无变形网格下运动参考系求解平动流固耦合问题

发布时间：2018-03-06 07:00

  本文选题：运动参考系　切入点：涡激振动　出处：《振动与冲击》2017年06期 　论文类型：期刊论文

【摘要】：为模拟平动涡激振动,采用一种无变形网格的计算方法。通过运动参考系模拟整个求解域的运动,结合非结构网格下高精度算法,在NS方程中引入运动参考系引起的对流项及采用新的边界处理方式,通过构造合理的计算求解域,对低雷诺数下(Re=200)圆柱涡激振动进行了模拟,得到了圆柱涡激振动振幅以及详细流场结构,与实验结果和数值结果相比都得到了很好的一致性。并对不同阻尼比、频率比等参数进行研究,详细对比了不同振幅下尾流结构特征。结果证明了该计算方法是可行的、准确的。
[Abstract]:In order to simulate the translational vortex-induced vibration, a deformation-free mesh method is used to simulate the motion of the whole solution domain through the motion reference system. The flow term caused by the motion reference system is introduced into the NS equation and a new boundary treatment method is used to simulate the vortex induced vibration of a circular cylinder at low Reynolds number by constructing a reasonable computational solution domain. The vibration amplitude and the structure of the detailed flow field are obtained, which are in good agreement with the experimental and numerical results, and the parameters such as damping ratio and frequency ratio are studied. The characteristics of wake structure with different amplitudes are compared in detail. The results show that the proposed method is feasible and accurate.
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本文编号：1573781