为研究浮式圆柱体在均匀流下涡激运动响应,对其进行了水槽模型实验研究。测试了约化速度自1.3至10.2范围内的有、无螺旋侧板圆柱的运动响应,从响应幅值、涡泄频率等多个角度出发,分析了其涡激运动的关键特征。研究表明:裸圆柱在约化速度5.5至8之间发生锁定现象,增加螺旋侧板后抑制涡激运动效果显著,且无明显锁定现象;流固耦合作用下,涡激运动横荡频率不再符合斯托哈尔频率变化规律。
Abstract
In order to study vortex induced motions (VIM) response of a floating cylinder, its model tests were performed in a water flume under the reduced velocity range of 1.3 to 10.2. Considering the aspects of response amplitude and vortex shedding frequency, VIM responses of the cylinder with and without helical strakes were measured. It was shown that for the cylinder without helical strakes, “lock in” phenomena occur under the reduced velocity range of 5.5 to 8; after adding to the cylinder helical strakes to the cylinder, the effect of suppressing VIM is obvious and the phenomena of “lock in” are not obvious; under fluid-structure interaction, the VIM sway frequency of the cylinder is on longer coincident with the varying law of Strouhal frequency.
关键词
浮式圆柱 /
涡激运动 /
模型实验 /
流固耦合
{{custom_keyword}} /
Key words
floating cylinder /
vortex induced motions /
model test /
fluid-structure interaction
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 周阳,黄维平. 大直径浮式结构涡激振动的数值模拟[J]. 中国海洋大学学报,2014,44(9):098-103.
ZHOU Yang, HUANG Wei-ping. Numerical Simulation of the Vortex-induced Motion of Spar Platform Considering the Coupling Effect[J], Periodical of Ocean University of China, 2014,44(9):098-103.
[2] Mehernosh I, Steve P, Jonathan B, et al. Vortex Induced Motions of the Horn Mountain Truss Spar[C]. Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE, 2008:967-973.
[3] Van Dijk R, Magee A, Perryman S, et al. Model test experience on Vortex Induced Vibrations of Truss Spars[C]. Offshore Technology Conference, OTC, 2003:15242.
[4] Van Dijk R, Fourchy P, Voogt A, et al. The effect of mooring system and sheared currents on vortex induced motions of truss Spars[C]. Proceedings of the 22nd International Conference on Offshore Mechanics and Arctic Engineering, OMAE, 2003:285-292.
[5] Halkyard J, Sirnivas S, Holmes S, et al. Benchmarking of truss spar vortex induced motions derived from CFD with experiments[C]. Proceedings of the 24th International Conference on Off shore Mechanics and Arctic Engineering, OMAE, 2005:895-902.
[6] Bybee K. Spar vortex-induced-vibration prediction[J], JPT, Journal of Petroleum Technology, 2005, 57(2):61-62+80.
[7] Atluri S, Halkyard J, Sirnivas S. CFD simulation of Truss Spar Vortex-Induced Motion[C]. Proceedings of the 25th International Conference on Offshore Mechanics and Arctic Engineering, OMAE, 2006: 787-793.
[8] 周阳. 考虑辐射阻尼的Spar平台涡激运动分析方法研究[D]. 青岛:中国海洋大学,2015.
ZHOU Yang. Research on the Analysis Method of Vortex Induced Motion of Spar Platform Considering Radiation Damping[D]. Qingdao: Ocean University of China, 2015.
[9] 曹淑刚,黄维平,顾恩凯. 考虑流固耦合的弹性圆柱体涡激振动研究[J]. 振动与冲击,2015,34(1):55-62.
CAO Shu-gang, HUANG Wei-ping, GU En-kai. Vortex-induced vibration of an elastic cylinder considering fluid-structure interaction[J]. Journal of vibration and shock, 2015,34(1):55-62.
[10] 王颖. Spar 平台涡激运动关键特性研究[D]. 上海: 上海交通大学, 2010.
WANG Ying. Research on the Key Characteristics of Spar Vortex-induced Motions[D]. Shanghai: Shanghai Jiao Tong University, 2010.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}