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Hydraulic cylinder buckling according to DNV code 2009

Hydraulic cylinder buckling according to DNV code 2009

Hydraulic cylinder buckling according to DNV code 2009

(OP)
Good morning all,

I know this topic has been discussed around but all threads mostly locked. What I am confusing is Euler buckling check for a pinned-pinned connection of rod in fully extracted cylinder on chapter 3.7.4 is Peu = pi^2*E*I/(2*L^2), from other sources the formular is Peu = pi^2*E*I/L^2 (effective length factor k = 1). Does it mean that they devided by 2 for safety factor purpose? The link of code shown in below:
https://rules.dnvgl.com/docs/pdf/DNV/tap/2009-10/T...
Sorry if my post is not very clearly.

thanks a lot for your kind help!

RE: Hydraulic cylinder buckling according to DNV code 2009

I don't know. Dividing by a safety factor there doesn't make sense because they're comparing it to the ultimate load, not to the allowable load- putting a SF of 2 there would give an overall SF of 8.

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