EP1698850A1 - Struktur eines elektrischen Panzermoduls - Google Patents

Struktur eines elektrischen Panzermoduls Download PDF

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Publication number
EP1698850A1
EP1698850A1 EP06110530A EP06110530A EP1698850A1 EP 1698850 A1 EP1698850 A1 EP 1698850A1 EP 06110530 A EP06110530 A EP 06110530A EP 06110530 A EP06110530 A EP 06110530A EP 1698850 A1 EP1698850 A1 EP 1698850A1
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EP
European Patent Office
Prior art keywords
wall
jet
module according
module
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06110530A
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English (en)
French (fr)
Inventor
Thierry Bouet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDA Armements SAS
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TDA Armements SAS
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Filing date
Publication date
Application filed by TDA Armements SAS filed Critical TDA Armements SAS
Publication of EP1698850A1 publication Critical patent/EP1698850A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/007—Reactive armour; Dynamic armour

Definitions

  • the invention relates to the field of the protection of structures such as land-based buildings, vehicles or even ships, against attacks operated by means of hollow charges. It applies in particular to the protection of armored vehicles.
  • a hollow charge is, in known manner, the destructive part of a projectile for the perforation of shielding elements.
  • This hollow charge has several elements.
  • the assembly is packaged in an envelope 11 closed at one of its ends by the part 15, called coating, intended to penetrate the armor attacked.
  • the coating 15, generally of substantially conical shape, is made of metal such as copper for example.
  • the coating 15 acquires a very important kinetic energy is driven by a very large and very fast expansion. Under the effect of this very important deformation it takes the form illustrated in Figure 2.
  • the coating then comprises two parts, a rear portion 21 called core and a front portion 22 called jet.
  • the jet represents the perforating part of the load. Its dimensions and in particular the length are expanding according to a speed gradient, the tip of the jet 18 being propelled at a speed close to 8000 m / s, the tail of the jet 19 having a speed of about 3000 m / s.
  • the core 16 is propelled at a speed close to 1000 m / s.
  • the jet 22 is a long rod of molten metal, with a diameter of about 2 mm, whose surface has, as shown by the enlargement, a slightly ringed appearance with bulges 26 and nips 25.
  • the core tends to take a flattened shape whose dimensions, important in relation to the diameter of the jet that it does not participate in almost the perforation.
  • the jet Due to the kinetic energy it possesses, the jet is capable of penetrating a metal shield several decimetres thick.
  • An effective inert protection against the projectiles equipped with hollow charge therefore consists of increasing the thickness of the shielding and is thus very penalizing in terms of weight.
  • the protective structure used essentially consists of two metal plates placed on the surface to be protected and constituting two electrodes connected to a battery of charged capacitors which apply a very high voltage between the two plates.
  • the hollow charge jet When the hollow charge jet develops, it bypasses the two electrodes and a very intense current is gradually established in the metal jet. This current has the effect of heating the jet until vaporization. To ensure total effectiveness, it is necessary that the destruction of the jet takes place during its passage between the two electrodes. The elements of the jet having crossed without damage the space between the two plates are no longer subject to electric current and are therefore no longer likely to be destroyed. This is especially true for the beginning of the throw. They can therefore cause damage, the protection being partially ineffective. Knowing that the jet penetrates the structure at very high speed, it is easy to see that the success of the destruction of the jet depends on the energy provided by joule effect and the time taken to bring this energy to the jet.
  • This energy is in practice proportional to the square of the intensity of the current and the duration of the passage between the two electrodes.
  • the maximum current is not established because of parasitic inductive elements present in the circuit constituted by the plates and the jet.
  • the intensity of the current then flowing in the jet is low so that the jet head is not destroyed.
  • the principle known from the prior art does not ensure complete destruction of the load and leaves intact the most energetic part that can perform its function of perforation without encountering a complete obstacle.
  • a number of solutions have been considered.
  • the goal is to allow a current to flow in the head of the jet after it has left the space between the plates.
  • a first solution envisaged is to install a solid metal structure behind the ground electrode and electrically connected thereto.
  • the disadvantage of such a solution is the weight of the structure thus formed, not very compatible for example with a mobile structure of the armored vehicle type.
  • FIG. 4 Another solution illustrated in FIG. 4 consists in leaning against the inner plate a structure made of metal plates arranged in parallel planes perpendicular to the plane of the plate.
  • This architecture lighter than that described above makes it possible to circulate a current in the head of the jet after it has left the space between the two plates.
  • its effectiveness depends on the orientation of the jet relative to the plane defined by the plates and the spacing of the plates relative to each other.
  • the intensity of the current established between the jet head and one or the other plate is a function of this spacing as well as the diameter of the jet and the position of the jet relative to one or the other plate .
  • the subject of the invention is a module for producing a light and mobile reactive shield comprising at least one external wall and an electrically conductive inner wall and forming two electrodes between which a very high voltage is applied, said walls defining an inter-electrode gap, as well as a three-dimensional internal structure of low density, electrically conductive and in electrical contact with the inner wall.
  • the module according to the invention is intended to be placed between the object to be protected and the hollow charge, the internal three-dimensional mechanical structure being positioned between the electrodes and the object to be protected.
  • the internal mechanical structure is produced by means of a plurality of superimposed corrugated conductive sheets, each sheet being separated from the neighboring sheets by a space of given thickness and having a side electrically connected to the intermediate wall.
  • the axis of the corrugations being parallel to the plane defined by said intermediate wall.
  • the planes formed by each of the corrugated conductive sheets intersect the plane formed by the intermediate wall at right angles or at an angle ⁇ less than ⁇ / 2.
  • the internal mechanical structure comprises two juxtaposed structures each structure is made by means of a plurality of superimposed corrugated conductive sheets, each sheet being separated from the neighboring sheets by a space of given thickness and having a connected side electrically to the inner wall, the axis of the corrugations being parallel to the plane defined by said inner wall, the planes formed by each of the corrugated conductive sheets intersect the plane formed by the inner wall at an angle ⁇ 1 less than ⁇ / 2 for the first structure and an angle ⁇ 2 greater than ⁇ / 2 for the second structure.
  • the internal mechanical structure takes the form of a honeycomb structure, electrically connected to the inner wall, comprising a plurality of cellular ducts, the axis of each alveolar duct intersecting the defined plane. by the inner wall at an angle ⁇ .
  • ⁇ is arbitrary, or ⁇ is different from ⁇ / 2
  • the internal mechanical structure is made by means of a wool consisting of fibers of electrically conductive material, electrically connected to the inner wall.
  • the internal mechanical structure is made by means of a foam of electrically conductive material, electrically connected to the inner wall.
  • the invention also relates to a protection device against hollow charges comprising module elements as claimed.
  • FIG. 1 shows schematically the structure of a hollow charge at rest.
  • This load consists of a body 11, substantially cylindrical, for example, containing an explosive 12.
  • a priming device 13 At one of its ends is placed a priming device 13 and an inner member 14, or mask, intended to conform the detonation wave created by the primer.
  • the body of the load At the opposite end, the body of the load is closed by an element 15 of substantially conical shape, called coating.
  • the coating is generally made of metal, copper for example. It constitutes a cone whose base has a diameter of the order of one decimetre and whose wall has a thickness of the order of mm.
  • Figure 2 shows schematically the appearance and structure of the load after firing.
  • the firing is performed by triggering the priming device 13 which generates a detonation wave exploding the explosive 12 contained in the body 11 of the load.
  • the coating 15 is expelled with a very high kinetic energy.
  • the propulsion of the coating is accompanied by a deformation of said coating which takes the form illustrated in FIG. then presents as an elongated object, subject to a gradient of speed causing it to stretch with increasing time.
  • the thus deformed coating thus constitutes a perforating projectile consisting of two parts.
  • the first part 21 constitutes what is called the nucleus.
  • the second part 22 called jet is the piercing part of the projectile, that intended to penetrate the armor of the attacked structure, an armored vehicle for example.
  • the jet is a long metal rod with a diameter d equal to a few mm and a length of the order of one meter. It comprises a free end 23, or head, and an end connected to the core 24.
  • the entire projectile is subjected to a high velocity gradient: from 8000 m / s for the head of the jet to 3000 m / s for the end in contact with the nucleus for example, the nucleus moving with a speed of the order of 1000 m / s.
  • the head of the jet moving at a speed greater than that of the core jet is subjected to an elongation.
  • the kinematics followed by the entire projectile makes the surface of the jet show a wavy appearance, made of constrictions 25 and bulges 26.
  • the action of such a projectile against a shield is mainly related to the very important kinetic energy available to the projectile. So that, even having a diameter and a low mass, the projectile of the hollow charge has a very important perforating power. Because of its very high speed it is also very difficult to neutralize.
  • FIG. 3 illustrates a general protection principle known from the prior art, intended to try to neutralize a hollow charge projectile in time.
  • This principle consists in setting up in front of the partition of the object to be protected a module comprising two electrically conducting walls 31 and 32, separated by a void space 33, the two walls being subjected to a very high potential difference at the medium of a high power supply.
  • the direction of polarity is here indifferent and is indicated arbitrarily in FIG.
  • FIG. 4 illustrates a means known from the prior art for improving the known principle illustrated in FIG. 3. As this figure shows, this improvement consists in adding to the electrode system described.
  • FIG. 3 shows a structure 41 of width D consisting of superimposed electrically conductive plates 42 of small thickness spaced a distance apart from each other. This structure 41 is applied to the face of the inner wall which is not facing the intermediate space 33 and is in electrical contact with this wall. The spacing d between the plates is chosen so as to promote the passage of an electric current by potential discharge between the adjacent plates of the jet and the jet itself.
  • the scale ratio between the jet and the size I of the spacing between plates is voluntarily not respected.
  • the improvement illustrated in Figure 4 is an improvement of the principle illustrated in Figure 3, because it allows to maintain the passage of an electric current in the head of the jet while it has already perforated the inner wall 32. It allows thus to increase the destruction of the jet by melting and vaporization during the crossing of the structure 41.
  • tests conducted elsewhere have shown a significant variation in the efficiency of such a structure according to the relative positioning of the jet compared to the plates. The optimization of the structure is therefore difficult and conducted if one seeks a complete protection to a heavy and bulky system.
  • FIG. 5 very generally presents the structure of the module according to the invention.
  • the module according to the invention mainly comprises two conductive walls, an outer wall 51 and an inner wall 52, defining an intermediate space 53.
  • the module also comprises a conductive internal structure 54, energy absorption, applied against the wall 52 three-dimensional and electrically connected to this wall.
  • the internal structure 54 is a three-dimensional light structure. Between the two walls 51 and 52 is applied a very high voltage by means of a high power supply 55, the two walls thus forming two electrodes.
  • the three-dimensional structure 54 according to the invention advantageously makes it possible to eliminate the drawback of the modules known from the prior art and illustrated in FIG. 4.
  • a multi-plane structure such as that of FIG. three-dimensional to ensure a quasi-continuous electrical interaction with the head of the hollow charge jet 35 during its penetration into the structure 54, and this regardless of the direction of penetration of the projectile in the module. This prolongs the action of the destruction current of the jet. Its use therefore makes it possible to optimize the overall thickness and the weight of the module according to the invention.
  • this structure can be easily adaptable to one or more types of predetermined hollow charges.
  • the value of the amplitude a of the undulation is chosen so that the ratio between the spacing p and the amplitude an interaction between the jet and the neighboring plates on the greatest number of points, so as to ensure a substantially continuous current flow. This condition is advantageously sufficient to ensure the destruction of the jet head before its complete traverse of the structure 61, and this, regardless of the angle at which the hollow charge collides with the module.
  • the spacing T between two corrugations is chosen from the order of magnitude of the natural waving period ⁇ of a hollow charge jet free of any interaction. ⁇ is typically of the order of a few mm. It should be noted that for purposes of clarity of the figure, the relative dimensions of the plates 62 and the jet 34 are deliberately not represented on the same scale, the plate dimensions 62 being voluntarily magnified.
  • the structure shown in FIG. 6 thus represents a simple embodiment of a three-dimensional structure capable of ensuring maximum electrical interaction between the hollow charge jet and the structure. Compared with the known solutions of the prior art, it has the advantage of an increase in efficiency obtained at low cost by means of a relatively simple and light structure.
  • FIG. 7 shows a variant of the embodiment of the three-dimensional structure of FIG. 6.
  • the corrugated plates 72 are arranged in parallel planes having, with the plane of the wall 52, an angle ⁇ substantially different from ⁇ / 2.
  • This variant of the previous embodiment makes it possible in particular to increase, according to the penetration angle of the hollow charge jet in the module, the number of interaction between the jet head 35 and the plates 72. create, by choosing a particular angle ⁇ , a structure 72 adapted to a given type of threat.
  • FIG. 8 presents a more complex variant of the embodiment of the three-dimensional structure of FIG. 6.
  • This variant consists in juxtaposing two corrugated structures similar to the structure 71 of FIG. 7, the two structures 81 and 83 possibly being able, for ease of embodiment, to be separated by a conducting partition 85.
  • the assembly of the two structures being disposed against the wall 52 and electrically connected thereto.
  • the planes in which the plates of the structure 81 are arranged have, with the plane of the wall 52, an angle ⁇ 1 substantially different from ⁇ / 2
  • the planes in which the plates of the structure 83 are arranged have with the plane of the wall 52 an angle ⁇ 2 different from ⁇ 1, also substantially different from ⁇ / 2.
  • a structure can be formed for which ⁇ 1 and ⁇ 2 are complementary.
  • Such a structure of more complex construction than the structures of FIGS. 6 and 7, has the advantage of remaining a light structure and of offering a broader protection as regards the envisaged projectile range and their arrival directions.
  • FIG. 9 shows, for example, another embodiment implementing a volume structure comprising a set of conductive blades 91 arranged in a "honeycomb" type arrangement, the axis 92 of the cells forming with the plane 93 of the wall 52 at any angle ⁇ , defined in particular according to the threat considered.
  • the angle ⁇ may for example be equal to ⁇ / 2.
  • the set of embodiments presented in the preceding paragraphs has the characteristic of adding a light three-dimensional structure to the known module of the prior art.
  • the three-dimensional structure makes it possible to effectively solve the problem of the passage of the module coating through the head of the hollow charge jet, traversed subsequent to the time required to establish the destruction current of the jet 34. It is therefore of course possible to consider other embodiments of this three-dimensional structure such as the structure of a wool consisting of fibers of electrically conductive material or the structure of a foam of electrically conductive material.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP06110530A 2005-03-04 2006-02-28 Struktur eines elektrischen Panzermoduls Withdrawn EP1698850A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0502210A FR2882813B1 (fr) 2005-03-04 2005-03-04 Structure de module pour blindage electrique

Publications (1)

Publication Number Publication Date
EP1698850A1 true EP1698850A1 (de) 2006-09-06

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EP06110530A Withdrawn EP1698850A1 (de) 2005-03-04 2006-02-28 Struktur eines elektrischen Panzermoduls

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US (1) US7661350B2 (de)
EP (1) EP1698850A1 (de)
FR (1) FR2882813B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9346427B2 (en) 2012-06-06 2016-05-24 Tencate Advanced Armor Usa, Inc. Active countermeasures systems and methods

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946211B1 (en) * 2004-04-23 2011-05-24 The United States Of America As Represented By The Secretary Of The Navy Electrical and elastomeric disruption of high-velocity projectiles
DE102005021348B3 (de) * 2005-05-04 2006-12-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schutzmodul zum Schutz von Objekten mit elektrischem Strom gegen Bedrohungen, insbesondere durch Hohlladungen
US7819050B1 (en) * 2005-08-18 2010-10-26 General Atomics Active armor system
WO2010082970A2 (en) * 2008-10-23 2010-07-22 University Of Virginia Patent Foundation Reactive topologically controlled armors for protection and related method
DE102009038630A1 (de) * 2009-08-26 2011-04-28 Rheinmetall Waffe Munition Gmbh Schutzmodul für ein Objekt gegen insbesondere Hohlladungsgeschosse
KR101396901B1 (ko) 2012-06-07 2014-05-20 국방과학연구소 액체 금속 제트의 와해 성능을 개선한 전기 장갑 장치
NL2012932B1 (en) 2014-06-02 2016-06-16 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Electric reactive Armour.
KR101555920B1 (ko) 2015-07-10 2015-09-30 국방과학연구소 전기 장갑 및 이를 구비하는 방호 시스템

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034401A1 (de) * 1990-10-29 1992-04-30 Deutsch Franz Forsch Inst Elektromagnetische panzerung
DE4244546A1 (de) * 1992-12-30 1998-05-14 Deutsch Franz Forsch Inst Elektromagnetisches Sandwich
DE3715807C1 (de) * 1987-05-12 1998-12-03 Deutsch Franz Forsch Inst Schutzeinrichtung
SE522191C2 (sv) 2000-09-13 2004-01-20 Foersvarets Forskningsanstalt Elektromagnetiskt pansar
US20040118273A1 (en) * 2002-12-18 2004-06-24 Zank Paul A. Active armor including medial layer for producing an electrical or magnetic field

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU49672A1 (de) * 1965-03-23 1967-04-21
FR2721857B1 (fr) * 1994-06-30 1996-09-06 Saint Gobain Vitrage Vitrage equipe d'un circuit de protection electrostatique
FR2735567B1 (fr) * 1995-06-13 1997-07-25 Tda Armements Sas Tete militaire, notamment a charge generatrice de noyau
FR2793106B1 (fr) * 1999-04-28 2001-06-22 Saint Gobain Vitrage Vitrage multiple isolant, en particulier hublot d'avion, a blindage electromagnetique
US7104178B1 (en) * 2002-12-18 2006-09-12 Bae Systems Information And Electronic Systems Integration Inc. Active armor including medial layer for producing an electrical or magnetic field

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715807C1 (de) * 1987-05-12 1998-12-03 Deutsch Franz Forsch Inst Schutzeinrichtung
DE4034401A1 (de) * 1990-10-29 1992-04-30 Deutsch Franz Forsch Inst Elektromagnetische panzerung
DE4244546A1 (de) * 1992-12-30 1998-05-14 Deutsch Franz Forsch Inst Elektromagnetisches Sandwich
SE522191C2 (sv) 2000-09-13 2004-01-20 Foersvarets Forskningsanstalt Elektromagnetiskt pansar
US20040118273A1 (en) * 2002-12-18 2004-06-24 Zank Paul A. Active armor including medial layer for producing an electrical or magnetic field

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9346427B2 (en) 2012-06-06 2016-05-24 Tencate Advanced Armor Usa, Inc. Active countermeasures systems and methods

Also Published As

Publication number Publication date
FR2882813A1 (fr) 2006-09-08
FR2882813B1 (fr) 2007-05-11
US7661350B2 (en) 2010-02-16
US20060196350A1 (en) 2006-09-07

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