Print Email Facebook Twitter Approach to include load sequence effects in the design of an offshore wind turbine substructure Title Approach to include load sequence effects in the design of an offshore wind turbine substructure Author Dragt, R.C. Allaix, D.L. Maljaars, J. Tuitman, J.T. Salman, Y. Otheguy, M.E. Publication year 2017 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. Subject 2015 Fluid & Solid MechanicsSD - Structural Dynamics SR - Structural ReliabilityTS - Technical SciencesMaritime & OffshoreMarineEnergyOffshore windFatigueLoad sequencesMarkov Chain Monte CarloFatigue design guidelines To reference this document use: http://resolver.tudelft.nl/uuid:cca7ec4c-97ff-495d-9e63-c50495ebf10e TNO identifier 776654 Publisher International Society of Offshore and Polar Engineers (ISOPE) Source Proceedings of the Twenty-Seventh International Ocean and Polar Engineering Conference, San Francisco, CA, USA, June 25-30 2017, 1-8 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.