Discussion Groups

Robot Structural Analysis

Reply
Active Contributor
Burgon87
Posts: 46
Registered: ‎03-21-2012

Node fixings

579 Views, 3 Replies
06-11-2012 04:22 AM

Are nodes fixed as a default?

 

I have pinned members (simply supported) but do I need to fix the nodes at either end to create a simply supported member? How are node restrained as a defaults? As I am getting A LOT of instabilities in the nodes?

 

Many Thanks

Please use plain text.
Product Support
Rafal.Gaweda
Posts: 5,604
Registered: ‎04-26-2010

Re: Node fixings

06-11-2012 04:27 AM in reply to: Burgon87

Are nodes fixed as a default?

 

Yes, except truss structure types.

 

 

I have pinned members (simply supported) but do I need to fix the nodes at either end to create a simply supported member?

 

Examples:

 

Pinned support + member without release

 

Fixed support + member with release

 



Rafal Gaweda
Please use plain text.
Active Contributor
Burgon87
Posts: 46
Registered: ‎03-21-2012

Re: Node fixings

06-11-2012 04:34 AM in reply to: Rafal.Gaweda

For a simply supported memeber should I release Rx, Ry and Rz? Fixing Ux, Uy and Uz?

Please use plain text.
Product Support
Artur.Kosakowski
Posts: 5,115
Registered: ‎12-17-2010

Re: Node fixings

06-11-2012 04:51 AM in reply to: Burgon87

I would recommend releasing only RZ and RZ at both bar ends in situations where you need to apply releases to many bars of the model. Then you can check MX values for the bars you consider as simple supported ones and define RX release at one side when necessary. You should not release RX at both ends.

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
Please use plain text.