Autodesk Robot Structural Analysis

[#1]

What does "sum of val", "check val" precision mean? What does it show?

Does Sum val(ue) give me the sum of forces responsable for the reactions?

[#2]

Check this help topic:

http://docs.autodesk.com/RSA/2012/ENU/filesROBOT/GUID-E272460D-0B05-4F80-AF78-D6D9501131F-818.htm

[#3]

Thanks! Sum of value is still not very clear to me though.

"Sum of val. - An arithmetic sum of values of forces and moments for a given direction for the currently-filtered nodes."

Sum of what values and which direction?

[#4 · Accepted solution]

Take a look below:

- selection in green

- direction = columns (yellow, blue)

[#5]

Thanks. It is simply the total of the reactions of the selected nodes then?

In my case I selected all the nodes, but the the sum of value for the moments are not  equal to the sum of forces.

In fact I changed all my supports to pinned so I didnt have any moments in them, but the sum of reaction for those nodes still remain? I dont get how that adds up.

[#6]

So either you have elastic supports  \ ground on model or you are looking on nonconverged results of nonlinear case.

Example below