阻尼器劣化对拉索风致振动的影响

Effect of damper deterioration on control of cable wind induced vibration

以孔隙式粘滞阻尼器减振索为研究对象,研究空气混入流体后阻尼器的附加刚度变化和对拉索减振性能的影响。以sap2000建立拉索的减振仿真模型,分析阻尼器劣化后对拉索跨中位移幅值和对应的阻尼器耗能指标的影响。研究表明阻尼器劣化后附加刚度发生变化,改变了拉索-阻尼器系统在风荷载作用下的减振效果。当劣化程度较小时,影响程度较小,基本可忽略不计。

Taking the damping cable of porous viscous damper as the research object,the influence of the additional stiffness of the damper on the vibration reduction performance of the cable after air mixing with fluid is studied.Based on SAP2000,the simulation model of cable vibration reduction is established,and the influence of damper deterioration on the mid span displacement amplitude of cable and corresponding damper energy dissipation index is analyzed.The results show that the additional stiffness changes after the damper deterioration,which changes the damping effect of cable damper system under wind load.When the degradation degree is small,the impact is small and can be ignored.