论文部分内容阅读
为了得到指定结构跨度下的索穹顶结构形状最优设计方案,对设内拉环的Geiger型索穹顶进行单目标和多目标形状优化设计.以最小单位面积用钢量和最大结构刚度为目标函数,得到满足约束条件的整体预应力系数、拉索和压杆截面面积及结构形状参数的最优值.通过基于遗传算法的单目标形状优化设计以最小单位面积用钢量为目标的可行形状优化设计方案;多目标形状优化设计采用改进的带精英策略的快速非支配排序遗传算法(NSGA-Ⅱ),可得到同时考虑结构用钢量和刚度的Pareto最优解.决策者可根据不同控制目标的偏好要求,选择设计方案.
In order to obtain the optimal design of the cable dome structure under the span of the designated structure, the single-target and multi-objective shape optimization design of the Geiger cable dome with the inner ring was set up. With the minimum unit volume of steel and the maximum structural rigidity as the objective function , The overall prestress coefficient, the cross-sectional area of the cable and strut and the optimal structural shape parameters are obtained.According to the single objective shape optimization design based on genetic algorithm, the feasible shape optimization with the minimum unit area of steel as the goal Design scheme; Multi-objective shape optimization design The Pareto optimal solution considering both the amount of steel and the stiffness of the structure can be obtained by using the improved rapid non-dominated ranking genetic algorithm (NSGA-Ⅱ) with elitist strategy.Due to the different control objectives Preferences, select the design.