The Effect of Rotation on the Free Vibrations in a Non-homogeneous
Orthotropic Elastic Hollow Sphere
Abstract
This article examines the radial vibrations of spherical isotropy
embedded in an elastic medium according to the one-dimensional (1D)
elastic theory. Based on the linear theory of elasticity, the rotation
and inhomogeneity effects on wave propagation in orthotropic material
are analyzed. The 1Delastodynamicsequation is solved in terms of radial
displacement. We consider three boundaries: free, fixed, and mixed
orthotropic materials. In the case of harmonic vibrations, the
eigenvalues of the natural frequency of the radial vibrations for
different boundary conditions are determined. For each case, the
numerical results are presented, illustrated graphically, and then
compared with those in the absence of rotation and non-homogeneity. An
increase in the rotation and non-homogeneity parameters is observed,
similar to the findings of the classical sphere theory. Therefore, this
study can also be used in the design and optimization of microplates and
nanoplates. The findings show that rotation and non-homogeneity have a
strong impact on wave propagation in orthotropic material.