基于Bingham型阻尼的基础激励结构非线性TMD优化设计

IF 3 Q2 ENGINEERING, CIVIL
Sarranya Banerjee, Aparna (Dey) Ghosh
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引用次数: 6

摘要

本文提出了一种具有宾汉型阻尼的非线性TMD的优化设计程序,该程序可以使阻尼器的设计更加经济和现实。优化问题是在遗传算法(GA)框架下解决的。考虑到小的非线性,通过标准等效线性化方法验证了遗传算法的非线性TMD设计。通过对四种不同的单自由度结构TMD系统在记录地震地面运动下的数值模拟研究,展示了TMD设计的有效性。结果表明,与线性TMD相比,具有宾汉型阻尼的优化设计的非线性TMD可以有效地减小TMD阻尼元件的尺寸,但代价是控制性能略有下降。还显示了具有宾厄姆型阻尼的非线性TMD相对于产生设计后非线性的线性TMD的改进性能。此外,还提出了一种使用遗传算法的非线性TMD鲁棒设计程序,该程序可以满足主结构固有频率的扰动。因此,与统计线性化方法相比,使用遗传算法的非线性TMD优化设计程序具有几个优点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimal design of nonlinear TMD with Bingham-type damping for base-excited structures
ABSTRACT This paper presents an optimal design procedure for a nonlinear TMD with Bingham-type damping that can lead to a more economic and realistic design of the damper. The optimization problem is solved in the Genetic Algorithm (GA) framework. Considering small nonlinearities, the nonlinear TMD design using GA is validated through standard equivalent linearization method. The efficacy of the TMD designs is presented through a numerical simulation study on four different single-degree-of-freedom structure-TMD systems subjected to recorded earthquake ground motions. Results indicate that the optimally designed nonlinear TMD with Bingham-type damping can effectively reduce the size of the TMD damping element at the cost of a very slight degradation in control performance as compared to the linear TMD. The improved performance of the nonlinear TMD with Bingham-type damping over the linear TMD that develops post-design nonlinearities is also shown. Further, a robust design procedure of the nonlinear TMD using GA is presented that can cater to perturbations in the natural frequency of the primary structure. Thus, the optimal design procedure using GA for the nonlinear TMD offers several advantages as compared to the statistical linearization approach.
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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