Free Vibration of Functionally Graded Sandwich Shallow Shells on Winkler and Pasternak Foundations with General Boundary Restraints

Figure 10

Variation of the frequency parameters versus the foundation coefficients for simply supported FGSSS with various curvature types. (a) plate; (b) circular cylindrical shallow shell; (c) spherical shallow shell; (d) hyperbolic paraboloidal shallow shell.

(a)

(b)

(c)

(d)