Algorithm study of transient response of vertical magnetic bipolar source in whole space plane layered medium

作     者：HU Bo YUE Jian-hua YANG Hai-yan 

作者机构：School of Resource and Geoscience China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2009年第19卷第1期

页      面：120-123页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Project 40674074 supported by the National Natural Science Foundation of China 

主　　题：mining transient electromagnetic method whole space magnetic bipolar source Hankel transform 

摘      要：For some time, whole space feature as a theoretical problem has been a puzzle in mining transient electromagnetic method （TEM）. We have introduced a detailed method of calculating the transient response of a vertical magnetic bipolar source in a whole space plane layered medium in order to obtain whole space features. After designing a whole space plane layered medium model, equations were established based on boundary conditions in terms of electromagnetic vector potential. Expressions of electromagnetic fields were obtained by solving these equations. The expressions were computed by the Hankel transform after dispersion. The results in a frequency domain were changed into a time domain by using a multinomial cosine transform method. The expressions were correctly validated by comparing them with the analytical solution in half space. The half space and whole space results show that the whole space features are dear, suggesting that the theory of half space is not suitable for the whole space. Our algorithm supplied the technical instrument for studying the distributed features of whole space transient electromagnetic fields.