Research Article
Nonlinear Vibrations of 3D Laminated Composite Beams
Table 5
Natural frequencies (rad/s) of clamped-clamped laminated composite beam with asymmetric cross ply [0°/90°/0°/90°], validation with Elmer.
| | Mode | Case 3 [0°/90°/0°/90°] | Beam
60 DOF | Elmer
1 million DOF | Mode shape | Difference % |
| | 1 | 1102.01 | 1096.80 | (, ) | 0.476 | | 2 | 1188.69 | 1186.15 | (, ) | 0.215 | | 3 | 2967.67 | 2912.99 | (, ) | 1.877 | | 4 | 3196.75 | 3153.58 | (, ) | 1.369 | | 5 | 4932.52 | 4874.94 | | 1.181 | | 6 | 5564.63 | 5461.35 | (, ) | 1.891 | | 7 | 5979.39 | 5919.25 | (, ) | 1.016 | | 8 | 8856.42 | 8583.29 | (, ) | 3.182 | | 9 | 9498.00 | 9313.68 | (, ) | 1.979 | | 10 | 9851.14 | 9751.74 | | 1.019 |
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