Research Article
Propeller Excitation of Longitudinal Vibration Characteristics of Marine Propulsion Shafting System
Table 2
Calculated stiffness and damping of oil film based upon equivalent viscosity and variable viscosity.
| Shafting rotating speed (rpm) | 40 | 60 | 80 | 100 |
| Stiffness N/m) | | | | | Variable viscosity | 0.59 | 1.66 | 3.38 | 6.06 | Equivalent viscosity | 0.63 | 2.09 | 4.51 | 7.80 | Damping N/m) | | | | | Variable viscosity | 1.94 | 3.63 | 5.43 | 7.90 | Equivalent viscosity | 2.83 | 9.20 | 16.14 | 22.32 |
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