The influence of fully nonlinear wave forces on aero-hydro-elastic calculations of monopile wind turbines

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Abstract

The response of an offshore wind turbine tower and its monopile foundation has been investigated when exposed to linear and fully nonlinear irregular waves on four different water depths. The investigation focuses on the consequences of including full nonlinearity in the wave kinematics. The linear and nonlinear irregular wave realizations are calculated using the fully nonlinear potential flow wave model OceanWave3D [1]. The linear and nonlinear wave realizations are compared using both a static analysis on a fixed monopile and dynamic calculations with the aeroelastic code Flex5 [2]. The conclusion from this analysis is that linear wave theory is generally sufficient for estimating the fatigue loading, but wave nonlinearity is important in determining the ultimate design loads.
Original languageEnglish
JournalMarine Structures
Volume50
Pages (from-to)162-188
ISSN0951-8339
DOIs
Publication statusPublished - 2016

Keywords

  • Aeroelastic calculations
  • Irregular waves
  • Monopile
  • Wave nonlinearity
  • Wind turbine

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