Complexity / 2018 / Article / Tab 6

Research Article

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

Table 6

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

GaussianLinearExponentialCubic

Zero-order regression
(151.85; 1.18)(76.12; 1.66)(58.14; 0.92)(166.04; 2.84)
(48.74; 0.78)(21.74; 0.67)(12.19; 0.39)(77.41; 0.72)
(10.58; 0.19)(11.05; 0.33)(11.89; 0.22)(7.44; 0.17)
(12.40; 0.23)(7.52; 0.41)(8.02; 0.27)(6.32; 0.21)
(0.00; 0.00)(0.67; 0.02)(0.29; 0.01)(1.29; 0.04)
(0.00; 0.00)(2.29; 0.07)(0.78; 0.02)(5.00; 0.14)
(0.00; 0.00)(1.01; 0.03)(0.69; 0.01)(2.27; 0.05)
(0.00; 0.00)(0.49; 0.01)(0.16; 0.00)(1.11; 0.03)

First-order regression
(72.82; 0.72)(46.36; 0.86)(46.19; 0.55)(61.98; 1.10)
(39.81; 5.32)(13.20; 0.52)(18.12; 0.41)(12.17; 0.30)
(8.74; 0.20)(11.41; 0.33)(12.06; 0.23)(7.91; 0.17)
(10.79; 0.18)(9.42; 0.40)(9.06; 0.26)(9.33; 0.17)
(0.00; 0.00)(0.72; 0.01)(0.60; 0.01)(1.23; 0.02)
(0.00; 0.00)(0.78; 0.01)(0.68; 0.01)(1.31; 0.01)
(0.00; 0.00)(0.34; 0.01)(0.25; 0.00)(0.60; 0.01)
(0.00; 0.00)(0.02; 0.00)(0.01; 0.00)(0.03; 0.00)

Second-order regression
(15.47; 0.29)(35.98; 0.50)(39.75; 0.38)(27.97; 0.33)
(148.91; 4.25)(12.84; 0.42)(16.13; 0.37)(16.10; 0.25)
(6.95; 0.15)(11.16; 0.32)(11.05; 0.21)(8.06; 0.13)
(7.37; 0.15)(7.06; 0.31)(7.70; 0.23)(6.55; 0.13)
(0.00; 0.00)(0.19; 0.01)(0.16; 0.00)(0.33; 0.01)
(0.00; 0.00)(0.08; 0.00)(0.06; 0.00)(0.13; 0.00)
(0.00; 0.00)(0.03; 0.00)(0.03; 0.00)(0.05; 0.00)
(0.00; 0.00)(0.00; 0.00)(0.00; 0.00)(0.01; 0.00)