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一个复杂结构的细致有限元分析,网格必须分划得充分稠密,这样便产生自由度很多且彼此联立的方程组,以致在电子计算机上也难以或不宜于一次求解。于是,在结构的有限元离散化模型(以后简称系统)的基础上,把系统看成子结构(部件)的组合体,逐个分析规模小得多的子结构,然后把得自子结构的主要模态资料,借助子结构交界面上的位移协调(或再辅以对接
In a detailed finite element analysis of a complex structure, the grids must be sufficiently densely demarcated to produce systems of equations of degree of freedom and sym- metrical to one another, making it difficult or unsuitable for a single solution on a computer. Thus, based on the structural finite element discretization model (hereinafter referred to as the system), the system is considered as a sub-structure (sub-assembly), one by one analysis of substructures of much smaller size, and then the main sub-structure State data, with the help of the displacement coordination on the interface of the substructure (or complementary auxiliary docking