电波科学学报2025，Vol.40Issue(2)：294-300,7.DOI:10.12265/j.cjors.2024110
时变电磁场计算的隐式DTS-FVTD方法
Implicit DTS-FVTD method for solving time dependent electromagnetic fields
摘要
Abstract
Dual time-stepping(DTS)with implicit lower-upper symmetric Gauss-Seidel(LU-SGS)algorithm are implemented into a finite-volume time-domain(FVTD)based solver to improve the computational efficiency and accuracy.The DTS is a 2nd order time stepping method and unconditionally stable,in which the selection of physical time step is only determined by the accuracy requirements.The stability in the time marching process only depends on the pseudo time step,which significantly relaxes the restriction of time step in the explicit schemes.Large Courant Friedrichs Lewyor(CFL)numbers can be used in the forward and backward sweeps,in which small storage is used and inversion of matrices are unnecessary.The typical results of 2D,3D and complex configurations show that the computational accuracy and efficiency can be ensured by rational combinations of the physical time step,maximum sub-iterations and convergence criterion.关键词
双时间步(DTS)方法/隐式上下对称高斯-赛德尔迭代(LU-SGS)/时域有限体积(FVTD)法/雷达散射截面(RCS)Key words
dual time-stepping(DTS)method/implicit lower-upper symmetric Gauss-Seidel(LU-SGS)algorithm/finite-volume time-domain(FVTD)/radar cross section(RCS)分类
物理学引用本文复制引用
许勇,丁明松,江涛,李鹏,傅杨奥骁..时变电磁场计算的隐式DTS-FVTD方法[J].电波科学学报,2025,40(2):294-300,7.基金项目
国家重点研发计划(2019YFA0405203) （2019YFA0405203）
