Wind engineering and vibrations

How to compute the motion of structures interacting with a fluid flow such as atmospheric wind ?

Xavier Amandolese - Pascal Hémon - Emmanuel de Langre

When a flexible structure is submitted to a flow, such as wind, - or, conversely, when the structure moves surrounded by a fluid at rest - it interacts with the fluid according to the action-reaction principle. We speak then of fluid-structure interactions. When the flow is in air, one uses the word aeroelasticity. This is also the case for wind engineering which studies the interactions between the wind and human activities.

We are interested in the behavior of structures which vibrate or oscillate under the action of a flow. Different kind of instabilities can occur, coupled mode flutter, stall flutter which is responsible for the Tacoma bridge collapse, galloping, vortex induced vibrations, turbulence induced vibrations. Numerous domains are concerned, for instance civil engineering, aeronautics, energy, and biomechanics. These research are also useful for the design of new energy harvester systems.

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Several PhD thesis have been succesffully defended at LadHyX on these phenomena : Manzoor (2010), Violette (2009), Lemaitre (2006), Faschinetti (2003), Doaré (2001),
LadHyX is an active member of l'Association de l'Ingénierie du Vent (AIV) the french speaking wind engineering association (Belgium, France, Swizerland). Various industrial contracts are oftenly performed, such as for the erection of the Fondation Louis Vuitton in Paris.