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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。
In order to analyze the dynamic response of underwater suspended tunnel under water flow, the governing equations of the suspended tunnel section and anchor cable are deduced by the Hamilton principle. At the same time, the coupling between the lateral and axial deformation of the cable is introduced to establish the suspended tunnel Dynamic response model, and consider the influence of downstream vortex-induced vibration of cable, and solve the motion control equation in the time domain. The calculation results show that the coupling effect between the cable lateral and axial deformation can not be neglected if the slenderness ratio of the cable is large. When the cable anomaly occurs, the amplitudes of the swaying and rolling responses increase Large, but the basic response is not affected.