DISCUSSION ABOUT DIFFERENT METHODS FOR INTRODUCING THE TURBULENT BOUNDARY LAYER EXCITATION IN VIBROACOUSTIC MODELS - Archive ouverte HAL Accéder directement au contenu
Chapitre D'ouvrage Année : 2014

DISCUSSION ABOUT DIFFERENT METHODS FOR INTRODUCING THE TURBULENT BOUNDARY LAYER EXCITATION IN VIBROACOUSTIC MODELS

Laurent Maxit
Marion Berton
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Christian Audoly
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Résumé

For controlling the noise radiated from vibrating structures excited by turbulent boundary layer (TBL) it is relevant to develop numerical tools for understanding how the structure reacts to TBL excitation. Usually, the wall pressure fluctuations of the TBL are described through statistical quantities (i.e. space-frequency or wavenumber-frequency spectra) which depend on the TBL parameters. On the other hand, the vibro-acoustic models (i.e. Finite Elements, Boundary Elements, Transfer Matrix Methods, Analytical models, etc) evaluate deterministic transfer functions which characterise the response of the considered structures. The first part of this paper focuses on the coupling between the stochastic TBL and the deterministic vibro-acoustic models. Five techniques are presented. Numerical applications on an academic marine test case are proposed in order to discuss the calculation parameters and the interests / drawbacks of each technique. In the second part of the paper, the high frequency modelling with the Statistical Energy Analysis (SEA) method is considered. The focus is placed on the estimation of an important input of this method: the injected power by the TBL into the structure for each third octave band.
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Dates et versions

hal-02121058 , version 1 (06-05-2019)

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Laurent Maxit, Marion Berton, Christian Audoly, Daniel Juvé. DISCUSSION ABOUT DIFFERENT METHODS FOR INTRODUCING THE TURBULENT BOUNDARY LAYER EXCITATION IN VIBROACOUSTIC MODELS. Flinovia - Flow Induced Noise and Vibration Issues and Aspects, 2014. ⟨hal-02121058⟩
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