METHOD FOR TESTING AXISYMMETRIC FRAGMENTATION AMMUNITION WITH AXISYMMETRIC FRAGMENT EXPANSION FIELD Russian patent published in 2023 - IPC F42B35/00 

FIELD: weapons.

SUBSTANCE: to test fragmentation ammunition with an axisymmetric field of dispersion of fragments, the ammunition is installed in a given position in the centre of a profiled target wall, marked into zones corresponding to the directions of dispersion of fragments. The hits are recorded and the number of fragments that hit each zone is counted. The dimensions and areas of the holes are measured by recording signals from electret sensors placed in the corresponding zones of the target wall, equal in size to them. The characteristics of the fragmentation field by masses, velocities, shape and size of the fragments are evaluated. For this purpose, symmetrically to each zone of the profiled target wall, pre-created simulators of ammunition of the first, second and third types, differing in sensitivity to impacts from fragments, are additionally installed as a target. Additionally, a unit is used to measure the quantitative characteristics of the fragmentation field by mass, velocity, shape and size of fragments and a unit to measure the value of the TNT equivalent of ammunition simulators. Ammunition simulators are separated by armour plates to eliminate mutual influence. Ammunition simulators of the first, second and third types are cylindrical charges of high explosive in a steel shell, low-, medium- and high-sensitive charges, respectively. The projection contours of ammunition simulators are applied to the front surface of the target wall zones and their coordinates are determined. In the unit for measuring the quantitative characteristics of the fragmentation field, the maximum value of the indicator V_0.5^max of the initiating action is determined characterizing the speed of fragments of the tested ammunition, at which, when hitting the simulator of a standard ammunition, with a probability of 0.5, detonation will develop in the explosive charge of the simulator. Using the TNT equivalent determination unit, the TNT equivalent value is determined for each of the ammunition simulators as a result of exposure to the fragmentation field of the ammunition being tested. For each ammunition simulator, the value is compared with magnitude , which characterizes the mass of a cylindrical TNT charge, which creates in the environment a shock wave field similar to that created by the detonation of the tested axisymmetric high-explosive fragmentation ammunition. According to the difference in values , the quantitative degree of initiation of simulators is determined by the fragmentation field of the ammunition being tested. The total kinetic energy of the fragments that hit each of the simulators is determined and the quantitative degree of initiation of the ammunition simulators is correlated with the value of the total kinetic energy of the fragments that hit each of the simulators and the qualitative assessment of the impact results. A qualitative assessment of the results of the impact of the fragmentation field of the tested ammunition is carried out.

EFFECT: information content of the tests is increased due to the additional measurement of particular characteristics at which detonation will develop in the simulator charge, and a quantitative and qualitative assessment of the impact results is carried out.

3 cl, 3 dwg