Browse > Article
http://dx.doi.org/10.5000/EESK.2012.16.3.001

Earthquake Response Analysis of an Offshore Wind Turbine Considering Fluid-Structure-Soil Interaction  

Lee, Jin-Ho (서울대학교 BK 21사회기반건설사업단)
Lee, Sang-Bong (삼성건설 상품기술연구소)
Kim, Jae-Kwan (서울대학교 건설환경공학부)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.16, no.3, 2012 , pp. 1-12 More about this Journal
Abstract
In this study, an analysis method for the earthquake response of an offshore wind turbine model is developed, considering the effects of the fluid-structure-soil interaction. The turbine is modeled as a tower with a lumped mass at the top of it. The tower is idealized as a tubular cantilever founded on flexible seabed. Substructure and Rayleigh-Ritz methods are used to derive the governing equation of a coupled structure-fluid-soil system incorporating interactions between the tower and sea water and between the foundation and the flexible seabed. The sea water is assumed to be a compressible but non-viscous ideal fluid. The impedance functions of a rigid footing in water-saturated soil strata are obtained from the Thin-Layer Method (TLM) and combined with the superstructure model. The developed method is applied to the earthquake response analysis of an offshore wind turbine model. The method is verified by comparing the results with reference solutions. The effects of several factors, such as the flexibility of the tower, the depth of the sea water, and the stiffness of the soil, are examined and discussed. The relative significance of the fluid-structure interaction over the soil-structure interaction is evaluated and vice versa.
Keywords
Offshore structure; Wind turbine; Earthquake response; Fluid-structure interaction; Soil-structure interaction;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Malvern, L.E., Introduction to the Mechanics of a Continuous Medium, Prentice Hall, Englewood Cliffs, New Jersey, 1969.
2 Abramowitz, A., Stegun, I.A., Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, Dover Publications, Inc., New York, 1972.
3 Chopra, A.K., "Hydrodynamic pressures on dams during earthquakes," Journal of the Engineering Mechanics Division, Proceedings of the American Society of Civil Engineers, Vol. 93, No. EM6, 205-223, 1967.
4 Zienkiewicz, O.C., Chan, A.H.C., Pastor, M., Schrefler, B.A. and Shiomi, T., Computational Geomechanics with Special Reference to Earthquake Engineering, John Wiley, New York, 1999.
5 Kausel, E., Forced vibrations of circular foundations on layered media, Research Report R74-11, Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 1974.
6 Wolf, J.P., Dynamic soil-structure interaction, Prentice-Hall, Englewood Cliffs, New Jersey, 1985.
7 Lee, J.H., Kim, J.K., and Tassoulas, J.L., "Dynamic analysis of foundations in a layered half-space using a consistent transmitting boundary," Earthquakes and Structures (accepted).
8 이진호, 김재관, 류정수, "u-w 정식화에 근거한 지하수로 포화된 가로등방성 층상지반에서의 3차원 전달경계", 한국지진공학회 논문집, 제13권, 제6호, 67-86, 2009.
9 김재관, 이진호, 진병무, "경계요소법에 의한 이상유체의 부가 질량 및 슬러싱 강성행렬 도출과 원통형 액체저장탱크 지진응답해석", 한국지진공학회 논문집, 제4권, 제3호, 83-98, 2000.
10 김재관, 조정래, "전달경계를 이용한 댐-호소 계의 지진응답해석", 한국지진공학회 논문집, 제3권, 제1호, 123-131, 1999.
11 Spera, D.A., Wind Turbine Technology, Fundamental Concepts of Wind Turbine Engineering, 2nd Edition, ASME Press, Three Park Avenue, New York, New York, 2009.
12 김기두, 최동호, 심종성, 김경철, "해상풍력 지지구조물의 개발 및 설계", 대한토목학회지, 제59권, 제5호, 28-37, 2011.
13 신윤섭, 박종현, 이영남, "해상풍력 시장 및 요소 기술", 대한토목학회지, 제59권, 제9호, 26-30, 2011.
14 고광오, 정광희, 이종세, 윤성범, "해양에너지 복합발전단지 개발의 필요성과 방안", 대한토목학회지, 제59권, 제12호, 29-36, 2011.
15 NRC, Earthquake Engineering for Concrete Dams: Design, Performance and Research Needs, National Academy Press, 1990.
16 Rammerstorfer, F. G., Sharf, K., and Fisher, F. D., "Storage Tanks under Earthquake Loading," Appl. Mech. Rev., Vol. 43, 261-282, 1990.   DOI
17 Wilson, J.F., Dynamics of Offshore Structures, 2nd Edition, John Wiley & Sons Inc., Hoboken, New Jersey, 2003.
18 Cook, R.D., Malkus, D.S., Plesha, M.E., Witt, R.J., Concepts and Applications of Finite Element Analysis, 4th Edition, John Wiley & Sons Inc., 2002.
19 Chopra, A.K., Dynamics of Structures: Theory and Applications to Earthquake Engineering, 3rd Edition, Prentice Hall, Upper Saddle River, New Jersey, 2006.
20 Fung, Y.C., A First Course in Continuum Mechanics, 3rd Edition, Prentice Hall, Upper Saddle River, New Jersey, 1994.