Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2829
Título: Dimensionless analysis of constrained damping treatments
Autor: Sher, B. R.
Moreira, R. A. S.
Palavras-chave: Viscoelastic damping
Modal strain energy
Thin layers
Thickness optimisation
Dimensionless loss factor
Layerwise Finite-Element
Viscoelastic Layers
Sandwich Beam
Vibration Plates
Data: Mai-2013
Editora: Elsevier
Citação: Sher, B. R.; Moreira, R. A. S. - Dimensionless analysis of constrained damping treatments. Composite Structures. ISSN 0263-8223. Vol. 99 (2013), p. 241-254.
Resumo: One of the most effective ways of controlling vibrations in plate or beam structures is by means of constrained viscoelastic damping treatments. Contrary to the unconstrained configuration, the design of constrained and integrated layer damping treatments is multifaceted because the thickness of the viscoelastic layer acts distinctly on the two main counterparts of the strain energy the volume of viscoelastic material and the shear strain field. In this work, a parametric study is performed exploring the effect that the design parameters, namely the thickness/length ratio, constraining layer thickness, material modulus, natural mode and boundary conditions have on these two counterparts and subsequently, on the treatment efficiency. This paper presents five parametric studies, namely, the thickness/length ratio, the constraining layer thickness, material properties, natural mode and boundary conditions. The results obtained evidence an interesting effect when dealing with very thin viscoelastic layers that contradicts the standard treatment efficiency vs. layer thickness relation; hence, the potential optimisation of constrained and integrated viscoelastic treatments through the use of properly designed thin multilayer configurations is justified. This work presents a dimensionless analysis and provides useful general guidelines for the efficient design of constrained and integrated damping treatments based on single or multi-layer configurations. (C) 2012 Elsevier Ltd. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2829
ISSN: 0263-8223
Aparece nas colecções:ISEL - Eng. Mecan. - Artigos

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