Research Article
A Composite Method of Marine Shafting’s Fault Diagnosis by Ship Hull Vibrations Based on EEMD
Table 3
Main data of hull longitudinal vibrations.
| | Speed | Point | | No. 3 | No. 4 | | Frequency (Hz) | Amplitude (g•10−4) | Frequency (Hz) | Amplitude (g•10−4) |
| | 33 r/min | 2.333 | 1.044 | 2.333 | 1.276 | | 41.1 r/min | 3.483 | 2.988 | 3.483 | 2.411 | | 42 r/min | 3.550 | 4.136 | 3.55 | 3.008 | | 49.1 r/min | 4.167 | 9.697 | 4.167 | 9.435 | | 50.0 r/min | 4.217 | 7.567 | 4.217 | 7.608 | | 50.0 r/min | 4.300 | 11.550 | 4.300 | 11.87 | | 55.1 r/min | 4.767 | 9.442 | 4.767 | 11.01 | | 56.0 r/min | 4.750 | 11.340 | 4.750 | 12.96 |
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