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is

Specific impulse, psims
ig

Impulse of gas pressure, psims
k,k 

Factor to determine form of positive and negative,
respectively, pT curve
kv

Velocity decay coefficient
L

Length, ft
MA

Fragment distribution parameter
Nf

Number of fragments with weight greater than the
critical weight
NT

Total number of fragments
Pmo

Maximum mean pressure, psi
Pr

Peak reflected pressure, psi
Ps

Pressure at time ts, psi
Pso

Peak positive incident pressure, psi
P so

Peak negative incident pressure, psi
(Pso)max

Peak pressure, psi
PDF

Probability distribution function
qo

Peak dynamic pressure, psi
R

Horizontal distance, ft
Rf

Distance from detonation to the protective structure,
ft
RF

Distance to the point on the wall farthest from the
charge
RN

Distance to the point on the wall nearest to the charge
(tA)F

Arrival time blast wave at a point on the wall farthest
from the charge, ms
(tA)N

Time of arrival of blast wave at the point on the wall
nearest to the charge, ms
tc

Average casing thickness, in
tg

Duration of gas pulse, ms
t'g

Fictitious gas pressure duration, ms
2.0866


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