Sound transmission loss of composite and sandwich panels in thermal environment

Li, Xiangyang; Yu, Kaiping; Zhao, Rui; Han, Jie Cai; Song, Hang

doi:10.1016/j.compositesb.2017.09.023

Cited by 32 publications

(19 citation statements)

References 62 publications

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“…Moreover, for the stacking sequence, the authors observed that the STL was enhanced by using plies with more zero degree ply orientation. In the same vein, three orientated parameters such as temperature, elevation angle and azimuthal angle were studied by Li et al [72]. Their findings showed that at low and mid frequency regions, the STL decreased with increased temperature.…”

Section: Influence Of Various Parameters On the Sound Transmission Lomentioning

confidence: 93%

“…The influence of various parameters on the STL of flat sandwich composite structures as depicted in Figure 5 has been investigated by a good number of researchers [64,[68][69][70][71]. In recent times, Li et al [72] performed an analytical solution of the STL of flat sandwich composite structures by expressing the STL as the mode shape superposition. The authors also studied how certain parameters such as the angle of elevation, temperature and azimuth of incident sound influenced the STL.…”

Section: Composite Flat Panelsmentioning

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: Influence Of Various Parameters On the Sound Transmission Lomentioning

confidence: 93%

Section: Composite Flat Panelsmentioning

confidence: 99%

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

2020

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“…k x , k y , and k z are the components of wave number along the x -, y - and z -directions and they are expressed as where k0=ωc denotes wave number of the sound waves in air, and c denotes the sound speed. The reflected sound pressure of the top face sheet is given as [47] where Wmn=sinmπxasinnπyb is the shape function of sandwich plate, Prmn are modal amplitudes of the reflected sound pressure. Similarly, the transmitted sound pressure is expressed as [47] where P tmn are modal amplitudes of the transmitted pressure wave.…”

Section: Theoretical Modelingmentioning

confidence: 99%

“…The reflected sound pressure of the top face sheet is given as [47] where Wmn=sinmπxasinnπyb is the shape function of sandwich plate, Prmn are modal amplitudes of the reflected sound pressure. Similarly, the transmitted sound pressure is expressed as [47] where P tmn are modal amplitudes of the transmitted pressure wave. The governing equation of the sandwich plate under the excitation of the combined sound pressure (i.e., incident, reflected and transmitted sound pressures) can be obtained as …”

Section: Theoretical Modelingmentioning

confidence: 99%

Sound transmission through sandwich plate with hourglass lattice truss core

Guo

Sorokin

et al. 2020

Jnl of Sandwich Structures & Materials

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This article is devoted to investigating sound insulation performance of a simply supported sandwich plate with an hourglass lattice core. The governing equations of lattice core sandwich plate are established using the Reissner sandwich plate theory. The solutions are derived using Fourier series expansion. The developed model is verified through the comparison with the results of the models from the existing literature, as well as finite element method (FEM). The effects of various structural and material parameters, the incident angle, and azimuth angle of the incident sound on sound insulation characteristics are investigated. It is demonstrated that the sandwich plate with the hourglass lattice core can outperform that with the traditional lattice cores. This work provides useful guidelines for the design of lightweight lattice sandwich structures in the application of sound insulation.

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“…Sound transmission loss (STL) of panels is one of important acoustic issues for investigators in the past decades. The most appealing structures for sound transmission are sandwich structures made of multiple layer panels and cores [1–18]. Sandwich panels can be designed to have low density, high stiffness-to-mass ratio, excellent mechanical and acoustic characteristics, and hence have been widely applied as soundproof concepts.…”

Section: Introductionmentioning

confidence: 99%

Sound transmission loss of sandwich panel with closed octahedral core

Wen

Wang

2019

Jnl of Sandwich Structures & Materials

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In this paper, an ultralightweight sandwich panel with closed octahedral core is proposed, which demonstrates excellent acoustic property of sound transmission loss as well as great mechanical performance. Simulation models are established with considerations of acoustic-structure interactions. The validity of simulation calculations is checked against experimental measurements with the tested specimens provided by additive manufacturing. Numerical discussions are conducted to demonstrate the effects of incident angles, topological parameters, and so on which should be helpful for practical design. This novel class of sandwich structure with closed octahedral core constructions shows promising engineering applications.

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Sound transmission loss of composite and sandwich panels in thermal environment

Cited by 32 publications

References 62 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 through sandwich plate with hourglass lattice truss core

Sound transmission loss of sandwich panel with closed octahedral core

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