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Lifting Analysis of Subsea Framework Structures

[+] Author Affiliations
Tor E. Søfteland, Odd V. Skrunes

Subsea 7, Stavanger, Norway

Daniel Karunakaran

Subsea7, Stavanger, Norway

Paper No. OMAE2014-23816, pp. V01BT01A004; 10 pages
doi:10.1115/OMAE2014-23816
From:
  • ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1B: Offshore Technology
  • San Francisco, California, USA, June 8–13, 2014
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4538-7
  • Copyright © 2014 by ASME

abstract

Installation of subsea structures and equipment involves a lifting operation where the objects are exposed to large hydrodynamic forces when entering the oscillating sea-surface. During deployment, as the structure is lifted through the splash zone, snap forces due to slack or overload due to dynamic forces contribute to the maximum load experienced by the structure over the course of its design lifetime. This paper presents a method of how to verify the structural integrity of a subsea framework including determination of the maximum allowable sea-state in which the structure is safely installed. As well as describing an overall methodology for a subsea lifting analysis, hydrodynamic coefficients for cylinders in the splash zone is provided.

Copyright © 2014 by ASME

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