单层网壳结构的模糊决策分析

本文提出了单层网壳结构的模糊决策方法 ,其中决策模型的目标函数中不仅考虑了单层网壳结构的杆件费用和节点费用 ,而且还考虑了结构的维护费用以及遇到自然灾害时损失的期望值 ,另外在约束条件中考虑了强度、刚度、稳定等因素中存在的模糊信息 ,从而构成了单层网壳结构的模糊决策问题。在其模糊决策问题的求解过程中 ,分两个阶段进行求解。在第一阶段 ,以结构造价为目标函数 ,求解其模糊最小设计 ;而在第二阶段是在第一阶段中求出的模糊最小设计的基础上 ,进一步考虑结构的维护费用和损失期望值 ,求出单层网壳结构的最终模糊优化解。

Analysis on Fuzzy Decision Making of Single Layer Latticed Dome Structures

This paper presents the fuzzy decision making method of single layer latticed dome structures In which the objective function of the decision making model considers not only the member cost and joint (MERO) cost of the single layer latticed domes, but also the expected cost of additional expenses needed during its operation and natural disaster losses as for the constraints, the fuzziness of strength, rigidity and stability, etc of the structures are taking into consideration So they constitute the fuzzy decision making problem of single layer latticed dome structures In this paper the fuzzy decision making is executed in two phase optimization In the first phase, the cost of the structures is regarded as the objective function to find the minimum cost design of fuzzy decision making In the second phase optimization, both fuzzy minimum cost of the structures and fuzzy expected cost in the service life of the single layer latticed domes are put together to find out the final solution of fuzzy decision making of the single layer latticed dome structures