Transient Analysis and Free Vibration of Functionally Graded Truncated Conical Shells Subjected to Moving Pressure

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran

2 Professor/Shiraz University of Technology

3 Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

In this paper, an efficient and accurate solution method is developed for transient analysis and free vibration of functionally graded truncated conical shell, subjected to symmetric internal or external moving pressure. The material properties of the shell are graded continuously in the radial direction according to a Mori-Tanaka and volume fraction power-law distribution. A hybrid solution method composed of the layerwise theory, differential quadrature method and Fourier series expansion is employed to investigate the aforementioned problem. A Fourier series expansion is used for the displacement components and dynamic pressure in the axial direction. Then the layerwise theory across the thickness direction in conjunction with Hamilton’s principle is employed to obtain equations of motion and boundary conditions. Eventually, the differential quadrature method is implemented to discretize the governing equations in the time domain. This research shows some interesting results that can be helpful for the design of functionally graded shells subjected to moving pressure. The developed results are successfully compared with the available results in the literature. The convergence study demonstrates the fast convergence rate with a relatively low computational cost. The results reveal that a free vibration with significant amplitude is generated due to excitation from the transition of the moving pressure.
 

Keywords

Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 53, Issue 2
May 2021
Pages 897-912

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