Add a Thrust Bearing node and select a point representing the locations of the thrust bearing.

If clearance is incorporated, you can also study the effect of misalignment by adding a Misalignment subnode.

Use the settings in this section to define the local y direction of the bearing. Subsequent vector and matrix inputs are specified in the local directions specified here.

Enter the Bearing orientation vector defining the local y direction. The direction given will be adjusted so that it is orthogonal to the rotor axis. The default value is the global y-axis.

You can further modify the y-axis orientation by entering an angle for the Rotation of the orientation vector around the bearing axis. The direction inferred from the previous setting will be rotated counterclockwise around the rotor axis.

Select a Bearing Model — No clearance, Total spring and damping constant, or Total force and moment. Then, go to the relevant section below to continue defining the properties.

Enter the axial and bending stiffness, ku and kθ. Select the Translational-rotational coupling checkbox to also model the coupling between the axial and rotational motion of the collar. Enter expressions for the additional inputs, kuθ and kθu in this case. If you want to perform dynamic analysis, you can also enter the values of the axial and bending damping constants cu and cθ. Select the Translational-rotational coupling checkbox and enter cuθ and cθu values to include the translational-rotational coupling in damping constants.

Enter the Total force, Ftot and Total moment, Mtot, as functions of collar displacement and rotation.

Select the Constrain lateral motion checkbox (cleared by default) if you do not want to use the Journal Bearing node to restrict the lateral motion. Default expressions are provided as an example of how to specify the forces and moments as a function of collar displacement and rotation. These expressions contain variables of the type <phys>.<feat>.{du1, dth2, dth3}, which are the axial component of the collar displacement and lateral components of the collar rotation, respectively, in the local bearing directions.

Select one of the Fixed, Moving, or Flexible foundation options. If the model component also contains other structural physics interfaces such as Solid Mechanics, Multibody Dynamics, and Shell that have Attachment or Rigid Domain features, the above list is extended with the list of the attachments and rigid domains available in these physics interfaces. In the Moving and Flexible cases, the subnodes Moving Foundation or Flexible Foundation are automatically added. If any of the attachments or rigid domains is selected, displacement and rotation of the selected feature are used as foundation motion. Attachments and rigid domains provide an easy way of coupling the rotor with the stator.

Physics tab with Beam Rotor selected: