Complexity

Research Article

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

Table 15

Relative generalization error on the variance of the critical speeds for different regression orders and correlation functions. Symmetric case with 350 samples.
 GaussianLinearExponentialCubic
Zero-order regression
 2.78 2.24 1.75
 1.14 1.28 1.18
 6.69 6.62
 4.72 4.13 3.97
 8.04 8.79 8.38
 1.41 5.43 8.73
 2.11 1.05 2.42
 9.43 6.25 9.04
First-order regression
 1.63 1.61 10−31.62
 1.11 10−21.12 1.11
 6.77 6.67 7.17
 3.78 3.82 3.80
 8.04 8.37 8.22
 1.41 3.44 2.53
 2.11 5.47 3.75
 9.43 5.10 2.68
Second-order regression
 1.65 1.66 1.64
 1.11 1.11 1.11
 6.58 6.57 10−26.70
 3.77 3.81 3.75 10−2
 8.04 10−38.14 8.11
 1.41 10−51.66 1.58
 2.11 10−52.13 2.13
 9.43 10−82.44 1.74