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How to model node point shared by more than 1 model?
Another words, how to transfer Forces and Moments at 1 node point that is shared between models?
Example: Node point C03 is shred between Model #1 and Model #2
Instead of modeling to a run Node point (ex. C03) shared by both models, suggest to model pipping to an anchor location shared in both models, and provide both model results to the structural people to correctly design the anchor.
Recommend to not use a typical piping run point, flange junction, branch connection, valve, etc.. as shared point between 2 models. One cannot just take the forces and moments results from a model, insert them into the next model, and assume that analysis results would be correct.
The most important aspect many engineers forget about is the stiffness of the adjoining piping systems. In some rare cases it maybe simple to consider adjoining model stiffness, but for most, correctly representing model stiffness in another model file is very complicated. Furthermore, dynamic analysis cannot be performed on models share a node point (non-anchor location). Remember from your AutoPIPE advance training, modal analysis results must exist before performing a dynamic analysis. A modal analysis calculates the natural frequencies and mode shapes. These calculation considers the total mass and Mass Degrees of Freedom for every node point in the connected piping arrangement. As of July 2020, Modal analysis cannot be analyzed across multiple model files.
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