| Autor: |
Sung N. Jung, Young H. You, Benton H. Lau, Wayne Johnson, Joon W. Lim |
| Předmět: |
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| Zdroj: |
Journal of the American Helicopter Society; 2013, Vol. 58, p1-12, 12p |
| Abstrakt: |
The structural properties of Higher Harmonic Aeroacoustic Rotor Test (HART I) blades have been measured using the original set of blades tested in the wind tunnel in 1994. A comprehensive rotor dynamics analysis is performed to address the effect of the measured blade properties on airloads, blade motions, and structural loads of the rotor. The measurements include bending and torsion stiffness, geometric offsets, and mass and inertia properties of the blade. The measured properties are correlated against the estimated values obtained by the manufacturer of the blades. The previously estimated blade properties showed consistently higher stiffnesses, up to 30%for the flap bending in the blade inboard root section. The measured offset between the center of gravity and the elastic axis is larger by about 5%chord length, as compared with the estimated value. A comprehensive rotor dynamics analysis is carried out using the measured blade property set for HART I rotor. A significant improvement in blade motions and structural loads is obtained with the measured blade properties. The location of the center of gravity and the elastic axis and their offset are shown to be the most influential factors for the improved correlation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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