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Calculation of RBM of an External Superelement




I have to simulate (SOL103) a few models as external superelements, so I use the EXTSEOUT command in Case Control.

As these models are parts of a bigger system, they are totally unconstrained.

I would expect, that the AUTO-SUPORT function would detect the rigid body modes and calculate them properly, but it seems that with external superelements that's not the case.

I also tried to define SESUP or SUPORT entries, but it didn't work.


Is there any way to calculate the rigid body modes for an external superelement with Nastran?


Any help is appreciated!