Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Turbocharger assembly with FABs: (a) turbocharger schematic and (b) cross section of FAB

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Turbocharger rotor: (a) rotor FE model and (b) free–free rotor modes at zero rotor speed

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: FAB journal trajectories at 5000 rpm from default initial conditions over 20 revolutions, test 1: (a) FAB1 and (b) FAB2 (SS: steady-state)

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: SESA results for tests 1–3: (a) perturbation exponential growth factor and (b) ratio of perturbation frequency to rotor speed

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Divergence of FAB journal trajectories at 6000 rpm from 1% perturbed static equilibrium over 200 revolutions, test 1: (a) FAB1 and (b) FAB2

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Divergence of FAB journal trajectories at 100,000 rpm from 1% perturbed static equilibrium over 250 revolutions, test 1: (a) FAB1 and (b) FAB2

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Frequency spectra of the test 1 limit cycles (FAB1, y-direction): (a) 6000 rpm and (b) 100,000 rpm

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: SESA results (perturbation exponential growth factor): tests 3–5 and tests 6–8

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: FAB journal trajectories at 100,000 rpm test 7 over last 50 rev/s out of 200 rev/s from 20% perturbed static equilibrium: (a) FAB1 and (b) FAB2

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Foil journal bearing test apparatus [21]

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Analyzer output for probe Ry at turbine end; coastdown from 2200 rev/s [21]

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: SESA results for experimental rig in Fig. 10: (a) perturbation exponential growth factor and (b) perturbation frequency

Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Nonlinear Dynamic Analysis of High Speed Oil-Free Turbomachinery With Focus on Stability and Self-Excited Vibration J. Tribol. 2014;136(4):041705-041705-10. doi:10.1115/1.4027859 Figure Legend: Frequency spectrum of limit cycle at 2200 rev/s of right-hand FAB in Fig. 10 (y vibration): (a) predicted and (b) measurement from Ref. [21]