Prediction — The error that grows as you refine
The base mesh has six nodes at the tip. What would be the total force if you executed
F,ALL,FY,-1000 with those six nodes selected?
6 nodes × (−1000 N/node) = −6000 N
F takes a nodal load. MAPDL does not interpret -1000 as the
resultant that you intend to distribute. That intent must be explicit in the script.
From a physical diagram to a test
| Physical decision | APDL Representation | Test |
|---|---|---|
| Fixed left end | fixed_nodes + D | 6 nodes and 18 zero displacements. |
| Total vertical force | tip_nodes + F | 6 nodes loaded and sum FY=-1000 N. |
| Different regions | Component intersection | n_overlap=0. |