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摘要: 设计制作3个高阻尼黏弹性阻尼器,对其进行变形相关性和频率相关性的性能试验、疲劳性能试验及老化性能试验,以最大剪应力、存储剪切模量和等效黏滞阻尼比为指标研究阻尼器的性能规律,采用通用Bouc-Wen计算模型模拟其滞回曲线,并对比模拟结果和试验结果。研究结果表明:该阻尼器滞回曲线饱满、力学性能稳定,具有较强的耗能性能和大变形能力,抗疲劳性能和抗老化性能良好。变形对该新型高阻尼黏弹性阻尼器力学性能指标的影响明显,加载频率对其影响较小。Bouc-Wen模型的模拟结果与试验结果吻合良好。Abstract: This paper mainly presents an experimental study on three high damping viscoelastic dampers (VED). The maximum shear stress, storage shear modulus and equivalent viscous damping ratio were measured under different loading schemes to study the regularity of the viscoelastic damper properties. The dependency of the mechanical properties of the dampers on strain and loading frequency were studied. Fatigue test and aging test were also conducted. The hysteretic behaviour of the viscoelastic damper was carried out to do comparative research on the simulated and experimental results. It is concluded that these dampers exhibit full hysteresis loops and stable mechanical properties. The viscoelastic dampers exhibit good deformation properties and energy dissipation capacity, and their equivalent viscous damping ratios are higher. It is also found that the anti-fatigue property is excellent, and the anti-aging property is favorable. The dependency of the damper's mechanical properties on strain is obvious, while that on frequency is relatively small. The simulated results using Bouc-Wen model are consistent with the experimental results.
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