Static and Dynamic Characteristics of Composite Conoidal Shell Roofs

Table 2

Nondimensional fundamental frequencies (𝜛) of simply supported composite spherical shell.

Lamination	0°/90°	0°/90°/0°	0°/90°/90°/0°
Reddy [1]	9.687	15.183	15.184
Present FEM (2×2)	14.897	15.209	15.221
(4×4)	9.722	15.209	15.222
(6×6)	9.691	15.179	15.195
(8×8)	9.681	15.180	15.183

𝑎/𝑏=1, 𝑎/ℎ=100, 𝐸₁₁=25𝐸₂₂, 𝐺₁₂=𝐺₁₃=0.5𝐸₂₂, 𝐺₂₃=0.2𝐸₂₂, 𝜈=0.25, 𝐸₂₂=10⁶ N/cm², and 𝑅/𝑎=10³⁰.