| 基于非正交网格的带地形三维瞬变电磁场模拟 |
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| 引用本文： | 邱稚鹏,李展辉,李墩柱,黄清华.基于非正交网格的带地形三维瞬变电磁场模拟[J].地球物理学报,2013,56(12):4245-4255. |
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| 作者姓名： | 邱稚鹏 李展辉 李墩柱 黄清华 |
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| 作者单位： | 1. 北京大学地球与空间科学学院地球物理学系, 北京 100871;2. 美国加州理工学院地球与行星科学系, 美国加州帕萨蒂纳 91125 |
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| 基金项目： | 国家杰出青年基金项目(41025014);科技部国际合作项目(2010DFA21570)资助 |
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| 摘 要： | 本文采用非正交网格时间域有限差分（FDTD）算法开展带地形瞬变电磁场的正演研究，并提出了一种采用非等权投影的改进非正交网格算法，提高了带地形瞬变电磁场三维正演算法的精度.对不同地形模型的数值模拟结果表明，地形的深度、宽度以及地形与源的相对位置等都可能对瞬变电磁场产生影响.
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| 关 键 词： | 瞬变电磁法 地形效应 时间域有限差分 非正交网格 |
| 收稿时间： | 2013-05-03 |
Non-orthogonal-Grid-based three dimensional modeling of transient electromagnetic field with topography |
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| QIU Zhi-Peng,LI Zhan-Hui,LI Dun-Zhu,HUANG Qing-Hua.Non-orthogonal-Grid-based three dimensional modeling of transient electromagnetic field with topography[J].Chinese Journal of Geophysics,2013,56(12):4245-4255. |
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| Authors: | QIU Zhi-Peng LI Zhan-Hui LI Dun-Zhu HUANG Qing-Hua |
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| Institution: | 1. Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871, China;2. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, America |
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| Abstract: | We applied the non-orthogonal grid finite difference time domain (FDTD) method to the 3D Transient electromagnetics (TEM) simulation with topography. We also presented a modified non-orthogonal grid FDTD method taking into account a weighted projection technique. The numerical simulation results based on various topographical models indicate that the topographical parameters such as the depth, width and source distance could affect the simulated TEM field. |
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| Keywords: | Transient electromagnetics Topography effect Finite Difference Time Domain(FDTD) Non-orthogonal grid |
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