I have a question regarding the calculation of PV and SW6
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I encountered this issue while calculating a tower: I needed to design a packed tower with a pressure of 0.8 MPa. At the top head of Tower A, there was a short section and a conical portion that connected it to another tower, Tower B. When calculating A using PV, the weight of B, which is 40T, is considered as a load applied at the center of the upper head; this calculation shows that the wall thickness of the cylinder needs to be 12 mm. As for the check of the skirt foundation, it involves determining whether the concrete stress exceeds the allowable limit or whether the bolts fail to meet the required specifications ； When using SW6 to calculate A, the weight of B is treated as an eccentric load, resulting in a cylinder wall thickness of 6 mm; the calculation for the skirt also proves to be correct. Does anyone who is an expert know why there are such large differences in the results produced by these two software programs?
Actually, your calculation is wrong from the start; this kind of connection is not just a matter of additional weight.
It is incorrect to apply the load of tower B at the top to the center of the upper head; this is equivalent to having such a large concentrated load at the top, and with heavy weight at the top, the structure below must naturally be very strong. This structure can be calculated as a single tower, with only a conical section having a critical cross-section.
For the entire tower, taking into account the strength of the conical sections, it’s sufficient to include the weight in the attachments to calculate the total load
In SW6, how do I add Tower B on top so that it’s counted as part of the entire tower? It only has the upper and lower end caps; no data can be added to the end cap of Tower B
Structural form with Towers A and B connected together
You can simply add the weight of the head on Tower B to the attached mass
You can simply add the weight of the head on Tower B to the attached mass
You can simply add the weight of the head on Tower B to the attached mass