Table 3.
Natural frequencies’ analysis: frequencies of the main mode shapes of the Mastio tower of the San Felice sul Panaro Fortress. Comparison between the voxel-based model and the CAD-based model.
| Mode No. | Voxel Frequency (Hz) | CAD Frequency (Hz) | Error (%) | Mode Description |
|---|---|---|---|---|
| 1 | 1.9131 | 1.9137 | 0.031% | 1st bending mode (E-W) |
| 2 | 1.9276 | 1.9289 | 0.067% | 1st bending mode (N-S) |
| 3 | 4.5437 | 4.4253 | 2.675% | torsional mode |
| 4 | 7.0804 | 7.3518 | 3.692% | 2nd bending mode (E-W) |
| 5 | 7.1654 | 7.3665 | 2.730% | 2nd bending mode (N-S) |
| 6 | 8.1623 | 8.0055 | 1.959% | axial mode |