Effect of stiffness degradation of clay in the dynamic response of monopile-supported offshore wind turbines

K. A. Abhinav, Nilanjan Saha

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Stiffness degradation studies for monopile-supported offshore wind turbines (OWTs) are usually limited to the geotechnical domain, largely ignoring the dynamic loads from the wind and the waves. This paper makes use of a time-domain approach, coupling aerodynamic and hydrodynamic loads, to investigate the influence of stiffness degradation in clay on the response of a monopile-supported OWT in a water depth of 20 m. p-y curves are used to represent the soil–structure interaction (SSI) in the lateral direction and a suitable degradation method is applied to consider the effects of cyclic loading. It is observed that the influence of stiffness degradation wanes with increasing number of load cycles. OWT’s being highly dynamic structures; the debilitating effects of stiffness degradation cannot be entirely discounted.
Original languageEnglish
Title of host publicationGeotechnical Applications
EditorsI.V. Anirudhan, V.B. Maji
Place of PublicationCham, Switzerland
PublisherSpringer
Pages331-339
Number of pages9
ISBN (Print)9789811303678, 9789811303685
DOIs
Publication statusPublished - 13 Jun 2018

Publication series

NameLecture Notes in Civil Engineering
Volume13
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Keywords

  • offshore wind turbines
  • stiffness degradation
  • soil structure interaction

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