| 一种层状大地瞬变电磁响应正演计算的改进方法 |
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| 引用本文： | 罗润林,张小路.一种层状大地瞬变电磁响应正演计算的改进方法[J].物探化探计算技术,2005,27(1):25-28. |
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| 作者姓名： | 罗润林 张小路 |
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| 作者单位： | 1. 河海大学,土木工程学院,江苏,南京,210098;桂林工学院,资源与环境工程系,广西,桂林,541004
2. 桂林工学院,资源与环境工程系,广西,桂林,541004 |
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| 基金项目： | 广西壮族自治区地质勘查专项经费资助项目(020211) |
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| 摘 要： | 频谱法是瞬变电磁法正演计算中常用的计算方法之一,其关键在于内层含贝塞尔函数的积分计算。对于重叠回线装置的瞬变电磁法正演的内层积分,以往采用在积分区间内寻找贝塞尔函数的零点分布,依次在相邻零点之间采用一般的数值积分法在求得各自的积分值后再叠加的方法进行计算。这种方法精度较高,但效率低。利用贝塞尔函数的大宗量渐近特性,提出一种新的计算方法。计算结果表明,该方法计算效率高、方法简单、精度可靠。
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| 关 键 词： | 双重贝塞尔函数积分 瞬变电磁响应 正演计算 重叠回线装置 |
| 文章编号： | 1001-1749(2005)01-0025-04 |
| 修稿时间： | 2004年2月2日 |
A new forward method of tem ersponse to layered earth |
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| LUO Run-lin,ZHANG Xiao-Lu.A new forward method of tem ersponse to layered earth[J].Computing Techniques For Geophysical and Geochemical Exploration,2005,27(1):25-28. |
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| Authors: | LUO Run-lin ZHANG Xiao-Lu |
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| Abstract: | Spectral method is one of the most popular methods for TEM directive calculation. One of the keys to this method is to solve the inner integration with Bessel function. In the past, the inner integration of directive calculation coincide-loop TEM response was to find zeros in the integrating zone and then sum up all the values computed in the area between two neighboring zeros by normal numerical integration. Although this method can get high accurate values, it has low efficiency. This paper presents a new method, which can gain both of acceptable accuracy and high efficiency. |
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| Keywords: | dual bessel integration TEM response directive calculation coincide-loop |
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