针对高耸结构环形TLD的多目标优化设计开展研究。首先,建立了高耸结构环形TLD控制的动力学模型,并编制了其求解程序。随后,提出了采用Sigmoid函数作为独立满意度函数,并通过线性加权建立了复合满意度函数。进而,基于遗传算法(Genetic Algorithm,GA),选取环形TLD的几何参数作为设计变量,结构响应和阻尼器行程的复合满意度作为优化目标,建立了高耸结构环形TLD控制的满意优化设计方法。最后,针对某自立式钢烟囱,编制程序开展了其在风荷载作用下环形TLD减振的优化设计。研究表明,该方法能够快速有效地得到一组满足工程需要且较为经济的设计参数,同时该方法对权重系数的敏感度较低,降低了多目标优化设计时权重系数选择的难度。
A method is proposed for the multi-objective optimization of a ring shape tuned liquid damper (TLD) arranged on high-rise structures. Firstly, the dynamic model for high-rise structures with ring shape TLD is established, and its computation program is then coded. Secondly, the independent desirability functions are constructed by using Sigmoid function, and the composite desirability function is composed of them by using linearly weighing. Then on the basis of Genetic Algorithm (GA), a satisfaction optimal design is performed, in which the geographic parameters of ring shape TLD are defined as the design variables, and the composite desirability considering both the structural response and damper outputs as the optimization objectives. In the end, the method is coded, and the optimum design of the ring shape TLD arranged on a self-standing steel chimney under wind loading is presented. The study indicates that the method is an optimal algorithm that can efficiently obtain a set of design parameters which satisfy both project requirements and economical need. And the method is less sensitive to the value of weight coefficients than the normal optimal methods, so the difficulty of choosing weight coefficients is reduced in multi-objective optimization.