AEROELASTIC ANALYSIS OF MULTIBLADED HINGELESS ROTORS IN HOVER

The coupled flap-lag-torsion aeroelastic response and stability of multibladed hingeless rotors in the hovering flight condition are investigated. The vortex lattice method, with a three-dimensional prescribed wake geometry, is used for the prediction of unsteady airloads of multibladed rotors undergoing disturbed dynamic motions. Interblade unsteady wake effects due to vortex-phasing phenomena beneath a rotor are numerically calculated by the phase control of wake vortices shed from each blade. The aeroelastic equations of motion of the rotor blade are formulated using a finite element beam model that has no artificial restrictions on the magnitudes of displacements and rotations due to the degree of nonlinearity. Numerical results of the steady equilibrium deflections and the lead-lag damping and frequency are presented for two-, three-, and four-bladed stiff-inplane rotors, and are compared with those obtained from a two-dimensional quasisteady strip theory with steady and uniform inflow.
Publisher
AMER INST AERONAUT ASTRONAUT
Issue Date
1995-12
Language
ENG
Keywords

STABILITY; BLADES

Citation

AIAA JOURNAL, v.33, no.12, pp.2348 - 2353

ISSN
0001-1452
URI
http://hdl.handle.net/10203/6257
Appears in Collection
AE-Journal Papers(저널논문)
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