摘要
研究了拉索减振阻尼器对拉索模态频率的影响,提出了考虑拉索垂度的拉索-阻尼器系统模态频率的分析方法,以岳阳洞庭湖大桥A11号拉索为例,得到了阻尼器安装相对高度、阻尼系数对拉索模态频率的影响程度和规律及消除阻尼器对索力测量精度影响的方法。结果表明,采用高阶模态频率能更准确测量拉索索力。
The relationship between the modal frequencies of stay cable attached with damper and the damper pa- rameters were investigated.The method for analyzing modal frequencies of cable-damper system was proposed.Taking No.A11 cable of Dongting Lake Bridge as an example,the curves of modal frequencies versus relative installed height of attached damper and damping coefficient were obtained.Results show that the more precise measurement of cable tension for the stay cable attached with dampers can be achieved if higher modal frequency of the stay cable is adopted in tension estimation.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第11期80-82,共3页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50578063)
湖南省教育厅重点项目(04A014)
关键词
斜拉索
阻尼器
索力测量
stay cable
damper
measurement of cable tension
