基于G-TF/SF技术的地面HEMP环境研究  

Study on HEMP Environment of Ground Based on G-TF/SF Technique

作　　者：杨超[1] 谢海燕[1] 翟鑫洋 乔海亮[1] 陈再高[1] 高银军[1] Chao YANG;Haiyan XIE;Xinyang ZHAI;Hailiang QIAO;Zaigao CHEN;Yinjun GAO(National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an,Shaanxi 710024,China)

机构地区：[1]西北核技术研究所,强脉冲辐射环境模拟与效应全国重点实验室,陕西西安710024

出　　处：《计算物理》2024年第5期589-595,共7页Chinese Journal of Computational Physics

基　　金：国家重点研发计划(2020YFA0709800)资助。

摘　　要：对于半空间问题的时域有限差分方法(FDTD)解决方案,基于传统总场散射场(TF/SF)技术的平面波加载方法无法直接用于地面电磁散射问题中,本文将广义总场散射场(G-TF/SF)方法推广至三维地面的高空电磁脉冲(HEMP)环境计算,四周采用卷积完全匹配层(CPML)吸收边界条件。G-TF/SF方法可有效消除数值计算中截取无限大地面产生的边缘效应,提高地面电磁环境的计算精度,且G-TF/SF边界只需要加载入射场,避免了反射场与透射场的计算。For the finite-difference time-domain(FDTD)solution of the half-space problem,the conventional total-field/scattered-field(TF/SF)technique cannot be directly applied to introduce excitation fields for electromagnetic scattering from the ground.In this paper,we extend the generalized total-field/scattered-field(G-TF/SF)method to accurately calculate the high altitude electromagnetic pulse(HEMP)environment in 3D ground scenarios and adopt the convolution perfectly matched layer(CPML)absorption boundary condition around it.The G-TF/SF method effectively eliminates edge effects in numerical calculations for finite ground,thereby improving accuracy in the calculation of the ground electromagnetic environment.Moreover,only the incident field needs to be introduced at the G-TF/SF boundary,avoiding the computation of reflected and transmitted fields.

关 键 词：时域有限差分 广义总场散射场 高空电磁脉冲环境 地面 

分 类 号：O441.4[理学—电磁学]