METHOD FOR TESTING AXISYMMETRIC SHELTER AMMUNITION WITH AXISYMMETRIC AMMUNITION DISPERSION FIELD FOR IGNITION Russian patent published in 2023 - IPC F42B35/00 

FIELD: testing axisymmetric fragmentation munitions with an axisymmetric field of fragmentation.

SUBSTANCE: ammunition is installed in the centre of the profiled target wall, marked into zones corresponding to the directions of fragments expansion in the accepted coordinate system. The ammunition is installed so that its longitudinal axis coincides with the longitudinal axis of the profiled target wall. Profiled target wall is semi-cylindrical. Symmetrically to the zones of the semi-cylindrical longitudinal wall, simulators of fuel tanks of the first and second types, and a simulator of a compartment with pipelines are installed. On the front surface of the target wall zones located symmetrically to the simulators, the dimensions of the input walls of the compartment simulators are applied and their coordinates are determined in the accepted coordinate system. The ammunition is detonated. Hits and the number of fragments in each of the marked zones are recorded. The size and area of holes from fragments are measured. Signals are recorded from electret sensors placed in the corresponding zones of the target wall and equal in size to them for further processing. The quantitative characteristics of the fragmentation field by masses, velocities, shape and size of the fragments are evaluated. A qualitative assessment of the incendiary action of the fragmentation field of the ammunition is carried out according to the principle "ignites", "partially ignites", "does not ignite". The kinetic energy of the fragmentation damage field covering the input walls of the simulators is determined. For the simulators the total number of fragments N, the total areas of holes in the entrance walls of the simulators S_∑, the value of the specific impulse and the parameter of the vulnerability of fuel tanks to the incendiary action of the fragment (parameter χ) for each fragment that hit the simulator, the maximum values of the specific impulse and parameter χ of the fragment that got into the simulator, the minimum values of the specific impulse and parameter χ of the fragment that got into the simulator, the average values of the specific impulse and parameter χ are determined; for all fragments that got into the simulator, the fact of defeat / non-damage of the simulator by the incendiary action of the fragmentation field of the ammunition is correlated with the values of the average values of the specific impulse and parameter χ for all fragments that got into the simulator, whereas the value of the parameter χ determined from the ratio χ = S^1/2_mV , where S_m is the area of the midsection of the fragment, V is the speed of the fragment at the moment when it contacts with the obstacle.

EFFECT: increased informativeness of tests due to additional determination of particular characteristics of the incendiary action of the fragmentation field of the tested ammunition.

1 cl, 4 dwg