International Journal of Aeronautical and Space Sciences

  • 제8권1호
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  • Pages.115-121
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  • 2007
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  • 2093-274X(pISSN)
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  • 2093-2480(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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Aeroelastic Characteri stics of Rotor Blades with Trailing Edge Flaps

  • Lim, In-Gyu (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Lee, In (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 발행 : 2007.06.30
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초록

The aeroelastic analysis of rotor blades with trailing edge flaps, focused on reducing vibration while minimizing control effort, are investigated using large deflection-type beam theory in forward flight. The rotor blade aerodynamic forces are calculated using two-dimensional quasi-steady strip theory. For the analysis of forward flight, the nonlinear periodic blade steady response is obtained by integrating the full finite element equation in time through a coupled trim procedure with a vehicle trim. The objective function, which includes vibratory hub loads and active flap control inputs, is minimized by an optimal control process. Numerical simulations are performed for the steady-state forward flight of various advance ratios. Also, numerical results of the steady blade and flap deflections, and the vibratory hub loads are presented for various advance ratios and are compared with the previously published analysis results obtained from modal analysis based on a moderate deflection-type beam theory.

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참고문헌

  1. Rosen, A. and Friedmann, P. P., 1979, 'The nonlinear behavior of elastic slender straight beams undergoing small strains and moderate rotations'. ASME Journal of Applied Mechanics, Vol. 46, No.1, pp. 161-168 https://doi.org/10.1115/1.3424490
  2. Hodges, D. H. and Dowell, E. H., 1974, 'Nonlinear equations of motion for elastic bending and torsion of twisted non-uniform rotor blades', NASA TN D-7818
  3. Jeon, S. M. and Lee, I., 2001, 'Aeroelastic response and stability analysis of composite rotor blades in forward flight', Composites: Part E, Vol. 32, pp. 249-257 https://doi.org/10.1016/S1359-8368(00)00061-5
  4. Lim, I. G. and Lee, I., 2007, 'Aeroelastic analysis of bearingless rotors using large deflection beam theory'. AIAA J., Vol. 45, No.3, pp. 599 - 606 https://doi.org/10.2514/1.26635
  5. Friedmann, P. P., 1991, 'Helicopter vibration reduction using structural optimization with aeroelastic/ multidisciplinary constraints - a survey', Journal of Aircraft, Vol. 28, No. 1, pp. 8-21 https://doi.org/10.2514/3.45987
  6. Pearson, J. T., Goodall, R. M., and Lyndon, I., 1994, 'Active control of helicopter vibration,' Computing & Control Engineering Journal, Vol. 5, No.6, pp. 277-284 https://doi.org/10.1049/cce:19940608
  7. Nguyen, K. and Chopra, I., 1990, 'Application of higher harmonic control to rotor operating at high speed and thrust', Journal of the American Helicopter Society, Vol. 35, No.3, pp. 78-89 https://doi.org/10.4050/JAHS.35.78
  8. Viswamurthy, S. R. and Ganguli, R., 2006, 'Effect of piezoelectric hysteresis on helicopter vibration control using trailing edge flaps', Journal of Guidance, Control, and Dynamics, Vol. 29, No.5, pp. 1201-1209 https://doi.org/10.2514/1.17655
  9. Milgram, J H., Chopra, I. and Straub, F., 1998, 'Rotor with trailing edge flaps: analysis and comparison with experimental data', Journal of the American Helicopter Society, Vol. 43, No. 4, pp. 319-332 https://doi.org/10.4050/JAHS.43.319
  10. Straub, F. K. and Charles, B. D., 2001, 'Aeroelastic analysis of rotors with trailing edge flaps using comprehensive codes', Journal of the American Helicopter Society, Vol. 46, No.3, pp. 192-199 https://doi.org/10.4050/JAHS.46.192
  11. Shen, J and Chopra, I., 2003, 'Aeroelastic stability of trailing-edge flap helicopter rotors', Journal of the American Helicopter Society, Vol. 48, No.4, pp. 236-243 https://doi.org/10.4050/JAHS.48.236
  12. Zhang, J, Smith, E. C. and Wang, K. W., 2004, 'Active passive hybrid optimization of rotor blades with trailing edge flaps', Journal of the American Helicopter Society, Vol. 49, No.1, pp. 54-65 https://doi.org/10.4050/JAHS.49.54
  13. Greenberg, J M., 1947, 'Airfoil in Sinusoidal Motion in a Pulsating Stream', NACA TN-1326
  14. Johnson, W., 1982, 'Self-tuning regulators for multicyclic control of helicopter vibration', NASA TP-1996