基于有限元的探地雷达低干扰条件数值模拟

本文针对探地雷达路面结构病害仿真研究的误差进行影响因素分析,采用有限元法研究了边界条件及病害-波长尺寸比对探地雷达频域仿真准确性的影响。结果表明,使用完美匹配层能有效减少仿真过程中的杂波影响,使得模拟结果更加符合实际情况；通过仿真模拟可知波长与病害尺寸相近或相比更小时,检测效果更为显著。可见,探地雷达仿真过程中处理好边界条件和波长与病害尺寸比能大大提高仿真的准确性。

Study on Finite Element Frequency Domain of Ground Penetrating Radar for Reducing Interference

In order to reduce the error in simulation of Ground Penetrating Radar (GPR) using Finite Element Method, boundary conditions and size ratio of disease and wavelength were used to investigate their influence in simulation accuracy. The results show that perfectly matched layer (PML) can remove noise wave effectively; Simulation results show that a similar size of disease and wavelength can make the detection more precisely. It is concluded that PML and a suitable ratio of disease and wavelength can improve the simulation accuracy.