How should the thickness of a pressure vessel cylinder be calculated under external forces?
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When designing a horizontal heat exchanger with a fixed tube sheet, the shell is made of 20# tubes of type 6479 with dimensions of φ426×10, depending on the operating conditions. It is necessary to install an electric motor weighing around 1.6 tons on the shell, as well as a compressor weighing about 2 tons. I wonder if there are any simpler methods, other than stress analysis tools like ANSYS, that can be used to determine whether the existing shell can withstand such loads.
Convert the weight of the shelves and equipment into pressure, use this pressure for external pressure calculations to determine whether the cylinder will hold. This can be regarded as a reference calculation and cannot be used as an official calculation document.
Ultimate pressure capacity = 210 x wall thickness × outer diameter
Is there cyclic stress? Is it better to use a separate bracket?
Convert the external loads into forces and moments; it can be calculated using the local stress from SW6’s component module, right? However, high-frequency alternating loads such as those from motors are problematic; try to avoid connecting them to the container.
Well, in theory it’s best to avoid placing things on the container, but I work on refrigeration systems. Since the overall size of such a refrigeration system is small due to the compressor unit, there’s no other way but to stack the various components together – lol
Oh, I see. It’s oil-cooled, right? Generally, the compressor is placed on the oil separator, with the oil cooling system on the side.
No, it’s the condenser: lol
Personally, I think the shear force can be roughly calculated using the methods for simply supported beams. For proper handling, finite element analysis is the best approach.
Mm-hmm, thanks. Just handle it simply; I just need to be aware of it