摘要
针对时域有限差分(FDTD)方法在计算电磁散射等所遇到的精确有效建模问题,采用AutoCAD建立目标的三维模型,调用VBA程序进行适应FDTD计算的目标网格离散处理,生成相应的几何-电磁参数描述文件,并建立该文件与FDTD求解程序结合的计算程序接口,实现了有效、快速和精确建模手段,可以实现从目标建模到电磁特性分析一体化。作为应用,对金属球、金属抛物面旋转体和金属球部分体3个结构进行了建模、运算的实例仿真计算,计算结果表明了该建模方法的正确性和有效性,对通常用FDTD方法进行建模有重要意义。
Aiming at the precision and validity of modeling problem in the calculation of electromagnetic scattering using finite difference time domain （FDTD） method,a 3D model of the object is set up using AutoCAD. The VBA procedure is called to discrete the model to accommodate to FDTD method and the geometric-electromagnetic description file is generated. An interface is built between the description file and FDTD calculation program to realize the approach of modeling effectively, quickly and accurately. Accordingly the integration of the object modeling and the electromagnetic dispersion feature analysis are made. As an application, the metallic sphere, metallic parabolic revolver and metallic part of sphere are modeled and caculated. The results verify the correctness and validity of this modeling method, which is significant for the traditional FDTD modeling technolo~.
出处
《北京信息科技大学学报（自然科学版）》
2013年第2期61-65,70,共6页
Journal of Beijing Information Science and Technology University
基金
国家自然科学基金资助项目(61172024)
关键词
时域有限差分方法
AUTOCAD
建模技术
电磁散射
finite difference time domain method
AutoCAD
modeling technology
electromagnetic scattering
