基于非均匀有理B样条理论(NURBS)的电磁散射计算

非均匀有理B样条理论(NURBS)被广泛用于描述各类几何结构,它可以利用较少的信息来表示复杂的几何结构,大多数的计算机辅助几何设计都使用NURBS曲面进行建模.其中在利用NURBS区建模时.采用了渐近物理光学法(PO)简化电磁散射场,精确和快速的分析电磁散射特性,优化了计算效率和精度.利用PO法计算NURBS曲面在很大程度上消除了用平面元近似所造成的误差,同时还大大减小了曲面个数,也有利于计算量的减缩.

Computation for Electromagnetic Scattering Based on Non-Uniform Rational B-Spline Theory(NURBS)

The non - uniform rational B -spIine theory（NURBS） is widely used to describe various types of geometric struc- ture, it canuse less-informetion to represent the complex geometry, the majority of computer - aided geometric design is modeled using NURBS surfaces. NURBS surfaces using PO method largely eliminates the use of graphic element approximations of the error caused, but also greatly reduces the number of surfaces, but also condueive to reduced amount of eomputation.