For SurfType = CPLANE,nRefine refers to the number of points that define the surface. If SurfType
= CPLANE, and nRefine = 0, the points reside where the cutting plane section cuts through the element.
Increasing nRefine to 1 will subdivide each surface facet into 4 subfacets, thus increasing the number
of points at which the results can be interpolated.nRefine can vary between 0 and 3. Increasing
nRefine can have significant impact on memory and speed of surface operations.
/EFACET operations will add to this refinement, and values greater than 1 can amplify the effect of
nRefine. An /EFACET setting greater than 1 divides the elements into subelements, and nRefine
then refines the facets of the subelements.
For SurfType = SPHERE, and INFC,nRefine is the number of divisions along a 90° arc of the sphere
(default is 90, Min = 10, Max = 90).
Each time you create a surface, the following predefined geometric items are computed and stored.
- GCX, GCY, GCZ - global Cartesian coordinates at each point on the surface.
- NORMX, NORMY, NORMZ - components of the unit normal at each point on the surface.
- DA - contributory area of each point.
These items are used to perform mathematical operations with surface data (for instance, DA is required
to calculate surface integrals). Once you create a surface, these quantities (using the predefined labels)
are available for all subsequent math operations.
Issue SUPL,SurfName to display your defined surface. A maximum of 100 surfaces can exist within
one model, and all operations (mapping results, math operations, etc.) will be carried out on all selected
surfaces. You can use the SUSEL command to change the selected surface set.
See the SUCR command for more information of creating surfaces.
NoteWhen you define a cylinder (INFC), it is terminated at the geometric limits of your
model. Also, any facet lying outside of those limits is discarded.7.2.2.2. Mapping Results Data Onto a Surface
Once you define a surface, use the SUMAP command to map your data onto that surface. Nodal results
data in the active results coordinate system is interpolated onto the surface and operated on as a result
set. Your result sets can be made up of primary data (nodal DOF solution), derived data (stress, flux,
gradients, etc.), and other results values.
You define your mapped data in the SUMAP command by supplying a name for the result set, and
then specifying the type of data and the directional properties.
You can make the results coordinate system match the active coordinate system (used to define the
path) by issuing the following pair of commands:
*GET,ACTSYS,ACTIVE,,CSYS
RSYS,ACTSYSThe first command creates a user-defined parameter (ACTSYS) that holds the value defining the currently
active coordinate system. The second command sets the results coordinate system to the coordinate
system specified by ACTSYS.
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