NASA STI Repository (National Aeronautics and Space Administration) · 1988 · 11 citations · 0 references
Open access
EngineeringAerospace EngineeringMechanical EngineeringAerodynamicsAeroelasticityStructural DynamicsAeroelastic ModelingAeroelastic StabilityDynamic AeroelasticityNonlinear AeroelasticityRotorcraft StructuresRotordynamicsAeroelastic Stability AnalysisCantilever MechanicsDynamic Aeroelastic StabilityFlight TestingNonlinear Aeroelastic StabilityRotor Blade Structural DynamicsRotorcraft StabilityWind-tunnel Aeroelastic Testing
Theoretical and experimental developments in the aeroelastic and aeromechanical stability of helicopters and tilt-rotor aircraft are addressed. Included are the underlying nonlinear structural mechanics of slender rotating beams, necessary for accurate modeling of elastic cantilever rotor blades, and the development of dynamic inflow, an unsteady aerodynamic theory for low frequency aeroelastic stability applications. Analytical treatment of isolated rotor stability in hover and forward flight, coupled rotor-fuselage stability are considered. Results of parametric investigations of system behavior are presented, and correlations between theoretical results and experimental data from small- and large-scale wind tunnel and flight testing are discussed.