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Cardinal Point

Cardinal Point

Cardinal Point

(OP)
When you choose a cardinal point that is not at the centroid of your section does SAP still apply the mass of the section to the centroid or at the selected cardinal point?  

 

RE: Cardinal Point

structural

I think you should try it yourself.

Model a simple beam of known mass. Run to find frequency and mode shape, you can also display modal forces. then cardinal it, repeat. The difference if any should clear your doubts.

I bet the mass is shifted.

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