Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Analysis of stability and bifurcation response of rigid rotor supported by squeeze film damper in presence of cavitation

Abstract
In the present paper, the dynamic response of the rigid rotor system, along with the journal of bearing and squeeze film dampers, has been investigated with the approach to investigate the effect of increased clearance. In the analysis of  tability and bifurcation, the response of the system has been used by Floquet method. The simulation of the hydrodynamic model of the oil film for the journal bearing and squeeze film dampers was carried out by using the integration method of the relationship between the distribution of pressure obtained through the Reynolds equation in the oil film across the surface of the bearing and damper. The effect of the bearing clearance on the system response has been investigated for different rotational speeds with the constant maintenance of other parameters of the system. The results show that the response of the system is strongly influenced the clearance parameter of bearing and it is shown that infinitesimal change in this parameter leads to aggressive changes in system behavior in some ranges of rotational speed.

Subjects


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Volume 19, Issue 3 - Serial Number 48
System Dynamics and Solid Mechanics
Autumn 2016
Pages 24-41

  • Receive Date 28 October 2015
  • Revise Date 14 March 2016
  • Accept Date 09 November 2017