EFFECTS OF EXTERNALLY MOUNTED STORES ON AEROELASTICITY OF ADVANCED SWEPT CANTILEVERED AIRCRAFT WINGS

In this paper, the static aeroelastic response and flutter instability of straight/swept aircraft wings carrying external stores along their span and at their tip are investigated. In this context, a comprehens ive structural model for the aircraft wing is used which incorporates flexibility in transverse shear, anisotropy, and warping effects. The relevant equations of motion as well as the appropriate boundary condi tions are obtained via Hamilton's Variational Principle acid applicati on of generalized function theory in order to exactly consider the spa nwise location and properties of the attached stores. To achieve a rea listic representation of the store influence upon static and dynamic a eroelastic behavior of the system, static weights and dynamic inertias of the attached stores have been modelled. The obtained eigenvalue/bo undary value problems are being solved by application of the Extended Galerkin Method. Comparisons with the very few results highlighting th e effects of underwing and tip stores on flutter instability are carri ed out and excellent agreements with the present predictions are repor ted. (C) Elsevier, Paris.