粘滞质量阻尼器模型的频域与时域分析

摘要

忽略摩擦力,考虑惯性效应和阻尼效应,建立了粘滞质量阻尼器的力学模型.提出3种带有阻尼器模型的单自由度系统,进行无量纲参数化分析,分别从频域和时域研究该类型阻尼器的减振效果.对比研究表明:阻尼器延长了结构的自振周期,所提出的阻尼器模型3对降低长周期地震作用下的结构位移反应和加速度反应都有显著的效果.%In this study,ignoring the effect of friction,considering inertial effectiveness and damping effectiveness,a mechanical model of viscous mass damper (VMD) is founded.Three single degree of freedom(SDOF) systems equipped with VMD are proposed to make analysis on non-dimensional parameters.Frequency-domain and time-domain analysis of VMD is used to study vibration-reduction effect.Finally,the effectiveness of three SDOF systems is compared.The result shows that VMD extends the vibration period,particularly,the proposed damper model 3 of SDOF systems can significantly reduce displacement response and acceleration response for long-period earthquakes.