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

FIELD: ammunition.

SUBSTANCE: testing axisymmetric fragmentation ammunition with an axisymmetric field of fragmentation. Ammunition is installed in a given position in the center of a semi-cylindrical profiled target wall so that its axis coincides with the axis marked into zones corresponding to the directions of fragmentation in the adopted coordinate system. Symmetrically to the zones of the semi-cylindrical longitudinal wall, a simulator of a structure compartment of the first type, a simulator of a structure compartment of the second type, and a simulator of a structure compartment of the third type are additionally installed as targets. Simulators of structural compartments are completely filled with kerosene and polyurethane foam, or diesel fuel, or hydraulic oil, respectively. The area in front of the simulators is treated with flame-retardant foam. The side walls of the simulators are equipped with n piezoelectric pressure sensors connected to m devices for measuring pressure and shock wave impulse to measure the average maximum pressure of the hydraulic shock , in the simulator after the fragments have broken through its entrance wall. The contours of the projections of the entrance walls of the compartment simulators are applied to the front surface of the target wall zones. Their coordinates are determined in the adopted coordinate system. The ammunition is detonated. The hits are recorded, the number of fragments falling into each zone is caught and counted. The size and area of the holes are measured. Signals from electret sensors placed in the corresponding zones of the target wall and equal in size to these zones are registered and recorded for subsequent processing. The quantitative characteristics of the fragmentation field by masses, velocities, shape and size of the fragments are evaluated. The total number N, mass, speed, shape and size of all fragments that hit the entrance walls of the simulators are determined, as well as the energy values of the flow of fragments that covered the wall of each compartment simulator. The values of the specific energy of the fragment flow are determined. A qualitative assessment of the phenomenon of water hammer of the fragmentation field of ammunition in simulators of structural compartments is carried out according to the principle “destroyed”, “partially destroyed”, “not destroyed”. The value of the water hammer phenomenon indicator for each of the simulators is correlated with the results of a qualitative assessment of the water hammer phenomenon and with the obtained values of the water hammer indicators.

EFFECT: increased information content of tests.

1 cl, 2 dwg