垂度阻尼索的设计及对结构减振的试验研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (19) : 39-44.

论文

垂度阻尼索的设计及对结构减振的试验研究

禹见达1.2,彭临峰1,张湘琦1,彭剑1 ,陈政清3

作者信息 +

Design of sag damping cable and tests for its application in structural vibration control

YU Jianda1，2,PENG Linfeng1, ZHANG Xiangqi1, PENG Jian1，2,CHEN Zhengqing3

Author information +

文章历史 +

摘要

高耸结构在地震、强风或其它激励的作用下易发生大幅振动甚至倒塌，由于缺少阻尼器理想的安装位置，目前直接采用阻尼器对结构进行减振的效果并不理想。垂度阻尼索利用高耸结构与地面之间的相对位移，经过放大后驱动阻尼器进行耗能减振，是阻尼器对高耸结构减振的新尝试。为了研究垂度阻尼索对高耸结构的减振性能，首先制作了粘性阻尼系数可调节的电涡流阻尼器，并通过试验结果获得其粘性阻尼系数与磁铁数量的关系；然后采用主索、电涡流阻尼器和复位弹簧制作垂度阻尼索，并对模型结构进行了减振试验。研究结果表明：垂度阻尼索对高耸结构减振的效果随主索垂度减小而增大，随阻尼器粘性系数增大而增大，为结构提供的附加阻尼比可达30%以上，远大于现有减振措施所能提供的附加阻尼比。

Abstract

High-rise structures’ large amplitude vibrations and collapses easily happen under the action of earthquake, strong wind or other excitation.High-rise structures’ vibration reduction effect is not efficient using dampers directly at present due to the lack of ideal installation position of dampers.Sag damping cable is used to amplify the relative displacement between ground and high-rise structures and drive dampers for dissipating vibration energy of high-rise structures.This is a new attempt to reduce vibration of high-rise structures with dampers.Here, in order to investigate vibration reduction performance of sag damping cable for high-rise structures, an eddy current damper with adjustable viscous damping coefficients was developed, and the relationship between viscous damping coefficient and magnet number was obtained with test results.Then a sag damping cable was made with a main cable, an occurrence reset spring and an eddy damper.Vibration reduction test was conducted using the sag damping cable for a model structure.The results showed that the vibration reduction effect of the sag damping cable for high-rise structures increases with decrease in its main cable’s sag and increase in damper’s viscous damping coefficient; the additional damping ratio supplied by the sag damping cable for high-rise structures can reach more than 30%, this ratio is much larger than that provided by current other vibration reduction measures.

导出引用

禹见达1.2,彭临峰1,张湘琦1,彭剑1,陈政清3. 垂度阻尼索的设计及对结构减振的试验研究[J]. 振动与冲击, 2018, 37(19): 39-44

YU Jianda1，2,PENG Linfeng1, ZHANG Xiangqi1, PENG Jian1，2,CHEN Zhengqing3. Design of sag damping cable and tests for its application in structural vibration control[J]. Journal of Vibration and Shock, 2018, 37(19): 39-44

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