摘要
采用磁流变 (MR)阻尼器对我国第一座三塔斜拉桥——湖南岳阳洞庭湖大桥斜拉索的减振问题进行了试验研究。内容包括 :(1)设计试验装置 ;(2 )不装阻尼器的斜拉索自由振动试验 ;(3)装有 MR阻尼器的斜拉索自由振动试验。试验结果表明 ,安装 MR阻尼器可显著提高斜拉索的模态阻尼比。通过模态阻尼比随 MR阻尼器外加电压变化的关系 ,可得出拉索等效模态阻尼比的优化值 。
A full scale test of a stay cable incorporated with Magneto rheological (MR) dampers is performed on the Dongting Lake Bridge which is the first three pylon cable stayed bridge in China. The test consists of three parts: design of the experimental devices, field tests of the cable without and with dampers. Equivalent modal damping ratios of the cable versus the different voltage applied to MR dampers are obtained. Results of field tests show that the optimal damping ratios of cable with MR dampers under the voltage increase 4 to 7 times as compared with those without MR dampers, and provide some scientific basis for the effective vibration mitigation of the cables.
出处
《振动工程学报》
EI
CSCD
北大核心
2002年第4期447-450,共4页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目 (编号 :5 0 1780 13)
香港理工大学合作项目
