In this paper, an experimental study on the in-line and cross-flow vortex-induced vibration (VIV) of flexible cylinders is conducted. The relationship of two-degree-of-freedoms of vortex-induced vibration of flexible cylinders is also investigated. The influence of natural frequency of flexible cylinders on vortex shedding and VIV are studied through the experiment in this paper. Finally, A nonlinear model, with fluid-structure interaction, of two-degree-of-freedom VIV of flexible cylinders is proposed. It is shown that the ratio of the frequencies and amplitudes of in-line and cross flow VIV of the flexible cylinders changes with current velocity and Reynolds number. The natural frequency of flexible cylinder has great influence on the vortex-induced virbation due to the strong fluid-structure coupling effect. Under given current velocity, the natural frequency of flexible cylinder determines its forms of vibration (in circular or ‘8’ form). The ratio of the VIV frequencies is 1.0 beyond the lock in district and 2.0 within the lock in district respectively. And the ratio of the VIV amplitudes is 1.0 beyond the lock in district and 1/3 to 2/3 within the lock in district. The results from this paper indicates that in-line vibration should be considerated when calculating the vibration response and fatigue damage.
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ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2011
Rotterdam, The Netherlands
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4436-6
PROCEEDINGS PAPER
On Vortex Induced Vibration in Two-Degree-of-Freedoms of Flexible Cylinders
Weiping Huang,
Weiping Huang
Ocean University of China, Qingdao, Shandong, China
Search for other works by this author on:
Weihong Yu
Weihong Yu
Ocean University of China, Qingdao, Shandong, China
Search for other works by this author on:
Weiping Huang
Ocean University of China, Qingdao, Shandong, China
Weihong Yu
Ocean University of China, Qingdao, Shandong, China
Paper No:
OMAE2011-49698, pp. 591-596; 6 pages
Published Online:
October 31, 2011
Citation
Huang, W, & Yu, W. "On Vortex Induced Vibration in Two-Degree-of-Freedoms of Flexible Cylinders." Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Volume 4: Pipeline and Riser Technology. Rotterdam, The Netherlands. June 19–24, 2011. pp. 591-596. ASME. https://doi.org/10.1115/OMAE2011-49698
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