Practical determination and use of bearing dynamic coefficients

Abstract For four practically important journal bearing designs the stiffness and damping coefficients for ideal operating conditions were determined and their reliability ascertained by vibration measurements on high-speed rotors. The effects of static bearing misalignment, variable lubricant viscosity, inertial forces in the lubricant film and turbulent gap flow were investigated in detail. The significant effects on the static load capacity of the bearing and the stability behaviour of the rotor-bearing systems are illustrated and discussed.