基于可靠度最优分布的桁架优化设计

结构的可靠度决定于它的各个部件的可靠度.由于各个部件的造价不同,为了使结构总造价最低,各个部件的可靠度就应有所不同.这就是结构可靠度最优分布的概念.为了使结构在近期投资和长远效益最佳的目标下具有最优的工作状态,本文提出了基于可靠度最优分布的结构优化设计的概念和方法.作为一个初步探索,为简便计,本文只讨论桁架型结构.

Design of Trusses Based on Optimal Reliability Distribution

The reliability of a structure depends on the reliabilities of its members. Because the costs of various members are different, in order to make the structure's total cost minimum, the reliabilities of various members should be different and reasonably decided. This is the concept of optimal distribution of structure's reliability. The purpose of the design method proposed in this paper is to find the structural design scheme which should gain both present and long term social and economical benefits. As an initial in vestigation, this paper only considers the structures of truss type.