期刊文献+

基于MPI的二维大地电磁正演的并行计算 被引量:12

PARALLEL COMPUTATION OF 2-D MAGNETOTELLURIC FORWARD MODELING BASED ON MPI
下载PDF
导出
摘要 大地电磁二维正演对每一个频率分别进行计算,各频率对应的电磁场值间相互独立,根据这一特点可以将程序按频率划分粒度,将每个频点计算分配到各个进程同时进行计算,并行执行。文中给出了大地电磁二维有限元正演的并行算法,它结合了MPI的优点,采用主从并行模式、分频并行计算的并行方案来执行。为了检验编写的并行程序,对设计的2个模型进行试算,并与串行程序对比验证了该算法的可行性、正确性,为二维反演、三维正反演的并行计算提供了研究基础。 Nowadays, the 2-D inversion of magnetotelluric data has been put into practice, however, the 3-D inversion is still in its infancy, not because of the backward inversion methods or theories from the real yield but the lag of the hardware development. It is the huge amount of time to calculate in 2-D and 3-D inversion processes that traditional single-computer calculation speed is unacceptable. The most time-consuming part of the inversion is forward calculation, so it is of great significance to take parallel processing technology to improve the efficiency of parallel calculation. The program for 2-D magnetotelluric forward problems presented in this paper is based on the classic finite element method put forward by Wannamaker. It combines FORTRAN and MPICH 2 on Linux system in compilation. The forward computing for two-dimensional magnetotellurics is done separately in each frequency, and the value of electromagnetic field in the corresponding frequency is independent, therefore it is fit for frequency-decomposing parallel computing. This paper presents the two-dimensional magnetotelluric forward parallel algorithm, based on the finite element. Using the development tools of Fortran and MPICH 2,we write a parallel program that combines the advantages of MPI,and adopt the master-slave parallel mode and the parallel program of frequency-decomposing parallel computing. In order to verify the program, we designed two models, and compared with the serial program to validate the feasibility and accuracy of this algorithm,the result provides a research base for the parallel computation for two-dimensional inversion and three-dimensional forward and inversion.
出处 《地震地质》 EI CSCD 北大核心 2010年第3期392-401,共10页 Seismology and Geology
基金 国家深部专项(Sinoprobe010302) 国家自然科学基金(40974040)共同资助
关键词 大地电磁 MPI 二维 有限元 正演 magnetotellurics, MPI, two-dimensional, finite element, forward computation
  • 相关文献

参考文献9

二级参考文献38

  • 1陈小斌,赵国泽,詹艳.MT资料处理与解释的Windows可视化集成系统[J].石油地球物理勘探,2004,39(B11):11-16. 被引量:72
  • 2王鼎兴,庄伟强.一种实现并行计算的新主流技术──NOW[J].小型微型计算机系统,1995,16(2):29-34. 被引量:22
  • 3熊彬,罗延钟.电导率分块均匀的瞬变电磁2.5维有限元数值模拟[J].地球物理学报,2006,49(2):590-597. 被引量:72
  • 4胡建德 蔡纲.用三角形二次插值有限元法计算二维大地电磁测深曲线.石油地球物理勘探,1984,(4):358-367.
  • 5J H Coggon.Electromagnetic and Electric Modeling by the Finite Element Method[J].Geophysics,1971,36(1):132~155.
  • 6Willian L Rodi.A Technique for Improving the Accuracy of Finite Element Solutions for Magneto Telluric data[J].Geophysics,1976,44:483~506.
  • 7Philip E Wannamaker,John A stodt,Luis Rijoi.Two-dimentional Topographic Response in Magnetotellurics Modeled Using Finite Element[J].Geophysics,1986,51(11):2131~2144.
  • 8D F Pridmore,G W Hohmann,S H Ward,et al.An investigation of Finite Element Modeling for Electromagnetic and Electrical Data in Three Dimentions[J].Geophysics,1981,46:1009~1024.
  • 9徐世浙,地球物理学报,1995年,38卷,262页
  • 10徐世浙,地震学报,1985年,7卷,80页

共引文献149

同被引文献89

引证文献12

二级引证文献59

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部