Study Of 3-D Forward Modeling Of DC Resistivity Method Using Multi-grid Method

As a kind of quick computing method, the theory of multi-grid method is based on that grid can eliminate the wave length error corresponding grid step size. Using iterating method, this method solve equation group which come from the dispersing partial differential equation group.The main applying domains of multi-grid method include simulating electrostatic field, fluid medium, wave field, and so on. This method has little application in the domain of forward and inverting modeling of geophysics. In this article, I do some research about the application of this method in the forwarding modeling of electric method.On the basis of analyzing a lot of literature, I bring forward a kind of unequal interval dispersing method to disperse the geophysical model. This method applies tightening grid closing to the anomalous body, and usual grid apart from anomalous body. I also bring forward the choosing of interpolating and confining operator, and so on. The interpolating and confining operator of the unequal interval dispersing geophysical model are stereotyped .And the program codes for poission equation are written in C environment.These entire jobs can make the multi-grid method viable and convenience in the forward modeling of electric method. I believe it can improve iterating speed greatly.