A new formula based on the independent electric and magnetic fields for 2.5-D forward of TEM
Coupled governing differential equations for electric and magnetic fields are commonly used in 2.5-D electromagneticmodeling. The serious disadvantage of the coupled equations is to compute the electric and magnetic fields alternately,which increases the computational costs greatly. In this paper, a group of formulas for 2.5-dimensional forward of TEM by a magnetic source based on the independent electric and magnetic fields has been developed. The fields are Laplace transformed into Laplace (S) domain and then expanded them in component format. Applying the Fourier transform to the components in the invariant conductivity direction (or strike direction), we obtain 2.5-D TEM boundary value problem in (S, Q) domain, in which the total and the secondary field are both included. The Galerkin method is used to derive the finite-element equations. However, the variational approach gives exactly the same equations. The present scheme can reduce the size of the global system matrix to the utmost extent.
Transient electromagnetic Independent EM field 2.5-D forward
XIONG Bin
Key Laboratory of Geological Engineering Centre of Guangxi Province, China;School of Info-Physics and Geomatics Engineering, Central South University, Changsha, China
国际会议
The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)
北京
英文
536-539
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）