Effects of surface waviness on the non-linear vibration of gas lubricated bearing-rotor system

This paper presents the effects of the surface
waviness on the nonlinear dynamic performance of a gas bearing-rotor system. The
coupled vibration with the elastomer is taken into consideration to fit the actual
engineering application. The effects of the directions, the amplitudes and the numbers
of waves to the nonlinear dynamic performance are investigated. The results
show that the existence of the surface waviness in circumferential direction
can improve the stability of the system obviously. But the surface waviness in
axial direction is damage to the system. The nonlinear dynamic performance of
the system is insensitive to the number of surface waviness. The increase of
the amplitude of the waviness in circumferential
direction can improve the stability of the system.