GPR电磁波在层状路面中传播的正演模拟  

Forward simulation for propagation of GPR electromagnetic wave in layered pavement

作　　者：谢辉[1] 丛林[1] 蔡迎春 钟燕辉 

机构地区：[1]同济大学交通学院,上海200092 [2]河南省道路检测工程研究中心,河南郑州450002

出　　处：《重庆交通学院学报》2006年第4期70-72,82,共4页Journal of Chongqing Jiaotong University

摘　　要：系统阐述了电磁场有限单元法的基本原理,然后采用四节点等参单元分别对三层路面系统进行了静态场和时变场的有限元分析,初步建立了路用探地雷达GPR电磁波在三层路面中传播的正演模型,同实测波形相比,模拟效果较好,并用Fortran90语言编制了相应的三维、二维有限元程序,具有较好的可读性和可移植性.In this dissertation, the principle of FEM in EM was discussed, then a three-layered pavement were analyzed with 4-noded isoparametric elements. Then, corresponding FEM programs are compiled in Fortran90. So a forward model was built up to describe the transmitting of electromagnetic in the radar and pavements, according to the system identification method. Compared with the methods of finite difference or FFT, the results are more precise and effective, which are more easily applied in projects.

关 键 词：路用探地雷达 电磁场有限元 等参单元 正演模型 

分 类 号：U416.217[交通运输工程—道路与铁道工程]