Resumo

CORREA, S  e  MILITELLO, C. Three Nodes Acoustic Element for Fluid-Structure Interaction Based on a Parameterized Variational Principle. Ing. invest. y tecnol. [online]. 2011, vol.12, n.4, pp. 453-460. ISSN 1405-7743.

This article presents a finite element formulation based on a parameterized variational principle for solving plane problems of fluid-structure interaction using the displacements as state variable for both solid and fluid media. The circular spurious modes, typical of displacement formulations are avoided. The penalty parameter is not random because it is selected according to energy criterion. Finally the formulation is not sensible to the definition of the normal direction in the fluid-structure interface.

Palavras-chave : finite elements; fluid-structure interaction; linear element; displacement based formulation; spurious modes; penalty method.