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The eigenfrequency of a deformed structure considering the prestress
Posted 18.03.2018, 03:50 GMT-4 Structural & Acoustics, Acoustics & Vibrations, Structural Mechanics 2 Replies
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Hi, I want to solve the eigenfrequency of the deformed structure. Taking the superelastic structure for example, I solve the static characteristic considering non-linearity in the first step, obtain the structural deformation and stress. In the second step, I need to solve the eigenfrequency of superelastic structure considering the deformation and stress in the first step. How to introduce deformation and stress in the first step into the second step?
Thanks in advance.
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Hi Ruiq,
You use the Prestressed Analysis, Eigenfrequency study. It contains of a stationary study step, and a subsequent eigenfrequncy study step. The latter uses the preload results as linearization point.
You will find a discussion about how to display the eigenmodes on the deformed structure in this thread:
https://www.comsol.com/forum/thread/171891/eigenfrequency-analysis-mode-shape
Regards,
Henrik
Henrik Sönnerlind
COMSOL
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Hello Henrik,
I have successfully solved this problem according to your method. Thank you very much.
Kind regards,
Ruiq