Definitions of long cylinder and short cylinder for externally pressurized vessels
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What are the definitions of the long cylinder and short cylinder in externally pressurized vessels? Thank you all.
This post was last edited by ylb913 on 2016-9-18 at 20:22. Basic concepts: long cylinders and short cylinders. When the ratio of the length to the diameter of a cylinder is large, its middle section is not supported by the end caps or reinforcing rings; during elastic instability, a wave number of n=2 is formed. Such cylinders are called long cylinders. The critical pressure of long cylinders does not depend on their length, but only on the ratio of the cylinder’s thickness to its diameter. When the ratio of the length to the diameter of the cylinder is small and the instability wavenumber is greater than 2, it is called a short cylinder. Or: It is a long cylinder when L＞Lcr, and a short cylinder when L＜Lcr. See my main post: Calculation of the negative pressure resistance capacity of coking towers: http://bbs.hcbbs.com/thread-1288255-1-1.html