电磁场有限元法在GPR正演模拟中的应用

Application of finite element methods for electromagnetic fields in forward model of GPR

采用二十节点等参单元对Pulse雷达实体进行有限元计算,用fotran语言编制了相应的三维有限元程序,根据系统识别原理建立了电磁波在Pulse雷达天线中全反射传播的正演模型,同时域有限差分法、时频域的FFT变换法相比,此结果更为精确、有效,便于工程应用。

In this paper, isoparametric elements of twenty nodes are used to calculate the body of Pulse Radar, and a 3-D FEM program was compiled. According to the system identification method, a forward model was built up to describe the transmitting of electromagnetic in the radar. Compared with the methods of finite difference or FFT, the results are more precise and effective, which are more easily applied in projects.