Vibroacoustic analysis of double-wall sandwich panels with viscoelastic core

Larbi, Walid; Deü, Jean-François; Ohayon, Roger

doi:10.1016/j.compstruc.2015.09.012

Cited by 65 publications

(30 citation statements)

References 33 publications

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“…Finite element methods have been used to model the vibroacoustic emission of sandwich and composite DPS [32,104]. An improved method-the wave finite element method (WFEM) described by Mace and Mancony [105], Droz et al [106] and Chronopoulos et al [107], is a numerical model reduction method which permits the modelling of each cell element rather than modelling the complete structure.…”

Section: Wave Finite Element Methodsmentioning

confidence: 99%

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Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

2020

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The increasing motivation behind the recently wide industrial applications of sandwich and composite double panel structures stems from their ability to absorb sounds more effectively. Meticulous selection of the geometrical and material constituents of both the core and panels of these structures can produce highly desirable properties. A good understanding of their vibro-acoustic response and emission index such as the sound transmission loss (STL) is, therefore, a requisite to producing optimal design. In this study, an overview of recent advances in STL of sandwich and composites double panels is presented. At first, some salient explanation of the various frequency and controlled regions are given. It then critically examines a number of parameter effects on the STL of sandwich and composite structures. Literatures on the numerical, analytical and experimental solutions of STL are systematically presented. Efficient and more reliable optimization problems that maximize the STL and minimize the objective functions capable of degrading the effectiveness of the structure to absorb sounds are also provided.

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Section: Wave Finite Element Methodsmentioning

confidence: 99%

“…-Frequency at which the double panels vibrates on the stiffness of the separating air layer. [31,32] Ring…”

Section: Symbol Formula Definition Referencementioning

confidence: 99%

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

2020

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“…The transfer matrix method is developed in Reference [36] for a comparison with experimental sound transmission factor results of multilayered structures. A classical finite element formulation is presented for the vibroacoustic analysis of sandwich panels embedding viscoelastic core in Reference [37]. The innovation and novelty of the present paper is focused to the developement of an advanced finite element formulation for the sound transmission analysis of composite shell structures embedding viscoelastic layers modeled by means of fractional derivative approach.…”

Section: Introductionmentioning

confidence: 99%

“…The innovation and novelty of the present paper is focused to the developement of an advanced finite element formulation for the sound transmission analysis of composite shell structures embedding viscoelastic layers modeled by means of fractional derivative approach. To the best Authors knowledge, very few results on finite element models of plate structures embedding viscoelastic layers with constant damping [35,37], and cylindrical shell isotropic structure [23][24][25] are present in literature. For the reason stated above, an advanced finite element formulation for the sound transmission analysis of viscoelastic composite shell structures has been addressed in the present work, presenting a more comprehensive investigation campaign that can be used as benchmark and takes into account the damping fractional derivatives behavior, the boundary condition effects and the influence of the curvature.…”

Section: Introductionmentioning

confidence: 99%

Sound Transmission Analysis of Viscoelastic Composite Multilayered Shells Structures

2019

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In the development of aircraft comfort, one of the main issues is the sound transmission analysis to estimate the insulation capability of aeronautical panels. In this work, a higher-order shell finite element is proposed for the passive noise insulation analysis of composite laminated structures embedding viscoelastic layers. Starting from the Principle of Virtual Displacements, the present Finite Elements are obtained by making use of higher-order Layer-Wise theories, employing the Mixed Interpolated Tensorial Components (MITC) method to avoid the shear locking effect and taking into account the frequency dependence of the viscoelastic material through the use of a fractional derivative model. The Rayleigh integral method is considered for the evaluation of the acoustic insulation of the panels. Numerical studies are carried out to demonstrate that the present shell finite element is an efficient and accurate tool for the sound transmission analysis. Different lamination sequences, different boundary conditions and various radius to thickness ratios are taken into account.

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“…Based on Biot model, Lauriks et al [10] have proposed a transfer matrix model for acoustic transmission through double-plate filled with porous material. By finite element method, Larbi et al [11] studied the sound transmission through double wall sandwich panels with viscoelastic core. Panneton and Atalla [12] investigated a three-dimensional (3D) finite element model to calculate the sound transmission loss through multilayer structures containing porous absorbent materials.…”

Section: Introductionmentioning

confidence: 99%

Sound Transmission Across a Finite Simply Supported Double-Laminated Composite Plate With Enclosed Air Cavity

Thanh¹,

Thinh²

2019

JST

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Vibro-acoustic analysis of a finite orthotropic laminated double-composite plate with enclosed air cavity on an infinite acoustic rigid baffle is investigated analytically. Using the acoustic velocity potential to describe the acoustic vibration performance of a simple supported structure, the sound transmission loss (STL) is calculated from the ratio of incident to transmitted acoustic powers. Specifically, the focus is placed on the effects of several key system parameters on sound transmission including the plate dimensions, the laminate configurations, the boundary conditions and the composite materials are systematically examined.

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Vibroacoustic analysis of double-wall sandwich panels with viscoelastic core

Cited by 65 publications

References 33 publications

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Sound Transmission Analysis of Viscoelastic Composite Multilayered Shells Structures

Sound Transmission Across a Finite Simply Supported Double-Laminated Composite Plate With Enclosed Air Cavity

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