基于GPR数值模拟正演的地下介质分析方法

Underground medium analysis method based on GPR numerical simulation forward modeling

为了探究探地雷达释放电磁波信号的成像规律,利用gprMax基于时域有限差分(FDTD)的方法进行模拟仿真电磁波信号的成像,构建地质模型,模拟电磁波的传播情况,研究电磁波信号的相位变化以及极化方向.经过模拟仿真,符合电磁学中的电磁规律,验证了gprMax正演模拟具有较高的准确度和可行性.

In order to explore the imaging law of electromagnetic wave signal released by ground penetrating radar,gprmax based on finite difference time domain(FDTD)method is used to simulate the imaging of electromagnetic wave signal,build geological model,simulate the propagation of electromagnetic wave,and study the phase change and polarization direction of electromagnetic wave signal through simulation,it conforms to the electromagnetic law in electromagnetism,and verifies that gprmax forward simulation has high accuracy and feasibility.