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Article Dans Une Revue Journal of Sound and Vibration Année : 2019

Schemes for the sound transmission of flat, curved and axisymmetric structures excited by aerodynamic and acoustic sources

Résumé

The paper describes a methodology for computing the sound transmission loss of any flat, curved and cylindrical, homogeneous and periodic structure, under any type of acoustic and/or aerodynamic load. An approximate excitation model is introduced to reproduce uncorrelated and spatially-correlated loads using a wavenumber integration of surface waves. Then, a wave finite element formulation is developed and interfaced with the excitation models in order to cover industrially-relevant case studies. Analytical, numerical and experimental transmission losses are presented for validation purposes. Finite size effects are also taken into account using a spatial windowing and a cylindrical analogy, for curved structures. Different periodic-cell designs are also compared and investigated under turbulent boundary layer and diffuse acoustic field excitations.
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Dates et versions

hal-02419343 , version 1 (19-12-2019)

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F Errico, Mohamed Ichchou, F Franco, S de Rosa, Olivier Bareille, et al.. Schemes for the sound transmission of flat, curved and axisymmetric structures excited by aerodynamic and acoustic sources. Journal of Sound and Vibration, 2019, 456, pp.221-238. ⟨10.1016/j.jsv.2019.05.041⟩. ⟨hal-02419343⟩
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