Abstract
Wind turbines are located at open fields to generate the electricity by using natural power of wind. Turbine blades have aero foil shapes they must tolerable against the bird impacts. We discussed here a methodology for damage valuation. Structural response of the blade is evaluated through implicit / explicit finite element simulations addressing its static and dynamic behavior focusing on deformation, stresses, damage mechanisms, and energy absorption. Impactor geometry is considered as cylindrical rigid body proportional mass of 2 kg, along with velocity 9.5 m/s which represents the bird. Stresses and deflections for impact loading were found to be around 90 MPa near the hub root fillet, and 70 Mpa in the laminate blade profile. Hub and Blade both are well within the limits. The structural response at different time shows the impact force on the blade is transmitted through the lateral and longitudinal stiffeners. Displacements are found to be around 16 mm, which follow the expected pattern and are within acceptable limits.