高耸结构环形TLD控制的多目标遗传优化设计

Optimum design of ring-shape TLD control for high-rise structure using multi-objective genetic algorithm

针对高耸结构风振控制的优化设计开展研究。首先,根据高耸结构和环形调谐液体阻尼器(Tuned Liquid Damper,TLD)的特点,建立高耸结构环形TLD控制的动力学模型。随后,基于多目标遗传算法NSGA-II(Nondominated Sorting Genetic Algorithm Ⅱ),直接以环形TLD的几何参数为设计变量,以结构响应和阻尼器行程为目标,建立高耸结构风振控制多目标优化设计方法。最后,针对某高耸结构的风振控制问题,编制程序对其进行环形TLD优化设计的研究。研究表明,该方法是一种高效的高耸结构环形TLD优化设计算法,设置种群数和进化代数为30以上,即能够在满足约束条件的前提下快速、有效地得到Pareto最优解集,方便工程师从中选择符合实际需要的最优解并完成设计。

The optimal design is conducted for the control of high-rise structure. Firstly,the dynamic model of high-rise structures with ring-shape Tuned Liquid Damper( TLD) is established according to the characteristics of high-rise structures and ring-shape TLD. Secondly,based on the multi-objective genetic algorithm NSGA-II( Non-dominated Sorting Genetic Algorithm Ⅱ),a multi-objective optimal design,in which the geographic parameters of ring-shape TLD are defined as the design variables and the structural responses and the outputs of the ring-shape TLD are the optimization objectives,is proposed for the wind-induced vibration control of high-rise structures. In the end,the method is coded,and the optimum design for the ring-shape TLD arranged on a high-rise structure under wind load is presented. The results indicate that for the optimum design of the ring-shape TLD used in high-rise structures,the proposed algorithm is a high-efficiency optimal method,and when both the population and generation are set more than 30,the optimal Pareto solutions can be effectively attained with the constraint conditions satisfied,so that the engineers can conveniently make a decision on the optimal design which satisfies the actual requirements most.