水中悬浮隧道管段锚索耦合模型涡激振动研究  

Study of Vortex-induced Vibration of Submerged Floating Tunnel Tube-tether Coupled Model

作　　者：葛斐[1] 龙旭[1] 王雷[1] 洪友士[1] 

机构地区：[1]中国科学院力学研究所非线性力学国家重点实验室,北京100190

出　　处：《中国公路学报》2009年第3期83-88,100,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金重点项目(10532070);中国科学院知识创新工程重要方向项目(KJCX2-YW-L07);非线性力学国家重点实验室青年基金项目

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。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.

关 键 词：隧道工程 水中悬浮隧道 HAMILTON原理 动力响应 涡激振动 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]