剪切来流下柔性圆柱体涡激振动响应试验研究

高云1, 2, 付世晓2,熊友明1, 杨家栋1, 王盟浩1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 142-148.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 142-148.
论文

剪切来流下柔性圆柱体涡激振动响应试验研究

  • 高云1, 2, 付世晓2 , 熊友明1, 杨家栋1, 王盟浩1
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Experimental study on vortex induced vibration response of a flexible cylinder in sheared current

  • Gao Yun1,2, Fu Shi-xiao2, Xiong You-ming1, Yang Jia-dong1, Wang Meng-hao1
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摘要

应用模型试验的方法,深入地研究了柔性圆柱体在剪切来流下的涡激振动响应。试验过程中通过旋转臂架从而形成相对剪切来流。通过测试得到的应变数据,基于模态叠加法得到圆柱体的涡激振动位移响应。研究结果表明:当折合速度较小时,响应频率会全程参加涡激振动;随着折合速度的上升,响应频率则会间歇性地参加涡激振动。涡激振动响应在横流方向仅存在一个锁定区域,而在顺流方向则存在两个锁定区域,其中第一个锁定区域与横流方向吻合。

Abstract

The vortex induced vibration responses of a flexible cylinder in sheared current were studied experimentally. The relative sheared currents were simulated by rotating the cantilever during the experiment. Based on the modal analysis method, the displacement responses can be obtained by the measured strain. The results indicate that the response frequency participates the vibration all the time at low reduced velocity. However, at high reduced velocity, response frequency participates the vibration intermittently. Vortex induced vibration response has only one lock-in region in CF direction, but two lock-in regions in IL direction. The first lock-in region in the IL direction coincides with the lock-in region in CF direction.

关键词

剪切来流 / 柔性圆柱体 / 涡激振动 / 驻波 / 行波 / 锁定区域

Key words

sheared current / flexible cylinder / vortex induced vibration / standing wave / travelling wave / lock-in region

引用本文

导出引用
高云1, 2, 付世晓2,熊友明1, 杨家栋1, 王盟浩1. 剪切来流下柔性圆柱体涡激振动响应试验研究[J]. 振动与冲击, 2016, 35(20): 142-148
Gao Yun1,2, Fu Shi-xiao2, Xiong You-ming1, Yang Jia-dong1, Wang Meng-hao1. Experimental study on vortex induced vibration response of a flexible cylinder in sheared current[J]. Journal of Vibration and Shock, 2016, 35(20): 142-148

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