|
| Stop band | | Section group #1 | | Section group #2 |
| In-plane | Out-of-plane | In-plane | Out-of-plane |
|
| Wave A | 1st∼3rd | -- | Torsion about the vertical axis | 1st | Horizontal translation | -- |
| 4th∼6th | Rotation of the foot | -- | Small rotation about the longitudinal axis |
| 2nd | Rotation of the foot | -- |
| Horizontal translation of the head |
| Bending of the web |
| Bending of the web | | 3rd | Same as previously mentioned (with larger amplitudes) | -- |
| Out-of-phase bending of the foot ends | | 4th∼6th | -- | Torsions of the head and web about the vertical axis |
| The horizontal translation of the head diminishes with the increasing frequency | | | | Torsion of the foot about the horizontal axis; the higher-order stop band has the larger amplitude |
|
| Wave B | 1st | -- | Rotation about the horizontal axis | 1st | Vertical translation | -- |
| Negligible foot flapping |
| 2nd∼4th | -- | S-shape deformations | 2nd∼4th | With the increasing frequency, the foot flapping becomes dominant, and the vertical translation of the head diminishes | -- |
| 5th | Vertical deformation of the web | -- | 5th | -- | S-shape deformations |
| Significant foot flapping |
|
| Wave C | 1st | -- | Torsion about the vertical axis | 1st | Rotation of the cross section | -- |
| Small bending of the web |
| 2nd | -- | Torsion of the foot about the vertical axis | 2nd | Bending of the web | -- |
| Rotation of the foot |
| 3rd∼4th | -- | Torsion of the head about the vertical axis | 3rd∼4th | High-order bending of the web | -- |
| Torsion of the foot about the horizontal axis | Out-of-phase bending of the foot ends |
| Horizontal translation of the head |
| The center of the foot is immobile |
|
| D | 1st∼3rd | -- | Torsion about the vertical axis; the higher-order stop band has the larger amplitude | 1st∼2nd | Bending of the web | -- |
| 3rd | Bending of the web | -- |
| Rotations of the head and the foot |
| Horizontal translation of the foot |
|
| E | 1st | Tension and compression of the web | -- | 1st | -- | Longitudinal translation |
| Foot flapping |
| Small bending of the cross section |
| 2nd | -- | Longitudinal translation | 2nd | Tension and compression of the web | -- |
| Bending of the cross section | Foot flapping |
| The center of the foot is immobile |
|
| F | 1st∼2nd | -- | Torsion about the vertical axis | 1st∼2nd | High-order bending of the web | -- |
| Out-of-phase bending of the foot ends |
| Rotation of the head |
| The center of the head is immobile |
|
| G | 1st | -- | S-shape deformations | 1st | Tension and compression of the web | -- |
| Foot flapping |
|
