斜拉桥拉索减振阻尼器对拉索索力测量的影响研究
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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.
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.
引文
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[7]王朝华，李国蔚，何祖发，等．斜拉桥索力测量的影响因素分析[J]．世界桥梁，2004，(3)：64—67．
[8]王修勇，陈政清，倪一清，等．斜拉桥拉索磁流变阻尼器减振技术研究[J]．中国公路学报．2003，16(2)：52—56．
[9]Pacheco B M,Fujino Y,Sulekh A.Estimation curve formodal damping in stay cables with viscous damper[J].Journal of Structural Engineering,1993,119(6):1961—1979.
[2]刘志军，党志杰，罗元文，等．振动法测定缆索张力的研究[J]．桥梁建设，2002，(2)：26—29．
[3]林志宏，徐郁峰．频率法测量斜拉桥索力的关键技术[J]．中外公路，2003，23(5)：1—4．
[4]陈常松，陈政清，颜东煌．柔索索力主频阶次误差及支承条件误差[J]．交通运输工程学报，2004，4(4)：17—20．
[5]张宏跃，田石柱．提高斜拉索索力估算精度的方法[J]．地震工程与工程振动，2004，24(4)：82—85．
[6]王卫锋，韩大建．斜拉桥的索力测试及其参数识别[J]．华南理工大学学报(自然科学版)，2001，29(1)：18—21．
[7]王朝华，李国蔚，何祖发，等．斜拉桥索力测量的影响因素分析[J]．世界桥梁，2004，(3)：64—67．
[8]王修勇，陈政清，倪一清，等．斜拉桥拉索磁流变阻尼器减振技术研究[J]．中国公路学报．2003，16(2)：52—56．
[9]Pacheco B M,Fujino Y,Sulekh A.Estimation curve formodal damping in stay cables with viscous damper[J].Journal of Structural Engineering,1993,119(6):1961—1979.
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