Research Article
Research on Vibration Fatigue Damage Locations of Offshore Oil and Gas Pipelines Based on the GA-Improved BP Neural Network
Table 12
GA-BP neural network location results with 5% noise.
| Test conditions | Actual position (mm) | Identification results (MM) | Absolute error (mm) | Relative error (%) |
| 1 | 5790 | 5531.87 | 258.13 | 4.35 | 2 | 5240 | 5218.69 | 21.31 | 0.36 | 3 | 4790 | 4827.84 | 37.84 | 0.64 | 4 | 3740 | 3770.05 | 30.05 | 0.51 | 5 | 3690 | 3779.81 | 89.81 | 1.51 | 6 | 2990 | 3094.92 | 104.92 | 1.77 | 7 | 2240 | 2286.51 | 46.51 | 0.78 | 8 | 1790 | 1937.55 | 147.55 | 2.48 | 9 | 1690 | 1805.16 | 115.16 | 1.94 | 10 | 946.5 | 1080.22 | 133.72 | 2.25 | 11 | 550 | 639.05 | 89.05 | 1.50 | Average | ā | ā | 97.64 | 1.64 |
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