About the Model
In the following figure, the initial model is illustrated. The boundary
elements of the rear side are pin-fixed while the load case consists of a concentrated force
and moment in the center.
The design nodes for the optimization are the inner nodes of the six rim holes. The
neighboring nodes can be moved because of the mesh smoothing feature. The inner and outer side of
the rim should be manufacturable by turning, there a turning constraint is applied on these
regions. In addition, a rotational symmetry and stamping constraint for the six rim holes is
defined.