Analysis of dynamic characteristics of hydrodynamic journal bearings with isotropic roughness effects

Wear ◽  
1993 ◽  
Vol 167 (2) ◽  
pp. 173-179 ◽  
Author(s):  
S.K. Guha
Keyword(s):  
Dynamic Characteristics ◽  
Journal Bearings ◽  
Roughness Effects

scholarly journals Dynamic Characteristics of the Oil Film in Journal Bearings

1982 ◽  
Vol 1982 (151) ◽  
pp. 292-298 ◽  
Author(s):  
Yoshiyuki Yamamoto ◽  
Hideomi Ohtsubo ◽  
Shin Morishita
Keyword(s):  
Dynamic Characteristics ◽  
Journal Bearings ◽  
Oil Film

Application of the Hopf bifurcation theory to limit cycle prediction of short journal bearings with isotropic roughness effects

2007 ◽  
Vol 221 (8) ◽  
pp. 869-879 ◽  
Author(s):  
J-R Lin
Keyword(s):  
Surface Roughness ◽  
Hopf Bifurcation ◽  
Limit Cycles ◽  
Critical Region ◽  
System Parameter ◽  
Journal Bearings ◽  
Roughness Effects ◽  
Critical Limit ◽  
Bifurcation Behaviour ◽  
Bearing System

On the basis of the Christensen stochastic theory, the effects of isotropic surface roughness upon the bifurcation behaviour of a short journal-bearing system are investigated. By applying the Hopf bifurcation theorem to the non-linear equations of motion of rough journal bearings, the steady-state performance, the linear characteristics, and the weakly non-linear bifurcationphenomenaarepresented. For the short bearing with length-to-diameter ratio l = 0. 5, the onset of oil-whirl rough bearing system can manifest a bifurcation behaviour exhibiting subcritical limit cycles or super-critical limit cycles for running speeds near the bifurcation point. For a particular system parameter, the effects of isotropic surface roughness are found to enlarge the size of sub-critical limit cycles and super-critical limit cycles when the Hopf bifurcation occurs. On the whole, the roughness effects of isotropic surface patterns upon the Hopf bifurcation phenomena of the short-bearing system are more pronounced for a smaller system parameter ( p = 0. 4 in the sub-critical region and Sp = 0. 05 in the super-critical region) and a higher roughness parameter (Λ = 0. 4).

scholarly journals Dynamic Characteristics and Stability of Short Wave Journal Bearings

2010 ◽  
Vol 5 (2) ◽  
pp. 92-95 ◽  
Author(s):  
Satyam Shivam Gautam ◽  
Leela Meena ◽  
Mihir Kumar Ghosh
Keyword(s):  
Dynamic Characteristics ◽  
Short Wave ◽  
Journal Bearings
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