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 MIL-HDBK-1013/14
APPENDIX D (Continued)
Testing has shown that peak pressure and pressure-related effects scale as a function
of the separation distance between the explosives and the structure, "R", divided by the cube root
of the charge weight, "W". Design engineers commonly use scaled distance in calculating the
effects of explosions. Equation (D-1) expresses this calculation:
Scaled Distance = R/W1/3
EQUATION:
(D-1)
where:
R = separation distance
W = charge weight
Tables D-1 and D-2 give the peak side-on incident pressure and the peak reflected
pressure as a function of the charge weight and separation distance.
Table D-1
Distances in Feet (Meters) for Peak Pressure From 50- to 4,000-Pound
(22.7 to 1,818 kg) Hemispherical TNT Explosions on the Surface
Reflected R/W1/
Incident
50 lb
220 lb
500 lb
1,000 lb
4,000 lb
3
Pressure
Pressure
(23.7 kg) (100 kg) (227 kg)
(454 kg)
(1,818 kg)
Psi
Psi
(kgf/sq cm) (kgf/sq cm)
100
500
3.7
14
22
29
37
59
(7)
(35)
(4.2)
(6.7)
(8.8)
(11.2)
(17.9)
29
91
6
22
36
48
60
95
(2.0)
(6.4)
(6.7)
(10.9)
(14.6)
(18.2)
(29)
12
31
9
33
54
71
90
143
(0.84)
(2.17)
(10.0)
(16.4)
(21.6)
(27.4)
(43)
8.4
15
11
40
66
87
110
174
(0.59)
(1.05)
(12.2)
(20.1)
(26.4)
(33.4)
(53)
3.6
8
18
66
108
143
180
285
(0.25)
(0.56)
(20.1)
(32.8)
(43.5)
(54.7)
(87)
2.3
4.6
24
92
151
198
250
397
(0.15)
(0.32)
(28.0)
(45.9)
(60.2)
(76.0)
(121)
1.7
3.6
30
110
181
238
300
476
(0.12)
(0.25)
(33.4)
(55.0)
(72.3)
(91.2)
(145)
1.1
2.4
40
147
241
317
400
633
(0.08)
(0.17)
(44.7)
(73.3)
(96.4)
(122)
(192)
0.8
1.8
50
184
301
396
500
793
(0.06)
(0.13)
(55.9)
(91.5)
(120)
(152)
(241)
100
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