Research on Vibration Fatigue Damage Locations of Offshore Oil and Gas Pipelines Based on the GA-Improved BP Neural Network

Table 7

Location results of the BP neural network without noise.

Test conditions	Actual position (mm)	Identification results (MM)	Absolute error (mm)	Relative error (%)
1	5790	5514.29	275.71	4.64
2	5240	5186.30	53.70	0.90
3	4790	4765.57	24.43	0.41
4	3740	3689.72	50.28	0.85
5	3690	3440.52	249.48	4.20
6	2990	2992.89	2.89	0.05
7	2240	2249.20	9.20	0.15
8	1790	1804.58	14.58	0.25
9	1690	1738.48	48.48	0.82
10	946.5	926.59	19.91	0.34
11	550	438.78	111.22	1.87
Average	—	—	78.17	1.32