Learning Forum

[christian.katsavos]

Hello, I'm trying to simulate a press moved by a cranckshaft mechanism with Rigid Dynamics approach. The simulation has reached the end with no error messages and the motion simulation "looks real".

I wanted to detemine the force reaction between the crankshaft and the connecting rod but I received the following message:

"The Result data for FSUM is not contained in the result file".

I evaluated the results, but no changes. I relaunched the simulation but, again, I couldn't obtain any result.

I politely ask for an help.

Thanks

[Erik Kostson]

Hi

I assume we talk about a force reaction probe?

Go to analysis settings, and Output control and set all to yes, then rerun (clear generated data first)
All the best

Erik

[christian.katsavos]

Hello Erik and thanks for the prompt response.
Of course we're talking about force reaction probe.
I don't understand which options should be set to "Yes" in Output Controls.
Thanks again Christian

[Erik Kostson]

Ok, there are none option for rigid dynamics - that is fine.

It is a bit confusing, you are showing rigid dynamics, and the error message says Solution -> Transient -> Force -> Reaction.
So FSUM is used in APDL solutions, say static or transient structural systems(flexible stress analysis not rigid dynamics), do not think this (FSUM) exists in rigid dynamics systems.

Can you show exactly what you are doing because it is very confusing - please show all systems (rigid dynamics and so on), and perhaps someone can understand better.

Erik

[christian.katsavos]

Hello Erik.
I dont know the reason why the path indicates "transient". Its a rigid dynamics simulation. I try to provide you with all the informations I have... If there still something I can do, feel free to ask. Thanks so much again for your kind collaboration.
Christian

[Erik Kostson]

HI

I am still puzzled I do not know why it asks for FSUM which is as I said apdl command and not rigid dynamics (which is another solver) - perhaps someone else knows.
Do you have any flexible bodies (you should not be able to), and can you show the details of the force reaction probe?
Since you have also joint rotation, use the joint reaction probe instead.
Thank you

Erik

[christian.katsavos]

Hello!
Of course no flexible bodies are available.
I tried Joint reaction Probe:
I obtained the very same error message. I also re started the simulation. It arrived to the end but the error message is always the same...

[Erik Kostson]

OK - not sure - perhaps someone else knows.

Erik

[christian.katsavos]

Dear Erik Is there something else I can do? May I send you the workbench file of this simulation (obviously, with the data cleared)?

Christian

[Erik Kostson]

HI

We are not allowed to open and you can not send us (ansys employees) any files - also I would not suggest publishing models on the forum.
(See forum guidelines).

Perhaps someone else will have some tips on how to resolve this.

Thank you

Erik

[ic1]

Hi Christian I just had a similar problem ÔÇô I cahnged the "Save MAPDL db" setting to Yes and the problem went away
I hope this helps

[christian.katsavos]

Hello IC1 thanks for your help, but I dont understand how to make available the options visible in your "Details of "Analysis Settings". Have a look at mine:

As you can see, for me Save MAPDL db option (as many others) is not visible... I've gone to "Options" and then to "Analysis Settings and Solution". I've selected "YES" in "Save MAPDL Database", but it is still not visible inside the Analysis Settings window".
Any tips to make all those options available?
Thanks so much Christian

[vishal_Astekar]

I am also facing similar issue. There are no options in output controls/ Analysis data management for rigid dynamics, but there are controls in Transient structural. Can you check if you have made any joints with a deformable behavior? this might be the cause for the error.

[Jan Koch]

Jear lather and Problem still persists (ANSYS 2022 R2) .... I think: yes ANSYS is not using APDL to solve Multibody Dynamics, but as one will get Forces by selecting surface geometry ANSYS ist using actually a APDL Command. Made a Multybody Dynamics simulation same errors comes, if I set up a Transient simulation I get the Forces... so for what  should I use Multibody Solver if I cannot get any Results?? Yes indeed the solver is much faster... but results are of importance.