水下悬浮隧道动力响应数值分析

Numerical Analysis of Dynamic Response of Submerged Floating Tunnel

为确保悬浮隧道的安全稳定性能,对水下悬浮隧道周围流场的变化及流体对悬浮隧道的作用进行研究。基于Workbench软件中的FLUENT建立隧道所处的流体域,运用RNG k-ε湍流模型,以入流速度为变量,研究悬浮隧道在水中的受力情况,总结流场及悬浮隧道应力应变的变化规律。研究得出:入流速度对悬浮隧道的影响明显,管段的迎流面和背流面近壁区流速接近于0 m/s,流场内在管段上下侧形成的最大流速随入流速度的增大而增大;管段受到的应力是不均匀的,其最大变形也随入流速度的增大而增大。

In order to ensure the safety and stability of the floating tunnel,the change of the flow field around the submerged floating tunnel and the effect of the fluid on the suspension tunnel are studied in this paper.Firstly,it establishes the fluid domain of the tunnel based on FLUENT in the Workbench software.Then,it studies the stress of the floating tunnel in water with the inflow velocity as the variable by RNG k-εturbulence model.Finally,it summarizes the flow field and the change law of the stress and strain of the floating tunnel.The results show that the inflow velocity has an obvious effect on the floating tunnel,and the velocity near the wall of the upstream and downstream surfaces of the pipe section is close to0 m/s.The maximum velocity formed in the upper and lower sides of the pipe section in the flow field increases with the increase of the inflow velocity;the stress on the pipe section is uneven,and the maximum deformation also increases with the increase of the inflow velocity.