Analysis of the instability problem of externally pressurized cylinders
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What are the basic conditions that must be met when using reinforcing rings, and why?
It is up to you to decide whether to use a reinforcement ring or not; there is no mandatory requirement. For pressure vessels subjected to external pressures, the use of reinforcing rings allows for a reduction in the calculated length, a decrease in the thickness of the cylinder wall, less metal usage, and lower costs.
When designing a reinforcement ring, the most basic requirement is that its actual moment of inertia be greater than the minimum moment of inertia. Can “adopting” be considered as “designing”? Would it be okay if I answered the question this way? :lol