topology optimization with a certain displacement applied

Good night dear all.

I am looking for some help.

Look i have a cylinder the cylinder with two NON-Design plates, one at the bottom and one at the top (of course the cylinder is the DESIGN part). Then the bottom plate is fixed with 0 displacement and rotations and the top plate suffers a -1.0 mm compression in the Z direction.

Note: the bottom plate has an SPC and the top plate has an SPCD, and the load step is linear static

With that being said i want to optimize the cylinder, having such displacement -1.0 mm in the linear regime of course, and minimize the volume.

i tried the following tutorial "OS-T: 2010 Design Concept for an Automotive Control Arm" with my own modifications, however, i getting non sense results (the whole design part disappears).

Finally, i was wondering how to do a topology optimization setting a desire displacement?.

In the attached file you will find the FEM file.

Thanks in advance.

Alberto Campuzano