Research Article
Modal Analysis for a Rod-Fastened Rotor considering Contact Effect Based on Double Fractal Model
Table 4
Calculated results of flexural vibration modal frequencies of the experimental rod-fastened rotor.
| | Case | Pretightening force (N) | Nominal contact pressure, P0 (MPa) | Dimensionless load coefficient, ξ (C2) | 1st order (Hz) | 2nd order (Hz) | 3rd order (Hz) | 4th order (Hz) | 5th order (Hz) |
| | 1 | 33750 | 1.492 | 0.377 | 145.40 | 206.85 | 574.38 | 730.45 | 876.57 | | 2 | 56250 | 2.487 | 0.226 | 145.66 | 206.99 | 577.77 | 731.33 | 880.96 | | 3 | 113400 | 5.013 | 0.112 | 145.89 | 207.12 | 580.84 | 732.03 | 885.13 | | 4 | 228600 | 10.106 | 0.055 | 146.04 | 207.19 | 582.78 | 732.50 | 891.86 | | 5 | 282186 | 12.475 | 0.045 | 146.31 | 207.25 | 584.58 | 732.91 | 892.90 |
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