CN114508968B - Preparation method and evaluation method of composite-structure energetic micropellet damage cloud - Google Patents

Preparation method and evaluation method of composite-structure energetic micropellet damage cloud Download PDF

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CN114508968B
CN114508968B CN202210027044.8A CN202210027044A CN114508968B CN 114508968 B CN114508968 B CN 114508968B CN 202210027044 A CN202210027044 A CN 202210027044A CN 114508968 B CN114508968 B CN 114508968B
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CN114508968A (en
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束庆海
赵帅
石艳松
姚嫒嫒
李超
蒋教平
王东旭
吴启才
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Beijing Hanneng Xianfeng New Material Technology Co ltd
Beijing Huayi Xianfeng Special Equipment Co ltd
Beijing Institute of Technology BIT
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Beijing Hanneng Xianfeng New Material Technology Co ltd
Beijing Huayi Xianfeng Special Equipment Co ltd
Beijing Institute of Technology BIT
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    • 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
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
    • 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
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • 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
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/76—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B35/00—Testing or checking of ammunition
    • F42B35/02—Gauging, sorting, trimming or shortening cartridges or missiles
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/08—Probabilistic or stochastic CAD
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/10—Numerical modelling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

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Abstract

The invention relates to a preparation method and an evaluation method of a composite structure energetic micropellet damage cloud, which are used for matching and preparing a high-activity energetic core material and a high-strength energetic shell material, wherein the obtained composite structure energetic micropellet has the advantages of high energy, high activity, high strength and low density, can reduce the weight of a warhead, improve the filling ratio, has excellent penetration, explosion and combustion multiple composite damage effects, and can effectively damage aluminum plates, steel plates and typical heat-resistant material plates. The composite structure energetic micropellet can maintain excellent integrity and damage effect on targets through the explosive explosion driving. The composite structure energetic micropill has reasonable preparation, reliable source of raw materials, mature manufacturing technique and good stability. The composite structure energetic micropill warhead has the feasibility of realizing, can intercept an aircraft efficiently and reduce the guidance precision by adopting a combined loading mode of gradient loading and spherical loading through simulation. Meanwhile, the evaluation method is simple, efficient and reliable.

Description

Preparation method and evaluation method of composite-structure energetic micropellet damage cloud
Technical Field
The invention relates to a preparation method and an evaluation method of an energetic micropellet damage cloud with a composite structure, and belongs to the field of energetic materials and warheads.
Background
At present, the target is destroyed mainly by a projectile which directly hits the target or by a burst field and a shock wave formed by explosion of the warhead after approaching the target. For conventional weapon ammunition, direct targeting is difficult to achieve without an accurate guidance fuze, and the impact destructive effect of the shock wave is rapidly attenuated with increasing distance. Therefore, the damage to the target by the burst field generated after the warhead explosion is the most common damage approach. However, since the conventional warhead uses an inert tungsten alloy as a fragment, there are several disadvantages: (1) The effective killing radius of the broken piece is only in the order of meters, under the condition of high bullet mesh relative speed, the requirement on accurate guidance is extremely high, the target can be hit only in a small range when the target-off distance is required, and the 100% killing probability is difficult to meet; (2) In order to ensure that the fragments can effectively break down the target, the fragments need to have higher kinetic energy and larger mass, so that the number of fragments is likely to be greatly reduced, and the target quantity per unit area is limited; (3) In order to pursue the precision of guidance, the weight of the warhead is sacrificed, and the effective load of the warhead is reduced, so that the efficiency-cost ratio of the warhead is reduced. In addition, research on the damage effect on the target under the condition of different fragment distribution situations is one of important factors for measuring the damage performance of the target and making damage evaluation. Because the scattered situation of the fragment field formed by the explosion of the warhead in space is random and uncertain, the striking effect of the fragment on the target when the target is damaged is random and uncertain, and the target is in different damage degrees after being struck. Therefore, the related calculation method of the fragment distribution situation model and the target damage established under different intersection conditions is complex and cumbersome, and the post-effect damage effect of the active fragments cannot be coupled, so that the method is unreliable.
Disclosure of Invention
The invention aims to solve the problems of small damage radius, high guidance precision, single damage mechanism, low damage efficiency cost ratio and complex and fussy damage evaluation method caused by the conventional warhead using inert tungsten alloy as a damage element, and solve the technical problem that a conventional anti-air reverse conduction mode is difficult to form a substantial threat to a high-speed aircraft.
The invention relates to a preparation method and an evaluation method of a composite structure energetic micropellet damage cloud, wherein the composite structure energetic micropellet is an energetic micropellet with a core-shell structure and consists of a high-activity energetic core material and a high-strength energetic shell material with impact reaction characteristics. The traditional polymer-based energetic fragment has high energy and high activity, but the mechanical property shows brittleness, and can not keep integrity when the explosive is driven to be thrown. Although the traditional metal-based energy-containing fragment has better mechanical property by adding inert metal components, the energy and activity of the traditional metal-based energy-containing fragment can be reduced, the density and weight of the traditional metal-based energy-containing fragment can be increased, the damage effect on a target plate can be reduced, and the density and range of forming energy-containing fragment cloud can be reduced. In contrast, the composite structure energetic micropellet has extremely high strength and lower density besides excellent energy release characteristics, generally has enough insensitive maintenance of structural integrity under static or quasi-static load, has extremely strong penetration capability when striking a target, can realize multiple striking of blasting effect, high temperature effect and spark effect as an active fragment, and has extremely great development potential in the national defense fields such as air defense and reverse conduction.
The energetic micropellets destroy clouds, namely, a large number of energetic micropellets are filled in a warhead, and a large-area energetic fragment cloud cluster is formed by throwing the warhead, so that a large-range blocking area is formed in front of a target trajectory. When the target passes through the energy-containing fragment cloud cluster, the energy-containing micropulse impacts the target and then pre-damages the heat-proof structure, so that the heat balance of the target is destroyed, the heat-proof structure is partially and seriously ablated, and then damages such as perforation, crushing or falling are generated, and finally the target is disintegrated or deviates from a preset trajectory. The damage mechanism of the energetic micropellet damage cloud mainly comprises kinetic energy generated by collision of an energetic fragment and an aircraft, explosion energy of the energetic fragment and aerodynamic and pneumatic heat energy of high-speed flight of the aircraft, and the energetic micropellet damage cloud is a typical composite energy effect compared with the single kinetic energy effect of a conventional inert fragment.
The aim of the invention is achieved by the following technical scheme.
A preparation method of a composite structure energetic micropellet damage cloud comprises the following steps:
s1, selecting a high-activity core material and a high-strength shell material to perform integrated preparation of energy, mechanics and safety performance, so as to obtain an energetic micropill with a composite structure as a warhead fragment;
s2, adopting a large-speed gradient technology, a speed gradient homogenization technology and a multi-layer fragment driving control technology to prepare a warhead structure;
s3, selecting a charging shell as a warhead bearing structure;
s4, selecting an explosive with moderate explosion velocity as a warhead charge;
and S5, selecting key parameters such as the size of the warhead, the size of the energetic micropellets, the scattering density, the scattering radius, the throwing speed, the cloud cluster forming time, the duration time and the like, and calculating the quantity and the quality of the energetic micropellets.
Preferably, the high activity core material comprises aluminum/fluoropolymer, aluminum/fluoropolymer/tungsten, aluminum/active metal/fluoropolymer/tungsten, aluminum/hydride/fluoropolymer/tungsten, thermite/fluoropolymer/tungsten, aluminum/fluoropolymer/tungsten/nonmetallic compounds, and the like. The high-strength shell material comprises an active alloy material, an active amorphous material, an active high-entropy alloy material and the like.
Preferably, the large velocity gradient technique, the velocity gradient homogenization technique, the multi-layer fragment driving control technique include gradient charging, spherical charging, combined charging, and the like.
The explosion dispersion technology of the energetic micropellets directly affects the damage radius of the damaged cloud, the uniformity of the distribution of the energetic micropellets in the cloud cluster and the reliable density of the energetic micropellets in the process of encountering the bullet. The large-speed gradient technology is a key and core for realizing radial uniform distribution, and the larger the speed gradient is, the smaller the formed damaged cloud center blind area is; the speed gradient homogenization technology is a key for ensuring the radial distance of the energetic micropellets; the multilayer fragment driving control technology is a key for accurately driving hundreds of thousands or even millions of energetic micropellets in the warhead. For this purpose, a gradient or spherical throwing assembly is designed in the energetic micropellet warhead. The gradient throwing component designs the warhead main body and the main charge into a shape with a certain taper, and increases the difference between the highest throwing speed and the lowest throwing speed of the energetic micropellet. The spherical throwing component is formed by arranging energetic micropellets on the surface of the spherical throwing component, and spherical charges are arranged at the center of the spherical throwing component and are scattered in a spherical shape after being thrown. Meanwhile, the charging shell is used as a bearing structure, so that the even distribution of the energetic micropellets of the warhead is ensured.
Preferably, the charge housing material comprises an aluminium alloy, an aluminium magnesium alloy or the like.
Preferably, the moderate detonation velocity explosive comprises HMX based blended explosive, RDX based blended explosive, ntu based blended explosive, or the like.
Preferably, the energetic micropellet size comprises 5mm and below, and the shape comprises cylindrical, square, spherical and the like.
The method for evaluating the damage cloud of the high-activity energetic micropellets comprises the following steps:
s1, taking the prepared warhead as a research object, and theoretically calculating the scattering range and the average scattering density of the energetic micropellets at different moments;
s2, randomly sampling the speed, direction and size of the energetic micropellets by adopting a Monte-Carlo simulation method, selecting a sector area with the size of about 1m multiplied by 1m as a statistical area, counting the average scattering density of the energetic micropellets in each area, and comparing with a theoretical calculation result;
s3, calculating the probability that each statistical region of the energetic micropill in the power radius meets the requirement of the scattering density according to 100 Monte-Carlo simulations;
s4, obtaining a reasonable and feasible technical scheme of the warhead of the energetic micropill through engineering calculation and numerical simulation;
s5, evaluating the damage efficiency of the energetic micropellets through the transmitting device, the activating device and the shooting device;
s6, evaluating the throwing integrity, the scattering density and the damage efficiency of the energetic micropellets through a warhead throwing device;
s7, comprehensively evaluating the damage cloud of the energetic micropellets of the composite structure according to the results of three-dimensional fragment cloud kinetic energy information, flare region outline information, fragment cloud combustion temperature information and the like obtained through comprehensive theoretical calculation, numerical simulation and experimental verification.
Preferably, the launching device may include, but is not limited to, a ballistic gun, a light gas gun, and the like;
the activation device may include, but is not limited to, a typical equivalent target plate;
the photographing device includes, but is not limited to, a pulse X-ray photographing device, a high-speed photographing device, and an infrared thermometer.
The invention has the beneficial effects that:
a preparation method and an evaluation method for the damaged cloud of the energetic micropill with a composite structure are provided, wherein a high-activity energetic core material and a high-strength energetic shell material are matched and prepared, and the obtained energetic micropill with the composite structure has the advantages of high energy, high activity, high strength and low density, can reduce the weight of a warhead and improve the filling ratio. The composite structure energetic micropellet has excellent penetration, explosion and combustion multiple composite damage effects, and can effectively damage aluminum plates, steel plates and typical heat-resistant material plates. The composite structure energetic micropellet is driven by the explosion of the high explosive, so that the excellent integrity and the damage effect on the target can be kept. The composite structure energetic micropill has reasonable formula design, reliable source of raw materials, guaranteed maturity of manufacturing technology, advanced technology and good stability. In addition, through theoretical calculation and simulation, the composite structure energetic micropill warhead has the feasibility of realization, can intercept an aircraft efficiently, and reduces guidance precision. Finally, the method for evaluating the damage cloud of the energetic micropellets is more reasonable, efficient and reliable.
Drawings
FIG. 1 is a physical photograph of an energetic micropellet of the composite structure of the example;
FIG. 2 is a photograph of a warhead structure of an example energetic micropellet;
FIG. 3a is the range and density of the dispersion of energetic micropellets at 0.35s in example;
FIG. 3b is the range and density of the dispersion of energetic micropellets at 0.45s in example;
FIG. 4a is a probability that each statistical region within the power radius at time 0.35s of the example meets the spread density requirement;
FIG. 4b is a probability that each statistical region within the power radius at time 0.45s of the example meets the spread density requirement;
FIG. 5 is a ground fault test result of the energetic micropellets of the example;
FIG. 6 is a plot of the results of a ground based static blasting test of energetic micropellets of the examples.
Detailed Description
The present invention will be further described in detail with reference to the following examples, which are not intended to limit the invention in any way. Unless otherwise indicated, all the materials used in the examples of the present invention were either commercially available or prepared according to methods conventional in the art using equipment commonly used in experiments. Unless defined or otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.
Example 1
A preparation method of a composite structure energetic micropellet damage cloud comprises the following steps:
s1, selecting a high-activity core material and a high-strength shell material to perform integrated preparation of energy, mechanics and safety performance, so as to obtain an energetic micropill with a composite structure, wherein the energetic micropill is used as a warhead fragment, as shown in figure 1;
s2, preparing a warhead structure by adopting a mode of combining gradient charge and spherical charge, as shown in figure 2;
s3, selecting a 1.5mm aluminum alloy charging shell as a warhead bearing structure;
s4, selecting JHFL-1 explosive as warhead charge;
s5, selecting a cylinder with the action height of the warhead of 30km, the size of the energetic micropellet of 5mm, the scattering radius of 60m, the forming time of 0.35S and the effective dead time of 0.1S. The gradient throwing assembly is designed to have a maximum throwing speed of 178+/-10% m/s and a minimum throwing speed of 26.7+/-10% m/s, and the number of the energetic micropellets is calculated to be about 27 ten thousands. The energy-containing micropellets in the spherical throwing assembly are arranged on the surface in a spherical shape, the spherical charge is arranged at the spherical center, the energy-containing micropellets are scattered in a spherical shape after being thrown, the throwing speed is designed to be 30m/s, and the number of the energy-containing micropellets is calculated to be about 2 ten thousands.
The method for evaluating the damage cloud of the energetic micropellets of the composite structure comprises the following steps:
s1, when 0.35S is calculated by theory, the outer diameter of the energetic micropellet cloud cluster of the gradient throwing assembly reaches 60m, the inner radius is 9.3m, and the average spreading density is 24.7 pieces/m 2 The method comprises the steps of carrying out a first treatment on the surface of the At 0.45s, the external diameter of the cloud of the energetic micropellets reaches 76.2m, the internal radius is 11.9m, and the average spreading density is 15.3 pieces/m 2 As in fig. 3a and 3b.
Due to the blocking of the end frame, the cloud of energetic pellets of the spherical casting assembly spread the sphere with a cone angle of about 21 deg.. Therefore, at 0.35s, the sphere radius was 10.4m, the blind area projection radius was 1.9m, and the average spreading density was 24.3 pieces/m 2 The method comprises the steps of carrying out a first treatment on the surface of the At 0.45s, the sphere radius is 13.4m, the blind area projection radius is 2.4m, and the average spreading density is 14.7 pieces/m 2 ；
S2, randomly sampling the speed, direction and size of the energetic micropellets by adopting a Monte-Carlo simulation method, selecting a sector area with the size of about 1m multiplied by 1m as a statistical area, and counting out that the lowest average scattering density of the energetic micropellets in each area at 0.35S and 0.45S meets the design requirement;
s3, according to 100 Monte-Carlo simulations, calculating that the probability that each statistical region of the energetic micropill in the power radius at the moments of 0.35S and 0.45S meets the requirement of scattering density is close to 1, as shown in fig. 4a and 4b;
s4, through engineering calculation and numerical simulation, the technical scheme of the warhead of the energetic micropill is reasonable and feasible;
s5, evaluating the damage efficiency of the energetic micropill through a 12.7mm ballistic gun, a 6mm steel plate and a high-speed photography and infrared imaging instrument, wherein the damage effect is shown in figure 5;
s6, evaluating the scattering integrity, scattering density and damage efficiency of the energetic micropellets through a ground static explosion test, wherein the test effect is shown in figure 6;
the results obtained by comprehensive theoretical calculation, numerical simulation and experimental verification show that the technical requirements can be completely met by the energy-containing micropellet damage cloud of the 5mm cylindrical composite structure.
Example 2
A preparation method of a composite structure energetic micropellet damage cloud comprises the following steps:
s1, selecting a high-activity core material and a high-strength shell material to perform integrated preparation of energy, mechanics and safety performance, so as to obtain an energetic micropill with a composite structure as a warhead fragment;
s2, preparing a warhead structure by adopting a method of combining gradient charge and spherical charge;
s3, selecting a 1.5mm aluminum alloy charging shell as a warhead bearing structure;
s4, selecting JHFL-1 explosive as warhead charge;
s5, selecting a warhead with the action height of 30km, the size of the energetic micropellet of 4mm cube, the scattering radius of 60m, the forming time of 0.35S and the effective dead time of 0.1S. The gradient throwing assembly is designed to have a maximum throwing speed of 178+/-10% m/s and a minimum throwing speed of 26.7+/-10% m/s, and the number of the energetic micropellets is calculated to be about 40.5 ten thousands. The energy-containing micropellets in the spherical throwing assembly are arranged on the surface in a spherical way, the spherical charge is arranged at the spherical center, the energy-containing micropellets are scattered in the spherical way after being thrown, the throwing speed is designed to be 30m/s, and the number of the energy-containing micropellets is calculated to be about 3 ten thousands.
The method for evaluating the damage cloud of the energetic micropellets of the composite structure comprises the following steps:
s1, when 0.35S is calculated by theory, the outer diameter of the energetic micropellet cloud cluster of the gradient throwing assembly reaches 60m, the inner radius is 9.3m, and the average spreading density is 37.1 pieces/m 2 The method comprises the steps of carrying out a first treatment on the surface of the At 0.45s, the external diameter of the cloud of the energetic micropellets reaches 76.2m, the internal radius is 11.9m, and the average spreading density is 23.0 pieces/m 2 。
Due to the blocking of the end frame, the cloud of energetic pellets of the spherical casting assembly spread the sphere with a cone angle of about 21 deg.. Therefore, at 0.35s, the sphere radius was 10.4m, the blind area projection radius was 1.9m, and the average spreading density was 36.5 pieces/m 2 The method comprises the steps of carrying out a first treatment on the surface of the At 0.45s, the sphere radius is 13.4m, the blind area projection radius is 2.4m, and the average spreading density is 22.1 pieces/m 2 ；
S2, randomly sampling the speed, direction and size of the energetic micropellets by adopting a Monte-Carlo simulation method, selecting a sector area with the size of about 1m multiplied by 1m as a statistical area, and counting out that the lowest average scattering density of the energetic micropellets in each area at 0.35S and 0.45S meets the design requirement;
s3, according to 100 Monte-Carlo simulations, calculating that the probability that each statistical region of the energetic micropill in the power radius at the moments of 0.35S and 0.45S meets the requirement of the scattering density is close to 1;
s4, through engineering calculation and numerical simulation, the technical scheme of the warhead of the energetic micropill is reasonable and feasible;
s5, evaluating the damage efficiency of the energetic micropellets through a 25mm ballistic gun, a 25mm resin plate and a high-speed photography and infrared imaging instrument;
s6, evaluating the throwing integrity, the scattering density and the damage efficiency of the energetic micropellets through a ground static explosion test;
the results obtained by comprehensive theoretical calculation, numerical simulation and experimental verification show that the technical requirements can be completely met by the energy-containing micropellet damage cloud of the 4mm cubic composite structure.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (4)

1. The preparation method of the energy-containing micropellet damage cloud with the composite structure is characterized by comprising the following steps of: the method comprises the following steps:
s1, selecting a high-activity core material and a high-strength shell material to perform integrated preparation of energy, mechanics and safety performance, so as to obtain an energetic micropill with a composite structure as a warhead fragment;
the high activity core material comprises aluminum/fluoropolymer, aluminum/fluoropolymer/tungsten, aluminum/active metal/fluoropolymer/tungsten, aluminum/hydride/fluoropolymer/tungsten, thermite/fluoropolymer/tungsten, aluminum/fluoropolymer/tungsten/nonmetallic compound; the high-strength shell material comprises an active alloy material, an active amorphous material and an active high-entropy alloy material; wherein, the high-activity core material is the core of composite construction, and the high-strength shell material is the shell of composite construction, and the thickness ratio of shell and core is 1:9~4:6, preparing a base material;
s2, adopting a large-speed gradient technology, a speed gradient homogenization technology and a multi-layer fragment driving control technology to prepare a warhead structure; specifically, a manner of combining gradient charge and spherical charge is adopted for preparing a warhead structure;
a gradient throwing assembly and a spherical throwing assembly are arranged in the energetic micropill warhead;
the gradient throwing assembly designs the warhead main body and the main charge into a taper shape so as to increase the difference between the highest throwing speed and the lowest throwing speed of the energetic micropellet; one end of the gradient throwing component is larger, the other end is smaller, and the larger end is connected with the end frame;
the spherical scattering component is positioned at the smaller end part of the gradient scattering component, and the middle of the spherical scattering component is provided with a partition board for separation;
the spherical throwing component is formed by arranging energetic micropellets on the surface of the spherical throwing component, and spherical charges are arranged at the center of the spherical throwing component and are scattered in a spherical shape after being thrown;
s3, selecting a charging shell as a warhead bearing structure;
s4, selecting an explosive with moderate explosion velocity as a warhead charge;
s5, selecting key parameters of the size of the warhead, the size of the energetic micropellets, the scattering density, the scattering radius, the throwing speed, the cloud forming time and the duration, and calculating the quantity and the quality of the energetic micropellets.
2. The method of claim 1, wherein the charge housing material comprises an aluminum alloy or an aluminum magnesium alloy.
3. The method for preparing the damage cloud of the composite-structure energetic micropellets of claim 1, wherein the moderate-detonation-velocity explosive comprises an HMX-based mixed explosive, an RDX-based mixed explosive and an ntu-based mixed explosive.
4. The method for preparing the damage cloud of the energetic micropellets with the composite structure according to claim 1, wherein the size of the energetic micropellets is 5mm or less, and the shape of the energetic micropellets is cylindrical, square or spherical.
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