KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Load and Structural Analysis of an Offshore Wind-Turbine Foundation with Weight Control Functionality

자중조절 기능이 있는 해상풍력 지지구조의 하중 및 구조해석

  • Oh, Minwoo (Graduate Sschool of Mechanical and Aerospace Eng., Gyeongsang National Univ. and CAE-KOREA Co., Ltd.) ;
  • Kim, Donghyun (Graduate Sschool of Mechanical and Aerospace Eng., Gyeongsang National Univ. and CAE-KOREA Co., Ltd.) ;
  • Kim, Kiha (Graduate Sschool of Mechanical and Aerospace Eng., Gyeongsang National Univ. and CAE-KOREA Co., Ltd.) ;
  • Kim, Seoktae (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2016.08.01
  • Accepted : 2016.09.02
  • Published : 2016.09.30
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Abstract

Offshore wind turbines are divided into an upper wind turbine and a lower support structure. Offshore wind turbine system is required to secure high reliability for a variety of external environmental conditions compared to ground wind turbines because of additional periodic loads due to ocean wave and current effects. In this study, extreme load analyses have been conducted for the designed offshore wind turbine foundation with weight control functionality using computational fluid dynamics (CFD) then structural analyses have been also conducted to investigate the structural design requirement.

해상풍력터빈 시스템은 크게 상부의 풍력터빈과 하부의 지지구조로 구성된다. 해상풍력발전은 육상용 풍력발전보다 우수하다는 평가가 지배적이지만 육상용 풍력발전에서 고려되지 않는 파랑에 의한 주기적인 하중이 추가로 고려되기 때문에 다양한 외부 환경조건에 대하여 높은 안정성 확보가 요구된다. 본 연구에서는 전산유체역학 기법을 활용하여 설계된 해상풍력 하부구조에 대한 하중해석을 수행하고 유한요소해석을 통해 설계된 자중조절형 해상풍력 기초에 대한 구조 건전성을 검토하였다.

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References

  1. Gravity Base Foundation (https://vimeo.com/79661595).
  2. A. Attari, P. Doherty, E.R. Amoros, and C. Paulotto. "Design drivers for buoyant gravity-based foundations," WIND ENERGY, Vol. 10, 2015.
  3. M.D. Esteban, B. Counago, J.S. Lopez-Gutierrez, V. Negro, and F. Vellisco. "Gravity based support structures for offshore wind turbine generators: Review of the installation process," Ocean Engineering, Vol. 110, Part A, 2015, pp. 281-291. https://doi.org/10.1016/j.oceaneng.2015.10.033
  4. I.R. de T. Alonso. "Gravity Base Foundations for Offshore Wind Farms: Marine Operations and Installation Processes," Master in European Construction Engineering, University of Cantabria, 2013.
  5. H.G. Kim, H.K. Jeon, K.D. Kim, "Multi-Piled Concrete Foundation for Offshore Wind Turbines", Magazine of the Korea Concrete Institute, Vol. 26, No. 4, 2014, pp. 20-24. https://doi.org/10.22636/MKCI.2014.26.4.20
  6. K.D. Kim, J.S. Sim, S.Y. Choi, "New Concrete and Steel-Concrete Support Structure of Offshore Wind Turbine Using Pile Foundation in 40m Water Depth," Korean Society of Civil Engineers, Vol. 60, No. 7, 2012, pp. 33-38.
  7. S.G. Lee, D.H. Kim, "Reliability Analysis of Gravity-based Offshore Wind Turbine Foundation Considering Ocean Environmental Loads and Soil Uncertainty," Journal of Ocean Engineering and Technology, Vol. 29, No. 5, 2015, pp. 359-365. https://doi.org/10.5574/KSOE.2015.29.5.359
  8. J.H. Kim, G.G. Choi, G.S. Zi, "Tower-Support Connection on Offshore Concrete Wind Energy Substructures," Magazine of the Korea Concrete Institute, Vol. 26, No. 4, 2014, pp. 25-31. https://doi.org/10.22636/MKCI.2014.26.4.25