Learning Forum

[anolivei]

Hi, I have been trying to simulate the stresses and deformations due to centrifugal forces of yoke parts on the inner side of a rotor. The Rotor is cylinder-shaped with a hollow center, and the yoke parts are located on the inside of the rotor. The Rotor is stabilized by an Active Magnetic Bearing and therefore does not have a fixed support on the inside face. I have started a structural analysis by introducing a rotational velocity to the rotor, but I was wondering how I should define the supports. 

Additionally, as the rotor spins and it expands, how should I define the contact faces between the yoke segments?

Are there any similar examples out there? 

Any help is greatly appreciated.

Thanks,

Andrey

[peteroznewman]

Use a Bearing Support. That allows you to define the spring rate of the connection.

I can't tell what the yoke part looks like from the image above.

[anolivei]

The yokes are embedded into the rotor and they would look something like this:

The yoke is not a continuous part, instead, it is segmented as shown above. I will run the simulation once again with the bearings, but I was wondering if the contact points between the yoke segments should be bounded or rough. I have them as bounded now, and the interface between the yoke and the rotor are rough in order to allow for expansion of the rotor and the yoke. 

[peteroznewman]

If the yoke is segmented, what holds it together?  Bonded contact can hold parts together to simulate an adhesive bond or weld.  Rough contact would allow the parts to separate if forces pull the pieces apart.  Bonded contact will not allow that.