I have been told about "Spin Softening" option for rotating cylinders in Ansys but did not really understand how/what/why. I have gone thru Ansys documentation and it appears that the centrifugal loads are applied to the deformed configuration if the Spin Softening option is selected. Does Abaqus have a similar option ?

Now what the "Spin Softening" is meant to do is apply a centrifugal force:

F(r) = density*(r+u)*speed^2

where u is the radial deformation. Most classical equations ignore this and assume that the force is applied only on the undeformed configuration.