基于Halbach阵列轴向式电涡流阻尼器性能提升  

Performance enhancement of axial eddy current dampers based on halbach arrays

作　　者：朱前坤[1] 梁玉坤 王宪玉 杜永峰[1] ZHU Qiankun;LIANG Yukun;WANG Xianyu;DU Yongfeng(Institute of Earthquake Protection and Disaster Mitigation,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Province Transportation Planning and Survey Design Institute Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]兰州理工大学防震减灾研究所,兰州730050 [2]甘肃省交通规划勘察设计院股份有限公司,兰州730030

出　　处：《振动与冲击》2024年第22期45-52,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(52168041);甘肃省重点研发计划(22YF11GA301)。

摘　　要：为了提高轴向式电涡流阻尼器的阻尼性能,引入Halbach阵列,建立了Halbach阵列轴向式电涡流阻尼器(Halbach array axial eddy current damper,HAECD)模型。首先,阐明了HAECD的整体构造、工作原理与力学特性,采用三维电磁场有限元瞬态分析方法验证电涡流单元阻尼系数计算的准确性;然后,建立四种阵列方式的电涡流阻尼单元计算模型并进行了优化分析;最后,分析了永磁体厚度、磁化角度及磁极配比对HAECD阻尼系数的影响。研究结果表明:Halbach阵列相较于其他阵列方式,在同等磁体体积情况下的阻尼系数提升率最高可达59.2%;针对本装置,适当增加永磁体厚度能有效提升阻尼系数,最优磁体厚度为31 mm;当磁化角度为2°时,阻尼系数最大;阻尼系数随着磁极配比的增大而逐渐缓慢增加,当磁极配比为2.5时,阻尼性能最优。In order to improve the damping performance of axial eddy current dampers,the model of an axial eddy current damper with Halbach array axial eddy current damper(HAECD) was established by introducing the Halbach permanent magnet array.Firstly,the overall structure,working principle and mechanical properties of the HAECD were expounded,and the three-dimensional electromagnetic field finite element transient analysis method was used to verify the accuracy of the eddy current element damping coefficient calculation.Then,the eddy current damping element calculation models for four array modes were established and optimized.Finally,the effects of the permanent magnet thickness,magnetization angle and magnetic pole ratio on the damping coefficient of the HAECD were analyzed.The results show that compared with other modes of arrays,the damping coefficient of the Halbach array is increased by up to 59.2% under the same magnet volume.For this device,properly increasing the thickness of permanent magnet can effectively increase the damping coefficient,the optimal magnet thickness is 31 mm,and the maximum damping coefficient is obtained when the magnetization angle is 2°.The damping coefficient increases slowly with the increase of magnetic pole ratio,and the damping performance is the best when the magnetic pole ratio is 2.5.

关 键 词：桥梁结构 振动控制 阵列优化 参数分析 HALBACH阵列 

分 类 号：TU352.1[建筑科学—结构工程]