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Modeling of Blades as Equivalent Beams for Aeroelastic Analysis

[+] Author Affiliations
David J. Malcolm

Global Energy Concepts LLC, Kirkland, WA

Daniel L. Laird

Sandia National Laboratories, Albuquerque, NM

Paper No. WIND2003-870, pp. 293-303; 11 pages
  • ASME 2003 Wind Energy Symposium
  • ASME 2003 Wind Energy Symposium
  • Reno, Nevada, USA, January 6–9, 2003
  • Conference Sponsors: ASME
  • ISBN: 1-56347-594-4


A procedure has been developed and tested to derive a set of one-dimensional beam properties that will duplicate the behavior of a full three-dimensional finite element model of a wind turbine blade. This allows the full features of a detailed model to be transferred to an aeroelastic code for dynamic simulation of the complete wind turbine. The process uses the NuMAD interface to generate an ANSYS® finite element model to which a set of six unit loads are applied at the tip. The displacement results are used in a series of MATLAB routines to extract the stiffness matrices of the desired beam elements. Tests have been carried out on a number of blades and the stiffness matrices incorporated into ADAMS® models of the blades and complete wind turbines.

Topics: Modeling , Blades



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