Mechanical APDL Basic Analysis Guide - Ansys

19 41.811 51.777 .00000E+00 -66.760 .00000E+00 .00000E+00
20 -81.004 9.3348 .00000E+00 -63.803 .00000E+00 .00000E+00
21 117.64 -5.8500 .00000E+00 -56.351 .00000E+00 .00000E+00
22 -128.21 30.986 .00000E+00 -68.019 .00000E+00 .00000E+00
23 154.69 -73.136 .00000E+00 .71142E-01 .00000E+00 .00000E+00
24 -127.64 -185.11 .00000E+00 .79422E-01 .00000E+00 .00000E+00
25 117.22 -5.7904 .00000E+00 56.517 .00000E+00 .00000E+00
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+00
7.2.4.2. 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. The FORCE command dictates which component of the reaction data is listed: total (default), static,
damping, or inertia. PRNLD (Main Menu> General Postproc> List Results> Nodal Loads) lists the summed
element nodal loads for the selected nodes, except for any zero values.
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 equilibrium.
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. Also, the sum of nodal forces for a DOF belonging to a constraint
equation does not include the force passing through that equation, which affects both the individual
nodal force and the nodal force totals. 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 Theory Reference for the Mechanical
APDL and Mechanical Applications.
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+00
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Sample FSUM Output
151