This paper presents a framework for the dynamic and aeroelastic analysis of a horizontal axis wind turbine modeled as a multi-flexible-body system. The multi-rigid-body portions of the system, composed of the nacelle and hub, are modeled as a system of interconnected rigid bodies using Kane’s equations. The flexible portions, composed of the the blades and tower, are represented using nonlinear beam finite elements, taken from a mixed formulation for the dynamics of moving beams. Each analysis leads to a set of symbolic equations that can be coupled symbolically to represent the dynamic behavior of the wind turbine. A solution procedure is implemented to assess the dynamic stability of the system. Here the solution is divided into two parts: a set of nonlinear ordinary differential equations governing the periodic steady-state operating condition, and a set of equations that are linearized about the steady-state operating condition governing the transient dynamics. The harmonic balance method is used for the nonlinear periodic steady-state solution, and the finite element in time method is proposed as an alternative method. Linearization of the equations about the steady-state operating condition yields system equations with periodic coefficients which are solved by Floquet approach to extract the modal parameters. For the aeroelastic analysis, aerodynamic loads from an aerodynamic model to be selected in the future will be inserted into the present framework. Then, the framework can produce a symbolic system matrix, potentially useful for control design. Numerical results are presented for the dynamic characteristic of HAWT’s with flexible tower and blades.
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ASME 2002 Wind Energy Symposium
January 14–17, 2002
Reno, Nevada, USA
Conference Sponsors:
- ASME
ISBN:
1-56347-476-X
PROCEEDINGS PAPER
A Framework for Dynamic and Aeroelastic Analysis of Horizontal Axis Wind Turbines
Donghoon Lee,
Donghoon Lee
Georgia Institute of Technology, Atlanta, GA
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Dewey H. Hodges
Dewey H. Hodges
Georgia Institute of Technology, Atlanta, GA
Search for other works by this author on:
Donghoon Lee
Georgia Institute of Technology, Atlanta, GA
Dewey H. Hodges
Georgia Institute of Technology, Atlanta, GA
Paper No:
WIND2002-44, pp. 223-236; 14 pages
Published Online:
February 24, 2009
Citation
Lee, D, & Hodges, DH. "A Framework for Dynamic and Aeroelastic Analysis of Horizontal Axis Wind Turbines." Proceedings of the ASME 2002 Wind Energy Symposium. ASME 2002 Wind Energy Symposium. Reno, Nevada, USA. January 14–17, 2002. pp. 223-236. ASME. https://doi.org/10.1115/WIND2002-44
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