Research Article
Free Vibration Analysis of Symmetrically Laminated Folded Plate Structures Using an Element-Free Galerkin Method
Table 1
Dimensionless free vibration frequencies of the onefold laminated plate with the lamination scheme (0°/90°/90°/0°).
| Crank angle | Modes | Present results | ANSYS results | Relative errors |
| = 90° | 1 | 8.9128 | 8.89037 | 0.25% | 2 | 10.0977 | 10.06576 | 0.32% | 3 | 12.9276 | 12.87695 | 0.39% | 4 | 13.8224 | 13.77692 | 0.33% | 5 | 28.836 | 28.70447 | 0.46% |
| = 150° | 1 | 8.91325 | 8.89121 | 0.25% | 2 | 10.1036 | 10.06659 | 0.37% | 3 | 12.9008 | 12.8508 | 0.39% | 4 | 13.7894 | 13.74465 | 0.33% | 5 | 28.841 | 28.71003 | 0.46% |
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