17-01: Blade DynamicsAbstract: The usual way of designing large fans is with wide and stiff blades rigidly connected to the hub. This way leads, often, to high time dependent load variations causing high vibration amplitude and high stress. Both stress and vibrations are strictly related to the blade's dynamic response to the aerodynamic force's pulses. A proper choice of the blades' mechanical and physical characteristics (stiffness and mass distribution, aerodynamic
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