| Title |
Nonlinear Random Vibration of Laminated FRP Plates by Comparison of Deterministic Dynamic Analysis |
| Keywords |
Laminated Plates ; Shear Deformation ; Random Vibration ; Material Nonlinearity ; Deterministic Dynamic Analysis |
| Abstract |
The nonlinear response of thick laminated FRP plates modeled with finite elements and excited by stochastic loading is studied. A third-order shear theory is used to account for the variation of strains through the thickness, since Kirchhoff and Mindlin plate theories are usually inadequate for modeling composite plates of reasonable thickness. Further, since most composite materials exhibit significant nonlinearity in the shear stress-strain law, this is included in the analysis. In this study, the method of equivalent linearization is used in conjunction with the finite element method to perform nonlinear random vibration analysis of laminated composite plates. A formulation for the deterministic dynamic analysis is also developed and some deterministic simulations are performed to verify the accuracy of the random vibration analysis. |