Use the Misalignment node to model the effect of the misalignment of bearings or couplings on the shaft. It can be added to all nodes describing bearings in the Solid Rotor and Beam Rotor interfaces, as well as to the Rotor Coupling node.

To model misalignment, you specify the parallel or angular misalignment values. For the stiffness-based bearing models such as Radial Roller Bearing, Journal Bearing, and Thrust Bearing, misalignment works similar to predeformation in springs. For the Hydrodynamic Bearings, the misalignment affects the film thickness distribution in the bearing which governs the pressure distribution in the film.

If added in a Solid Rotor, or Solid Rotor, Fixed Frame interface, enter the values of the parallel misalignment u0x and u0y (for radial or journal bearing only) and angular misalignment θ0x and θ0y.

If added in a Beam Rotor, or Hydrodynamic Bearing interface, enter the values of the parallel misalignment u0y and u0z (for radial or journal bearing only) and angular misalignment θ0y and θ0z.

Physics tab with Radial Roller Bearing, Journal Bearing, Thrust Bearing, Multi-Spool Bearing, or Rotor Coupling selected in the Solid Rotor, Solid Rotor, Fixed Frame, or Beam Rotor interfaces:

Physics tab with Hydrodynamic Journal Bearing, Hydrodynamic Thrust Bearing, or Floating Ring Bearing selected in the Hydrodynamic Bearing interface: