文档介绍：磁流变弹性体隔振器的设计与振动特性分析*
魏克湘 1, 2 孟光 2 夏平 1 白泉 1
(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)
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。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。
关键词:磁流变弹性体主被动一体控制隔振器振动响应
中图分类号:TB535
Design and Vibration Characteristics Analysis of MR Elastomer Isolators
WEI Kexiang 1, 2 MENG Guang 2 XIA Ping 1 BAI Quan 1
(1. Department of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411101;
2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200030 )
Abstract:orheological(MR) elastomer is a new kind of orheological materials. It is an interesting candidate for
active­passive hybrid vibration control of structural systems because it has both advantages of orheological 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 vibration­isolation effects are studied. Experimental results
show the amplitudes and frequencies of vibration response peaks can be changed by the applied electric current and the
vibration­isolation 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 applied a control current, and can be
used to structure active­passive hybrid vibration isolation system.
Key words:orheological elastomer Active­passive hybrid vibration control Isolator Vibration resp