并列刚性双圆柱流激振动风洞实验研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (9) : 197-204.

论文

并列刚性双圆柱流激振动风洞实验研究

胡中明1,2,王嘉松2,孙远坤2,郑瀚旭2

作者信息 +

Wind tunnel test study on flow-induced vibration of parallel dual-rigid cylinder

HU Zhongming1,2, WANG Jiasong2, SUN Yuankun2, ZHENG Hanxu2

Author information +

文章历史 +

摘要

通过风洞实验研究了弹性支撑条件下并列刚性双圆柱的流激振动，实验雷诺数范围Re = 3200-36200。圆柱间距比S/D = 1.5-4.0，其中S为两圆柱圆心间距，D为圆柱直径。结果表明：随着间距的变化，并列双圆柱的振动幅值呈现两种模式：涡激振动(Vortex-induced vibration, VIV)和尾流耦合涡激振动(Wake-coupled vortex-induced vibration, WCVIV)。WCVIV发生在间距比S/D ≤ 3.0时，此时双圆柱之间相互干涉作用较强，双圆柱振动幅值响应呈现不一致性，振动位移之间表现为同相位或反相位耦合特征，圆柱尾流场对称点的涡脱频率也不相同，尾流呈现不对称性。而VIV发生在间距比S/D = 3.5-4.0时，此时双圆柱相互独立，其振动幅值和涡脱频率几乎相同，尾流的不对称现象消失，振动位移之间相位差不再近似等于恒定值而是随时间周期性的“划动”。无论发生WCVIV还是VIV，振动频率的主频均锁定于1倍的固有频率。

Abstract

Flow-induced vibrations of a side-by-side arrangement of two rigid cylinders which are elastically mounted have been investigated in a wind tunnel at Re = 3200-36200. The spacing ratios S/D are from 1.5 to 4.0, where S is the center-to-center spacing and D is the cylinder diameter. With the change of S/D, two patterns of the vibration amplitudes can be classified: Vortex-induced vibration (VIV) and Wake-coupled vortex-induced vibration (WCVIV). WCVIV is occurred at S/D ≤ 3.0 and there exists strong interference between the two cylinders. The vibrations amplitude responses of the two cylinders are inconsistent which show the in-phase or antiphase characteristics. Meanwhile, the vortex frequency responses at the symmetry points behind the cylinders are also different. While, VIV takes place when S/D = 4.0. At this time, the two cylinders are independent and the vibration amplitude and vortex frequency responses behind the cylinders are nearly the same, which indicates that the asymmetry of the wake is disappear. The phase angle ‘slips’ periodically instead of equal to a constant value. Additionally, the vibration frequency fo only can be locked to the natural frequency fn, whether the VIV or WCVIV response.

导出引用

胡中明1,2,王嘉松2,孙远坤2,郑瀚旭2. 并列刚性双圆柱流激振动风洞实验研究[J]. 振动与冲击, 2023, 42(9): 197-204

HU Zhongming1,2, WANG Jiasong2, SUN Yuankun2, ZHENG Hanxu2. Wind tunnel test study on flow-induced vibration of parallel dual-rigid cylinder[J]. Journal of Vibration and Shock, 2023, 42(9): 197-204

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