I am trying to solve a basic model, whereby two (or more) identical hollow shell cylinders (columns) of 2m radius and 30m height with a mass on the top are placed on a solid cylinder with dimensions of 50m radius and 20m depth. I am running an eigenfrequency analysis and would like to see how both cylinders vibrate and how they interact if I put more force on one column than the other.
I have set a prescribed displacement of the contact edge on the base of both cylinders in the solid domain equal to the displacement values (u,v and w) in the shell domain.
Instead of seeing just one frequency on running the eigenfrequency analysis, I see two identical frequencies for each column. This doesn't show how and if the columns are interacting with each other at that frequency. Ideal I'd just like to see one frequency with both columns bending (if thats the case) and the ground cylinder reacting accordingly.
Can anyone help? I hope that makes sense.
I have set a prescribed displacement of the contact edge on the base of both cylinders in the solid domain equal to the displacement values (u,v and w) in the shell domain.
Instead of seeing just one frequency on running the eigenfrequency analysis, I see two identical frequencies for each column. This doesn't show how and if the columns are interacting with each other at that frequency. Ideal I'd just like to see one frequency with both columns bending (if thats the case) and the ground cylinder reacting accordingly.
Can anyone help? I hope that makes sense.