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Open AccessFeature PaperArticle

Computational Vibroacoustics in Low- and Medium- Frequency Bands: Damping, ROM, and UQ Modeling

1
Structural Mechanics and Coupled Systems Laboratory, Conservatoire National des Arts et Metiers (CNAM), 2 rue Conte, 75003 Paris, France
2
Laboratoire Modélisation et Simulation Multi-Echelle (MSME UMR 8208 CNRS), Université Paris-Est, 5 bd Descartes, 77454 Marne-la-Vallée, France
*
Author to whom correspondence should be addressed.
Academic Editors: Roberto Citarella and Luigi Federico
Appl. Sci. 2017, 7(6), 586; https://doi.org/10.3390/app7060586
Received: 10 May 2017 / Revised: 30 May 2017 / Accepted: 3 June 2017 / Published: 7 June 2017
Within the framework of the state-of-the-art, this paper presents a summary of some common research works carried out by the authors concerning computational methods for the prediction of the responses in the frequency domain of general linear dissipative vibroacoustics (structural-acoustic) systems for liquid and gas in the low-frequency (LF) and medium-frequency (MF) domains, including uncertainty quantification (UQ) that plays an important role in the MF domain. The system under consideration consists of a deformable dissipative structure, coupled with an internal dissipative acoustic fluid including a wall acoustic impedance, and surrounded by an infinite acoustic fluid. The system is submitted to given internal and external acoustic sources and to prescribed mechanical forces. An efficient reduced-order computational model (ROM) is constructed using a finite element discretization (FEM) for the structure and the internal acoustic fluid. The external acoustic fluid is treated using a symmetric boundary element method (BEM) in the frequency domain. All the required modeling aspects required for the analysis in the MF domain have been introduced, in particular the frequency-dependent damping phenomena and model uncertainties. An industrial application to a complex computational vibroacoustic model of an automobile is presented. View Full-Text
Keywords: structural acoustics; vibroacoustic; uncertainty quantification; reduced-order model; medium frequency; low frequency; dissipative system; wall acoustic impedance; finite element discretization; boundary element method structural acoustics; vibroacoustic; uncertainty quantification; reduced-order model; medium frequency; low frequency; dissipative system; wall acoustic impedance; finite element discretization; boundary element method
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MDPI and ACS Style

Ohayon, R.; Soize, C. Computational Vibroacoustics in Low- and Medium- Frequency Bands: Damping, ROM, and UQ Modeling. Appl. Sci. 2017, 7, 586. https://doi.org/10.3390/app7060586

AMA Style

Ohayon R, Soize C. Computational Vibroacoustics in Low- and Medium- Frequency Bands: Damping, ROM, and UQ Modeling. Applied Sciences. 2017; 7(6):586. https://doi.org/10.3390/app7060586

Chicago/Turabian Style

Ohayon, Roger; Soize, Christian. 2017. "Computational Vibroacoustics in Low- and Medium- Frequency Bands: Damping, ROM, and UQ Modeling" Appl. Sci. 7, no. 6: 586. https://doi.org/10.3390/app7060586

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