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水中悬浮隧道管段锚索耦合模型涡激振动研究

, PP. 83-88

Keywords: 隧道工程,水中悬浮隧道,Hamilton原理,动力响应,涡激振动

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Abstract:

?为了分析水中悬浮隧道在水流作用下的动力响应,通过Hamilton原理推导得到了悬浮隧道管段和锚索的运动控制方程;同时引入锚索横向和轴向变形之间的耦合作用,建立了悬浮隧道的动力响应模型,并考虑锚索发生顺流向涡激振动的影响,在时间域内求解运动控制方程。计算结果表明:若锚索长细比很大,则锚索横向和轴向变形之间的耦合作用不可忽略;锚索发生顺流向涡激振动时,结构的横荡和横摇响应幅值增大,但垂荡响应基本不受其影响。

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