Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
권호 표지
DOI QR코드

DOI QR Code

Probabilistic Assessment of Dynamic Properties of Offshore Wind Turbines Considering Soil-Pile Interaction

지반과 말뚝의 상호작용을 고려한 고정식 해상풍력터빈의 동적 특성에 대한 확률적 평가

  • Yi, Jin-Hak (Coastal and Environmental Research Division, Korea Institute of Ocean Science and Technology) ;
  • Kim, Sun-Bin (Coastal and Environmental Research Division, Korea Institute of Ocean Science and Technology) ;
  • Han, Taek Hee (Coastal and Environmental Research Division, Korea Institute of Ocean Science and Technology) ;
  • Yoon, Gil-Lim (Coastal and Environmental Research Division, Korea Institute of Ocean Science and Technology)
  • 이진학 (한국해양과학기술원 연안공학연구본부) ;
  • 김선빈 (한국해양과학기술원 연안공학연구본부) ;
  • 한택희 (한국해양과학기술원 연안공학연구본부) ;
  • 윤길림 (한국해양과학기술원 연안공학연구본부)
  • Received : 2015.06.08
  • Accepted : 2015.07.16
  • Published : 2015.08.28
Download PDF
⟨ Previous Next ⟩

Abstract

Extensive discussion on the optimal types of offshore wind turbine(OWT) among monopile, tripod and jacket in the intermediate depth of water has been actively carried out in worldwide wind turbine industry. Selecting the optimal types of OWT among several substructural types, it is required to consider the economic and technical feasibility including dynamically stable design of a wind turbine system. In this study, the effects of loading levels and uncertainties of soil properties on the natural frequency of OWT have been quantitatively investigated. In conclusion, the natural frequency of monopile-type OWTs has a significant level of uncertainty, hence it is very important to minimize the level of uncertainties in soil properties when the monopile is selected as a foundation for an OWT.

천해역에서의 해상풍력터빈의 기초 형식으로 모노파일, 트라이포드, 재킷 등의 고정식 기초 사이의 최적의 지지구조물 선별에 대한 논의가 세계적으로 활발하게 되어왔다. 다양한 기초 형식 가운데 어떤 기초를 최종 선택하기 위해서는 경제성과 함께 동적설계 측면에서의 검토도 필요하다. 이 연구에서는 고정식 기초를 해상풍력터빈의 기초로 적용하는 경우 전체 구조물의 고유주파수에 미치는 하중 및 지반 물성치의 불확실성의 영향을 정량적으로 검토하였다. 연구결과, 모노파일의 고유주파수의 변동이 가장 심한 것을 알 수 있었고, 따라서 모노파일 기초를 설계에 반영하는 경우에는 지반 물성치의 불확실성을 최소화시키는 것이 중요하다는 것을 알 수 있었다.

Keywords

References

  1. API (2005) Recommended Practice for Planning, Design and Constructing Fixed Offshore Platforms-Working Stress Design, American Petroleum Institute Publishing Service, Washington D.C., 1-263.
  2. Barber, E.S. (1953) Discussion to Paper by S.M. Gleser, ASTM, STP, 154, pp.96-99.
  3. Davisson, M.T., Gill, H.L. (1963) Laterally Loaded Piles in Layered Soil System, J. Soil Mech. Found. Div., ASCE, 89(3), pp.63-94.
  4. Det Norske Veritas, RISO National Laboratory (2002) Guidelines for Design of Wind Turbines, 2nd Edition.
  5. Evans, L.T.Jr., Duncan, J.M. (1982) Simplified Analysis of Laterally Loaded Piles. Report UCB/GT/82-04, University of California, Berkeley.
  6. EWEA (2013) Deep water? The Next Step for Offshore Wind Energy, European Wind Energy Association.
  7. Garrad Hassan, Partners Limited (GH) (2003) GH Bladed Theory Manual.
  8. Hetenyi, M. (1946) Beams on Elastic Foundations, University of Michigan Press, Ann Arbor.
  9. Jonkman, J.M., Buhl, M.L. (2005) FAST User's Guide, Technical Report NREL/EL-500-38230.
  10. Jonkman, J., Butterfield, S., Musial, W., Scott, G. (2009) Definition of a 5-MW Reference Wind Turbine for Offshore System Development, Technical Report NREL/TP-500-38060.
  11. Jonkman, B.J., Kilcher, L. (2012) TurbSim User's Guide: Version 1.06.00, NREL Technical Report.
  12. KOPEC (2013) Test Bed for 2.5GW Offshore Wind Farm at Yellow Sea, Interim Design Basis Report.
  13. Matlock, H. (1970) Correlation for Design of Laterally Loaded Piles in Soft Clay, Proc., 2nd Ann. Offshore Technol, Conf., OTC, Houston, Texas, pp.577-594.
  14. Winkler, E. (1867) Die Lehre von der Elastisitat und Festigkeit, Dominicus, Prague, Czech Republic.
  15. Yoon, G.L., Kim, S.B., Kwon, O.S., Yoo, M.S. (2014) Partial Safety Factor of Offshore Wind Turbine Pile Foundation in West-South Mainland Sea, J. Korean Soc. Civil Eng., 34(5), pp.1489-1504. https://doi.org/10.12652/Ksce.2014.34.5.1489

Cited by

  1. Natural frequency of bottom-fixed offshore wind turbines considering pile-soil-interaction with material uncertainties and scouring depth vol.21, pp.6, 2015, https://doi.org/10.12989/was.2015.21.6.625