【摘要】 用填充颗粒群的盒子代替调谐质量阻尼器的质量块,形成一种新型调谐质量阻尼器。通过对比单自由度排架不附加、附加该新型调谐质量阻尼器的自由振动,白噪声激励以及实际地震输入下的振动台试验,考察了该新型阻尼器对结构的减振控制效果。试验研究表明:颗粒的填充率对振动衰减影响明显,表现出双峰值的曲线特征;颗粒质量对衰减率的影响不明显,实际工程可以采用轻质颗粒材料;输入地震波能量与衰减率呈抛物线形。试验还从振型特性方面表明采用调谐颗粒阻尼器有利于减轻结构振动响应。更多还原

【Abstract】 A new type of tuned mass damper was generated by taking advantage of a box filled with particles instead of solid mass. The vibration reduction effects with or without this new damper under free vibration,white noise stimulation and onsite earthquake excitations were investigated by a series of shaking table tests. A bent frame with single degree of freedom was selected as the main structure in the experiments. It is shown that the filling ratio of particles has a significant influence on the vibration control,revealing the characteristics of bimodal curve; lightweight materials could be applied in practice owing to the slight effect of the particle mass on vibration reduction; a parabolic curve reveals the relationship between the input energy of seismic waves and the vibration damping. Also,the tests verify the effective vibration reduction performance of the new type of tuned mass damper from the aspect of vibration mode control.更多还原