竖向板式电涡流调谐质量阻尼器的阻尼系数研究

Study on Damping Coefficient of Vertical Plate Eddy Current Tuned Mass Damper

根据电涡流阻尼系数的计算公式,设计了一种竖向板式电涡流调谐质量阻尼器(TMD),对磁铁尺寸、导体板表面磁感应强度、导体板厚度等影响阻尼系数的因素进行了试验,并通过电磁仿真软件对试验结果进行拟合,同时对未涉及的背板厚度及导体板材质两个影响因素进行了数值模拟分析,试验结果和数值模拟结果较为吻合。试验及数值模拟结果表明:电涡流TMD的阻尼系数随着磁铁投影面积的增加呈现出线性增长;电涡流TMD的阻尼系数随着铜磁间隙的增加呈现负指数形式减少,随着磁铁间距的增加呈现先增大后减小的趋势;电涡流TMD的导体板选择8mm厚的铜制导体板效果较好,且更为经济。

According to the formula of eddy current damping coefficient,a vertical plate type eddy current tuned mass damper(TMD)is proposed in this paper.The factors affecting the damping coefficient,such as magnet size,magnetic induction intensity on the conductor plate surface,and conductor plate thickness,are analyzed experimentally.The test results were fitted by electromagnetic simulation software,and the two influencing factors of back plate thickness and conductor plate material,which were not covered,were also analyzed by numerical simulation.The experimental results and numerical simulation results are in good agreement.The test and numerical simulation results show that the damping coefficient of the eddy current TMD shows a linear increase with the increase of magnet projection area,a negative exponential decrease with the increase of copper-magnetic gap,and a trend of increasing and then decreasing with the increase of magnet spacing.The conductor plate selection of 8 mm thick copper conductor plate can present a favorable result and is economical.