Hydrodynamic interaction and clashing of two long flexible cylinders in uniform steady current have been studied. Model tests have been performed in the towing tank at Marintek in Trondheim. The riser models were free to move in vortex induced vibrations (VIV) and wake induced vibrations (WIO). The main objectives of the experimental campaign were to acquire high quality data that can be used to enhance the understanding of the mechanisms that drives riser clashing and to provide benchmark data for riser clashing code validation. Model tests were performed both for straked and naked risers, and for risers with and without bumper elements attached. Riser spacing, inflow angle, riser pretension and current velocity were systematically varied. The analysis of the recorded data has emphasized on assessing the spatial distribution of clashing, the relative impact velocities, WIO and VIV.
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ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
June 12–17, 2005
Halkidiki, Greece
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4195-2
PROCEEDINGS PAPER
Experimental Investigation of Dual Riser Interaction
Trygve Kristiansen,
Trygve Kristiansen
Marintek, Trondheim, Norway
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Kjell Herfjord
Kjell Herfjord
Norsk Hydro, Bergen, Norway
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Rolf Baarholm
Marintek, Trondheim, Norway
Trygve Kristiansen
Marintek, Trondheim, Norway
Halvor Lie
Marintek, Trondheim, Norway
Kjell Herfjord
Norsk Hydro, Bergen, Norway
Paper No:
OMAE2005-67100, pp. 221-229; 9 pages
Published Online:
November 11, 2008
Citation
Baarholm, R, Kristiansen, T, Lie, H, & Herfjord, K. "Experimental Investigation of Dual Riser Interaction." Proceedings of the ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B. Halkidiki, Greece. June 12–17, 2005. pp. 221-229. ASME. https://doi.org/10.1115/OMAE2005-67100
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