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Nitsche-XFEM for pressure jump interface condition in vibro-acoustic problems in presence of porous materials

Abstract : We present a variational formulation based on the idea of Nitsche's method to account for thin layers in acoustic problems. Pressure jump model of robin-type condition is used to model the effects of thin acoustic layers. The computational domain is discretized using eXtended Finite Element Method (X-FEM) to represent the discontinuity in the elements and to mitigate the meshing restriction for complex geometry of interfaces. The porous materials with complex-valued propertis are also considered in current work, which introduce an energy dissipation in the system.
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https://hal.archives-ouvertes.fr/hal-03671873
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Submitted on : Wednesday, May 18, 2022 - 9:59:39 PM
Last modification on : Saturday, June 25, 2022 - 3:53:07 AM

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Shaoqi Wu, Grégory Legrain, Olivier Dazel. Nitsche-XFEM for pressure jump interface condition in vibro-acoustic problems in presence of porous materials. CSMA 2022 15e Colloque National en Calcul des Structures, May 2022, Giens, France. ⟨hal-03671873⟩

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