RU196056U1 - DEVICE FOR PROTECTION OF STRUCTURES FROM HIGH-PRECISION WEAPONS - Google Patents

Abstract

The utility model relates to the field of protection of military construction complexes from being hit by precision weapons, in particular, it can be used to protect special fortifications. and closed at the top with dynamic protection interacting with the explosive. The technical result, which is aimed at The proposed protection device is to reduce the dynamic loads on the protected structure to safe values and ensure its structural integrity when combined with the cumulative jet and the kinetic energy of the explosion. The specified security of special fortifications is achieved by the protection device from high-precision weapons, supplemented by box-type reinforced concrete cells with mounted the bottom with directional explosive charges and closed with a dynamic protection on top interacting with an explosive that attenuates the cumulative or kinetic energy of the munitions of precision weapons.

Description

The utility model relates to the field of defense of military construction complexes from destruction by precision weapons, in particular, it can be used to protect special fortifications.

A device is known for protecting pit structures from high-precision weapons, structurally made in one layer of profile metal with a coating: on top - armored steel (50-75 mm), on the bottom - sheet steel (30-60 mm). In the intervals between the I-beams or channels, reinforcing cages are installed with filling the internal volume with fine-grained concrete of class B-80, B-100 (see Surin D.V. Special fortification structures. - SPb .: VKA named after A.F. Mozhaisky, 2010, S. 101-106, 170-171, Fig. 2.9).

The disadvantages of the device include:

1. An increase in static loads due to the large specific gravity of the structure, which can lead to the collapse of the structure itself;

2. Weak protection against cumulative tandem-type warheads.

A device for protection against cumulative ammunition is known (patent for utility model No. 17362, IPC F41H 5/007, publ. 03/27/2001). This device comprises a housing with a throwable lid and dynamic protection elements placed therein. Protective elements are made in the form of containers in which an explosive layer is located between two metal plates. The containers are installed parallel to each other and at an acute angle to the horizontal plane, spaced apart by a distance that excludes the formation of a detonation chain, and are each limited by a metal bridge. The free zones in the housing between the containers are filled with an elastic inert material.

When an element is pierced by a cumulative jet, the explosive contained in it detonates, and the metal plates of the case begin to fly apart. At the same time, they cross the jet trajectory at an angle, constantly substituting new sections under it. Part of the energy is spent on breaking through the plates, and the lateral impulse from the collision destabilizes the cumulative jet. The specified device reduces the armor-piercing characteristics of ammunition percussion by 50-80%.

The disadvantages of this device include:

1. The residual effect of ammunition of shock type;

2. Low sensitivity when initiated by low-speed kinetic shells and some types of cumulative ammunition.

Known energy-absorbing device (RF patent No. 2274784, IPC F16F 7/12, publ. 04/20/2006), taken as a prototype. This device contains a protective unit mounted in the direction of the damaging effect in front of the protected object, made in the form of a closed chamber filled with protective elements. Protective elements are deformable elements in the form of a loose aggregate of hollow open elements made of a material having a strength less than or equal to the strength of the body material and glass hollow microspheres, the internal volumes of the closed chamber and hollow elements are filled with glass hollow microspheres.

This device absorbs kinetic energy during intense dynamic loading of the structure and provides effective protection against explosion fragments. The disadvantages of this device include inefficiency when exposed to ammunition with a cumulative stream due to the presence of a large number of hollow elements inside the structure.

The technical result, the achievement of which the proposed protection device is aimed at, is to reduce the dynamic loads on the protected structure to safe values and to ensure its constructive integrity when combined with the cumulative jet and the kinetic energy of the explosion.

The technical result is achieved by the fact that in the device for protecting structures from high-precision weapons, consisting of a reinforced concrete slab, according to the invention, box-type reinforced concrete cells are installed on the surface of the slab with directional explosive charges installed at the bottom and closed from above with dynamic protection interacting with the explosive.

The essence of the utility model is that on the surface of the slab there are box-type reinforced concrete cells with directed explosive charges installed at the bottom and closed with a dynamic protection interacting with the explosive.

The device for protecting structures from precision weapons consists of two layers. The bottom layer is reinforced concrete slab made of concrete B35 reinforced with sheet, strip and rolled steel and periodic profile reinforcement, the top layer is a reinforced concrete base on which box-type reinforced concrete cells are installed, on the bottom of which explosive charges of directional action are laid. From above, the cells are closed by dynamic protection with built-in contact fuses, which ensure the explosion of the charge of the lower belt when exposed to ammunition.

A variant of the device for protecting structures from precision weapons is shown in Fig., Where it is indicated: 1 - reinforced concrete slab; 2 - box-type reinforced concrete cells; 3 - charges explosive directed action; 4 - dynamic protection; 5 - contact fuse connected to explosive charges.

The elements of the device are clear from their name.

The operation of the device is as follows.

When a cumulative projectile hits the housing 4, a cumulative jet is formed. When the element 4 is pierced by a cumulative jet, the explosive contained in it detonates, and the metal plates of the housing 4 begin to fly apart. At the moment when the explosive located in 4 detonates, the contact fuse 5 detonates the charge 3 in the cell 2 towards the cumulative stream. This ensures the absorption of part of the energy from the impact of the shock pulse generated from the cumulative jet and the defeat of the ammunition of the WTO. In housing 1, the cumulative jet is finally absorbed. After exposure to a cumulative jet, the housing 1 retains its integrity.

Thus, the protected object (a special fortification structure) does not undergo a destructive effect either from the cumulative jet or from the kinetic energy of the explosion fragments. This implements a device for protecting structures from high-precision weapons, shown in Fig., Which reduces the impact of the cumulative jet and kinetic energy of fragments to a minimum while maintaining the structural integrity of special fortifications.

Evaluation of the proposed device at the Air Force Military Research Center "VVA" using the "Protective Shelter Damage Model" [Certificate RU 2018660294, Register of computer programs, registration date 08.21.2018].

A reinforced concrete slab 60 cm thick was adopted as the initial data. The means of destruction was the GBU-28 penetrating bomb.

The calculations showed that the maximum penetration depth of the weapon in the reinforced concrete slab is 371 mm, and the penetration depth of the weapon in the proposed protection device is 41 mm. That provides a decrease in the penetration depth of the weapon by 9 times. This level of security is achieved by a device having a mass three times smaller in comparison with the mass of existing barriers.

These results indicate the prospects of using the device to protect structures from high-precision weapons, supplemented on the surface of the slab with mounted box-type reinforced concrete cells with directional explosive charges installed at the bottom and closed with a dynamic protection interacting with the explosive.

LIST OF REFERENCES

1 Surin D.V. Special fortifications. - SPb .: VKA them. A.F. Mozhaysky, 2010, 429 p.

Claims (1)

A device for protecting structures from high-precision weapons, consisting of a reinforced concrete slab, characterized in that on the surface of the slab there are box-type reinforced concrete cells with directed explosive charges installed at the bottom and closed with a dynamic protection interacting with the explosive on top.

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