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Title Optimization of Material Layup for Wind Turbine Blade Trailing Edge Panels
Author Roczek, Agnieszka
Supervisor Poulsen, Niels Kjølstad (Mathematical Statistics, Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Branner, Kim (Wind Energy Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2009
Abstract This thesis studies different solutions for the layup of materials used in wind turbine blades. The main goal is to create an optimization tool and to demonstrate the potential improvement that could be brought to the material design without additional costs involved. The optimization objective is to minimize the out of plane deformation of the blade‟s trailing edge panels. Classical laminate theory and sandwich construction principles are utilized in the development of the material layup optimization tool. A pre-study is conducted in order to ensure a motivated choice of the blade region considered in the main part of the thesis. The relevance of the deformations is investigated from both the aerodynamic and structural point of view. A non-linear finite element analysis of the chosen blade region is conducted. A detailed FE-model of an entire blade used in the thesis has been provided by Risø DTU. The FE-results are used to approximate the loading and boundary conditions for the studied panel. The composite layup optimization algorithm is implemented based on the plate problem solution derived. Several glass fibre layup solutions are implemented in the blade model and a thorough analyses focusing on out of plane deformations of the panel are conducted. The efforts for improvement are then continued by introducing new materials, i.e. carbon and bamboo. The primary conclusion drawn from this study confirms significant improvement in the local behaviour of the trailing edge panels obtained by rearranging the original layup of the material. The findings for the utilization of new materials reveal large potential in weight saving, which could be employed in the future wind turbine blade design. Finally, the limitations and challenges of the utilized method for optimization of material layup are summarized
Note This thesis has been elaborated at Wind Energy Department, Risø DTU National Laboratory for Sustainable Energy in cooperation with Department of Informatics and Mathematical Modelling at the Technical University of Denmark
Series IMM-M.Sc.-2009-62
Original PDF ep09_62.pdf (6.12 MB)
Admin Creation date: 2009-10-21    Update date: 2010-08-25    Source: dtu    ID: 251380    Original MXD