时间域瞬变电磁法全区视电阻率的平移算法  

Time domain transient electromagnetism all time apparent resistivity translation algorithm

作　　者：王华军[1] 

机构地区：[1]浙江大学地球科学系,杭州310027

出　　处：《地球物理学报》2008年第6期1936-1942,共7页Chinese Journal of Geophysics

基　　金：中国博士后科学基金资助项目(20070411190)资助

摘　　要：深入分析了均匀半空间中瞬变电磁场的解析表达式,发现瞬变响应曲线随地下电导率、发射回线边长与观测时间具有平移伸缩特性,并据此提出了一种新的直接计算全区视电阻率的方法.该法与现有计算全区视电阻率的方法的不同点在于:无需迭代和求解非线性方程,速度快,精度高,算法稳定,且只有惟一解.This paper analyzed thoroughly the transient electromagnetic field analytic expression in homogeneous half space, discovered that the transient response curve has a characteristic of translational expansion and contraction with the underground conductivity, transmit loop length and observation time. According to that, we proposed a new direct method to calculate full time domain apparent resistivity. Different with the existing full time domain apparent resistivity computation method, this new method does not need to iterate and solve nonlinear equation, the speed is quick, the precision is high, the algorithm is stable, and the solution is unique.

关 键 词：瞬变电磁 全区视电阻率 中心回线 平移算法 数值计算 

分 类 号：P631[天文地球—地质矿产勘探]