Abstract:

A new method for determining all parameters of GHM model is presented. The modal parameters of the sandwich plate with a viscoelastic core are calculated based on GHM method. The numerical example illustrates that this method is reliable and accurate. It shows that the GHM model not only could describe stress strain relationship of viscoelastic material correctly, but also could be incorporated with the finite element method, which results in a linear second order system. Such a linear second order system can be used to realize the control of structure vibration conveniently.

Key words: visco elastic material, sandwich plate, GHM model, modal parameters