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模态子结构法在对超大型器件的模态分析中比对一般模态分析更有优势:可以减少计算量,减小计算误差,便于采取分布式计算分析的方法,减轻计算机的计算负荷,并在保证计算结果精度的基础上提高计算效率。实验模态分析方法是结构模态分析的另一重要手段,与有限元数值解析及近似模拟分析法相结合可以很好地分析结构的动态特性,并可用来验证有限元模态分析结果的正确性。对火箭滑橇上搭载的大型超高速导弹数控飞行转台进行了模态子结构分析,将得出的结果和数据与实验模态分析的结果相比较,验证了这种方法的有效性,为模拟导弹性能的超高速数控飞行转台的动力学设计提供一种新的思路。
The modal substructure method has more advantages than the general modal analysis in the modal analysis of very large devices. It can reduce the computational complexity, reduce the computational error, facilitate the method of distributed computational analysis, reduce the computational load of the computer, And improve the calculation efficiency based on the accuracy of calculation results. Experimental modal analysis method is another important means of structural modal analysis. Combined with finite element numerical analysis and approximate simulation analysis, the dynamic characteristics of the structure can be well analyzed and used to verify the correctness of finite element modal analysis . The modal substructure analysis of the large-scale high-speed missile NC flight turntable mounted on a rocket skid is carried out. The obtained results and data are compared with the experimental modal analysis to verify the effectiveness of this method. Missile performance of high-speed CNC flight turntable dynamic design provides a new idea.