降低结构优化设计中有限元分析时间的一种方法

A Method To Reduce FEA Time In Stracture Optimum Design

在结构优化设计问题中,每次选代寻优过程要进行一次有限元分析,该分析的大多数时间是用于对系数为一刚度矩阵的线形方程组求解。对于一类特定的问题,迭代中刚度矩阵只是部分元素在变动,利用这特性,可以极大降低优化计算的机时,本文介绍并以例子验证了该方法。

Each iteration in structure optimization is spent in solving a linear equation group with its coefficientofa stiff matrix. For some special problems,the character that only part of the elements of the stiff matrix vary in iteration, can greatly accelerate the optimization calculation. In this paper, one case will be presented to introduce and testify the method.