simplely supported beam binding

[Merka73]

Good evening to all
I am trying to learn pro/m and for this, I am trying to analyze a supported simple beam but in 3d (I know that it is very convenient to do it as a single-dimensional problem but qs is only 1 example).
I would like to make 1 comparison with the theory of construction sciences, my results and those of qs tutorials http://www.mece.ualberta.ca/tutorials/ansys/it/distributed/distributed.html.
the problem is how to make the correct binding of the ends of the beam... or I get a non-symmetric deformed (from the theory, as well as the reference tutorial, the deformed is perfectly symmetrical and the max of the movements and of the bending moment you have it at the center of the beam length. ) or the program gives me lability error and therefore the analysis ends with 1 fatal error.
every suggestion is welcome

thanks in advance
ps: all the data of the problem are taken from the tutorial of the University of Tree.
I send you + late also pictures of my desktop.

 

[AMinati]

you must bind one of the two ends even along the axis of the beam and in the normal one both to the axis of the beam and to the direction of the ends constraints!

if the model you have created is solid type fixed the two end edges where you need to support the beam with smooth constraints, one of these two edges you must also bind it along the other two directions to eliminate the lability of the model.

Of course the results in the areas close to these two corners will give you high values for the concentration of efforts, apart from the solutions that give the science of buildings are valid in the areas sufficiently far away from the supports.

aminati

 

[Merka73]

thanks for the useful suggestions.
for completeness place the results I got with the wf4.

Say hi. .

 

[cacciatorino]

the theory of construction science neglects the movements of the second order, that is, where you put the cart, the shift along the axis of the beam is considered null by the theory, but instead it is not in practice. so while the beam is inflected, its average point moves towards the hinge support without a trolley, while the force will remain applied at the point where the average point was originally. Then the structure is no longer symmetrical.
I hope I made myself understand!

Bye.