Lightweight high-strength multilayer composite plate anti-explosion structure

Abstract

The utility model relates to an explosion protection structure technical field discloses a kind of lightweight high-strength multilayer composite panel blast-resistant structure, comprising: first metal composite board, energy-absorbing layer, metal framework and second metal composite board;First metal composite board includes first carbon fiber reinforced layer and first aluminum alloy plate, second metal composite board includes second carbon fiber reinforced layer and second aluminum alloy plate, metal framework is set between first aluminum alloy plate and second aluminum alloy plate, first carbon fiber reinforced layer is set to the side face of first aluminum alloy plate far from metal framework, second carbon fiber reinforced layer is set to the side face of second aluminum alloy plate far from metal framework, filling cavity is formed between metal framework and first aluminum alloy plate and second aluminum alloy plate, energy-absorbing layer is filled in each described filling cavity, and respectively with first aluminum alloy plate and / or second aluminum alloy plate connection.Adopt aluminum alloy plate and carbon fiber cloth combination, while reducing the surface density, promote tensile strength and anti-fragment ability.

Description

Technical Field

[0001] This utility model relates to the field of explosion protection structure technology, specifically a lightweight, high-strength multilayer composite board explosion-proof structure. Background Technology

[0002] In the field of blast-resistant technology, the current main protective structure is often made of ordinary carbon structural steel filled with cement. However, cement-filled blast-resistant structures suffer from problems such as high weight and inconvenient transportation and installation. Carbon structural steel with cement filling has low energy absorption efficiency for blast shock waves, resulting in high rebound energy. The high surface density of the material also makes it difficult to optimize the overall weight. Therefore, achieving lightweight design while ensuring blast resistance and fragmentation resistance is a pressing technical challenge that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to provide a lightweight, high-strength, multi-layer composite board explosion-proof structure to solve the problems in the background technology of using ordinary carbon structural steel + cement filler as explosion-proof structure, such as large weight, inconvenient transportation, and low energy absorption efficiency of shock waves.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A lightweight, high-strength, multi-layer composite explosion-proof structure includes: a first metal composite plate, an energy-absorbing layer, a metal skeleton, and a second metal composite plate. The first metal composite plate includes a first carbon fiber reinforcement layer and a first aluminum alloy plate. The second metal composite plate includes a second carbon fiber reinforcement layer and a second aluminum alloy plate. The first and second aluminum alloy plates are positioned opposite each other and spaced apart. The metal skeleton is located in the space between them. The first carbon fiber reinforcement layer is disposed on the side of the first aluminum alloy plate away from the metal skeleton, and the second carbon fiber reinforcement layer is disposed on the side of the second aluminum alloy plate away from the metal skeleton. A filling cavity is formed between the metal skeleton and the first and second aluminum alloy plates. The energy-absorbing layer fills each of the filling cavities and is connected to the first and / or second aluminum alloy plates respectively. Through the above arrangement, the first and second metal composite plates have identical structures. By combining aluminum alloy plates with carbon fiber cloth, the tensile strength and fragmentation resistance are improved while reducing the areal density. A metal skeleton is set between two aluminum alloy plates, forming a cavity between the metal skeleton and the first and second aluminum alloy plates. The energy-absorbing layer fills the cavity, and the synergistic effect of "energy dispersion - middle layer energy absorption - skeleton support" resists the impact of an explosion. The overall structure is stable, the metal skeleton effectively inhibits excessive deformation of the energy-absorbing layer and buckling of the composite plate, the interface bonding strength is high, and there is no risk of delamination.

[0006] Furthermore, the first metal composite plate also includes a third carbon fiber reinforcement layer, which is disposed on one side of the first aluminum alloy plate near the metal skeleton. The first metal composite plate and the reinforcement layer with the aluminum alloy plate as the core and the carbon fiber cloth on both sides can further improve tensile strength and fragmentation resistance while reducing the areal density.

[0007] Furthermore, the first carbon fiber reinforcement layer and the third carbon fiber reinforcement layer each comprise at least two layers of carbon fiber cloth. Carbon fiber cloth, as a high-performance composite material woven from carbon fiber filaments, possesses excellent properties such as lightweight, high strength, corrosion resistance, and fatigue resistance. By rationally setting the number of carbon fiber cloth layers, the overall structural weight is reduced while effectively improving the impact resistance of the main body.

[0008] Furthermore, the second metal composite plate also includes a fourth carbon fiber reinforcement layer, which is disposed on one side of the second aluminum alloy plate near the metal skeleton. The second metal composite plate, with an aluminum alloy plate as the core and carbon fiber cloth as the reinforcement layers on both sides, can further improve tensile strength and fragmentation resistance while reducing areal density.

[0009] Furthermore, the second and fourth carbon fiber reinforcement layers each comprise at least two layers of carbon fiber cloth. By rationally setting the number of carbon fiber cloth layers, the overall structural weight is reduced while effectively improving the impact resistance of the main body.

[0010] Furthermore, it also includes an adhesive layer, which connects the energy-absorbing layer to the metal frame and to the first and / or second metal composite plates. The adhesive layer has a certain degree of elasticity and toughness, which can absorb the impact energy generated by the explosion, reduce damage to the structure, and improve the stability of the interlayer structure.

[0011] Furthermore, the energy-absorbing layer is a foamed aluminum energy-absorbing layer. Foamed aluminum absorbs explosive energy and disperses shock waves through its porous structure, and has the characteristics of being lightweight, high-strength, and corrosion-resistant. Closed-cell foamed aluminum is selected with a porosity of 80% and a pore size of 2-4 mm. It absorbs explosive energy through compression deformation, reducing the intensity of shock waves. Its lightweight advantage effectively reduces the overall structural weight.

[0012] Furthermore, the metal skeleton includes multiple supporting ribs, which are evenly distributed between the first and second alloy plates to form multiple filling cavities. Through this structural design, the energy generated by the explosion can be effectively dispersed.

[0013] Furthermore, the cross-section of the supporting rib is I-shaped, further improving the supporting performance of the metal frame.

[0014] Furthermore, the metal frame is made of aluminum alloy. The metal frame provides a solid supporting foundation for the aluminum foam and the metal composite panels on both sides, allowing the aluminum foam to better perform its energy absorption, cushioning, and explosion-proof functions. At the same time, the rigidity of the metal frame also helps to limit the deformation and damage of the metal composite panels on both sides, improving the overall explosion-proof capability of the structure.

[0015] Furthermore, the metal frame is connected to the first metal composite plate and the second metal composite plate respectively by bolts. This arrangement improves the overall structural stability.

[0016] This invention has the following advantages over the prior art:

[0017] 1. This utility model discloses a lightweight, high-strength, multi-layer composite explosion-proof structure, comprising a first metal composite plate, an energy-absorbing layer, a metal skeleton, and a second metal composite plate. The first metal composite plate includes a first carbon fiber reinforcement layer and a first aluminum alloy plate, while the second metal composite plate includes a second carbon fiber reinforcement layer and a second aluminum alloy plate. The combination of the aluminum alloy plate and carbon fiber cloth reduces the areal density while increasing tensile strength and fragmentation resistance. The metal skeleton is located between the two aluminum alloy plates, forming a filling cavity between the metal skeleton and the first and second aluminum alloy plates. The energy-absorbing layer fills each cavity, exhibiting high energy absorption efficiency and significantly reducing the damage of shock waves to subsequent structures. The metal skeleton serves both structural support and load transfer, addressing the issues of excessive deformation and overall buckling of the energy-absorbing layer during energy absorption.

[0018] 2. The lightweight, high-strength, multi-layer composite explosion-proof structure of this utility model includes a first metal composite plate further comprising a third carbon fiber reinforcement layer, and a second metal composite plate further comprising a fourth carbon fiber reinforcement layer. Both the first and second metal composite plates use an aluminum alloy plate as the core and carbon fiber cloth as the reinforcing layers on both sides, which further enhances tensile strength and fragmentation resistance. The energy-absorbing layer is a foamed aluminum energy-absorbing layer, which has a high energy absorption ratio, significantly reducing the damage of the shock wave to subsequent structures. The overall structure adopts a symmetrical multi-layer structure of "carbon fiber aluminum alloy composite plate—foamed aluminum—carbon fiber aluminum alloy composite plate," achieving an explosion-proof mechanism of "dispersion—absorption—buffering" through the synergistic effect of material properties. Attached Figure Description

[0019] Figure 1 This is an exploded view of the lightweight, high-strength multilayer composite board explosion-proof structure in the embodiments of this utility model;

[0020] Figure 2 This is a cross-sectional view of the lightweight, high-strength multilayer composite board explosion-proof structure in the embodiment of this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0023] In the figure: 1. First metal composite plate; 101. First carbon fiber reinforcement layer; 102. First aluminum alloy plate; 103. Third carbon fiber reinforcement layer; 2. Energy absorption layer; 3. Metal skeleton; 301. Supporting rib; 4. Second metal composite plate; 401. Second carbon fiber reinforcement layer; 402. Second aluminum alloy plate; 403. Fourth carbon fiber reinforcement layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0028] Example:

[0029] To address the issues of excessive weight and poor synergy between blast resistance and energy absorption in existing blast-resistant structures, this invention provides a multi-layer composite blast-resistant structure consisting of a carbon fiber aluminum alloy composite plate, aluminum foam, and a carbon fiber aluminum alloy composite plate. It adopts a synergistic design concept of "energy dispersion—intermediate layer energy absorption—skeleton support," and the specific technical solution is as follows:

[0030] refer to Figures 1-4A lightweight, high-strength, multi-layer composite explosion-proof structure includes: a first metal composite plate 1, an energy-absorbing layer 1, a metal skeleton 3, and a second metal composite plate 4. The first metal composite plate 1 includes a first carbon fiber reinforcement layer 101 and a first aluminum alloy plate 102. The second metal composite plate 4 includes a second carbon fiber reinforcement layer 401 and a second aluminum alloy plate 402. The first aluminum alloy plate 102 and the second aluminum alloy plate 402 are opposite to each other and spaced apart. The metal skeleton 3 is located in the space between them. The first carbon fiber reinforcement layer 101 is disposed on the side of the first aluminum alloy plate 102 away from the metal skeleton 3. The second carbon fiber reinforcement layer 401 is disposed on the side of the second aluminum alloy plate 402 away from the metal skeleton 3. A filling cavity is formed between the metal skeleton 3, the first aluminum alloy plate 102, and the second aluminum alloy plate 402. The energy-absorbing layer 2 fills each of the filling cavities and is connected to the first aluminum alloy plate 102 and / or the second aluminum alloy plate 402, respectively.

[0031] In this embodiment, the first metal composite plate 1 and the second metal composite plate 2 have the same structure, using a combination of aluminum alloy plates and carbon fiber cloth. The aluminum alloy plates are lightweight and can improve impact resistance, effectively disperse explosion energy, and reduce local damage to the materials caused by the explosion impact. Carbon fiber cloth, as a high-performance composite material woven from carbon fiber filaments, has excellent properties such as lightweight, high strength, corrosion resistance, and fatigue resistance. The combination of aluminum alloy plates and carbon fiber cloth reduces the areal density while improving tensile strength and fragmentation resistance. A metal skeleton 3 is set between the two aluminum alloy plates, and a filling cavity is formed between the metal skeleton 3 and the first aluminum alloy plate 102 and the second aluminum alloy plate 402. The energy-absorbing layer 2 fills the filling cavity, and the synergistic effect of "energy dispersion - middle layer energy absorption - skeleton support" resists the explosion impact. The overall structure is stable, the metal skeleton 3 effectively inhibits excessive deformation of the energy-absorbing layer and buckling of the composite plate, the interface bonding strength is high, and there is no risk of delamination.

[0032] In implementation, the thickness of the first carbon fiber reinforcement layer 101 is 1–4 mm, for example: 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc., preferably 3 mm. The thickness of the first aluminum alloy plate 102 is 4–8 mm, for example: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, etc., preferably 6 mm. The thickness of the energy-absorbing layer is 80–140 mm, for example: 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, etc., preferably 100 mm. The thickness of the second carbon fiber reinforcement layer 401 is 1–4 mm, for example: 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, preferably 3 mm. The thickness of the second aluminum alloy plate 402 is 4–8 mm, for example: 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc., preferably 6 mm. By rationally setting the thickness of each layer of material, the overall structural weight can be reduced while ensuring explosion-proof and impact-resistant performance. The energy-absorbing layer can be bonded only to the first aluminum alloy plate 102, only to the second aluminum alloy plate 402, or to both the first and second aluminum alloy plates 102, depending on the specific circumstances.

[0033] Specifically, refer to Figure 1 , Figure 3 and Figure 4 The first metal composite plate 1 further includes a third carbon fiber reinforcement layer 103, which is disposed on the side of the first aluminum alloy plate 102 near the metal frame 3. The second metal composite plate 4 further includes a fourth carbon fiber reinforcement layer 403, which is disposed on the side of the second aluminum alloy plate 402 near the metal frame 3. The first metal composite plate 1 and the second metal composite plate 4 have the same structure, both using an aluminum alloy plate as the core and carbon fiber cloth as the reinforcement layers on both sides. While reducing the areal density, it can further improve the tensile strength and fragmentation resistance. The areal density is only 45% of that of traditional steel explosion-proof structures. By reasonably setting the number of carbon fiber cloth layers, the overall structural weight is reduced while effectively improving the impact resistance of the main body. Among them, the first carbon fiber reinforcement layer 101, the second carbon fiber reinforcement layer 401, the third carbon fiber reinforcement layer 103 and the fourth carbon fiber reinforcement layer 403 include at least two layers of carbon fiber cloth. For example, the above-mentioned carbon fiber reinforcement layer is composed of three layers of carbon fiber cloth, preferably by epoxy resin impregnation and molding, and its function is to resist the initial fragmentation impact and disperse local loads. The thickness of the third carbon fiber reinforcement layer 103 is 1-4 mm, for example: 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc., preferably 3 mm. The thickness of the fourth carbon fiber reinforcement layer 403 is 1-4 mm, for example: 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc., preferably 3 mm.

[0034] In this embodiment, an adhesive layer is also included. The energy-absorbing layer 2 is connected to the metal frame 3 and to the first metal composite plate 1 and / or the second metal composite plate 4 via the adhesive layer. By providing the adhesive layer, the stability of the energy-absorbing layer 2 is effectively improved. The adhesive layer has a certain degree of elasticity and toughness, which can absorb the impact energy generated by the explosion, reduce damage to the structure, and improve the stability of the interlayer structure. The adhesive layer uses commonly used adhesives, such as epoxy resin adhesives. For example, thicknesses of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.6mm, 1.8mm, 2mm, etc., are preferred to be 0.5mm.

[0035] Specifically, in this embodiment, the energy-absorbing layer 2 is a foamed aluminum energy-absorbing layer. Foamed aluminum absorbs explosive energy and disperses shock waves through its porous structure, and possesses characteristics such as lightweight, high strength, and corrosion resistance. Closed-cell foamed aluminum is selected, with a porosity of 80% and a pore size of 2-4 mm. It absorbs explosive energy through compression deformation, reducing the intensity of the shock wave. Its lightweight advantage effectively reduces the overall structural weight. In this embodiment, the foamed aluminum has a high porosity, enabling it to absorb a large amount of energy through plastic deformation under explosion or strong impact loads, thereby effectively attenuating the explosive shock wave and exhibiting excellent explosion-proof performance. The thickness of the foamed aluminum energy-absorbing layer is 10-100 mm. For example, 10 mm, 15 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, etc., with a preferred thickness of 50 mm.

[0036] refer to Figure 3 and Figure 4 The metal frame 3 is made of aluminum alloy. The metal frame provides a solid supporting foundation for the aluminum foam and the metal composite panels on both sides, allowing the aluminum foam to better perform its energy absorption, cushioning, and explosion-proof functions. At the same time, the rigidity of the metal frame 3 also helps to limit the deformation and damage of the metal composite panels on both sides, improving the overall explosion-proof capability of the structure.

[0037] Specifically, the metal skeleton 3 includes multiple supporting ribs, which are evenly distributed between the first metal composite plate 1 and the second metal composite plate 4 to form multiple filling cavities. The filling cavities are regular polygons, such as equilateral triangles, regular pentagons, regular hexagons, etc., preferably regular quadrilaterals. This structural design effectively disperses the energy generated by the explosion. The supporting ribs have an I-shaped cross-section, further improving the supporting performance of the metal skeleton 3. The supporting ribs are made of aluminum alloy I-shaped profiles, fixed between the two metal composite plates, serving to support, resist buckling, and transfer loads.

[0038] The metal frame 3 is connected to the first metal composite plate 1 and the second metal composite plate 4 by bolts. The installation process is as follows: the metal frame 3 is fixed to the first metal composite plate 1 by bolts, aluminum foam is bonded between the metal frame 3 and the first metal composite plate 1 by epoxy resin adhesive, and finally the second metal composite plate 4 is installed and tightened with bolts. Tightening the metal frame 3 with bolts can improve the overall structural stability.

[0039] In this embodiment, the lightweight, high-strength multilayer composite blast-resistant structure consists of aluminum alloy plates and carbon fiber composite plates on both sides, a foamed aluminum energy-absorbing layer in the middle, and an aluminum alloy metal skeleton. The overall structure is a symmetrical sandwich structure, and the various parts work together to achieve the blast-resistant function. The first metal composite plate 1 and the second metal composite plate 4 have the same structure. In use, either side can be selected as the blast-facing side and the other side as the blast-repellent side. For example, the first metal composite plate 1 is the blast-facing side and the second metal composite plate 4 is the blast-repellent side.

[0040] In practice:

[0041] It adopts a symmetrical multi-layer structure of "carbon fiber aluminum alloy composite plate - foamed aluminum - carbon fiber aluminum alloy composite plate" to achieve an explosion-proof mechanism of "dispersion - absorption - buffering" through the synergistic effect of material properties.

[0042] In this lightweight, high-strength, multi-layer composite explosion-proof structure, the first metal composite plate 1 serves as the blast-facing surface, and the second metal composite plate 4 serves as the blast-resistant surface. A metal skeleton is installed between them, forming a symmetrical sandwich structure. The cavity formed by the metal skeleton, the first aluminum alloy plate 102, and the second aluminum alloy plate 402 is filled with an energy-absorbing layer of aluminum foam. The first metal composite plate 1 and the second metal composite plate 4 have identical structures, using an aluminum alloy plate as the core material and wrapping three layers of carbon fiber cloth on each side, then bonding them together with epoxy resin impregnation. This ensures explosion-proof and impact-resistant performance while reducing overall weight. Aluminum foam has low density and high strength; its porous structure absorbs explosive energy, disperses shock waves, and is lightweight, significantly reducing the damage of shock waves to subsequent structures. The metal skeleton 3 provides structural support, disperses explosive energy, and enhances overall stability. Through these features, the areal density of this explosion-proof structure is only 45% of that of traditional steel explosion-proof structures, effectively reducing overall weight.

[0043] When faced with explosive energy, the blast-resistant layer (first metal composite plate) disperses the initial energy to the aluminum foam layer through high stiffness. The aluminum foam absorbs more than 70% of the energy through plastic collapse. The metal skeleton inhibits structural buckling and guides stress distribution. The back blast layer (second metal composite plate) blocks residual energy and fragments, forming an blast-resistant system.

[0044] This invention resists explosive impacts through the synergistic effect of "energy dispersion—intermediate layer energy absorption—skeleton support." The structure is stable, with an I-beam-shaped metal skeleton effectively suppressing excessive deformation of the aluminum foam and buckling of the metal composite panel. The interface bonding strength is high, eliminating the risk of delamination. The high energy absorption ratio of the aluminum foam significantly reduces the damage to subsequent structures caused by the shock wave.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight, high-strength, multi-layer composite board explosion-proof structure, characterized in that, include: A first metal composite plate, an energy-absorbing layer, a metal skeleton, and a second metal composite plate; the first metal composite plate includes a first carbon fiber reinforcement layer and a first aluminum alloy plate, the second metal composite plate includes a second carbon fiber reinforcement layer and a second aluminum alloy plate, the first aluminum alloy plate and the second aluminum alloy plate are opposite to each other and spaced apart, the metal skeleton is located in the space between them, the first carbon fiber reinforcement layer is disposed on the side of the first aluminum alloy plate away from the metal skeleton, the second carbon fiber reinforcement layer is disposed on the side of the second aluminum alloy plate away from the metal skeleton, the metal skeleton forms a filling cavity between the first aluminum alloy plate and the second aluminum alloy plate, the energy-absorbing layer fills each of the filling cavities and is respectively connected to the first aluminum alloy plate and / or the second aluminum alloy plate.

2. The lightweight, high-strength, multi-layer composite explosion-proof structure according to claim 1, characterized in that: The first metal composite plate also includes a third carbon fiber reinforcement layer, which is disposed on one side of the first aluminum alloy plate near the metal skeleton.

3. The lightweight, high-strength, multi-layer composite explosion-proof structure according to claim 2, characterized in that: The first carbon fiber reinforcement layer and the third carbon fiber reinforcement layer each comprise at least two layers of carbon fiber cloth.

4. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 1, characterized in that: The second metal composite plate also includes a fourth carbon fiber reinforcement layer, which is disposed on one side of the second aluminum alloy plate near the metal skeleton.

5. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 4, characterized in that: The second carbon fiber reinforcement layer and the fourth carbon fiber reinforcement layer each comprise at least two layers of carbon fiber cloth.

6. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 1, characterized in that: It also includes an adhesive layer, through which the energy-absorbing layer is connected to the metal frame and to the first metal composite plate and / or the second metal composite plate.

7. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 1, characterized in that: The energy-absorbing layer is a foamed aluminum energy-absorbing layer.

8. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 1, characterized in that: The metal skeleton includes multiple supporting ribs, which are evenly distributed between the first alloy plate and the second alloy plate to form multiple filling cavities.

9. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 8, characterized in that: The cross-section of the supporting rib is I-shaped.

10. The lightweight, high-strength multilayer composite explosion-proof structure according to claim 1, characterized in that: The metal frame is made of aluminum alloy.

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