How to set Pattern Repetition in Topology Optimization

linear and circular grouping is available only for Topography optimizaiton. For topology, symetry constraints, and pattern repetition are available, alongside with draw direction, extrusion, overhang and 5-axis milling.

https://2021.help.altair.com/2021/hwsolvers/os/topics/solvers/os/topology_opt_combine_pattern_rep_group_with_other_mfg_constraints_r.htm#topography_opt_circular_pattern_group_r

Thanks for the answer. I would like to ask you a question about the picture. How should I implement it specifically for my case, will I have to define 2 topology variables?

this is pattern repetition. Indeed you would need 2 deisgn variables (DTPG). One of them would be the primary driver, and the other one would be the follower. The same result pattern will be used for both regions.

You need to specify 3 nodes as reference for the primary and other 3 nodes for the secondary/follower.