Table 3 Effects of Mass Changes on System Modes.
Modal category | Modal order | Modal characteristics | Case 1 | Case 2 | Case 3 |
|---|---|---|---|---|---|
The rigid body modes | 1 | Longitudinal rocking vibration | 2.79 | 3.72 | 2.64 |
2 | Vibrate vertically up and down | 3.52 | 4.96 | 3.52 | |
3 | Lateral rocking vibration | 3.61 | 5.70 | 4.05 | |
4 | Longitudinal rocking vibration | 5.78 | 7.63 | 5.44 | |
5 | Lateral rocking vibration | 6.35 | 7.70 | 5.46 | |
6 | Vertical torsional vibration t | 7.37 | 9.08 | 6.47 | |
The elastic modes | 7 | 1st order vertical bending | 27.79 | 28.24 | 28.19 |
8 | Torsional vibration | 37.10 | 46.32 | 45.71 | |
9 | Vertical 1st-order bending and torsion coupling | 40.60 | 49.59 | 49.22 | |
10 | 2nd order vertical bending | 77.55 | 121.92 | 121.57 | |
11 | 1st order lateral bending | 83.41 | 122.59 | 122.25 | |
12 | Transverse 1st-order bending-torsional vibration coupling | 90.40 | 128.08 | 127.69 |
