磁流变弹性体隔振器的设计与振动特性分析  

Design and Vibration Characteristics Analysis of Magnetorheological Elastomer Isolators

作　　者：魏克湘[1,2] 孟光[2] 夏平[1] 白泉[1] 

机构地区：[1]湖南工程学院机械工程系,湘潭411101 [2]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《机械工程学报》2011年第11期69-74,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(10802029);湖南省科技计划(2010GK3098)资助项目

摘　　要：磁流变弹性体是磁流变材料的一个新的分支,兼有磁流变液和弹性体的优点,在结构振动的主被动一体控制中有着广泛的应用前景。利用磁流变弹性体的可控刚度和阻尼特性,基于挤压式受力方式,设计一种磁流变弹性体隔振器,并对其在不同外加控制电流和激励频率下的振动响应特性进行了相关试验测试,分析和研究外加控制电流和激励频率对隔振器的振动响应特性和隔振效果的影响。试验结果发现,在外加电流的作用下,磁流变弹性体能有效增大结构阻尼,改变隔振器振动响应谱峰值的频率和幅值,提高系统的隔振效果。结果表明所设计的磁流变弹性体隔振器能在外加电流的控制下,实现对结构振动响应峰值的移频和减幅作用,具有较好的主被动一体减振效果。Magnetorheological（MR） elastomer is a new branch of magnetorheological materials.It is an interesting candidate for active-passive hybrid vibration control of structural systems because it has both advantages of magnetorheological fluid and elastomer material.Based on the squeezing mode,a MR elastomer isolator is designed and manufactured.Vibration responses of the isolator are experimentally tested under different applied electric currents and excited frequencies.The influences of applied electric current and excited frequency on the dynamic response characteristics and vibration-isolation effects are studied.Experimental results show the amplitudes and frequencies of vibration response peaks can be changed by the applied electric current and the vibration-isolation effect can be improved by an external electric current.It is demonstrated that the MR elastomer isolator has the adaptive ability of shifting its natural frequency and decreasing the vibration amplitudes when a control current is applied,and can be used in structure active-passive hybrid vibration isolation system.

关 键 词：磁流变弹性体 主被动一体控制 隔振器 振动响应 

分 类 号：TB535[理学—物理]