A model test of a free-hanging riser under vessel motion was performed in the ocean basin at Shanghai Jiao Tong University to confirm whether vortex-induced vibration (VIV) can happen due to pure vessel motion, to investigate the equivalent current velocity and Keulegan–Carpenter (KC) number effect on the VIV responses and to obtain the correlations for free-hanging riser VIV under vessel motion with VIV for other compliant risers. Top end of the riser was forced to oscillate at given vessel motion trajectories. Fiber Brag Grating (FBG) strain sensors were used to measure the riser dynamic responses. Experimental results confirmed that the free-hanging riser would experience significant out-of-plane VIV. Meanwhile, VIV responses in terms of response amplitude, response frequency and cross-section trajectories under different test cases were further compared and discussed. Most importantly, the correlation among VIV response frequency, vortex shedding pairs and maximum KC number KCmax was revealed. The presented work is supposed to provide useful references for gaining a better understanding on VIV induced by vessel motion, and for the development of future prediction models.
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ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2016
Busan, South Korea
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4993-4
PROCEEDINGS PAPER
Experimental Investigation on Vortex-Induced Vibration of a Free-Hanging Riser Under Vessel Motion
Jungao Wang,
Jungao Wang
Shanghai Jiao Tong University, Shanghai, China
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Shixiao Fu,
Shixiao Fu
Shanghai Jiao Tong University, Shanghai, China
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Muk Chen Ong,
Muk Chen Ong
University of Stavanger, Stavanger, Norway
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Huajun Li
Huajun Li
Ocean University of China, Qingdao, China
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Jungao Wang
Shanghai Jiao Tong University, Shanghai, China
Shixiao Fu
Shanghai Jiao Tong University, Shanghai, China
Muk Chen Ong
University of Stavanger, Stavanger, Norway
Huajun Li
Ocean University of China, Qingdao, China
Paper No:
OMAE2016-54617, V002T08A038; 18 pages
Published Online:
October 18, 2016
Citation
Wang, J, Fu, S, Ong, MC, & Li, H. "Experimental Investigation on Vortex-Induced Vibration of a Free-Hanging Riser Under Vessel Motion." Proceedings of the ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: CFD and VIV. Busan, South Korea. June 19–24, 2016. V002T08A038. ASME. https://doi.org/10.1115/OMAE2016-54617
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