抛物方程方法的亚网格模型及其应用研究  

Study on Subgridding Model of the Parabolic Equation and Its Application

作　　者：张青洪[1] 廖成[1] 盛楠 赵朋程[1] 周海京[2] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031 [2]北京应用物理与计算数学研究所,北京100094

出　　处：《电子与信息学报》2014年第8期2005-2009,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金委和中物院联合基金(U1330109);高等学校博士学科点专项科研基金(20120184110013);2014年西南交通大学博士研究生创新基金;中央高校基本科研业务费专项资金资助课题

摘　　要：该文在抛物方程非均匀网格技术的基础上,提出了抛物方程方法的亚网格模型,并给出了该亚网格模型的具体构建方法,以快速准确地求解大尺度复杂电磁环境中存在关键目标的电波传播问题。通过对存在强散射体的复杂电磁环境中电磁波的分布特性进行模拟,探讨了抛物方程亚网格技术的高效性。结果表明:与细网格相比,亚网格技术使得抛物方程的计算速度提升了4.57倍,网格空间数下降了86.64%,且较非均匀网格具有更高的计算精度。可见,抛物方程的亚网格模型能够极大地提升抛物方程的仿真效率。In order to rapidly and accurately solve the radio wave propagation problems in a large scale complex electromagnetic environment with key targets, a subgridding model of the Parabolic Equation（PE） method based on the non-uniform mesh technology is presented with the detailed description on how to construct specificaly this model. The high efficiency of subgridding technique is verified by computing a complex electromagnetic environment case with a strong scattering object. The results show that the subgridding technique for the parabolic equation can improve the computational speed by 4.57 times and decrease the grid number by 86.64% as compared with the fine grid. It has a higher precision in comparition with the non-uniform mesh, demonstrating that the subgridding model can significantly enhance the simulation efficiency in solving the parabolic equation.

关 键 词：电波传播 抛物方程 亚网格技术 关键目标 

分 类 号：TN011[电子电信—物理电子学]