TY - JFULL
AU - G. Tanapornraweekit and W. Kulsirikasem
PY - 2012/7/
TI - FEM Simulation of HE Blast-Fragmentation Warhead and the Calculation of Lethal Range
T2 - International Journal of Mechanical and Mechatronics Engineering
SP - 1069
EP - 1074
VL - 6
SN - 1307-6892
UR - https://publications.waset.org/pdf/6890
PU - World Academy of Science, Engineering and Technology
NX - Open Science Index 66, 2012
N2 - This paper presents the simulation of fragmentation
warhead using a hydrocode, Autodyn. The goal of this research is to
determine the lethal range of such a warhead. This study investigates
the lethal range of warheads with and without steel balls as
preformed fragments. The results from the FE simulation, i.e. initial
velocities and ejected spray angles of fragments, are further processed
using an analytical approach so as to determine a fragment hit density
and probability of kill of a modelled warhead. In order to simulate a
plenty of preformed fragments inside a warhead, the model requires
expensive computation resources. Therefore, this study attempts to
model the problem in an alternative approach by considering an
equivalent mass of preformed fragments to the mass of warhead
casing. This approach yields approximately 7% and 20% difference
of fragment velocities from the analytical results for one and two
layers of preformed fragments, respectively. The lethal ranges of the
simulated warheads are 42.6 m and 56.5 m for warheads with one and
two layers of preformed fragments, respectively, compared to 13.85
m for a warhead without preformed fragment. These lethal ranges are
based on the requirement of fragment hit density. The lethal ranges
which are based on the probability of kill are 27.5 m, 61 m and 70 m
for warheads with no preformed fragment, one and two layers of
preformed fragments, respectively.
ER -