Roof Truss Displacement bug

[Anonymous]

Hi all,

I seem to have a bug on my model,  basically I have modelled a roof truss, and when I zoom out and  click on the displacements icon on the bottom right of the screen I get 56mm displacements. However if I zoom in I get 41248mm.

Please see the two images attached to further show the problem at hand.

Can anyone help ?

Kind regards

[Rafal.Gaweda]

Robot file please.

[Anonymous]

Hi Rafal,

I have attached the file,

[Rafal.Gaweda · Accepted solution]

First of all you have to correct model to get rid of instabilities
Due to releases definition in this model bars 901to903 905 907to909 966to972 can rotate around X (RX). Please correct model.

[Anonymous · Accepted solution]

By making the end memebers fixity N/a, it solves the problem, from the library struture it adopted tra_044_rel 1 which only restrains it RY.

Many thanks