On the influence of rotor nacelle assembly modelling on the computed eigenfrequencies of offshore wind turbines

Tim Reinhardt; Carlos Sastre Jurado; Wout Weijtjens; Christof Devriendt

doi:10.1088/1742-6596/2767/5/052034

On the influence of rotor nacelle assembly modelling on the computed eigenfrequencies of offshore wind turbines

Tim Reinhardt, Carlos Sastre Jurado, Wout Weijtjens, Christof Devriendt

Research output: Contribution to journal › Conference paper

Abstract

Motivated by the mismatch of measured and computed eigenfrequencies for the second tower mode of offshore wind turbines as well as previous studies
examining the influence of including flexible blades in structural models, the need to extend the current integrated model to include flexible blades became apparent. A basic modelling approach which takes the blades as beam elements was implemented in an in-house finite element model of offshore wind turbines and benchmarked for the NREL 5 MW reference turbine with OpenFast. Moreover, the modelling approach was benchmarked with measurements that were obtained during the installation of a Belgian offshore wind turbine. The inclusion of flexible blades is shown to have a significant influence on the second tower mode and is able to reduce the mismatch between measurements and computations. Furthermore, the capability of the inclusion of flexible blades to model the effects of additional parameters is presented. Overall, the need to extend the rotor nacelle modelling in structural models of offshore wind turbines beyond a lumped mass approach is demonstrated.

Original language	English
Article number	052034
Number of pages	10
Journal	Journal of Physics: Conference Series
Volume	2767
Issue number	5
DOIs	https://doi.org/10.1088/1742-6596/2767/5/052034
Publication status	Published - 2024
Event	TORQUE 2024 - Florence, Italy Duration: 29 May 2024 → 31 May 2024 https://www.torque2024.eu/

Bibliographical note

Funding Information:
The authors would like to acknowledge the support of the Belgian Ministry of Economic Affairs through the ETF project WINDSOIL. The support of VLAIO through the De Blauwe Cluster SBO SOILTWIN project is also acknowledged. Furthermore, the authors gratefully acknowledge Parkwind NV for their permission to use the monitoring data.

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

Keywords

structural modelling
digital twin
rna modelling
offshore wind turbines

Access to Document

10.1088/1742-6596/2767/5/052034Licence: CC BY

VLADBC9: FIRMEST - Fast and reliable prognostic tools for fatigue (re)assessment of OWT substructures for new and existing wind farms
Weijtjens, W. & Devriendt, C.
1/01/24 → 31/12/26
Project: Applied

Cite this

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title = "On the influence of rotor nacelle assembly modelling on the computed eigenfrequencies of offshore wind turbines",

abstract = "Motivated by the mismatch of measured and computed eigenfrequencies for the second tower mode of offshore wind turbines as well as previous studies examining the influence of including flexible blades in structural models, the need to extend the current integrated model to include flexible blades became apparent. A basic modelling approach which takes the blades as beam elements was implemented in an in-house finite element model of offshore wind turbines and benchmarked for the NREL 5 MW reference turbine with OpenFast. Moreover, the modelling approach was benchmarked with measurements that were obtained during the installation of a Belgian offshore wind turbine. The inclusion of flexible blades is shown to have a significant influence on the second tower mode and is able to reduce the mismatch between measurements and computations. Furthermore, the capability of the inclusion of flexible blades to model the effects of additional parameters is presented. Overall, the need to extend the rotor nacelle modelling in structural models of offshore wind turbines beyond a lumped mass approach is demonstrated.",

keywords = "structural modelling, digital twin, rna modelling, offshore wind turbines",

author = "Tim Reinhardt and {Sastre Jurado}, Carlos and Wout Weijtjens and Christof Devriendt",

note = "Funding Information: The authors would like to acknowledge the support of the Belgian Ministry of Economic Affairs through the ETF project WINDSOIL. The support of VLAIO through the De Blauwe Cluster SBO SOILTWIN project is also acknowledged. Furthermore, the authors gratefully acknowledge Parkwind NV for their permission to use the monitoring data. Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; TORQUE 2024 ; Conference date: 29-05-2024 Through 31-05-2024",

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doi = "10.1088/1742-6596/2767/5/052034",

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T1 - On the influence of rotor nacelle assembly modelling on the computed eigenfrequencies of offshore wind turbines

AU - Reinhardt, Tim

AU - Sastre Jurado, Carlos

AU - Weijtjens, Wout

AU - Devriendt, Christof

N1 - Funding Information: The authors would like to acknowledge the support of the Belgian Ministry of Economic Affairs through the ETF project WINDSOIL. The support of VLAIO through the De Blauwe Cluster SBO SOILTWIN project is also acknowledged. Furthermore, the authors gratefully acknowledge Parkwind NV for their permission to use the monitoring data. Publisher Copyright: © Published under licence by IOP Publishing Ltd.

PY - 2024

Y1 - 2024

N2 - Motivated by the mismatch of measured and computed eigenfrequencies for the second tower mode of offshore wind turbines as well as previous studies examining the influence of including flexible blades in structural models, the need to extend the current integrated model to include flexible blades became apparent. A basic modelling approach which takes the blades as beam elements was implemented in an in-house finite element model of offshore wind turbines and benchmarked for the NREL 5 MW reference turbine with OpenFast. Moreover, the modelling approach was benchmarked with measurements that were obtained during the installation of a Belgian offshore wind turbine. The inclusion of flexible blades is shown to have a significant influence on the second tower mode and is able to reduce the mismatch between measurements and computations. Furthermore, the capability of the inclusion of flexible blades to model the effects of additional parameters is presented. Overall, the need to extend the rotor nacelle modelling in structural models of offshore wind turbines beyond a lumped mass approach is demonstrated.

AB - Motivated by the mismatch of measured and computed eigenfrequencies for the second tower mode of offshore wind turbines as well as previous studies examining the influence of including flexible blades in structural models, the need to extend the current integrated model to include flexible blades became apparent. A basic modelling approach which takes the blades as beam elements was implemented in an in-house finite element model of offshore wind turbines and benchmarked for the NREL 5 MW reference turbine with OpenFast. Moreover, the modelling approach was benchmarked with measurements that were obtained during the installation of a Belgian offshore wind turbine. The inclusion of flexible blades is shown to have a significant influence on the second tower mode and is able to reduce the mismatch between measurements and computations. Furthermore, the capability of the inclusion of flexible blades to model the effects of additional parameters is presented. Overall, the need to extend the rotor nacelle modelling in structural models of offshore wind turbines beyond a lumped mass approach is demonstrated.

KW - structural modelling

KW - digital twin

KW - rna modelling

KW - offshore wind turbines

U2 - 10.1088/1742-6596/2767/5/052034

DO - 10.1088/1742-6596/2767/5/052034

M3 - Conference paper

VL - 2767

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 5

M1 - 052034

T2 - TORQUE 2024

Y2 - 29 May 2024 through 31 May 2024

ER -

On the influence of rotor nacelle assembly modelling on the computed eigenfrequencies of offshore wind turbines

Abstract

Bibliographical note

Keywords

Access to Document

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Projects

VLADBC9: FIRMEST - Fast and reliable prognostic tools for fatigue (re)assessment of OWT substructures for new and existing wind farms

Cite this