| CLIENT / Applicable for |
Controller (SHAPE_CONTROLLER) |
Sensitivity (SHAPE_SENSITIVITY) |
| SURF_CYCLIC_SYM |
OK |
- |
-
This link condition couples nodes in a not necessary symmetric mesh
that reoccur in a cyclic manner around a rotational axis.
-
To be able to build up the coupling, a symmetry axis and an angle
must be specified. The following six parameters are necessary for the
definition of the link condition:
CLIENT = SURF_CYCLIC_SYM
CLIENT_DIR = <X_1>, <X_2>, <X_3>
CS = name_of_coord_system
TOL = tolerance_value
ANGLE = angle_in_degree
CYCLIC_SYM_START = <X_1>, <X_2>, <X_3>
-
The CLIENT_DIR parameter defines the rotational axis and is specified in
coordinates of the coordinate system CS. Like for the SURF_PLANE_SYM
link condition the TOL parameter is used in intersection tests as absolute
tolerance. The ANGLE divides the area around the axis (CLIENT_DIR) in
pieces of equal size that shall be made symmetric. Thus, the angle must be
a divisor of 360°. The CYCLIC_SYM_START point defines the starting point
for the partitioning (see the following figure). Its coordinates are given with
reference to the global cartesian coordinate system. It must not lie on the
rotational axis.
Like for the SURF_PLANE_SYM link condition a master strategy might
be selected:
MASTER = MAX | MIN
The strategy determines if the maximum or the minimum displacement
of the linked nodes should be used to return a symmetric result. The link is
determined in a similar way as for plane symmetry: for each node, reference
points on the surface with respect to the rotational cyclic symmetry and their
interpolated displacements are calculated. The master criterion then influences which optimization displacement will be applied.
