基于有限元的探地雷达低干扰条件数值模拟  

Finite Element Frequency Domain of Ground Penetrating Radar for Reducing Interference

作　　者：迟凤霞 章天杰 奚晨晨 CHI Feng-xia;ZHANG Tian-jie;XI Chen-chen(Zhejiang Scientific Research Institute of Transport, Hangzhou 311305, China)

机构地区：[1]浙江省交通运输科学研究院,杭州311305

出　　处：《科学技术与工程》2020年第30期12570-12575,共6页Science Technology and Engineering

基　　金：浙江省交通运输厅科技项目(2019054);浙江省自然科学基金(LQY18E080001)。

摘　　要：为了研究探地雷达路面结构病害仿真的误差影响因素,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。To analyze the interfering factors in simulation of ground penetrating radar(GPR)that applied for road quality control and quality assurance,the influence of boundary conditions and RDW(ratio of disease and wavelength)on the accuracy of frequency domain simulation of GPR were studied in finite element method.Results show that using perfectly matched layer(PML)could remove noise wave effectively,and that the detection effect was more significant when the wavelength was close to or smaller than the disease size.Therefore,PML and a suitable RDW can improve the accuracy of such a simulation.

关 键 词：有限元 探地雷达 低干扰 完美匹配层 散射边界条件 

分 类 号：U416.06[交通运输工程—道路与铁道工程]