中文摘要：

采用ANSYS／CFX软件分别进行绕流和流固耦合情况下圆柱群数值模拟。基于数值模拟结果，研究了顺流向排列圆柱尾流干涉效应、横向排列的圆柱边界效应，以及流固耦合效应对升阻力系数的影响。研究表明，尾流作用使顺流向排列圆柱群涡激升力和脉动拖曳力结果大于单圆柱结果，边界流作用使横流向排列圆柱群涡激升力和脉动拖曳力结果同样大于单柱结果，并且涡激升力之间产生的相位差最大为180°；流固耦合作用对两种排列方式的圆柱体群涡激升力和脉动拖曳力都有增强作用；尾流作用和边界作用对圆柱群无因次位移都有增强作用。

英文摘要：

In the situation of streaming and fluid-solid interaction, numerical simulation was carried out by ANSYS/CFX. According to the numerical results, wake interference effects of the downstream cylinder, boundary effects of the transverse cylin- der and fluid-structure interaction impact to lift and drag coefficient were studied. The results showed that wake interference effects of the downstream cylinder made lift force and fluctuating drag force greater than single cylinder results. Boundary effects of the transverse cylinder made lift force and fluctuating drag results larger than that of single cylinder, and the maximum phase difference was 180 degree. Lift force and fluctuating drag force of two kinds of cylinder were enhanced due to vortex-induced mo- tion effect. Non-dimensional amplitude was enhanced due to wake interference effects and boundary effects.