The element group for a certain restriction should be a subset of the
design element group. If this is not the case, SIMULIA Tosca Structure
will stop the optimization.
The
DVCON_SIZINGID_NAME must be referenced in the
OPTIMIZE
command in order to activate the restriction. In Tosca Structure.gui,
the DVCON_SIZING entry must be activated in the OPTIMIZE
mask.
OPTIMIZE
...
DVCON = name_of_dvcon_entry
...
END_
Each geometrical restriction reduces the possibilities of the solution.
Thus, it is necessary to add only the restrictions needed for solving
the problem. It is still possible to find a solution if too many restrictions
are defined, but the result will most probably be suboptimal compared
to the optimal design. Therefore, the first step for the user is to perform
an optimization without restrictions to obtain knowledge about the restrictions
needed for the specific problem.
It is impossible to combine all manufacturing constraints at random.
The user must be careful when combining conflicting restrictions.