水中悬浮隧道合理支撑间距分析  

Analysis the submerged floating tunnel’s reasonable support length

作　　者：秦银刚[1] 周生国 周晓军[1] 

机构地区：[1]西南交通大学土木学院,成都610031 [2]重庆市江北嘴中央商务区开发投资有限公司,重庆400024

出　　处：《水动力学研究与进展（A辑）》2008年第3期309-313,共5页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(10572121);教育部霍英东基金资助项目(94024)。

摘　　要：当悬浮隧道穿越水道较宽时,需要在两岸之间设置支撑系统。支撑系统设置是否合理直接关系到悬浮隧道的稳定性和修建成本。为得出合理的支撑间距,本文从悬浮隧道稳定性角度出发,将两支撑之间悬浮隧道管段简化成简支梁,采用线性化流体-结构相互作用力,在涡激作用下考虑振动时结构的非线性建立控制方程。采用Melnikov方法进行稳定性分析,以系统出现混沌为系统稳定控制条件,在假定其它条件不变的情况下得到以悬浮隧道支撑间距为控制变量的稳定性判据。It is necessary to set support system between the banks to make the SFT stability when the crossing water area is broad enough. Whether the support system has been set reasonably or not is not only relating to the structure’s stability but also concerning to the building cost. To acquire the reasonable support length,it began with the view of SFT’s stability in the article. It took the SFT structure as simply supported Euler-Bernoulli beam and supposed the force which has generated for the fluid and structure interacted is linearity. And with thinking of the structural nonlinearity under the effect of the vibration induced by vortex shedding,the control equation was built. Melnikov method was used to analysis the stability. It took generating chaotic behavior as the SFT system stability control condition. Supposed other conditions are unchanged,one can obtain the stability criterion,in which the length between the two supports is the control parameter.

关 键 词：支撑 悬浮隧道 涡激 MELNIKOV方法 混沌 判据 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]