Dynamic analysis of a 2-lobe geometrically imperfect journal bearing system. (July 2017)

• Record Type: Journal Article
• Authors: Jain, Dharmendra; Sharma, Satish C
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 231:Number 7(2017:Jul.)
• Page Start: 934
• Page End: 950
• Publication Date: 2017-07
• Subjects: 2-Lobe bearing -- geometric imperfection -- finite element method -- trajectories -- hybrid bearing; Tribology -- Periodicals; 621.89
• DOI: 10.1177/1350650116683087
• Languages: English
• ISSNs: 1350-6501

Abstract

The present study is concerned with the linear and nonlinear transient motion analysis of a 2-lobe geometrically imperfect hybrid journal bearing system compensated with constant flow valve restrictor. The trajectories of journal center motion for a geometrically imperfect rotating journal (barrel, bellmouth and undulation type journal) have been numerically simulated by solving the linear and nonlinear equations of motion of journal center using a fourth order Runga–Kutta method. The numerically computed results for the journal center trajectories indicate that the 2-lobe bearing( δ = 1 . 2 ) is more stable with geometrically imperfect journal as compared to the circular bearing with imperfect journal.