Operator for Reaction Moments

[GitHubUser120282]

Before submitting the issue

• I have checked for Compatibility issues
• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

Hi,
Is an operator for reaction moments (as for reaction force) available?
https://dpf.docs.pyansys.com/version/0.11/api/ansys.dpf.core.operators.result.reaction_force.html

Steps To Reproduce

Nothing

Which Operating System causes the issue?

Windows

Which DPF/Ansys version are you using?

Ansys 2024 R1

Which Python version causes the issue?

3.12

Installed packages

....

[js4561207]

I also can't find any way to extract the reaction force in pydpf, but I can use pymapdl combined with APDL FSUM command and *GET command to extract the reaction force. Hopefully this will help you !

[PProfizi]

Hi @js4561207,
For the reaction force moment, have you tried result.raw_reaction_force?
Also, to extract the reaction force, you should be able to use result.reaction_force, does it not work?
Can you try to load your results in a Model and print the available results as shown in this example.

[js4561207]

Hi @PProfizi, thanks for your reply.

Results

This is pydpf results and I need to scope to nodes that are constrained.

If i try to scope to all nodes, the results are not correct. (Ie. the node 118341 don't have reaction forces in the xlsx file)
reaction.xlsx

This is pymapdl and apdl results, which extracts all reaction forces at all constrained nodes.

The results of these three are slightly different because of graphics control in MAPDL.
(Full graphics or Power graphics)

System and environments

Windows
python3.9.16
pyansys-dpf-core 0.11.0
Ansys 2023R1

[GitHubUser120282]

Hi,
my initial question is related to nodes with rotational DOFs (e.g. for shell elements) that are constrained and then to get the reaction moments. Using operator reaction_force will give the forces only ...

[js4561207]

@GitHubUser120282
Using raw_reaction_forces.

BUT the results is still different with APDL's output

[PProfizi]

Hi @js4561207,
sorry for the late reply but despite our best efforts we could not reproduce the behavior you communicated above.
Would you happen to have a small sample result file for us to reproduce?