粘弹性阻尼器是一种常用的被动减震装置，其耗能特性主要受温度、频率和应变幅值的影响。文中介绍粘弹性阻尼器的基本结构和工作机理，根据分数微分模型进行数值计算，编制电算程序，分别改变程序中温度、频率和应变幅值，根据所得的滞回曲线计算储存刚度、损失刚度和损失系数，讨论3种相关因素的影响，据此评定粘弹性阻尼器的软化特性和耗能能力。%The viscoelastic damper is a kind of passive damping device and its energy dissipation characteristics are mainly influenced by temperature,frequency and strain amplitude. Firstly,this paper introduces the basic struc-ture and working mechanism of viscoelastic dampers. Secondly,we write a corresponding computer program accord-ing to the numerical calculation method of fractional derivative model,change the temperature,frequency and strain amplitude in the program respectively and calculate the storage stiffness,loss stiffness,loss coefficient according to the hysteretic curve. Finally,we discuss the effect of three kinds of related factors,which is used to evaluate the softening characteristics and the energy dissipation ability of the viscoelastic damper.
展开▼
