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Prestressed modal analysis.

Prestressed modal analysis.

Prestressed modal analysis.

(OP)
Dear All,

I am trying to perform a prestresssed modal analysis on a beam using Ansys, but the results are the same as the modal analysis of the beam without the static force.

Idid static analysis with prestress ON ,EXIT solution , reopen solution, then modal analysis with prestress ON.

Please could anyone help me or show me the right way to do prestressed modal analysis .

Regards,
Abdelhamid5

RE: Prestressed modal analysis.

It can simply be that, due to the problem properties, the external forces you apply have no influence on the modal behavior of the structure.
Try to model a tensioned cable: in this case the modal behavior is highly influenced by the axial force.

andrea
 

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Dr. Andrea Mordini
Civil Engineer
Ph.D. in Structural Mechanics
http://www.andreamordini.com                          
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