Accession Number : ADA134547

Title :   Effect of Blade Structural Parameters on Helicopter Vibrational Characteristics.

Descriptive Note : Technical rept. no. 3 (Final), 1 Mar 77-31 Aug 83,

Corporate Author : WASHINGTON UNIV ST LOUIS MO DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Peters,David A

PDF Url : ADA134547

Report Date : Oct 1983

Pagination or Media Count : 87

Abstract : This final report covers 6 1/2 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 Rotor/Airframe 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.

Descriptors :   Vibration, *Helicopter rotors, *Rotor blades(Rotary Wings), Structural properties, Airframes, Helicopters, Coupling(Interaction), Oscillation, Mathematical models, Impedance matching, Stalling, Eigenvalues, Aerodynamic loading, Trim(Aerodynamics), Reprints

Subject Categories : Helicopters
      Fluid Mechanics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE