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Aeroelastic analysis for helicopter rotors with blade appended pendulum vibration absorbers. Mathematical derivations and program user's manualMathematical development is presented for the expanded capabilities of the United Technologies Research Center (UTRC) G400 Rotor Aeroelastic Analysis. This expanded analysis, G400PA, simulates the dynamics of teetered rotors, blade pendulum vibration absorbers and the higher harmonic excitations resulting from prescribed vibratory hub motions and higher harmonic blade pitch control. Formulations are also presented for calculating the rotor impedance matrix appropriate to these higher harmonic blade excitations. This impedance matrix and the associated vibratory hub loads are intended as the rotor blade characteristics elements for use in the Simplified Coupled Rotor/Fuselage Vibration Analysis (SIMVIB). Sections are included presenting updates to the development of the original G400 theory, and material appropriate to the user of the G400PA computer program. This material includes: (1) a general descriptionof the tructuring of the G400PA FORTRAN coding, (2) a detaild description of the required input data and other useful information for successfully running the program, and (3) a detailed description of the output results.
Document ID
19820023422
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Bielawa, R. L. (United Technologies Research Center East Hartford, CT, United States)
Date Acquired
September 4, 2013
Publication Date
June 1, 1982
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:165896
UTRC81-45
NASA-CR-165896
Accession Number
82N31298
Funding Number(s)
CONTRACT_GRANT: NAS1-16058
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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