A study on acoustic behavior of poroelastic media bonded between laminated composite panels

Abstract

A study on the acoustic behavior of double-walled panels, with sandwiched layer of porous materials is presented within Classical Laminated Plate Theory (CLPT) for laminated composite panels. For this purpose, equations of wave propagation are firstly extracted based on Biot's theory for porous materials, then the transmission loss (TL) of the structure is estimated in a broadband frequency. Secondly, TL coefficient of the structure is determined using Statistical Energy Analysis (SEA). In the next step, accuracy of the solution is shown with comparing the data obtained from these two presented models as well as the experimental results available in literature. Finally, the effects of parameters on sound transmission loss of double porous composite panels, especially at a high frequency range, are discussed. In addition, the results show that maximum sound energy is transferred through the waves frame (structure born) due to the porous layer bonded between the two composite panels. Therefore, material parameters that are principally related to solid phase of the foam such as Poisson's ratio, bulk density and bulk Young's modulus, have the most significant effects on the transmission loss. Meanwhile, the impacts of composite material panels and composite plies arrangement on sound transmission loss structures have been addressed in this paper. Keywords

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

“…Later on, the power transmission of a double-wall composite panel lined with porous core was calculated by Talebitooti et al. [1] using the SEA approach. In this regard, it is worth remarking another research [10] 9 based on entering a further layer of air-gap insulation.…”

“…Another unique feature of these structures is that by adapting the geometric and material factors of the skins and core, it is possible to optimally create some different designs for specific usages while the primary intention is to attenuate the value of noise transmitted into the construction. Multilayered structures can be modeled in the form of a plate [1], doubly curved shell [2–6], and cylindrical shell [7–11]. It is noteworthy that plate structures [12,13] do not involve any radii of curvature.…”

“…TL of a double-wall plate subjected to the porous core to frequency considering various porous thicknesses [1]. …”

Wave transmission across laminated composite plate in the subsonic flow Investigating Two-variable Refined Plate Theory

“…On the incident side as well as transmitted side of plate surfaces, the acceleration of the fluid particle through the acoustic media in the normal direction has to be equal to the normal acceleration of the plate. As a result, following equations are considered as (Howe, 1998;Shojaeefard et al, 2014b):…”

Investigation of three-dimensional theory on sound transmission through compressed poroelastic sandwich cylindrical shell in various boundary configurations

“…Then, Biot’s theory was employed by Kang et al [13] to interpret an analytical model of the shear wave propagation in a transversely isotropic poroelastic structure along with elastic or rigid boundary condition. Talebitooti et al [14] predicted the effect of the sandwiching porous material on power transmission of the double-walled panels investigating Classical Laminated Plate Theory. Subsequently, full method was employed in another research work [15] to designate acoustic transmission of the double-walled panels sandwiching a layer of air-gap insulation.…”