Modeling Container - modeling issues

[AndrewRV]

To whom it may concern,

I'm currently trying to model some shipping containers of various sizes and I'm struggling to model the walls correctly.

I've tried to model them as diaphragms but I get the attached jpeg warning; 'Incorrect panel calculation model'

I'm not entirely sure which panel calculation model to use to effectively model the walls as structural elements.

If anybody can help it would be greatly appreciated.

[Rafacascudo · Accepted solution]

On calculation model dialog , flexible diaphragm is only for panels in XY plane. If you really want to model a vertical diaphragm , you would have to do it yourself using rigid links .

But anyway , for this model it would be impossible because of the common edges nodes that would become slave node for both panels(vertical and horizontal) , which cannot be done!!

Instead ,change the model to "shell" calculation model , and there will not be problems.

Also

1- What are those bars on the containers base?

2- Not a specialist on containers , but wouldn´t be more like this below ,instead of 3mm constant thickness?

3- changed the mesh size to 500mm to get a much better mesh.

Model attached

[AndrewRV]

Thanks for your response.

Just a quick question. Obviously when using a cladding you can apply an area load and it be spread to the supporting beams. Do you know if this is possible using the shells? Or could we apply a cladding in the same plane as the shell and it apply the load as necessary? 

[Rafacascudo]

No , never put a cladding over a panel !!

Yes , you can set the load distribution of a shell panel to be just like a cladding (triangular and trapezoidal method) , but the colateral damage is that you will not have trustable results (internal forces, displacements) for this same panel

Read Artur´s answer on this thread here.

https://forums.autodesk.com/t5/robot-structural-analysis-forum/i-don-t-see-region-load/m-p/7120416#M...

[AndrewRV]

Thanks for all your help Rafael.