Calculating Environmental Design Loads for Floating Wind Turbine
Keywords:explicit finite element analysis, environmental design loads, load formulation for floating turbine
Analysis of complicated structures usually requires; choice of the commercial software as well as good formulation of elements, and loads. The LS-DYNA3D explicit finite element dynamic analysis programme is believed to be good in performing structural analysis of a floating wind turbine and in simulating a full-scale model typical for moderate deep waters. The intended model for which loads are discussed is a middle size power rated floating 3 blades wind turbine elevated at about 50 m above main sea level a top a tripod lattice steel tower firmly resting on a moored floating concrete hull buoy, positioned on a concrete circular disk. The model is intended for use in moderately deep waters of up to 500m. The knowledge of floating offshore wind structures and important features of the LS-DYNA3D code are briefly revised. The theoretical basics for service loads experienced by the floating wind turbine are explored and the environmental loads are quantified and ready for use in the analysis.
Jerry I Lin “DYNA3D: A Nonlinear, Explicit, Three-Dimensional Finite Element Code for Solid and Structural Mechanics” User Manual, October 1999 http://www.llnl.gov/eng/mdg/Codes/DYNA3D.pdf , April 2003.
Klaus Weimar “LS-DYNA User’s Guide” Rev. 1.19, September 2001, CAD-FEM GmbH, www.cadfem.de or PWS www.p-w-s.com, June 2002.
Jhon O Halliquist “LS-DYNA Theoretical Manual” May 1998 Livermore Software Technology Corporation, online PDF file LSTC website.
Subramani Balasubranyam “Head Impact Characterization of Generic A-Pillar Of An Automobile” MSc thesis, Morgantown, West Virginia 1999 http://etd.wvu.edu/ETDS/E699/finalThesis6.PDF, August 2003.
Mohamed A Almherigh, “Evaluation of Finite Element Techniques Applied to Floating Offshore Wind Turbine” Ph. D thesis, The University of Salford, Salford, UK, 2006.
Det Norske Veritas “Guidelines for Design of Wind Turbines” second edition 2002, printed by Judsk Centraltrykkeri, Denmark ISBN 87-550-2870-5
Noble Denton for the Department of Energy “Environmental Parameters on the United Kingdom Continental Shelf” Offshore Technology Report OTH 84 201.
Department of Energy “Probability Distributions for Environmental Loads on Offshore Structures” report prepared by Lloyd’s Register of Shipping for the Department of Energy, offshore technology report OTI 88 504 HMSO publication 1988 UK.
Department of Energy “Guidance on the Design and Construction of Offshore Installations” HMSO publication 1974 UK.
Department of Energy “Fluid Loading on Fixed Offshore Structures Volume I” Offshore Technology Report OTH 90 322 HMSO Publication 1990 UK.
Various editors “Advanced Offshore Engineering” Benthham press 10/ 1994
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