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## Simulation Mechanical and Multiphysics

Contributor
Posts: 21
Registered: ‎07-10-2008

# Boundary Conditions

278 Views, 2 Replies
02-07-2013 07:33 AM

Could You please any help me

I Have a ropeway car frame model (beam elements)

I am not sure respect How apply boundary condictions between roller and track rope.

Simplifying the disegn, I have not considered the roller contact, only bearing contact in the roller shaft.  What might be the traslations and rotation in the shaft of the rollers?

Considerering the normal forces between roller and track rope, How can I apply the boundary condictions?

Thanks

Juan Johnson

Valued Mentor
Posts: 489
Registered: ‎08-30-2012

# Re: Boundary Conditions

02-07-2013 07:11 PM in reply to: jjohnson

Hi Juan,

Here are my suggestions:

1. Create a local coordinate system aligned to the x and y axes shown in your free body diagram.
2. Assign points A, B, and F1 to the local coordinate system.
3. Set Ty at points A and B. The solution will give the reaction forces FA and FB.
4. Set Tx at point F1. The solution will give the force required in the rope F1.

If you are working a 2D model, you can restrain the other nodes in the "z" direction.

By the way, what are you trying to calculate with your model?

John Holtz, PE
Mechanical Engineer
Pittsburgh, PA

16 years experience with Simulation Mechanical