Limit Cycle Oscillations of a Cantilevered Wing in Low Subsonic Flow

Abstract

A nonlinear, aeroelastic analysis of a low-aspect, rectangular wing modeled as a plate of constant thickness demonstratesthatlimitcycleoscillationsoftheorderoftheplatethicknessarepossible.Thestructuralnonlinearity arisesfrom doublebendinginboth thechordwiseand spanwisedirections.Thepresentresultsusing a vortex lattice aerodynamic model for low-Mach-numbere owscomplementearlierstudiesforhigh supersonicspeed thatshowed similar qualitative results. Also, the theoretical results are consistent with experimental data reported by other investigators for low-aspect-ratio delta wings.