A 5 MW composite wind turbine blade was taken as the research subject. Typical load conditions such as gravity
centrifugal force
and aerodynamic force were fully taken into account. Based on the grid search method and combined with the classical laminated plate theory
we aimed to optimize the layering ratio and sequence of the composite laminated layer of the upper and lower beam caps of the main beam. By focusing on maximizing stress reduction and increasing bending stiffness
we were able to determine the optimal layering scheme for the beam cap. The results demonstrated a significant decrease in maximum stress and an increase in bending stiffness for the optimized blade main beam under the same load condition.
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