Define Symmetry Conditions in Tosca Structure.gui
- Choose Command > LINK_TOPO.
- In the LINK_TOPO menu, define the type of symmetry, the coordinate system and, if necessary, the rotation angle (in case of rotation symmetry) or the translation distance (in case of cyclic symmetry).
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The symmetry definition can also be extended to frozen areas
by selecting the corresponding checkbox.
The frozen elements of one area are also considered as frozen for the linked areas, if the Frozen checkbox is checked.
- Select Command > DVCON_TOPO.
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In the DVCON_TOPO dialog, apply the defined LINK_TOPO to an element group as shown in the following figure:
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The corresponding parameter file looks like:
LINK_TOPO ID_NAME = <Name of LINK_TOPO object> CS = <Name of the reference coordinate system> TYPE = <Type of symmetry>, <axis> TRANSLATION = <Translation for cyclic symmetry> ANGLE = <Segment angle for rotation symmetry> END_ DVCON_TOPO ID_NAME = <Name of DVCON_TOPO object> EL_GROUP = <Element group to be restricted> CHECK_TYPE = LINK_TOPO CHECK_LINK = <Name of LINK_TOPO definition> END_
More than one symmetry condition can be defined for an element group. Geometrically, different combinations must be feasible.