Hello All,

I am performing slug flow analysis at the inlet of slug catcher. I have performed dynamic analysis before by generating spectrum vs DLF and applying the slug force (F) at inlet. However, I would like to know if there will be any difference if I perform quasi-static analysis (static analysis in Caesar-II instead of dynamic) and applying the force of magnitude (F x DLF) at the inlet node? Note that DLF is my load factor from Caesar-II but instead of performing dynamic analysis now I want to model the force in static analysis. Any light on this subject will be appreciated.

Thank you.

Dynamic analysis considers the various dynamic shapes the system can take when the load is applied - the mode shapes.
Static load, alone, may not develope these shapes.
If you can't reproduce the shape, you cannot say the stress distribution is proper. That's one thing.
The program combines the response for each mode to give the total system response. If you are not running a time history analysis, these modes are probably combined by SRSS with some adjustment for closely-spaced modes of vibration. SRSS of many modes is not the same as the static solution of the induced load (induced = applied * DLF).