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Random dynamics of a structurally nonlinear airfoil in turbulent flow

McGill University
Publication Date
  • Engineering
  • Aerospace.
  • Mathematics


For the nonlinear airfoil, it is the vertical component of turbulence that determines the essential features of the stochastic bifurcation and the qualitative characteristics of the response. The interplay between turbulence and nonlinear stiffness has a significant impact on the probability structure of the aeroelastic response. Uni-, bi- and double bi-modal distributions are observed, and found to occur at different airspeeds depending on which state variable is considered. Furthermore, the spectral content displays noise-controlled, and noise-induced, time scales.

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