直流电阻率法的三维有限元无限元数值分析

Numerical analysis for three-dimensional resistivity model by using finite element/infinite element methods

摘要: 针对直流电阻探测法的三维数值解析中所存在的问题,提出了用有限元、无限元相结合来计算三维稳定电流场的方法。本方法不但有效考虑了三维半无限空间边界的影响,还可充分发挥有限元法在模拟三维地形方面的优越性。文中给出了用于三维稳定电流场计算的有限元、无限元的基本公式,并计算分析了有地下埋设物的数值试验和现场试验例。计算结果充分显示了本文提案方法的实用性。

Abstract: The finite element/infinite element methods (FEM/IEM) were used to calculate the three-dimensional resistivity modeling in mapping surveys. The basic control equations of the FEM/IEM were given in this paper. And both synthetic and field data of 3D resistivity models were analyzed. The calculated results show that this method gives a good approximation for the actual 3D resistivity structure of underground.