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Mankar, Sh
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article
Vibration analysis of a small wind turbine blade
Abstract
Composite materials have various complicated characteristics according to use of the constituent materials and boundary conditions. Therefore, it is difficult to analyze properties of composite materials. The composite materials are well known by their excellent combination of high structural stiffness and low weight. Their anisotropy allows the designer to tailor the material in order to achieve the desired performance requirements. Thus, it is necessary to develop tools that allow the designer to obtain designs, considering the structural requirements and functional characteristics. For efficient use of composite materials in engineering applications, the dynamic behavior (i.e. natural frequencies) should be known. This paper focuses on the behavior of small wind turbine blades manufactured from composite materials. Two small wind turbine blades are manufactured from the Glass Fiber Reinforced Plastic (GFRP) and GFRP with steel wire mesh reinforcement. Finite Element Analysis (FEA) was carried out by using finite element software ANSYS 16.0. From FEA theoretical natural frequencies and mode shapes of blades manufactured from the GFRP and GFRP with steel wire mesh reinforcement were obtained. Experimental free vibration test of manufactured blades were carried out to find the practical natural frequencies and mode shapes. Finally the results obtained from the FEA and experimental test for the blade manufactured from GFRP and GFRP with steel wire mesh are compared.