The effect of heterogeneity on the parametric instability of axially excited orthotropic conical shells

Sofiyev A., Pancar E. B.

Thin-Walled Structures, cilt.115, ss.240-246, 2017 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 115
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.tws.2017.02.023
  • Dergi Adı: Thin-Walled Structures
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.240-246
  • Anahtar Kelimeler: Backward and forward excitation frequencies, Heterogeneity, Orthotropic material, Parametric instability, Time dependent axial compressive load, Truncated conical shell
  • İstanbul Ticaret Üniversitesi Adresli: Hayır

Özet

The parametric instability of heterogeneous orthotropic truncated conical shells under time dependent axial compressive load on the basis of Donnell shell theory is investigated. The dynamic basic equations are reduced into a Mathieu-Hill type differential equation describing the instability of heterogeneous orthotropic truncated conical shells using Galerkin's method. The backward and forward excitation frequencies are determined by using Bolotin's method. A comparison with the previous studies has been developed in order to validate the present results. The effects of axial load factors, heterogeneity, orthotropy, as well as the variation of the characteristics of the conical shell on the backward and forward excitation frequencies are studied in detail.