| 大地电磁场正演计算中几个问题的探讨 |
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| 引用本文： | 欧阳联华,王家林,吴健生,于鹏.大地电磁场正演计算中几个问题的探讨[J].同济大学学报(自然科学版),2003,31(7):828-832. |
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| 作者姓名： | 欧阳联华 王家林 吴健生 于鹏 |
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| 作者单位： | 同济大学,海洋地质教育部重点实验室,上海,200092 |
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| 基金项目： | 国家重大基础研究发展基金资助项目 (G2 0 0 0 0 4670 2 -0 2 )，国家自然科学基金资助项目 (4 0 10 40 0 5 ) |
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| 摘 要： | 在有限元法中 ,插值函数、剖分密度以及电磁场在地表附近的垂向导数都是影响视电阻率计算精度的重要因素 .对此就三角形剖分线性插值和二次插值对视电阻率函数的计算精度进行了比较 ;讨论了不同的剖分密度对精度的影响 ;并就电磁场在地表附近的垂向导数的不同计算方法进行了讨论
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| 关 键 词： | 大地电磁场 正演 插值函数 剖分 视电阻率 |
| 文章编号： | 0253-374X(2003)07-0828-05 |
| 修稿时间： | 2002年11月12 |
Discussion of Some Problems Concerning Magnetotelluric Modeling by Finite Element Method |
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| OUYANG Lian-hua,WANG Jia-lin,WU Jian-sheng,YU Peng.Discussion of Some Problems Concerning Magnetotelluric Modeling by Finite Element Method[J].Journal of Tongji University(Natural Science),2003,31(7):828-832. |
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| Authors: | OUYANG Lian-hua WANG Jia-lin WU Jian-sheng YU Peng |
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| Abstract: | Several problems concerning magnetotelluric modeling have been discussed in this paper.In finite element method,interpolation function,mesh density and vertical differential of the electromagnetic fields near the surface are all the factors that can affect the precision of the apparent resistivities.This paper compares the results of the linear interpolation with those of quadratic interpolation.Then,how different mesh density affects the precision also has been studied.Finally,some methods of the computation of vertical electromagnetic differentials near the surface and their advantages and disadvantages are discussed. |
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| Keywords: | magnetotelluric fields modeling interpolation function mesh apparent resistivity |
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