[Solved] A simple issue with displacement between brackets in Caesar II?
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This post was last edited by shiworkstation on 2016-3-8 at 09:20. Points A and B were set as fixed supports, with a straight pipe in between; a 1-kilometer-long steam pipeline was used, and stress testing was carried out under the recommended operating conditions. No errors were detected, and the displacement at all points was 0. But in reality, such a pipeline certainly wouldn’t work. How should this setting be configured in order to identify the problem? Points are given for solving problems, thank you. I happened to watch a video showing exactly this situation; secondary stress does indeed pass through, with no problem at all. It can be seen that the stress condition on the pipe supports where the two fixed points are located is extremely high. So, no error will be reported in this case; it must be analyzed by oneself.
If you use the latest version of the software to do the calculation, you’ll find it doesn’t work. This issue has been resolved after the specification was updated.
So, may I ask in which version this issue was resolved? Thank you! I’m still using version 2013r1 at the moment
The 2013 version doesn’t have this issue, right?
It should not be allowed to have two fixing brackets at both ends of a straight pipe, but the software shows that the secondary stress is acceptable – what’s going on here?
1. Have you entered the temperature and pipe material? (Verification) 2. Have you taken the CII calculation exam elsewhere? CII generates accompanying parameter files when creating a model. If moving a file’s location, it needs to be moved entirely. Otherwise, all the calculated forces, displacements, and stresses will be incorrect. (Note)
This may be related to the secondary stress checking formula. The previous standard secondary stress checks did not take into account the axial stress generated in the pipeline under your circumstances; since there is no bending moment in the pipeline, the secondary stress is 0. The new standards include the forces exerted by the supports at both ends as concentrated forces in the calculation formulas. CAESAR follows the specifications.