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A parametric study of harmonic rotor hub loadsA parametric study of vibratory rotor hub loads in a nonrotating system is presented. The study is based on a CAMRAD/JA model constructed for the GBH (Growth Version of Blackhawk Helicopter) Mach-scaled wind tunnel rotor model with high blade twist (-16 deg). The theoretical hub load predictions are validated by correlation with available measured data. Effects of various blade aeroelastic design changes on the harmonic nonrotating frame hub loads at both low and high forward flight speeds are investigated. The study aims to illustrate some of the physical mechanisms for change in the harmonic rotor hub loads due to blade design variations.
Document ID
19940020253
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
He, Chengjian (Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1993
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NAS 1.26:4558
NASA-CR-4558
Report Number: NAS 1.26:4558
Report Number: NASA-CR-4558
Accession Number
94N24726
Funding Number(s)
CONTRACT_GRANT: NAS1-19000
PROJECT: RTOP 505-63-36
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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