Complexity

Research Article

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

Table 7

Relative generalization error on the mean of the critical speeds for different regression orders and correlation functions. Nonsymmetric case with 600 samples.
 GaussianLinearExponentialCubic
Zero-order regression
 1.87 10−36.37 3.18
 5.47 5.36 4.09 10−3
 6.14 10−58.23 2.80
 2.06 5.09 6.69 10−5
 5.36 10−125.87 1.07
 7.71 10−126.03 9.83 10−5
 1.36 10−105.83 9.33
 3.90 10−105.75 8.86
First-order regression
 1.38 10−33.85 2.40
 3.24 7.49 2.08 10−3
 2.82 10−51.46 8.70
 2.86 10−51.12 9.51
 8.26 10−131.16 3.89
 2.09 10−132.78 8.76
 1.03 10−103.13 1.21
 3.51 10−109.40 3.77
Second-order regression
 8.93 10−42.25 1.70
 2.19 10−36.60 3.26
 8.02 10−64.64 3.35 10−5
 1.15 10−56.27 5.20
 2.51 10−133.02 1.93
 1.74 10−134.49 2.13
 1.23 10−104.69 3.76
 3.37 10−106.96 2.63