Perpendicular vibrations induced by friction on a flat bearing pad is a common problem in mechanical industries. Such a coupled vibration appears as one of the characteristics for sliding squeals that might affect the bearing efficiency. The presented numerical work shows that the cyclic out-of-plane motion within a bearing pad is possible, if the vertical motion is triggered and the contact pressure, the friction, the relative sliding velocity, and material property are appropriate. The magnitude of the squeal is sensitive to the contact pressure, the friction, the damping and material property. Its initiation time may also differ due to the changes in these parameters. In the present analysis, a simplified analytical model is also proposed to explain why the horizontal free vibration can become forced vibration and to further study this phenomenon. More over, under a certain condition, a surface-freeze is observed on the contact interface. It is a potential direction heading toward the complete elimination of the squeal.

This content is only available via PDF.
You do not currently have access to this content.