those lines, all elements belonging to these areas, lines, and keypoints, and all nodes belonging to these
elements, by simply issuing one command:ALLSEL,BELOW,AREA
To select a subset of degree of freedom and force labels, use one of the following:
Command(s):DOFSEL
GUI: Main Menu> Preprocessor> Loads> Define Loads> Operate> Scale FE Loads> Constraints
Main Menu> Preprocessor> Loads> Define Loads> Operate> Scale FE Loads> Forces
Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add> Constraints
Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add> Forces
Main Menu> Solution> Define Loads> Operate> Scale FE Loads> Constraints
Main Menu> Solution> Define Loads> Operate> Scale FE Loads> Forces
Main Menu> Solution> Define Loads> Settings> Replace vs Add> Constraints
Main Menu> Solution> Define Loads> Settings> Replace vs Add> Forces
By selecting a subset of these labels, you can simply use ALL in the Label field of some commands to
refer to the entire subset. For instance, the command DOFSEL,S,UX,UZ followed by the command
D,ALL,ALL would put UX and UZ constraints on all selected nodes.DOFSEL does not affect the solution
degrees of freedom.
9.2. Selecting for Meaningful Postprocessing
Selecting can also help you during postprocessing. For instance, in POST1, you can select just a portion
of your model to display or list the results. You should always use selecting to obtain meaningful results
in POST1 when the model has discontinuities.
When you request contour displays with the PLNSOL command (Utility Menu> Plot> Results> Contour
Plot> Nodal Solution), the ANSYS program produces smooth, continuous contours by averaging the
data at nodes. This averaging is acceptable as long as the model contains no discontinuities, such as:
- Two different materials modeled adjacent to each other or a model with different thicknesses. (See
Figure 9.1: Shell Model with Different Thicknesses (p. 227)) - Adjacent layered shells having a different number of layers. (See Figure 9.2: Layered Shell (SHELL281)
with Nodes Located at Midplane (p. 228) and Figure 9.3: Layered Shell (SHELL281) with Nodes Located
at Bottom Surface (p. 228))
When such discontinuities are present, be careful to process each side of the discontinuity separately
by using selecting.
Figure 9.1: Shell Model with Different Thicknesses
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationSelecting for Meaningful Postprocessing