Free vibration of moderately thick functionally graded parabolic and circular panels and shells of revolution with general boundary conditions

Qingshan Wang (College of Mechanical and Electrical Engineering, Central South University, Changsha, China)
Dongyan Shi (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)
Qian Liang (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)
Fuzhen Pang (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)

Engineering Computations

ISSN: 0264-4401

Publication date: 3 July 2017

Abstract

Purpose

The purpose of this work is to apply the Fourier–Ritz method to study the vibration behavior of the moderately thick functionally graded (FG) parabolic and circular panels and shells of revolution with general boundary conditions.

Design/methodology/approach

The modified Fourier series is chosen as the basis function of the admissible functions of the structure to eliminate all the relevant discontinuities of the displacements and their derivatives at the edges, and the vibration behavior is solved by means of the Ritz method. The complete shells of revolution can be achieved by using the coupling spring technique to imitate the kinematic compatibility and physical compatibility conditions of FG parabolic and circular panels at the common meridian of θ = 0 and 2π. The convergence and accuracy of the present method are verified by other contributors.

Findings

Some new results of FG panels and shells with elastic restraints, as well as different geometric and material parameters, are presented and the effects of the elastic restraint parameters, power-law exponent, circumference angle and power-law distributions on the free vibration characteristic of the panels are also presented, which can be served as benchmark data for the designers and engineers to avoid the unpleasant, inefficient and structurally damaging resonant.

Originality/value

The paper could provide the reference for the research about the moderately thick FG parabolic and circular panels and shells of revolution with general boundary conditions. In addition, the change of the boundary conditions can be easily achieved by just varying the stiffness of the boundary restraining springs along all the edges of panels without making any changes in the solution procedure.

Keywords

Acknowledgements

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51209052).

Citation

Wang, Q., Shi, D., Liang, Q. and Pang, F. (2017), "Free vibration of moderately thick functionally graded parabolic and circular panels and shells of revolution with general boundary conditions", Engineering Computations, Vol. 34 No. 5, pp. 1598-1641. https://doi.org/10.1108/EC-06-2016-0218

Publisher

:

Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited

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