Table 2 Computed result of back analysis.
From: Back analysis of mechanical parameters based on GPSO-BP neural network and its application
Model | Parameter | \(E (\text{GPa})\) | \(\mu\) | \(\varphi (^\circ )\) | \(c (\text{MPa})\) |
|---|---|---|---|---|---|
Target value | 1.9000 | 0.3200 | 27.0000 | 1.1000 | |
BP | Inversion value | 2.00567 | 0.29085 | 30.9638 | 1.26735 |
Relative error | 5.56% | − 9.11% | 14.68% | 15.21% | |
PSO-BP | Inversion value | 1.80546 | 0.33163 | 24.4953 | 1.1682 |
Relative error | − 4.98% | 3.64% | − 9.28% | 6.20% | |
GA-BP | Inversion value | 1.9856 | 0.3304 | 25.8425 | 1.1952 |
Relative error | 4.51% | 3.25% | − 4.29% | 8.65% | |
GPSO-BP | Inversion value | 1.90404 | 0.32148 | 28.6131 | 1.1732 |
Relative error | 0.21% | 0.46% | 5.97% | 6.65% |
