Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines

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This paper investigates the influence of system-level innovations on the fatigue life of jacket substructures for offshore wind turbines. The innovations consist of active control strategies as individual pitch control and individual flap control. Further the effect of a magnetic pseudo direct-drive generator (PDD) mounted upfront the rotor is investigated. Fully-coupled aeroelastic simulations are performed for 10 MW and 20 MW wind turbines, with the selected innovations, supported by jacket structures under specific met-ocean conditions at 50 m of water depth. Fatigue limit states at the jacket' welded joints are evaluated based on S-N curves and Miner's rule according to DNV-RP-C203 guideline. Results show the potential of advanced control systems to reduce stresses at jacket members. Few design challenges characterize PDD models, as increased tower base torsional loads and excitation of global bending modes may be critical for jacket's members. Altogether, this study indicates the benefit of an integrated-iterative design approach for jacket substructures, where system-level parameters are iterated along with the jacket design parameters using fully-coupled models.
Original languageEnglish
Title of host publicationASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
Number of pages10
PublisherAmerican Society of Mechanical Engineers
Publication date2018
Article numberOMAE2018-77568
ISBN (Print)978-0-7918-5131-9
Publication statusPublished - 2018
Event37th International Conference on Ocean, Offshore and Artic Engineering (OMAE2018) - Madrid, Spain
Duration: 17 Jun 201822 Jun 2018


Conference37th International Conference on Ocean, Offshore and Artic Engineering (OMAE2018)
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Ocean Engineering, Energy Engineering and Power Technology, Mechanical Engineering, Arctic engineering, Oceanography, Offshore oil well production, Offshore wind turbines, Welding, Advanced control systems, Aero-elastic simulations, Design parameters, Direct drive generators, Fatigue limit state, Fully-coupled model, Individual pitch control, Jacket structures, Fatigue of materials

ID: 160566285