Stiffenring/Verstijvingsring

[Richard]

How should a stiffnessring be inputted in the model , without having problems concerning the diameter/wallthickness ratio?

I tried the following method without result:

• Use a element with a length equal to the width of the ring.
  
• Wallthickness (t) in this element is equal to body-radius of the ring.
  
• Diameter (D) is equal to the outer diameter of the ring.
  

This configuration give the folowing error: "diameter/wallthickness-ratio to large". This is an clear error, because a pipeline with these values will not behave like a thinwalled construction.