Dynamic Characteristics and Stability of Short Wave Journal Bearings

Abstract

A general analysis has been done to investigate the dynamic performance and stability of short wave journal bearing. Reynolds equation is solved for unsteady-state operations. The unsteady analysis has been used to determine the rotor dynamic coefficients for various eccentricity ratios and wave eccentricity ratios. These coefficients has been used to determine the stability parameters such as critical mass and whirl ratio to show that wave bearing provides better stability at higher speed than circular bearing.

Keywords

• short bearing
• wave geometry
• rotor dynamic behavior
• whirl ratio
• critical mass