Free Vibrational Characteristics of Sandwich Cylindrical Shells Containing a Zero Poisson's Ratio Cellular Core

PurposeCellular configurations with ZPR more suitable for cylindrical sandwich shell in which the structure needs undergo pure cylindrical bending. To date, research in the vibration response of cylindrical sandwich shell is still a challenging task. This article proposes one method for free vibration analysis of sandwich cylindrical shells consisting of elastic-isotropic skin and a zero Poisson's ratio cellular core was proposed.MethodThe free vibration characteristics of the sandwich cylindrical shells has been studied using classical thin shell theory. Theoretical models of the effective mechanical performances of the cellular core are established by homogenization methods. The accuracies of theoretical predictions are validated by the finite element method and comparing with others from some available literatures.Results and ConclusionsBased on the theoretical predictions, the influences on effective mechanical performances of the cellular core and natural frequencies of the sandwich cylindrical shell caused by geometric parameters are evaluated in detail. These geometrical parameters provide different contributions to the effective mechanical properties and dynamic response, which can lead to separate designs for improving their dynamic characteristics.