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 Table 4
Design Fragment Weights for Various Design Confidence Levels
Design Confidence
Design Confidence
Level (CL)
Wf/M2A
Level (CL)
Wf/M2A
0.10
0.01
0.90
5.30
0.20
0.05
0.95
8.97
0.30
0.13
0.98
15.30
0.40
0.26
0.99
21.21
0.50
0.48
0.995
28.07
0.60
0.84
0.999
47.72
0.70
1.45
0.9995
57.77
0.80
2.59
0.9999
84.83
12.
EXAMPLE PROBLEMS.
a.
Blast Environment Inside Vented Cubicle.
Problem:
Consider a 4-wall cubicle with a hole in its roof containing a
certain weight of explosive. Determine the pressure-time
loading on a given wall.
Given:
(1) Diameter of hole in roof.
(2) Charge weight and location.
(3) Dimensions of cubicle and the wall in question.
Solution:
(1) Calculate the values of A, W, and V.
(2) Determine parameters A/V2/3, W/V, and A/W2/3.
(3) Find scaled impulse of gas pressure from Figure 10.
(4) Find peak gas pressure from Figure 8 and calculate
fictitious duration of gas pressure.
2.08-58
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