The vortex-induced vibration of flexible tandom cylinders with large aspect ratio and low mass ratio was studied by model tests and CFD numerical simulations.By analyzing the characteristics of the tandem cylinders such as amplitude, vibration frequency, force characteristics and flow field structure, the effects of flow velocity and distance between tandem cylinders on the vortex-induced vibration characteristics of downstream cylinder were investigated.It is found that the amplitudes of vortex-induced vibration of the upstream and downstream cylinders, are rather different and the dominant frequencies are also different when the velocity is greater than a certain value.Thus the concept of separate reduced velocity Ur was proposed.Both the velocity and spacing affect the effect of upstream wake on downstream cylinder.The velocity affects the strength and development of the upstream wake, and the spacing affects the development space of the upstream wake and the contact position between upstream wake and downstream cylinder.
宋虹，黄维平，付雪鹏. 基于模型试验和数值模拟的柔性串列圆柱体涡激振动研究[J]. 振动与冲击, 2020, 39(6): 64-73.
SONG Hong，HUANG Weiping，FU Xuepeng. Vortex induced vibration of flexible tandem cylinders based on model tests and numerical simulations. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(6): 64-73.
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