Three-dimensional FD-CSEM forward modeling parallel computing based on finite-element method

被引：0
|
作者：
Liu J.-X. [1 ,2 ]
Liu P.-M. [1 ,2 ]
Liu Y. [3 ]
Tong X.-Z. [1 ,2 ]
机构：
[1] School of Geosciences and Info-physics, Central South University, Changsha
[2] Hunan Key Laboratory of Non-ferrous Resources and Geological Hazard Detection, Changsha
[3] Ministry of Education and College of Marine Geosciences Ocean University of China, Qingdao
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 12期
基金：
中国国家自然科学基金;
关键词：
FCSEM; Finite element; MPI; Parallel computing; Three-dimensional;
D O I：
10.11817/j.ysxb.1004.0609.2021-39194
中图分类号：
学科分类号：
摘要：
In this paper, a parallel algorithm of the three-dimensional(3D) modeling of frequency domain controlled-source electromagnetic(FCSEM) with FEM was implemented. First, from the Maxwell equations, its boundary value problem was derived, and then transformed into variational form from which finite-element linear equations were derived. The SSOR-PCG iterative method was used to solve large-scale linear equations. Aiming at the low speed of 3D finite element numerical simulation of electromagnetic field in frequency domain and the independent calculation of each frequency, MPI parallel technology was adopted to realize the parallel algorithm based on frequency point. Then the algorithm was used to simulate the uniform half space model, and compared the calculated results with the analytical solutions to verify the accuracy and validity of the algorithm. Finally, the example model was simulated with three-dimensional electromagnetic responses. The results indicate that the method can be applied for solving three-dimensional electromagnetic responses. The algorithm has been demonstrated, which can be effective to modeling the geo-electrical structures. © 2021, China Science Publishing & Media Ltd. All right reserved.
引用
收藏
页码：3779 / 3788
页数：9
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