26 -128.20 31.023 .00000E+00 68.191 .00000E+00 .00000E+00
27 41.558 51.533 .00000E+00 66.997 .00000E+00 .00000E+00
28 -80.975 9.1077 .00000E+00 63.877 .00000E+00 .00000E+00
MINIMUM VALUES
NODE 11 2 1 18 1 1
VALUE -520.81 -294.83 .00000E+00 -68.279 .00000E+00 .00000E+00
MAXIMUM VALUES
NODE 5 3 1 9 1 1
VALUE 468.15 73.743 .00000E+00 68.563 .00000E+00 .00000E+007.2.4.2. Listing Reaction Loads and Applied Loads
You have several options in POST1 for listing reaction loads and applied loads. The PRRSOL command
(Main Menu> General Postproc> List Results> Reaction Solu) lists reactions at constrained nodes in
the selected set.
In all dynamics analyses except for spectrum analyses, the FORCE command used with PRRFOR (not
menu accessible) dictates which component of the reaction data is listed: total (default), static, damping,
or inertia. In spectrum analyses, the force type is input on the combination command.
PRNLD (Main Menu> General Postproc> List Results> Nodal Loads) lists the summed element nodal
loads for the selected nodes, except for any zero values.
The output of summed nodal forces (PRRFOR,NFORCE,FSUM commands, etc.) containing a node that
belongs to a constraint equation or part of an MPC bonded contact region (or pilot node) does not in-
clude the force redistribution due to the constraints. Use PRRSOL, as it contains the redistribution.
Listing reaction loads and applied loads is a good way to check equilibrium. It is always good practice
to check a model's equilibrium after solution.That is, the sum of the applied loads in a given direction
should equal the sum of the reactions in that direction. (If the sum of the reaction loads is not what
you expect, check your loading to see if it was applied properly.)
The presence of coupling or constraint equations can induce either an actual or apparent loss of equi-
librium. Actual loss of load balance can occur for poorly specified couplings or constraint equations (a
usually undesirable effect). Coupled sets created by CPINTF and constraint equations created by CEINTF
or CERIG will in nearly all cases maintain actual equilibrium. Other cases where you may see an apparent
loss of equilibrium are: (a) 4-node shell elements where all 4 nodes do no lie in an exact flat plane, (b)
elements with an elastic foundation specified, and (c) unconverged nonlinear solutions. See the Mech-
anical APDL Theory Reference.
Another useful command is FSUM.FSUM calculates and lists the force and moment summation for the
selected set of nodes.
Command(s):FSUM
GUI: Main Menu> General Postproc> Nodal Calcs> Total Force Sum
Sample FSUM Output
*** NOTE ***
Summations based on final geometry and will not agree with solution
reactions.
***** SUMMATION OF TOTAL FORCES AND MOMENTS IN GLOBAL COORDINATES *****
FX = .1147202
FY = .7857315
FZ = .0000000E+00
MX = .0000000E+00Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationThe General Postprocessor (POST1)