Wind and Structures

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Natural frequency of bottom-fixed offshore wind turbines considering pile-soil-interaction with material uncertainties and scouring depth

  • Yi, Jin-Hak (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Kim, Sun-Bin (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Yoon, Gil-Lim (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Andersen, Lars Vabbersgaard (Department of Civil Engineering, Aalborg University)
  • Received : 2015.11.15
  • Accepted : 2015.12.07
  • Published : 2015.12.25
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Abstract

Monopiles have been most widely used for supporting offshore wind turbines (OWTs) in shallow water areas. However, multi-member lattice-type structures such as jackets and tripods are also considered good alternatives to monopile foundations for relatively deep water areas with depth ranging from 25-50 m owing to their technical and economic feasibility. Moreover, jacket structures have been popular in the oil and gas industry for a long time. However, several unsolved technical issues still persist in the utilization of multi-member lattice-type supporting structures for OWTs; these problems include pile-soil-interaction (PSI) effects, realization of dynamically stable designs to avoid resonances, and quick and safe installation in remote areas. In this study, the effects of PSI on the dynamic properties of bottom-fixed OWTs, including monopile-, tripod- and jacket-supported OWTs, were investigated intensively. The tower and substructure were modeled using conventional beam elements with added mass, and pile foundations were modeled with beam and nonlinear spring elements. The effects of PSI on the dynamic properties of the structure were evaluated using Monte Carlo simulation considering the load amplitude, scouring depth, and the uncertainties in soil properties.

Keywords

Acknowledgement

Grant : Reliability-based design of offshore wind turbines with focus on load estimation and dynamic soil-structure interaction

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP), Danish Agency for Science Technology and Innovation

References

  1. Adhikari, S. and Bhattacharya, S. (2011), "Vibrations of wind-turbines considering soil-structure interaction", Wind Struct., 14(2), 85-112. https://doi.org/10.12989/was.2011.14.2.085
  2. Alati, N., Nava, V., Failla, G., Arena, F. and Santini, A. (2014), "On the fatigue behavior of support structures for offshore wind turbines", Wind Struct., 18(2), 117-134. https://doi.org/10.12989/was.2014.18.2.117
  3. Alexander, NA and Bhattacharya, S (2011), "The dynamics of monopile-supported wind turbines in nonlinear soil", Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011, Leuven, Belgium, 4-6 July 2011.
  4. API (2005), Recommended Practice for Planning, Design and Constructing Fixed Offshore Platforms-Working Stress Design, American Petroleum Institute Publishing Service, Washington D.C.
  5. Bisoi, S. and Haldar, S. (2014), "Dynamic analysis of offshore wind turbine in clay considering soil-monopile-tower interaction", Soil Dynam. Earthq. Eng., 63, 19-35. https://doi.org/10.1016/j.soildyn.2014.03.006
  6. Carswell, W. (2012), Probabilistic Analysis of Offshore Wind Turbine Soil-Structure Interaction, MSc Thesis, University of Massachusetts, Amherst.
  7. Carswell, W., Arwade, S.R., Myers, A.T. and Hajjar, J.F. (2014), Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures, CRC Press.
  8. Damgaard, M., Ibsen, L.B., Andersen, L.V. and Andersen, J.K.F. (2013), "Cross-wind modal properties of offshore wind turbines identified by full scale testing", J. Wind Eng. Ind. Aerod., 116, 94-108. https://doi.org/10.1016/j.jweia.2013.03.003
  9. Evans, L.T. Jr. and Duncan, J.M. (1982), Simplified Analysis of Laterally Loaded Piles, Report UCB/GT/82-04, University of California, Berkley.
  10. EWEA (2013), Deep water - The next step for offshore wind energy, A report by the European Wind Energy Association.
  11. Hogedal, M. and Hald, T. (2005), Scour Assessment and Design for Scour for Monopile Foundations for Offshore Wind Turbines, Copenhagen Offshore Wind 2005
  12. Jonkman, J.M. and Buhl Jr, M.L. (2005), FAST User's Guide, Technical Report NREL/EL-500-38230 August 2005
  13. KEPRI (2013), Test Bed for 2.5GW Offshore Wind Farm at Yellow Sea, Interim Design Basis Report, Korea Electric Power Research Institute, Daejeon, Korea.
  14. Kim, G., Park, D., Kyung, D. and Lee, J. (2014), "CPT-based lateral displacement analysis using p-y method for offshore mono-piles in clays", Geomech. Eng., 7(4), 459-475. https://doi.org/10.12989/gae.2014.7.4.459
  15. Larsen, T.J. and Hansen, A.M. (2007), How 2 HAWC2, the user's manual, Riso-R-1597(ver. 3-1)(EN).
  16. Licari, J. (2013), Control of a variable-speed wind turbine, PhD Thesis, Institute of Energy, Cardiff University.
  17. Martinez-Chaluisant, V. (2011), Static and Dynamic Response of Monopiles for Offshore Wind Turbines, University of Wisconsin-Madison
  18. Pradhan, D.L. (2012), Development of P-Y Curves for Monopiles in Clay using Finite Element Model Plaxis 3D Foundation, Norwegian University of Science and Technology.
  19. Song, B., Huang, F.T. and Li, K.W. (2014), "Pile-soil Interaction Impact on Dynamic Response of Offshore Wind Tower Founded on Monopoles", Proceedings of the International Conference on Mechanics and Civil Engineering, ICMCE 2014, 305-310.
  20. Van Buren, E. and Muskulusa, M. (2012), "Improving pile foundation models for use in bottom-fixed offshore wind turbine applications", Energy Procedia, 24, 363-370. https://doi.org/10.1016/j.egypro.2012.06.119
  21. Van Der Tempel, J., Zaaijer, M.B., and Subroto, H. (2004), The effects of Scour on the design of Offshore Wind Turbines, MAREC 2004.
  22. Weinert, J. (2015), Detecting critical scour developments at monopile foundations under operating conditions, Presented at EWEA 2015.
  23. Yi, J.H., Kim, S.B., Han, T.H. and Yoon, G.L. (2015a), "Probabilistic assessment of dynamic properties of offshore wind turbines considering soil-pile interaction", J. Comput. Struct. Eng. Inst. Korea, 28(4), 343-350. https://doi.org/10.7734/COSEIK.2015.28.4.343
  24. Yi, J.H., Kim, S.B., Han, T.H., Yoon, G.L. and Andersen, L.V. (2015b), "Influence of pile-soil-interaction on natural frequency of bottom-fixed offshore wind turbines considering material uncertainties", Proceedings of the 2015 World Congress on Advances in Structural Engineering and Mechanics (ASEM 15), Incheon, Korea.

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