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Mooring System Stiffness: A General Analytical Formulation With an Application to Floating Offshore Wind Turbines

[+] Author Affiliations
Celso P. Pesce, Giovanni A. Amaral, Guilherme R. Franzini

University of São Paulo, São Paulo, Brazil

Paper No. IOWTC2018-1040, pp. V001T01A021; 12 pages
doi:10.1115/IOWTC2018-1040
From:
  • ASME 2018 1st International Offshore Wind Technical Conference
  • ASME 2018 1st International Offshore Wind Technical Conference
  • San Francisco, California, USA, November 4–7, 2018
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5197-5
  • Copyright © 2018 by ASME

abstract

Using classic approaches of analytical mechanics, this paper addresses the general problem and provides an analytic and explicit formulation for the stiffness matrix of a generic mooring system layout. This is done around a generic offset position and heading of the floating unit, given the curves of tension vs displacement for each mooring line, for a frictionless seabed. The international benchmark of the Offshore Code Comparison Collaboration Continuation – OC4 is taken as a case study. The use of the analytical formulation is exemplified by systematically varying the mean offset position and heading of the platform, as well as the pretensioning of the mooring system.

Copyright © 2018 by ASME

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