Rotor Blade with Radial Absorber (Coriolis Damper) - Loads Evaluation

A rotor blade with a discrete radial vibration absorber is analyzed to examine the effect of the absorber on rotor blade and hub loads. The absorber is used to introduce damping into the lag mode of the rotor blade through strong Coriolis coupling. The rotor blade is modeled as an elastic beam undergoing flap and lag bending, with the absorber modeled as a discrete mass restrained by a damped spring, moving in the spanwise direction within the rotor blade. Results indicate that the addition of the absorber does not detrimentally affect the blade spanwise and root loads and vibratory hub loads.