Bifurcation analysis of nose landing gear shimmy with lateral and longitudinal bending

P Thota, B Krauskopf, MH Lowenberg

Research output: Working paperWorking paper and Preprints

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Abstract

We develop and study a model of an aircraft nose landing gear with torsional, lateral and longitudinal degrees of freedom. The corresponding three modes are coupled in a nonlinear fashion via the geometry of the landing gear in the presence of a nonzero rake angle, as well as via the nonlinear tyre forces. Their interplay may lead to different types of shimmy oscillations as a function of the forward velocity and the vertical force on the landing gear. Methods from nonlinear dynamics, especially numerical continuation of equilibria and periodic solutions, are used to asses how the three modes contribute to different types of shimmy dynamics. We conclude that the longitudinal mode does not actively participate in the nose landing gear dynamics over the entire range of forward velocity and vertical force.
Original languageEnglish
Publication statusPublished - 2009

Bibliographical note

Additional information: Preprint of an article due to be published in the Journal of Aircraft by the American Institute of Aeronautics and Astronautics

Sponsorship: Airbus

Keywords

  • bifurcation analysis
  • shimmy
  • mode interaction
  • nose landing gear

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