【作者】 张东涛；

【导师】 王社良；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2010， 硕士

【摘要】 空间钢结构以其新颖的结构形式、优雅的建筑造型和强大的跨越能力而得到快速发展。但是由于这种结构具有自身形式多样,造型复杂多变,杆件和节点数目繁多等特点,目前对这种结构的研究一般都集中在静力性能方面,而对其动力灾变分析和减震控制方面的研究尚不多见。同时,由于大跨空间网格结构模型复杂,难以精确建模,且大跨空间钢结构属于本身刚度较小的柔性结构,在风或地震等动力作用下容易出现疲劳破坏,结构的动力响应也比较敏感,如何采用经济、可靠的振动控制手段以减少风或地震的灾害损失就显得非常必要。为此本文以模糊控制法,即不需要建立精确的模型、具有人工智能的方法,来进行大跨空间钢结构振动控制,很好地实现了其的抗风减振目的,控制效果明显。本文系统地介绍了压电材料的基本特性和压电方程,压电驱动器的特性以及模糊控制的原理和结构,全面阐述了模糊控制系统工作的的基本原理和特点及其适用范围,并将压电驱动杆件集成于结构的关键部位进行大跨空间钢结构的振动控制。同时,进一步根据模糊控制的基本原理,提出了一种适合大跨空间钢结构模糊控制的模糊控制器设计方法和工作原理,利用SIMULINK工具箱建立了结构振动控制的分析与计算流程,并用模糊逻辑工具箱进行了网壳结构的模糊建模分析。为了验证理论分析的有效性和正确性,进行了空间钢结构模型结构的振动台试验。根据理论分析和数值模拟结果,设计并制作了两个不同的空间钢结构模型,对其节点配重和主元控制杆件的位置进行了优化,并对主元控制杆件集成于较优部位的空间钢结构模型结构进行了振动台试验,通过对实验数据进行了全面分析与计算,得出了一般压电主元控制杆件的振动控制规律。试验结果表明,理论分析与试验数据吻合较好,空间钢结构振动控制效果良好。为此,本文研究不仅具有重要的理论意义,而且也具有广阔的工程应用前景。更多还原

【Abstract】 Space steel structure with its novel structure, elegant architectural style and a strong ability to get across the rapid development. But the existence of such a structure itself takes many forms, modeling complex, numerous bars and node characteristics such as the current structure of such studies have generally focused on the static performance, but its dynamic analysis and vibration control of disaster The study has just begun. As the large-span space steel structure in place its own rigidity of the flexible structure of the table smaller, so in the dynamic action of wind or earthquake, and so prone to fatigue damage under the structure of the dynamic response more sensitive, so the use of economic and reliable means to reduce earthquake losses is necessary to. However, large-span spatial lattice structure model complex, and difficult to accurately model. Fuzzy control as an intelligent control method is to mold and control technology, fuzzy product of the combination. It does not require the establishment of special hot accurate models, with artificial intelligence features. Hence, the control space steel structure model of vibration evident result.This paper describes the basic characteristics of piezoelectric materials and piezoelectric equations, analysis of the characteristics of piezoelectric actuator.Introduced the principle and structure of fuzzy control. Fuzzy control system described the work of the basic principles and characteristics of their scope of application.The piezoelectric rods integrated into the structure of a key component of the steel structure vibration control of space. Analysis of the basic principles of fuzzy control and fuzzy controller design, using SIMULINK toolbox set up the control of structural vibration control processes, and use fuzzy logic toolbox was reticulated shell structure of fuzzy modeling analysis,Has done a space steel structure vibration table test. Designed and produced two different models of space steel structure, its node weight and the main meta-control bar position were optimized. The control rods will be the main integrated in a good position to optimize the vibration table test. The experimental data were analyzed with the general principle component piezoelectric vibration control rods control law.更多还原