CPML在空中核爆电磁脉冲三维数值模拟中的应用  

The Application of CPML in Three-dimensional Numerical Simulation of Low-altitude Electromagnetic Pulse

作　　者：高春霞[1] 陈雨生[2] 王良厚[1] 

机构地区：[1]防化研究院第二研究所,北京102205 [2]西北核技术研究所,陕西西安710024

出　　处：《计算物理》2005年第4期292-298,共7页Chinese Journal of Computational Physics

基　　金：国防科技预研项目基金资助项目

摘　　要：在分析不同类型完全匹配层(PML,perfectlymatchedlayer)特点的基础上,选用了卷积形式PML(CPML,convolutionalperfectlymatchedlayer)截断空中核爆电磁脉冲(NEMP,nuclearelectromagneticpulse)数值模拟的开放边界.从自由空间中电磁波的平面波解和分裂形式的PML出发,构造了未分裂形式的PML,应用付里叶变换的卷积定理,推导出三维旋转椭球-双曲正交坐标系下CPML介质中电磁场的迭代形式的离散方程.获得了很好的截断效果,展示了CPML在NEMP数值模拟中的应用前景.According to the characteristics of perfectly matched layers（PML）, a convolutional PML （CPML） is chosen to truncate open boundaries used in the numerical simulation of low-altitude electromagnetic pulse. On the basis of the split-field PML and the plane-wave solution of electromagnetic field in a free space, an unsplit-field PML is constructed. With convolutional theorem in the Fourier transformation, discerete iterative equations of electromagnetic field components in the CPML media are presented in three-dimensional prolate-spheroidal coordinate system. The effectiveness of the method in numerical simulation of nuclear electromagnetic pulse is shown.

关 键 词：卷积完全匹配层 时域有限差分 电磁脉冲 核爆炸 截断 

分 类 号：O241[理学—计算数学]