DK2314980T3

DK2314980T3 - The damping device for mounting parts of the penetrators

Info

Publication number: DK2314980T3
Application number: DK10013800.7T
Authority: DK
Inventors: Hans-Dieter Ackermann; Andreas Seitz
Original assignee: Tdw Ges Für Verteidigungstechnische Wirksysteme Mbh
Priority date: 2009-10-21
Filing date: 2010-10-20
Publication date: 2015-06-29
Also published as: ES2538124T3; DE102009050162A1; EP2314980A3; EP2314980A2; EP2314980B1

Description

The invention relates to a damping device for built-in parts in penetrators with a damping layer applied to the Inside of the casing, said layer enclosing at least one bullt-ln part In an annular manner and damping the shock waves acting on the casing by means of deformation and the wall thickness thereof extending approximately constantly over the length of the layer in the longitudinal direction of the penetrator.

Penetrators are known active means that are used in particular for neutralising high-value targets. Said targets Include highly hardened structures or objects such as for example command centres or communications centres. The penetrators are suitable for penetrating into the target. The initiation is carried out by means of intelligent ignition devices only in the interior of the target.

The requirements on such penetrators are increasingly higher. Thus for example, high-strength concrete is used for the construction of modern bunkers. Furthermore, there are positions in natural surroundings, such as for example cavities in rocks. Said rock is generally even harder than the high-strength concrete. In order to meet the requirements resulting therefrom, the calibre of the penetrators is reduced and their speed is increased. The increase in the speed results in unwanted effects, however. During the penetration of the outer layers of the target the structure of the penetrator Is highly loaded. During Impact very high loads are exerted on the casing of the penetrator and the high frequency shock waves arising are passed Into the interior of the penetrator almost undamped by the stiff penetrator casing. Internal components can hence be loaded to the point of failure in the case of a simple mechanical connection to the penetrator casing. In real penetrators, however, the axial installation space for the introduction of an effective damping device is limited. The smaller is the penetrator, the greater are the accelerations and the required distance between the penetrator casing and the built-in parts in the interior of the penetrator.

Said processes have a significant effect on the built-in parts mounted in the interior of the casing, such as for example the ignition device and the explosive charge, because the same are subjected to very different loads. On the one hand there is a static load from the deceleration that the penetrator undergoes. Furthermore, a shock wave occurs that passes through the penetrator. In addition there is a vibration load from the natural oscillation and the structural vibration of the penetrator. Finally, local compression or stretching of all the materials in a penetrator are also to be taken into account. A penetrator has become known from DE 10 2005 009 931 B3 that comprises various arrangements of damping layers for the protection of the explosive charge disposed in the interior of the penetrator. According to the proposal, the layer in contact with the inside of the casing extends from the tip to the rear of the casing of the penetrator, wherein its thickness decreases starting from the tip or remains constant. The damping layer protects the explosive charge against the shock load during impact and thus prevents a premature detonation or a sensitization of the explosive. However, the document contains no reference to the efficient damping of mechanical built-in parts in the interior of the penetrator. In particular, the support of parts especially disposed in the rear of a penetrator is not possible using the described damping means .

The object of the invention is therefore to propose an effective damping device for the other built-in parts in addition to the already known damping of the explosive disposed in the interior of the penetrator.

This object is achieved in a simple manner by the damping device according to Claim 1.

The particular advantage of said arrangement is that the damping layer can be kept very compact because the same does not necessarily have to extend over the entire length of a built-in part or even a possible further built-in part. The damping layer can even only extend over a part of the length of the built-in part or it can be divided once or multiple times into rings.

Because the mechanical connection between the built-in part and the casing essentially only extends over the layer, the damping properties can be defined within wide limits by selecting the geometry and the material of the layer. As a result of the firm connection of the layer to the casing and the built-in part, deformation occurs in the event of suitable accelerations and the energy that is applied is converted into deformation energy. A further embodiment is produced by the toothing that is formed by the recesses and devices extending annularly or helically. The layer can be simply adapted to the situation by means of the type and shape of the toothing during the fitting of the built-in part in the penetrator. A further improvement can be achieved by providing, in addition to the damping layer, at least one further damping layer extending conically in the longitudinal direction. This enables movements in the longitudinal and lateral direction to be specifically influenced and damped. A further embodiment consists of disposing the further conical damping layer before the damping layer when viewed in the direction of flight.

Finally, it is advantageous if at least one adjustment part is provided between the built-in part and at least one further component that is disposed in the interior of the penetrator. This enables a fine adjustment of the position of the components relative to each other.

Exemplary embodiments of the invention are illustrated in the figures in a simplified form and are described in detail below using the figures. In the figures:

Fig. 1: shows a first exemplary embodiment of a damping device.

Fig. 2: shows a further simplified embodiment of a damping device.

The damping device 3 illustrated in Figure 1 is mounted in a penetrator ^ between its casing 1 and a built-in part 2, for example an ignition device. The explosive charge 6 is disposed before the built-in part 2 in the direction of flight 7b. The damping layer 3 is designed such that in the unloaded state it is firmly connected both to the built-in part 2 and also to the casing 1 of the penetrator. The connection is designed such that the damping layer is deformed as a result of the high accelerations during impact of the penetrator on a target and the energy is dissipated in the form of deformation energy.

Said connection can for example be a bond between the damping layer and the inside of the casing. Moreover, in the exemplary embodiment the damping layer 3 comprises a series of recesses 8 in which devices with an approximately tooth-shaped cross-section that are mounted on the outside of the built-in part engage in a form-fit manner.

In this case said toothing can be annular with at least one circumferential ring or even in the form of a helix.

By means of said design, high freguency accelerations of large amplitude are avoided and a uniform acceleration profile with a low maximum acceleration is achieved.

In addition to the damping layer 3, a further layer 4a with similar properties can be provided, which is disposed in the region of a shoulder la of the casing 1 in the form of a conical ring and which supports the built-in part 2 relative to the shoulder la.

Advantageously, a spacer 5 of a single part or of a plurality of parts is provided between the built-in part 2 and the explosive charge 6. It is also helpful to dispose an additional soft layer 4b between the built-in part 2 and the rear wall of the casing 1, said soft layer being capable of damping vibrations in the direction of the main axis 7a of the penetrator. A different embodiment of the damping layer 3 is shown in Figure 2. In this case an annular conical damping layer 3 of fitted material is used, being positioned on the shoulder la of the casing 1 and absorbing the significant part of the deformation energy. In addition a further soft layer 4a can be provided.

The opening angle of the casing 1 facilitates the introduction of compressible materials, such as for example the explosive 6. There is a soft suspension of the built-in part 2 in the axial direction 7a by means of the cone. The high frequency accelerations of large amplitude are avoided in this way and a uniform acceleration profile with a low maximum acceleration is achieved.

Additional conical or planar soft layers 4b can be used for the specific adjustment of said system, which operates on the basis of a spring-damper principle.

Claims

A damping device for integral parts of penetrators (P) having a damping layer (3), which lies up to the inside of the casing (1), which surrounds at least one integral part (2) in annular form and by means of deformation dampens the shock waves, acting on the cladding (1) and whose wall thickness (d) extends approximately constantly via the length (L) of the layer (3) in the longitudinal direction (7) of the penetrator (P), with the attenuating layer (3) extending at least sectionally over the length (L) of 1 at least one longitudinal part (2) in the longitudinal direction (7a) of the penetrator (P), and the damping layer (3) on an external surface is firmly connected to the casing (1) of the penetrator (P) or the exterior side of the housing part (2), characterized in that the cushioning layer (3) in its respective second outer surface is provided with recesses (8) corresponding to molding with circumferential devices (9) having a roughly tooth-shaped cross-section on the inside of the the cover (1) for the pen the rotor (P) or the outside of the recessed part (2).

Damping device according to claim 1, characterized in that the toothing, which consists of the recesses (8) and the devices (9), runs in annular or helical form.

An attenuating device according to claim 1 or 2, characterized in that, in addition to the attenuating layer (3), there is provided at least one additional layer (4a) which extends tapered 1 in relation to the longitudinal direction (7a) and which is attenuating located between the casing (1) and the recess (2).

An attenuating device according to claim 3, characterized in that the additional layer (4a) extending conically and attenuating is positioned before the attenuating layer (3) in the escape direction (7b).

5th

Attenuating device according to at least one of claims 1 to 3, characterized in that at least one adjusting piece (5) is provided between the housing part (2) and at least one additional building part (6) located in the interior space of the penetrator. ).