Page 41 - Pressure Vessel Design Manual

General Design 27

Table 2-lc
Moment of Inertia of Composite Stiffeners

- f2 ti H3
11 =-
12

I - Iz == -
H 12

1

1
1 3 3 0.375 0.5 2.63 0.87 2.50 2.84
2 3 4 0.5 0.5 3.50 1.17 2.50 -3.80
3 4 4 0.375 0.5 3.50 2.04 3.28 6.45
4 4 5 0.5 0.625 5.13 2.77 3.41 9.28
5 4.5 5 0.5 0.5 4.75 3.85 3.57 0.125
6 5 4 0.5 0.625 5.00 5.29 3.91 15.12
7 5.5 4 0.5 0.5 4.75 6.97 4.01 17.39
8 6 5 0.5 0.625 6.13 9.10 4.69 25.92
9 6 6 0.625 0.625 7.50 11.37 4.66 31.82
10 5.5 6 0.875 0.875 10.01 12.47 4.42 37.98
11 6.5 6 0.75 0.75 9.38 17.37 4.99 48.14
12 7 6 0.625 0.75 8.88 18.07 5.46 51.60
13 8 6 0.75 1 12.00 32.50 6.25 93.25
14 8 6 1 1 14.00 43.16 5.93 112.47

Moment of Inertia of Stiffening Rings

Figure 2-1 h. Case 1 : Bar-type stiffening ring. Figure 2-li. Case 2: T-type stiffening ring.