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压电材料是一种新型智能材料。本文将压电材料和被动摩擦阻尼器相结合设计出一种新型智能摩擦阻尼器,并采用基于经典最优控制理论的半主动控制策略对高耸钢塔结构风振反应的控制进行了研究,对国内即将兴建的第一高钢电视塔──合肥翡翠电视塔进行了算例分析。为满足摩擦阻尼器对高耸钢塔结构风振控制的特殊需要、文中还建立了房耸钢塔结构的空间桁架有限元模型和串联多自由度体系模型,并在形成广义控制力作用位置矩阵和计算摩擦阻尼器两端的相对位移的过程中综合地运用了这两种力学模型。本文研究表明,压电材料智能摩擦阻尼器可以有效地抑制高耸钢塔结构的风振反应。
Piezoelectric material is a new type of smart material. In this paper, a new type of intelligent friction damper is designed by combining piezoelectric materials and passive friction dampers. The semi-active control strategy based on the classical optimal control theory is used to control the wind-induced vibration response of the towering steel tower structure. China is about to build the first high-tech steel tower ─ ─ Hefei Jade TV Tower conducted a case study. In order to meet the special needs of friction dampers for wind-induced vibration control of towering steel towers, a space truss finite element model and a series of multi-degree-of-freedom system models for building steel tower structures are also established. The two mechanics models are used synthetically in the calculation of the relative displacements at both ends of the friction damper. The research in this paper shows that the piezoelectric material smart friction damper can effectively restrain the wind-induced vibration of towering steel tower structure.