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为了考虑业主意向、成本、工期、构件加工及运输、施工难度等因素影响,高效地进行项目总承包模式下网壳的多目标优化,以关联分析为基础建立了优化模型。在优化模型中,主要目标是耗钢量,次要目标是位移和杆件类型数,设计变量是网壳矢高、厚度、网格数和杆件截面属性。优化采用ISIGHT和ANSYS两个软件协同进行,分析方法采用一维搜索法和NSGA-Ⅱ遗传算法。以凯威特型单层球面网壳为例,得到了满足要求的最优解。所提出的方法具有明显的自主优化特点。
In order to consider the influence of the owner’s intention, cost, duration, component processing and transportation, construction difficulty and other factors, the multi-objective optimization of the reticulated shell under the project general contracting mode is carried out efficiently. The optimization model is established based on the correlation analysis. In the optimization model, the main target is the consumption of steel, the secondary target is the displacement and the number of rod types. The design variables are the reticulated shell height, thickness, number of grids and cross-section properties of the bar. Optimization using ISIGHT and ANSYS two software collaborative, analytical methods using one-dimensional search method and NSGA-Ⅱ genetic algorithm. Taking Kaweite-type single-layer spherical reticulated shell as an example, we get the optimal solution to meet the requirements. The proposed method has obvious self-optimizing characteristics.