I recently tried to analyze an RVE model using dynamic explicit analysis steps. I used the EasyPBC plugin to add periodic boundary conditions to RVE and generated about 25,000 constraint equations in the model. However, after submitting the job, the Packager phase was never completed.

I noticed that an expert named Alex REICHERT answered a similar question by saying that

" This might be BR10000147911: A particular Abaqus/Explicit analysis with a largenumber of *EQUATION definitions take exceptionally long time (in hours) before it aborts in the Packager phase due to memory allocation issues. To work around this(unresolved) issue, try to define "nested" equations to cut down the number of nodes participating in a single constraint."

However, my model cannot reduce the number of equation, because it is related to the accuracy of the stress distribution of RVE, and the accuracy of the model mesh has reached the limit that I can accept. How can I define "nested" equations to cut down the number of nodes participating in a single constraint？ And is there any other way to solve my difficulties?

Abaqus ​​​​​​​