Research Article
Research on Vibration Fatigue Damage Locations of Offshore Oil and Gas Pipelines Based on the GA-Improved BP Neural Network
Table 8
BP neural network location results with (%) noise.
| Test conditions | Actual position (mm) | Identification results (MM) | Absolute error (mm) | Relative error (%) |
| 1 | 5790 | 5436.00 | 354.00 | 5.96 | 2 | 5240 | 5207.00 | 33.00 | 0.56 | 3 | 4790 | 4793.96 | 3.96 | 0.07 | 4 | 3740 | 3690.84 | 49.16 | 0.83 | 5 | 3690 | 3405.37 | 284.63 | 4.79 | 6 | 2990 | 3047.23 | 57.23 | 0.96 | 7 | 2240 | 2246.63 | 6.63 | 0.11 | 8 | 1790 | 1894.31 | 104.31 | 1.76 | 9 | 1690 | 1716.82 | 26.82 | 0.45 | 10 | 946.5 | 965.76 | 19.26 | 0.32 | 11 | 550 | 384.30 | 165.70 | 2.79 | Average | ā | ā | 100.43 | 1.69 |
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