摘要
实际目标的高频电磁散射模拟属于电大尺寸目标电磁计算问题,其高精度数值计算通常伴随着大存储量和大计算量的沉重负担。为保证高精度数值计算,构建了直接求解电磁学麦克斯韦方程组,采用贴体多块结构网格的时域有限体积法(FVTD)解算器。为解决大规模网格带来的大计算量问题,则采用MPI并行编程,进行网格多进程分割、负载平衡以及进程通信设置和程序并行化处理,成功地对电大尺寸飞翼外形进行了L波段双站电磁散射场和雷达截面(RCS)计算。结果表明pmbRCS3d这一并行高精度电磁散射模拟软件具有稳定和鲁棒特性,适合进一步应用于目标更高频段电磁散射计算。
Numerical simulation of real military objects′electromagnetic scattering at high frequency bands is ordinary corresponding to the electromagnetic field calculation for electrically large objects.This simulation can be computationally expensive with large storage and calculation works when high precision numerical algorithm is used.To ensure high computational precision,we programed a finite volume time domain(FVTD)solver pmbRCS3 dbased on body-fitted multi-blocks grids,which computes the Maxwell equations of electromagnetism directly.In order to handle the massive calculation work due to huge number of grids,aparallel MPI programing technique was used together with careful design of the grid partition,load balance,data communication,and parallelization.The pmbRCS3 d software was applied successfully to calculate the electromagnetic scattering field and the bi-station RCS of an L-band electrically large flying-wing shape.The results show that the developed pmbRCS3 dsoftware has stable and robust characteristic and can be used for the RCS calculation of higher frequency band objects.
出处
《空气动力学学报》
CSCD
北大核心
2017年第6期797-800,共4页
Acta Aerodynamica Sinica
基金
装备预先研究项目(51313010303)
