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Table 2 Comparison of model identification results

From: Elastic–plastic model identification for rock surrounding an underground excavation based on immunized genetic algorithm

 

E/MPa

μ

α

K/MPa

Theory values

2157

0.2

0.165872

0.875726

Identified values by GA

2135

0.182

0.171365

0.853471

Relative error of computing results for GA (%)

1.02

9

3.31

2.54

Identified values by FGA

2140

0.182

0.168442

0.853532

Relative error of computing results for FGA (%)

0.79

9

1.55

2.54

Identified values by IGA

2143

0.188

0.167812

0.854621

Relative error of computing results for IGA (%)

0.65

6

1.17

2.41