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mohammadi, R., meskini, M., mohammadkhanlo, H. (2024). Effect of Hydrostatic Pressure on the Free Vibrations of Hybrid Cylindrical Shell. Electronic and Cyber Defense, 20(2), 87-103.
rashid mohammadi; mohammad meskini; heshmatollah mohammadkhanlo. "Effect of Hydrostatic Pressure on the Free Vibrations of Hybrid Cylindrical Shell". Electronic and Cyber Defense, 20, 2, 2024, 87-103.
mohammadi, R., meskini, M., mohammadkhanlo, H. (2024). 'Effect of Hydrostatic Pressure on the Free Vibrations of Hybrid Cylindrical Shell', Electronic and Cyber Defense, 20(2), pp. 87-103.
mohammadi, R., meskini, M., mohammadkhanlo, H. Effect of Hydrostatic Pressure on the Free Vibrations of Hybrid Cylindrical Shell. Electronic and Cyber Defense, 2024; 20(2): 87-103.

Effect of Hydrostatic Pressure on the Free Vibrations of Hybrid Cylindrical Shell

مکانیک هوافضا
Article 7, Volume 20, Issue 2 - Serial Number 76, July 2024, Pages 87-103    PDF (1.01 M)
Document Type: Solid Mechanics
Authors
rashid mohammadi1; mohammad meskini* 2; heshmatollah mohammadkhanlo3
1M.Sc Student, Faculty of Graduate Studies, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
2Corresponding author: Assistant Professor, Faculty of Graduate Studies, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
3Associate Professor, Faculty of Graduate Studies, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
Receive Date: 29 February 2024,  Revise Date: 17 March 2025,  Accept Date: 11 May 2024 
Abstract
Considering the increasing use of hybrid cylindrical shells in various industries, the free vibration analysis of these types of structures is very important. In this research, the free vibrations of the hybrid cylindrical shell under the influence of hydrostatic pressure have been analyzed and investigated. Investigating the hydrostatic pressure in hybrid shells is one of the important and required things for the optimal design of the structure, investigating the performance of the structure in different environmental conditions, bearing and resistance to pressure, etc. The boundary conditions for the cylindrical shell have been considered as fixed, free and simple, the equations governing the structure of the hybrid cylindrical shell are based on the displacement field and the stress and strain relations in matrix form using the first-order shear deformation theory of the shell and Hamilton's principle obtained and using generalized differential quadratic numerical method, the governing equations of the structure were solved and the effect of fiber angle, composite materials, hydrostatic pressure, composite to metal ratio, length to radius and thickness to radius of the cylinder on the natural frequency of the shell was investigated  and analyzed. Numerical results have been compared and validated with the results of the research. The results show that the hybrid shell with the distribution of composite materials and in a specific volume ratio shows better behavior against different hydrostatic pressure.

Highlights
  • Increasing hydrostatic pressure decreases the natural frequency.
  • Effect of composite material on natural frequency of hybrid cylindrical shell.
  • Generalized Differential Quadrature method
Keywords
Hydrostatic pressure; Free vibrations; First order shear deformation theory; Hybrid; Cylindrical shells
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