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Increasing demand in energy facilitated the need of clean energy such as wind energy.In thisproject modal analysis has been used to determine the natural frequencies and the mode shapesof frame and impeller of vertical axis wind turbine with impeller. FEA consists of a computer model of a material. Analyzed for specific results. FEA uses a complex system of points called nodes which make a grid called a mesh. Nodes are assigned at a certain density throughout the material depending on the anticipated stress levels of a particular area. Regions which will receive large amounts of stress usually have a higher node density than those which experience little or no stress. Points of interest may consist of: fracture point of previously tested material, fillets, corners, complex detail, and high stress areas. The mesh acts like a spider web in that from each node, there extends a mesh element to each of the adjacent nodes. This web of vectors is what carries the material properties to the object, creating many elements. The natural frequencies originating from the FE-modelingand the modal analysis, respectively, are observed. Comparing the mode shapesgood agreement has been demonstrated for the dominating deflectiondirection. For the non-dominating deflection directions, the qualitative featuresof measured and computed modes shapes are in good agreement.

Modal Analysis of Vertical Wind Turbine’s Frame and Impeller