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http://dx.doi.org/10.5574/IJOSE.2013.3.2.068

Nonlinear Wave Forces on an Offshore Wind Turbine Foundation in Shallow Waters  

Choi, Sung-Jin (Department of Mechanical and Structure Engineering and Material Science, University of Stavanger)
Lee, Kwang-Ho (Maritime & Ocean Engineering Research Institute, KIOST)
Hong, Keyyoung (Maritime & Ocean Engineering Research Institute, KIOST)
Shin, Seong-Ho (Maritime & Ocean Engineering Research Institute, KIOST)
Gudmestad, O.T. (Department of Mechanical and Structure Engineering and Material Science, University of Stavanger)
Publication Information
International Journal of Ocean System Engineering / v.3, no.2, 2013 , pp. 68-76 More about this Journal
Abstract
In this study, a 3D numerical model was used to predict nonlinear wave forces on a cylindrical pile installed in a shallow water region. The model was based on solving the viscous and incompressible Navier-Stokes equations for a two-phase flow (water and air) model and the volume of fluid method for treating the free surface of water. A new application was developed based on the cut-cell method to allow easy installation of complicated obstacles (e.g., bottom geometry and cylindrical pile) in a computational domain. Free-surface elevation, water particle velocities, and inline wave forces were calculated, and the results show good agreement with experimental data obtained by the Danish Hydraulic Institute. The simulation results revealed that the proposed model can, without the use of empirical formulas (i.e., Morison equation) and additional wave analysis models, reliably predict non-linear wave forces on an offshore wind turbine foundation installed in a shallow water region.
Keywords
3D numerical model; Nonlinear wave force; Cylindrical pile; Volume of fluid method; Cut-cell method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Roy D.J., Ghosh S., Wave force on vertical submerged circular thin plat in shallow water, Ocean Engineering 33 (2006) 1935-1953.   DOI   ScienceOn
2 Smagorinsky J., General circulation experiments with the primitive equation. Monthly Weather Review 91(3) (1963) 99-164.   DOI
3 Walkden M.J., Wood D.J., Bruce T., Peregrine D.H., Impulsive seaward loads induced by wave overtopping on caisson breakwaters, Coastal Engineering 42 (2001) 257-276.   DOI   ScienceOn
4 Allied Engineering, User's Manual for Advanced Parallel AMG Version 1.3, Tokyo, (2011).
5 Amsden A.A, Harlow F.H, A simplified MAC technique for incompressible fluid flow calculation, Journal of Computational Physics, 6 (1970) 322-325.   DOI   ScienceOn
6 API RP 2A-WSD, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms - Working Stress Design, Sections 1 & 2, American Petroleum Institute, Washington, USA, (2000).
7 Brorsen M, Larsen J., Source generation of nonlinear gravity waves with the boundary in-tegral equation method, Coastal Engineering 11 (1987) 93-113.   DOI   ScienceOn
8 CERC, Shore Protection Manual, Coastal Engineering Research Center, Corps of Engineers, U.S. Army, (1984).
9 Chen X, Li Y, Teng B., Numerical and simplified methods for the calculation of the total horizontal wave force on a perforated caisson with a top cover, Coastal Engineering 54 (2007) 67-75.   DOI   ScienceOn
10 Choi S.J, Gudmestad O.T, The effect of break-ing wave induced currents on an offshore wind turbine foundation. Fluid Structure Interaction VI:119-131, (2011).
11 Chun I.S, Shim J.S, Choi S.J., Investigation on the design wave forces of ear-do ocean research station II: Fluid force in the breaking wave field, Journal of the Korean Society of Coastal and Ocean Engineers, (2000) 168-180.   과학기술학회마을
12 Hirt C.W, Sicilian J.M., A porosity technique for the definition of obstacles in rectangular cell meshes, Proceedings of the 4th International conference on Numerical Ship Hydrodynamics, Washington D.C., 1-10 (1985).
13 DnV-RP-C205, Recommended Practice, Environmental Conditions and Environmental Loads, 44, 52-53, DET NORSKE VERITAS, Oslo, Norway (2007).
14 Hinatsu M., Numerical simulation of unsteady viscous nonlinear waves using moving grid systems fitted on a free surface, J. Kansai Soc. Naval Archit., 217 (1992) 1-11.
15 Hirt C.W., Nichols B.D., Volume of fluid meth-od for the dynamics of free boundaries, Journal of Computational Physics, 39(1) (1981) 201-225.   DOI   ScienceOn
16 Hsu T.J., Sakakiyama T, Liu P.L-F., A numerical model for wave motions and turbulence flows in front of a composite breakwater. Coastal Engineering 46 (2002) 25-50.   DOI   ScienceOn
17 ISO 19902, Petroleum and natural gas industries - Fixed steel offshore structures, CEM, Brussels, Belgium (2007).
18 Kawasaki K, Iwata K., Numerical analysis of wave breaking due to submerged breakwater in three-dimensional wave fields, Proceedings of the Conference of the American Society of Civil Engineers, Copenhagen, Denmark, 853-866, (1998).
19 Lee K.H., Mizutani N., A numerical wave tank using direct-forcing immersed boundary method and its application to wave force on a horizontal cylinder. Coastal Engineering Journal 51 (2009) 27-48.   DOI   ScienceOn
20 Lee K.H., Park J.H., Baek D.J., Cho S., Kim D.S., Discussion on optimal shape for wave power converter using oscillating water column, Journal of the Korean Society of Coastal and Ocean Engineers 23(5) (2011) 345-357.   과학기술학회마을   DOI   ScienceOn