Experimental identification of GHM and ADF parameters for viscoelastic damping modeling

• Main Author: C. M. A. Vasques
• Publication Date: 2006
• Other Authors: R. A. S. Moreira, J. Dias Rodrigues
• Format: Book
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: https://hdl.handle.net/10216/69578
• topic: Engenharia mecânica, Engenharia mecânica; Mechanical engineering, Mechanical engineering

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.