Articles | Volume 7, issue 5
https://doi.org/10.5194/wes-7-1919-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-7-1919-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Probabilistic temporal extrapolation of fatigue damage of offshore wind turbine substructures based on strain measurements
Clemens Hübler
CORRESPONDING AUTHOR
Institute of Structural Analysis, Leibniz University Hannover/ForWind, Appelstr. 9a, 30167 Hanover, Germany
Raimund Rolfes
Institute of Structural Analysis, Leibniz University Hannover/ForWind, Appelstr. 9a, 30167 Hanover, Germany
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Franziska Schmidt, Clemens Hübler, and Raimund Rolfes
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2025-83, https://doi.org/10.5194/wes-2025-83, 2025
Preprint under review for WES
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In this work, for the first time, a Kriging meta-model is detailed analysed to replace the simulation model of an idling offshore wind turbine. It becomes clear that the findings regarding meta-modelling of the idling wind turbine are generally similar to the findings regarding meta-modelling of the same wind turbine in operation. Only for the approximation of the rotor blade root bending moments, two additional input parameters have to be included compared to the same wind turbine in operation.
Clemens Jonscher, Paula Helming, David Märtins, Andreas Fischer, David Bonilla, Benedikt Hofmeister, Tanja Grießmann, and Raimund Rolfes
Wind Energ. Sci., 10, 193–205, https://doi.org/10.5194/wes-10-193-2025, https://doi.org/10.5194/wes-10-193-2025, 2025
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This study investigates dynamic displacement estimation using double-time-integrated acceleration signals for future application in load monitoring based on accelerometers. To estimate displacements without amplitude distortion, a tilt error compensation method for low-frequency vibrations of tower structures using the static bending line without the need for additional sensors is presented. The method is validated using a full-scale onshore wind turbine tower and a terrestrial laser scanner.
Susanne Könecke, Jasmin Hörmeyer, Tobias Bohne, and Raimund Rolfes
Wind Energ. Sci., 8, 639–659, https://doi.org/10.5194/wes-8-639-2023, https://doi.org/10.5194/wes-8-639-2023, 2023
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Extensive measurements in the area of wind turbines were performed in order to validate a sound propagation model. The measurements were carried out under various environmental conditions and included the acquisition of acoustical, meteorological and wind turbine performance data. By processing and analysing the measurement data, validation cases and input parameters for the propagation model were derived. Comparing measured and modelled propagation losses, generally good agreement is observed.
Clemens Jonscher, Benedikt Hofmeister, Tanja Grießmann, and Raimund Rolfes
Wind Energ. Sci., 7, 1053–1067, https://doi.org/10.5194/wes-7-1053-2022, https://doi.org/10.5194/wes-7-1053-2022, 2022
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This work presents a method to use low-noise IEPE sensors in the low-frequency range down to 0.05 Hz. In order to achieve phase and amplitude accuracy with this type of sensor in the low-frequency range, a new calibration procedure for this frequency range was developed. The calibration enables the use of the low-noise IEPE sensors for large structures, such as wind turbines. The calibrated sensors can be used for wind turbine monitoring, such as fatigue monitoring.
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Short summary
Offshore wind turbines are beginning to reach their design lifetimes. Hence, lifetime extensions are becoming relevant. To make well-founded decisions on possible lifetime extensions, fatigue damage predictions are required. Measurement-based assessments instead of simulation-based analyses have rarely been conducted so far, since data are limited. Therefore, this work focuses on the temporal extrapolation of measurement data. It is shown that fatigue damage can be extrapolated accurately.
Offshore wind turbines are beginning to reach their design lifetimes. Hence, lifetime extensions...
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