采用万向支架陀螺仪的高耸结构减振控制研究  

Vibration control of high-rise structures using a gimbal gyroscope

作　　者：何浩祥[1] 葛腾飞[1] 丛茂林[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《振动与冲击》2012年第24期26-29,59,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51108009;50878010);高等学校博士学科点专项科研基金项目(20111103120022)

摘　　要：鉴于高耸结构的特殊形式和内部有限空间,传统的减振装置的安装和使用受到限制。万向支架陀螺仪的转子具有两个转动自由度,高速旋转时可产生具有抵抗水平正交两向位移的力矩,从而能约束或降低结构在外部动力作用下的变形。因此,提出在高耸结构上安装万向支架陀螺仪实现对结构水平及扭转振动控制的方法。阐述万向支架陀螺阻尼器的运动机理,建立安有陀螺阻尼器的结构多维减振体系控制运动方程。以一装有多个陀螺阻尼器的电视塔为算例,对结构在脉动风荷载和地震作用下的减振性能进行研究。结果表明,具有合理参数的万向支架陀螺阻尼器能有效降低结构在水平两向及扭转方向的振动。The installation and application of traditional vibration reduction dampers are inconvenient for high-rise structures due to their special shapes and limited interior spaces. The rotor of a gimbal gyroscope has two rotating degrees of freedom, and the gyroscope produceds moments to resist two orthogonal displacements when its rotor rotates with high speed. Hence, the structural deformation of a high-rise building installed with a gimbal grroscope under external loads can be reduced. Here, a method for installing some gimbal gyroscopes on a high-rise structure to reduce its structural horizontal and torsional vibrations was presented. The movement mechanism of a gimbal gyroscope damper was formulated, and the dynamic equation for a multi-dimensional control system with gyroscope dampers was established. A steel TV tower with gyroscope dampers was analyzed to study its vibration control performance under fluctuating wind loadings and earthquake action. The results showed that the dynamic responses of a high-rise structure can be reduced effectively using ginbal gyroscope dampers with appropriate parameters.

关 键 词：陀螺仪 高耸结构 风振 地震作用 结构控制 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3