结构动力优化设计的改进SLP方法

IMPROVED SLP ALGORITHMS FOR OPTIMAL DESIGN OF STRUCTURES UNDER DYNAMIC LOADS

本文提出了两个改进 SLP 算法来求解满足瞬时性态约束的结构优化设计问题。对 K、C 和 M 正比于设计变量向量的结构,通过射线步使设计点沿着最严约束边界运动。对于一般的结构,则引入设计方向评价准则,充分利用前步迭代敏度信息,从不同方向向明显改进解搜索。本文给出两个算例说明改进算法的有效性。

Two improved SLP algorithms for optimal design of structures subjected to tran- sient performance constraints are presented.For the design of structures which K,C and M are proportional to design variables,the scaling step is used to move the design point along the most critical boundary of constraiats.A criterion is introduced for a available design so as to reuse the obtained sensitivity and search a better design point.Nume- rical examples are solved to illustrate the applicability of present methods.