Shock and Vibration / 2019 / Article / Fig 1

Research Article

Free Vibration of Rectangular Plates with Porosity Distributions under Complex Boundary Constraints

Figure 1

Geometric characteristic symbols and coordinates of porous rectangular plates: (a) the outline and coordinates; (b) the edge restraints; (c) translational and rotational spring of differential elements.
(a)
(b)
(c)

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