Complexity / 2018 / Article / Tab 8

Research Article

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

Table 8

Relative generalization error on the variance of the critical speeds for different regression orders and correlation functions. Nonsymmetric case with 600 samples.

GaussianLinearExponentialCubic

Zero-order regression
1.21 1.08 3.97 104
1.51 7.07 1043.81
9.90 1.08 4.26 103
5.97 4.14 2.99 103
7.91 10122.83 5.46
4.16 10124.53 7.63
6.50 10107.07 1.71
3.08 1095.70 8.79

First-order regression
3.75 2.90 1.71 104
9.63 7.63 5.33 104
8.16 1.10 4.93 103
4.17 4.33 2.41 103
1.81 10111.15 6.70
5.73 10121.62 1.01
7.46 10103.33 1.19
3.28 1094.25 1.45

Second-order regression
6.40 1051.13 6.92
7.06 6.72 3.25 104
4.89 9.43 3.54 103
2.50 3.54 1.49 103
7.46 10121.55 8.43
9.90 10136.36 3.50
7.25 10101.34 1.12
3.15 1098.30 3.53