Effect of Blade Structural Parameters on Helicopter Vibrational Characteristics.
Technical rept. no. 3 (Final), 1 Mar 77-31 Aug 83,
WASHINGTON UNIV ST LOUIS MO DEPT OF MECHANICAL ENGINEERING
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This final report covers 6 12 years of ARO-sponsored research into the fundamental mechanisms of rotor vibrations. This research effort has spanned several areas of vibration analysis including structural coupling, rotor-body interaction, dynamic stall, and the computational problems associated therewith especially rotor trim. The main body of this report consists of reprints of some of the papers written during the reporting period. Topics include Effect of Blade Structural Parameters on Helicopter Vibrational Characteristics Coupled RotorAirframe Vibration Analysis by a Combined Harmonic-Balance, Impedance Matching Method Application of an Analytic Stall Model to Time-History and Eigenvalue Analysis of Rotor Blades and Comparison of Three Numerical Trim Methods for Rotor Air Loads.
- Fluid Mechanics