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

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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
Volume10
PublisherAmerican Society of Mechanical Engineers
Publication date2018
Article numberOMAE2018-77568
ISBN (Print)978-0-7918-5131-9
DOIs
Publication statusPublished - 2018
Event37th International Conference on Ocean, Offshore and Artic Engineering (OMAE2018) - Madrid, Spain
Duration: 17 Jun 201822 Jun 2018

Conference

Conference37th International Conference on Ocean, Offshore and Artic Engineering (OMAE2018)
CountrySpain
CityMadrid
Period17/06/201822/06/2018

Keywords

  • Ocean Engineering

Cite this

Conti, D., Natarajan, A., & Abrahamsen, A. B. (2018). Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines. In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering (Vol. 10). [OMAE2018-77568] American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2018-77568
Conti, Davide ; Natarajan, Anand ; Abrahamsen, Asger Bech. / Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines. ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Vol. 10 American Society of Mechanical Engineers, 2018.
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title = "Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines",
abstract = "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.",
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Conti, D, Natarajan, A & Abrahamsen, AB 2018, Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines. in ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. vol. 10, OMAE2018-77568, American Society of Mechanical Engineers, 37th International Conference on Ocean, Offshore and Artic Engineering (OMAE2018), Madrid, Spain, 17/06/2018. https://doi.org/10.1115/OMAE2018-77568

Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines. / Conti, Davide; Natarajan, Anand; Abrahamsen, Asger Bech.

ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Vol. 10 American Society of Mechanical Engineers, 2018. OMAE2018-77568.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines

AU - Conti, Davide

AU - Natarajan, Anand

AU - Abrahamsen, Asger Bech

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - Ocean Engineering

U2 - 10.1115/OMAE2018-77568

DO - 10.1115/OMAE2018-77568

M3 - Article in proceedings

SN - 978-0-7918-5131-9

VL - 10

BT - ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering

PB - American Society of Mechanical Engineers

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Conti D, Natarajan A, Abrahamsen AB. Influence of system level parameters on the fatigue life of jacket substructures for 10 MW and 20 MW wind turbines. In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Vol. 10. American Society of Mechanical Engineers. 2018. OMAE2018-77568 https://doi.org/10.1115/OMAE2018-77568