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Dynamic and acoustic properties of viscoelastic laminated structures

Dynamic and acoustic properties of viscoelastic laminated structures
Dynamic and acoustic properties of viscoelastic laminated structures
Numerical computation of wave characteristics in composite laminated structures is obtained using a Wave Finite Element method. The method involves conventional finite element (FE) analysis of a small segment of the structure. Typically, this consists of a stack of solid elements meshed through the cross-section. Each layer can be discretised using either one solid element or more solid elements. The analyst must select element type and number appropriately in order to accurately model the three-dimensional stress-strain state of the structure (in the context of FE analysis). The advantages of the proposed method are that it involves post-processing of a small FE model, commercial FE packages can be used to generate the model, no new elements need to be derived and implemented, and the computational cost is extremely small. Axisymmetric properties of the structure can be exploited, and the method can take advantage of the capability of commercial FE packages to model acoustic fluids and fluid-structure interaction. The method is described and illustrated by application to a laminated viscoelastic sandwich panel in vacuo and a laminated viscoelastic sandwich cylinder filled with fluid. Complex dispersion curves and wave modes are given. The global loss factor as a function of the frequency is also predicted, and the effect of the initial pre-stress is discussed.


Manconi, Elisabetta
8c91c8de-3238-4259-9fb4-ac8d4fec2b2d
Mace, Brian Richard
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Manconi, Elisabetta
8c91c8de-3238-4259-9fb4-ac8d4fec2b2d
Mace, Brian Richard
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe

Manconi, Elisabetta and Mace, Brian Richard (2010) Dynamic and acoustic properties of viscoelastic laminated structures. 17th International Congress on Sound and Vibration (ICSV), Cairo, Cairo, Egypt. 17 - 21 Jul 2010. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Numerical computation of wave characteristics in composite laminated structures is obtained using a Wave Finite Element method. The method involves conventional finite element (FE) analysis of a small segment of the structure. Typically, this consists of a stack of solid elements meshed through the cross-section. Each layer can be discretised using either one solid element or more solid elements. The analyst must select element type and number appropriately in order to accurately model the three-dimensional stress-strain state of the structure (in the context of FE analysis). The advantages of the proposed method are that it involves post-processing of a small FE model, commercial FE packages can be used to generate the model, no new elements need to be derived and implemented, and the computational cost is extremely small. Axisymmetric properties of the structure can be exploited, and the method can take advantage of the capability of commercial FE packages to model acoustic fluids and fluid-structure interaction. The method is described and illustrated by application to a laminated viscoelastic sandwich panel in vacuo and a laminated viscoelastic sandwich cylinder filled with fluid. Complex dispersion curves and wave modes are given. The global loss factor as a function of the frequency is also predicted, and the effect of the initial pre-stress is discussed.


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More information

e-pub ahead of print date: July 2010
Additional Information: Paper 299, CD-ROM
Venue - Dates: 17th International Congress on Sound and Vibration (ICSV), Cairo, Cairo, Egypt, 2010-07-17 - 2010-07-21

Identifiers

Local EPrints ID: 172055
URI: http://eprints.soton.ac.uk/id/eprint/172055
PURE UUID: 301afcce-df74-41f6-8b3d-1b5ddac7fa66
ORCID for Brian Richard Mace: ORCID iD orcid.org/0000-0003-3312-4918

Catalogue record

Date deposited: 24 Jan 2011 12:00
Last modified: 08 Jan 2022 02:54

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Contributors

Author: Elisabetta Manconi

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