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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2019030563
pages 195-209

SHIMMY ANALYSIS OF AIRCRAFT MULTI-WHEEL LANDING GEAR

Vitalii Dmitrievich Chuban
Irkut Corporation, 68, Leningradsky Prospect, Moscow, 125315, Russia

SINOPSIS

A method of shimmy analysis of a multi-wheel landing gear without a shimmy damper is proposed based on using the free vibration frequencies and modes of the gear leg at the wheel axis points. It is proposed to use the finite-element method to obtain the frequencies and modes of the natural oscillations of the landing gear leg. The proposed method allows obtaining a more precise model of the elastic link of the multi-wheel landing gear between an aircraft and the ground. Application of the method is illustrated by symmetrical two-wheel landing gear leg shimmy computations. It is shown that in this particular case the proposed method yields the same results as the design guide. As a practical example, the shimmy analysis of the main landing gear of a passenger aircraft is considered.

REFERENCIAS

  1. Keldysh, M.V., Shimmy of the nose wheel of a three-wheel landing gear, Trudy TsAGI, 564:1-34, 1945.

  2. Goncharenko, V.I., Shimmy of nose gear on an asymmetric suspension, Int. Appl. Mech., 33(2):168-173, 1997.

  3. Gozdek, V.S., Handbook for Designers, vol. III, book 6, no. 2, Trudy TsAGI, pp. 1-23, 1977 (in Russian).

  4. Krapivko, A.V., Shimmy of wheels, in Encyclopedia, vol. IV-21, book 1, pp. 655-662, Moscow: Mashinostroenie, 2002 (in Russian).

  5. Krapivko, A.V., To development of numerical methods of investigation of airplane safety from shimmy of wheels of landing gear legs, Trudy TsaGI, 2727:1-23 2013.

  6. Howcroft, C., Krauskopf, B., Lowenberg, M.H., and Neild, S.A., Influence of variable side-stay geometry on the shimmy dynamics of an aircraft dual-wheel main landing gear, SIAM J. Appl. Dyn. Syst., 12(3):1181-1209, 2013.

  7. Besselink, I.J.M., Shimmy of aircraft main landing gears, Delft University of Technology, Delft, Netherlands, 2000.

  8. Pacejka, H.B., Tire and Vehicle Dynamics, 2nd ed., Oxford: Elsevier, 2006.

  9. Chuban, V.D., Shimmy analysis of light airplane main landing gear, TsAGI Sci. J., 48(7):665-672, 2017.


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