大型目标RCS的快速计算及分析

阐述了近年来发展的用于分析电磁散射问题的快速多极子算法（FMM）和多层快速多极子算法（MLFMA）．为了能够有效快速地分析大型复杂结构目标的散射特性，利用了混合积分方程（CFIE），并在上述快速算法迭代过程中采用不完全分解LU方法（ILU）的加速收敛技术，极大地提高了计算速度．同时重点研究了某特殊结构飞行目标的雷达散射截面（RCS），其结果对分析该飞行目标的散射特性有很好的指导意义．

The fast computation and analysis of RCS for large objects

The fast mutipole method (FMM) and multilevel fast-multipole algorithm(MLFMA) are investigated first for analyzing the radar cross section from large and complex structure objects fast and effectively. And the incomplete LU factorization (ILU) method is employed to reduce the iterative times while the fast algorithms are used. The fast algorithms combine with the ILU to make the simulation speed improve largely. Then the emphasis was put on simulating and studying the RCS from a aircraft of special structure. Theoretical results are very useful for investigating this type of aircraft.