RT Journal Article SR Electronic A1 Abdelmalek, Abdelmalek A1 Mokhtar, Bouazza T1 Study of the Vibratory Behavior of Composite Plates under the Effect of Different Reinforcement Parameters JF Acta Mechanica Slovaca YR 2014 VO 18 IS 2 SP 70 OP 75 DO 10.21496/ams.2014.022 UL https://www.actamechanica.sk/artkey/ams-201402-0010.php AB This contribution consists of the free vibratory behavior analysis of composite plates laminated; the study of the vibration in displacement of such structures rests primarily on the research of the frequencies and the clean modes, the main axis of this study is the enhancement and the discussion of the effects various geometry of plate, the reinforcement fibers orientation and the ratio orthotropic of the material on the oscillation frequencies. The choice of the model that says we have taken into consideration in the simulation, meets the objective of our study and the results are then validated by available literature results.