Renewable Energy, Vol.34, No.3, 827-832, 2009
On the structural behaviour of variable-geometry oval-trajectory Darrieus wind turbines
We developed a computational model based on a finite-element mixed formulation with quadratic isoparametric beam elements. We applied this model to the analysis of a blade-wagon: a novel structure characteristic of an innovative concept in wind-power called VGOT Darrieus turbine. We studied the structural behaviour of its main components: chassis, suspension and blade, using combinations of beam/bar elements in an appropriate assembling. We defined a set of parameters to characterize the structural behaviour which help to understand the contribution of the different components and assist the process of redesign. (C) 2008 Elsevier Ltd. All rights reserved.
Keywords:Finite-element method;Wind-turbine structure;Mixed-formulation isoparametric element;Timoshenko beam element;Wind-turbine innovative concept