楠溪江大桥斜拉索惯质阻尼与黏滞阻尼减振性能对比
Vibration Reduction Performance Comparison of Inertial Damping and Viscous Damping of Nanxi River Bridge Stay Cables
万进明 1康景泉 1徐振扬 1邹嘉炜 1顾益青 1毛家序2
作者信息
- 1. 中国铁路上海局集团有限公司,上海 200000
- 2. 中铁大桥局集团第四工程有限公司,湖北 武汉 430000
- 折叠
摘要
针对楠溪江大桥斜拉索的振动控制问题,提出斜拉索黏滞阻尼器和斜拉索惯质阻尼器减振两种技术方案.运用有限差分法,以楠溪江大桥编号为SG-15 斜拉索为减振目标,分别建立斜拉索惯质阻尼和黏滞阻尼有限差分数值模型,通过多模态减振参数优化和复模态特征值分析,以阻尼比表征斜拉索多阶模态的控制性能并进行对比.结果表明,以楠溪江大桥斜拉索前五阶模态为控制目标时,斜拉索惯质阻尼比黏滞阻尼的减振性能提升 8.7%,而当控制目标为前十五阶时,惯质系数及其作用变小,使得两者总体减振性能基本一致,但惯质阻尼对个别模态的减振性能仍会更好.
Abstract
In view of the vibration control of cable in Nanxi River Bridge,two technical schemes of vibration damping are proposed.U-sing the finite difference method,the numerical model of inertial damping and viscous damping finite difference is established respec-tively,and the analysis of the control performance of multiple mode is characterized by the damping ratio and comparison.The results show that in Nanxi River Bridge stay cable before the fifth order model for control target,cable inertial damping than viscous damping performance of 8.7%,and when the control target for the first fifteen order,inertia coefficient and its effect,makes the overall vibration performance is consistent,but the inertial damping of individual mode damping performance will still be better.
关键词
斜拉索/黏滞阻尼/惯质阻尼/有限差分模型Key words
stay cable/viscous damping/inertial damping/finite difference model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据