模态综合法在航天器结构动力学分析中的应用研究

Research on Application of Component Mode Synthesis in the Structural Dynamical Analysis of Spacecraft

简要介绍了模态综合法的基本原理和在国内外航天领域的应用发展,初步研究了模态综合法在航天领域结构动力学分析应用中受限的两个问题,即采用不同商业有限元软件建立的部组件模型如何统一缩聚为Nastran版本一级缩聚模型的接口匹配问题,以及包含部组件一级缩聚模型的航天器缩聚/物理混合模型能否二次缩聚并用于耦合载荷分析的二级缩聚问题。

The basic theory of component mode synthesis is briefly reviewed,as well as the application and development of component mode synthesis in aerospace industry.Two main problems have been preliminary solved in order to expand the application of component mode synthesis in the structural dynamical analysis of spacecraft,i.e.how to get a reduced finite element model with Nastran format when the original model is made by non-Nastran commercial software,and whether a second-time dynamical condensed model of a spacecraft could be achieved for coupled load analysis when the initial model is composed of both unreduced finite element sub-structures and reduced ones.