Simulating Lifting?

[soccer8888]

I have a very large model with 4 'lugs' for lifting with chains. How is the best way to simulate this? Its not symmetric by any means, but I need to know how much it will flex when hanging, as well as finding the stress on the unit. Right now I have the holes through the lugs constrained in the vertical direction, with all other options free. As for the two horizontal contraints, I'm not sure what to do, as these will move when the unit flexes.


Here is a snapshot of what I have now. You can see the 4 lugs at the stress concentrations.


View attachment 1489

 

[Israr]

you should use shell structures and the famous three points constraint techniques.


Israr

 

[soccer8888]

the famous three points constraint techniques.


Israr

Tried to search but didn't come up with much. What technique(s)?

 

[Israr]

Its available in ptc documentation as well as on CADDIGEST tutorials.


If you still can't find it let me know and I will send you to you private email address.


Israr

 

[soccer8888]

Its available in ptc documentation as well as on CADDIGEST tutorials.


If you still can't find it let me know and I will send you to you private email address.


Israr

Well, I have been looking to no avail. Could you send it to ryanollinger@yahoo.com? Thanks!

 

[atlarson]

Select an element (vertex, edge,or small surface) at the left end of the structure and constrain it in theX and Z directions. Pick a similar element at the right end of the structure and constrain it in the X direction only. The selected elements could be two of your lifting lug holes, or not.


Andy