时域有限元法在计算电磁问题上的应用及发展  

Application and development of time-domain finite element method on EM analysis

作　　者：吴霞[1] 周乐柱[1] 

机构地区：[1]北京大学信息科学技术学院电子学系,北京100871

出　　处：《电波科学学报》2008年第6期1209-1216,共8页Chinese Journal of Radio Science

摘　　要：对时域有限元法应用于三维电磁辐射和散射问题的原理和最新进展作了简要介绍。首先给出了时域有限元法的原理和基本公式;然后介绍了时域有限元法遇到过的开域自由空间截断及庞大的计算域等问题及其解决方案;最后,对该领域尚待解决的问题和可能的发展趋势,例如混合方法、hp-自适应技术、正交基函数以及用图像处理单元(GPU)加速有限元算法等进行了评论和展望。The principles and new development of the time-domain finite element method （TDFEM） for 3D EM radiation and scattering problems is reviewed in this paper. Firstly, the principles and fundamental formulas of TDFEM are introduced. Then, some problems encountered in the implement of TDFEM, such as mesh truncation of the unbounded free space, solution of large-scale matrix equation in each time step and corresponding resolution schemes are discussed. Finally, comments and developing trends of TDFEM are presented, including the hybrid methods of TDFEM together with other approaches, hp-adaptive technique, orthogonal basis functions and acceleration of FEM using Graphics Processor Units （GPU） in time domain, etc.

关 键 词：时域有限元法 电磁辐射 电磁散射 超宽带 

分 类 号：O414.4[理学—理论物理]