Numerical estimation of dynamic behavior of viscoelastic elastomer specimen

Abstract

Dynamic deformation behavior of a cylindrical specimen made of viscoelastic elastomers was investigated numerically by solving the two-dimensional elastic wave equations. In order to enhance the accuracy of the viscoelastic property calculations, a pseudospectral analysis of two-dimensional elastic wave equation was employed. This allowed us to exclude the use of the form factor derived from the conventional one-dimensional model. Using the present method, an assessment of the conventional form factor concept was attempted. The present two-dimensional method was then utilized to predict a forced vibration response of the elastomer samples under periodic excitation. Obtained numerical results were compared with those using the simplest one-dimensional model. Applicable range of the form factor was examined. Empirical formulas to correct static and dynamic form factors for elastic deformation mode, which are suitable for engineering applications, are suggested.

Modeling of a hydraulic engine mount for active pneumatic engine vibration control using the extended Kalman filter

“…In improving the performance of an engine mount using an efficient and practical design procedure, all the necessary parameters were derived from frequency response measurements [15,16]. According to the phenomena of fixed points and the constant value of dynamic stiffness in-phase at higher bands, a new parameter identification method was presented in [17][18][19].…”