Articles | Volume 3, issue 1
https://doi.org/10.5194/wes-3-163-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/wes-3-163-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Apr 2018
Research article |
| 03 Apr 2018
| 03 Apr 2018
Benefits of subcomponent over full-scale blade testing elaborated on a trailing-edge bond line design validation
Malo Rosemeier
CORRESPONDING AUTHOR
Division Structural Components, Fraunhofer IWES, Fraunhofer Institute for Wind Energy Systems, Am Seedeich 45, 27572 Bremerhaven, Germany
Gregor Basters
Division Structural Components, Fraunhofer IWES, Fraunhofer Institute for Wind Energy Systems, Am Seedeich 45, 27572 Bremerhaven, Germany
Alexandros Antoniou
Division Structural Components, Fraunhofer IWES, Fraunhofer Institute for Wind Energy Systems, Am Seedeich 45, 27572 Bremerhaven, Germany
Related authors
Matthias Saathoff, Malo Rosemeier, Thorsten Kleinselbeck, and Bente Rathmann
Wind Energ. Sci., 6, 1079–1087, https://doi.org/10.5194/wes-6-1079-2021, https://doi.org/10.5194/wes-6-1079-2021, 2021
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Wind turbine blade misalignments were measured. About 38 % of the turbines measured have been operating outside the accepted misalignment range. This research quantifies the effect of the measured misalignment on the turbine lifetime by means of simulations. The lifetimes of the main frame at the tower top and the tower base were affected most by a blade misalignment. To avoid a lifetime reduction, blade misalignments should be identified and corrected as early as possible during the lifetime.
Malo Rosemeier and Matthias Saathoff
Wind Energ. Sci., 5, 897–909, https://doi.org/10.5194/wes-5-897-2020, https://doi.org/10.5194/wes-5-897-2020, 2020
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A huge number of wind turbines have reached their designated lifetime of 20 years.
Most of the turbines installed were overdesigned.
In practice, these turbines could potentially operate longer to increase the energy yield.
For the use case turbine considered in this work, a simple lifetime extension of 8.7 years increases the energy yield by 43.5 %. When the swept rotor area is increased by means of a blade tip extension, the yield is increased by an additional 2.3 %.
Matthias Saathoff, Malo Rosemeier, Thorsten Kleinselbeck, and Bente Rathmann
Wind Energ. Sci., 6, 1079–1087, https://doi.org/10.5194/wes-6-1079-2021, https://doi.org/10.5194/wes-6-1079-2021, 2021
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Wind turbine blade misalignments were measured. About 38 % of the turbines measured have been operating outside the accepted misalignment range. This research quantifies the effect of the measured misalignment on the turbine lifetime by means of simulations. The lifetimes of the main frame at the tower top and the tower base were affected most by a blade misalignment. To avoid a lifetime reduction, blade misalignments should be identified and corrected as early as possible during the lifetime.
Malo Rosemeier and Matthias Saathoff
Wind Energ. Sci., 5, 897–909, https://doi.org/10.5194/wes-5-897-2020, https://doi.org/10.5194/wes-5-897-2020, 2020
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Short summary
A huge number of wind turbines have reached their designated lifetime of 20 years.
Most of the turbines installed were overdesigned.
In practice, these turbines could potentially operate longer to increase the energy yield.
For the use case turbine considered in this work, a simple lifetime extension of 8.7 years increases the energy yield by 43.5 %. When the swept rotor area is increased by means of a blade tip extension, the yield is increased by an additional 2.3 %.
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Emmanuel Branlard and Jens Geisler
Wind Energ. Sci., 7, 2351–2371, https://doi.org/10.5194/wes-7-2351-2022, https://doi.org/10.5194/wes-7-2351-2022, 2022
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The article presents a framework to obtain the linear and nonlinear equations of motion of a multibody system including rigid and flexible bodies. The method yields compact symbolic equations of motion. The applications are many, such as time-domain simulation, stability analyses, frequency domain analyses, advanced controller design, state observers, and digital twins.
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The seismic soil–structure interaction of wind turbine support structures is investigated. Wind turbine support structures are modelled as a non-classically damped system, and its seismic loadings are analytically derived by the response spectrum method. To improve the prediction accuracy of the shear force on the footing, a threshold for the allowable modal damping ratio is proposed. The proposed method is capable of effectively estimating seismic loadings on the tower and footing.
Pablo Noever-Castelos, David Melcher, and Claudio Balzani
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In the wind energy industry, a digital twin is fast becoming a key instrument for the monitoring of a wind turbine blade's life cycle. Here, our introduced model updating with invertible neural networks provides an efficient and powerful technique to represent the real blade as built. This method is applied to a full finite element Timoshenko beam model of a blade to successfully update material and layup parameters. The advantage over state-of-the-art methods is the established inverse model.
Pablo Noever-Castelos, Bernd Haller, and Claudio Balzani
Wind Energ. Sci., 7, 105–127, https://doi.org/10.5194/wes-7-105-2022, https://doi.org/10.5194/wes-7-105-2022, 2022
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Modern rotor blade designs depend on detailed numerical models and simulations. Thus, a validated modeling methodology is fundamental for reliable designs. This paper briefly presents a modeling algorithm for rotor blades, its validation against real-life full-scale blade tests, and the respective test data. The hybrid 3D shell/solid finite-element model is successfully validated against the conducted classical bending tests in flapwise and lead–lag direction as well as novel torsion tests.
Peyman Amirafshari, Feargal Brennan, and Athanasios Kolios
Wind Energ. Sci., 6, 677–699, https://doi.org/10.5194/wes-6-677-2021, https://doi.org/10.5194/wes-6-677-2021, 2021
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One particular problem with structures operating in seas is the so-called fatigue phenomenon. Cyclic loads imposed by waves and winds can cause structural failure after a number of cycles. Traditional methods have some limitations.
This paper presents a developed design framework based on fracture mechanics for offshore wind turbine support structures which enables design engineers to maximise the use of available inspection capabilities and optimise the design and inspection, simultaneously.
James Stirling, Edward Hart, and Abbas Kazemi Amiri
Wind Energ. Sci., 6, 15–31, https://doi.org/10.5194/wes-6-15-2021, https://doi.org/10.5194/wes-6-15-2021, 2021
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This paper considers the modelling of wind turbine main bearings using analytical models. The validity of simplified analytical representations is explored by comparing main-bearing force reactions with those obtained from higher-fidelity 3D finite-element models. Results indicate that good agreement can be achieved between the analytical and 3D models in the case of both non-moment-reacting (such as for a spherical roller bearing) and moment-reacting (such as a tapered roller bearing) set-ups.
William Finnegan, Priya Dasan Keeryadath, Rónán Ó Coistealbha, Tomas Flanagan, Michael Flanagan, and Jamie Goggins
Wind Energ. Sci., 5, 1567–1577, https://doi.org/10.5194/wes-5-1567-2020, https://doi.org/10.5194/wes-5-1567-2020, 2020
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Leading edge erosion is an ever-existing damage issue on wind turbine blades. This paper presents the numerical finite element analysis model for incorporating a new leading edge protection component for offshore applications, which is manufactured from thermoplastic polyurethane, into wind turbine blade designs. The model has been validated against experimental trials at demonstrator level, comparing the deflection and strains during testing, and then applied to a full-scale wind turbine blade.
Can Muyan and Demirkan Coker
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Wind turbine blade prototypes undergo structural tests before they are used in the field so that any design failure can be detected prior to their operation. In this study, strength characteristics of a small-scale existing 5 m composite wind turbine blade is carried out utilizing the finite-element-method software package Ansys. The results show that the blade exhibits sufficient resistance against buckling. Yet, laminate failure is found to play a major role in the ultimate blade failure.
Sven Störtenbecker, Peter Dalhoff, Mukunda Tamang, and Rudolf Anselm
Wind Energ. Sci., 5, 1121–1128, https://doi.org/10.5194/wes-5-1121-2020, https://doi.org/10.5194/wes-5-1121-2020, 2020
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Multi-rotor wind turbine systems show the potential to reduce the levelized cost of energy. In this study a simplified and fast method as a first venture to find an optimal number of rotors and design parameters is presented. A variety of space frame designs are dimensioned based on ultimate loads and buckling, as a preliminary step for later detailed analyses.
Giovanni Migliaccio, Giuseppe Ruta, Stefano Bennati, and Riccardo Barsotti
Wind Energ. Sci., 5, 685–698, https://doi.org/10.5194/wes-5-685-2020, https://doi.org/10.5194/wes-5-685-2020, 2020
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This work addresses the mechanical modelling of complex beamlike structures, which may be curved, twisted and tapered in their reference state and undergo large displacements, 3D cross-sectional warping and small strains. A model suitable for the problem at hand is proposed. It can be used to analyze large deflections under prescribed loads and determine the stress and strain fields in the structure. Analytical and numerical results obtained by applying the proposed modelling approach are shown.
David Melcher, Moritz Bätge, and Sebastian Neßlinger
Wind Energ. Sci., 5, 675–684, https://doi.org/10.5194/wes-5-675-2020, https://doi.org/10.5194/wes-5-675-2020, 2020
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When a new rotor blade is designed, a prototype needs to be qualified by testing in two separate directions before it can be used in the field. These tests are time-consuming and expensive. Combining these two tests into one by applying loads in two directions simultaneously is a possible method to reduce time and costs. This paper presents a new computational method, which is capable of designing these complex tests and shows exemplarily that the combined test is faster than traditional tests.
Ozan Gözcü and David R. Verelst
Wind Energ. Sci., 5, 503–517, https://doi.org/10.5194/wes-5-503-2020, https://doi.org/10.5194/wes-5-503-2020, 2020
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Geometrically nonlinear blade modeling effects on the turbine loads and computation time are investigated in an aero-elastic code based on multibody formulation. A large number of fatigue load cases are used in the study. The results show that the nonlinearities become prominent for large and flexible blades. It is possible to run nonlinear models without significant increase in computational time compared to the linear model by changing the matrix solver type from dense to sparse.
Edward Hart, Benjamin Clarke, Gary Nicholas, Abbas Kazemi Amiri, James Stirling, James Carroll, Rob Dwyer-Joyce, Alasdair McDonald, and Hui Long
Wind Energ. Sci., 5, 105–124, https://doi.org/10.5194/wes-5-105-2020, https://doi.org/10.5194/wes-5-105-2020, 2020
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This paper presents a review of existing theory and practice relating to main bearings for wind turbines. Topics covered include wind conditions and resulting rotor loads, main-bearing models, damage mechanisms and fault detection procedures.
Evgueni Stanoev and Sudhanva Kusuma Chandrashekhara
Wind Energ. Sci., 4, 57–69, https://doi.org/10.5194/wes-4-57-2019, https://doi.org/10.5194/wes-4-57-2019, 2019
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In the frame of a multi-body simulation of a wind turbine, the lowest rotor blade eigenmodes are used to describe their elastic deformations. In this paper, a finite Timoshenko beam element is proposed based on the transfer matrix method. The element stiffness and mass matrices are derived by numerical integration of the differential equations of motion. A numerical example with generic rotor blade data demonstrates the performance of the method in comparison with FAST/ADAMS software results.
Dominik Traphan, Iván Herráez, Peter Meinlschmidt, Friedrich Schlüter, Joachim Peinke, and Gerd Gülker
Wind Energ. Sci., 3, 639–650, https://doi.org/10.5194/wes-3-639-2018, https://doi.org/10.5194/wes-3-639-2018, 2018
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Wind turbines are exposed to harsh weather, leading to surface defects on rotor blades emerging from the first day of operation. Defects
grow quickly and affect the performance of wind turbines. Thus, there is demand for an easily applicable remote-inspection method that is sensitive to small
surface defects. In this work we show that infrared thermography can meet these requirements by visualizing differences in the surface temperature
of the rotor blades downstream of surface defects.
Jake D. Nunemaker, Michael M. Voth, David A. Miller, Daniel D. Samborsky, Paul Murdy, and Douglas S. Cairns
Wind Energ. Sci., 3, 427–438, https://doi.org/10.5194/wes-3-427-2018, https://doi.org/10.5194/wes-3-427-2018, 2018
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This paper presents an experimental investigation of the tensile strength of fiberglass–epoxy composites before and after water saturation. The strengths of [0], [90], and [0/90] layups all show a drop in tensile strength. However, investigation of the data, damaged coupons, and acoustic emission events illustrates a change in the mechanism governing final failure between the dry and saturated coupons. This illustrates the complexity of strength prediction of multiple layups after saturation.
Matthias Stammler, Fabian Schwack, Norbert Bader, Andreas Reuter, and Gerhard Poll
Wind Energ. Sci., 3, 97–105, https://doi.org/10.5194/wes-3-97-2018, https://doi.org/10.5194/wes-3-97-2018, 2018
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Modern wind turbines all share the ability to turn (pitch) the blades around their main axis. By pitching the blades, the aerodynamic forces created by the blades are controlled. Rolling bearings, consisting of two steel rings and balls that roll on raceways between them, are used to allow pitching. To design pitch drives, it is necessary to know the losses within the bearings. This article describes how such losses have been measured and compares them with calculation models.
Jared W. Nelson, Trey W. Riddle, and Douglas S. Cairns
Wind Energ. Sci., 2, 641–652, https://doi.org/10.5194/wes-2-641-2017, https://doi.org/10.5194/wes-2-641-2017, 2017
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Given the rapid growth and large scale of wind turbines, it is important that wind farms achieve maximum availability by reducing downtime due to maintenance and failures. The Blade Reliability Collaborative, led by Sandia National Laboratories and sponsored by the US DOE, was formed to address this issue. A comprehensive study to characterize and understand the manufacturing flaws common in blades, and their impact on blade life, was performed by measuring and testing commonly included defects.
Jared W. Nelson, Trey W. Riddle, and Douglas S. Cairns
Wind Energ. Sci., 2, 653–669, https://doi.org/10.5194/wes-2-653-2017, https://doi.org/10.5194/wes-2-653-2017, 2017
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The Blade Reliability Collaborative was formed to address wind turbine blade reliability. To better understand and predict these effects, various progressive damage modeling approaches, built upon the characterization previously addressed, were investigated. The results indicate that a combined continuum–discrete approach provides insight into reliability with known defects when used in conjunction with a probabilistic flaw framework.
Morten Hartvig Hansen
Wind Energ. Sci., 1, 271–296, https://doi.org/10.5194/wes-1-271-2016, https://doi.org/10.5194/wes-1-271-2016, 2016
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The modal dynamics of wind turbines are the fingerprints of their responses under the stochastic excitation from the wind field. Commercial wind turbines have typically three-bladed rotors, and their modal dynamics are well understood. Two-bladed turbines are still commercially less successful, and this work also shows that their modal dynamics are significantly more complex than that of turbines with three or more blades.
Cited articles
Antoniou, A., Branner, K., Lekou, D., Nuin, I., and Nijssen, R.: Methodology
for testing subcomponents; background and motivation for subcomponent testing
of wind turbine rotor blades, Tech. rep., Deliverable Number D7.1, Integrated
Research Programme on Wind Energy (IRPWind), 2015. a
Berring, P., Fedorov, V., Belloni, F., and Branner, K.: Advanced topics on
rotor blade full-scale structural fatigue testing and requirements, Tech.
rep., DTU Wind Energy, 2014. a
Blasques, J. P.: Multi-material topology optimization of laminated composite
beams with eigenfrequency constraints, Compos. Struct., 111, 45–55,
2014. a
Blasques, J. and Bitsche, R.: An efficient and accurate method for computation
of energy release rates in beam structures with longitudinal cracks,
Eng. Fract. Mech., 133, 56–69, 2015. a
Blasques, J. P. and Stolpe, M.: Multi-material topology optimization of
laminated composite beam cross sections, Compos. Struct., 94,
3278–3289, 2012. a
Blasques, J., Bitsche, R., Fedorov, V., and Lazarov, B.: Accuracy of an
efficient framework for structural analysis of wind turbine blades, Wind
Energy, 19, 1603–1621, 2016. a
Bosschers, J.: Modelling of rotational effects with a 2-D viscous-inviscid
interaction code, NLR Contract Report CR, 96521, 1996. a
Branner, K., Eder, M., Berring, P., Belloni, F., Toft, H., Sørensen, J.,
Corre, A., Lindby, T., Quispitupa, A., and Petersen, T.: Experimental Blade
Research - phase 2, Tech. rep., DTU Wind Energy, Denmark, 2015. a
Branner, K., Berring, P., and Haselbach, P.: Subcomponent testing of trailing
edge panels in wind turbine blades, in: Proceedings of 17th European
Conference on Composite Materials, 26–30 June 2016, Munich, Germany, 2016. a
Drela, M.: Xfoil: An analysis and design system for low reynolds number
airfoilsii, University of Notre Dame, 1989. a
Eder, M. A. and Bitsche, R.: A qualitative analytical investigation of
geometrically nonlinear effects in wind turbine blade cross sections,
Thin Wall. Struct., 93, 1–9, 2015. a
Eder, M. A., Belloni, F., Tesauro, A., and Hanis, T.: A multi-frequency fatigue
testing method for wind turbine rotor blades, J. Sound Vib.,
388, 123–140, 2017. a
Freebury, G. and Musial, W.: Determining equivalent damage loading for
full-scale wind turbine blade fatigue tests, in: 2000 ASME Wind Energy
Symposium, 10–13 January 2000, Reno, NV, USA, 287–296, https://doi.org/10.2514/6.2000-50, 2000. a
GL: Guideline for the Certification of Wind Turbines, Germanischer Lloyd
Industrial Services, Hamburg, Germany, 2010. a
Greaves, P. R., Dominy, R. G., Ingram, G. L., Long, H., and Court, R.:
Evaluation of dual-axis fatigue testing of large wind turbine blades,
P. I. Mech. Eng. C-J. Mec., 226, 1693–1704, 2012. a
Haselbach, P. U., Eder, M. A., and Belloni, F.: A comprehensive investigation
of trailing edge damage in a wind turbine rotor blade, Wind Energy, 19,
1871–1888, https://doi.org/10.1002/we.1956, 2016. a
Heijdra, J., Borst, M., and Van Delft, D.: Wind turbine blade structural
performance testing, in: Advances in Wind Turbine Blade Design and materials, Woodhead Publishing, Sawston, Cambridge, UK, https://doi.org/10.1533/9780857097286.3.432,
432–445, 2013. a, b
IEC: IEC 61400-5 – Wind Energy Generation Systems - Part 5: Wind Turbine
Blades (draft in RevU), International Electrotechnical Commission, Geneva, Switzerland, 2017. a
Krimmer, A., Leifheit, R., and Bardenhagen, A.: Assessment of quasi-static and
fatigue performance of uni-directionally fibre reinforced polymers on the
basis of matrix effort, 6th EASN International Conference on
Innovation in European Aeronautics Research, Porto, Portugal, 18–21 October
2016. a, b
Kühlmeier, L.: Buckling of wind turbine rotor blades – Analysis, design and
experimental validation, PhD thesis, Aalborg University, Denmark, 2006. a
Lahuerta, F., de Ruiter, M. J., Espinosa, L., Koorn, N., and Smissaert, D.:
Assessment of wind turbine blade trailing edge failure with sub-component
tests, in: Proceedings of 21st International Conference on Composite
Materials, 20–25 August 2017, Xi'an, Shaanxi, China, 2017. a
Lee, H. G. and Park, J.-S.: Optimization of resonance-type fatigue testing for
a full-scale wind turbine blade, Wind Energy, 19, 371–380, 2016. a
Miner, M. A.: Cumulative damage in fatigue, J. Appl. Mech., 12,
A159–A164, 1945. a
Nielsen, M., Jensen, F., Nielsen, P., Berring, P., Martyniuk, K., Roczek, A.,
Sieradzan, T., Roudnitski, V., Kucio, P., Bitsche, R., Andresen, P.,
Lukassen, T., Andrlová, Z., Branner, K., Bak, C., Kallesøe, B., McGugan,
M., Wedel-Heinen, J., Lindby, T., Sørensen, F., Jensen, C., Knudsen, H.,
Uldahl, U., Rasmussen, A., and Rasmussen, J.: Full Scale Test of SSP 34 m
blade, edgewise loading LTT: Data Report 1, Tech. rep., Danmarks Tekniske
Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. a
Ning, S. A.: A simple solution method for the blade element momentum equations
with guaranteed convergence, Wind Energy, 17, 1327–1345,
https://doi.org/10.1002/we.1636, 2014. a
Palmgren, A.: Die Lebensdauer von Kugellagern, Zeitschrift des Vereins
Deutscher Ingenieure, 68, 339–341, 1924. a
Post, N.: Fatigue Test Design: Scenarios for Biaxial Fatigue Testing of a
60-Meter Wind Turbine Blade, Tech. rep., National Renewable Energy
Laboratory, Golden, CO, USA, https://doi.org/10.2172/1271941, 2016. a, b
Puck, A.: Festigkeitsanalyse von Faser-Matrix-Laminaten: Modelle für die
Praxis, Hanser, Munich, Germany, 1996. a
Roczek-Sieradzan, A., Nielsen, M., Branner, K., Jensen, F., and Bitsche, R.:
Wind turbine blade testing under combined loading, in: Proc. of 32nd Risø
International Symposium on Materials Science, 5–9 September 2011, Roskilde, Denmark, 32, 449–456, 2011. a
Rosemeier, M., Basters, G., and Antoniou, A.: Repository of WESC2017 paper data –
Benefits of subcomponent testing over full- scale blade testing elaborated on a trailing-edge bond
line design [Data set], Zenodo, https://doi.org/10.5281/zenodo.1208135, 2018.
Snowberg, D., Dana, S., Hughes, S., and Berling, P.: Implementation of a
Biaxial Resonant Fatigue Test Method on a Large Wind Turbine Blade, Tech.
rep., National Renewable Energy Laboratory, National Renewable Energy Laboratory, Golden, CO, USA, https://doi.org/10.2172/1155105, 2014. a
Sutherland, H.: On the Fatigue Analysis of Wind Turbines, Tech. rep., Sandia
National Laboratories, Albuquerque, NM, USA, https://doi.org/10.1.1.31.7908, 1999. a
Sutherland, H. and Mandell, J.: Optimised Goodman diagram for the analysis of
fiberglass composites used in wind turbine blades, in: A Collection of the
2005 ASME Wind Energy Symposium: Technical Papers Presented at the 43rd AIAA
Aerospace Sciences Meeting and Exhibit, Reno, Nevada 10, 18–27, 2005. a
Swanson, J. A.: ANSYS Mechanical APDL, version 15.0, 2014. a
White, D.: New method for dual-axis fatigue testing of large wind turbine
blades using resonance excitation and spectral loading, Tech. rep., National
Renewable Energy Lab., Golden, CO, USA, 2004. a
White, D., Musial, W., and Engberg, S.: Evaluation of the new B-REX fatigue
testing system for multi-megawatt wind turbine blades, in: Proceeding,
ASME/AIAA Wind Energy Symposium, Reno, NV, 2005. a
White, D., Desmond, M., Gowharji, W., Beckwith, J. A., and Meierjurgen, K.:
Development of a dual-axis phase-locked resonant excitation test method for
fatigue testing of wind turbine blades, in: ASME 2011 International
Mechanical Engineering Congress & Exposition, 2011. a
Zahle, F., Réthoré, P.-E., Graf, P., Dykes, K., and Ning, A.:
FUSED-Wind v0.1.0 (Version v0.1.0), Zenodo, https://doi.org/10.5281/zenodo.13899, 2015. a
Short summary
This research was conducted with the help of computer models to give argumentation on how the reliability of wind turbine rotor blade structures can be increased using subcomponent testing (SCT) as a supplement to full-scale blade testing (FST). It was found that the use of SCT can significantly reduce the testing time compared to FST while replicating more realistic loading conditions for an outboard blade segment as it occurs in the field.
This research was conducted with the help of computer models to give argumentation on how the...
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