CN112595172A - Strong electromagnetic pulse protection method for composite material launching canister - Google Patents
Strong electromagnetic pulse protection method for composite material launching canister Download PDFInfo
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- CN112595172A CN112595172A CN202110006464.3A CN202110006464A CN112595172A CN 112595172 A CN112595172 A CN 112595172A CN 202110006464 A CN202110006464 A CN 202110006464A CN 112595172 A CN112595172 A CN 112595172A
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- composite material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of emission tube electromagnetic protection, in particular to a strong electromagnetic pulse protection method for a composite emission tube. The protection method comprises two parts, namely cylinder structure shielding reinforcement and cylinder orifice gap protection, wherein the cylinder structure comprises a substrate made of carbon fiber materials, and a sandwich layer and an outer skin layer which are sequentially laid outside the substrate, the outer skin layer comprises carbon fiber and a perforated wire mesh, the wire mesh is at least provided with two layers and a space is arranged between the two layers of wire mesh, the cylinder orifice gap protection comprises sealing parts which are respectively arranged on the front end surface and the rear end surface of the cylinder and the opening position of the cylinder, the sealing parts are made of nickel-plated carbon fiber materials, and good electric connection is guaranteed. The invention has the advantages of ingenious design and novel conception, fundamentally solves the problems of low electromagnetic protection capability and scattered protection measures of the composite material launching tube, comprehensively realizes the strong electromagnetic interference resistance of the composite material launching tube, and is suitable for wide popularization.
Description
Technical Field
The invention relates to the technical field of emission tube electromagnetic protection, in particular to a strong electromagnetic pulse protection method for a composite emission tube.
Background
Along with the wide application of various high technologies in the military field, the power of various electromagnetic radiators such as radars, communication, navigation and other radiation sources is getting larger and larger, the number of the radiation sources is multiplied, the frequency spectrum is getting wider and wider, and in addition, the electromagnetic environment of a battlefield is getting worse and worse due to the appearance of electromagnetic energy weapons such as strong electromagnetic radiation jammers, high-power microwaves, electromagnetic pulses and the like. The high-power electromagnetic environment can cause different hazards such as missile interference, damage and the like, and the operational efficiency of the missile is seriously influenced.
In the prior art, the design improvement of a composite material launching tube usually does not involve an evaluation step, the weak point of electromagnetic protection of the launching tube cannot be improved in a quantitative mode, and meanwhile, the overall improvement is not carried out, for example, the electromagnetic protection design of the positions of a front end frame, a rear end frame, an opening and the like of the launching tube is not carried out, so that the overall electromagnetic protection capability of the launching tube is low, and the normal work of a projectile body in the processes of storage, transportation and launching cannot be effectively guaranteed.
There is a need to solve the above technical problems.
Disclosure of Invention
Aiming at the technical problems, the invention redesigns the shielding material layer and the structure of the missile launcher by combining the electromagnetic coupling characteristic simulation technology of the composite material launcher, the electromagnetic enhancement type process technology of the composite material and the electromagnetic pulse protection technology of the launcher, integrally improves the integral electromagnetic protection capability of the missile launcher, and ensures the normal work of a missile body in the processes of storage, transportation and launching, and the technical scheme adopted by the invention is as follows:
the utility model provides a strong electromagnetic pulse protection method of combined material launching tube, the launching tube includes the lid that barrel, barrel front end are connected and the mounting base of barrel rear end, and protection method includes barrel structure shielding reinforcing and barrel drill way gap protection two parts, and barrel structure includes the base that uses carbon fiber material to make and sandwich layer and outer skin layer laid in proper order outside the base, and outer skin layer includes carbon fiber and foraminiferous wire mesh, and wire mesh is provided with the interval at least between two-layer and the two-layer wire mesh, barrel drill way gap protection sets up the seal respectively with barrel open position on including barrel front and back both sides terminal surface, the seal is nickel-plated carbon fiber material, guarantees good electricity and connects.
Preferably, the sandwich layer is polyurethane foam.
Preferably, the outer skin layer is made of pure carbon fiber materials, a metal nickel net and nickel-plated carbon fiber materials, and the two outermost layers are made of pure carbon fibers.
Preferably, the distance between the two layers of the metal nickel net ranges from 3mm plus or minus 0.5mm, and the distance between the two layers of the nickel-plated carbon fiber ranges from 3mm plus or minus 0.5 mm.
Preferably, an annular groove is formed in the closed portion, shielding paint is coated in the annular groove, and a D-shaped conductive rubber strip is arranged in the annular groove.
Preferably, the cylinder and the mounting base are connected through a bolt, and conductive adhesive is coated before the bolt is mounted.
Preferably, the rear end of the cylinder body is provided with an end frame at a position close to the mounting base, the end frame is connected to the cylinder body through a pin, conductive adhesive is coated before the pin is mounted, and the conductive adhesive is guaranteed to be tightly filled in a gap between the pin and a pin hole.
Preferably, a round opening is formed in the cylinder, the metal connecting piece is connected from the outside, and the opening is made of a nickel-plated carbon fiber material, so that good electric connection is guaranteed.
Preferably, the round opening is provided with a mounting flange, the flange frame is pressed with a conductive rubber gasket, and the contact surface is coated with shielding paint.
Preferably, the barrel is provided with a square opening, the metal connecting piece is connected from the inside, and the opening is made of a nickel-plated carbon fiber material, so that good electric connection is guaranteed.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention starts from the requirements of electromagnetic protection of the launching tube and environmental adaptability, improves the electromagnetic protection capability of the missile launching tube as a whole by improving the structure of the launching main body and the protection of the aperture gap of the tube body, and ensures that the missile body normally works in the processes of storage, transportation and launching.
2. The invention improves the main structure of the launch, and adopts the metal nickel net and the nickel-plated fiber net to carry out iterative laying by carrying out material and layer laying design on the outer skin of the launch canister, thereby effectively improving the electromagnetic protection performance of the composite launch canister and simultaneously realizing the purposes of weight reduction, heat insulation, moisture protection and salt fog prevention.
3. According to the invention, the orifice gap of the composite material launch barrel is redesigned, the front end surface and the rear end surface of the launch barrel are provided with the concave grooves and are provided with the conductive rubber materials to ensure electric connection, the square opening and the circular opening on the barrel body of the launch barrel are respectively prepared by nickel-plated carbon fiber materials, the protection measures are integrally cooperated, and the electromagnetic protection capability is further improved.
In conclusion, the invention has the advantages of ingenious design and novel concept, fundamentally solves the problems of low electromagnetic protection capability and scattered protection measures of the composite material launching tube, comprehensively realizes the strong electromagnetic interference resistance of the composite material launching tube, and is suitable for wide popularization.
Drawings
FIG. 1 is a general design diagram of the present invention for protecting the composite material launch canister against strong electromagnetic pulses;
FIG. 2 is a schematic view of the structural design of the cartridge of the present invention;
FIG. 3 is a schematic diagram of the electromagnetic shielding design structure of the front end frame of the present invention;
FIG. 4 is a schematic structural view of the electromagnetic shielding design of the back end frame and the back end frame pin of the present invention;
FIG. 5 is a structural diagram of the electromagnetic protection design of the cylindrical body of the launch barrel in the circular hole;
FIG. 6 is a schematic diagram of the electromagnetic protection design structure at the square opening of the barrel of the launch barrel according to the present invention;
in the figure: 1 is a substrate, 2 is a sandwich layer, 3 is an outer skin layer, 4 is a closed part, 5 is a D-shaped conductive rubber strip, 6 is an end frame, 7 is a mounting flange, and 8 is a conductive rubber gasket.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the actual requirements of weight reduction of the existing missile launcher and electromagnetic protection capability under strong electromagnetic environment, the invention applies the chassis electromagnetic coupling characteristic simulation analysis technology to find electromagnetic protection weak links in the design stage and carry out strong electromagnetic protection design of the system by aiming at the problems that the existing composite material launcher has no system protection measures and has lower protection indexes when solving the electromagnetic interference problem, and the overall design of strong electromagnetic pulse protection of the composite material launcher is shown in figure 1.
The invention provides a strong electromagnetic pulse protection method for a composite material launch canister, wherein the launch canister comprises a canister body, a cover body connected with the front end of the canister body and a mounting base at the rear end of the canister body, in the strong electromagnetic pulse protection design process of the launch canister, the continuity of a shielding layer, the environmental adaptability of a protection material and the influence on other performances of a system are always considered, and the protection design is specifically divided into the following two categories:
(1) the shielding enhancement of the launching tube body is realized, and the shielding enhancement comprises material selection and layer laying design of a shielding layer.
(2) Various necessary hole opening and gap protection on the launching tube are achieved, and the hole opening and gap protection comprises front and rear end frame protection, temperature adjusting opening protection, opening protection and component fixing hole protection.
The electromagnetic protection performance of the composite material launching tube is integrally improved through the protection design, and the purposes of weight reduction, heat insulation, moisture prevention and salt mist prevention are achieved.
Aiming at the composite material launch canister, the launch canister electromagnetic protection efficiency simulation calculation under strong electromagnetic environment (nuclear electromagnetic pulse, thunder pulse and continuous wave electromagnetic environment) is carried out by a time domain finite integral electromagnetic simulation method. The electromagnetic coupling path of the composite material launching tube is innovatively determined by an electromagnetic simulation means, the effectiveness of the electromagnetic protection measure to be taken by the launching tube is pre-estimated by modeling simulation, and whether the electromagnetic interference path and the electromagnetic protection measure are effective or not can be pre-judged by a strong electromagnetic pulse protection simulation design technology of the composite material launching tube, so that the electromagnetic protection shielding design and the electric continuity design of the launching tube are guided, the accurate structural design is realized, the cost and the time are saved, and the design efficiency is improved.
Electromagnetic protection design of emission cylinder
(1) Barrel shield layer material design
On the basis of electromagnetic simulation design and analysis, the electromagnetic protection of the cylinder body adopts an interlayer electromagnetic enhancement scheme, namely a metal wire mesh material with holes is used as an electromagnetic enhancement material, so that the bonding force between layers of the enhancement material is improved, the cylinder body can also be used as a certain structure in a lap joint in a special-shaped structure, and the electromagnetic shielding efficiency can be improved.
The layer of the main body part of the emission cylinder adopts a metal nickel net as an electromagnetic reinforcing material; the layer of the peripheral area of the opening position adopts nickel-plated carbon fiber cloth which is subjected to strengthening treatment 12K and is 300g/m2 as a low-frequency electromagnetic reinforcing material, and a metal nickel net is matched to be used as a conductive leading-out layer and a supplementary layer. The nickel-plated carbon fiber cloth can ensure that the electrical property is improved, meanwhile, the material can still be manufactured according to the traditional composite material forming process, and the metal nickel mesh can ensure higher interlayer bonding force in the laying layer.
The design scheme of the shielding material of the emission cylinder is shown in the table 1;
the shielding material performance parameters are shown in table 2.
TABLE 1 launch canister shield design
TABLE 2 Shielding Material Performance parameters
(2) Barrel shielding laying layer design
The electromagnetic simulation calculation result shows that different distances of the metal nickel net have certain influence on the electromagnetic shielding performance. Theoretical analysis is combined to obtain that the shielding effectiveness of the sandwich structure with the space is obviously superior to that of a double-layer structure without the space, and 30% -50% of shielding effectiveness improvement can be realized when the space reaches 3mm +/-0.5 mm by considering the design size limit of the whole launching tube, so that the time distance of the designed layer structure meets the range of 3mm +/-0.5 mm.
The wall structure of the launching tube is divided into three parts: the carbon fiber composite plate comprises a substrate 1 made of carbon fiber materials, and a sandwich layer 2 and an outer skin layer 3 which are sequentially paved on the outer side of the substrate 1, wherein the outer skin layer comprises carbon fiber and a perforated metal wire mesh, the metal wire mesh is at least provided with two layers, and a space is arranged between the two layers of metal wire mesh;
as a preferable example, the main body material of the base body 1 in this embodiment uses pure carbon fiber, the core layer 2 is polyurethane foam, and the outer skin layer 3 has a structure of pure carbon fiber → metallic nickel mesh → nickel-plated carbon fiber → pure carbon fiber → nickel-plated carbon fiber → metallic nickel mesh → pure carbon fiber. Wherein the distance between the two layers of nickel nets is 3.64mm, the distance between the two layers of nickel-plated carbon fibers is 2.98mm, and the cylinder structure is shown in figure 2.
Electromagnetic protection design for front and rear end frames of launch canister
(1) Front end frame electromagnetic protection design
Referring to fig. 3, in order to ensure that the front frame surface has good electrical connection and ensure electromagnetic shielding effectiveness, a sealing part 4 is arranged in an annular area of the front end face, and the sealing part 4 is made of nickel-plated carbon fiber and is tightly and electrically connected with the base body and the outer skin shielding layer. In order to ensure the conductive continuity of the front end frame surface and the cover plate, the front end surface adopts a groove structure design, the groove is used for installing a D-shaped conductive rubber strip 5, in order to further improve the conductive continuity, a shielding coating is coated at the position of the groove for installing the conductive rubber strip,
the performance parameters of the D-type conductive rubber strip are shown in the table 3.
TABLE 3D type conductive rubber strip Performance parameters
(2) Rear end frame electromagnetic protection design GJB150.4A-2009
Referring to fig. 4, in order to ensure good electrical connection of the rear end frame surface and ensure electromagnetic shielding effectiveness, nickel-plated carbon fibers are adopted in the rear end surface area, so that the nickel-plated carbon fibers are closely and electrically connected with the inner and outer skin shielding layers. The rear end frame face and the barrel base are fastened through bolts, and conductive adhesive is coated before the bolts are installed.
In order to ensure the conductive continuity of the rear end frame surface and the barrel base, the rear end surface adopts a groove structure design, and the groove is used for installing a D-shaped conductive rubber strip; in order to further improve the conductive continuity, a shielding paint is coated at the position of the groove for installing the conductive rubber strip.
The rear end frame is connected with the cylinder through a pin, and conductive adhesive is coated before the pin is installed, so that the gap between the pin and a pin hole is ensured to be tightly filled with the conductive adhesive.
4-opening electromagnetic protection design
The openings of the cylinder body are in the form of round and square interfaces. The round interface is connected with a metal connecting piece from the outside, and a metal adapter plate is designed to provide a connecting platform; the square interface is connected with the metal piece from the inside, and the adapter plate is arranged to provide a connecting platform.
In order to ensure good electric connection of the hole opening part of the cylinder and ensure the electromagnetic shielding efficiency, the hole opening part adopts pure nickel-plated fiber to be tightly and electrically connected with the inner skin shielding layer and the outer skin shielding layer. The method comprises the steps of coating shielding paint on the surface of an electric connection part at the position of a hole opening, arranging an installation flange for facilitating assembly, pressing a conductive rubber gasket on a metal flange frame, coating the shielding paint on a contact surface, and designing the electromagnetic protection of a round interface as shown in figure 5 and the electromagnetic protection of a square interface as shown in figure 6.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (10)
1. The strong electromagnetic pulse protection method for the composite material launch canister comprises a canister body, a cover body connected with the front end of the canister body and a mounting base connected with the rear end of the canister body, and is characterized in that: the protection method comprises a barrel structure shielding reinforcement part and a barrel orifice gap protection part, wherein the barrel structure comprises a base (1) made of carbon fiber materials, and a sandwich layer (2) and an outer skin layer (3) which are sequentially laid outside the base (1), the outer skin layer comprises carbon fiber and a perforated metal wire mesh, the metal wire mesh is at least provided with two layers and a space is arranged between the two layers of metal wire meshes, the barrel orifice gap protection part comprises a barrel body, the front end face and the rear end face of the barrel body are respectively provided with a sealing part (4) with an opening position of the barrel body, and the sealing parts (4) are made of nickel-plated carbon fiber materials, so that good electric connection.
2. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: the sandwich layer (2) is made of polyurethane foam plastic.
3. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: the outer skin layer (3) is made of pure carbon fiber materials, a metal nickel net and nickel-plated carbon fiber materials, and the pure carbon fiber materials are laid in an iterative mode in sequence, and the two outermost layers of materials are made of pure carbon fibers.
4. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 3, characterized in that: the distance between the two layers of metal nickel nets is 3mm +/-0.5 mm, and the distance between the two layers of nickel-plated carbon fibers is 3mm +/-0.5 mm.
5. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: an annular groove is formed in the closed portion (4), shielding paint is coated in the annular groove, and a D-shaped conductive rubber strip (5) is arranged in the annular groove.
6. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: the barrel is connected with the mounting base through bolts, and conductive adhesive is coated before the bolts are mounted.
7. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 6, characterized in that: the rear end of barrel is provided with end frame (6) near the position of mounting base, end frame (6) are connected to the barrel through the pin, and the conducting resin should be coated earlier before the pin installation, guarantees that pin and pin hole clearance closely fill the conducting resin.
8. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: a round opening is formed in the cylinder body, a metal connecting piece is connected to the cylinder body from the outside, and the opening is made of nickel-plated carbon fiber materials, so that good electric connection is guaranteed.
9. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 8, characterized in that: a mounting flange (7) is arranged at the round opening, a conductive rubber gasket (8) is pressed on the flange frame, and shielding paint is coated on the contact surface.
10. The strong electromagnetic pulse protection method for the composite material launch canister according to claim 1, characterized in that: the barrel is provided with a square opening, the metal connecting piece is connected from the inside, and the opening is made of a nickel-plated carbon fiber material, so that good electric connection is guaranteed.
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| CN111465304A (en) * | 2020-03-31 | 2020-07-28 | 中国电子科技集团公司第三十三研究所 | Carbon fiber composite material shielding case with integrated structure and preparation method thereof |
| CN111912292A (en) * | 2020-07-31 | 2020-11-10 | 西安方元明科技股份有限公司 | Bulletproof and composite structure integrated launch canister and preparation method thereof |
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2021
- 2021-01-05 CN CN202110006464.3A patent/CN112595172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120285738A1 (en) * | 2004-12-07 | 2012-11-15 | Paul Douglas Cochrane | Shielding Polymers Formed into Lattices Providing EMI Protection for Electronics Enclosures |
| CN205223076U (en) * | 2015-11-24 | 2016-05-11 | 溧阳二十八所系统装备有限公司 | Nickel plating carbon fiber plate with electromagnetic shielding performance |
| CN109156095A (en) * | 2016-05-30 | 2019-01-04 | 阿莫绿色技术有限公司 | Flexible electromagnetic wave shielding sheet and electronic equipment with it |
| CN107314707A (en) * | 2017-08-15 | 2017-11-03 | 精功（绍兴）复合材料有限公司 | Composite material missile launching canister and preparation method thereof |
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Application publication date: 20210402 |