A comparative linear and nonlinear dynamic analysis of compliant cylindrical journal bearings

Nonlinear dynamic behaviour of vertical and horizontal rotors in compliant liner tilting pad journal bearings: Some design considerations

“…The final journal equilibrium orbits in the viscoelastic case are located in between the orbits for white metal and purely elastic cases. Furthermore, dynamic behaviour of the compliant bearings can be controlled by changing properties of the liner material [8]. Tilting pads with compliant liners also show similar trends when supporting a horizontal rotor.…”

“…Pressure at the pad edges is set to ambient. A density-pressure cavitation model is implemented as shown in [8,9]. Saturation pressure is set to 20 kPa.…”

“…The viscoelastic properties of the PTFE layer (4 mm) were measured as described in [8] to fit a generalized Maxwell model. These properties are given in Table 3.…”

“…In this paper we study the effect of alternative liner materials on bearing response. Such materials are elastic polymers, and as previous studies showed [1][2][3][4][5][6][7][8][9], provide significant advantages over white metal. For example, a polytetrafluoroethylene (PTFE) liner reduces break-away friction during start-ups [1].…”

“…Viscoelastic characteristics of compliant liners in plain cylindrical journal bearings have been considered in [8]. The final journal equilibrium orbits in the viscoelastic case are located in between the orbits for white metal and purely elastic cases.…”