东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (11): 1650-1654.DOI: 10.12068/j.issn.1005-3026.2016.11.027

• 机械工程 • 上一篇    下一篇

简谐激励下磁流变弹性体支撑悬臂梁碰撞特性分析

刘子良， 赵倩， 王重阳， 闻邦椿   

  1. (东北大学 机械工程与自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2015-07-13 修回日期:2015-07-13 出版日期:2016-11-15 发布日期:2016-11-18
  • 通讯作者: 刘子良
  • 作者简介:刘子良(1984-)，男，河北保定人，东北大学博士研究生； 闻邦椿(1930-)，男，浙江温岭人，东北大学教授，博士生导师，中国科学院院士.
  • 基金资助:
    国家重点基础研究发展计划项目(2011CB706504).

Impact Analysis of Cantilever Beams Supported by MRE with Harmonic Excitation

LIU Zi-liang， ZHAO Qian， WANG Chong-yang， WEN Bang-chun   

  1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2015-07-13 Revised:2015-07-13 Online:2016-11-15 Published:2016-11-18
  • Contact: LIU Zi-liang
  • About author:-
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摘要： 利用磁流变弹性体在外加磁场作用下刚度可调可控的特点，基于剪切受力方式，设计以磁流变弹性体作为主要弹性元件的支撑结构，搭建简谐激励作用下悬臂梁碰撞故障实验系统.对不同外加磁场控制电流作用下系统的振动响应特性进行了实验测试，分析和研究了系统在不同控制电流下的移频降幅性能，以及碰撞工况下的振动响应.实验结果表明:在控制电流作用下，能有效增加磁流变弹性体的刚度，实现系统的固有频率和振幅的可控性；控制悬臂梁碰撞故障严重程度，提高设备寿命.

关键词: 悬臂梁, 磁流变弹性体, 碰撞, 移频, 降幅

Abstract: Using the adjustable and controllable characteristics of MRE (magnetorheological elastomers) under the action of applied magnetic fields， the structural support which takes MRE as the main elastic component was designed， and the cantilever beam’s impact fault experimental system with harmonic excitation was established based on the mode of shear force. Then， the experimental tests of vibration response under the action of control currents with different applied magnetic fields were carried out， and the performances of frequency shift and amplitude reduction of the system as well as the vibration response under the condition of impact were analyzed. The results showed that the stiffness of MRE is increased effectively with the control current， the controllability of natural frequency and amplitude of the system is then realized， and the severity of impact fault becomes controllable and the equipment life is thereby improved.

Key words: cantilever beam, MRE (magnetorheological elastomers), impact, frequency shift, amplitude reduction

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