板式电涡流阻尼单元的平面阻尼特性研究  

Study on the planar damping characteristics of the plate⁃type eddy current damper

作　　者：陈政清[1,2,3] 刘昕伯 黄智文[1,2,3] 郭文超 曹益文 张弘毅 CHEN Zhengqing;LIU Xinbo;HUANG Zhiwen;GUO Wenchao;CAO Yiwen;ZHANG Hongyi(Hunan Provincial Key Laboratory for Wind Engineering and Bridge Engineering,Hunan University,Changsha 410082,China;State Key Laboratory of Bridge Safety and Resilience,Hunan University,Changsha 410082,China;School of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学风工程与桥梁工程湖南省重点实验室,长沙410082 [2]湖南大学桥梁工程安全与韧性全国重点实验室,长沙410082 [3]湖南大学土木工程学院,长沙410082

出　　处：《东南大学学报(自然科学版)》2025年第2期317-325,共9页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(U214120106).

摘　　要：研究了板式电涡流阻尼单元(planar eddy current damper,PECD)的阻尼特性随平面振动方向的变化规律。首先,推导了PECD发生相对平移运动时电涡流阻尼力的理论计算公式,发现PECD相对平移运动产生的电涡流阻尼力并不一定与速度方向完全相反,其在平面直角坐标系上的2个分量可由一个2×2的平面阻尼系数矩阵与相对速度向量的乘积唯一确定。其次,分别选取4种典型永磁阵列的PECD,采用电磁有限元方法计算了它们的平面阻尼系数矩阵和阻尼力随速度方向的变化,验证了上述阻尼力理论计算公式的正确性,并提出了PECD的等效阻尼系数概念。然后,针对等效阻尼系数各向同性的PECD,在保证永磁体高度和投影面积不变的条件下,分析了其阻尼系数随永磁体数量和永磁体行、列间距的变化规律。最后,开展了阻尼系数各向同性PECD的阻尼系数测试试验,进一步验证了理论分析和有限元仿真的正确性。The variations of damping characteristics of the plate⁃type eddy current damper with vibration direc⁃tion were investigated.Firstly,the theoretical formula for the eddy current damping force generated by the relative translational motion of the planar eddy current damper(PECD)was derived.It was found that the eddy current damping force generated by the translational motion of PECD is not necessarily completely oppo⁃site to the velocity direction.Its two components in the Cartesian coordinate system can be uniquely deter⁃mined by the product of a 2×2 damping coefficient matrix and the relative velocity vector.Secondly,four typical permanent magnet arrays were selected for PECD,and their damping coefficient matrices and damping force variations with velocity direction were calculated using the electromagnetic finite element method.As a result,the correctness of the theoretical formula for damping force was verified,and the concept of an equiva⁃lent damping coefficient for PECD was proposed.Then,for PECD with equivalent damping coefficients isot⁃ropy,the variations of damping coefficient with the number of permanent magnets and the row and column spacing of permanent magnets were analyzed,under the prerequisite that the height and projection area of the permanent magnets remained unchanged.Finally,a damping coefficient test was conducted for an isotropic PECD to further verify the correctness of the theoretical analysis and finite element simulation.

关 键 词：调谐质量阻尼器 电涡流阻尼 振动控制 阻尼系数 

分 类 号：TU311.3[建筑科学—结构工程]