针对电特大目标散射的并行多层快速多极子计算中出现的构造几何信息树所需资源过多、保存远场模式所需内存过大及计算雷达散射截面时间长等问题,根据主流并行计算机架构以及电特大目标的特点,提出了解决方案,实现了电特大目标散射的高效精确计算。通过对未知数超过5亿、电尺寸达到几千个波长的电特大目标的数值实验,表明本文方案的精确性和高效性。
Difficulties associated with extremely large targets,including construction of the geometry tree in the algorithm,reduction of the number of far-field patterns and fast computation of radar cross section,are pointed out.Based on the architecture of popular parallel platforms,distributed memory parallel systems,and properties of targets with extremely large sizes,relative solutions are proposed.The efficiency of the proposed parallel multilevel fast multipole algorithm(MLFMA) scheme is validated by successful computations of scattering from targets with over five hundred million unknowns and several thousand wavelengths in size.