振荡来流频率对低雷诺数圆柱涡激振动的影响

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大连海事大学学报 ›› 2025, Vol. 51 ›› Issue (4) : 92-100.

于利辉¹，战庆亮^1*，陈一飞²，刘鑫³，张田¹，李鹏飞⁴

作者信息 +

Influence of oscillating inflow frequency on low Reynolds number cylindrical vortex induced vibration

YU Lihui¹， ZHAN Qingliang^1*，CHEN Yifei²，LIU Xin³，ZHANG Tian¹，LI Pengfei⁴

Author information +

文章历史 +

摘要

结构会受到非固定速度的来流作用，引起流致振动等问题。本文考虑非零均值的振荡来流，模拟了不同振荡频率下圆柱的涡激振动响应和绕流特征。使用流场模拟程序模拟了均匀流和高、低两种频率振荡来流叠加的工况，对比了不同来流条件下圆柱的位移响应、升阻力系数及涡场形态。结果表明：高频振荡来流下，圆柱振动响应与均匀来流条件下相似，位移幅值恒定且与升力系数同相位，涡脱落频率与结构频率接近；低频来流会导致结构位移时程呈现周期性的“增大-减小”现象，位移均方根值和峰值较均匀来流显著降低，且升力系数曲线与位移曲线存在反相位时段，抑制了结构振动。另外，振荡的来流会改变圆柱尾部的涡脱形态，导致流场结构与均匀流有较大区别。

Abstract

Oscillating flow can exert forces on structures immersed in it, resulting in flow-induced vibration and other problems. The vortex-induced vibration (VIV) of a circular cylinder in a non-zero mean oscillatory flow at different frequencies is simulated, and the characteristics of the vortex-excitation vibration response are investigated. Numerical simulations were conducted on the superposition of uniform flow and high- and low-frequency oscillating flows. The displacement response, lift-drag coefficient, and vortex field morphology of the cylinder were then compared under different flow conditions. The results show that under high-frequency oscillating flow conditions, the vibration response of the cylinder is similar to that under uniform flow conditions, with a constant displacement amplitude that is in phase with the lift coefficient, and a vortex shedding frequency close to the structural frequency. In contrast, low-frequency flow induces periodic "growth-decay" behavior in the displacement time history, significantly reducing the root-mean-square and peak displacement values compared to uniform flow. It is found that the lift coefficient exhibits an anti-phase relationship with displacement during certain intervals, effectively suppressing structural vibration. Additionally, the vortex shedding structure in the wake is affected by the oscillating incoming flow, resulting in a different flow pattern than that of uniform flow.

导出引用

于利辉, 战庆亮, 陈一飞, 刘鑫, 张田, 李鹏飞. 振荡来流频率对低雷诺数圆柱涡激振动的影响[J]. 大连海事大学学报. 2025, 51(4): 92-100

YU Lihui, ZHAN Qingliang, CHEN Yifei, LIU Xin, ZHANG Tian, LI Pengfei. Influence of oscillating inflow frequency on low Reynolds number cylindrical vortex induced vibration[J]. Journal of Dalian Maritime University. 2025, 51(4): 92-100

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