JPH0443300A - Dual-effect warhead - Google Patents

Abstract

PURPOSE:To make the effect of fragment and blast more powerful by a method wherein two kinds of explosives, one of which is provided with a high explosion speed and the other of which is provided with a low explosion speed and a high density, are combined in a metallic case. CONSTITUTION:Explosives 1, 11, 21 having a high explosion speed, an explosive 3, having a low explosion speed, and an explosive 13, having a high density, or an explosive 23, having a low explosion speed and a high density, start reaction by the detonation of boosters 4, 14, 24, which are initiated by primers 5, 15, 25. Outer peripheral metallic cases 2, 12, 22 are affected by the detonation of the explosive having a high explosion speed, which is located inside of the cases, and detonations of the explosive, having a low explosion speed, the explosive, having a high density, or the detonation of the explosive, having a low explosion speed and a high density, are generated whereby fragments, having higher speed than the same of a warhead employing only the explosive having a high explosion speed, are scattered and more powerful blast is discharged simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a dual-effect warhead that can make the effects of fragmentation and blast waves more powerful in the warhead.

<Prior art> The fragmentation speed of a warhead is basically determined by the detonation speed of the explosive charge contained inside the warhead and the ratio of the weight of the explosive charge to the weight of the metal part that becomes fragments. The only way to do this is to use explosives with a high velocity or increase the weight of the explosives.Also, to increase the strength of the blast, similarly increase the weight of the explosives. Otherwise, the only option is to sacrifice explosive speed and use explosives with a large blast effect.

<Problem to be solved by the invention> Since the detonation speed of an explosive charge is primarily determined by the performance of the explosive components that are the raw materials for the charge, there is naturally a limit to the fragmentation speed of a warhead.

Furthermore, in order to strengthen the blast effect, it is necessary to add ingredients such as aluminum powder to the explosive, and in this case, the blast speed decreases.

In other words, there are limits to how much a single explosive can increase the fragmentation velocity or the blast effect, and new, groundbreaking technologies are currently being developed.

<Means for Solving the Problem> Therefore, as a result of research to meet the above-mentioned request, the present inventors found that the objective could be achieved by combining two types of explosives, specifically, by combining two types of explosives. , the knowledge that by combining explosives with a lower detonation velocity or higher density, or a combination of lower detonation velocity and higher density, the fragmentation velocity becomes higher and the blast effect becomes greater, compared to a warhead with only a high detonation velocity explosive. Based on this knowledge, they invented a dual-effect warhead with higher fragmentation velocity and greater blast effect.

That is, the present invention consists of a metal case, a high detonation velocity explosive, and a low detonation velocity or high density explosive, or a low detonation velocity and high density explosive, which has a lower detonation velocity or higher density than a high detonation velocity explosive. Also, a low explosive velocity and high density explosive charge is placed in contact with the metal case! The present invention relates to a dual-effect warhead, which is characterized by having a high-velocity explosive charge disposed therein, and having a detonation means.

Next, a description will be given based on FIGS. 1, 2, and 3 showing longitudinal cross-sectional views of a preferred configuration of the dual-effect warhead of the present invention.

In the figure, A, B, and C are dual-effect warheads of the present invention, which include a metal case 2, 12, and 22, a hollow cylindrical low-explosion explosive charge 3 provided in contact with the inner wall of the metal case, or High density explosive charge 13 or low detonation velocity and high density explosive charge 2
3, and a cylindrical high detonation velocity explosive charge 1.11.21, and the high detonation velocity explosive charge has a booster 4.14.24,
A detonator 5.15.25 is provided as shown.

The high detonation velocity explosive used in the present invention is, for example, an explosive whose main component is a secondary explosive such as cyclotetramethylenetetranitramine (HMX) or cyclotrimethylene trinitramine (RDX), and a low detonation velocity explosive or Examples of high-density explosives or low-detonation-velocity, high-density explosives include explosives consisting of the same main components as above, with the detonation velocity and density changed by changing the blending ratio of the main component and binder; These include explosives that contain exothermic agents such as aluminum powder, and explosives whose main ingredients are oxidizing agents and exothermic agents such as ammonium perchlorate and aluminum powder.

Among these explosive combinations, the one with particularly high fragmentation velocity and high blast pressure is the explosive 8, which has HMX as its main component.
It is a combination of an explosive with a high detonation velocity of 000 m/s or more and an explosive containing 40% by weight or more of ammonium perchlorate and 20% by weight or more of aluminum powder.

When the explosive charge detonates, the metal case is scattered at high speed as fragments, but in the case of a warhead that uses only one type of explosive charge,
The flying speed of this fragment is proportional to f to the detonation speed of the explosive charge inscribed in the metal case.

However, in the case of the dual-effect warhead of the present invention, the detonation of the low-detonation explosive charge inscribed in the metal case progresses at the detonation speed of the high-detonation velocity explosive charge inside, so super detonation (explosive is faster than the steady-state detonation velocity given by the Chapmanjuguet condition), and the detonation pressure generated is not only the detonation pressure specific to the explosive but also the detonation pressure specific to the high detonation velocity explosive. As a result, the fragmentation velocity will be higher than that of warheads using only high-velocity explosives.

On the other hand, when a high-density explosive is applied to the explosive that is inscribed in the metal case, the detonation of the high-density explosive proceeds at the detonation speed of the high-detonation explosive inside the metal case, and because of its high density, The detonation pressure increases (detonation pressure = density x detonation velocity x detonation velocity ÷
4). As a result, the fragmentation velocity will be higher than that of a warhead that uses only high-velocity explosives.

Furthermore, when a low detonation velocity and high density explosive charge is applied to the explosive charge inscribed in the metal case, the above two effects overlap and the detonation pressure becomes even higher. faster than warheads using

In any of the above three cases, the blast effect is enhanced for the same reason.

Further, if the outer low detonation velocity explosive, high density explosive, or low detonation velocity and high density explosive contains a component that generates high temperature during detonation, such as aluminum powder, a filling effect can be expected.

In addition, if the outer low-detonation-velocity explosive, high-density explosive, or low-detonation-velocity, high-density explosive has low sensitivity to impact, etc., this will lead to a decrease in the sensitivity of the warhead itself.

When the purpose is to increase the fragmentation velocity of a warhead, the appropriate thickness is usually 20 mm or less, as the thickness of the explosive charge inscribed in the metal case is influenced by the speed at which the detonation of the high-velocity explosive charge inside it progresses. It is. However, this does not apply if the blast effect is more important than the fragmentation speed.

The material of the metal case is determined by the purpose of use of the warhead, and is usually made of carbon steel, high-strength steel, etc., which have good fragmentation properties.

The same effect can be obtained regardless of whether the detonator and booster are in contact with a high-velocity explosive or a low-velocity explosive.

<Function> In the case of a warhead that uses only one type of explosive charge, the metal case is scattered at high speed as fragments due to the detonation of the explosive charge, but
The flying speed of this fragment is proportional to f to the detonation speed of the explosive charge inscribed in the metal case.

On the other hand, when the dual-effect warhead of the present invention is applied, the effects described below are different from those of a warhead using only one type of explosive.

Booster 4.14 detonated by detonator 5.15.25
．． Due to the detonation of 24, the high detonation velocity explosive 1, 11, 21, the low detonation velocity explosive 3, the high density explosive 13, or the low detonation velocity and high density explosive 23 start to react. The outer metal case 2.12.22 is affected by the detonation of the inner high-velocity explosive, resulting in a higher detonation pressure of a low-detonation velocity explosive, a high-density explosive, or a low-detonation velocity and high-density explosive. The detonation causes the warhead to scatter at higher speeds than a warhead that uses only high-velocity explosives, and at the same time emit a more powerful blast wave to the outside.

<Effects of the Invention> By applying the dual-effect warhead of the present invention, more powerful fragmentation effects and blast effects are achieved compared to warheads using a single type of explosive charge.

Further, if the outer low detonation velocity explosive, high density explosive, or low detonation velocity and high density explosive contains a component that generates high temperature during detonation, such as aluminum powder, a filling effect can be expected.

In addition, if the outer low detonation velocity explosive charge, high density explosive charge, or low detonation velocity and high density explosive charge has low sensitivity to impact etc., this will lead to a decrease in the sensitivity of the warhead itself.

<Examples> Examples 1 to 6 The warhead of the present invention shown in FIG. 1.2.3 was manufactured using the explosives shown in Table 1. The explosive charge was manufactured using a conventional slurry casting method. In addition, STK is used as a metal case.
Made of MI 7A carbon steel, outer diameter 89.1 mm, inner diameter 80
．． A piece with a shape of 3 mm and a length of 120 mm was used.

The manufactured warhead R1 was used to measure the average fragmentation velocity at a distance of 3 m using a conventional foil tester and the blast pressure at a distance of 3 m using a conventional piezo pressure element. In addition, the measured value was determined as a relative ratio when Comparative Example 1 was set to 1.00.

The results are shown in Table 2.

Comparative Examples 1 and 2 As shown in Table 1, warheads were manufactured in the same manner as in the examples except that only the high detonation velocity explosive used in the examples was filled in the same metal case as in the examples.

The same tests as in the example were conducted on this warhead. The measured value of Comparative Example 1 was set to 1.00, and the measured value of Comparative Example 2 was determined as a relative ratio thereof.

The results are shown in Table 2.

5), 7900111/S made of 70% HMX, 10% aluminum powder, and the rest polyurethane binder.
, explosive charge with a density of 1.81 g/cm"6), 56% HMX
, 24% aluminum powder, the rest is polyurethane binder, explosive speed 7900 m/s, density 1.89 g/am"
Explosive charge 7); Ammonium perchlorate 42%, aluminum powder 2
6%, the rest is polyurethane binder, making it extremely fast 6
000 m/s, explosive charge with a density of 1.95 g/am"1),
80% HMX, the rest is polyurethane binder, explosion speed 8300111/S, density 1.74g/cm
Explosive charge 2): 75% RDX, the rest is polyurethane binder, explosion speed 7900 Ia/s, density 1.6
4g/c♂ explosive 3), 60% RDX, aluminum powder 16
%, the remainder is made of polyurethane binder and has an explosive speed of 73.
0001/S, explosive charge with a density of 1.74 g/cm"4);
40% ammonium perchlorate, 20% aluminum powder, the balance is polybutadiene binder, explosive speed 6000m/s
, Explosives Examples 7 and 8 with a density of 1.74 g/male In order to understand the effect on lowering sensitivity, the samples shown in Table 3 were prepared, and the sensitivity was measured by the card gap test method. In addition, the measured value was determined as a relative ratio when Comparative Example 1 was set to 1.00. The results are shown in Table 3.

Next, a card gap test method will be explained based on the apparatus shown in FIG.

In the figure, 41 is a detonator, 42 is bentolite (pentaerythritol tetranitrate 50, nitrinitrotoluene 50), 43 is an acrylic resin plate serving as a card gap, 44 is a sample filled in a steel pipe 45, and 46 is an iron plate. The bentrite used is 30 mmφ x 30 mm, and the acrylic resin plate is 50 mm x 50 mm and 5 mm or 10 mm thick.

The steel pipe has an outer diameter of 42.7mm and a thickness of 3.5mm.

The sample has a length of 50 mm, and b is an explosive with a high detonation velocity, and a is an explosive with a lower detonation velocity or higher density than the above explosive, or an explosive with a lower detonation velocity and higher density. In the test, a ventrite is detonated using a detonator, and a sample explosive placed across a resin plate (card gap) is examined to see if it detonates, and judgment is made based on the detonation marks created on the steel plate. A test is conducted by varying the gap length, and the gap length at which there is a 50% probability of detonation is defined as the 50% detonation gap length.

Comparative Example 3 Using the explosives shown in Table 3, that is, using explosives with high detonation velocity, samples were prepared according to the example, and the same tests as in the example were conducted.

The results are shown in Table 3.

It consists of a binder with an explosive speed of 6000 m/s and a density of 1.
Explosive charge 2) of 95g/mouth 3), 80% HMX, the rest made of polyurethane binder, explosive speed 8300m/s,
Explosive charge with a density of 1.74 g/am'' Table 2 shows that a warhead with the explosive charge of the present invention has a higher fragmentation velocity and blast pressure than a warhead with a single explosive charge; In contrast, when multiple explosives of the present invention are used, the gap length is short;
In other words, it shows that it does not detonate upon impact.

[Brief explanation of drawings]

FIG. 1.2.3 is a cross-sectional view showing an example of the dual-effect warhead of the present invention. FIG. 4 is a diagram illustrating the card gap test method. In the figure, A, B, C, dual effect warhead of the present invention,
1, 11, 21. High velocity explosive, 2°12.22. Metal case, 3; Low explosive velocity, 13; High density explosive, 23
; low detonation velocity and high density explosive, 4.14, 24. Booster, 5,15° 25; Detonator, 41: Detonator, 42; Bent light, 43; Acrylic resin plate, 44; Explosive charge, 45; Steel pipe, 46; Iron plate. Figure 3

Claims (3)

[Claims] (1) Consisting of a metal case, a high detonation velocity explosive, and a lower detonation velocity explosive, the low detonation velocity explosive is placed in contact with the metal case, and the high detonation velocity explosive is placed inside the low detonation velocity explosive. , and a dual-effect warhead characterized by having a detonator. (2) Consisting of a metal case, a high-detonation velocity explosive, and a higher-density explosive, the high-density explosive is placed in contact with the metal case, and the high-detonation-velocity explosive is placed inside the high-density explosive. , and a dual-effect warhead characterized by having a detonator. (3) Consisting of a metal case, a high detonation velocity explosive, and a lower detonation velocity and higher density explosive than the same explosive; the low detonation velocity and high density explosive is placed in contact with the metal case, and the high detonation velocity explosive is A dual-effect warhead that is placed inside a dense explosive charge and has a detonator.