The roll damping of a FPSO assessment is a different subject than the ship case. The fact that the FPSO is not moving changes the flow hydrodynamics in such a way that the well established understanding is no longer applied. This is so at least for certain particularities such as flat bottom, no lift effect due to zero velocity, and so on. Recent researches have proven the strong effect of the vortex shedding on the roll damping of a FPSO mainly when large width bilge keel are present. Although these effects are known by a long time for ships, the increase of the vortex magnitude due the large width bilge keels on a FPSO has let to uncertainties about the behavior of the structures and the situation is challenging. It has been understood that the vortex can modify deeply the pressure distribution along the FPSO hull in such way that the final roll dissipation is higher. Surprisingly, under certain conditions the memory effects are small. The use of visualization techniques allied to the analysis of several decay tests for the same hull can help the understanding of several aspects such as the uncertainty in the measurements and the vortex behavior.
Skip Nav Destination
ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4488-5
PROCEEDINGS PAPER
The Influence of Vortex Formation on the Damping of FPSOs With Large Width Bilge Keels
Allan C. de Oliveira,
Allan C. de Oliveira
Petrobras R&D Center, Rio de Janeiro, RJ, Brazil
Search for other works by this author on:
Antonio Carlos Fernandes,
Antonio Carlos Fernandes
LOC/COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Search for other works by this author on:
Hélio Bailly Guimarães
Hélio Bailly Guimarães
LOC/COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Search for other works by this author on:
Allan C. de Oliveira
Petrobras R&D Center, Rio de Janeiro, RJ, Brazil
Antonio Carlos Fernandes
LOC/COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Hélio Bailly Guimarães
LOC/COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Paper No:
OMAE2012-83353, pp. 325-331; 7 pages
Published Online:
August 23, 2013
Citation
de Oliveira, AC, Fernandes, AC, & Guimarães, HB. "The Influence of Vortex Formation on the Damping of FPSOs With Large Width Bilge Keels." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 1: Offshore Technology. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 325-331. ASME. https://doi.org/10.1115/OMAE2012-83353
Download citation file:
7
Views
0
Citations
Related Proceedings Papers
Related Articles
Influence of Bilge Keel Width on the Roll Damping of FPSO
J. Offshore Mech. Arct. Eng (February,2010)
The Nonlinear Roll Damping of a FPSO Hull
J. Offshore Mech. Arct. Eng (February,2014)
Bilge-Keel Influence on Free Decay of Roll Motion of a Realistic Hull
J. Offshore Mech. Arct. Eng (August,2017)
Related Chapters
A Computational Framework for Antibiofouling System Design
Advances in Computers and Information in Engineering Research, Volume 2
Vortex-Induced Vibration
Flow Induced Vibration of Power and Process Plant Components: A Practical Workbook
Experimental Investigation of Ventilated Supercavitation Under Unsteady Conditions
Proceedings of the 10th International Symposium on Cavitation (CAV2018)