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Test of Vibration Mitigation of a Stay Cable on the Dongting Lake Bridge
Author(s): 
Pages: 447-450
Year: Issue:  4
Journal: JOURNAL OF VIBRATION ENGINEERING

Keyword:  斜拉桥MR阻尼器模态阻尼比减振;
Abstract: 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,为实现拉索的有效减振提供了科学依据.
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