Tower equipment design: How to calculate tower equipment supported by ear-type supports?

Fortunately, the tower isn’t very tall; there seems to be no clear standard for calculating this in this case. It might be possible to use the standards for ear-type supports for such calculations, or, given its large size, the rigid ring standards defined by HG could be applied. Both of these standards apply to the supports and the cylinders in which they are located; there is no calculation method for cylinders in other areas. The standard seismic model for towers assumes that the equipment is placed on the ground; since it is not possible to apply the response spectrum in cases where the equipment is mounted on a frame, due to effects such as the acceleration of the frame itself, this portion of the seismic force cannot be calculated using software. For your case, I personally think it’s better to take a more conservative approach by calculating how thick the ear section needs to be; if the pressure isn’t high, opt for a larger safety margin when choosing the value. However, this ear mount also has a relatively large opening, which is likely to have a significant impact. Firstly, it’s probable that a rigid ring cannot be used, and the standard ear mount may not be sufficient. Secondly, the bending moment at the ear mount location will definitely be high; having such a large opening will surely lead to weakening of the structure. Determining how to account for this weakening is quite challenging. It’s recommended to find someone experienced to do the calculations and take the measurements. If a thorough calculation is indeed required, the volume of work involved is likely to be substantial. This is just my personal opinion for discussion purposes: first, it’s necessary to determine the seismic impact coefficient for the frame structure; structural analysis and design software such as Midas seems to be able to provide this value. Once this coefficient is known, it can be used to calculate the various seismic forces acting on the equipment. However, this large opening still cannot be taken into account. Maybe I’m overcomplicating things; I’m just trying to spark a discussion so that everyone can talk about it.

You calculate the various loads at the support points, including wind loads, seismic loads, as well as forces and moments in different directions, and then perform the calculations using formulas

The calculation model for the equipment itself is based on the tank, and the wind load and seismic loads acting on the lugs, as well as the local stresses at those lugs, are checked separately

How to calculate the tower hoop for a vertical tank supported by supports?

The second floor is truly expert-level; that air intake at the bottom does affect strength.