Extreme displacement result

[nicholas.fiorillo]

Hello,

Sometimes when i'm modeling light steel frame structures, i got some weird displacement results to transversal direction of the loads. I try fixing all the connections, creating new supports and bracings but the problem keeps happennig.

[Romanich]

Hi @nicholas.fiorillo ,

It is hard to say without having the model

[nicholas.fiorillo]

I can't attach the file, it says: ''Please enter a value for this field''.

[Stephane.kapetanovic]

hi @nicholas.fiorillo 

zip your project without results and move your file to this area by replying

Best regards

[Stephane.kapetanovic · Accepted solution]

hi @nicholas.fiorillo 

there are some imperfections in the model. 

to see them, increase the number of decimals of length units.

The differences are not huge but they are greater than the mesh tolerances.

Some bars are not perfectly aligned with the main axes.

Best regards

[Stephane.kapetanovic · Accepted solution]

hi @nicholas.fiorillo 

You have instabilities, try to use releases rather than declaring the bars as truss elements.

Best regards

[nicholas.fiorillo]

it worked out, thank you guys for the support.