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Dynamic Aeroelasticity studies the interactions among aerodynamic, elastic, and inertial forces. Examples of dynamic aeroelastic phenomena are:
FlutterFlutter is a self-starting vibration that occurs when a lifting surface bends under aerodynamic load. Once the load reduces, the deflection also reduces, restoring the original shape, which restores the original load and starts the cycle again. In extreme cases the elasticity of the structure means that when the load is reduced the structure springs back so far that it overshoots and causes a new aerodynamic load in the opposite direction to the original. Even changing the mass distribution of an aircraft or the stiffness of one component can induce flutter in an apparently unrelated aerodynamic component. At its mildest this can appear as a "buzz" in the aircraft structure, but at its most violent it can develop uncontrollably with great speed and cause serious damage to or the destruction of the aircraft. The following link [[1]] shows a visual demonstration of flutter which destroys an RC aircraft.
Flutter can also occur on structures other than aircraft. One famous example of flutter phenomena is the collapse of the Tacoma Narrows Bridge.
http://en.wikipedia.org/wiki/Aeroelasticity
Columbus Townhall > Forum > Politics > National > Science and Environment (Moderators: Peter, CTH Public Relations)
Topic: Aeroelastic Flutter
