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FROM:
Lijie Li (1), Haichao Li (2), Fuzhen Pang (2,3), Xueren Wang (3), Yuan Du (2) and Shuo Li (2)
(1) College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China
(2) College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
(3) Naval Academy of Armament, Beijing 100161, China
“The Modified Fourier-Ritz Approach for the Free Vibration of Functionally Graded Cylindrical, Conical, Spherical Panels and Shells of Revolution with General Boundary Condition”, Mathematical Problems in Engineering, Volume 2017, Article ID 9183924, 32 pages, https://doi.org/10.1155/2017/9183924
ABSTRACT: The aim of this paper is to extend the modified Fourier-Ritz approach to evaluate the free vibration of four-parameter functionally graded moderately thick cylindrical, conical, spherical panels and shells of revolution with general boundary conditions. The first-order shear deformation theory is employed to formulate the theoretical model. In the modified Fourier-Ritz approach, the admissible functions of the structure elements are expanded into the improved Fourier series which consist of two-dimensional (2D) Fourier cosine series and auxiliary functions to eliminate all the relevant discontinuities of the displacements and their derivatives at the edges regardless of boundary conditions and then solve the natural frequencies by means of the Ritz method. As one merit of this paper, the functionally graded cylindrical, conical, spherical shells are, respectively, regarded as a special functionally graded cylindrical, conical, spherical panels, and the coupling spring technology is introduced to ensure the kinematic and physical compatibility at the common meridian. The excellent accuracy and reliability of the unified computational model are compared with the results found in the literatures.
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