Research Article
A Composite Method of Marine Shafting’s Fault Diagnosis by Ship Hull Vibrations Based on EEMD
Table 2
Main datum of hull vertical vibrations.
| | Speed | Point | | No. 5 | No. 6 | | Frequency (Hz) | Amplitude (g•10−4) | Frequency (Hz) | Amplitude (g•10−4) |
| | 33 r/min | — | — | — | — | | 41.1 r/min | 3.400 | 0.9989 | 3.467 | 0.9301 | | 42 r/min | 3.567 | 0.8932 | 3.550 | 0.756 | | 49.1 r/min | 1.670 | 1.297 | 1.667 | 1.355 | | 4.167 | 5.994 | 4.167 | 5.696 | | 50.0 r/min | 1.717 | 1.060 | 1.767 | 1.743 | | 4.200 | 7.055 | 4.200 | 6.325 | | 51.0 r/min | 1.717 | 1.168 | 1.717 | 1.161 | | 4.300 | 10.840 | 4.317 | 8.326 | | 55.1 r/min | 1.917 | 1.196 | 1.900 | 1.399 | | 4.750 | 10.920 | 4.767 | 9.544 | | 56.0 r/min | 1.900 | 2.157 | 1.900 | 2.474 | | 4.750 | 13.460 | 4.750 | 10.450 |
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