Diffuse field sound transmission through sandwich composite cylindrical shells with poroelastic core and external mean flow

Liu, Yu; He, Chuanbo

doi:10.1016/j.compstruct.2015.09.025

Cited by 54 publications

(36 citation statements)

References 43 publications

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“…Their study showed that the model can predict the STL of multi-layered structures in the low, medium and high frequency regions. Liu and He [100] adopted the TMM to solve the vibro-acoustic problem of composite cylindrical shells with poroelastic core under external mean flow. The Love's theory was used to model the shells while the Biot's theory as will be explained in the subsequent subsection, was used to model the poroelastic core.…”

Section: Transfer Matrix Methodsmentioning

confidence: 99%

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: Transfer Matrix Methodsmentioning

confidence: 99%

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

2020

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“…Analytical approaches have been proposed in the literature to deal with multi-layered panels lined with porous materials, as in [15]. Liu et al, in [16,17,18,19], then proposed analytical approaches for double-walled flat and curved panels, lined with porous layers, under both acoustic sources and mean flow. Biots theory is employed and a transfer matrix equation along with appropriate boundary conditions is used to solve the system simultaneously [16,17].…”

Section: Introductionmentioning

confidence: 99%

Simulating the sound transmission loss of complex curved panels with attached noise control materials using periodic cell wavemodes

et al. 2019

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The sound transmission loss of complex curved aircraft panels under diffuse acoustic field excitation is experimentally and numerically studied. Two different aircraft sidewall panels are considered: a thick composite sandwich panel and a thin aluminium panel with stiffening elements (stringers and frames). Both bare configuration and with attached soundproofing material are tested in laboratory conditions in coupled rooms. The numerical approach relies on a wave finite element method including modal order reduction at cell scale and an extension based on the transfer matrix method, for the inclusion of poroelastic treatments. The results obtained show that the proposed numerical scheme is efficient for predicting the sound transmission loss of such complex structures.

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“…Liu et al [23] also conducted their attention on power transmission of the double-walled sandwich panel along with external and gap mean flows. Just recently, an analytical study was proposed through the sandwich structure taking the transfer matrix method into account [24]. Arunkumar et al [25] suggested a theoretical model to inspect the influence of entering core material on acoustic transmission of the sandwich panels.…”

Section: Introductionmentioning

confidence: 99%

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

Talebitooti

Khameneh

Zarastvand

et al. 2018

Jnl of Sandwich Structures & Materials

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The present work applies three-dimensional elasticity theory as well as extended full method based on Biot’s theory to inspect the effect of compressing porous material on sound transmission loss of the multilayered cylindrical shell subjected to porous core and air-gap insulation in the presence of external flow considering various boundary configurations. According to this fact, first, three-dimensional elasticity theory is employed for the double-walled laminated composite parts of the structure which leads to governing equations with no extra assumptions as well as considering extended full method for poroelastic section which models the structure in three directions with no need to identify the frequency domain (unlike the simplified method). Consequently, the obtained equations are solved applying state space method based on approximate laminate model beside transfer matrix approach. Likewise, the procedure is followed to obtain sound transmission loss in appropriate boundary condition. Second, the influence of compressing porous core on acoustic transmission of the current structure is cleared. Furthermore, this paper includes some configurations which compare the obtained results with those available in literature to indicate the accuracy, reliability and simplicity of the present method particularly in comparison with the simplified method. Finally, some configurations are appeared in numerical result section to show the effects of the various parameters on sound transmission loss.

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Diffuse field sound transmission through sandwich composite cylindrical shells with poroelastic core and external mean flow

Cited by 54 publications

References 43 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

Simulating the sound transmission loss of complex curved panels with attached noise control materials using periodic cell wavemodes

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

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