Complexity / 2018 / Article / Tab 5

Research Article

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

Table 5

% of the relative errors of the mean of critical speeds for different regression orders and correlation functions. Nonsymmetric case with 600 samples.

GaussianLinearExponentialCubic

Zero-order regression
(17.86; 0.29)(28.58; 0.65)(25.30; 0.36)(40.20; 0.81)
(10.94; 0.10)(10.33; 0.14)(12.82; 0.11)(8.58; 0.10)
(2.55; 0.02)(4.54; 0.16)(3.02; 0.08)(10.40; 0.27)
(3.37; 0.02)(4.07; 0.08)(0.99; 0.03)(11.01; 0.14)
(0.00; 0.00)(2.04; 0.06)(0.66; 0.02)(4.65; 0.11)
(0.00; 0.00)(2.22; 0.05)(0.74; 0.02)(5.15; 0.10)
(0.00; 0.00)(0.54; 0.01)(0.18; 0.00)(1.23; 0.03)
(0.00; 0.00)(0.31; 0.01)(0.10; 0.00)(0.70; 0.02)

First-order regression
(11.98; 0.25)(23.81; 0.50)(23.13; 0.30)(27.46; 0.56)
(6.51; 0.09)(12.64; 0.15)(14.28; 0.12)(7.42; 0.08)
(1.54; 0.02)(1.93; 0.07)(2.04; 0.04)(3.66; 0.10)
(0.86; 0.01)(1.33; 0.04)(1.59; 0.03)(1.69; 0.03)
(0.00; 0.00)(0.39; 0.01)(0.27; 0.00)(0.70; 0.01)
(0.00; 0.00)(0.11; 0.00)(0.07; 0.00)(0.26; 0.01)
(0.00; 0.00)(0.05; 0.00)(0.04; 0.00)(0.10; 0.00)
(0.00; 0.00)(0.01; 0.00)(0.00; 0.00)(0.01; 0.00)

Second-order regression
(8.98; 0.20)(20.97; 0.38)(21.40; 0.24)(16.80; 0.35)
(6.35; 0.08)(12.26; 0.14)(13.91; 0.12)(8.45; 0.08)
(0.63; 0.01)(1.22; 0.04)(1.57; 0.03)(1.11; 0.03)
(0.60; 0.01)(1.20; 0.03)(1.43; 0.02)(1.14; 0.02)
(0.00; 0.00)(0.07; 0.00)(0.06; 0.00)(0.11; 0.00)
(0.00; 0.00)(0.05; 0.00)(0.04; 0.00)(0.10; 0.00)
(0.00; 0.00)(0.00; 0.00)(0.00; 0.00)(0.00; 0.00)
(0.00; 0.00)(0.00; 0.00)(0.00; 0.00)(0.00; 0.00)