针对舰船RCS,提出了对多层快速多极子算法(MLFMA)应用于工程实践的改进措施。本文的研究思路与以往的研究者有所不同,另辟蹊径选择了迭代残差作为实践研究的突破口,探索出适合于工程实践的算法运用结论。通过对多个迭代残差值的比较,选择出使计算结果精度基本不变而迭代次数减少的迭代残差值,从而直接提高了计算收敛速度。数值计算结果表明,对于某型舰艇模型来说,0.01是比较合适的值。同时,这一方法对舰船类大型目标的电磁计算也有指导意义和工程实用价值。 Aiming at the ship RCS, an improved method of applying multilayered fast multipole algorithm (MLFMA) to engineering practice is proposed. The research ideas of this paper are different from those of previous researchers. I chose the iterative residuals as the breakthrough of practical research, and explored the application of the algorithm which is suitable for engineering practice. Through the comparison of multiple iterative residuals, the iterative residuals are selected to make the accuracy of the computation substantially unchanged and the number of iterations reduced, which directly improves the computational convergence rate. Numerical results show that, for a certain type of ship model, 0.01 is a more appropriate value. At the same time, this method is also instructive and practical value for the electromagnetic calculation of large-scale ship targets.