Research Article

The Modified Fourier-Ritz Approach for the Free Vibration of Functionally Graded Cylindrical, Conical, Spherical Panels and Shells of Revolution with General Boundary Condition

Figure 12

Variation of the first four frequency parameters versus the circumferential angle for FG panels: (a) cylindrical panels; (b) conical panels; (c) spherical panels.
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(b)
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