基于磁粉离合的变惯质阻尼器理论及试验研究  

The Theory and Experimental Research of Adjustable Inertial Damper Based on Magnetic Particle Clutches

作　　者：孙洪鑫[1] 贺杜鹏 Sun Hongxin;He Dupeng(Department of Civil Engineering,Hunan University of Science and Technology,Xiangtan 430112,China)

机构地区：[1]湖南科技大学土木工程学院,湘潭430112

出　　处：《动力学与控制学报》2023年第5期76-85,共10页Journal of Dynamics and Control

基　　金：国家自然基金资助项目(52078210);湖南省杰出青年科学基金项目(2021JJ10003)。

摘　　要：针对超长斜拉索振动主模态区间多变的特点,磁粉离合惯质阻尼器作为半主动变惯质阻尼器对比被动惯质阻尼器更具优势.根据已有研究发现,仅向磁粉离合惯质阻尼器输入直流电并不能实现阻尼器惯质系数恒值可调的功能,本文通过输入简谐电流的方法实现该功能.首先,介绍了磁粉离合惯质阻尼器基本原理及其力学特性,从磁粉离合器双轴相对运动状态来分析磁粉离合器在不同电流工况下的力学性质,进而研究实现阻尼器变惯质功能的输入电流控制算法.然后,综合阻尼器基本构造建立了其力学模型,从而得出阻尼器在稳态激励条件下的等效惯质系数表达式,阐明了阻尼器在输入控制电流下的等效惯质系数与控制电流幅值呈二次线性关系.最后,通过实验对阻尼器惯质系数的可调性进行了验证.In light of the changeable primary mode interval of ultra-long stay cable vibration,the inertial damper of magnetic particle clutch has greater advantages as a semi-active inertial damper than as a passive inertial damper.Existing research,however,indicates that simply injecting direct current into the magnetic particle clutch’s inertial damper would not be sufficient to realize the Constant-value regulated function of the damper’s inertial coefficient.This function will be accomplished in this study by inputting harmonic current.First,the fundamental operation and mechanical features of the magnetic particle clutch’s inertial damper are described.From the relative motion state of the two magnetic particle clutch axes,the mechanical characteristics are evaluated,and the control method for the input current to realize the adjustable function of the inertial coefficient of the damper of the damper is explored.The equivalent inertial coefficient of the damper under steady-state excitation is then expressed,and the mechanical model of the damper is developed based on the damper’s fundamental structure.The equivalent inertial coefficient of the damper under input control current and the amplitude of the control current are eventually shown to have a quadratic linear relationship.Lastly,the inertial coefficient of the damper’s adjustability was verified experimentally.

关 键 词：振动控制 磁粉离合惯质阻尼器 控制算法 减振器 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]