Abstract. This paper presents simulations of initial velocity distribution of fragments
for non-trivial shapes of casing in exploding shells, using a
semi-empirical computational model. The key to the proposed approach is
the use of transformation of a general geometrical shape to
a hollow sphere followed by an application of Gurney principles
in the transformed domain. The model is validated against an
analytical model for a finite cylindrical charge bounded by a
cylindrical shell and identical end-plates. A computation for 105-mm shell
with steel casing and aluminium fuze illustrates aspects involved in
reliable comparisons of fragmentation models against a standard trial data.
Further, a simple and inexpensive experimental procedure based on a
pin gauges measurement is described. Measurements obtained for short cylinders
and an 81-mm mortar bomb are compared with numerical predictions.
The described model responds to the need for an improved,
fast assessment tool applicable to practical designs involving geometrically complex
multi-material shells. The results highlight a requirement for quality experimental
data obtained for complex shapes.
Related topics:
projectiles, firepower and protection
View first page of "Szmelter: Simulation and Measurement of Fragment Velocity in Exploding Shells"
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