| 粘弹性阻尼器对斜拉桥拉索的振动控制研究 |
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| 引用本文： | 陈水生,孙炳楠,胡隽.粘弹性阻尼器对斜拉桥拉索的振动控制研究[J].土木工程学报,2002,35(6):59-65. |
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| 作者姓名： | 陈水生 孙炳楠 胡隽 |
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| 作者单位： | 1. 浙江大学;华东交通大学
2. 浙江大学 |
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| 摘 要： | 考虑索的抗弯刚度及垂度的影响 ,推导了索的空间自由振动微分方程 ,结合分离变量及中心差分法将偏微分方程在空间内离散 ,用状态空间法求解复模态特征方程 ,从而求出系统的最大模态阻尼比 ,并求出最优阻尼器系数。对不同索参数及不同阻尼器参数的典型斜拉索 ,计算了索的面内外模态阻尼特性。研究结果表明 :索的垂度对面内一阶模态阻尼比有较大的影响 ,对其它模态阻尼比则影响很小 ,也不影响最优阻尼器系数的大小 ;而抗弯刚度则对模态最大阻尼比及最优阻尼器系数均有影响。为斜拉桥拉索的阻尼器设计 ,提供了重要参考依据
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| 关 键 词： | 斜拉索 粘弹性阻尼器 抗弯刚度 垂度 |
| 文章编号： | 1000-131X(2002)06-0059-07 |
| 修稿时间： | 2001年7月4日 |
CABLE VIBRATION CONTROL RESEARCH ON CABLE- STAYED BRIDGE WITH VISCOUS DAMPER |
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| Chen Shuisheng , Sun Bingnan Hu Juan.CABLE VIBRATION CONTROL RESEARCH ON CABLE- STAYED BRIDGE WITH VISCOUS DAMPER[J].China Civil Engineering Journal,2002,35(6):59-65. |
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| Authors: | Chen Shuisheng Sun Bingnan Hu Juan |
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| Affiliation: | 1 Zhejiang University 2 East-China Jiao Tong University |
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| Abstract: | The effect of viscous damper on the stay cable is studied in the paper.The differential equation for space free vibration is derived .It is taken into consideration such as the bending stiffness,cable sag,and cable inclination.The complex eigenvalue cequations are solved by the state space method.Both the maximum modal damping ratio and the optimal damper size are obtained.Some stay cables are investigated for both the in-plane and out-plane modes with different parameters.The results show that the damping ratio of first in-plane mode is significantly affected by the cable sag.At sametime,some valuable suggestions are proposed in the paper. |
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| Keywords: | Stay Cable Viscoelastic Damper Bending Stiffness Sag |
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