Free vibration analysis of rotating FGP sandwich cylindrical shells with metal-foam core layer

Abstract

This study offers a unique solution for the free vibration of rotating FGP sandwich cylindrical shells under different boundary conditions. A new type of sandwich structures with a metal-foam core and two coating FGM layers is investigated. Equations of motion governing the free vibration of rotating shells are derived by the first-order, shear-deformation shell theory. Single-term modal functions are introduced in Rayleigh-Ritz method to efficiently determine natural frequencies of the shell. After result validations, the influence of volume fraction index, distribution schemes, core-layer thickness, porosity coefficient, rotating velocity, geometrical parameters, and boundary conditions on the shell natural frequencies are studied.

Keywords:

• Free vibration
• rotating cylindrical shell
• FGP sandwich
• first-order shear deformation shell theory
• Rayleigh-Ritz method
• different boundary conditions

Disclosure statement

The authors have no conflicts of interest to disclose.

Additional information

Funding

This Research is funded by Thailand Science Research and Innovation Fund Chulalongkorn University (CU_FRB65_ind(11)_159_21_25). The authors also gratefully acknowledge the support provided by the CU Scholarship for ASEAN or Non-ASEAN Countries 2019 awarded to Van-Loi Nguyen and the Thailand Research Fund (Grant No. RTA6280012).