In-Plane and Out-Plane SIFs After FEA Translation - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

For Home > FEA Tools > FEA Translation , the translator might change in-plane and out-plane SIFs in the translated CAESAR II model based on the orientation of elements forming the tee.

In order to properly apply FEA-calculated flexibilities, the translator creates a beam model and breaks the tee component into a series of straight pipes and rigids with corresponding connections (restraints with CNodes).The definition of intersections, as defined by the CAESAR II local coordinates, is lost. The translator must determine the correct way of implementing the SIFs of the branch connection of the CAESAR II model from the FEA Tools beam model. At the run and branch C-Node connections, the in-plane orientation is indeterminate because only two collinear beam elements exist.

The translator sets the intersection type to blank to complete import into CAESAR II. The elements created with a C-node at the branch connection are no longer associated with a 3D fitting. Because the two elements are now collinear, the software uses the default straight element orientation for in-plane and out-plane SIFs. The default in-plane and out-plane orientations might not match the actual 3D fitting’s orientation. The FEA translation correctly places the in-plane and out-plane SIFs based on the original tee orientation.