| 有耗介质中电磁波传播的时域有限差分法 |
| |
| 引用本文： | 李庆伟,曹俊兴,杜兴忠.有耗介质中电磁波传播的时域有限差分法[J].勘探地球物理进展,2007,30(3):185-189. |
| |
| 作者姓名： | 李庆伟 曹俊兴 杜兴忠 |
| |
| 作者单位： | 成都理工大学信息工程学院,四川成都,610059 |
| |
| 基金项目： | 国家自然科学基金资助项目(40574032) |
| |
| 摘 要： | 在推导有耗介质中Maxwell方程差分格式的基础上,详细讨论了时域有限差分法（FDTD）中主要参数的取值原则。对总场边界条件进行了改进,使入射波的泄漏很小,且不用对总场区的4个角点单独处理。讨论了简便的PML条件,避免了Berenger完全匹配层中场分裂过程。采用文中所介绍的方法,对地下有耗介质的理论模型进行了FDTD正演模拟,模拟结果可以反映地下有耗介质的有用信息,验证了该模拟技术的正确性和可靠性。
|
| 关 键 词： | 时域有限差分法 总场边界条件 完全匹配层 有耗介质 |
| 文章编号： | 1671-8585（2007）03-0185-05 |
| 收稿时间： | 2006-11-2 |
| 修稿时间： | 2006-11-022007-01-19 |
FDTD method for propagation of electromagnetic wave in lossy media |
| |
| Li Qingwei,Cao Junxing,Du Xingzhong.FDTD method for propagation of electromagnetic wave in lossy media[J].Progress in Exploration Geophysics,2007,30(3):185-189. |
| |
| Authors: | Li Qingwei Cao Junxing Du Xingzhong |
| |
| Affiliation: | College of Information Engineering, Chengdu University of Technology, Chengdu 610059, China |
| |
| Abstract: | After deduction of difference scheme of Maxwell's equation in lossy media,this paper discussed the determination of parameters in finite difference time domain(FDTD)method in detail.The modifications to the total field boundary condition decrease the leakage of incident waves,and lead to no disposal of the four vertices in the total field.This paper discussed the improved absorbed boundary condition of perfectly matched layer(PML),which avoids the splitting of wave components in normal Berenger PML.FDTD forward modeling was carried out on theoretical models of lossy media.The results depict the useful information in lossy media,which demonstrates the correctness and reliability of the proposed method. |
| |
| Keywords: | finite difference time domain total field boundary condition perfectly matched layer lossy medium |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《勘探地球物理进展》浏览原始摘要信息 |
|
点击此处可从《勘探地球物理进展》下载全文 |
|
