Multiple load cases on Workbench

[Anthony Aponte]

Did you ever use ANSYS to evaluate Euro Code compliance of a silo / a structure? Idea is have some basic loads ( pressure, weight, wind, earthquake ) and starting from them evaluate al long list of combinations. Coefficients and combinations are clear, this is not the topic of this post.

If I have 100 combinations I can duplicate 100 times the static structural and setup each one with all the needing basic loads multiply by the correct factors. It work but it is vvery long way.

I seen on tutorials ( is here:

https://www.youtube.com/watch?v=0wRsK5QU5Qs

) that it is possible prepare 1 substep for each basic single loads ( alone without the others and after that, thru the APDL command console writting some code that formalizile how to scale is basic loads and what to add together.

It work: displacements and loads on fondations are indicated but stress is always zero. I don't understand why...

Franckly speaking I don't think the solution combination proposed by ANSYS is correct because this way kills all the not linearity of the system, so for example on nozzle where are reinforcing plates with a frictional contact we don't will evaluate the real situation.

Some advise?

 

[NRP99]

Principal of Superposition is not applicable to nonlinear analysis. Solution combination in ANSYS does exactly the same. You need to setup these analysis if you have to. But I would reduce the case count by considering the critical ones first and/or compare the magnitudes of loads.

 

[Anthony Aponte]

Thanks