Abstract
ABSTRACT Long and flexible offshore wind turbine blades are easily damaged during extreme wind conditions (typhoon or tornado). A parametric study was conducted in this work using the finite element method to study the effect of stiffener configurations, including stiffener number, thickness, and spacing, on the aeroelastic response and buckling of the wind turbine blade by modeling the National Renewable Energy Laboratory (NREL) 5 MW blade structure design. This study investigates wind turbine blade stiffeners' buckling behaviour and natural frequencies. The results show that the critical buckling load value increases significantly as the number of stiffeners, stiffener thickness, and spacing width between stiffeners increase. The modal analysis results show that the variation in the number and thickness of stiffeners increases the natural frequencies of the flaps and torsional modes but decreases the edgewise mode. Variation of the distance between stiffeners increases the flapwise and edgewise modes' natural frequencies.
Published Version
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