| Full text | |
| Author(s): |
Machado, Tiago Henrique
;
Storti, Gustavo Chaves
Total Authors: 2
|
| Document type: | Journal article |
| Source: | NONLINEAR DYNAMICS OF STRUCTURES, SYSTEMS AND DEVICES, VOL I, NODYCON 2019; v. N/A, p. 8-pg., 2020-01-01. |
| Abstract | |
Wear of hydrodynamic bearings is one of the main causes of forced stops on machines and rotating systems. In this way, the purpose of this chapter is to investigate the time response effects of nonlinearities inserted by wear on hydrodynamic bearings in rotating systems. The rotor is modeled using traditional finite element method, and the Reynolds equation is solved by finite volume method, to evaluate the hydrodynamic bearing behavior. For the numerical time integrator, nonlinear Newmark scheme is used along with Newton-Raphson method to estimate the response at each time step. The orbit of the shaft inside the bearings revealed that for low speeds, even with the small size of orbits, the introduction of wear causes changes in center, size, and position of the orbits. At critical speed, the nonlinearities from the worn bearings became even more significant and tend to change dramatically the system response. In addition, the system response to different levels of rotating unbalanced mass proves the nonlinear profile due to the presence of wear on the hydrodynamic bearings. (AU) | |
| FAPESP's process: | 15/20363-6 - Fault tolerant identification and control of rotating systems |
| Grantee: | Katia Lucchesi Cavalca Dedini |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 17/07454-8 - Proposal of a theoretical-experimental model for rotor-bearing-structure interaction |
| Grantee: | Tiago Henrique Machado |
| Support Opportunities: | Regular Research Grants |