Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

Experimental/theoretical correlation study of nonlinear aeroelasticity for a wing-store model with freeplay

Deman Tanga,*, Peter J. Attarb, Earl H. Dowella
aDuke University, Department of Mechanical Engineering and Materials Science, Durham, NC 27708-0300, USA  bAir Force Research Laboratory, Computational Sciences Branch, Wright-Patterson AFB, OH 45433-7512, USA
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ABSTRACT
A theoretical and experimental correlation study of flutter/limit cycle oscillation (LCO) and also response to a periodic gust excitation is made for a delta wing/store model with freeplay. The quantitative flutter/LCO correlation between the theory and experiment is reasonably good at and near the flutter velocity, but is poor at the higher flow velocities for the von Karman plate structural model. However a higher order structural model used in the present work has improved the correlations at the higher flow velocities.

Keywords:  Aeroelasticity; Freeplay; Flutter; Limit cycle oscillation; Gust response
* Corresponding author. Tel.: +1 919 660 5332; Fax: +1 919 660 8963; E-mail: demant@duke.edu