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http://dx.doi.org/10.5050/KSNVE.2012.22.8.784

Hub Parametric Investigation of Main Rotor Stability of Bearingless Helicopter  

Yun, Chul-Yong (한국항공우주연구원 회전익기술팀)
Kee, Young-Jung (한국항공우주연구원 회전익기술팀)
Kim, Tae-Joo (한국항공우주연구원 회전익기술팀)
Kim, Deog-Kwan (한국항공우주연구원 회전익기술팀)
Kim, Seung-Ho (한국항공우주연구원 회전익기술팀)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.22, no.8, 2012 , pp. 784-790 More about this Journal
Abstract
This paper describes a stability and dynamic characteristics of bearingless helicopter main rotor in hover. Baseline rotor configuration is defined and modal analysis for the configuration is taken to verify the dynamic characteristics. The kinematic pitch-lag couplings through ways of pitch link installation are analyzed to know effects on loads, frequencies and stability. The effects of pitch link attachments in spanwise direction and chordwise direction as well as pitch link inclination on thrust, power, flpa-lag-pitch mode frequencies and inplane damping are examined. Pitch link at trailing edge location in chordwise direction has influence on aeroelastic stability of the rotor. Also, the pitch link with negative inclination angle makes inplane damping increase.
Keywords
Bearingless Rotor; Stability; Lag Mode Damping; Pitch Link Attachment;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Helmut Huber, 1992, Will Rotor Hubs Lose Their Bearingls, A Survey of Bearingless Main Rotor Development, The 18th European Rotorcraft Forum,
2 Dixon, P. G. C. and Bishop, H. E., 1980, The Bearingless Main Rotor, Journal of the American Helicopter Society, Vol. 25, No. 3, pp. 15-21.   DOI
3 Gandhi, F. and Chopra, I., 1998, An Aeroelastic Analysis Methodology for Bearingless Main Rotor Helicopters, Journal of the American Helicopter Society, Vol. 43, No. 1. pp. 66-75.
4 Johnson, W., 1985, Recent Developments in the Dynamics of Advanced Rotor Systems, NASA TM-86669,
5 Yun, C. Y., Kee, Y. J., Kim, T. J., Kim, D. K. and Kim, S. H., 2012, Ground Resonance Instabilities Analysis of a Bearingless Helicopter Main Rotor, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 22, No. 4, pp. 352-357.   DOI
6 Kee, Y. J., Yun, C. Y., Kim, D. K. and Kim, S. H., 2012, Dynamic Characteristic Analysis of a Bearingless Helicopter Rotor System, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 22, No. 2, pp. 187-192.   DOI
7 Johnson, W., 1980, Helicopter Theory, Princeton University Press, New Jersey.
8 Dawson, S., 1983, An Experimental Investigation on the Stability of a Bearingless Model Rotor in Hover, Journal of the American Helicopter Society, Vol. 28, No. 4. pp. 29-34.