管式电涡流阻尼力的精确测量及阻尼器优化设计  

Optimal design of tubular electric eddy damper and its damping force’s accurate measurement

作　　者：禹见达[1,2] 张湘琦 彭临峰 彭剑[1,2] YU Jianda;ZHANG Xiangqi;PENG Linfeng;PENG Jian(School of Civil Engineering,Hunan University of science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control,Hunan University of science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南科技大学结构抗风与振动控制湖南省重点实验室,湖南湘潭411201

出　　处：《振动与冲击》2020年第3期149-154,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11402085);湖南省教育厅科学研究重点项目(17A071)

摘　　要：采用紫铜管与磁铁制作了管式电涡流阻尼器,并提出了一种电涡流阻尼器阻尼力的精细化测量方法,消除了摩擦力和惯性力的影响,获得了精确的电涡流阻尼力。研究了阻尼力与电涡流阻尼器中磁级厚度、磁级间距、铜管与磁铁的相对速度等参数的关系;研究结果表明:提出的阻尼力测量方法可以准确地获得磁铁与铜管相互作用的阻尼力时程;阻尼器的阻尼系数随磁级厚度、磁级数的增加而增大,随磁级间距的增大表现出先增大、后减小的趋势;电涡流阻尼器近似为理想的黏性阻尼器,并且其阻尼系数与磁级数也近似成正比。通过引入阻尼系数效率值作为评价指标,获得了管式电涡流阻尼器的磁级厚度和磁级间距的最优值,可为电涡流阻尼器的优化设计提供参考。Here,Copper tubes and magnets were used to fabricate tubular electric eddy dampers.A precise measuring method for damping force of a tubular electric eddy damper was proposed to eliminate effects of friction and inertia force,and obtain accurate electric eddy damping force.Relations between damping force and magnetic pole thickness,pole spacing,relative speed of copper tube to magnet,etc.,respectively were studied.The results showed that damping force time history can be accurately obtained using the proposed measuring method;damping coefficient of the damper increases with increase in magnetic pole thickness and number of magnetic pole,and this coefficient firstly increases and then decreases with increase in pole spacing;electric eddy damper is approximately an ideal viscous one and its damping coefficient is directly proportional to number of magnetic pole;taking efficiency value of damping coefficient as the evaluation index,the optimal values for magnetic pole thickness and pole spacing of the tubular electric eddy damper are obtained to provide a reference for the optimal design of tubular electric eddy dampers.

关 键 词：结构振动控制 电涡流阻尼器 理想黏性阻尼器 阻尼系数测定 

分 类 号：O329[理学—一般力学与力学基础] TB34[理学—力学]