Aeroelastic FE modelling of wind turbine dynamics
(English)In: Computers & structures, ISSN 0045-7949, E-ISSN 1879-2243Article in journal (Refereed) Submitted
By designing wind turbines with very flexible components it is possible toreduce loads and consequently the associated cost. As a result, the increased flexibilitywill introduce geometrical nonlinearities. Design tools that can cope with those nonlinearitieswill therefore be necessary at some stage of the design process. The developedmodel uses the commercial finite element system MSC.Marc, which is an advanced finiteelement system focused on nonlinear design and analysis, to predict the structuralresponse. The aerodynamic model named AERFORCE, used to transform the wind toloads on the blades, is a Blade-Element/Momentum model, developed by The SwedishDefence Research Agency (FOI, previously named FFA). The paper describes the developedmodel with focus on component modelling to allow for geometrical nonlinearities.Verification results are presented and discussed for an extensively tested Danwin 180 kWstall-controlled wind turbine. Code predictions of mechanical loads, fatigue and spectralproperties, obtained at normal operational conditions, have been compared with measurements.The simulated results correspond well with measurements. Results from a bladeloss simulation are presented to exemplify the versatility of the developed code.
wind turbine, structural dynamics, aeroelasticity, finite element, nonlinear analysis
IdentifiersURN: urn:nbn:se:kth:diva-5013OAI: oai:DiVA.org:kth-5013DiVA: diva2:7489
QC 201008262005-04-042005-04-042010-08-26Bibliographically approved