2 Hub Vibratory L oad Optimization
T he hub vibratory loads can be obtained by
the given aeroelastic response analysis. T he force
integral is used to form blade root force f rom dis
t ributed components in rotating coordinat s, and
transferred to t he nonrotating system as hub
loads. In t his paper t he N / rev vibratory hub
loads, w hich are t he determinant component s for
rotor vibration reduction, are calculated and then
optimized.