C. Piping model with beam and soil does not converge, what should be done in AutoPIPE to avoid?


Applies To
Product(s):AutoPIPE
Version(s):ALL;
Area: Analysis
Original Author:Bentley Technical Support Group
Date Logged
& Current Version
Sept. 2016
10.01.00.09

Problem:

When analyzing a model beam and soil properties the following occurs:

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Confirm
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The load case did not converge. Do you wish to continue iterating?
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Yes   No   Cancel  
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The dialog keeps reappearing regardless of the number of times Yes is pressed. 

How to resolve this issue?

Solution:

Rule out each group by removing it from the model and try to again run the analysis.

First create a copy of the original model. With the copied file, try and increase all the soil properties to extreme stiffness values as if it was rigid.

Does the system converge in an analysis? 

If No, than try removing all beams / frames in the model. All supports should be connected to ground.

Does the model converge?

If Yes, add the original soil properties back into the model.

Does the model converge?

If Yes, recommend in depth review of each beam to be sure they are all correctly connected and has the sufficient beam properties. Add / Remove beam as required to narrow down the offending beam / frame.

Note: if modeling piping resting atop the soil, you may need to consideremodeling using V-stop Supports

See Also

What to do when "load case did not converge"

Bentley AutoPIPE