悬浮隧道锚索涡激振动影响因素分析  

Parametric Analysis of the Cable's Vortex-Induced Vibration of Submerged Floating Tunnel

作　　者：罗刚[1] 周晓军[1] 王爽[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《土木建筑与环境工程》2013年第3期51-56,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(10972186);中央高校基本科研业务专项基金(SWJTU11ZT33);教育部创新团队发展计划(IRT0955)

摘　　要：将锚索运动简化为弹簧质量阻尼系统,锚索周围流场采用RSM(Reynolds StressModel)结合增强的壁面函数模型计算,利用四阶Runge-Kutta法计算锚索振动方程,并将程序写入FLUENT软件进行流固耦合分析。讨论了锚索质量比、阻尼比、是否考虑流向运动和来流速度对锚索涡激振动的影响,主要结论有:质量比对锚索横向涡激振动幅值影响很小,对约化速度范围影响较大;阻尼比对约化速度范围影响很小,对锚索涡激振动幅值影响较大;在低质量比的情况下,考虑锚索流向运动时,涡激振动幅值比不考虑时偏大。The cable＇s motion was modeled by a spring-mass-damper system. The flow field was calculated by RSM combined with the enhanced wall function model and the vibration equation of the cable was solved by the Four Step Runge-Kutta Algorithm, which was written into FLUENT software to be analyzed. It was adopted to analyse the factors influencing vortex-induced vibration of submerged floating tunnel cable, such as mass ratio, damping ratio of the cable and whether to consider streamline movement. The main conclusion included： mass ratio has little influence on the transverse vortex induced vibration amplitude of the cable, but has a big influence on the region of the reduced velocity; damping ratio almost has little influence on the region of the reduced velocity of cable＇s viv, but has an influence on the cable＇s vibration amplitude significantly; In the case of low-mass ratio, considered the impact of the cable streamline movement, the transverse vortex-induced vibration amplitude is bigger than not considered the case.

关 键 词：悬浮隧道锚索 涡激振动 数值模拟 动网格 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]