冲击荷载作用下水中悬浮隧道的位移响应  

Displacement Responses of Submerged Floating Tunnels Under Impact Loads

作　　者：张嫄[1] 董满生[1,2] 唐飞[1] 

机构地区：[1]合肥工业大学交通运输工程学院,合肥230009 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《应用数学和力学》2016年第5期483-491,共9页Applied Mathematics and Mechanics

基　　金：交通运输部建设科技项目(2013318740050);中国博士后科学基金(20110490833);国家山区公路工程技术研究中心项目(GSGZJ-2014-05)~~

摘　　要：建立冲击荷载作用下悬浮隧道的动力学模型,将悬浮隧道简化为等距离弹性支撑梁,通过Galerkin(伽辽金)法求解悬浮隧道的振动位移方程,数值模拟悬浮隧道跨中时程响应,分析张力腿竖向刚度、冲击物质量、冲击速度对悬浮隧道跨中位移的影响.结果表明:冲击荷载作用下,张力腿竖向刚度对悬浮隧道位移响应的影响显著,但具有极限性.其次,冲击物质量和冲击速度也会显著影响悬浮隧道的跨中振动位移.研究结论为未来悬浮隧道的研究和建设提供重要的理论参考.The submerged floating tunnel （SFT） was simplified as an elastically supported beam with uniform supporting spacings. The dynamics model was established to solve the vibration problem of the SFT under impact loads. With the Galerkin method, the time-displacement responses at the central cross section of the SFT was numerically simulated. The influences of the anchor stiffness, the impact mass and the impact velocity on the SFT＇ s central displacement were analyzed. The present results indicate that the anchor stiffness has significant but bounded negative influence on the SFT＇ s central displacement. Moreover, the impact mass and the impact velocity have obvious positive effects on the SFT＇ s central displacement. The work provides a theoretical reference for further study and construction of the SFT.

关 键 词：水中悬浮隧道 冲击荷载 位移响应 参数设计 数值模拟 

分 类 号：U495.5[交通运输工程—交通运输规划与管理]