桁架结构选型优化设计的新探索

New Exploration on Type-Selection Optimal Design for the Truss Struc tures

考虑桁架结构选型的复杂性 ,提出一种基于拓扑组概念的实际方法 :先决定可能的拓扑组数目 ,经过结构静定性分析、节点检查和刚体运动检查以减少重分析次数 ,最终进行横截面积优化得到最佳结构型式。结论表明该方法实用。

Considering the complication in type-selection o ptimal design for truss structures, a practical method based on topology group c oncept is presented. Number of possible topology groups are determined firstly v ia a binary algorithm. In order to decrease re-analysis, the analysis of static al determination as well as node examination and rigid body movement examination is executed for obtaining the so-called meaningful topology groups. Finally, t he process of sectional area optimization acquires the best structural type. Num erical examples show that our method is practical, simple and reliable.