Hrvatska znanstvena Sekcija img
3 gif
 O projektu
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 942207


Autori: Ruggiero, Alessandro; D’Amato, Roberto; Magliano, Emanuele; Kozak, Drazan
Naslov: Dynamical simulations of a flexible rotor in cylindrical uncavitated and cavitated lubricated journal bearings
Izvornik: Lubricant 2018 (2018), 6 (2);
Vrsta rada: članak
Ključne riječi: rotor dynamics ; journal bearing ; cavitation ; Matlab-Simulink algorithm
Due to requirements of their operating conditions, such as high speed, high flexibility and high efficiency, rotating machines are designed to obtain larger operating ranges. These operating conditions can increase the risk of fluid-induced instability. In fact, the presence of non-linear fluid forces when the threshold speed is overcome by the rotational speed, can generate rotor lateral self-excited vibrations known as “oil whirl” or “oil whip”. These instabilities derive from the interaction between the rotor and the sliding bearing and they are typically sub-synchronous and they contribute to eventual rubbing between rotor and stator with consequent damage to the rotating machines. For these reasons, the aim of this paper is to numerically investigate the differences in the dynamic behaviour of a flexible rotor supported by cylindrical lubricated journal bearings. The study considers two different cases, uncavitated and cavitated lubricated films, in order to develop an original Matlab-Simulink algorithm for the numerical solution of the differential non-linear equations of motion of the unbalanced flexible rotor supported on hydrodynamic journal bearings. The bearings were modelled as uncavitated and cavitated (π-Film) short bearings derived from classical Reynolds’ theory. Dynamic simulation allowed prediction of the shape and size of the orbit performed by the system and evaluation of the vibrating phenomena exerted by the rotor during the motion. The results show that cavitation completely modifies the behaviour of the system in every aspect. The analysis of the diagrams obtained showed that the proposed algorithm provides consistent results and represents a valuable instrument for dynamic analysis of rotating systems.
Projekt / tema: 152-1201910-1909
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Emerging Sources Citation Index (ESCI) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
URL Internet adrese:
Broj citata:
DOI: 10.3390/lubricants6020040
URL cjelovitog teksta:
Google Scholar: Dynamical simulations of a flexible rotor in cylindrical uncavitated and cavitated lubricated journal bearings
Upisao u CROSBI: Drazan Kozak (, 10. Lip. 2018. u 16:22 sati

  Verzija za printanje   za tiskati