

作　　者：陈进超[1] 王绪本[1] 王丽坤[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《物探化探计算技术》2011年第4期411-417,347,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2008ZX05035-004-001)

摘　　要：这里分析了传统网格剖分方式的不足,提出采用非结构化渐变三角网格对求解区域进行离散,采用固定带宽LDLT分解法求解线性方程组。设计了非结构化渐变三角网格自动剖分程序,并针对固定点源测深装置的激发极化2.5维有限元正演模拟程序。通过理论模型试算,验证了程序的正确性与有效性,并对正演模拟的速度和精度进行了初步评价。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.

关 键 词：时间域激发极化 有限单元法 正演模拟 

分 类 号：P319.12[天文地球—固体地球物理学]