What is aeroelasticity?
Aeroeelasticity is a study of interaction of aerodynamic tension, inertia and elastic reactions in physical structures. Such interactions can cause static and dynamic reactions. Unstable dynamic reactions in components may lead to structural failure under certain conditions. Aeroelasticity usually deals with designing structures that are stable if they are subjected to dynamic air flow. These structures are often aircraft, but can also include bridges, wind turbines and other land -based elements.
Most of the materials, including metals, show elastic behavior in response to external voltage. Elastic materials return to their original size and shape unless they are deformed for a critical amount. During deformation, they stretch or decrease according to the voltage level. The metal spring stretches when it is pulled on the edges, but does not remain permanently deformed after release. In fact, even solid pieces are in this way.
in the plane, the outer aerodesNamice forces apply mechanical tension to the wings and the main body. Regarding aeroeelasticity, this voltage is similar to the voltage applied directly to the material - for example, from the location of weights on the aircraft. In response, the structure of the aircraft slightly deforms. This changes the shape of the plane slightly, which in turn affects the exact aerodynamic tension. In a static scenario, the structural response of the aircraft will achieve a balance with a new aerodynamic tension.
When the structure begins to deform due to aerodynamic tension, it gains inertia or momentum because it moves to change shape. Once it reaches its new "equilibrium" position, it does not stop immediately; Rather, it will exceed this position because it has gained inertia. Aerodynamic tensions may tend to restore thstructure to equilibrium shape, but sometimes oscillation may occur. It requires friction or some kind of strength damping to slow this oscillation. By others withHunting, structure can have a balance shape, but if it raises too much inertia every time it moves to this shape, it will be in an unstable balance.
Many people witnessed this important aspect of aeroelasticity 7. November 1940, when Tacoma Narrows Bridge in the US state in Washington began to vibrate because of the high wind. The natural frequency of the bridge that is related to how quickly the bridge will vibrate has become similar to the speed that the wind has changed directions. When this happens, the wind can cause the bridge to vibrate more and more. In the case of the Tacoma Narrows bridge led the escape structural vibration to the destruction of the bridge. This event has led to an increase in the interest and research of aeroeelasticity.