Articles | Volume 2, issue 2
https://doi.org/10.5194/wes-2-361-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/wes-2-361-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
04 Jul 2017
Research article |
| 04 Jul 2017
Effect of foundation modelling on the fatigue lifetime of a monopile-based offshore wind turbine
Steffen Aasen
Institute for Energy Technology, P.O. Box 40, 2027 Kjeller, Norway
Ana M. Page
Norwegian Geotechnical Institute, Sognsveien 72, 0855 Oslo, Norway
Norwegian University of Science and Technology, Department of Civil
and Transport Engineering, Høgskoleringen 7A, 7491 Trondheim, Norway
Kristoffer Skjolden Skau
Norwegian Geotechnical Institute, Sognsveien 72, 0855 Oslo, Norway
Norwegian University of Science and Technology, Department of Civil
and Transport Engineering, Høgskoleringen 7A, 7491 Trondheim, Norway
Tor Anders Nygaard
CORRESPONDING AUTHOR
Institute for Energy Technology, P.O. Box 40, 2027 Kjeller, Norway
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Wind Energ. Sci., 8, 465–485, https://doi.org/10.5194/wes-8-465-2023, https://doi.org/10.5194/wes-8-465-2023, 2023
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This work examines if the motion experienced by an offshore floating wind turbine can significantly affect the rotor performance. It was observed that the system motion results in variations in the load, but these variations are not critical, and the current simulation tools capture the physics properly. Interestingly, variations in the rotor speed or the blade pitch angle can have a larger impact than the system motion itself.
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Romanas Puisa, Victor Bolbot, Andrew Newman, and Dracos Vassalos
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Anna-Maria Tilg, Charlotte Bay Hasager, Hans-Jürgen Kirtzel, and Poul Hummelshøj
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Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2019-101, https://doi.org/10.5194/wes-2019-101, 2020
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This paper addresses the topic of far-offshore wind energy exploitation. Far-offshore wind energy exploitation is not feasible with current technology because grid-connection cost, installation cost and O&M cost would be prohibitive. An enabling technology for far-offshore wind energy is the energy ship concept, which has been described, modelled and analyzed in a companion paper. This paper provides a cost model and cost estimates for an energy system based on the energy ship concept.
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Jakob Ilsted Bech, Charlotte Bay Hasager, and Christian Bak
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Rain erosion on wind turbine blades is a severe challenge for wind energy today. It causes significant losses in power production, and large sums are spent on inspection and repair.
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Sebastian Schafhirt and Michael Muskulus
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Wind Energ. Sci., 2, 469–476, https://doi.org/10.5194/wes-2-469-2017, https://doi.org/10.5194/wes-2-469-2017, 2017
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The first larger offshore wind farms are reaching a mature age. Operators have to take actions for monitoring now in order to have accurate knowledge on structural reserves later. This knowledge is important to make decisions on lifetime extension. Many offshore wind turbines have one set of strain gauges already installed at the transition piece. We present a simple and robust method to extrapolate these measurements to other locations of the monopile without need of additional instrumentation.
Antonio Jarquin Laguna
Wind Energ. Sci., 2, 387–402, https://doi.org/10.5194/wes-2-387-2017, https://doi.org/10.5194/wes-2-387-2017, 2017
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This paper presents the idea of centralized electricity production in a wind farm by means of water technology. A new way of generating and transmitting wind energy is explored with no intermediate electrical conversion until the energy has reached the central offshore platform. This work includes the modelling and simulations of a hypothetical hydraulic wind farm, where results indicate good performance despite the turbulent wind conditions and wake effects.
Cited articles
Aasen, S.: Soil-structure interaction modelling for an offshore wind turbine with monopile foundation, Master's thesis, Norwegian University of Life Sciences, Oslo, 2016.
Andersen, L.: Assessment of lumped-parameter models for rigid footings, Comput. Struct., 88, 1333–1347, 2010.
Andresen, L., Petter Jostad, H., and Andersen, K. H.: Finite element analyses applied in design of foundations and anchors for offshore structures, International Journal of Geomechanics, 11, 417–430, 2010.
API: Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms – Working Stress Design, 22nd Edn., American Petroleum Institute (API), Product No. G2AWSD22, 2014, p. 98, 2014.
Benz, T.: Small-strain stiffness of soils and its numerical consequences, Mitteilung 55, Institut für Geotechnik der Universität Stuttgart, Stuttgart, Germany, 2007.
Bienen, B., Dührkop, J., Grabe, J., Randolph, M. F., and White, D. J.: Response of piles with wings to monotonic and cyclic lateral loading in sand, J. Geotech. Geoenviron., 138, 364–375, 2011.
Brinkgreve, R., Engin, E., and Swolfs, W.: PLAXIS 3D 2013 User manual, Plaxis BV, Delft The Netherlands, 2013.
Brinkgreve, R. B. J., Engin, E., and Engin, H. K.: Validation of empirical formulas to derive model parameters for sands, in: Numerical Methods in Geotechnical Engineering (NUMGE 2010), edited by: Benz, T. and Nordal, S., 137–142, https://doi.org/10.1201/b10551-25, 2010.
Byrne, B. W. and Houlsby, G. T.: Foundations for offshore wind turbines, Philos. T. Roy. Soc. A, 361, 2909–2930, 2003.
Byrne, B. W., McAdam, R. A., Burd, H. J., Houlsby, G. T., Martin, C. M., Gavin, K., Doherty, P., Igoe, D., Zdravković L., Taborda, D. M. G., Potts, D. M., Jardine, R. J., Sideri, M., Schroeder, F. C., Muir Wood, A., Kallehave, D., and Skov Gretlund, J.: Field testing of large diameter piles under lateral loading for offshore wind applications, in: Proceedings of the 16th European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, UK, 17 September 2015, 1255–1260, 2015.
Carswell, W., Johansson, J., Løvholt, F., Arwade, S. R., and DeGroot, D. J.: Dynamic Mudline Damping for Offshore Wind Turbine Monopiles, in: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, California, USA, 8–13 June 2014, Volume 9A: Ocean Renewable Energy San Francisco, Paper No. OMAE2014-23406, 8 pp., https://doi.org/10.1115/OMAE2014-23406, 2014.
Carswell, W., Johansson, J., Løvholt, F., Arwade, S. R., DeGroot, D. J., and Myers, A. T.: Foundation damping and the dynamics of offshore wind turbine monopiles, Renew. Energ., 80, 724–736, 2015.
Cox, W. R., Reese, L. C., and Grubbs, B. R.: Field Testing of Laterally Loaded Piles In Sand, in: Offshore Technology Conference, Houston, Texas, 6–8 May 1974, OTC-2079-MS, https://doi.org/10.4043/2079-MS, 1974.
Damgaard, M., Ibsen, L. B., Andersen, L. V., and Andersen, J.: Cross-wind modal properties of offshore wind turbines identified by full scale testing, J. Wind Eng. Ind. Aerod., 116, 94–108, 2013.
Damgaard, M., Andersen, L. V., and Ibsen, L. B.: Dynamic response sensitivity of an offshore wind turbine for varying subsoil conditions, Ocean Eng., 101, 227–234, 2015.
DNV (DET NORSKE VERITAS): Fatigue design of offshore steel structures, Recommended Practice DNV-RP-C203, 9–21, 2010.
DNV: Design of offshore wind turbine structures, Offshore Standard DNV-OS-J101, 130 pp., 2014.
Doherty, P. and Gavin, K.: Laterally loaded monopile design for offshore wind farms, P. I. Civil Eng., 165, 7–17, 2011.
EWEA: The European offshore wind industry – key trends and statistics 2015, EWEA, 13 pp., 2015a.
EWEA: The economics of wind energy. A report by the European Wind Energy Association, EWEA, 156 pp., 2009b.
Fischer, T., De Vries, W. E., and Schmidt, B.: UpWind Design Basis (WP4: Offshore foundations and support structures), Upwind, Stuttgart, Germany, 139 pp., 2010.
Hanssen, S. B., Eiksund, G., and Nordal, S.: Impact vibration test of monopile foundation model in dry sand, International Journal of Physical Modelling in Geotechnics, 16, 65–82, 2016.
Hearn, E. N. and Edgers, L.: Finite element analysis of an offshore wind turbine monopile, in: GeoFlorida 2010: Advances in Analysis, Modeling & Design, Orlando, Florida, USA, 20–24 February 2010, ASCE, 1857–1865, 2010.
Iwan, W. D.: On a class of models for the yielding behavior of continuous and composite systems, J. Appl. Mech., 34, 612–617, 1967.
Jeanjean, P.: Re-assessment of P-Y curves for soft clays from centrifuge testing and finite element modeling, Offshore Technology Conference, Houston, Texas, 4–7 May 2009, OTC-20158-MS, https://doi.org/10.4043/20158-MS, 2009.
Jonkman, J. and Musial, W.: Offshore code comparison collaboration (OC3) for IEA task 23 offshore wind technology and deployment, Technical Report, NREL/TP-5000-48191, NREL, Golden, CO, USA, 2010.
Jonkman, J., Butterfield, S., Musial, W., and Scott, G.: Definition of a 5-MW reference wind turbine for offshore system development, Technical Report, NREL/TP-500-38060, NREL, Golden, CO, USA, 2009.
Jonkman, J. M. and Buhl Jr., M. L.: FAST User's Guide, Technical Report, NREL/EL-500-38230, National Renewable Energy Laboratory (NREL), Golden, CO, USA, 2005.
Jung, S., Kim, S.-R., Patil, A., and Hung, L. C.: Effect of monopile foundation modeling on the structural response of a 5-MW offshore wind turbine tower, Ocean Eng., 109, 479–488, 2015.
Kallehave, D., Thilsted, C. L., and Troya, A.: Observed variations of monopile foundation stiffness, Chapter 91, in: Frontiers in Offshore Geotechnics III, edited by: Meyer, V., CRC Press, 717–722, 2015.
Kaynia, A. and Kausel, E.: Dynamic behavior of pile groups, 2nd Int. Conf. on Numerical Methods in Offshore Piling, Austin, Texas, 1982.
Kirkwood, P. B.: Cyclic lateral loading of monopile foundations in sand, PhD thesis, University of Cambridge, Cambridge, UK, 2015.
Klinkvort, R. T., Leth, C. T., and Hededal, O.: Centrifuge modelling of a laterally cyclic loaded pile, Chapetr 37, in: Physical Modelling in Geotechnics, Two Volume Set, Proceedings of the 7th International Conference on Physical Modelling in Geotechnics (ICPMG 2010), Zurich, Switzerland, 28 June–1 July 2010, edited by: Seward, L., CRC Press, 959–964, 2010.
Krathe, V. L. and Kaynia, A. M.: Implementation of a non-linear foundation model for soil-structure interaction analysis of offshore wind turbines in FAST, Wind Energy, 20, 695–712, 2017.
Lesny, K.: Foundations for Offshore Wind Turbines: Tools for Planning and Desing, VGE Verlag GmbH, Essen, Germany, 2010.
Little, R. L. and Briaud, J.-L.: Full scale cyclic lateral load tests on six single piles in sand, Defense Technical Information Center (DTIC), DTIC Document, Research Report 5640, 190 pp., 1988.
Mann, J.: Wind field simulation, Probabilist. Eng. Mech., 13, 269–282, 1998.
Masing, G.: Eigenspannungen und Verfestigung beim Messing, in: Proceedings of the Second International Congress for Applied Mechanics, Zurich, Switzerland, 332–335, 1926.
Michalopoulos, V.: Simplified fatigue assessment of offshore wind support structures accounting for variations in a farm, M.S. thesis, Delft University of Technology, Delft, 102 pp., 2015.
Nygaard, T. A., De Vaal, J., Pierella, F., Oggiano, L., and Stenbro, R.: Development, Verification and Validation of 3DFloat; Aero-Servo-Hydro-Elastic Computations of Offshore Structures, Energy Procedia, 94, 425–433, https://doi.org/10.1016/j.egypro.2016.09.210, 2016.
ORE Catapult: Cost Reduction Monitoring Framework Summary Report to OWPB, ORE (Offshore Renewable Energy) Catapult, Blyth, UK, 18 pp., 2015.
Passon, P.: Memorandum: Derivation and Description of the Soil-Pile-Interaction Models, IEA-Annex XXIIII Subtask 2, Stuttgart, Germany, 9 pp., 2006.
Poulos, H. G.: Behavior of Laterally Loaded Piles: I – Single Piles, Journal of the Soil Mechanics and Foundations Division, 97, 711–731, 1971.
Poulos, H. G. and Davis, E. H.: Pile foundation analysis and design, John Wiley & Sons, New York, 354 pp., 1980.
Ragan, P. and Manuel, L.: Comparing estimates of wind turbine fatigue loads using time-domain and spectral methods, Wind Engineering, 31, 83–99, 2007.
Randolph, M. F.: The response of flexible piles to lateral loading, Geotechnique, 31, 247–259, 1981.
Reese, L. C., Cox, W. R., and Koop, F. D.: Field Testing and Analysis of Laterally Loaded Piles om Stiff Clay, Offshore Technology Conference, 5–8 May 1975, Houston, Texas, https://doi.org/10.4043/2312-MS, 1975.
Reese, L. C. and Van Impe, W. F.: Single piles and pile groups under lateral loading, CRC Press, 2010.
Roesen, H. R., Ibsen, L. B., Hansen, M., Wolf, T. K., and Rasmussen, K. L.: Laboratory testing of cyclic laterally loaded pile in cohesionless soil, in: The Twenty-third International Offshore and Polar Engineering Conference, 30 June–5 July 2013, Anchorage, Alaska, International Society of Offshore and Polar Engineers, 2013.
Schafhirt, S., Page, A., Eiksund, G. R., and Muskulus, M.: Influence of Soil Parameters on the Fatigue Lifetime of Offshore Wind Turbines with Monopile Support Structure, Energy Procedia, 94, 347–356, https://doi.org/10.1016/j.egypro.2016.09.194, 2016.
Shirzadeh, R., Devriendt, C., Bidakhvidi, M. A., and Guillaume, P.: Experimental and computational damping estimation of an offshore wind turbine on a monopile foundation, J. Wind Eng. Ind. Aerod., 120, 96–106, 2013.
Tarp-Johansen, N. J., Mørch, C., Andersen, L., Christensen, E. D., and Frandsen, S. T.: Comparing Sources of Damping of Cross-Wind Motion, in: European Offshore Wind 2009: Conference & Exhibition, The European Wind Energy Association, 2009.
Versteijlen, W. G., Metrikine, A., Hoving, J. S., Smidt, E. H., and De Vries, W. E.: Estimation of the vibration decrement of an offshore wind turbine support structure caused by its interaction with soil, Proceedings of the EWEA Offshore 2011 Conference, Amsterdam, The Netherlands, 29 November–1 December 2011, European Wind Energy Association, 2011.
Yeter, B., Garbatov, Y., and Guedes Soares, C.: Spectral fatigue assessment of an offshore wind turbine structure under wave and wind loading, Chapter 46, in: Developments in Maritime Transportation and Exploitation of Sea Resources edited by: Guedes Soares, C. and López Peña, F., CRC Press, 425–433, 2013.
Zaaijer, M. B.: Foundation modelling to assess dynamic behaviour of offshore wind turbines, Appl. Ocean Res., 28, 45–57, 2006.
Short summary
The industry standard for analysis of monopile foundations is inaccurate, and alternative models for foundation behavior are needed. This study investigates how four different soil-foundation models affect the fatigue damage of an offshore wind turbine with a monopile foundation. Stiffness and damping properties have a noticeable effect, in particular for idling cases. At mud-line, accumulated fatigue damage varied up to 22 % depending on the foundation model used.
The industry standard for analysis of monopile foundations is inaccurate, and alternative models...
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