Experimental investigations were conducted on a flexible riser with and without helical strakes. A uniform current was obtained by towing a riser model in a tank, and the vortex-induced vibration (VIV) suppression of strakes with different heights and pitches was studied. The results of the bare riser show that the characteristics of the synchronization of the VIV for a flexible riser have many orders, and the excited mode jumps from one to another abruptly. During the high order synchronization regime, the VIV response decreases with the increased order of the synchronization. The experimental results also indicate that the response characteristics of a bare riser can be quite distinct from those of a riser with helical strakes, and the suppression performance depends on the geometry of the helical strakes. The fatigue damage in the CF direction is of the same order as that in the IL direction for the bare riser. However, for the riser fitted with helical strakes, the fatigue damage in the CF direction is much smaller than that in the IL direction. The experimental results also confirmed that strake height has a greater influence on the VIV response than the strake pitch, and the drag exerted on the riser increases with strake pitch and height.
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ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
June 8–13, 2014
San Francisco, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4540-0
PROCEEDINGS PAPER
Experimental Investigation on the Suppression Device of VIV of a Flexible Riser
Yun Gao,
Yun Gao
Shanghai Jiao Tong University, Shanghai, China
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Shixiao Fu,
Shixiao Fu
Shanghai Jiao Tong University, Shanghai, China
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Leijian Song,
Leijian Song
Shanghai Jiao Tong University, Shanghai, China
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Tao Peng,
Tao Peng
Shanghai Jiao Tong University, Shanghai, China
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Runpei Lei
Runpei Lei
Shanghai Jiao Tong University, Shanghai, China
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Yun Gao
Shanghai Jiao Tong University, Shanghai, China
Shixiao Fu
Shanghai Jiao Tong University, Shanghai, China
Leijian Song
Shanghai Jiao Tong University, Shanghai, China
Tao Peng
Shanghai Jiao Tong University, Shanghai, China
Runpei Lei
Shanghai Jiao Tong University, Shanghai, China
Paper No:
OMAE2014-23427, V002T08A026; 17 pages
Published Online:
October 1, 2014
Citation
Gao, Y, Fu, S, Song, L, Peng, T, & Lei, R. "Experimental Investigation on the Suppression Device of VIV of a Flexible Riser." Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: CFD and VIV. San Francisco, California, USA. June 8–13, 2014. V002T08A026. ASME. https://doi.org/10.1115/OMAE2014-23427
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