fem analysis and gravity

[Framby1983]

Hello.
I would like an opinion from those who like you know more. I have the problem briefly.

I have to check if a container carrying a certain load (for accuracy n.6 engines of 270kg/cad) can be stacked statically for a maximum of three. (as in the photo attached).
had to insert gravity I thought well to apply it to the center of the configuration; by turning the calculation the results are not convincing at all (see photo), as if only the central container took all the contribution of gravity.

I ask you, what am I wrong? Should I apply gravity to a surface and not to the center of gravity? if what?

ps: I assumed that I must necessarily apply gravity otherwise the software does not recognize the weight that the two containers discharge on the pillars of the container supported on the ground. Right?

 

[mula]

Hi. .
is the figure a set of three elements stacked?
I think gravity should apply it to all three elements. because being three separate elements as you set you have considered only the central one and those above and below are without gravity.

 

[Framby1983]

Hi.
the structure consists of 3 axioms bound on the pillars.
gravity force is applied to the center of gravity and not to the central body!! (you see it so that the center of gravity is at that altitude).
what does not return to me is that by applying only gravity I have a maximum voltage of 346 mpa; which is not possible (steel should yield already without being loaded).

gravity I need to transfer the weight of the two structures above to the 4 pillars of the lower container.

as soon as I can place the attempts I made

 

[il teo]

Good morning.
Why not use the "gravity" command in the management of forces?
the illustrated approach is theoretically incorrect as each structure is subject to gravity force.
different speech for an indeformable object that must interact with an external structure.
greetings

 

[Tarkus]

Hi. .
is the figure a set of three elements stacked?
I think gravity should apply it to all three elements. because being three separate elements as you set you have considered only the central one and those above and below are without gravity.

quoto,
I see her like this.
must be verified that each basket separately reggas the assigned load including gravity.
and then check if the legs of the basket lower than the three stacks hold the load, at that point no matter if you see an exaggerated curve in the central basket