磁致负刚度电涡流惯质阻尼器力学性能试验与仿真  

Numerical simulation and experimental study on mechanical properties of a magnetic negative stiffness eddy-current inertia damper

作　　者：尹光照 汪志昊 程志鹏 郑梦斐 刘洋 YIN Guangzhao;WANG Zhihao;CHENG Zhipeng;ZHENG Mengfei;LIU Yang(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学土木与交通学院,郑州450045

出　　处：《振动与冲击》2022年第10期309-316,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51878274);桥梁结构安全技术国家工程实验室(北京)开放课题(2020-GJKFKT-9);华北水利水电大学研究生教育创新计划(YK2020-12)。

摘　　要：为提升传统阻尼器的耗能减振效率,融合磁致负刚度单元、旋转式电涡流阻尼单元与滚珠丝杠两节点惯质单元,发展与研制了一种新型三元被动减振装置-磁致负刚度电涡流惯质阻尼器(magnetic negative stiffness eddy-current inertia damper,MNSEID)。首先阐明了MNSEID的整体构造、工作原理及力学模型;然后综合理论分析、三维电磁场有限元仿真与样机力学性能试验,获得了MNSEID的轴向出力特征,建立了磁致负刚度的精准计算分析方法;最后验证分析了MNSEID力学模型的适用性。结果表明:MNSEID的磁致负刚度系数随激振频率的增大基本保持不变,而等效电涡流阻尼系数随激振频率的增大呈现下降趋势;不同于现有位移相关型负刚度阻尼器,MNSEID表现出“准恒定”磁致负刚度特征。To improve the energy dissipation efficiency of the traditional damper,a new three-element passive damping devices called the magnetic negative stiffness eddy-current inertia damper(MNSEID)was proposed,which integrates magnetic negative stiffness element,rotary eddy-current damping element,and a two-node inertial element based on the ball screw.First,the overall conformations,working principles,and mechanical model of the MNSEID were demonstrated respectively.Through the theoretical analysis,the three-dimensional electromagnetic finite-element simulation analysis and the mechanical performance test,axial force characteristics and magnetic negative stiffness calculation method of the MNSEID were further obtained.Finally,the applicability of mechanical model of the MNSEID was well verified based on the comparisons of the experimental and simulation results.The results show that the magnetic negative stiffness coefficient of the MNSEID is stable with the increase of excitation frequency,while the eddy-current damping coefficient of the MNSEID decreases with the increase of excitation frequency.Different from the available displacement-dependent negative stiffness damper,the MNSEID possesses a typical Quasi-constant magnetic negative stiffness characteristic.

关 键 词：三元被动控制 磁致负刚度 电涡流阻尼 惯性质量 力学性能 

分 类 号：TU352.1[建筑科学—结构工程]