| 三维导电导磁体电磁响应的数值解 |
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| 引用本文： | 俞黎明,许洪海.三维导电导磁体电磁响应的数值解[J].地球物理学报,1986,29(2):176-184. |
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| 作者姓名： | 俞黎明 许洪海 |
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| 作者单位： | 武汉地质学院北京研究生部 |
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| 摘 要： | 本文提出一种关于自由空间三维导电导磁体在谐变磁偶极场中电磁响应的数值计算方法。从麦克斯韦方程组导出以体内涡流密度和磁化强度为未知函数的一个联立微分积分方程组。采用迭代方法计算涡流和极化磁矩之间的相互作用,使联立的微分积分方程转化为两个独立的积分方程,再用积分方程法和有限差分法来求解。这种混合方法的优点在于它的计算速度较快。
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| 关 键 词： | 导电导磁 电磁响应 数值解 剖面曲线 迭代 频率特性曲线 磁矩 场源 实分量 磁化强度 |
| 收稿时间： | 1984-02-23 |
THE NUMERICAL SOLUTION FOR THE EM RESPONSE OF THREE-DIMENTIONAL CONDUCTING PERMEABLE BODIES |
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| YU LI-MING,XU HONG-HAI.THE NUMERICAL SOLUTION FOR THE EM RESPONSE OF THREE-DIMENTIONAL CONDUCTING PERMEABLE BODIES[J].Chinese Journal of Geophysics,1986,29(2):176-184. |
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| Authors: | YU LI-MING XU HONG-HAI |
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| Institution: | Beijing Graduate Department, Wuhan College of Geology |
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| Abstract: | This paper presents a digital method to calculate the EM response of a three-dimen-tional conducting permeable body which is subjected to an alternating magnetic dipole field in free space. The simultaneous differential-integral equations in which the eddy current density and intensity of magnetization in the body are unknown functions are derived from Maxwell's equations. By using the iterative method to calculate the mutual effect of the current and the polarized magnetic moment, the simultaneous differential-integral equations are converted to two independent integral equations and finite difference techniques are used to solve them. The advantage of this rybrid method is its fast computing speed. |
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