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Bhuddi, Ajit; Gobert, Marie-Laure; Mencik, Jean-Mathieu

On the acoustic radiation of axisymmetric fluid-filled pipes using the wave finite element (WFE) method. (English) Zbl 1360.76125

J. Comput. Acoust. 23, No. 3, Article ID 1550011, 34 p. (2015).
Summary: This paper investigates the efficiency of the wave finite element (WFE) method to assess the vibroacoustic behavior of finite baffled axisymmetric elastic pipes interacting with internal and external acoustic fluids. The pipes, of either homogeneous or multi-layered cross-sections, are surrounded by an external fluid of infinite extent, which can be light or heavy. The Sommerfeld radiation condition is taken into account by considering a perfectly matched layer (PML) around the external fluid. The method involves the computation of waves traveling along an axisymmetric multi-physics waveguide that incorporates a pipe, internal and external fluids, as well as a PML. Numerical experiments are carried out which highlight the relevance of the WFE method in terms of accuracy and CPU time savings, in comparison with the conventional finite element analysis.

Cited in 3 Documents

MSC:

76M10 Finite element methods applied to problems in fluid mechanics
76Q05 Hydro- and aero-acoustics

Keywords:

wave finite element method; fluid-structure interaction; acoustic radiation; perfectly matched layer; mid-frequencies
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References:

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