圆柱体双自由度涡激振动轨迹的模型试验

康庄; 贾鲁生

doi:10.6052/0459-1879-12-120

圆柱体双自由度涡激振动轨迹的模型试验

doi: 10.6052/0459-1879-12-120

康庄^1, ,,
贾鲁生²

1.
哈尔滨工程大学船舶工程学院,哈尔滨 150001
2. 中海石油研究总院,北京 100027

基金项目: 国家自然科学基金(51009033)和中央高校基本科研业务费资助项目.

详细信息

通讯作者:
康庄

中图分类号: P756.2
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- 被引次数: 0
出版历程
- 收稿日期: 2012-05-04
- 修回日期: 2012-06-07
- 刊出日期: 2012-11-18

AN EXPERIMENT INVESTIGATION ON VIV TRAJECTORIES OF A TWO DEGREE FREE VIBRATION CYLINDER

Kang Zhuang^{1
, ,},
Jia Lusheng²

1.
College of Shipbuilding, Harbin Engineering University, Harbin 150001,China
2. CNOOC Research Center, Beijing 100027, China

Funds: The project was supported by the National Natural Science Foundation of China (51009033) and the Fundamental Research Funds for the Central Universities.

摘要

摘要: 对水平放置的直径 5cm,长120cm的圆柱体开展了双自由度涡激振动模型试验研究. 试验中发现,圆柱体在顺流向上的振动频率表现为"多频"的现象,即不光有2倍横向振动的频率,在某些振动固有频率和约化速度的条件下,还出现了单倍横向振动的频率,从而使圆柱体的轨迹呈现出"卵"形以及"雨滴"形等明显异于传统"8"字形与"新月"形的运动轨迹. 此外,通过研究初步得到了各种其他形式的振动轨迹向"8"字形变化的趋势,并认为不同的横向、顺流向振动固有频率以及流速是导致圆柱体涡激振动轨迹产生多种形式的主要原因.
- 双自由度涡激振动 /
- 轨迹 /
- “卵”形 /
- “雨滴”形
Abstract: The paper makes experimental studies on vortex induced vibration of a two degree free vibration cylinder. The cylinder is put horizontally, with the diameter of 5cm and the length of 120cm. The model test could change the frequency of the modeling system vibrating upwards cross and in-line flows by adjusting the number of springs in cross and in-line flows. It has been found the vibrating frequency of the cylinder in in-line flow appears to be "multi-frequency". Under certain vibration frequency and reduced velocity conditions, single-frequency exists in cross flow besides twice-frequency. Consequently, the new trajectories of "egg" and "rain drop" were shown in the tests, different from the traditional trajectories of figure "8" and "new moon", which"" was rarely mentioned in the studies of two degree-of-freedom vortex induced vibration of rigid cylinders with elastic support.
- VIV with two degree free vibration /
- trajectories /
- egg shape /
- rain drop shape

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