Damping effects of nonlinear dampers on a shallow cable
Damping effects of nonlinear dampers on a shallow cable
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非线性阻尼器对浅索的阻尼效应
DOI：
10.1016/j.engstruct.2019.109305
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发表时间：
2019-10
影响因子：
5.5
通讯作者：
Chen Lin
中科院分区：
文献类型：
--
作者：
Sun Limin;Xu Yuyuan;Chen Lin
This study investigates the damping performance of nonlinear dampers on a shallow cable for vibration control. For this purpose, a method is presented to appreciate the system damping based on periodically forced vibration analysis. Furthermore, the reduced-order model for cable-damper systems in the literature is improved to analyze the near-resonant responses of the system and to consider two dampers installed respectively near the two cable ends. The method is then verified based on a cable attached with linear dampers and further applied to a shallow cable with one and two nonlinear viscous dampers. By grouping the damper and cable parameters appropriately, the damping curves of linear cable-damper systems are extended to shallow cables with nonlinear dampers, which are useful for damper design in practice. Extensive numerical studies are subsequently conducted for shallow cables of varying sag-extensibility parameter attached respectively with one viscous damper and two viscous dampers of different nonlinearity near cable ends, focusing on the sag affected vibration modes. The numerical results suggest that when the sag-extensibility parameter is small, a nonlinear damper is superior to a linear damper in terms of maximal damping effect for these modes, owing to the nonlinearity induced energy bleeding effect. Interestingly, in a particular range of the sag-extensibility parameter, the maximal damping of these modes achieved by a nonlinear damper is smaller than that by an optimal linear damper. It is also suggested that when two dampers are installed symmetrically near the cable ends, the damping effect for a symmetric mode is considerably different from the summation of the optimal damping achieved by each damper alone, and the optimal damper coefficient varies as well. The difference depends on the sag-extensibility parameter and the damper nonlinearity.
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影响因子：
4.7
作者：
Qiang Zhou;S. Nielsen;W. Qu
通讯作者：
Qiang Zhou;S. Nielsen;W. Qu
DOI：
--
发表时间：
2001
期刊：
Journal of Changsha Railway University
影响因子：
--
作者：
Wang Xiu
通讯作者：
Wang Xiu
影响因子：
5.5
作者：
You‐lin Xu;Z. Yu;J. Ko
通讯作者：
You‐lin Xu;Z. Yu;J. Ko
柔性结构振动控制非线性阻尼器标定中的残余模态修正
影响因子：
4.7
作者：
Sun Limin;Chen Lin
通讯作者：
Chen Lin
影响因子：
5.4
作者：
Matteo Izzi;L. Caracoglia;S. Noè
通讯作者：
Matteo Izzi;L. Caracoglia;S. Noè