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Vortex-Induced Vibrations of Long Marine Risers in Sheared Flows: DNS Studies

[+] Author Affiliations
Didier Lucor, X. Ma, G. E. Karniadakis

Brown University, Providence, RI

M. S. Triantafyllou

Massachusetts Institute of Technology, Cambridge, MA

Paper No. FEDSM2003-45241, pp. 2745-2750; 6 pages
doi:10.1115/FEDSM2003-45241
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

The offshore industry is moving to ever-increasing water depths, producing presently oil in depths of up to 2,500m, requiring detailed fatigue calculations for the risers and tendons used in the floating structures, see [1, 2]. Currents in the ocean are invariably highly sheared, hence the modes that can potentially be excited are many, see [3]. The calculation of how many and which modes are excited, can affect fatigue life very significantly, but there are no guidelines presently available for conducting this calculation.

Copyright © 2003 by ASME

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