| 用线性数字滤波法计算大回线源在地下形成的瞬变电磁场 |
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| 引用本文： | 刘继东,方文藻.用线性数字滤波法计算大回线源在地下形成的瞬变电磁场[J].物探化探计算技术,1996,18(3):231-237. |
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| 作者姓名： | 刘继东 方文藻 |
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| 作者单位： | 甘肃煤田地质局(刘继东)，西安地质学院(方文藻) |
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| 基金项目： | 国家自然科学基金与地质行业科学技术发展基金联合资助 |
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| 摘 要： | 本文讨论了地面大回线源在地下形成瞬变电磁场的正演计算方法。其正演计算是将频率域中相同模型、相同装置条件下的谐变场结果转换到时间域来。计算方法上采用了安德森等人提出的线性数字滤波法。计算过程中采用了三次样条函数插值法，提高了计算速度。通过均匀半无限空间解析解与数值解的计算结果比较表明，两者吻合很好，说明计算方法是可信的。
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| 关 键 词： | 瞬变电磁场 线性数字滤波法 正演 |
THE CALCULATION OF THE TEM FIELD UNDERGROUND GENERATED BY A LARGE LOOP ON THE GROUND BY MEANS OF THE LINEAR DIGITAL FILTER METHOD |
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| Liu Jidong.THE CALCULATION OF THE TEM FIELD UNDERGROUND GENERATED BY A LARGE LOOP ON THE GROUND BY MEANS OF THE LINEAR DIGITAL FILTER METHOD[J].Computing Techniques For Geophysical and Geochemical Exploration,1996,18(3):231-237. |
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| Authors: | Liu Jidong |
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| Abstract: | The forward calculation method for the underground transient electromagnetic (TEM) field generated by a large loop on the ground is presented in this paper. For the foward problem. the TEM field is obtained by transforing the frequency-domain electromagetic field into the time-domain result for the same geologic model and the same array and calculated by the linear digital filtering method presented by Anderson et al.. and the computing speed is improved by the utilization of cubic spline interpolation method. |
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| Keywords: | transient electromganetic field linear digital filter method forward |
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