Effects of vortex excitation on the response of flexible risers
Conference
·
OSTI ID:194716
- Nippon Steel Corp., Tokyo (Japan). Civil Engineering and Marine Construction Div.
- Imperial Coll., London (United Kingdom). Dept. of Civil Engineering
A new approach to vortex shedding, incorporating lift forces by a quasi-steady model, is used to evaluate the effects of vortex excitation. The modeled lift forces are used directly as a part of the external forces in the equations of motion. The effects of the vortex excitation on the flexible riser are presented by comparing the results derived in analyses with and without lift forces. Lift forces produce small lateral vibrations of the riser, and cause larger displacements under current and wave loading because of the larger effective drag coefficient. Even though the vibration amplitudes are modest, the associated bending stresses are not insignificant in the context of fatigue.
- OSTI ID:
- 194716
- Report Number(s):
- CONF-950695-; ISBN 0-7918-1307-X; TRN: IM9611%%218
- Resource Relation:
- Conference: International conference on offshore mechanics and arctic engineering, Copenhagen (Denmark), 18-22 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of OMAE 1995 -- Proceedings of the 14. international conference on offshore mechanics and arctic engineering. Volume 1, Part B: Offshore technology; Chakrabarti, S.K. [ed.] [Chicago Bridge and Iron Technical Services, Plainfield, IL (United States)]; Gudmestad, O.T. [ed.] [Statoil, Stavanger (Norway)]; Sparks, C. [ed.] [Inst. Francais du Petrole, Rueil-Malmaison (France)]; Morrison, D.G. [ed.] [Shell E and P Technology Co., Houston, TX (United States)]; PB: 539 p.
- Country of Publication:
- United States
- Language:
- English
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