| 理想频散关系在地质雷达剖面正演合成中的应用 |
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| 引用本文： | 何兵寿,李艳芳,张会星.理想频散关系在地质雷达剖面正演合成中的应用[J].物探化探计算技术,2000,22(2):113-116. |
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| 作者姓名： | 何兵寿 李艳芳 张会星 |
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| 作者单位： | 1. 石油大学,地球科学系,北京,102200
2. 中国矿业大学,北京,100083 |
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| 摘 要： | 通过分析时域有限差分（ＦＤＴＤ）法的特点和高频电磁脉冲在Ｙｅｅ网格中的传播规律，导出了适于地质雷达正演的理想频散关系。该频散关系即考虑了ＦＤＴＤ法的收敛性和稳定性，也考虑了高频电磁波在Ｙｅｅ氏网格中的传播特点。数值试验表明，这一关系能有效压制频散现象，真实反映地质雷达波在地下介质中的传播规律。将之用于实际计算，取得满意效果。
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| 关 键 词： | 地质雷达 FDTD法 理想频散关系 剖面正演合成 |
| 修稿时间： | 1999-12-02 |
THE APPLICATION OF IDEAL NUMERICAL DISPERSIVE RELATION IN FORWARD MODELING OF GROUND PENETRATING RADAR |
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| HE Bing-shou,LI Yan-fang,ZHANG Hui-xing.THE APPLICATION OF IDEAL NUMERICAL DISPERSIVE RELATION IN FORWARD MODELING OF GROUND PENETRATING RADAR[J].Computing Techniques For Geophysical and Geochemical Exploration,2000,22(2):113-116. |
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| Authors: | HE Bing-shou LI Yan-fang ZHANG Hui-xing |
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| Abstract: | By analyzing the characteristic of FDTD method and the penetrating rule of high frequency electromagnetic pulse, a ideal numerical dispersive relation has been proposed in the paper. Except stability and astringency of FDTD, propagation characteristic of EM wave in Yee's grid is also taken account in ideal numerical dispersive relation. The numerical test indicates that the dispersive relation can suppress numerical dispersion successfully and simulate the radiation process of GPR pulse reliably. Using the theory in forward modeling, a satisfactory result has been obtained. |
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| Keywords: | ground penetrating radar forward modeling FDTD ideal numevical dispersive relation |
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