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Experimental Investigation on Vortex-Induced Vibration of Risers With Staggered Buoyancy

[+] Author Affiliations
Lin Li, Shixiao Fu, Jianmin Yang, Tie Ren, Xuefeng Wang

Shanghai Jiao Tong University, Shanghai, China

Paper No. OMAE2011-49046, pp. 51-59; 9 pages
doi:10.1115/OMAE2011-49046
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 7: CFD and VIV; Offshore Geotechnics
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4439-7
  • Copyright © 2011 by ASME

abstract

In this paper, model tests of a riser with an aspect ratio of 263 were performed in a towing tank by towing the model with constant speeds. The riser was tested with various configurations of buoyancy, including 0% coverage, 25% coverage, 50% coverage and 100% coverage of the buoyancy modules. Furthermore, for the 25% and 50% coverage conditions, the portion without buoyancy modules of the model was covered with helical strakes of 17.5D/0.25D (pitch/height). In the experiments, the strain information in cross-flow (CF) direction was measured using Fiber Bragg Grating (FBG) sensors. The VIV characters of flexible risers with different buoyancy configurations were studied and compared with each other in detail.

Copyright © 2011 by ASME

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