Abstract
A comparative study on linear and nonlinear transient stability analysis of a meso scale rotor supported on gas foil journal bearings is carried out. Steady and unsteady Reynolds equations are solved by using the control volume formulation with a power law scheme and the Gauss–Seidel method. The modal impedance and the time domain orbit simulation are used to obtain the stability parameter: the threshold rotor mass for the linear and nonlinear transient methods respectively. The modal impedance is calculated by using the linear stiffness and damping coefficients. However, the orbit simulation solves explicitly the journal equations of motion, the compressible unsteady Reynolds equation and the equation of foil deformation. The threshold rotor mass which gives the stability threshold value for a given operating speed and load is obtained. It is found that there is a significant difference between the values of threshold rotor mass predicted by the linear and nonlinear transient stability methods.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
