In this paper, free vibrations of Functionally Graded decks Plates (FGP) with two distribution even and uneven of porosity are investigated. The plate is modeled using higher-order shears deformation plate theory. It has been observed that during the manufacture of (FGP), micro-voids and porosities can occur inside the material. In the resolution and the determination of the equations of motion Hamilton principle is used. Since the deck plate is simply supported the Navier procedure will be retained. Thus, in this work, the investigation of the free vibration analysis of (FGP) deck plate taking into account the perfect and influence of these imperfect is established. Natural frequencies are obtained for porous (FGP) with edges simply supported and verified with the results shown in the literature. A numerical study is conducted to examine the effects of various parameters such as material properties, thickness ratios, geometric ratio and the porosity coefficient on natural frequencies of the (FGP). It is found that the effects of exponent graded and the porosity coefficient on the natural frequencies are significant.IJBE-9-2-2021_SlimaneEtAl_33_50.pdf (637.0% u)
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