Aeroelastic Stability of Plates in 3-D Flows

Speaker: 
S. Chad Gibbs
Date of Seminar: 
Thu, 2011-02-17 06:45
Semester & Year: 
Spring 2012
Seminar Location: 
Hudson 216
Seminar Contact(s): 
Chad Gibbs: scg8@duke.edu
Special Instructions: 
Lunch will be provided between 11:45AM and the beginning of the seminar at noon

This presentation will outline the aeroelastic stability of rectangular plate with a single edge clamped as structural parameters and flow configurations are varied. A 3-D vortex lattice model is used to capture the aerodynamics. The vortex lattice model allows for the modeling of the wake left behind by the oscillating structure as well as three dimensional aerodynamic effects. This aerodynamic model is coupled with a structural model derived using energy methods. The aeroelastic eigenvalues determine the aeroelastic stability of the system as the flow velocity changes. The aeroelastic model was solved for a varying parameters and flow configurations to determine flutter boundaries in parameter space. Further study was conducted on a model that included torsional springs to model a transition in boundary conditions between pinned and clamped boundary conditions. Finally, experiments are used to validate the aeroelastic predictions.