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Memorias de investigación
Communications at congresses:
InfIuence of wave induced second-order forces in semisubmersible fowt mooring design
Year:2013
Research Areas
  • Mechanical engineering,
  • Naval engineering
Information
Abstract
The main focus of this paper is on hydrodynamic modelling of a semisubmersible platform (which can support a 1.5MW wind turbine and is composed by three buoyant columns connected by bracings) with especial emphasis on the estimation of the wave drift components and their effects on the design of the mooring system. Indeed, with natural periods of drift around 60 seconds, accurate computation of the low-frequency second-order components is not a straightforward task. As methods usually adopted when dealing with the slow-drifts of deep-water moored systems, such as Newman?s approximation, have their errors increased by the relatively low resonant periods, and as the effects of depth cannot be ignored, the wave diffraction analysis must be based on full Quadratic Transfer Functions (QTF) computations. A discussion on the numerical aspects of performing such computations is presented, making use of the second-order module available with the seakeeping software WAMIT®. Finally, the paper also provides a preliminary verification of the accuracy of the numerical predictions based on the results obtained in a series of model tests with the structure fixed in bichromatic waves.
International
Si
Congress
32nd International Conference on Ocean, Offshore and Arctic Engineering (OMAE2013)
960
Place
Nantes, Francia
Reviewers
Si
ISBN/ISSN
978-0-7918-5542-3
Start Date
09/06/2013
End Date
14/06/2013
From page
1
To page
11
Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
Participants
  • Autor: Carlos Lopez Pavón (ACCIONA ENERGÍA)
  • Autor: Rafael Watai (Universidad de Sao Paulo)
  • Autor: Felipe Ruggeri (Universidad de Sao Paulo)
  • Autor: Alexandre N. Simos (Universidad de Sao Paulo)
  • Autor: Antonio Souto Iglesias (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Ciencias Aplicadas a la Ingeniería Naval
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