Online Archive of University of Virginia Scholarship
Non-linear transient analysis of a rigid rotor supported by non-circular bearings137 views
Author
Falkenhagen, George Louis, Mechanical and Aerospace Engineering, University of Virginia
Advisors
Gunter, Edgar J. , Mechanical and Aerospace Engineering, University of Virginia
Quarles, Lawrence R. , School of Engineering and Applied Science, University of Virginia
Abstract
The calculation of the complete transient path of the rotor is the best analytical method of evaluating the characteristics of a rotor-bearing system. This type of calculation requires the solution of Reynolds' equation for the hydrodynamic forces at each time step. Since a large number of time steps are involved (about 1,000) the computer run times are prohibitive in cost. Thus an accurate approximate solution to Reynolds’ equation that has a rapid execution rate would be invaluable for the determination of transient rotor orbits.
Reynolds’ equation is solved by an implicit numerical method for the case of a rotor supported by non-circular hydrodynamic bearings using compressible or incompressible lubricants. This exact method of determining hydrodynamic forces is used to verify the accuracy of an approximate method that is developed in the thesis. The approximate method consists of solving the infinite bearing problem and then correcting this solution for end leakage to obtain an approximation to the finite bearing.
Degree
PHD (Doctor of Philosophy)
Keywords
Bearings (Machinery); Lubrication and lubricants
Language
English
Rights
All rights reserved (no additional license for public reuse)
Falkenhagen, George Louis. Non-linear transient analysis of a rigid rotor supported by non-circular bearings. University of Virginia, Mechanical and Aerospace Engineering, PHD (Doctor of Philosophy), 2023-10-25, https://doi.org/10.18130/eqn1-jw92.
