Parallel Execution with Kinematic Constraints

[eoo0001]

Hello,

I'm looking for help on running an explicit simulation in parallel. I have a simple tension test of a rectangular bar; one end of the bar is fixed, the other is being displaced. I've got the displaced surface constrained to a reference node through a kinematic coupling constraint (surface-to-node coupling) and I'm trying to execute the simulation in parallel with 4 CPUs. When I try to run the simulation, though, I get an error stating that the "requested number of domains cannot be created due to restrictions in domain decomposition", and the note that "all nodes involved in a kinematic constraint must be in the same domain and must not be shared with other domains.

My question is - how do I specify the domain in this case to ensure that all nodes contained within this kinematic constraint are included in the same domain? I've found the command *DOMAIN DECOMPOSITION (link:

http://bobcat.nus.edu.sg:2080/English/SIMACAEEXCRefMap/simaexc-c-parallelexecution.htm),

but it looks like the definitions are limited to element sets, which wouldn't allow me to include the reference node used in the constraint. I would appreciate any suggestions that anyone could provide on how to solve this issue!

Thanks,
Eoghan

 

[FEA way]

Try with different number of CPUs, it should work.

 

[Mustaine3]

Or check if a rigid body constraint does the same without the parallelization issue.