正方形顺排排列四圆柱流致振动响应研究

及春宁1,2,陈威霖1,徐万海1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (11) : 54-60.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (11) : 54-60.
论文

正方形顺排排列四圆柱流致振动响应研究

  • 及春宁1,2 ,陈威霖1,徐万海1
作者信息 +

INVESTIGATION ON THE RESPONSES OF FLOW-INDUCED VIBRATION OF FOUR SQUARE-ARRANGED CIRCULAR CYLINDERS

  • JI Chun-ning 1,2   CHEN Wei-lin 1  XU Wan-hai 1
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文章历史 +

摘要

对间距比 正方形顺排排列四圆柱流致振动进行了数值模拟研究,圆柱仅横流向振动,雷诺数为 ,折合流速为 。研究发现,上游两圆柱的响应与单圆柱涡激振动相似,呈现出明显的初始分支和下端分支。上游两圆柱的振幅均在折合流速 时达到最大值 ,与单圆柱涡激振动最大振幅 相近。下游两圆柱的振幅在折合流速 时达到最大值 ,比单圆柱涡激振动最大振幅增大了74.8%。正方形顺排排列四圆柱流致振动响应中出现了三个不对称区间,分别为第一不对称区间 、第二不对称区间 和第三不对称区间 。圆柱不对称的振动响应特性和圆柱间隙流稳定偏斜有关。

Abstract

Flow-induced vibration of four square-arranged circular cylinders with a center-to-center spacing ratio of   and zero attack angle is numerically investigated. The vibration is constrained in cross-flow direction, the reduced velocity is in the range of   and the Reynolds number is  . Results show that the responses of two upstream cylinders are similar to those of VIV of an isolated cylinder, in which the initial and lower branches are clearly observed. The upstream two cylinders obtain their maximum vibration amplitude of   at the reduced velocity  , which is close to that of an isolated cylinder  . The two downstream cylinders obtain their maximum amplitude   at the reduced velocity  , which is 74.8% larger than that of an isolated cylinder. Three asymmetric vibration regions are observed, i.e., the first asymmetric vibration region  , the second asymmetric vibration region   and the third asymmetric vibration region  . The asymmetric vibrating pattern of the cylinders are closely related with the asymmetric wake patterns and the stably biased gap flow.

关键词

流致振动 / 正方形排列 / 圆柱 / 振动响应

Key words

Flow-induced vibration / square arrangement / circular cylinder / vibration response

引用本文

导出引用
及春宁1,2,陈威霖1,徐万海1. 正方形顺排排列四圆柱流致振动响应研究[J]. 振动与冲击, 2016, 35(11): 54-60
JI Chun-ning 1,2 CHEN Wei-lin 1 XU Wan-hai 1. INVESTIGATION ON THE RESPONSES OF FLOW-INDUCED VIBRATION OF FOUR SQUARE-ARRANGED CIRCULAR CYLINDERS[J]. Journal of Vibration and Shock, 2016, 35(11): 54-60

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