| Applies To | |
| Product(s): | AutoPIPE Vessel |
| Version(s): | ALL |
| Area: | Error message |
| Date Logged & Current Version | April 2018 40.06.00.07 |
Problem:
The following message appears:
LOCAL LOADS (Cylindrical SHELL Tb1): PD 5500 Figure G.2.2-18 deflections of cyl. shells due to radial loads, values beyond curve boundaries (r/t=30,5 , L/r=1,573771)", i would like to know, what does it mean "PD 5500 Figure G.2.2-18
Why is the message appearing and how to avoid it?
Solution:
All of the design codes have some dimensional parameters based on vessel geometry which needs to be within boundaries to use the aforementioned methods.
As the error message above indicates:
Local loads - type of calculation being performed.
(Cylindrical SHELL Tb1): - the issue is related to Cylindrical shell with item number TB1
Designation = Cylindrical SHELL
tag = TB1:
PD5500 Figure G.2.2-18 see figure from respected code
Note: This graph was located on page G/25 of BS PD 5500 - 2012+A3 2014
(r/t=30,5 , L/r=1,573771) - AutoPIPE Vessel calculated dimensionless ratios:
- r/t=30,5 however graph range = 15 to 40
- L/r=1,573771 however graph range = 3 to 20 (Value is outside of range, Error)
Therefore you have the following options:
Option #1: Modify the parameters of the model in order for the dimesionless ratios to be within graph ranges
Option #2: Change the designing method to a different local method in AutoPIPE Vessel
Option #3: Use a Finite Element Analysis. AutoPIPE Vessel has interface with NozzlePro.