基于改进的多层快速多极子算法在舰船RCS计算中的应用  

The application of calculation of ship's RCS based on improved multilevel fast multipole algorithm

作　　者：方重华[1] 宋东安[1] 温定娥[1] 谭辉[1] 张崎[1] 

机构地区：[1]电磁兼容性国防科技重点实验室中国舰船研究设计中心,湖北武汉430064

出　　处：《舰船科学技术》2009年第8期108-110,114,共4页Ship Science and Technology

摘　　要：针对舰船RCS提出了对多层快速多极子算法(MLFMA)的改进措施,主要是使用目标旋转法来降低计算的内存需求和提高计算速度。通过目标的旋转,可减小多层快速多极子算法包含目标最高层盒子的尺寸,从而减小了辐射模式取样数和邻近的相互作用,使得在内存需求和计算速度上有明显改进。数值计算结果表明了该方法对舰船类大型目标的有效性和可靠性。这一改进措施对于舰船等电大尺寸目标的电磁特性计算很有实际意义。The improvement of multilevel fast multipole algorithm （MLFMA）is presented for ship＇s RCS. It mainly reduce memory and increase computation speed by the method of target rotation. By means of the method, the memory reduction can be realized by constructing the bounding box around the target such that the overall dimension of the box enclosing the target is minimized. As a results, the radiation patterns and near field neighbour interaction are reduced. The numerical results have shown the effectiveness of improvement for ships. It is very valuable to the calculation of electromagnetic characteristic of electrically large target （ship） in practice.

关 键 词：MLFMA 舰船 目标旋转法 

分 类 号：TM937[电气工程—电力电子与电力传动] U674.7[交通运输工程—船舶及航道工程]