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提供下面一篇文章,应该有些帮助!
环境激励下斜拉桥拉索的振动观测研究
Response Characterististics of Stay Cable under Ambient Excitation
关键词:斜拉桥,拉索振动,现场观测,时频分析,响应特征
作者:王修勇,陈政清,倪一清,胡建华
概述:斜拉桥拉索在风、风雨组合、交通荷载等环境激励下发生大幅振动,这种振动对拉索造成极不利的影响.为了研究拉索的振动机理和响应特征,在岳阳洞庭湖大桥建立了包括风速仪、雨量计、加速度传感器组成的拉索振动观测系统,进行了多次长时间观测.本文根据观测记录,采用时频分析、统计技术,对拉索涡振、风雨振、交通引起的振动等响应特征、振动与环境激励的关系、振动的模态参与性、索力变化等进行了研究,得到了一些对认识拉索振动机理、并进一步控制拉索振动具有意义的结果.
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