Cristin-resultat-ID: 1635364
Sist endret: 13. mai 2019, 09:56
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

Stochastic bivariate time series models of waves in the North Sea and their application in simulation-based design

Bidragsytere:
  • Endre Sandvik
  • Ole Johan Jørgensen Lønnum og
  • Bjørn Egil Asbjørnslett

Tidsskrift

Applied Ocean Research
ISSN 0141-1187
e-ISSN 1879-1549
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2018
Trykket: 2019
Volum: 82
Sider: 283 - 295
Open Access

Importkilder

Scopus-ID: 2-s2.0-85056880893

Beskrivelse Beskrivelse

Tittel

Stochastic bivariate time series models of waves in the North Sea and their application in simulation-based design

Sammendrag

In this paper, we present and evaluate three long-term wave models for application in simulation-based design of ships and marine structures. Designers and researchers often rely on historical weather data as a source for ocean area characteristics based on hindcast datasets or in-situ measurements. The limited access and size of historical datasets reduces repeatability of simulations and analyses, making it difficult to assess the sampling variability of performance and loads on marine vessels and structures. Markov, VAR and VARMA wave models, producing independent long-term time series of significant wave height (Hs) and spectral peak period (Tp), is presented as possible solutions to this problem. The models are tested and compared by addressing how the models affect interpretation of design concepts and the ability to replicate statistical and physical characteristics of the wave process. Our results show that the VAR and VARMA models perform sufficiently in describing design perfor- mance, but does not capture the physical process fully. The Markov model is found to perform worst of the tested models in the applied tests, especially for measures covering several consecutive sea states.

Bidragsytere

Endre Sandvik

  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet

Ole Johan Jørgensen Lønnum

  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet

Bjørn Egil Asbjørnslett

  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet
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