Experimental identification of GHM and ADF parameters for viscoelastic damping modeling

摘要

The implementation of the Golla-Hughes-McTavish (GHM) and Anelastic DisplacementFields (ADF) models in a general finite element (FE) model with viscoelastic dampingis presented and discussed in this paper. Additionally, a direct frequency analysis (DFA) isalso described and employed. A methodology to identify the complex shear modulus of theviscoelastic materials is described. The identified complex shear modulus of the viscoelasticmaterial 3M ISD112 is curve-fitted in order to obtain the modeling parameters of the GHMand ADF models. A sandwich plate with a viscoelastic core and elastic skins is analyzed. Measuredand predicted frequency response functions (FRFs) are compared with the purpose ofassessing the performance of the presented damping models. The analysis allows to asses thevalidity of the methodology to determine the frequency dependent complex modulus, the GHMand ADF parameters identification and the outcomes and drawbacks of the DFA, GHM andADF viscoelastic damping modeling strategies.