RU2374600C1 - Tank fragmentation-particle projectile "dust" with high-density bundle of ready damage agents - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: projectile comprises body, in front part of which there is a block of ready damage elements or block of specified crushing, and in the rest part of body there is a charge of explosive substance with bottom detonator. Weight of one of ready damage element or fragment of specified crushing makes from 0.2 g to 0.4 g, at the same time number of ready damage elements or fragments of specified crushing in block makes 6000-25000.

EFFECT: dramatically increased survival rate of tank in battle field.

2 cl, 4 dwg, 3 tbl

Description

The invention relates to ammunition, and more specifically to fragmentation-beam shells, primarily tank, creating axial and circular fields of destruction.

The article [1] describes a 125 mm tank fragmentation-beam projectile and its characteristics. The projectile contains a housing, in the front of which there is a block of ready-made striking elements (GGE), and in the rest of it there is an explosive charge (BB) with a bottom detonator. The GPE block has a mass of 2.5 kg, contains 500 pcs. GGE, each of which has a mass of 5 g. When the shell explodes 20 m from the target, the radius of the affected circle is 7 m according to the updated data, and its area is 154 m ² , which gives an average GGE density of 3.25 pcs / m ² .

The closest analogue is a tank fragmentation-beam projectile, known from RU 2309375 C1, publ. 10/27/2007.

The main disadvantage of the prototype is the low density of the axial flow (beam) and, as a consequence, the low probability of hitting the target. The main goal for fragmentation-beam shells is tank-dangerous manpower (for example, a grenade launcher with a manual anti-tank grenade launcher or calculation of the installation of an anti-tank guided missile (ATGM)), which has a fairly small projection area on the platform perpendicular to the axial flow of the GGE (0.3-0.4 m ² ). With statistically inevitable large distances between the target and the point of detonation, the flux density becomes unacceptably low. The range spread of modern trajectory blasting systems is estimated as ± 10 m, i.e. blasting at a nominal distance of 15 m ranges range is 5 ... 25 m. Table 1 shows the values of the average density of the field having a dynamic half-angle 20 ° and the probability of hitting the target area of 0.3 m ² at least one GGE GGE distribution in cross section the beam is assumed to be uniform, the probability is calculated by the formula: p = 11-e ^{- <p}

Table 1 Detonation range, m 5 10 fifteen twenty 25 The average density of the GGE in the cross section of the beam, 1 / m ² 48.1 12.0 5.3 3.0 1.9 The number of GGEs that hit the target with an area of
0.3 m ² 14,4 3.6 1,59 0.9 0.576 Probability of defeat 1,0 0.97 0.80 0.59 0.44

For large detonation ranges, the probabilities are completely unacceptable and do not ensure the survival of the tank in battle. According to [2], for 125 mm tank fragmentation-beam shells, in particular for Tverich-type shells, it is necessary to focus on the value of the probability of hitting a target with one shot equal to 0.7 (Fig. 7). The probability of hitting the target with two shots will be 0.91.

The present invention seeks to remedy this drawback. The technical solution consists in the fact that the tank fragmentation-beam projectile contains a body, in front of which a block of ready-made striking elements or a block of predetermined crushing is placed, and in the rest of the body a charge of explosive with a bottom detonator is placed, characterized in that the mass of one ready-made striking element or a fragment of a given crushing is from 0.2 to 0.4 g, while the number of ready-to-use striking elements or fragments of a given crushing in the block is 6000-25000.

Thus, the mass of the GGE decreases sharply (15 ... 50 times), due to which the density of the GGE field increases by the same number of times. GPE mass will be 0.2 ... 0.4 g. With this mass value, a quite satisfactory effect on unprotected parts of manpower is ensured, given the high initial velocity of the projectile (850 m / s) and the relatively short range of tank firing at tank dangerous targets (1 ... 3 km).

Illustrations: figure 1 - tank fragmentation-beam projectile, figure 2 - scheme of the projectile, figure 3, 4 - shells with blocks of a given crushing.

The projectile of FIG. 1 generally comprises a head contact assembly 1, a head cap 2 with lightweight aggregate 5, a GPE block 4 supported by a diaphragm 5 located in the shell body 6. In the rest of the casing, there is an explosive charge (BB) 7, a bottom trajectory fuse 8, an optical window 9 for inputting the installation after the projectile leaves the barrel and a stabilizer 10. The head contact assembly is electrically connected to the bottom fuse and allows firing with a shell burst upon impact on the ground. Various schemes of fragmentation-beam shells are considered in patents [4].

The action of the projectile is shown in figure 2. Here D is the distance to the target at the time of the shot, determined by the laser range finder, S is the path traveled by the projectile to the moment of detonation, determined by the temporary installation, U is the anticipated range of detonation. The case of shooting with a minimum projection of the target is shown.

Table 2 presents the values of the ballistic coefficient calculated by the formula

the speed of the GGE approach to the target, calculated as

V = V _o exp [-Ax],

V _o - the initial velocity, taken equal to 1000 m / s,

x is the distance traveled, in this case 25 m, of the kinetic energy of the GGE, its area, and the specific kinetic energy.

table 2 GGE mass, g 0.2 0.3 0.4

Ballistic coefficient

0,034 0,030 0,027 The speed of the GGE approach to the target, m / s 427 472 509 Kinetic energy of GGE, J 18.2 33,4 51.8 The midshiping area of the GGE, mm ² 9.5 13.7 16.6 Specific kinetic energy

1.92 2.44 3.12

According to [3] (p. 189, table 16.57), the critical value of the specific kinetic energy for unprotected “soft” targets is 1 J / mm ² , thus, with a mass of 0.2 g or more, the defeat condition is fulfilled in excess.

The average area of the unprotected sector of manpower is 0.1 m, the vulnerable area is 0.5 of this value. Table 3 shows the values of the number of GGEs falling into the unprotected sector of the target and the probabilities of destruction (block mass 2.5 and 5.0 kg, beam half-angle of 20 °, maximum blasting distance of 25 m, beam cross-sectional area of 260 m ² .

Table 3 Unit weight, kg GGE mass, g 0.2 0.3 0.4 The number of GGE in the block 2.5 12500 8333 6250 5,0 25,000 16666 12500 The average density of the GGE in the cross section of the beam, 1 / m ² 2.5 48.1 32,0 24.0 5,0 96 64 48 The mathematical expectation of the number of GGEs falling into the vulnerable area of the unprotected sector of the target 2.5 2,4 1,6 1,2 5,0 4.8 3.2 2,4 Probability of defeat 2.5 0,909 0.798 0.699 5,0 0,992 0.959 0,909

It follows from the table that the mathematical expectation of the number of GGEs falling into the vulnerable area of an unprotected sector of manpower is at least one.

The values of the probability of injury with a mass of 2.5 kg exceed 0.69, and with a mass of 5 kg exceed 0.9. This confirms the fact that high-density flows with a small mass of GGEs are quite effective. Note that in this case, we deliberately refuse to defeat the target sectors protected by personal protective equipment (PPE) in an axial flow, as well as from the defeat of unarmored vehicles and light armored vehicles. These targets can be hit by a circular field of fragments of natural fragmentation of the shell. The probability of this lesion increases in shrapnel-fragmentation shells of the Tverich scheme [2].

Figure 3, 4 shows the design of the projectile with the replacement of the GGE block by a block of a given crushing (ZD). Block ZD 11 in the form of a solid body is made by the method of sequential deposition on the surface of the body of drops of molten metal formed when exposed to a laser or electron beam supplied to the melting zone. The drop mass is changed by changing the diameter of the electrode, its feed rate and beam power. The adhesion of the solidifying drops to each other is ensured by the interaction of the semi-liquid outer layers of the drops. Figure 3 shows the design with the placement of the block outside the head of the housing. Such a scheme, but for the GGE block, was proposed in RF patent No. 2327948. Figure 4 shows the execution by the specified method of the head of the hull in conjunction with the block ZD. The present invention is based on a fundamentally new look at the methods of defeating tank dangerous personnel. According to modern Russian standards [3], for artillery shells of medium and large calibers, a fragment or GGE with a mass of less than 0.5 g is considered to be non-breakdown and is not included in the fragmentation spectrum. The technical result of the invention is a sharp increase in the survival of the tank on the battlefield.

Literature

1. Odintsov V.A. New shell for tanks. // Military parade, 1996, November-December.

2. Odintsov V.A. New types of fragmentation-beam shells. // Defense equipment - 2007, No. 3-4.

3. The physics of the explosion. / Ed. L.P. Orlenko. In 2 volumes, vol. 2, FIZMATLIT, 2004.

4. RU 2018779, RU 2095739, RU 2108538, RU 2137085, RU 2148244, RU 2158408, RU 2194240, RU 2208759, RU 2237231, RU 2247929, RU 2300073, RU 2309371, RU 2309372, RU 2309373, RU 2309374, RU 23279494.

Claims (2)

1. Tank fragmentation-beam projectile containing a body, in the front of which a block of ready-made striking elements or a block of predetermined crushing is placed, and in the rest of the body there is a charge of explosive with a bottom detonator, characterized in that the mass of one finished striking element or fragment of a predetermined crushing is from 0.2 to 0.4 g, while the number of finished striking elements or fragments of a given crushing in the block is 6000-25000. 2. The projectile according to claim 1, characterized in that the predetermined crushing unit is made by the method of successive deposition of molten metal droplets formed on the surface of the casing upon exposure to a laser or electron beam supplied to the melting zone.

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