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子结构矩阵结构分析方法,通过内自由度的凝聚,降低刚度矩阵的阶数,从而可用内存较小的电子计算机求解某些大型线性方程组。因此,子结构有限元分析方法是大型结构应力分析的有效方法,具有推广使用的价值。 本文除并联子结构法的基本原理(包括内自由度的凝聚和刚度矩阵的组集等方面)外,作为主要内容,还包括我们修改编写的TQ—16机用子结构有限元计算程序的结构,此程序已用简单的平面桁架作为实例上机考核,获得通过,证明程序具有预期的功能。
The substructure matrix structure analysis method reduces the order of the stiffness matrix by condensing the internal degrees of freedom, and thus can solve some large-scale linear equation groups with less memory of the computer. Therefore, the substructure finite element analysis method is an effective method for large-scale structural stress analysis and has the value of promotion and use. In addition to the basic principles of the parallel substructure method (including the aggregation of internal degrees of freedom and the grouping of stiffness matrices), this paper also includes the structure of the TQ-16 machine substructure finite element calculation program that we have modified and written. This program has used a simple plane truss as an example to evaluate the machine, and it has been passed to prove that the program has the expected function.