The influence of time dependent flight and maneuver velocities and elastic or viscoelastic flexibilities on aerodynamic and stability derivatives

Abstract

A variety of models describing the interaction between flows and oscillating structures are discussed. The main aim is to analyze conditions under which structural instability ({\em flutter}) induced by a  fluid flow can be suppressed or eliminated.
The analysis provided  focuses on  effects  brought about by:  (i) different plate and fluid boundary conditions, (ii) various regimes for flow velocities: subsonic, transonic, or supersonic, (iii) different modeling of the structure which may or may not account for in-plane accelerations (full von Karman system), (iv) viscous effects, (v) an assortment of models related to piston-theoretic model reductions, and (iv) considerations of axial flows (in contrast to so called normal flows). \\ The discussion below is based on conclusions reached via  a combination of rigorous PDE analysis, numerical computations, and experimental trials.