Approach to include load sequence effects in the design of an offshore wind turbine substructure
conference paper
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.
TNO Identifier
776654
Publisher
International Society of Offshore and Polar Engineers (ISOPE)
Source title
Proceedings of the Twenty-Seventh International Ocean and Polar Engineering Conference, San Francisco, CA, USA, June 25-30 2017
Pages
1-8
Files
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