Approach to include load sequence effects in the design of an offshore wind turbine substructure

R.C. Dragt, D. Allaix, J. Maljaars, J.T. Tuitman, Y. Salman, M.E. Otheguy

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)
1 Downloads (Pure)

Abstract

Fatigue is one of the main design drivers for offshore wind substructures. Using Fracture Mechanics methods, load sequence effects such as crack growth retardation due to large load peaks can be included in the fatigue damage estimation. Due to the sequence dependency, a method is required that represents the sequences of loads in the design or maintenance procedures. This paper presents a methodology to deal with this challenge. First, a framework is presented for coupling between the design load cases and the Fracture Mechanics methods, resulting into the requirements for loads and load sequences. Second, a 2-stage Markov Chain Monte Carlo model is presented which is able to create realistic loading sequences based on measurement data. The method is elaborated for fluctuating wind loads.

Original languageEnglish
Title of host publicationProceedings of the 27th International Ocean and Polar Engineering Conference, ISOPE 2017
Pages312-319
Number of pages8
ISBN (Electronic)9781880653975
Publication statusPublished - 2017
Event27th International Ocean and Polar Engineering Conference (ISOPE-2017), June 25-30, 2017, San Francisco, USA - San Francisco, United States
Duration: 25 Jun 201730 Jun 2017

Conference

Conference27th International Ocean and Polar Engineering Conference (ISOPE-2017), June 25-30, 2017, San Francisco, USA
Abbreviated titleISOPE 2017
CountryUnited States
CitySan Francisco
Period25/06/1730/06/17

Keywords

  • Fatigue
  • Fatigue design guidelines
  • Load sequences
  • Markov Chain Monte Carlo
  • Offshore Wind

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