FEA: First two values in convergence plot

[uw]

Hello to all Inventor gurus!

I use the FEA-Tool in Autodesk-Inventor relatively often, and I am familiar with the methods of h-and p-refinement, I understand problems of singularities and I think I can interpret a convergence plot.
But(!) I do not understand one thing:
What do the first two values in the convergence plot mean?

Obviously, the second is exactly the double of the first value?

Thank you in advance for your help!
Greetings from austria,

 Reinhard

[JDMather]

Can you Attach your file here?

[uw]

Thank you for the fast answer!

Regardless of whether h-refinement is activated and/or "Create Curved Mesh Elements" is turned on, this effect occurs in every(!) FE-analysis!

In this example I have used h-refinements:

The first value is 1,189 and the second value is 2,378 (exactly the double).

[uw]

Hello!

I have verified this behavior of the convergence-plot in many FE-simulations. Unfortunately i still have no idea, what half the value is supposed to be!
I hope someone can give me a tip!

Greetings from austria,
 Reinhard