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	—	—	97.64	1.64