Constraints https://www.lsoptsupport.com/examples/subpages/ansa/constraints https://www.lsoptsupport.com/@@site-logo/LS-Opt-Support-Logo480x80.png Constraints ConstraintsSelect the Constraints panel.From Response select displacement as the constraint..For Upper Bound enter -300.From Response select mass as the constraint..For Upper Bound enter 1.8.