Research Article
Differential Equations of Motion for Naturally Curved and Twisted Composite Space Beams
Table 2
The first five frequencies of Beam 2 (made of unidirectional composite material).
| Mode number (Hz) | FEM | Present study (PS) | Warping ignored | Errors (%) | Warping included | Errors (%) |
| 1 | 351.54 | 512.80 | 45.87 | 358.21 | 1.89 | 2 | 675.19 | 981.32 | 45.34 | 687.63 | 1.84 | 3 | 787.86 | 1117.87 | 41.89 | 805.74 | 2.27 | 4 | 880.95 | 1200.09 | 36.23 | 903.08 | 2.51 | 5 | 940.96 | 1357.22 | 44.24 | 958.56 | 1.87 |
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