调谐质量阻尼器和调谐型颗粒阻尼器减震性能对比研究

基于5层钢框架模型,通过试验对比了在地震激励下调谐质量阻尼器和调谐型颗粒阻尼器的减震性能,并探究了频率失调等因素的影响。通过数值模拟实现了两种阻尼器的优化设计,以考察充分发挥其性能的工况下,两种阻尼器的减震效果以及阻尼器相对位移行程的对比。研究表明：在频率调谐时,调谐质量阻尼器和调谐型颗粒阻尼器均能显著降低主体结构位移和加速度响应,调谐型颗粒阻尼器的减震效果更好,具有一定的减震优势,并且调谐型颗粒阻尼器的相对位移行程更小、减震频带更宽;当两者均为最优设计时,减震效果相当,但是最优化调谐型颗粒阻尼器系统的阻尼器与主体结构之间的相对位移更小,可降低相对位移幅值24.5%,并且具有更好的鲁棒性。

Comparison study of damping performance between tuned mass damper and tuned particle damper

Based on a five-story steel frame, this paper compares the damping performance of tuned mass damper and tuned particle damper under earthquake excitations, and explores the influence of factors such as the frequency detuning effects. In addition, the optimal design of tuned mass damper and tuned particle damper is realized through numerical simulation, so that the damping performance and the relative displacement stroke of the two kinds of dampers can be compared when they are both optimally designed. The results show that both the tuned mass damper and the tuned particle damper can significantly reduce the displacement and acceleration response of the primary structure under frequency tuning cases, in which the tuned particle damper has better damping effect with certain damping advantages, and has a smaller relative displacement stroke and a wider damping bandwidth. The results also show that when both dampers are optimally designed, the damping effects are equivalent. However, the relative displacement between the damper and the primary structure of the optimized tuned particle damper system is smaller; the relative displacement amplitude can be reduced by 24.5% compared to that of the tuned mass damper. Besides, the optimized tuned particle damper system has better robustness.