| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Environment: | N/A |
| Area: | Settings |
| Original Author: | Bentley Technical Support Group |
| Date Logged & Current Version | March. 2017 11.00.00.22 |
Problem:
How does "Use corroded thickness in all analysis" on Edit Model options dialog different from "Use nominal thickness" on Results Model Options dialog?
Solution:
The Edit Model Option "Use corroded thickness in all analysis" setting is often confused with Results Model Option "Use Nominal Thickness" setting. These are 2 complete different settings that affect the application in different ways.
"Use corroded thickness in analysis"
One of the first analysis performed by AutoPIPE is in an area of the program referred to as the pre-processor. The program will break up the entire model into a number of stiffness equations that are all solved simultaneously with matrices. This setting will control which wall thickness is used in solving these matrices for calculating displacement, forces, and moment.
Enabling this setting may lower forces and moments, however most piping codes insist on using nominal thickness for the flexibility analysis. After changing this setting, the model should be re-analyzed.
"Use nominal thickness"
This setting does not affect the calculations of moments. The input in this field determines which pipe wall thickness value is used in stress calculations in the Post processor. After the Force and Moments have been computed, the stress are calculated.
See AutoPIPE help for complete details on these settings.
See Also
Tools> Model Options> Edit settings