Determination of the excitation frequencies of laminated orthotropic non-homogeneous conical shells

Sofiyev A. , Kuruoglu N.

COMPOSITES PART B-ENGINEERING, vol.132, pp.151-160, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 132
  • Publication Date: 2018
  • Doi Number: 10.1016/j.compositesb.2017.08.013
  • Page Numbers: pp.151-160


The excitation frequencies of parametric vibration of laminated non-homogeneous orthotropic conical shells (LNHOCSs) under axial load periodically varying with time, are determined using the classical shell theory (CST). The basic equations are found using the Donnell-Mushtari shell theory and reduce to the Mathieu-Hill type differential equation, in which the instability is examined by the Bolotin method. To validate of current results was made a comparison with the previous studies. The effects of stacking sequences, axial load factors, non-homogeneity, as well as the variation of geometric characteristics on the backward and forward excitation frequencies (BFEFs) of conical shells are studied in detail. (C) 2017 Elsevier Ltd. All rights reserved.