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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。
In this paper, the fuzzy decision-making method of single-layer reticulated shell structure is proposed, in which the objective function of decision-making model not only considers the bar fee and node cost of single-layer reticulated shell, but also considers the cost of structure maintenance and natural disaster In addition, the fuzzy information existing in the factors such as strength, stiffness and stability are taken into account in the constraint conditions, thus forming the fuzzy decision-making problem of single-layer reticulated shell structure. In the process of solving the fuzzy decision-making problem, it is solved in two stages. In the first stage, the structural cost is taken as the objective function to solve the fuzzy minimum design. In the second stage, based on the fuzzy minimum design obtained in the first stage, the structural maintenance cost and loss expectation are further considered The final fuzzy optimization of single layer reticulated shell structure.