I'd better say how can I transfer stresses from static general to linear frequency? I can transfer stress by restarting and transferring but it does not have any effect on the natural frequencies.
Abhimanyu Kumar
did you turn on nlgeom? if not, frequency (linear perturbation) will always assume stressfree condition
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Mohammadjavad Einafshar
Abhimanyu Kumar Yes, I did,
The user manual indicated too but I didn't see any difference.
If NLGEOM is used, initial stress and preload stiffness effects will be included in the frequency extraction step
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Abhimanyu Kumar
the stress stiffening effect is more visible for high stresses. think of a guitar string, the frequency changes slowly at low stress, but at higher it's much more rapid
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