Page 145 - Pressure Vessel Design Manual
P. 145
2 3 4 567891 2 3 4 5 67891 2 3 4 5 67891. _I\ 2 3 4 5 67891
w
0 -
".
General formula for cantilever
0
I
which for steel cylidrical shell 2
reduces to S
T = 0.00000765(~~~
where T = period, sec
w = weight, Ib per ft
H = height, ft
D I diameter of shell, ft
t I thickness of shell, ft
Constant 0.00000765 is based upon:
E = modulus of elasticity of steel -
30,000,000 Ib per sq in
I =moment of inertia of shell area
= 3.142 (9)
3
t
K = 1.79 for fundamental period
of vibration
g = 32.2 ft per sec2
1,000 Fiw 3-9. Period of vibration forl@'$!8drical steel 11s. Reprintebw@?rmission of Fluor Daniel,lW!d!%he, CA.
