Assessments of shear core effects on sound transmission loss through sandwich panels using a two-scale approach

Zergoune, Zakaria; Ichchou, Mohamed; Bareille, Olivier; Harras, B.; Benamar, Rhali; Troclet, Bernard

doi:10.1016/j.compstruc.2016.11.017

Cited by 17 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The effect of finite size on the STL was investigated and the authors arrived at the conclusion that the WFEM was able to predict the STL very fast with low computational cost. Zergoune et al [110] also adopted this model recently to model the STL of sandwich structures particularly in the low and medium frequency range. The authors used the DLM and the WSFE model with experimental results to verify and validate, respectively their predicted model.…”

Section: Wave Finite Element Methodsmentioning

confidence: 99%

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

2020

View full text Add to dashboard Cite

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.

show abstract

Section: Wave Finite Element Methodsmentioning

confidence: 99%

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

2020

View full text Add to dashboard Cite

show abstract

“…Baho et al [17], for instance, used a wavemode energy method, coupled with a wave assurance criterion, to predict the transition frequency of honeycomb panels modelled using a single periodic cells. In addition, the core geometry effects on the shear-core transition and sound transmission loss of honeycomb sandwich plates, are investigated in [18]. Zergoune et al [18] show the transmission loss sensitivity to most of the classic topological parameters of honeycomb cored sandwich panels, such as angles between walls, thickness and deformation of hexagonal core cells.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the core geometry effects on the shear-core transition and sound transmission loss of honeycomb sandwich plates, are investigated in [18]. Zergoune et al [18] show the transmission loss sensitivity to most of the classic topological parameters of honeycomb cored sandwich panels, such as angles between walls, thickness and deformation of hexagonal core cells.…”

Section: Introductionmentioning

confidence: 99%

Investigations about periodic design for broadband increased sound transmission loss of sandwich panels using 3D-printed models

Errico

Ichchou

Rosa

et al. 2020

Mechanical Systems and Signal Processing

Self Cite

View full text Add to dashboard Cite

Two types of sandwich panels are designed by using the periodic structure theory. A double-wall panel with mechanical links and a sandwich panel with rectangular core are studied. An oriented optimization of the elastic bending waves' propagation versus the acoustic wavenumbers is achieved by using shifted core walls and by keeping the mass and stiffness of the system constant. Standard and optimized configurations are 3D-printed and sound transmission measurements are carried out by using a facility with an uncoupled reverberant-anechoic configuration. The experimental evidences of enlarged bending band-gaps and deformation mechanisms are proved using a reverse approach based on the acoustic radiation of the panels.

show abstract

“…In this context, parametric analyses were performed by modifying the geometrical parameters of honeycomb cores [1,2] to investigate their influence on vibroacoustic indicators. It occurs that the geometrical shape of the honeycomb core has a negligible effect while the thickness of the core is considered as a critical parameter.…”

Section: Introductionmentioning

confidence: 99%

On the multi-scale vibroacoustic behavior of multi-layer rectangular core topology systems

Guenfoud

Droz

Ichchou

et al. 2020

Mechanical Systems and Signal Processing

Self Cite

View full text Add to dashboard Cite

The present work deals with multi-layer rectangular core topology systems built up by stacking layers made of different rectangular core geometries. Multi-layer systems have been intensively studied in terms of mechanical performances whereas their vibroacoustic behavior, acoustic efficiency and design is however still an open issue. Several design parameters should be considered to fully understand the dynamic and acoustic behaviour of such structures. Therefore, this paper focuses on controlling the transition frequency and the Sound Transmission Loss (STL) by modifying geometrical parameters of the unit cell, while keeping the mass constant. Infinite panels and real wavenumbers will be considered in the study. The Wave Finite Element Method (WFEM) is used to obtain the targeted indicators. The proposed designs give the opportunity to shift the transition frequency and to control the flexural waves propagating in the structure. Besides, the STL is highly improved in the full frequency range of interest compared to a standard sandwich panel made of a single core.

show abstract

Assessments of shear core effects on sound transmission loss through sandwich panels using a two-scale approach

Cited by 17 publications

References 20 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

Investigations about periodic design for broadband increased sound transmission loss of sandwich panels using 3D-printed models

On the multi-scale vibroacoustic behavior of multi-layer rectangular core topology systems

Contact Info

Product

Resources

About