WO2011138025A1 - Device for protecting an object at least from shaped charge jets - Google Patents

Device for protecting an object at least from shaped charge jets Download PDF

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Publication number
WO2011138025A1
WO2011138025A1 PCT/EP2011/002225 EP2011002225W WO2011138025A1 WO 2011138025 A1 WO2011138025 A1 WO 2011138025A1 EP 2011002225 W EP2011002225 W EP 2011002225W WO 2011138025 A1 WO2011138025 A1 WO 2011138025A1
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WO
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Patent type
Prior art keywords
electrode
object
plate
armor
characterized
Prior art date
Application number
PCT/EP2011/002225
Other languages
German (de)
French (fr)
Inventor
Klaus Thoma
Matthias Wickert
Siegfried Nau
Richard Cunrath
Jürgen KUDER
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
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Filing date
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00Armour; Armour plates
    • F41H5/007Reactive armour; Dynamic armour

Abstract

A description is given of a device for protecting an object (8) at least from shaped charge jets (1), comprising an electrode arrangement which provides at least one first electrode (6), facing the object, and at least one second electrode (4), facing away from the object, between which an electrical voltage is applied. The invention is distinguished by the fact that at least the second electrode (4), facing away from the object, is part of a composite armour plating (V).

Description

A device for protecting an object against shaped charge jets at least

technical field

The invention relates to a device for protecting an object against shaped charge jets at least having an electrode assembly, moving at least a first object and at least one second electrode facing away from the object provides, between which an electrical voltage is applied.

State of the art

an array of explosives up.With the explosive to a conical or semi-spherical metal liner shaped charge jets are generated on detonation and in particular to penetrate armor suitable. such

Shaped charge jets are characterized by a unidirectional oriented, developing in the way of detonation matter beam. The hollow charge jet includes velocities in the range of about 7 km / s to 10 km / s at the top. Meets such a shaped charge jet with an obstacle, such as a

Armor, so the materials of the armor behavior due to the occurring by the high jet velocity jet pressure in the order of several hundred GPa, almost as liquids so that the shaped charge jet penetrating the layer materials according to the laws of hydrodynamics, whereby ultimately the high penetrating power of such hollow charge jets founded. See Walter, WP; Zukas, JA (1989) Fundamentals of shaped charges, New York: In addition to efforts to improve the penetration of shaped charges John Wiley & Sons, Inc .., are simultaneously developed protection orders, whose mission is to

Destructive effect of shaped charge jets of objects, how to minimize, for example armor. From here onwards, thus concern the protection of objects against the effects from shaped charge jets.

In an article by Demidkov SV, "The ways of the shaped charge jets functional parameter electromagnetic control efficiency amplification", 20 th International Symposium on Ballistics, Orlando, FL, September 23 to 27 2002, described the coupling of an electric current pulse in a shaped charge jet . the simplest configuration to study this electromagnetic interaction, provides for the arrangement of two metal plates 4, 6, see Figure 2, through an insulator, such as air, are arranged separately from each other. the metal plates 4, 6 are each connected via a feed line with a pulse power source 7 is connected, which is preferably designed in the form of a capacitor bank 7. the hollow charge jet 1 occurs in Figure 2 at first coming from the left by the object 8 opposing electrode 4 through. If the connection of the

Shaped charge jet 1 with the object 8 facing the second electrode 6, the current source 7 is short-circuited via the hollow charge jet 1, so that there is a flow of electric current along the hollow charge jet. 1 By the injected electrical current into the hollow charge jet 1, the beam is interfered with dissipative effect in the beam longitudinal direction, so that the lethality of the beam is minimized in the object, which ultimately translates into a lower penetration depth in the object.

Basically, a flow of electric current along the hollow charge jet 1 can be formed only when the shaped charge jet 1 contacted by two electrode plates with different potentials, so that there is a potential balance between the two electrode plates over the hollow charge jet. Since the shaped charge jet 1 of a metallic alloy, usually, there is a high copper content, the shaped charge jet has a very good electrical conductivity, so that there is a flow of electric current along the hollow charge jet, said high currents on the order of 100 kA be achieved can.

The electric current is able to act only in the short period of time in which the shaped charge jet passes through the electrodes 4, 6 to the hollow charge jet, however. To ensure optimum current injection, it requires an adjustment of the electrical parameters related to the power supply, including the supply line.

In the embodiment shown in Figure 2 configuration, the electrodes 4, 6 are made of

Solid material, for example steel, and have carried out due to the

Weight limit in most protection orders only one

Electrode plate thickness of only a few millimeters. Only upon impingement of the beam on top of the second electrode 6, a current flow is initiated, so that a current flow form along the beam and influence on the other

may take propagation behavior of the beam. However, the jet tip of the shaped charge jet occurs due to the thinness of the second electrode 6 immediately out of it, which is why the beam tip may be disturbed only slightly in this way.

In this abuse has been made in DE 10 2005 021 348 B3 attention and made possible by the introduction of an expanded and spatially heterogeneous electrode formed an effective current injection into the hollow charge jet.

DE 40 34 401 A1 is shown in a similar electromagnetic armor consisting of two spatially separated electrodes which are connected at least with a capacitor in parallel and rechargeable. In this case, the facing object to be protected electrode is connected directly via an electrically insulating intermediate layer to the main armor of the object surface.

Furthermore armor systems are known, especially the

capable of reducing penetrating power of kinetic energy projectiles, eg. in the form of projectile or shell fragments.

Effective protection against such threats are multi-layered

Armor or multiple plate armor, including armor Beulblech-, non-explosive or partly reactive armor, or

Schott armor. Such a protective arrangement is shown in WO 2004/057262 A2 from the, at least one of electrostrictive or magnetostrictive material existing plate. By a suitable electrical

Voltage supply of the electrostrictive or magnetostrictive material, the distance between at least two armor plates can be varied.

In US 6,622,608 B1 a plate armor is described with two variable spacing plates, the mutual distance by means of electromagnetic

Repulsion forces between the plates is adjusted as required.

From DE 42 44 546 C2 is a sandwich structure like design

Protection element produced that has a coil and / or capacitor array can be accelerated by the surrounding protective plates to reduce the depth of penetration of an approaching shaped charge projectile into the structure.

Armor plate modules, which provide ballistic protection and, for example steel, light metals, plastics, tissue, air, etc., made of a composite of different layers of different materials respectively, are referred to as

Composite armor called. Such composite armor allow a significant weight reduction compared to solidly formed armored steel plates with comparable or improved protection.

In US 5,763,813 a typical composite armor is disclosed which includes a ceramic layer, which consists for example of a solidly designed plate or of elements which are assembled into a honeycomb structure. This ceramic layer is connected to a steel plate. Partly this composite receives an additional backing from a tissue layer provides further protection for pressure and splinter load.

Thus, a multi-layered armor panel is known from US 4,131,053 A, consisting of an outer hard ceramic layer, an intermediate ductile layer of z. B. beryllium and an inner third layer of a fiber-reinforced plastic. All layers are bonded by suitable adhesive to each other permanently. In EP 237 095 A a complex composite is described armor plate coated between an outer fiber reinforced plastic ceramic layer and an inner laminate of fiber-reinforced plastic layers comprising a laminate of thin metal sheets and fiber-reinforced plastic layers, and including a support plate in a honeycomb structure.

A composite armor plate as described in EP 251 395 A described has on its outer incident side a hard ceramic layer, on its inner side a laminate of a plurality of fiber-reinforced plastic layers and between them a middle layer of a plurality of metal sheets bonded together.

Summary of the invention.

The invention has for its object a device for protecting a

Object least against shaped charge jets having an electrode assembly, moving at least a first object and provides at least a second facing away from the object electrode, between which an electrical voltage is applied, to further develop such a way that in addition to protection against hollow-charge jets also an effective protection against the acting device

Kinetic energy projectiles, preferably in the form of projectiles or splinters, and Druckbzw. Blast loads should be ensured. The measures required for this should take into account the aspect of a technically simple and cost-effective implementation bill and be realized in particular with the least possible weight.

The solution of the problem underlying the invention is indicated in claim. 1 advantageously the inventive idea further developing features are subject of the dependent claims and can be seen in the further description, particularly with reference to the embodiments.

According to the solution, a device is characterized for the protection of an object

providing at least against shaped charge jets having an electrode assembly, moving at least a first object and at least one second object opposing electrode, between which an electrical voltage is applied, in such a way that, the second facing away from the object electrode is at least part of a composite armor, ie is part of a multi-layered armor that offers protection and polyvalent, for example in the form of a

Ceramic composite armor, a Beulplattenpanzerung or can be implemented as Spaced Armor.

The apparatus according to the solution thus provides a combination of a

Composite armor with an electric armor system is by

at least one electrically conductive layer within the composite armor as an integral part of the electric armor system is used. By the combination of two according to the solution previously each singly, ie separately from each other inserted, safeguards can with both

associated protective properties protective armor are used in a synergetic manner without having to take one of the two individual protections known in purchasing a significant weight gain compared to the weight. By according to the solution forming the second, facing away from the object electrode as an integral part of a composite armor is in particular a protection of the electrode assembly itself against projectile or splitter influences, particularly in the form of small caliber projectiles, and Druckbzw. Blast loads created. So can the according to the solution

Composite armor bombardment, etc. effectively trap which would eventually lead to the unhindered penetration of the second electrode at an exposed second electrode, as is the case in the prior art, whereby the mechanism of action of the electric armor against shaped charge jets would at least severely impaired.

Most protective armor and composite armor in use look to improve its penetration properties, especially against bombardment or splinters load, solid metal inserts in the form of, for example, steel plates or similar consisting of electrically conductive material

Layers from which are used in solvent manner according to the realization of an electric armor protection system. To this end, an already provided in a polyvalent protection armor massive metal insert in the form of a steel plate or the like consisting of an electrically conductive material layers may be used, or is a polyvalent armor to make accordingly so that they are used in solution manner according to the realization of an electric armored protection system can.

In one embodiment according to the solution is the object facing away from the electrode, that is the second electrode, integral part of a composite armor such that at least in the medium or another plate- or sheet-shaped material layer on the second electrode directly at least partially planar

is overlappingly attached. '

In another embodiment, the surface facing the object electrode is additionally designed as composite armor.

The composite armor can in principle with all known

Assemblages realize different layer materials, more preferably suitable for this purpose plate- or sheet-shaped material layers of at least one of the following layers of material: perforated armor plate, alloy plates consisting of magnesium, aluminum and / or

Titanium alloys as well as other suitable and known to those skilled metal alloys. Also and especially to ceramic materials for the training of ceramic armor plates are suitable, especially ceramic materials over great hardships and compressive strength 'feature. Also, reactive layers in the form of elastomer layers are suitable.

At the back, that is, facing toward the object to the second plate or sheet-shaped electrode, which is an integral part of the composite armor, fiber reinforced plastic plates and / or fabric layers may also be provided, can be intercepted by the occurring splitter. Of course, embodiments are conceivable in which in addition the medium facing the object first electrode in a composite with another plate- or sheet-shaped material layers is directly or indirectly.

Summary of the Invention

The invention is described below without limiting the general

described inventive idea with reference to embodiments with reference to the drawings. Show it:

FIG. 1a electrical armor with a side remote from the object electrode constituting an integral part of a composite armor

FIG. 1b facing away from electrical armor with the object and

facing electrode, which is an integral part of a composite armor

FIG. 2 electrical armored protection according to the prior art, and

Fig. 3 is electric plating with a side remote from the object electrode part of a Schott armor.

WAYS OF IMPLEMENTING THE INVENTION, INDUSTRIAL APPLICABILITY

1a shows schematically a sectional view through a solution designed according to the protection device for protection of an object 8, at least against the effect of a hollow charge jet 1, which is directed in the embodiment shown according to Figure 1 from left to right in the direction of the object. 8 For the protection of the object 8 basically serves a the object 8 upstream, that is without contact to the object, electric armor consisting of the electrodes 4 and 6 which are connected to each other via a pulse current source. 7 In solution the manner according to the electrode 4 in the form of a conductive plate, preferably a metal plate, integral part of a composite armor V, the electrode 4 formed of a ceramic plate 3, as explained, for example, as steel plate in the embodiment shown, and a backing layer eg. B from

Aramid fabric 5 is made. The three material layers 3,4,5 each represent an intimate face-bonded constitute and provide in the form of a composite armor V effective protection against projectiles, splinters and Blast, schematically represented by reference numeral 2. The composite armor V is designed so that breakdowns due to projectile bombardment be avoided. 2 In contrast, however, shaped charge jets one asset a composite armor V to well

pierced, however, the hollow charge jets 1 due to the initially explained mechanism in contact with the electrodes 4, 6 as shown in Figure 1a, due to the very high currents which develop in the beam direction, 6 dissipative disturbed in the area of ​​the object 8 facing electrode ,

In one embodiment, the object 8 facing first electrode 6 consists of a spatially heterogeneous shaped electrode material, preferably from an electrically conducting metal foam, such as aluminum foam, which at the passage of the shaped charge jet in contrast to a solid material, for example, such as steel, with a strong repression of the metal foam directed away from the beam axis of the shaped charge jet reacts. The result is an increased distance of the stalled heterogeneous electrode material in the radial direction to the beam axis, while the tip of the shaped charge jet penetrating deeper into the heterogeneous region of the electrode material, wherein a locomotive crater basic forms, as can be seen from Figure 1 a. In the area of ​​the crater reason the jet tip forms a good electrical contact can couple via the electric current with a large current strength in the shaped charge jet. The injected current here can contribute to the failure of the entire beam portion from the tip of the shaped charge jet to the object 8 facing away from the second electrode. Further details of the mechanism of action between the hollow charge jet 1 and the object-facing electrode 6 with a spatially heterogeneous electrode material formed of the DE is given 10 2005 021 348 B3. Studies on the example shown in Figure 1a embodiment have the particular effectiveness of the protection arrangement clearly demonstrated in the substantial reduction of the total weight. Thus, the composite armor V with a plurality of millimeter thick ceramic layer 3, a thinner steel layer 4, and a Aramidgewebebacking 5 was realized. The ceramic layer 3 here was composed of hexagonal ceramic elements which are arranged in a honeycomb structure. The first electrode 6 consisted of a heterogeneous electrically conductive structure in the order of decimeters and a rear, several mm thick

Aluminum plate 6 ', which is also arranged at a distance to the object to be protected. 8 The distance between the second electrode 4 and first electrode 6 was a few cm. Between the electrodes 4, 6 was measured using a

High voltage capacitor 7, a voltage in the order of 10 kV applied. It could be shown that, for carrying out a bombardment of the electrode assembly was disintegrated effectively with a hollow-charge jet of the jet. In addition, it could be shown in further individual tests that the front assembly at bombardment, splitter and Blast load of a particular class was not perforated.

Of course, the layer structure may be that illustrated in Figure 1a

Composite armor V are carried out in a different form. For example. may have different layers of material and / or multiple metal layers by means of suitable spacers spaced from each other in a

Sandwich structure be arranged to form a composite armor. The skilled person for this purpose are all known it is taking to form a polyvalent protective arrangement.

Figure 1 b illustrates an embodiment in which in addition to the already explained in figure 1 a composite armor V to the object 8 facing electrode 6 is part of a further composite armor V. Also in this case is a

High-voltage source 7 connected to the electrodes 4 and 6. FIG. The composite armor V is preferably constructed as it were, in the above described manner as that explained composite armor V.

3 shows another solution according to exemplary embodiment is illustrated in which the object 8 facing away from the electrode 4, in the form of a steel plate is an integral part of a so-called Schott armor that illustrated in the

Embodiment provides an additional armor plate 9 which is opposite to the

Electrode plate 4 facing away from the object at a certain distance from the

Electrode plate 4 is arranged. In the same manner as that described in Figure 1a polyvalent armored protection also realized by an armor plate 9 and the electrode plate 4 Schott armor acting projectile, splitter and blast loads with respect to the downstream in the direction of action space between electrode can 4 and 6 almost completely trap. Nevertheless, shaped charge jets 1 are able to penetrate the armor Schott. However, these are due to the voltage applied between the electrodes 4 and 6

High voltage by the high voltage source 7 in the manner explained dissipative disturbed in order to ultimately provide an effective physical protection.

Optionally, also may be provided on the rear side of the object 8 facing the electrode 6, a composite armor V, which in turn from a

Multi-layer arrangement is respectively composed of different material layers, such as for example, steel plate, the ceramic layer, the honeycomb backing and fabric layer.

Basically, can be a variety of other combinations of a polyvalent protection armor and an electric armor system introduced, in which the respective faces away from the object disposed electrode can be regarded as an integral part of the respective composite armor. LIST OF REFERENCE NUMBERS

One shaped charge jet

Projectile, shrapnel fire, blast effects

3 ceramic layer

4 to the object facing away from the second electrode

5 fabric layer

6 The object facing first electrode 6 'aluminum plate

7 Pulse power source

8 object

V, V composite armor

9 armor plate

Claims

claims
1. A device for protecting an object against at least
Hollow charge jets with an electrode arrangement, at least a first moving the object and provides at least a second facing away from the object electrode, between which an electrical voltage is applied,
characterized in that the second facing away from the object electrode is at least part of a composite armor.
2. Device according to claim 1,
characterized in that the first of the electrode part of another
is composite armor.
3. Device according to claim 1 or 2,
characterized in that at least the second electrode is formed plate- or sheet-shaped, and
that at least one further plate-like or sheet-shaped material layer on the second plate or sheet-shaped electrode in the medium or is disposed directly at least partially overlapping area.
4. Apparatus according to claim 3,
characterized in that represent at least one further plate-like or sheet-type material layer and the second electrode is a Schott armor.
5. Apparatus according to claim 3 or 4,
characterized in that the at least one further plate-like or sheet-type material layer of at least one of the following
is selected material layers: perforated armor plate, alloy plate consisting of magnesium, aluminum and / or titanium alloy, ceramic armor plate reactive layer, fiber reinforced sheet of plastic, fabric layer.
6. Device according to one of claims 1 to 5,
characterized in that the surface facing the object electrode has at least one region with a spatially heterogeneous electrode material formed.
7. Device according to one of claims 1 to 6,
characterized in that for generating an electric voltage between the at least two electrodes, a pulse current source is preferably provided in the form of a high voltage capacitor.
8. Device according to one of claims 1 to 7,
characterized in that the first object facing the electrode is spaced to the object and limited on both sides with the object, an air layer.
9. Device according to one of claims 1 to 8,
characterized, in that
that is disposed on the applied to the object side of the second electrode at least one further plate-like or sheet-shaped material layer on the second plate or sheet-shaped electrode.
PCT/EP2011/002225 2010-05-05 2011-05-04 Device for protecting an object at least from shaped charge jets WO2011138025A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102010019475.1 2010-05-05
DE201010019475 DE102010019475A1 (en) 2010-05-05 2010-05-05 A device for protecting an object against shaped charge jets at least

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WO (1) WO2011138025A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9897418B2 (en) 2014-06-02 2018-02-20 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Electric reactive armour

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US5763813A (en) 1996-08-26 1998-06-09 Kibbutz Kfar Etzion Composite armor panel
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Publication number Priority date Publication date Assignee Title
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