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Static condensation using CBN

Hello,

I was working in a normal modes analysis of an assembly model, Only one attached component it is of interest so I would like to use the direct matrix input for the environment of the component, I have create the ASET constraints in the connection nodes of the environment, delete the retained elements (elements of the component of interest) and add the CMSMET (using the CBN method) card, but when I run the analysis the warning 3865 appear:

** WARNING # 3865
The generated SPOINT IDs for DMIG matrix has overlapped with existing
GRID IDs of the model.
starting SPOINT ID for DMIG = 169938
ending SPOINT ID for DMIG = 169938
the overlapped GRID ID = 169938

I hope you can help me to solve this problem, thanks in advance.

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Altair Forum User

Hi,

You have not done anything wrong, this is just a warning and still no error message.
In effect, this means that the SPoint ID is the same as an existing Grid ID.

Altair Forum User

Hi,

I was facing the same error when using CBN method for SIMPACK. What node should be selected for SPID?

image.png.dfd40e4fb67b50eb317356f6120af391.png

Altair Forum User

Hi @Nabeel_tk

Can you provide any big number and check if that helps (say 100000 and make sure this doesn't coincide with any node ID)