Table 1 Partial stiffness and damping parameters of mainframe
From: Dynamic Characteristics Analysis with Multi-Directional Coupling in a TBM Mainframe
| Â | Cutterhead | Main drive | Main girder 1 | Gripper shoes |
|---|---|---|---|---|
Lateral stiffness (N m) | 1.15 × 1010 | 5 × 109 | 6.38 × 108 | 8.68 × 1010 |
Overturning stiffness (N m) | 1.56 × 1011 | 6.16 × 1010 | 5.7 × 109 | 2.11 × 1011 |
Tunneling stiffness (N m) | 4.72 × 1010 | 2.5 × 109 | 1.8 × 1010 | 3.36 × 1010 |
Lateral damping (N s/m) | 1.75 × 106 | 1.04 × 106 | 1.47 × 105 | 1.84 × 106 |
Lateral damping (N s/m) | 3.55 × 106 | 7.35 × 105 | 7.9 × 105 | 1.14 × 106 |
Lateral damping (N s/m) | 4.64 × 106 | 3.91 × 106 | 4.36 × 105 | 5.5 × 106 |