Vibration Analysis of Orthotropic Sandwich Plate with MR Elastomer

Abstract

Vibration characteristic analysis of orthotropic rectangular sandwich plate with magnetorheological (MR) elastomer core and constraining layer is presented in this study. The orthotropic rectangular plate is covered a MR fluid core and a constraining layer in order to improve the vibrational behaviors of the system. The finite element method is utilized to derive the finite element equations of motion for the orthotropic sandwich system. The effects of the natural frequencies and loss factors of the orthotropic sandwich plate are discussed. The rheological property of the MR material can be changed and controlled by applying various magnetic fields. The modal dampings and the natural frequencies for the orthotropic sandwich plate are calculated for various magnetic fields. Besides, the effects of the strength ratio of the base plate on the natural frequencies and modal loss factors are also discussed.