NX NASTRAN Stiffness matrix

[ChrisHadfield]

Hi everyone,

I would like to use a CBUSH connector to joint two parts. I'm using an inter part connection which I would like to use a CBUSH and add the stiffness matrix of my inter part to it.

My question is, how can I get the stiffness matrix K of a part? I want to make a 3D analysis to determine my inter connection part stiffness matrix. I think it might be in the modal bulk data entry?

Anyone has a clue?

Thank you.

 

[rb1957]

not sure what you're doing ... you're joining two pieces with a CBUSH, yes? the CBUSH stiffness represents the fastener stiffness, right? but you wnat to add the stiffness of one of the pieces into the CBUSH ? maybe run the piece as a superelement (which'll condense the piece of structure toa stiffness matrix at the supports).

Quando Omni Flunkus Moritati

 

[ChrisHadfield]

That is right what I need to do, I never used super elements, I'll take a look ! thank you.