I am performing Structural analysis of a bracket which holds a tube and the tube carries a gas which is under pressure.
In my current setup, i have a hollow tube which must be carrying gas at certain pressure.
Could anyone please help how I can simulate the gas flowing in the tube for my structural analysis?
Thanks & Regards,
Solved! Go to Solution.
Well, the simplest FE analysis is to apply a pressure load to the tube and perform a linear static analysis of the full structure considering the gas pressure constant. Next you can study dynamic analysis to compute the transient response of the structure, in case you know the dynamic nature of the gas excitation (ie, perform a Dynamic Time History Analysis).
The Dynamic analysis could be linear or nonlinear, depending of the level of the excitation, if causing large displacements effect (geometric nonlinearity) or material nonlinearities. If the structural behaviour is linear, from the point of view of the dynamic analysis is preferible to work in the frequency domain instead time domain due to performance issues.
Here you are a tube excited dynamically in the time domain under an internal variable pressure:
And here you are the dynamic response performing a modal frequency dynamic response analysis using NX NASTRAN (SOL112):
You have to know the transient nature of the load, once you know this value (in geneal your contractor will give you this data) simply enter in NX AdvSim and assoacit the time curve to the pressure load.
Here you are a few different types of transient dynamic (vs. time) excitations: