Table 2.
Natural frequencies of the cantilever beam (Hz).
| Mode No. | Mode Type | FEM | Theory | Modal Test | Maximum Difference (%) | ||
|---|---|---|---|---|---|---|---|
| Location 1 | Location 2 | Location 3 | |||||
| 1 | 1st Flexural | 12.135 | 12.071 | 12.29 | 12.3 | 12.32 | 2.02 |
| 2 | 2nd Flexural | 76.029 | 75.651 | 77.06 | 77.08 | 77.15 | 1.94 |
| 3 | 1st Lateral | 120.44 | n/a | 119.5 | n/a | n/a | 0.79 |
| 4 | 3rd Flexural | 212.89 | 211.85 | 215.2 | 215.4 | 215.5 | 1.69 |
| 5 | 1st Torsional | 341.41 | n/a | n/a | n/a | n/a | n/a |
| 6 | 4th Flexural | 417.28 | 415.14 | 422.4 | 422.5 | 422.9 | 1.83 |
| 7 | 5th Flexural | 690.06 | 686.19 | 698.3 | 698.3 | 698.9 | 1.81 |
| 8 | 2nd Lateral | 739.77 | n/a | n/a | n/a | n/a | n/a |
| 9 | 2nd Torsional | 1026.7 | n/a | n/a | n/a | n/a | n/a |
| 10 | 6th Flexural | 1031.3 | 1025.1 | 1044 | 1044 | 1044 | 1.81 |