Patch Transfer Functions as a Tool to Couple Linear Acoustic Problems

Ouisse, Morvan; Maxit, Laurent; Cacciolati, C.; Guyader, Jean‐Louis

doi:10.1115/1.2013302

Cited by 55 publications

(57 citation statements)

References 8 publications

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“…In order to facilitate the modeling of the overall system involving such devices, a cavity-backed MPP can be regarded as a standalone subsystem. Once the acoustic property is known in terms of PTFs over its surface, it can be integrated into the conventional PTF framework, 12 such providing an alternative to the direct formulation presented in Sec. III B 1.…”

Section: Equivalent Ptfs For a Cavity-backed Mppmentioning

confidence: 99%

“…The size of the patches should be less than the half-wavelength (i.e., k/2) corresponding to the highest frequency of interest, either acoustic or structural, whichever is less. 12,14 The PTFs are defined for each subsystem, with all quantities being defined with respect to the unit normal vectorñ to the coupling surface S c . For the structure, a constant normal force f s i is prescribed on patch i, whereas no force is prescribed on the other patches.…”

Section: Principle Of Ptf Approachmentioning

confidence: 99%

“…These calculations have been developed and validated for different applications. [12][13][14] The method, however, has not been used to treat a MPP element, as it cannot be categorized into any of the existing conventional subsystems. It should be noted that, calculations of PTFs are performed beforehand for each subsystem separately.…”

Section: Introductionmentioning

confidence: 99%

“…PTF (Ref. 12) is a substructuring approach that allows assembling different vibro-acoustic subsystems through coupled surfaces. In the present case, the global system is divided into different subsystems as shown on Fig.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of micro-perforated panels in a complex vibro-acoustic environment using patch transfer function approach

Maxit

Yang

et al. 2012

The Journal of the Acoustical Society of America

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A micro-perforated panel (MPP) with a backing cavity is a well known device for efficient noise absorption. This configuration has been thoroughly studied in the experimental conditions of an acoustic tube (Kundt tube), in which the MPP is excited by a normal incident plane wave in one dimension. In a more practical situation, the efficiency of MPP may be influenced by the vibro-acoustic behavior of the surrounding systems as well as excitation. To deal with this problem, a vibro-acoustic formulation based on the patch transfer functions (PTF) approach is proposed to model the behavior of a micro-perforated structure in a complex vibro-acoustic environment. PTF is a substructuring approach, which allows assembling different vibro-acoustic subsystems through coupled surfaces. Upon casting micro-perforations and the flexibility of the MPP under transfer function framework, the proposed PTF formulation provides explicit representation of the coupling between subsystems and facilitates physical interpretation. As an illustration example, application to a MPP with a backing cavity located in an infinite baffle is demonstrated. The proposed PTF formulation is finally validated through comparison with experimental measurements available in the literature.

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Section: Equivalent Ptfs For a Cavity-backed Mppmentioning

confidence: 99%

Section: Principle Of Ptf Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of micro-perforated panels in a complex vibro-acoustic environment using patch transfer function approach

Maxit

Yang

et al. 2012

The Journal of the Acoustical Society of America

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“…The patch-mobility method (PMM), which is used to couple acoustic linear problems, is presented by Ouisse et al (2005). It allows one to consider several acoustic subsystems, coupled through surfaces divided into elementary areas called patches.…”

Section: Patch-mobility Approachmentioning

confidence: 99%

Recent Advances in the Sound Insulation Properties of Bio-based Materials

Zhu¹,

Kim²,

Wang³

et al. 2013

BioResources

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Many bio-based materials, which have lower environmental impact than traditional synthetic materials, show good sound absorbing and sound insulation performances. This review highlights progress in sound transmission properties of bio-based materials and provides a comprehensive account of various multiporous bio-based materials and multilayered structures used in sound absorption and insulation products. Furthermore, principal models of sound transmission are discussed in order to aid in an understanding of sound transmission properties of bio-based materials. In addition, the review presents discussions on the composite structure optimization and future research in using co-extruded wood plastic composite for sound insulation control. This review contributes to the body of knowledge on the sound transmission properties of bio-based materials, provides a better understanding of the models of some multiporous bio-based materials and multilayered structures, and contributes to the wider adoption of bio-based materials as sound absorbers.

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Discussion About Different Methods for Introducing the Turbulent Boundary Layer Excitation in Vibroacoustic Models

Maxit

Berton

Audoly³

et al. 2014

Flinovia - Flow Induced Noise and Vibration Issues and Aspects

Self Cite

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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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Patch Transfer Functions as a Tool to Couple Linear Acoustic Problems

Cited by 55 publications

References 8 publications

Modeling of micro-perforated panels in a complex vibro-acoustic environment using patch transfer function approach

Modeling of micro-perforated panels in a complex vibro-acoustic environment using patch transfer function approach

Recent Advances in the Sound Insulation Properties of Bio-based Materials

Discussion About Different Methods for Introducing the Turbulent Boundary Layer Excitation in Vibroacoustic Models

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