Convergence acceleration using the residual shape technique when solving structure–acoustic coupling with the Patch Transfer Functions method

Aucejo, Mathieu; Maxit, Laurent; Totaro, Nicolas; Guyader, Jean‐Louis

doi:10.1016/j.compstruc.2010.02.010

Cited by 24 publications

(24 citation statements)

References 21 publications

(27 reference statements)

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“…2 have been formulated accordingly, which include flexible plate mobility Y p (Appendix A), equivalent aperture mobility Y a [Eq. (8)], and MPP mobility Y mpp [Eq. (13)].…”

Section: Formulationmentioning

confidence: 99%

Modeling vibroacoustic systems involving cascade open cavities and micro-perforated panels

Guyader

2014

The Journal of the Acoustical Society of America

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While the structural-acoustic coupling between flexible structures and closed acoustic cavities has been extensively studied in the literature, the modeling of structures coupled through open cavities, especially connected in cascade, is still a challenging task for most of the existing methods. The possible presence of micro-perforated panels (MPPs) in such systems adds additional difficulties in terms of both modeling and physical understanding. In this study, a sub-structuring methodology based on the Patch Transfer Function (PTF) approach with a Compound Interface treatment technique, referred to as CI-PTF method, is proposed, for dealing with complex systems involving cascade open/closed acoustic cavities and MPPs. The co-existence of apertures and solid/flexible/micro-perforated panels over a mixed separation interface is characterized using a compound panel subsystem, which enhances the systematic coupling feature of the PTF framework. Using several typical configurations, the versatility and efficiency of the proposed method is illustrated. Numerical studies highlight the physical understanding on the behavior of MPP inside a complex vibroacoustic environment, thus providing guidance for the practical design of such systems.

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“…2 have been formulated accordingly, which include flexible plate mobility Y p (Appendix A), equivalent aperture mobility Y a [Eq. (8)], and MPP mobility Y mpp [Eq. (13)].…”

Section: Formulationmentioning

confidence: 99%

Modeling vibroacoustic systems involving cascade open cavities and micro-perforated panels

Guyader

2014

The Journal of the Acoustical Society of America

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“…Writing the continuity conditions at the coupling interface allows us to assemble the two parts. The particularity of the present model compared to [17,18] is that the fluid added mass effect is taken into account through the "wet modal frequencies" (which are estimated by assuming the fluid incompressible) instead of using the imaginary part of the acoustic impedance of the fluid domain. This permits to overcome the convergence issue evoked in [18] concerning the patch size criterion.…”

Section: Preamble: Calculation Of Frequency Response Functionsmentioning

confidence: 99%

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

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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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“…In the approach proposed, the PAI of the structure-cavity subsystem are derived from its FE model. At a given angular frequency ω, the classical (U,P) formulation of this subsystem is written as follows: (see [20,21]) :…”

Section: Formulationmentioning

confidence: 99%

“…This approach is not based on an assumption of weak coupling between subsystems, thus it can be used to solve problems of fluid-structure interaction in heavy fluid. Initial developments [20] based on partitioning at the fluid-structure interface have shown that using a standard mode expansion to build the cavity-PTF leads to poor convergence of the PTF method in heavy fluid (as opposed to light fluid). To overcome this problem, the residual shape concept was introduced in the cavity-PTF calculation.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Patch Transfer Function Approach for Fluid-Structure Modelling in Heavy Fluid

Maxit

Aucejo

Guyader

2012

Journal of Vibration and Acoustics

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The vibro-acoustic behavior of elastic structures coupled with cavities filled with a heavy fluid can be modeled by using the Finite Element Method. In order to reduce computing time, the Patch Transfer Function (PTF) approach is used to partition the global problem into different sub-problems. Different types of problem partitioning are studied in this paper. Partitioning outside the near field of structures to reduce the number of patches of the coupling surface for frequencies below the critical frequency is of particular interest. This implies introducing a non- standard modal expansion to compute the PTF accurately enough to guarantee the convergence of the PTF method and reduce computation time in comparison to a direct Finite Element resolution. An application on a submarine structure illustrates the interest of this approach.

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Convergence acceleration using the residual shape technique when solving structure–acoustic coupling with the Patch Transfer Functions method

Cited by 24 publications

References 21 publications

Modeling vibroacoustic systems involving cascade open cavities and micro-perforated panels

Modeling vibroacoustic systems involving cascade open cavities and micro-perforated panels

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

Improving the Patch Transfer Function Approach for Fluid-Structure Modelling in Heavy Fluid

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