- Map the desired quantity on to the path using the PDEF command (Main Menu> General Postproc>
Path Operations> Map onto Path) - Use the PLPATH and PLPAGM commands (Main Menu> General Postproc> Path Operations>
Plot Path Items) to display the results.
More details on this appear later in Mapping Results onto a Path (p. 170).
7.2.1.5. Reaction Force Displays
These are similar to boundary condition displays and are activated using the labels RFOR or RMOM on
the /PBC command. Any subsequent display (produced by commands such as NPLOT,EPLOT, or
PLDISP) will include reaction force symbols at points where DOF constraints were specified. The sum
of nodal forces for a DOF belonging to a constraint equation does not include the force passing through
that equation. See the Mechanical APDL Theory Reference.
Like reactions, you can also display nodal forces using labels NFOR or NMOM on the /PBC command
(Utility Menu> PlotCtrls> Symbols). These are forces exerted by an element on its node. The sum of
these forces at each node is usually zero except at constrained nodes or at nodes where loads were
applied.
By default, the force (or moment) values that are printed and plotted represent the total forces (sum
of the static, damping, and inertial components). The FORCE command (Main Menu> General Postproc>
Options for Outp) allows you to separat e the total force into individual components in all dynamics
analyses except for spectrum analyses. In this case, the force type is directly input on the combination
command.
7.2.1.6. Particle Flow and Charged Particle Traces
A particle flow trace is a special form of graphics display that shows how a particle travels in a flowing
fluid. A charged particle trace is a graphics display that shows how a charged particle travels in an
electric or magnetic field. See Creating Geometric Results Displays (p. 269) for more information on
graphic displays and see Animation (p. 287) for information on particle trace animation. See the Mech-
anical APDL Theory Reference for simplifying assumptions on electromagnetic particle tracing.
A particle flow or charged particle trace requires two functions:
- The TRPOIN command (Main Menu> General Postproc> Plot Results> Flow Trace> Defi Trace
Pt). Either defines a point on the path trajectory (starting point, ending point, or anywhere in
between). - The PLTRAC command (Main Menu> General Postproc> Plot Results> Flow Trace> Plot Flow
Tra). Either produces the flow trace on an element display. Up to 50 points can be defined and
plotted simultaneously.
A sample PLTRAC plot is shown below.
Figure 7.8: A Sample Particle Flow Trace
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationReviewing Results in POST1