大定圆回线频率域电磁场特征研究  

A STUDY ON THE ELECTROMAGNETIC FIELD CHARACTERISTICS OF LARGE CIRCULAR LOOP SOURCE IN FREQUENCY DOMAIN

作　　者：郭胜男[1] 吴延强[1] 陈欣[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541006

出　　处：《云南地质》2017年第4期555-560,共6页Yunnan Geology

摘　　要：大定圆回线非中心回线装置的电磁场计算公式中含有双重贝塞尔函数,因其高震荡性,使用常规方法计算误差较大。为提高计算精度,本文使用一种通过改进核函数的快速汉克尔变换算法来进行求解,计算结果表明:该算法能够很好的压制贝塞尔函数的强震荡性对计算结果的干扰,即使在非准静态近似的条件下,也能精确地计算出大圆回线源位于地表及接收点位于地面任意一点的电磁场,此外,大定源回线电磁场的分布规律不仅与接收装置位于回线内、外有关,还与圆回线所处的位置成一定的线性关系。A large c ircular loop electromagnetic f ie ld calculat ion o f non central loop containing double Bessel function formula, the calculat ion er or is very large in using the conventional calculat ion methiod becshock. In order to improve the calcula t ion a c cu rac y, we use the fast Hankel transform method by of t!ie kernel function for the solution in this p a p e r, which shows this calculat ion could suppress the strong shock interference of Bessel funct ion, work out the accurate electromagnetic f ie ld o f the large loop source on the surface and receiver at any point on the ground even in the non quasi static approximat ion. Moreover, the large f ixed loop electromagnetic f ie ld is not only related to receiver inside or outside loop but also has a certain l in e -ar relationship wi t ! i the position o f c irc u la r lo op.

关 键 词：大圆回线源 汉克尔变换 垂向磁场响应 

分 类 号：P631.21[天文地球—地质矿产勘探]