| 探地雷达有限元数值模拟及衰减特性探讨 |
| |
| 引用本文： | 陈承申,冯德山.探地雷达有限元数值模拟及衰减特性探讨[J].物探化探计算技术,2014(2):152-157. |
| |
| 作者姓名： | 陈承申 冯德山 |
| |
| 作者单位： | [1]铁道第三勘察设计院集团有限公司,天津300251 [2]中南大学地球科学与信息物理学院,长沙410083 |
| |
| 基金项目： | 国家自然科学基金项目（40804027,41074085） |
| |
| 摘 要： | 从Maxwell方程组出发,推导了带衰减项与不带衰减项的探地雷达(GPR)有限元波动方程。利用matlab平台编译了二维GPR有限元正演模拟程序。通过对典型模型例子的模拟分析,给出了GPR电磁波衰减比的概念及其计算公式,加深理解了GPR电磁波在不同介质中的传播特性。在GPR正演模拟中,必须考虑衰减项的吸收作用,得到的模拟结果更符合GPR电磁波在地下介质中的传播规律,更有助于理解和掌握地下介质中探地雷达波的传播规律,对探地雷达资料的地质解释具有更好地指导意义。
|
| 关 键 词： | 探地雷达 衰减特性 有限单元法 正演模拟 |
Finite element method GPR forward simulation and attenuation characteristics |
| |
| CHEN Cheng-shen,FENG De-shan.Finite element method GPR forward simulation and attenuation characteristics[J].Computing Techniques For Geophysical and Geochemical Exploration,2014(2):152-157. |
| |
| Authors: | CHEN Cheng-shen FENG De-shan |
| |
| Institution: | 1. The Third Railway Survey and Design Institute Group Corporation,Tianjin 300251, China; 2. School of Geosciences and Info Physics,Central South University,Changsha 410083,China) |
| |
| Abstract: | The wave equation method of finite element method including the attenuation term or not was derived from the Max well equations. The authors have used the Matlab language to compile the 2D finite element method ground penetrating radar （GPR） forward simulation program. To show different results of the typical models, the authors have given the concept of the GPR attenuation ratio and how to formula it. The attenuation term should have taken into account when forward simulation GPR model. Therefore, the result of forward simulation accord with the actual situation of the GPR waves is seminated in the underground medium. We can understand the propagation law of the GPR waves and guide us to geologic interpretation of ground penetrating radar data. |
| |
| Keywords: | ground penetrating radar attenuation characteristic finite element method forward simulation |
| 本文献已被 CNKI 维普 等数据库收录！ |
