安装复位型压电摩擦阻尼器模型结构控振试验研究

Vibration control tests of a model structure installed with piezoelectric friction damper with reset function

设计具有复位功能的压电摩擦阻尼器,据输电塔模型结构受力及变形特点提出两种阻尼器安装方式,即杆件连接与绳索连接;对模型结构进行模拟地震振动台试验研究。基于两种阻尼器安装方式特点,建立以应变响应及速度响应为输入的模糊控制策略;测试EL-Centro地震波作用时输电塔结构模型在无控、被动控制及模糊控制下的地震响应。结果表明,压电摩擦阻尼器能有效减小模型结构的地震峰值效应;以应变、速度响应为输入的模糊控制算法,系统简单易于实际工程操作,能据结构动力反应实时调整阻尼器的摩擦力实现对结构减振控制。

A kind of piezoelectric friction damper with reset function was designed.According to the force and deformation characteristics of a transmission tower structure,two damper installation ways namely,the bar connection type and rope connection type were put forward.Corresponding simulated earthquake shaking table tests were carried out on a model structure.Based on the characteristics of the two ways of damper installation,a fuzzy control strategy with strain response and speed response as the inputs was established.Seismic responses of the transmission tower structure with non-control,passive control and semi-active control were tested under EL-Centro seismic wave excitation.The experimental results show that the piezoelectric friction damper can effectively reduce the seismic peak of the model structure under both the ways of damper installation.The fuzzy control algorithm with strain response and speed response as the inputs is simple in strusture and is easy to be operated in actual applications.It can change in real time the damper friction according to the dynamic responses of the structure to realize the vibration control of structures.