Comparison of Different Soil and Hydrodynamic Force Models on a 13.2MW Offshore Rotor

Luca Oggiano, Fabio Pierella, Jørgen Johansson, Ana M. Page

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The present work highlights differences between two soil models (the classical p-y curves and a FEM based super element model) and two hydrodynamic force models (the classical Morison approach and the more complex Rainey slender body force models). The paper highlights the differences between the models, focusing on the effect on the total fatigue experimented by the rotor on a reduced load matrix. A monopile for a 13.2 MW rotor was designed in the stiff-soft region and fully aero-servo-elastic simulations were run using the aero-servo-hydro-elastic tool 3DFloat. Results show conservative prediction of loads given by the PY curves, leading to a possible conservative design and increase of the overall amount of steel used. As for the hydrodynamic loads models, the Rainey and the Morison model gave identical results when provided with linear wave kinematics.
Original languageEnglish
Title of host publicationProceedings of the 29th International Ocean and Polar Engineering Conference 2019
Number of pages9
PublisherInternational Society of Offshore and Polar Engineers (ISOPE)
Publication date2019
Pages253-261
ISBN (Print)978-1 880653 85-2
Publication statusPublished - 2019
Event29th International Ocean and Polar Engineering Conference (ISOPE 2019) - Honolulu, United States
Duration: 16 Jun 201921 Jun 2019

Conference

Conference29th International Ocean and Polar Engineering Conference (ISOPE 2019)
CountryUnited States
CityHonolulu
Period16/06/201921/06/2019
SeriesProceedings of the International Offshore and Polar Engineering Conference
ISSN1098-6189

Keywords

  • large rotors
  • soil modeling
  • hydrodynamics

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