本文结合雷达机械结构复杂的特点,用一种改进的自由子结构模态综合法,对某雷达的机械结构进行了动力分析,得出了一些结论。最后,用ARMA时序模型及FFT谱分析对此雷达进行了实验分析。实验分析结果与理论计算吻合较好,为复杂天线系统的结构动力性能设计提供了理论和设计依据。 In this paper, combined with the complex mechanical characteristics of radar, a modified free-form modal synthesis method is used to analyze the mechanical structure of a radar. Some conclusions are drawn. Finally, the ARMA timing model and FFT spectrum analysis of the radar experiments. The experimental results are in good agreement with the theoretical ones, which provide the theoretical and design basis for the design of the dynamic performance of the complex antenna system.