Validation of FEA results

[CSunny]

I submitted one of my designs for provincial registration with ABSA. The reviewer is asking us to validate the FEA results. Can someone let me know how I can validate the FEA results?

I have attached link to the FEA study that I performed.

[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1683129591/tips/FEA_-_WYE_r89sss.pdf

 

[IdanPV]

Your report shows that calculate reaction forces=FEA reaction forces within 2%, that shall be sufficient for J.6.7
Note that what is acceptable for validation varies by reviewer, and some may ask to validate the result using basic hand calculation (membrane stress calcualtion for example). You can do it and compare the results.

You may find those links helpful:
1.

https://test.becht.com/becht-blog/entry/submitting-an-fea-report-to-absa/

2.

https://www.pveng.com/fea-submission-requirements-post/

 

[TGS4]

Good ideas, IdanPV. As the author of blog #1 that IdanPV referenced, I will second the suggestion that anything that you can do with a hand-calc is a good idea.

A couple of notes:
- Your report, seeing as how you are validating this for VIII-1 construction, should reference VIII-1 Appendix 46.
- Your end restraints appear simplistic. Is the vessel end truly going to have identically-zero displacements?
- Following the rules of Appendix 46, you have failed to demonstrate protection against the following failure modes:
- Local Failure
- Buckling (Have you checked that all of the stresses are tensile even for the internal pressure condition? What about the zero-pressure condition? Any external pressure conditions?)
- Ratcheting
- Fatigue (unless you have passed a fatigue screening assessment)
- I don't see any stress classification lines.
- You haven't identified whether the tetrahedral elements that you are using are first or second order. Which is it?

Consider yourself lucky that the design survey engineer has only asked for validation. This report, in my opinion, is severely deficient.