Hi,
I am doing an assignment on a process loop in which a centrifugal pump is pumping water through a long spool into a process tower (height = 50 m). During an earthquake, the liquid line towards the process tower showed excessive vibration. The entire spool has supports installed. My assignment is to analyse the spool in AutoPIPE to find whether the installed supports are sufficient or not and properly located or not.
I have a few queries:
1) How can I add pump vibration to the spool without actually modeling the pump? Is there a way to impose those vibrations on the pump discharge nozzle in the piping model?
2) While inserting supports, AutoPIPE asks about the gaps. If I run a static analysis, the displacement on these supports comes out to be more than that gap. For example, if I specify a gap of 3 mm left and right, displacements up to 6 or 7 mm are observed at some supports. Whereas the stress analysis shows no zone with stress ratio higher than 1. Is it OK or does this mean that the support has failed?
Please help.
Hello Bilal,
With regards to your questions:
Answer: AutoPIPE is able to run different types of dynamic analysis:
You would use the Harmonic Analysis feature to model your pump vibrations on the piping system.
Answer: The WIKI pages answers a lot of questions such as this, please review the following WIKI page here, see item #6.
Regards,
Mike Dattilio
Bentley Product Advantage Group Analyst
AutoPIPE Product Line Bentley Systems, Inc.
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