EP1000312B1 - Countermeasure ammunition - Google Patents

Countermeasure ammunition Download PDF

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Publication number
EP1000312B1
EP1000312B1 EP99922246A EP99922246A EP1000312B1 EP 1000312 B1 EP1000312 B1 EP 1000312B1 EP 99922246 A EP99922246 A EP 99922246A EP 99922246 A EP99922246 A EP 99922246A EP 1000312 B1 EP1000312 B1 EP 1000312B1
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EP
European Patent Office
Prior art keywords
hollow
charges
munition according
charge
hollow charges
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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.)
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EP99922246A
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German (de)
French (fr)
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EP1000312A1 (en
Inventor
Joel Thomson-CSF-Propriété Intellectuelle FERRON
J.P. Thomson-CSF Propriété Intellectuelle GUILLON
C. Thomson-CSF Propriété Intellectuelle PERTHUIS
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TDA Armements SAS
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TDA Armements SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/16—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
    • F42B12/18—Hollow charges in tandem arrangement

Definitions

  • the invention relates to the field of countermeasures ammunition, in particular but not exclusively munitions intended for the destruction or neutralization of weapons containing very few explosives sensitive such as underwater mines.
  • Such ammunition can be torpedoes, underwater vehicles, guided or autonomous, ammunition installed directly by deminers or more generally demining systems.
  • SEAFOX An example of such a demining system is known as designation of SEAFOX.
  • This system consists of an underwater vehicle wire guide which will be placed near the mine. It carries a load hollow which by its capacity of perforation will, with its jet, cross the mine. This aggression is generally likely to render the mine inoperative. This is a first level of efficiency, but we know that mine hunters wish to see disappear the sonar echo of the mine, which means a burst into small pieces. Such an effect is obtained when the throw of the shaped charge has the capacity when it enters the load explosive from the mine, creating a shock with sufficient energy to cause the almost immediate detonation of it.
  • the invention relates to a counter ammunition measurement comprising a lethal system having an axis of attack, characterized in what it comprises at least three hollow charges including the longitudinal axes are concurrent and evenly distributed angularly around the axis of attack, each shaped charge being intended to produce a jet of shaped charge acting concomitantly in an area of a target, the area being defined by the intersection with the target of the cone containing the concurrent axes of shaped charges and centered on the axis of attack.
  • the invention also relates to a use of ammunition as an underwater vehicle for the destruction of submerged mines.
  • the ammunition is placed in attack position in front of a mooring mine 1.
  • Mooring mine 1 is kept immersed in water by a rope 2 attached to a toad or base 3.
  • a shell 4 often made of steel, constitutes the float of the mine and inside, a tank 5 contains the explosive charge 6.
  • the mine also includes detection means 7 connected to a setting device fire 8.
  • the ammunition which bears the reference 9 in the figure la consists a vehicle 10 and a lethal system in the form of a shaped charge comprising a coating 11, an explosive charge 12, a containment side 13, a safety and ignition system 14.
  • a dead volume 15 is generally necessary for the proper functioning of the shaped charge.
  • the ammunition 9 can operate the shaped charge without being in contact with the mine.
  • FIG. 1b The ignition of the hollow charge provokes in a diagrammatic manner in FIG. 1b, the explosion of the explosive charge 12 which transforms the coating 11 into a jet 16 animated with a speed of several km / s. This speed allows the jet to hydrodynamically pass through the steel walls of the shell 4 and of the tank 5 to reach the explosive charge 6.
  • the jet 16 by creating a crater in the explosive charge 6 of the mine 1 generates a shock wave which develops zone 17 under very strong pressure. If the pressure in zone 17 is high enough over a sufficient surface, the criterion V 2 d is satisfied and the explosive charge 6 is detonated which pulverizes the mine 1.
  • FIGS. 2a and 2b where the elements homologous to those of FIG.
  • the lethal system is composed of three hollow charges 18a, 18b, 18c evenly distributed around the axis of attack (OO ') of the lethal system.
  • These hollow charges are arranged in the directions of three planes at 120 ° and their longitudinal axes X'X, are concurrent forward at a point ⁇ of the axis OO 'whose adjustment is predetermined according to the distance d ammunition attack.
  • the three hollow charges are identical, they are constituted in a similar manner to that shown in FIG. 1a, of a coating 11, of an explosive charge 12, of a confinement 13 and of a system of simultaneous firing 19 of the three shaped charges.
  • the coating 11 is for example made of copper, but other types of material such as aluminum or synthetic products (teflon, etc.) or liquid products (water, etc.) are of interest for the application. It is important that the firing system 19 guarantees good simultaneous operation of the hollow charges to allow the effects sought by the invention as described.
  • the firing system 19 can be a known electronic device which simultaneously initiates three detonator primers with a projected layer 20.
  • Another embodiment can consist of a pyrotechnic distributor which, starting from a single detonator, goes simultaneously propagate the detonation towards the hollow charges.
  • Figure 2c shows after the explosion of the shaped charges 18a, 18b, 18c, the interaction of the jets 16 on the mine explosive.
  • Each of the jets develops around the crater it creates, a zone 17 of overpressure, the zone 17 being defined by the intersection with the target 14 of the cone containing the concurrent axes XX 'of the hollow charges and centered on the axis of attack 00 '.
  • the zones of overpressure by joining together confine each other and create a surface, subjected to a significant pressure, greater than the sum of the three individual surfaces.
  • FIGs 3a and 3b where elements homologous to those of Figures 2a and 2b are shown with the same references, represent a second embodiment of the lethal system according to the invention.
  • the shaped charges are placed one behind the other slightly offset in 3 planes 120 ° and their axes of revolution X'X are concurrent at a point ⁇ , located at the front of the system, the position of which is predetermined according to the ammunition attack conditions.
  • the ignition system 19 controls the initiator of the detonating primers with projected layers 20 of each shaped charge according to a chronology such as the heads of the jets, preferably constant velocity, simultaneously attacks the explosive charge of the mine.
  • the firing systems 19 of each of the shaped charges can be advantageously replaced by a unique firing system produced in the form of the synchronous pyrotechnic distributor shown in Figures 4a and 4b.
  • This comprises an input pyrotechnic relay 21 which is put in communication with each of the explosive charges by relay 22 through conduits 23.
  • relay 21 is initialized by a primer, the detonation produced propagates through a pyrotechnic network formed by the conduits 23 into which is injected by example an explosive with thermosetting binder.
  • These have a length which is determined to maintain a symmetry of the paths of the detonation waves and result in a simultaneous emergence of the detonation at relay output 22.

Description

L'invention se situe dans le domaine des munitions de contre-mesure, en particulier mais non exclusivement les munitions destinées à la destruction ou la neutralisation d'armes contenant des explosifs très peu sensibles telles que des mines sous-marines. De telles munitions peuvent être des torpilles, des véhicules sous-marins, filoguidés ou autonomes, des munitions installées directement par les démineurs ou plus généralement des systèmes de déminage.The invention relates to the field of countermeasures ammunition, in particular but not exclusively munitions intended for the destruction or neutralization of weapons containing very few explosives sensitive such as underwater mines. Such ammunition can be torpedoes, underwater vehicles, guided or autonomous, ammunition installed directly by deminers or more generally demining systems.

Un exemple de tel système de déminage est connu sous la désignation de SEAFOX. Ce système est constitué d'un véhicule sous-marin filoguidé qui va se placer à proximité de la mine. Il transporte une charge creuse qui par sa capacité de perforation va, avec son jet, traverser la mine. Cette agression est généralement de nature à rendre la mine inopérante. C'est un premier niveau d'efficacité, mais on sait que les chasseurs de mines souhaitent voir disparaítre l'écho sonar de la mine, ce qui signifie un éclatement en petits morceaux. Un tel effet est obtenu lorsque le jet de la charge creuse a la capacité lors de sa pénétration dans le chargement explosif de la mine, de créer un choc dont l'énergie est suffisante pour entraíner la détonation quasi-immédiate de celui-ci.An example of such a demining system is known as designation of SEAFOX. This system consists of an underwater vehicle wire guide which will be placed near the mine. It carries a load hollow which by its capacity of perforation will, with its jet, cross the mine. This aggression is generally likely to render the mine inoperative. This is a first level of efficiency, but we know that mine hunters wish to see disappear the sonar echo of the mine, which means a burst into small pieces. Such an effect is obtained when the throw of the shaped charge has the capacity when it enters the load explosive from the mine, creating a shock with sufficient energy to cause the almost immediate detonation of it.

On sait que la capacité de ce type de munition à détruire une cible par entraínement en détonation de l'explosif qu'elle contient peut être caractérisée par un critère énergétique V2d, dit de HELD, où V représente la vitesse du jet au contact de l'explosif et d son diamètre. Cette capacité sera atteinte lorsque le critère sera supérieur à une valeur seuil qui dépend notamment de l'explosif de la cible.We know that the capacity of this type of ammunition to destroy a target by detonation training of the explosive it contains can be characterized by an energy criterion V 2 d, called HELD, where V represents the speed of the jet on contact of the explosive and its diameter. This capacity will be reached when the criterion is greater than a threshold value which depends in particular on the target's explosive.

L'emploi d'explosifs de moins en moins sensibles dans les mines considérées comme cibles, nécessite, pour obtenir leur destruction par détonation d'atteindre des valeurs de critère de plus en plus élevées, ce qui peut s'obtenir en augmentant les valeurs des deux paramètres V et d.The use of less and less sensitive explosives in mines considered as targets, requires, to obtain their destruction by detonation to reach higher and higher criteria values, which can be obtained by increasing the values of the two parameters V and d.

Il doit être noté ici avant la suite de l'exposé que l'emploi d'une charge creuse unique comme indiqué dans l'art antérieur peut permettre une destruction complète de la cible pour les modèles les plus vulnérables d'entre elles. Toutefois en fonction de l'explosif de chargement de la cible, il ne sera pas possible d'atteindre la valeur seuil du critère, même après optimisation de la charge creuse car pour des raisons physiques la vitesse du jet est limitée et son diamètre est proportionnel au calibre de la charge creuse.It should be noted here before the rest of the presentation that the use of a single shaped charge as indicated in the prior art can allow a complete destruction of the target for the most vulnerable models between them. However depending on the explosive loading the target, it will not be possible to reach the threshold value of the criterion, even after optimization of the shaped charge because for physical reasons the speed jet size is limited and its diameter is proportional to the size of the load dig.

La présente invention a pour but d'augmenter à volume constant l'efficacité d'une munition de contre-mesure. Elle a pour but en particulier :

  • soit de réduire le volume consacré à la charge pour un type de cible donné,
  • soit d'augmenter à volume constant l'agression V2d sur l'explosif de la cible, afin de l'entraíner en détonation, même lorsqu'il est d'un type peu vulnérable.
The object of the present invention is to increase the efficiency of a countermeasure munition at constant volume. It aims in particular:
  • either to reduce the volume devoted to the load for a given type of target,
  • or to increase at constant volume the aggression V 2 d on the target's explosive, in order to cause it to detonate, even when it is of a slightly vulnerable type.

A toutes ces fins, l'invention a pour objet une munition de contre mesure comportant un système létal ayant un axe d'attaque, caractérisé en ce qu'il comporte au moins trois charges creuses dont les axes longitudinaux sont concourants et équirépartis angulairement autour de l'axe d'attaque, chaque charge creuse étant destinée à produire un jet de charge creuse agissant concomitamment dans une zone d'une cible, la zone étant définie par l'intersection avec la cible du cône contenant les axes concourants des charges creuses et centré sur l'axe d'attaque.For all these purposes, the invention relates to a counter ammunition measurement comprising a lethal system having an axis of attack, characterized in what it comprises at least three hollow charges including the longitudinal axes are concurrent and evenly distributed angularly around the axis of attack, each shaped charge being intended to produce a jet of shaped charge acting concomitantly in an area of a target, the area being defined by the intersection with the target of the cone containing the concurrent axes of shaped charges and centered on the axis of attack.

L'invention a également pour objet une utilisation de la munition comme véhicule sous marin pour la destruction de mines immergées.The invention also relates to a use of ammunition as an underwater vehicle for the destruction of submerged mines.

L'action simultanée des jets de ces charges creuses est destinée à provoquer :

  • une perforation des structures et enveloppes de la cible après franchissement du milieu séparant la munition de la cible à l'instant du fonctionnement, à titre d'exemple le milieu peut être de l'eau,
  • une agression importante du chargement explosif de la cible du fait de la combinaison des effets des ondes de chocs pendant la pénétration. Ces jets doivent être concourants pour que leurs effets soient cumulatifs sur une grande surface.
  • la satisfaction du critère V2d pour obtenir la destruction par détonation des explosifs de la cible. Lorsque ces explosifs sont peu vulnérables et par conséquent ont des diamètres critiques importants, l'augmentation du critère par le facteur V ne vaut que si d est supérieur à une valeur minimale fonction de l'explosif. Cette valeur est difficilement atteignable avec une seule charge creuse sans aboutir à un calibre de charge prohibitif.
The simultaneous action of the jets of these hollow charges is intended to cause:
  • a perforation of the structures and envelopes of the target after crossing the medium separating the ammunition from the target at the time of operation, for example the medium may be water,
  • a significant attack on the explosive charge of the target due to the combination of the effects of shock waves during penetration. These jets must be concurrent so that their effects are cumulative over a large area.
  • satisfaction of criterion V 2 d to obtain the destruction by detonation of the target's explosives. When these explosives are not very vulnerable and therefore have large critical diameters, the increase in the criterion by factor V is only valid if d is greater than a minimum value depending on the explosive. This value is difficult to achieve with a single hollow charge without resulting in a prohibitive charge rating.

Ce sont ces effets qui permettent à volume égal de répartir l'énergie sur plus grande surface et de favoriser la détonation des explosifs peu sensibles.These are the effects that allow equal volume to distribute energy over larger area and promote detonation of explosives not very sensitive.

D'autres avantages et particularités de réalisation de l'invention apparaítront au cours de la description détaillée qui va suivre de plusieurs exemples de réalisation de l'invention. Ces exemples sont décrits en référence aux dessins annexés dans lesquels :

  • la figure la représente une vue en coupe d'une munition de type véhicule sous marin suivant l'art antérieur, équipé d'un système létal à une seule charge creuse en position d'attaque vis à vis d'une mine à orin.
  • la figure 1b est une vue en coupe, du mode d'action du jet de la charge creuse de la munition représentée à la figure 1a sur l'explosif d'une mine.
  • les figures 2a et 2b un premier mode de réalisation d'une munition à multi-charges creuses selon l'invention.
  • la figure 2c une vue en coupe du mode d'action des jets des charges creuses de la munition représentée aux figures 2a et 2b.
  • les figures 3a et 3b un deuxième mode de réalisation d'une munition à multi-charges creuses selon l'invention.
  • les figures 4a et 4b un mode de réalisation d'un distributeur pyrotechnique synchrone utilisable pour la mise à feu du mode de réalisation des figures 2a et 2b.
Other advantages and particularities of embodiment of the invention will become apparent during the detailed description which follows of several examples of embodiment of the invention. These examples are described with reference to the accompanying drawings in which:
  • FIG. 1a represents a sectional view of an ammunition of the underwater vehicle type according to the prior art, equipped with a lethal system with a single hollow charge in the position of attack with respect to a mooring mine.
  • Figure 1b is a sectional view of the mode of action of the jet of the hollow charge of the ammunition shown in Figure 1a on the explosive of a mine.
  • Figures 2a and 2b a first embodiment of a hollow multi-charge munition according to the invention.
  • Figure 2c a sectional view of the mode of action of the jets of the hollow charges of the ammunition shown in Figures 2a and 2b.
  • Figures 3a and 3b a second embodiment of a hollow multi-charge munition according to the invention.
  • Figures 4a and 4b an embodiment of a synchronous pyrotechnic distributor usable for igniting the embodiment of Figures 2a and 2b.

Dans l'exemple d'utilisation d'une munition sous marine pour la destruction de mines à orin qui est montré à la figure 1a, la munition est placée en position d'attaque devant une mine à orin 1. La mine à orin 1 est maintenue immergée dans l'eau par un orin 2 fixé à un crapaud ou socle 3. Classiquement une coquille 4, souvent en acier, constitue le flotteur de la mine et à l'intérieur, un réservoir 5 contient le chargement explosif 6. La mine comprend aussi des moyens de détection 7 reliés à un dispositif de mise à feu 8.In the example of using an underwater munition for the destruction of orin mines which is shown in Figure 1a, the ammunition is placed in attack position in front of a mooring mine 1. Mooring mine 1 is kept immersed in water by a rope 2 attached to a toad or base 3. Conventionally a shell 4, often made of steel, constitutes the float of the mine and inside, a tank 5 contains the explosive charge 6. The mine also includes detection means 7 connected to a setting device fire 8.

La munition qui porte la référence 9 sur la figure la se compose d'un véhicule 10 et d'un système létal sous la forme d'une charge creuse comprenant un revêtement 11, un chargement explosif 12, un confinement latéral 13, un système de sécurité et mise à feu 14. Un volume mort 15 est généralement nécessaire au bon fonctionnement de la charge creuse. Dans certains cas la munition 9 peut faire fonctionner la charge creuse sans être au contact de la mine.The ammunition which bears the reference 9 in the figure la consists a vehicle 10 and a lethal system in the form of a shaped charge comprising a coating 11, an explosive charge 12, a containment side 13, a safety and ignition system 14. A dead volume 15 is generally necessary for the proper functioning of the shaped charge. In in some cases the ammunition 9 can operate the shaped charge without being in contact with the mine.

La mise à feu de la charge creuse provoque de la façon schématisée sur la figure 1b, l'explosion du chargement explosif 12 qui transforme le revêtement 11 en un jet 16 animé d'une vitesse de plusieurs km/s. Cette vitesse permet au jet de traverser hydrodynamiquement les parois d'acier de la coquille 4 et du réservoir 5 pour atteindre le chargement explosif 6. Le jet 16 en créant un cratère dans le chargement explosif 6 de la mine 1 génère une onde de choc qui développe une zone 17 sous très forte pression. Si la pression dans la zone 17 est assez élevée sur une surface suffisante, le critère V2d est satisfait et le chargement explosif 6 se trouve entraíné en détonation ce qui pulvérise la mine 1.
Suivant un premier mode de réalisation de l'invention qui est représenté aux figures 2a et 2b où les éléments homologues à ceux de la figure la sont représentés avec les mêmes références, le système létal est composé de trois charges creuses 18a, 18b, 18c équiréparties autour de l'axe d'attaque (OO') du système létal. Ces charges creuses sont disposées suivant les directions de trois plans à 120° et leurs axes longitudinaux X'X, sont concourants vers l'avant en un point α de l'axe OO' dont le réglage est prédéterminé en fonction de la distance d'attaque de la munition. A titre d'exemple les trois charges creuses sont identiques, elles sont constituées de façon similaire à celle représentée à la figure 1a, d'un revêtement 11, d'un chargement explosif 12, d'un confinement 13 et d'un système de mise à feu simultanée 19 des trois charges creuses. Le revêtement 11 est par exemple en cuivre, mais d'autres types de matériaux tels que l'aluminium ou des produits synthétiques (téflon...) ou des produits liquides (eau...) présentent un intérêt pour l'application. Il est important que le système de mise à feu 19 garantisse une bonne simultanéité de fonctionnement des charges creuses pour permettre les effets recherchés par l'invention tels qu'ils sont décrits. A titre d'exemple, le système de mise à feu 19 peut être un dispositif électronique connu qui amorce simultanément trois amorces détonateur à couche projetée 20. Un autre mode de réalisation peut consister en un distributeur pyrotechnique qui à partir d'un détonateur unique va propager simultanément la détonation vers les charges creuses.The ignition of the hollow charge provokes in a diagrammatic manner in FIG. 1b, the explosion of the explosive charge 12 which transforms the coating 11 into a jet 16 animated with a speed of several km / s. This speed allows the jet to hydrodynamically pass through the steel walls of the shell 4 and of the tank 5 to reach the explosive charge 6. The jet 16 by creating a crater in the explosive charge 6 of the mine 1 generates a shock wave which develops zone 17 under very strong pressure. If the pressure in zone 17 is high enough over a sufficient surface, the criterion V 2 d is satisfied and the explosive charge 6 is detonated which pulverizes the mine 1.
According to a first embodiment of the invention which is represented in FIGS. 2a and 2b where the elements homologous to those of FIG. 1a are represented with the same references, the lethal system is composed of three hollow charges 18a, 18b, 18c evenly distributed around the axis of attack (OO ') of the lethal system. These hollow charges are arranged in the directions of three planes at 120 ° and their longitudinal axes X'X, are concurrent forward at a point α of the axis OO 'whose adjustment is predetermined according to the distance d ammunition attack. By way of example, the three hollow charges are identical, they are constituted in a similar manner to that shown in FIG. 1a, of a coating 11, of an explosive charge 12, of a confinement 13 and of a system of simultaneous firing 19 of the three shaped charges. The coating 11 is for example made of copper, but other types of material such as aluminum or synthetic products (teflon, etc.) or liquid products (water, etc.) are of interest for the application. It is important that the firing system 19 guarantees good simultaneous operation of the hollow charges to allow the effects sought by the invention as described. By way of example, the firing system 19 can be a known electronic device which simultaneously initiates three detonator primers with a projected layer 20. Another embodiment can consist of a pyrotechnic distributor which, starting from a single detonator, goes simultaneously propagate the detonation towards the hollow charges.

La figure 2c montre après l'explosion des charges creuses 18a, 18b, 18c, l'interaction des jets 16 sur l'explosif de la mine. Chacun des jets développe autour du cratère qu'il crée, une zone 17 de surpression, la zone 17 étant définie par l'intersection avec la cible 14 du cône contenant les axes concourants XX' des charges creuses et centré sur l'axe d'attaque 00'. Les zones de surpression en se rejoignant se confinent mutuellement et crée une surface, soumise à une pression importante, supérieure à la somme des trois surfaces individuelles. Comme la vitesse d'un jet de charge creuse est en première approximation indépendante du calibre, il apparaít que le critère V2d sera plus facilement satisfait avec cette organisation de munition pour un volume plus faible et une quantité d'explosif bien moindre ce qui facilite largement la logistique au niveau des stockages des munitions, notamment dans les soutes des chasseurs de mines.Figure 2c shows after the explosion of the shaped charges 18a, 18b, 18c, the interaction of the jets 16 on the mine explosive. Each of the jets develops around the crater it creates, a zone 17 of overpressure, the zone 17 being defined by the intersection with the target 14 of the cone containing the concurrent axes XX 'of the hollow charges and centered on the axis of attack 00 '. The zones of overpressure by joining together confine each other and create a surface, subjected to a significant pressure, greater than the sum of the three individual surfaces. As the speed of a hollow charge jet is a first approximation independent of the caliber, it appears that the criterion V 2 d will be more easily satisfied with this organization of ammunition for a lower volume and a much lower quantity of explosive which greatly facilitates logistics in terms of ammunition storage, especially in the holds of mine hunters.

Les figures 3a et 3b, où les éléments homologues à ceux des figures 2a et 2b sont représentés avec les mêmes références, représentent un deuxième mode de réalisation du système létal selon l'invention. Pour réduire l'encombrement en calibre du système, les charges creuses sont placées les unes derrière les autres légèrement décalées dans 3 plans à 120° et leurs axes de révolution X'X sont concourants en un point α, situé à l'avant du système, dont la position est prédéterminée en fonction des conditions d'attaque de la munition. Pour obtenir une convergence spatio-temporelle des jets, le système de mise à feu 19 pilote l'initiateur des amorces détonateurs à couches projetées 20 de chaque charge creuse suivant une chronologie telle que les têtes des jets, de préférence homocinétique, agresse simultanément le chargement explosif de la mine.Figures 3a and 3b, where elements homologous to those of Figures 2a and 2b are shown with the same references, represent a second embodiment of the lethal system according to the invention. For reduce the size of the system, the shaped charges are placed one behind the other slightly offset in 3 planes 120 ° and their axes of revolution X'X are concurrent at a point α, located at the front of the system, the position of which is predetermined according to the ammunition attack conditions. To obtain spatio-temporal convergence jets, the ignition system 19 controls the initiator of the detonating primers with projected layers 20 of each shaped charge according to a chronology such as the heads of the jets, preferably constant velocity, simultaneously attacks the explosive charge of the mine.

Naturellement la réalisation du système létal selon l'invention n'est pas limitée à la seule mise en oeuvre de trois charges creuses et il va de soi que cette mise en oeuvre peut aussi être effectuée avec un nombre N supérieur à trois de charges équiréparties autour de l'axe d'attaque. Il est à noter qu'un nombre de charges N=2 ne permet pas la création d'une zone de confinement également répartie autour du point d'attaque de la mine.Naturally, the realization of the lethal system according to the invention is not not limited to the mere use of three shaped charges and it goes without saying that this implementation can also be carried out with a number N greater than three of loads evenly distributed around the axis of attack. He is at note that a number of charges N = 2 does not allow the creation of a zone containment also distributed around the mine attack point.

Suivant encore un autre mode de réalisation de l'invention, les systèmes de mise à feu 19 de chacune des charges creuses peuvent être avantageusement remplacés par un système de mise à feu unique réalisé sous la forme du distributeur pyrotechnique synchrone représenté aux figures 4a et 4b. Celui-ci comporte un relais pyrotechnique d'entrée 21 qui est mis en communication avec chacun des chargements explosifs par des relais 22 au travers de conduits 23. Lorsqu'avec ce dispositif le relais 21 est initialisé par une amorce, la détonation produite se propage à travers un réseau pyrotechnique formé par les conduits 23 dans lesquels est injecté par exemple un explosif à liant thermodurcissable. Ces derniers ont une longueur qui est déterminée pour conserver une symétrie des trajets des ondes de détonation et aboutir à une émergence simultanée de la détonation en sortie des relais 22.According to yet another embodiment of the invention, the firing systems 19 of each of the shaped charges can be advantageously replaced by a unique firing system produced in the form of the synchronous pyrotechnic distributor shown in Figures 4a and 4b. This comprises an input pyrotechnic relay 21 which is put in communication with each of the explosive charges by relay 22 through conduits 23. When with this device relay 21 is initialized by a primer, the detonation produced propagates through a pyrotechnic network formed by the conduits 23 into which is injected by example an explosive with thermosetting binder. These have a length which is determined to maintain a symmetry of the paths of the detonation waves and result in a simultaneous emergence of the detonation at relay output 22.

Suivant ce même principe, il est aussi possible de réaliser un distributeur pyrotechnique séquentiel dont le réseau de conduits 23 est dissymétrique pour être adapté au mode de réalisation des figures 3a et 3b, afin de respecter la chronologie nécessaire à son fonctionnement.Following this same principle, it is also possible to carry out a sequential pyrotechnic distributor whose duct network 23 is asymmetrical to be adapted to the embodiment of FIGS. 3a and 3b, in order to respect the chronology necessary for its operation.

Enfin il est également possible sans sortir du cadre de l'invention de réaliser des munitions constituées d'un nombre entier de paquets placés les uns derrière les autres légèrement décalés multiple de au moins trois charges creuses pour réaliser N zones d'agression de la cible afin d'élargir la surface d'efficacité de la munition et ainsi compenser d'éventuelles erreurs de positionnement de celle-ci. La multiplication des axes d'attaque X'X sera alors d'autant plus intéressante que le pointage est incertain.Finally it is also possible without departing from the scope of the invention to produce ammunition made up of a whole number of packets placed one behind the other slightly offset multiple of at least three shaped charges to achieve N target aggression zones in order to widen the ammunition efficiency surface and thus compensate for any errors positioning thereof. The multiplication of the attack axes X'X will be then all the more interesting as the score is uncertain.

On pourra également, lorsque la munition est destinée à travailler à grande distance d'attaque et pour éviter de consommer les jets des charges creuses dans l'eau, adapter devant le système létal soit une charge creuse dont le jet cratérise l'eau en formant un tunnel pour le passage des jets du système létal, soit de la même manière une charge explosive qui crée une bulle entre le système létal et la mine.We can also, when the ammunition is intended to work at a long attack distance and to avoid consuming the jets of hollow charges in water, adapt before the lethal system be a charge hollow whose jet crater the water by forming a tunnel for the passage of lethal system jets, in the same way an explosive charge which creates a bubble between the lethal system and the mine.

Claims (12)

  1. Countermeasure munition comprising a lethal system made up of several hollow charges distributed about a line of attack (00'), the hollow charges (18a, 18b, 18c) having concurrent longitudinal axes (XX'), each hollow charge being intended to produce a hollow charge jet (16) acting concomitantly in a region (17) of a target (14) with the other hollow charges, characterized in that
    the longitudinal axes (XX') are distributed at uniform angles about the line of attack (00')
    the hollow charges (18a, 18b, 18c) are at least three in number, the region (17) being defined by the intersection with the target (14) of the cone containing the concurrent axes (XX') of the hollow charges and centred on the line of attack (00').
  2. Munition according to Claim 1, characterized in that the lethal system comprises a whole number N of bundles of at least three hollow charges (18a, 18b, 18c) to form N regions of attack on the target (14).
  3. Munition according to Claim 1, characterized in that the hollow charges (18a, 18b, 18c) are three in number and arranged in the directions of three planes at 120°.
  4. Munition according to Claim 1, characterized in that the hollow charges (18a, 18b, 18c) are placed one behind the other with a small offset.
  5. Munition according to Claim 2, characterized in that the bundles are placed one behind the other with a small offset.
  6. Munition according to any one of Claims 1 to 3, characterized in that the firing (19) of the hollow charges (18a, 18b, 18c) is performed by a synchronous device comprising a detonator primer with layer projected by a hollow charge.
  7. Munition according to any one of Claims 1 to 4, characterized in that the firing (19) of the hollow charges (18a, 18b, 18c) is performed by a pyrotechnic distributor (21, 22, 23) initiated by a single primer.
  8. Munition according to any one of Claims 1 to 5, characterized in that the firing of the hollow charges (18a, 18b, 18c) is performed by a pyrotechnic device (19) which provides a timing sequence that compensates for the differences in jet path.
  9. Munition according to Claims 1 to 8, characterized in that the hollow charges have a coating (11) made of metal or synthetic or liquid material.
  10. Munition according to any one of Claims 1 to 9, characterized in that it comprises an additional hollow charge placed in front of the lethal system.
  11. Munition according to any one of Claims 1 to 8, characterized in that it comprises an explosive charge placed in front of the lethal system.
  12. Use of the munition according to any one of Claims 1 to 11 as an underwater vehicle for destroying mines.
EP99922246A 1998-06-09 1999-06-01 Countermeasure ammunition Expired - Lifetime EP1000312B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9807241 1998-06-09
FR9807241A FR2779514B1 (en) 1998-06-09 1998-06-09 COUNTER-MEASURE AMMUNITION
PCT/FR1999/001283 WO1999064812A1 (en) 1998-06-09 1999-06-01 Countermeasure ammunition

Publications (2)

Publication Number Publication Date
EP1000312A1 EP1000312A1 (en) 2000-05-17
EP1000312B1 true EP1000312B1 (en) 2003-10-08

Family

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Application Number Title Priority Date Filing Date
EP99922246A Expired - Lifetime EP1000312B1 (en) 1998-06-09 1999-06-01 Countermeasure ammunition

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EP (1) EP1000312B1 (en)
DE (1) DE69911884T2 (en)
DK (1) DK1000312T3 (en)
ES (1) ES2209435T3 (en)
FR (1) FR2779514B1 (en)
WO (1) WO1999064812A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6540175B1 (en) * 2001-12-03 2003-04-01 Lockheed Martin Corporation System for clearing buried and surface mines
DE102010051491A1 (en) 2010-11-15 2012-05-16 Atlas Elektronik Gmbh Underwater vehicle and underwater system with an underwater vehicle
DE102018214824A1 (en) * 2018-08-31 2020-03-05 Atlas Elektronik Gmbh Clearance device and method for neutralizing a weapon under water
DE102019213944A1 (en) 2019-09-12 2021-03-18 Atlas Elektronik Gmbh Underwater vehicle with two shaped charges arranged one behind the other

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880103A (en) * 1972-08-21 1975-04-29 Us Navy Tethered mine hunting system
DE2829002C2 (en) * 1978-07-01 1985-04-04 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Warhead
DE2829001C2 (en) * 1978-07-01 1983-09-22 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Warhead with a main active body and one or more secondary active bodies
DE3010917C2 (en) * 1980-03-21 1984-03-01 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Warhead with a main hollow charge and at least one pre-hollow charge
DE3626434C3 (en) * 1986-08-05 1994-10-20 Diehl Gmbh & Co Method and device for destroying large-volume seabed mines
DE3739370A1 (en) * 1987-11-20 1989-06-01 Diehl Gmbh & Co Bomblet warhead (cluster munition)
DE19543757C2 (en) * 1995-11-24 1997-09-04 Diehl Gmbh & Co Procedures for combating sea mines

Also Published As

Publication number Publication date
ES2209435T3 (en) 2004-06-16
DE69911884D1 (en) 2003-11-13
DK1000312T3 (en) 2004-02-09
FR2779514A1 (en) 1999-12-10
EP1000312A1 (en) 2000-05-17
DE69911884T2 (en) 2004-09-09
WO1999064812A1 (en) 1999-12-16
FR2779514B1 (en) 2001-01-26

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