Study on vibration characteristics of cylindrical sandwich tube with lattice core

Abstract

In this study, the natural frequency of cylindrical sandwich tube with lattice core has been investigated using finite element method (FEM). In particular, effects of geometrical parameters such as the ratio of the diameter to length, unit-cell size and facesheet thickness on the natural frequency were discussed. It is revealed that the natural vibration frequency of the lattice sandwich tube can be predicted with a good accuracy in a wide range of tube length-to-diameter ratio L/D by substituting the equivalent material properties (initial stiffness Eeq and Poisson’s ratio νeq) and relative density ρeq into the analytical equations for a straight tube of a continuum medium.

Keywords

• lattice
• vibration
• finite element method
• sandwich structure