Forces, pressures, and other loads are not required by the optimization model and therefore not
loaded. By default, fixed nodes are not loaded. Using the READ_BC = ALL
option in the command OPTIONS
, all fixed nodes
are loaded directly as node displacement restrictions for the optimization model. This option
is activated with the command:
OPTIONS
READ_BC = ALL
END_
Remarks
- For some solver interfaces it is also possible to directly enter a number
to specify which fixed nodes are loaded as optimization boundary conditions.
This proves especially useful when the optimization boundary conditions
are defined as an additional load case
in the FE model. The exact function of this load option depends on the
different interfaces (see Solver Specific Features).
- Fixed nodes can also be defined in the parameter file with the command
DVCON_SHAPE
. However, defining fixed nodes in the FE
model is more efficient.
- Only fixed nodes with a translation equal to zero in
the one, two, or three direction according to the coordinate systems of the nodes can be
loaded from the FE input in the optimization model. Constraint displacements not equal to
zero are not loaded.