Optimal Structural Reliability of Offshore Wind Turbines

John Dalsgaard Sørensen, N.J. Tarp-Johansen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

The main failure modes of modern large wind turbines are fatigue failure of wings, hub, shaft and main tower, local buckling of main tower, and failure of the foundation. This paper considers reliability-based optimal design of wind turbines. Compared to onshore wind turbines and building structures, humans spent little time in the vicinity of offshore wind turbines and the probability of human injury during storm conditions is small. Further environmental pollution will also in general be small in case of failure. One could therefore argue that the reliability level of offshore wind turbines can be lower than for onshore wind turbines and other civil engineering structures and can be assessed by reliability-based cost-optimization. Specifically this paper considers the main tower and foundation. Both fatigue and ultimate strength failure modes are included. Different formulations of the objective function are considered.
Original languageEnglish
Title of host publicationSafety and Reliability of Engineering Systems and Structures : Proceedings of the 9th International Conference on Structural Safety and Reliability
EditorsG. Augusti, G.I. Schuëller, M. Ciampoli
Number of pages8
Place of PublicationHolland
PublisherMillpress
Publication date2005
Pages1423-1430
ISBN (Electronic)90 5966 040 4
Publication statusPublished - 2005
Event9th International Conference on Structural Safety and Reliability, ICOSSAR 2005 - Rom, Italy
Duration: 19 Jun 200523 Jun 2005

Conference

Conference9th International Conference on Structural Safety and Reliability, ICOSSAR 2005
Country/TerritoryItaly
CityRom
Period19/06/200523/06/2005

Bibliographical note

Published on cd

Keywords

  • Offshore Wind Turbines
  • Reliability Analysis
  • Reliability-Based Optimization
  • Reliability Level

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