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Sound Transmission Analysis of Viscoelastic Composite Multilayered Shells Structures

Faculty of Engineering and Architecture, Kore University of Enna, 94100 Enna, Italy
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Aerospace 2019, 6(6), 69; https://doi.org/10.3390/aerospace6060069
Received: 20 May 2019 / Revised: 1 June 2019 / Accepted: 3 June 2019 / Published: 6 June 2019
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Abstract

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. View Full-Text
Keywords: shell elements; noise reduction; viscoelasticity; composite; layer-wise shell elements; noise reduction; viscoelasticity; composite; layer-wise
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Valvano, S.; Alaimo, A.; Orlando, C. Sound Transmission Analysis of Viscoelastic Composite Multilayered Shells Structures. Aerospace 2019, 6, 69.

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