Converge iterations based on a desired reaction force

Hello,

I'd like to know if there's a way to conclude/cut-off an on-going iteration before it reaches the subcase termination time? I'm running a geometric non-linear explicit dynamic subcase.

I want to base this iteration cut-off criteria once the rigid wall reaction force reaches a specific value...This should speed-up my topology optimization considerably...

If not then, is there a way to define a constrain on the rigidwall reaction force ? I'm referring to the reaction force that we read from the 'T01' file...

Thanks !!