中文摘要：

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。

英文摘要：

In order to analyze dynamic response of submerged floating tunnel （SFT） in flow field under vortex-induced vibration, equations of motion control of submerged floating tunnel tube- tether were derived by Hamilton variation principle. Considering nonlinear coupling effect between the axial and transverse vibrations of tether, the dynamic response model of submerged floating tunnel was presented. Considering the influence of in-line vortex-induced vibration of tether, equations of motion control in time domain were solved. The calculated results show that if the tether slenderness ratio is large enough, the coupling effect between axial and transversal vibrations of tether can not be ignored. When the in-line vortex-induced vibration of tether occurs, the responses of SFT in surge and roll directions increase obviously, but the heave response is almost invariant.