自供能电流变弹性体减振器的设计与特性分析

The Structural Design and Experimental Research of Self-Energized ERE Damper

新型智能材料电流变弹性体是电流变材料的衍生体,兼有电流变液和弹性体的优点,在主被动的振动控制领域中有着极大的应用前景。基于电流变弹性体的刚度和阻尼可电控调节的特性以及压电陶瓷的正压电效应,研制一种基于D33挤压模式的压电自供能电流变弹性体减振器,并对其在不同激励和场强下的振动响应特性进行实验分析。试验数据表明相比无场强条件下,在压电供电和1 000 V恒压的条件下能有效增大电流变弹性体结构阻尼,改变减振器振动响应谱峰值的频率和幅值,提高系统的隔振效果。

Eleetrorheologicalelastomer（ERE） is a new branch of electrorheologieal materials. It is an interesting candidate for active-passive hybrid vibration control of structural systems because it has both advantages of electrorheological fluid and elastomer material. Use of the stiffness and damping of the electrorheological elastomer can be electric control and piezoelectric effect of piezoelectric ceramics, a ERE damper which based on the squeezing mode is designed and manufactured. Vibration responses of the damper are experimentally tested under different applied electric field and excited. Experimental results show that under the conditions of piezoelectric power supply and plus 1000v electric field the amplitudes and frequencies of vibration response peaks can be changed compared and increase the electrorheological elastomer damping with no field conditions. It can effectively improve the effect of vibration isolation system.