Advertisement

Explicit Structural Response-Based Methodology for Assessment of Operational Limits for Single Blade Installation for Offshore Wind Turbines

  • Amrit Shankar Verma
  • Yuna Zhao
  • Zhen Gao
  • Nils Petter Vedvik
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 23)

Abstract

The growing requirements of large-sized offshore wind turbines require heavier components to be lifted to large heights using installation vessels. This imposes a substantial risk of impact to the lifted components especially when floating crane vessels are used. Floating crane vessels are in general sensitive to wave-induced motion, causing substantial crane tip responses and can lead to significant damage to the lifted blades. Currently, the planning for such weather sensitive operation does not include explicitly the risk of contact/impact or damage in the components to determine the operational limits. This is important for wind turbine blades owing to the fact that they are made of composite materials and are vulnerable to damage from contact/impact loads. The present paper proposes a novel methodology to determine response based operational limit for the blade installation by considering impact loads. Structural damage criteria for the lifted blade under accidental loads are linked with global response analysis of the installation system under stochastic wind and wave loads. A case study is also presented where a wind turbine blade lifted horizontally using jack-up crane vessel impacts the pre-assembled turbine tower with its tip region while being installed under mean wind speed of 10 m/s. It is found that under such conditions, it is safe to install blade from structural damage perspective as the characteristic responses obtained were low to develop any damage in the blade. The findings of the study can be used to derive limiting sea states for blade installation using floating vessels, however a damage tolerance approach requiring residual strength analysis post impact is compulsory.

Keywords

Offshore wind turbine blade Operational limits Contact/impact behaviour Marine operation Jack-up vessel Floating crane vessel 

Notes

Acknowledgements

This work was made possible through the SFI MOVE projects supported by the Norwegian Research Council, NFR project number 237929.

References

  1. 1.
    Wind Europe Report (2016) Key trends and statistics of the European offshore wind industry 2016Google Scholar
  2. 2.
    M. V. O WIND: First V164-8.0 MW turbine installed at Burbo Bank Extension, http://www.mhivestasoffshore.com. Accessed 15 Sept 2017
  3. 3.
    Zhao Y, Cheng Z, Sandvikd PC, Moan T, Gao Z (2017) An integrated dynamic analysis method for simulating installation of a single blade for offshore wind turbines. Ocean Eng 152:72–88CrossRefGoogle Scholar
  4. 4.
    Kuijken L (2015) Single blade installation for large wind turbines in extreme wind conditions. Master of Science Thesis, Technical University of DenmarkGoogle Scholar
  5. 5.
    Verma AS, Gao Z, Vedvik NP (2017) Numerical assessment of wind turbine blade damage due to contact/impact with tower during installation. In: IOP conference series materials science and engineering V276(1). IOP Publishing, pp 012–025Google Scholar
  6. 6.
    Agrawal S, Singh KK, Sarkar P (2014) Impact damage on fibre-reinforced polymer matrix compositea review. J Compos Mater 48(3):317–332CrossRefGoogle Scholar
  7. 7.
    Haselbach PU (2015) Ultimate strength of wind turbine blades under multiaxial loading. Ph.D Thesis, DTU Wind EnergyGoogle Scholar
  8. 8.
    Lee HG, Kang MG, Park J (2015) Fatigue failure of a composite wind turbine blade at its root end. Compos Struct 133:878–885CrossRefGoogle Scholar
  9. 9.
    McGugan M, Pereira G, Srensen BF, Toftegaard H, Branner K (2015) Damage tolerance and structural monitoring for wind turbine blades. Phil Trans R Soc A 373(2035):20140077CrossRefGoogle Scholar
  10. 10.
    Acero WG, Li L, Gao Z, Moan T (2016) Methodology for assessment of the operational limits and operability of marine operations. Ocean Eng 125:308–327CrossRefGoogle Scholar
  11. 11.
    Acero WG, Gao Z, Moan T (2017) Methodology for assessment of the allowable sea states during installation of an offshore wind turbine transition piece structure onto a monopile foundation. J Offshore Mech Arctic EngGoogle Scholar
  12. 12.
    Li L, Gao Z, Moan T (2016) Operability analysis of monopile lowering operation using different numerical approaches. Int J Offshore Polar Eng 26(02):88–99CrossRefGoogle Scholar
  13. 13.
    Li C, Gao Z, Moan T, Lu N (2014) Numerical simulation of transition piece-monopile impact during offshore wind turbine installation. In: The twenty-fourth international ocean and polar engineering conference. International society of offshore and polar engineersGoogle Scholar
  14. 14.
    Wang W, Bai Y (2010) Investigation on installation of offshore wind turbines. J Marine Sci Appl 9(2):175–180CrossRefGoogle Scholar
  15. 15.
  16. 16.
    Bak C, Zahle F, Bitsche R, Kim T, Yde Y, Henriksen LC, Andersen PB, Natarajan A, Hansen MH Design and performance of a 10 MW wind turbine. J Wind Energy (To be accepted)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Amrit Shankar Verma
    • 1
  • Yuna Zhao
    • 1
  • Zhen Gao
    • 1
  • Nils Petter Vedvik
    • 2
  1. 1.Department of Marine TechnologyNorwegian University of Science and Technology (NTNU)TrondheimNorway
  2. 2.Department of Mechanical and Industrial EngineeringNTNU Richard Birkelandsvei 2BTrondheimNorway

Personalised recommendations