Bifurcation-based shimmy analysis of landing gears using flexible multibody models

C. J.J. Beckers, A. E. Öngüt, G. Verbeek, R. H.B. Fey, Y. Lemmens, N. van de Wouw

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientific

2 Citations (Scopus)

Abstract

Shimmy oscillations are undesired vibrations in aircraft landing gears. In this chapter, the onset of shimmy vibrations, marked by Hopf bifurcations, is investigated in the parameter space of high-fidelity, flexible multibody landing gear models. Such a bifurcation analysis is performed by combining the Virtual.Lab Motion multibody solver with the numerical continuation software AUTO. The resulting quasi-2-parameter bifurcation diagrams, involving aircraft velocity and normal load, are verified using conventional time-simulation methods and are shown to be computationally more efficient. A sensitivity study reveals the influence of design parameters, such as the shimmy damping coefficient, mechanical trail, and steering actuator stiffness, on the occurrence of shimmy.

Original languageEnglish
Title of host publicationNonlinear Structural Dynamics and Damping
EditorsJuan Carlos Jauregui
Place of PublicationCham, Switzerland
PublisherSpringer
Pages261-291
ISBN (Electronic)978-3-030-13317-7
ISBN (Print)978-3-030-13316-0
DOIs
Publication statusPublished - 2019

Publication series

NameMechanisms and Machine Science
Volume69
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

Keywords

  • Bifurcation analysis
  • Flexible multibody dynamics
  • Landing gear dynamics
  • Shimmy

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