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Experimental identification of GHM and ADF parameters for viscoelastic damping modeling

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Resumo:The implementation of the Golla-Hughes-McTavish (GHM) and Anelastic Displacement Fields (ADF) models in a general finite element (FE) model with viscoelastic damping is presented and discussed in this paper. Additionally, a direct frequency analysis (DFA) is also described and employed. A methodology to identify the complex shear modulus of the viscoelastic materials is described. The identified complex shear modulus of the viscoelastic material 3M ISD112 is curve-fitted in order to obtain the modeling parameters of the GHM and ADF models. A sandwich plate with a viscoelastic core and elastic skins is analyzed. Measured and predicted frequency response functions (FRFs) are compared with the purpose of assessing the performance of the presented damping models. The analysis allows to asses the validity of the methodology to determine the frequency dependent complex modulus, the GHM and ADF parameters identification and the outcomes and drawbacks of the DFA, GHM and ADF viscoelastic damping modeling strategies.
Autores principais:C. M. A. Vasques
Outros Autores:R. A. S. Moreira; J. Dias Rodrigues
Assunto:Engenharia mecânica, Engenharia mecânica Mechanical engineering, Mechanical engineering
Ano:2006
País:Portugal
Tipo de documento:livro
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Porto
Idioma:inglês
Origem:Repositório Aberto da Universidade do Porto

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