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Effect of length and thickness of the outboard segment on nondimensional bending or extension-dominated second mode frequency of a two-segment spar
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An analytical model for the free vibration of non-uniform, anisotropic, thin-walled wind turbine blade is presented. The blade is constructed from laminated fibrous composite materials with variable thickness and stiffness. The study focuses on the blade spar that represents the main supporting structure within a wind turbine blade. Two specific la...
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Context 1
... effect of segment length and wall thickness on the second bending or extension-dominated frequency is shown in Fig. 8. It is observed that the whole domain is divided into two distinct regions in which the upper one contains the global minimum while the lower one contains two local maxima at =0.25 and =0.75. This result indicates the importance of studying the higher modes of vibrations in the case of multiple-segment blade optimization. Thus, ...
Context 2
... effect of segment length and wall thickness on the second bending or extension-dominated frequency is shown in Fig. 8. It is observed that the whole domain is divided into two distinct regions in which the upper one contains the global minimum while the lower one contains two local maxima at =0.25 and =0.75. This result indicates the importance of studying the higher modes of vibrations in the case of multiple-segment blade optimization. Thus, maximization of the fundamental frequencies alone doesn't guarantee maximization of other higher frequencies. Steps Towards Innovative Sustainable Development NRC-ICED 2018 May 6-8, 2018 Cairo, ...
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