基于MEI方法的贴体网格FDTD方法  

OBJECT-FITTED FDTD METHOD BASED ON MEI-ABC 

作　　者：廖成[1] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,四川成都610031

出　　处：《红外与毫米波学报》2001年第6期442-446,共5页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金 (编号 6 99710 2 1);国家"86 3"计划基金 (编号99-0 4)资助项目~~

摘　　要：利用 Thompson变换在任意形状的散射体外部产生共形的外部计算网格 ,并使 FDTD计算区域的截断边界与散射体边界形状完全一致 ,时域不变性测试方程 (MEI)方法被作为该截断边界上的局域吸收边界条件 ,从而大大压缩了 FDTD的计算空间 .数值试验结果证实 。The finite-difference time-domain (FDTD) computational zone was truncated by an artificial boundary, of which the geometric shape was conformal with the boundary of an arbitrary-shaped scatterer. The external conformal mesh was generated by the Thompson transformation. On the truncating boundary, the time domain measured equations of invariance (MEI) were applied as a local absorbing boundary condition. So the FDTD computational domain was compressed remarkably. The numerical experiment proved that the requirement of computer storage is reduced while the numerical accuracy is not decreased.

关 键 词：电磁散射 时域有限差分法 Thompson-FDTD方法 MEI方法 截断边界 散射体 计算网格 计算机 

分 类 号：TN011[电子电信—物理电子学] O241.3[理学—计算数学]