悬浮隧道锚索涡激振动影响因素分析

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 Stress Model)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。

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

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.