Complexity

Research Article

Kriging Metamodeling in Rotordynamics: Application for Predicting Critical Speeds and Vibrations of a Flexible Rotor

Table 18

Relative generalization error on the mean of the critical speeds for different regression orders and correlation functions. Symmetric case with 120 samples.
 GaussianLinearExponentialCubic
Zero-order regression
 7.96 2.17 7.93
 2.21 1.18 3.00
 1.04 10−56.97 2.24
 1.39 10−55.74 1.14
 3.52 4.46 6.85
 1.89 4.65 5.92
 1.49 4.26 4.67
 1.10 4.00 3.22
First-order regression
 8.01 7.46 4.25
 2.12 10−47.99 7.88
 1.44 6.19 5.18
 2.76 4.46 4.02
 2.95 1.62 1.12
 4.34 1.70 1.15
 7.43 4.33 3.09
 3.67 1.49 1.05
Second-order regression
 7.06 10−52.16 1.35
 3.42 5.39 5.23
 3.62 9.16 1.09
 4.97 7.20 9.91
 2.80 10−72.70 2.43
 4.15 10−83.91 3.29
 5.62 10−91.39 1.29
 2.73 10−102.62 2.29