Analysis of Sandwich Plates by Generalized Differential Quadrature Method

Figure 2

First 4 modes of vibration of four-layer [0^∘/90^∘/90^∘/0^∘] simply supported laminated plate (𝑤=(𝑤𝑎²/ℎ)𝜌/𝐸₂,ℎ/𝑎=0.2), 𝐸₁/𝐸₂=30, grid 19×19 points.

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