ER 智能材料在结构振动控制中的应用

APPLICATION OF ER INTELLIGENT MATERIAL TO STRUCTURAL CONTROL

ＥＲ智能材料是一种可控流体，它在电场的作用下可从牛顿流体变为剪切屈服应力较高的粘塑性体，且这种转变连续，可逆，迅速。因此，可用它来制作可调阻尼器，实现对工程结构风振和地震反应的半主动控制。本文在简要地介绍了ＥＲ智能材料电流变效应的基本原理和影响因素之后，建立了适用于土木工程结构控制用的二种类型的ＥＲ可调阻尼器的工作原理和力学模型。并在介绍了ＥＲ可控阻尼器对工程结构风振和地震反应半主动控制的实施原则的基础上，提出了ＥＲ可调阻尼器在土木工程结构振动控制中的可应用范围。

ER intelligent material is a kind of controllable fluid.It can be transformed from the Newton fluid into the viscoplastic solid with a finite yield shear stress when an electric field is applied,and the transformation is continual,reversible and rapid.Therefore,the variable damper,by which the semiactive control for wind vibration and earthquake responses of engineering structures can be achieved,can be developed by the material. In the paper,the mechanical models of two kinds of ER variable dampers which are used to vibration control of civil engineering structures are established after introducing the basic principle and the influence factors of the electrorheological effect of ER intelligent material.On the basis of explaining the applied principle of semiactive control of ER controllable dampers for wind vibration and earthquake responses of engineering structures,the suitable range of ER variable dampers in civil engineering structures is presented.