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, "Reduced Order Finite Element Models for Sound Transmission Analysis through a Double Sandwich Panel with Viscoelastic Core", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 229, 2014. doi:10.4203/ccp.106.229

Keywords: sandwich plate, double-wall, viscoelastic, vibroacoustic, finite element, modal reduction..

Summary

This paper presents a finite element model for sound transmission analysis through double sandwich panels with viscoelastic core inserted in an infinite baffle. The proposed model is derived from a multi-field variational principle involving structural displacement of the panels and acoustic pressure inside the fluid cavity. To solve the vibro-acoustic problem, the plate displacements are expanded as a modal summation of the plate's real eigenfunctions in vacuo. Similarly, the cavity pressure is expanded as a summation over the modes of the cavity with rigid boundaries. Then, an appropriate reduced-order model with a mode acceleration method by adding quasi-static corrections is introduced. The structure is excited by a plane wave. The radiated sound power is calculated by means of a discrete solution of the Rayleigh integral. Fluid loading is neglected. Various results are presented in order to validate and illustrate the efficiency of the proposed reduced finite element formulations.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 229 Reduced Order Finite Element Models for Sound Transmission Analysis through a Double Sandwich Panel with Viscoelastic Core W. Larbi, J.-F. Deü and R. Ohayon CNAM, Paris, France doi:10.4203/ccp.106.229 purchase the full-text of this paper Full Bibliographic Reference for this paper , "Reduced Order Finite Element Models for Sound Transmission Analysis through a Double Sandwich Panel with Viscoelastic Core", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 229, 2014. doi:10.4203/ccp.106.229 Keywords: sandwich plate, double-wall, viscoelastic, vibroacoustic, finite element, modal reduction.. Summary This paper presents a finite element model for sound transmission analysis through double sandwich panels with viscoelastic core inserted in an infinite baffle. The proposed model is derived from a multi-field variational principle involving structural displacement of the panels and acoustic pressure inside the fluid cavity. To solve the vibro-acoustic problem, the plate displacements are expanded as a modal summation of the plate's real eigenfunctions in vacuo. Similarly, the cavity pressure is expanded as a summation over the modes of the cavity with rigid boundaries. Then, an appropriate reduced-order model with a mode acceleration method by adding quasi-static corrections is introduced. The structure is excited by a plane wave. The radiated sound power is calculated by means of a discrete solution of the Rayleigh integral. Fluid loading is neglected. Various results are presented in order to validate and illustrate the efficiency of the proposed reduced finite element formulations. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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