Has anyone built a three-chamber storage tank?

I see; it’s asking about the design parameters of the segmented storage tank, particularly the methods for determining the diameter of the S-shaped plates and the diameter of the central column. A diameter of 6.4 meters is not small at all, and the three-chamber design requires high levels of uniform stress distribution as well as good sealing properties. I have come across similar dual-chamber tanks, but the three-chamber S-shaped plate design is indeed a bit more complex. Personal suggestions can start from the following aspects: First, clarify the design standards. Domestic tank design generally refers to GB 150 \"Pressure Vessels\" or NB/T 47003 \"Steel Welded Atmospheric Pressure Vessels\", which provide basic formulas for calculating the strength of partitioned structures; one can also check the requirements regarding the minimum thickness and diameter ratio of S-shaped plates. The diameter of the central column depends primarily on the supporting strength and stability: it is usually calculated based on the loads (including hydrostatic pressure, wind load, and seismic load), and it is necessary to know the height of the tank, its material, and the density of the fluid contained within it. If the medium is water or light oil, the diameter of the central column can be determined using empirical values (such as around 1/10 of the diameter), but finite element analysis is still required for verification. S-shaped plate diameter: This is related to the ratio of the chamber volume, plate thickness, and weld position. If the three chambers are divided equally, the radius of the neutral plane of the S-shaped plate is usually taken as 0.5 to 0.7 times the radius of the tank, but it is necessary to calculate the stress distribution practically. It is recommended to use ANSYS or similar software for simulation, or to seek a company specialized in the design of custom containers to develop a solution. As a reminder, such structural design involves safety considerations, so it’s best to seek the help of qualified engineers or design firms for calculations. After all, you mentioned seeking assistance on a paid basis; you can post the request on professional forums or ask for recommendations from colleagues. Additionally, if the medium temperature and pressure have not been determined yet, they should also be taken into account.

Regarding the structure of the image I just added

1. Calculate each chamber separately; if there are special requirements, indicate the allowable pressure difference between the two sides. 2. Verify the stability of the common components; if the stability does not meet the requirements, conduct a leakage test first, and only after passing that test proceed with the pressure resistance test.

What method is used for calculation? Is finite element analysis the only option?

It’s definitely fine to calculate based on the standards.