新型粘滞-弹性阻尼器的力学性能试验与理论研究

研制开发了一种新型粘滞-弹性阻尼器,对DS1~DS8八种不同型号的粘滞-弹性阻尼器进行了低周循环加载试验和抗低周疲劳性能试验研究,研究了新型粘滞-弹性阻尼器的耗能性能、参数相关性能和抗低周疲劳性能,基于Kelvin模型建立了粘滞-弹性阻尼器的恢复力模型,并对该模型进行了验证分析。研究结果表明:粘滞-弹性阻尼器具有良好的耗能性能和抗低周疲劳性能,工作性能稳定、密封性好;基于Kelvin模型建立的粘滞-弹性阻尼器的恢复力模型能够很好地反映阻尼器的实际受力情况,理论与试验滞回曲线吻合性良好;阻尼器能够同时附加刚度和阻尼,并可兼作限位保护装置,在动力或静力荷载作用下均能发挥作用。

EXPERIMENTAL AND THEORY STUDY ON MECHANICAL PROPERTY OF A NEW VISCOUS-ELASTIC DAMPER

A new viscous-elastic damper was invented in this paper.Experiments on the hysteretic property and low-cycle fatigue property of the viscous-elastic dampers with eight types(DS1~DS8) were performed.Based on the experimental data,mechanical properties,such as energy dissipation performance,parameter related performance and fatigue performance,were investigated in detail.A restoring force model of the viscous-elastic damper was proposed according to the Kelvin model and the reliability of the restoring force model was verified by comparative study between experiment and theory results.Results show that the invented viscous-elastic dampers have a good energy dissipation performance and a low-cycle fatigue performance.And the dampers also have a stable work performance and excellent tightness.The restoring force model based on Kelvin model can well reflect the working condition of the new viscous-elastic dampers and a good agreement on hysteretic curves between the experiment and theory can be found.The viscous-elastic dampers can provide damping and stiffness for structures to resist actions of external excitations and can be used as a displacement-limited protective device.