Defining Frozen Areas

Sometimes it is required to maintain material in certain parts of the design area, such that they remain unchanged in the optimized model. Element groups describing these parts can be defined as frozen area.

This option is used to exclude the so-called frozen elements from being modified during the optimization, even though these elements are included in the design space. This is the case, for example, when the elements are used in order to fix the component and therefore should be preserved independently of their internal loads. The inclusion into the design space might be necessary, for example, to control the target volume (see constraints “absolute volume” or “relative volume”, Bd.1, Chapter 5.5.1).

See Also
In Other Guides
DVCON_SIZING
  1. Choose Command | DVCON_SIZING in Tosca Structure.pre screen.
  2. Apply an ID_NAME and select the element group that is to be frozen. If the element group is not already defined, it is necessary to define it in advance using the GROUP_DEF command.
  3. Choose Type = Frozen.