Reactions on the supports 2

[davidrdguez]

Hi all!

I have an aluminium plate with some non homogeneity weight on the top.
Under it, there are 4 legs sustaining it.

I can get stresses and deformations easily (imprinting surfaces, applying forces, fixations...).

But what i would like to know is the force in the reactions. I have a limit of Kgs i can't exceed per leg.

This is a problem of classical mechanics, I wonder if it can be solved with Ansys workbench

Thank you

Regards,

 

[flash3780]

CAD programs will compute the center of mass of a complex geometry, which would allow you to compute force reactions. Gotta love computers because it can be a laborious task otherwise. If the problem is statically indeterminant, Ansys Workbench could calculate reaction loads for you.

 

[davidrdguez]

Sorry I don't understand the answer.

I do love computers.

I just learnt how to solve this problem with Catia FEM. There is a tool which you use in the supports and gives you the 3 components of forces and momentums.

What I want to do it's the same with Ansys workbench

cheers,
david

 

[MKEengineer]

The analysis can be modeled in workbench. Setup separate fixed boundary conditions for each leg. In results area insert separate probes for the reaction forces.

 

[flash3780]

This problem can be solved in Ansys Workbench; outputting force reactions on boundary conditions is not difficult (Solution>Right Click>Insert Force Reaction, I think). I was just pointing out that, if the problem can be solved statically it's fairly straightforward to calculate force reactions once you know the centroids and masses of the geometries (which can be obtained from most CAD packages these days).

If possible, you should calculate the reaction forces by hand before retrieving them from FEA. This is one method of increasing the confidence in your FEA results. It's scary how many folks out there don't do these simple checks to verify their FEA results.

 

[davidrdguez]

Ok, i just checked with a simple element. One has to make separated fixed supports in order to get the reactions in each leg.

I didn't know anything about the probes, i will study these options deeper.

I have to admit how much I trust in FEM softwares. I could do this by hand, but it would take me much longer than with Ansys (now i know how to do it)

Thank you all!