Intershaft Connection
Connections can be either rigid or flexible. The rigid case is an idealized model where the bearing stiffness is much larger than the stiffness of the connected shafts. In the flexible case, the displacements and rotations of both shafts are connected through an equivalent spring and damper.
Rigid Connection
For a rigid connection, a constraint is added to make the lateral displacement and tilting rotations of the both shafts equal. In the presence of misalignment in the bearing, these constraints should accommodate the misalignment too.
The first subscript refers to the local
y
or
z
components, and the second subscript refers to shafts or misalignment.
1
and
2
refers to the shafts, and
0
refers to the misalignment.
Flexible Connection
For the flexible case, spring-damper forces and moments proportional to the corresponding relative motion between the shaft are added:
and
Here
Misalignment values can be specified in the
Misalignment
node under
Multi-Spool Bearing
.
