Effects of Mount Angle on Dynamic Stability Performance ofMicropolar Lubricated Hydrodynamic Two Lobe Journal Bearing

In this research the effects of mount angle on dynamicperformance of micropolar lubricated hydrodynamicnoncircular two lobe journal bearings are investigated.For this purpose modified governing Reynolds equationin transient state is derived using the micropolarlubrication theory and then it is solved by generalizeddifferential quadrature (GDQ) method. In this way thesteady state and dynamic performance characteristics oftwo lobe bearings in terms of load carrying capacity,whirl frequency ratio and critical mass parameter arepresented for different values of mount angle. Resultsshow that against plain circular journal bearings,orientation of noncircular bearings can affect their steadystate and stability performance parameters. It is obviousfrom the results that achieving optimum static anddynamic performance parameters is possible only bychoosing a particular value of mount angle in the case ofanalyzed noncircular two lobe bearings.

کلیدواژه ها:

Hydrodynamic micropolar lubrication ، Twolobe journal bearing ، Mount angle ، Dynamic stabilityanalysis ، GDQ method