Vibration Characteristics Analysis of Orthotopic Rectangular Sandwich Plate with Magnetorheological Elastomer

摘要

Vibration characteristics of orthotropic rectangular sandwich plate with magnetorheological (MR) elastomer core and constraining layer is presented in this study. In order to improve the vibrational behaviors of the system, the orthotropic rectangular plate is covered a MR fluid core and a constraining layer. Finite element method is adopted 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.