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Aeroelastic characteristics of composite bearingless rotor bladesOwing to the inherent unique structural features of composite bearingless rotors, various assumptions upon which conventional rotor aeroelastic analyses are formulated, are violated. Three such features identified are highly nonlinear and time-varying structural twist, structural redundancy in bending and torsion, and for certain configurations a strongly coupled low frequency bending-torsion mode. An examination of these aeroelastic considerations and appropriate formulations required for accurate analyses of such rotor systems is presented. Also presented are test results from a dynamically scaled model rotor and complementary analytic results obtained with the appropriately reformulated aeroelastic analysis.
Document ID
19770044016
Document Type
Conference Proceedings
Authors
Bielawa, R. L.
(United Technologies Research Center East Hartford, Conn., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Structural Mechanics
Meeting Information
Annual National Forum of the American Helicopter Society(Washington, DC)
Funding Number(s)
CONTRACT_GRANT: NAS1-10960
Distribution Limits
Public
Copyright
Other
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