Mechanical APDL Basic Analysis Guide - Ansys

Chapter 7:The General Postprocessor (POST1)
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,ACTSYS
The 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.
Results mapped on to a surface do not account for discontinuities (e.g., material discontinuities) but are
based on the currently selected set of elements. Selecting the proper set of elements is critical to valid surface
operations, and improper selection will either result in failed mapping, or produce invalid results.
To clear result sets from the selected surfaces (except GCX, GCY, GCZ, NORMX, NORMY, NORMZ, DA), issue
SUMAP,RSetname,CLEAR. To form additional labeled result sets by operating on existing surface result
sets, use the SUEVAL, SUVECT or SUCALC commands.
7.2.2.3. Reviewing Surface Results
You can use the SUPL command to visually display your surface results, or use the SUPR command to get
a tabular listing.
SUPL of a single result set item is displayed as a contour plot on the selected surfaces. You can also obtain
a vector plot (such as for fluid velocity vector) by using a special result set naming convention. If SetName
is a "vector prefix" (i.e., if SetNameX, SetNameY, and SetNameZ exist), ANSYS will plot these vectors on the
surface as arrows.
Example for vector plot:
SUCREATE,SURFACE1,CPLANE ! create a surface called "SURFACE1"
SUMAP,VELX,V,X ! map x,y,z velocities with VEL as prefix
SUMAP,VELY,V,Y
SUMAP,VELZ,V,Z
SUPLOT,SURFACE1,VEL ! this will result in a vector plot of velocities
Display of facet outlines on the surface plots is controlled by /EDGE command similar to other postprocessing
plots.
7.2.2.4. Performing Operations on Mapped Surface Result Sets
Three commands are available for mathematical operations among surface result sets:
• The SUCALC command lets you add, multiply, divide, exponentiate and perform trigonometric operations
on all selected surfaces.
• The SUVECT command calculates the cross or dot product of two result vectors on all selected surfaces.
• The SUEVAL command calculates surface integral, area weighted average, or sum of a result set on all
selected surfaces. The result of this operation is an APDL scalar parameter.
7.2.2.5. Archiving and Retrieving Surface Data to a File
You can store your surface data in a file, so that when you leave POST1, it can be retrieved later. You use
the SUSAVE command to store your data. Once you have saved the information for your surface, you use
the SURESU command to retrieve it.
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