基于UPML吸收边界的探地雷达数值模拟研究  

Modeling of Ground Penetrating Radar Based on UPML Boundary Conditions

作　　者：詹应林[1] 昌彦君[2] 曹中林[3] 

机构地区：[1]中国冶金地质总局中南地勘院,湖北武汉430074 [2]中国地质大学地球物理与空间信息学院,湖北武汉430074 [3]四川石油管理局地球物理勘探公司,四川成都610213

出　　处：《资源环境与工程》2008年第2期235-238,共4页Resources Environment & Engineering

摘　　要：运用时域有限差分法实现探地雷达数值模拟时,边界条件的吸收特性对计算结果起着关键性作用。引入一种新的吸收边界:单轴各向异性理想匹配层(UPML),实现对有损耗介质中雷达波传播的数值模拟;并在激励源子波中心频率分别为100、500和1000MHz的情况下,以二维空间中的电偶极子辐射作为算例给出了其全局误差的计算结果。应用该方法对几种常见的探地雷达模型进行正演剖面合成,取得了较好的结果。Absorbing boundary condition （ABC） plays a critical role in numerical modeling of ground penetrating radar （GPR） using finite-difference time-domain （FDTD） method. In this paper, a uniaxial anisotropic perfectly matched layer （UPML） is introduced,which is adapted to simulate ground penetrating radar in lossy medium in the case of that the central frequency of source wave are 100 MHz,500 MHz and 1 000 MHz separately, the results show the global error through the calculation of eletric dipole radiation in two：dimensional space. The method is applied to modeling GPR in several kinds of common model has better effect.

关 键 词：探地雷达 时域有限差分法 UPML吸收边界 正演模拟 

分 类 号：P225.1[天文地球—大地测量学与测量工程]