PC集群MPI并行矩量法研究复杂目标的电磁散射

Investigation on Electromagnetic Scattering from Complex Target with Parallel Method of Moments Based on MPI of PC Clusters

利用基于PC集群MPI并行平台的并行矩量法研究了实际军事目标—导弹与飞机的电磁散射特性。根据MPI并行平台的特点,提出了阻抗矩阵按行划分的矩阵填充方法,并给出了求解矩阵方程的并行共轭梯度法的详细过程。通过对比不同进程的计算时间,给出了该方法的并行计算效率,并证明了该方法为求解三维电大尺寸目标的电磁散射问题提供了一定的解决方案。最后,利用并行矩量法计算了雷达波迎头照射三维导体导弹与飞机目标时的雷达散射截面并与FEKO软件的计算结果进行了对比。

Based on the MPI of PC clusters, the parallel MOM is investigated for the EM scattering from the actual martial targets-missile and flight. According to the property of MPI, the CGM for solving MOM matrix equations is parallelized through dividing the impedance elements by lines. The parallel com- putational effectivity is shown by comparing the computational time of different processes. It is proved that the proposed method supplies a novel technique for solving EM-scattering problem from 3-D electrically large targets. Finally, the RCS of the missile and flight is calculated by the parallel MOM for the ease of the radar wave exposure upon the head of the targets, and the numerical results are compared with those obtained by the business software.