A helicopter platform deck and its preparation method

Abstract

This invention provides a helicopter platform deck and its manufacturing method. The helicopter platform deck includes an upper skin and a lower skin, with a lightweight core material disposed between the upper and lower skins. The upper skin, lower skin, and lightweight core material are integrally molded by resin vacuum injection. The lightweight core material includes several spaced lightweight foams and lattice panels, with the lattice panels enhancing the vertical load-bearing capacity of the lightweight core material. This invention utilizes a composite material structure of the upper skin, lightweight core material, and lower skin. The upper and lower skins are made of flame-retardant materials, and the core material includes lightweight foam and lattice panels. This significantly reduces the weight of the helicopter platform deck while ensuring the core material's vertical load-bearing capacity, resulting in a helicopter platform deck with low weight, good weather resistance, and fire resistance. The helicopter platform deck structure provided by this invention is simple, easy to manufacture, and reduces the weight and production cost of the helicopter platform deck.

Description

Technical Field

[0001] This invention relates to the field of helicopter platform technology, and more specifically, to a helicopter platform deck and its manufacturing method. Background Technology

[0002] In existing technologies, helicopter platforms are mainly installed on marine engineering platforms, ships, and high-rise buildings to facilitate the take-off and landing of helicopters for the transfer of personnel and materials. The helicopter platform deck is generally installed on top of the marine engineering platform or ship, which significantly affects the center of gravity of the platform or ship, impacting operational safety. Therefore, the helicopter platform deck is highly sensitive to weight.

[0003] Currently, the main types of helicopter platform decks are made of steel and aluminum. These are constructed by welding hollow structural profiles, which are then laid onto a staggered frame. The deck (profiles) and frame are connected using bolts or other mechanical methods. Steel structures are relatively cheaper than aluminum structures, but they are heavier and have poor corrosion resistance, especially in marine environments. When the anti-corrosion paint is damaged, the corrosion rate of steel structures accelerates, severely impacting their service life and operational safety. Aluminum structures are lighter than steel structures and have better corrosion resistance, but their cost is significantly higher, and their high-temperature resistance is poor. In the event of a fire, aluminum structures will soften and collapse as the temperature rises. Summary of the Invention

[0004] The problem solved by this invention is that in the prior art, helicopter platform decks are made of steel or aluminum, both of which are heavy and have a significant impact on the center of gravity of marine engineering platforms or ships, affecting the safety of use. In addition, steel structures have poor corrosion resistance, and aluminum structures have poor high temperature resistance.

[0005] To address the aforementioned problems, this invention discloses a helicopter platform deck, comprising an upper skin and a lower skin, with a lightweight core material disposed between the upper and lower skins. The upper skin, lower skin, and lightweight core material are integrally molded by resin vacuum injection. The lightweight core material comprises a plurality of spaced lightweight foams and lattice panels, with the lattice panels used to enhance the load-bearing capacity of the lightweight core material in the vertical direction.

[0006] Since helicopter platform decks primarily bear bending loads, composite materials with a sandwich structure are used to fabricate them. Under bending, the upper and lower surfaces of the deck experience significant stress levels, while the core structure bears less load and experiences lower stress levels, thus requiring relatively lower load-bearing capacity. However, the planar compressive strength of the helicopter platform deck is consistent with that of the lightweight core material. If only lightweight foam is used in the core, the deck's compressive strength will be too low to meet the requirements for compressive surface loads on helicopter platform decks. By using lattice panels and lightweight foam interspersed to form a lattice reinforcement structure, the Z-axis load-bearing capacity of the sandwich structure can be significantly improved, thereby meeting the usage requirements of helicopter platform decks. This structure exhibits excellent mechanical properties, low weight, low cost, and good fire resistance, fully meeting the usage requirements of helicopter platform decks on marine engineering platforms or ships.

[0007] Furthermore, the lattice panel divides the lightweight core material into several lattice units. The upper and lower skins of each lattice unit have different thicknesses, differing by the thickness of one lattice panel. The upper skins of two adjacent lattice units have different thicknesses, differing by the thickness of one lattice panel. The lower skins of two adjacent lattice units have different thicknesses, differing by the thickness of one lattice panel. The sum of the upper and lower skin thicknesses in all lattice units is the same.

[0008] This setup allows for the use of materials identical to the upper and / or lower skin to be sequentially wound around the top and bottom of lightweight foams during production. For example, fiberglass or carbon fiber fabric can be used as the base material for forming the lattice panel. When setting the lattice panel between two adjacent lightweight foams, the base material first wraps around the upper surface of the first lightweight foam, then passes through the middle of the two lightweight foams, and wraps around the lower surface of the second lightweight foam. The structure between these two lightweight foams constitutes the lattice panel. The base material wound around the upper surface of the lightweight foam forms part of the upper skin, resulting in the upper skin thickness being greater than the lower skin thickness of the same lattice unit by the thickness of one lattice panel. Similarly, the base material wound around the lower surface of the lightweight foam forms part of the lower skin, resulting in the lower skin thickness being greater than the upper skin thickness of the same lattice unit by the thickness of one lattice panel. This setup allows the lattice panel to be generated by winding a single base material, avoiding the dispersed arrangement of the lattice panel, which facilitates the preparation of production materials and prevents the relative displacement of dispersed lattice panels between lightweight foams, thus avoiding the impact on production efficiency.

[0009] Furthermore, a fire-retardant coating is provided on the upper surface of the upper skin, and the fire-retardant coating is formed by applying an intumescent fire-retardant coating.

[0010] The fire-retardant coating can further improve the fire resistance of the helicopter platform deck. The intumescent fire-retardant coating expands and foams when the surface of the helicopter platform deck is heated, forming a heat insulation layer. This can effectively ensure that the mechanical properties of the lightweight foam in the upper skin and lightweight core material do not change due to temperature rise, significantly improving the safety of the helicopter platform deck in use.

[0011] Furthermore, the intumescent fire retardant coating is at least one of water-based acrylic intumescent fire retardant coating, solvent-based acrylic intumescent fire retardant coating, and solvent-free epoxy intumescent fire retardant coating.

[0012] The aforementioned fire-retardant coatings can effectively protect helicopter platform decks and improve their fire resistance.

[0013] Furthermore, an anti-slip and wear-resistant coating is provided on the upper surface of the fire-retardant coating.

[0014] The anti-slip and wear-resistant coating can increase the friction coefficient of the helicopter platform deck surface to meet the requirements of classification society standards, and can also effectively protect the fire-retardant coating from damage during the use of the helicopter platform deck, thereby ensuring the fire resistance performance of the product.

[0015] Furthermore, flow channels are provided on the upper and / or lower surfaces of the lightweight foam.

[0016] The design of the flow channel can, on the one hand, increase the flow rate of the resin during vacuum infusion, and on the other hand, enhance the bonding force between the upper and / or lower skin and the lightweight foam through the resin in the flow channel.

[0017] Furthermore, the guide channels are arranged in an alternating pattern.

[0018] This setup facilitates uniform resin infusion and flow, significantly improving the bonding strength between the lightweight foam and the upper and / or lower skin, and avoiding the cracking problems caused by adhesive bonding in the prior art.

[0019] Furthermore, the lattice board and the lightweight foam form a lattice reinforcement structure, which is one or more of the following: trapezoidal lattice reinforcement structure, angular lattice reinforcement structure, lattice lattice reinforcement structure, and vertical lattice reinforcement structure.

[0020] The trapezoidal, angular, lattice, and vertical grid shapes are all determined by the cross-sectional shape of the lightweight foam, and different load-bearing effects can be achieved through the above settings.

[0021] Furthermore, the resin is a flame-retardant epoxy resin and / or vinyl resin.

[0022] This feature can further enhance the product's fire resistance, thereby improving its safety during use.

[0023] This invention also discloses a method for preparing a helicopter platform deck, used to prepare the helicopter platform deck as described above, the method comprising:

[0024] Step S1: Clean the preparation platform;

[0025] Step S2: Lay a sealing film on the preparation platform;

[0026] Step S3: Lay the lower skin on the sealing membrane;

[0027] Step S4: Place lightweight foam and lattice panels on the lower skin to form a lightweight core material with a lattice-reinforced structure;

[0028] Step S5: Lay the skin on the lightweight core material;

[0029] Step S6: Install release cloth, flow guide net, steel mesh, air extraction pipe, and glue injection pipe on the upper skin;

[0030] Step S7: Wrap the prepared structure with a sealing film and evacuate it using a vacuum pump;

[0031] Step S8: Inject the prepared resin through the dispensing tube;

[0032] Step S9: Demolding;

[0033] Step S10: Complete the preparation.

[0034] Through the above steps, a lightweight, weather-resistant, and fire-resistant helicopter platform deck with low production cost can be produced, meeting the usage requirements of helicopter platform decks on marine engineering platforms or ships.

[0035] Compared with existing technologies, the helicopter platform deck and its manufacturing method described in this invention have the following advantages:

[0036] This invention utilizes a composite material structure consisting of an upper skin, a lightweight core material, and a lower skin. The upper and lower skins are made of flame-retardant materials, while the core material comprises lightweight foam and lattice panels. This significantly reduces the weight of the helicopter platform deck while ensuring the core material's vertical load-bearing capacity. Consequently, the helicopter platform deck exhibits low weight, good weather resistance, and fire resistance, making it suitable for use on offshore engineering platforms or ships. The helicopter platform deck structure provided by this invention is simple and easy to manufacture, improving the weather resistance and fire resistance of the helicopter platform deck while reducing its weight and production costs. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional structural diagram of the helicopter platform deck according to an embodiment of the present invention;

[0039] Figure 2 This is a top view of the helicopter platform deck according to an embodiment of the present invention;

[0040] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the AA section;

[0041] Figure 4 This is a three-dimensional structural diagram of the lightweight foam described in an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Upper skin; 2. Lower skin; 3. Lightweight core material; 31. Lightweight foam; 311. Flow channel; 32. Grid panel; 4. Fireproof coating; 5. Anti-slip and wear-resistant coating. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0045] The following describes in detail, with reference to the accompanying drawings, an embodiment of the present invention: a helicopter platform deck and its preparation method.

[0046] Example 1

[0047] This embodiment provides a helicopter platform deck, such as Figures 1-3As shown, the system includes an upper skin 1 and a lower skin 2, with a lightweight core material 3 disposed between the upper skin 1 and the lower skin 2. The upper skin 1, lower skin 2, and lightweight core material 3 are integrally molded by resin vacuum injection. The lightweight core material 3 includes several spaced lightweight foams 31 and lattice plates 32, with the lattice plates 32 used to enhance the load-bearing capacity of the lightweight core material 3 in the vertical direction. Composite materials possess specific stiffness and specific strength unmatched by metallic materials, and also have advantages such as low weight, low price, and good weather resistance. Therefore, using composite materials to manufacture helicopter platform decks can significantly improve their performance and safety. Since helicopter platform decks primarily bear bending loads, this embodiment employs a sandwich-structure composite material to fabricate the deck. Under bending, the upper and lower surfaces of the deck experience significant stress levels, while the core structure bears less load and experiences lower stress levels, thus requiring relatively lower load-bearing capacity. However, the planar compressive strength of the helicopter platform deck is consistent with that of the lightweight core material 3. If only lightweight foam 31 is used in the core, the compressive strength of the helicopter platform deck will be too low, failing to meet the requirements for bearing compressive surface loads (Z-direction, i.e., vertical direction) on the helicopter platform deck. In this embodiment, a lattice reinforcement structure is formed by alternating lattice plates 32 and lightweight foam 31, which significantly improves the Z-direction load-bearing capacity of the sandwich structure, thereby meeting the usage requirements of helicopter platform decks. This structure exhibits excellent mechanical properties, low weight, low cost, and good fire resistance, fully meeting the usage requirements of helicopter platform decks on marine engineering platforms or ships.

[0048] In an embodiment of the present invention, the upper skin 1 and the lower skin 2 are made of glass fiber fabric or carbon fiber fabric. It should be noted that the material of the upper skin 1 can be the same as or different from that of the lower skin 2. Both glass fiber fabric and carbon fiber fabric have good flame-retardant properties, as well as excellent load-bearing capacity and corrosion resistance. Using glass fiber fabric or carbon fiber fabric as the material for the upper skin 1 and the lower skin 2 can significantly improve the fire resistance and corrosion resistance of the helicopter platform deck while meeting its load-bearing capacity requirements. In this embodiment, a three-layer sandwich structure of skin-core material-skin is adopted. The upper skin 1 and the lower skin 2 use glass fiber or carbon fiber reinforced composite materials to improve load-bearing capacity, and the core uses a lightweight foam 31 structure, so that the overall structure of the helicopter platform deck meets the bending load requirements and achieves a weight reduction effect.

[0049] As an optional embodiment, a fire-retardant coating 4 is provided on the upper surface of the upper skin 1. The fire-retardant coating 4 is formed by applying an intumescent fire-retardant coating. The fire-retardant coating 4 can further improve the fire resistance of the helicopter platform deck. Furthermore, the intumescent fire-retardant coating expands and foams when the helicopter platform deck surface is heated, forming a heat insulation layer. This effectively ensures that the mechanical properties of the lightweight foam 31 in the upper skin 1 and the lightweight core material 3 do not change due to temperature rise, significantly improving the safety of the helicopter platform deck. In some optional embodiments, the intumescent fire-retardant coating is at least one of water-based acrylic intumescent fire-retardant coating, solvent-based acrylic intumescent fire-retardant coating, and solvent-free epoxy intumescent fire-retardant coating. All of the above fire-retardant coatings can effectively protect the helicopter platform deck and improve its fire resistance.

[0050] In a preferred embodiment of the present invention, an anti-slip and wear-resistant coating 5 is provided on the upper surface of the fire-retardant coating 4. The anti-slip and wear-resistant coating 5 increases the coefficient of friction of the helicopter platform deck surface, meeting the requirements of classification society standards, and effectively protects the fire-retardant coating 4 from damage during use on the helicopter platform deck, thus ensuring the product's fire resistance. Alternatively, the anti-slip and wear-resistant coating 5 is formed from quartz sand and phenolic resin; optionally, the quartz sand is 50-80 mesh.

[0051] In one preferred embodiment, the lattice plate 32 divides the lightweight core material 3 into several lattice units. The upper skin 1 and lower skin 2 in each lattice unit have different thicknesses, differing by the thickness of one lattice plate 32. The upper skin 1 of two adjacent lattice units has different thicknesses, differing by the thickness of one lattice plate 32. The lower skin 2 of two adjacent lattice units has different thicknesses, differing by the thickness of one lattice plate 32. The sum of the thicknesses of the upper skin 1 and the lower skin 2 in all lattice units is the same. This arrangement allows for the use of materials identical to the upper skin 1 and / or lower skin 2 to be sequentially wrapped around the upper and lower lightweight foam 31 during production. For example, fiberglass fabric or carbon fiber fabric can be used as the base material for forming the lattice plate 32. When setting the lattice plate 32 between two adjacent lightweight foams 31, the base material first passes around the upper surface of the first lightweight foam 31, then through the middle of the two lightweight foams 31, and then around the lower surface of the second lightweight foam 31. The structure between these two lightweight foams 31 constitutes the lattice plate 32. The base material wrapped around the upper surface of the lightweight foam 31 forms... A portion of the upper skin 1 results in its thickness being greater than the thickness of the lower skin 2 within the same lattice unit by the thickness of a lattice plate 32. The base material wound around the lower surface of the lightweight foam 31 constitutes a portion of the lower skin 2, resulting in its thickness being greater than the thickness of the upper skin 1 within the same lattice unit by the thickness of a lattice plate 32. This arrangement allows the lattice plate 32 to be generated by winding a single base material, avoiding a dispersed arrangement of the lattice plate 32. This facilitates the preparation of production materials and prevents relative displacement of the dispersed lattice plate 32 between the lightweight foams 31, which could affect production efficiency. It should be understood that the lattice plate 32 is made of glass fiber fabric or carbon fiber fabric. Alternatively, the lattice plate 32 is formed by interlacing the parent material around the upper and lower surfaces of adjacent lightweight foams 31. The parent material wrapped around the upper surface of the lightweight foams 31 constitutes part of the upper skin 1, the parent material wrapped around the lower surface of the lightweight foams 31 constitutes part of the lower skin 2, and the parent material disposed between two adjacent lightweight foams 31 constitutes the lattice plate 32.

[0052] As one of the preferred embodiments, such as Figure 4 As shown, flow channels 311 are provided on the upper and / or lower surfaces of the lightweight foam 31. The flow channels 311 can increase the flow rate of the resin during vacuum infusion, and the resin in the flow channels 311 can enhance the bonding force between the upper skin 1 and / or the lower skin 2 and the lightweight foam 31.

[0053] As one example, such as Figure 4 As shown, the flow channels 311 are staggered. This arrangement facilitates uniform resin injection and flow, significantly improving the bonding strength between the lightweight foam 31 and the upper skin 1 and / or lower skin 2, and avoiding the cracking problem caused by adhesive bonding in the prior art.

[0054] In some optional embodiments, the width of the guide channel 311 is 1-3 mm and the depth is 1-3 mm. This size allows for improved vacuum injection efficiency while maintaining good adhesion between the lightweight foam 31 and the upper skin 1 and / or lower skin 2, ensuring the operational performance of the helicopter platform deck.

[0055] In this embodiment, the lattice plate 32 and the lightweight foam 31 form a lattice reinforcement structure. The lattice reinforcement structure is one or more of the following: trapezoidal lattice reinforcement structure, angular lattice reinforcement structure, lattice reinforcement structure, and vertical lattice reinforcement structure. The trapezoidal, angular, lattice, and vertical lattice shapes are all determined by the cross-sectional shape of the lightweight foam 31. Different load-bearing effects can be achieved through this arrangement.

[0056] Specifically, in the vertical lattice reinforcement structure, the spacing of the lattice plates 32 is 80-100mm.

[0057] In the trapezoidal lattice reinforcement structure, the spacing of the lattice plates 32 is 60-80mm, and the angle between the lattice plates 32 and the horizontal plane is 15°-45°.

[0058] In the angular lattice reinforcement structure, the angle between the lattice plate 32 and the horizontal plane is between 15° and 60°.

[0059] In this embodiment, the thickness of the lattice plate 32 is 2-4 mm.

[0060] As an embodiment of the present invention, the thickness of the helicopter platform deck is 100-150mm.

[0061] In a preferred embodiment, the resin is a flame-retardant epoxy resin and / or vinyl resin. This configuration can further enhance the fire resistance of the product, thereby improving its safety in use.

[0062] The glass fiber fabric can be E glass fiber fabric, high-modulus E glass fiber fabric, or S glass fiber fabric.

[0063] The weaving method of the glass fiber fabric or carbon fiber fabric can be one of the following: checkered weave, twill weave, satin weave, unidirectional weave, or multiaxial weave.

[0064] The lightweight foam 31 is one or more of PET foam, PVC foam, PU foam, PMI foam, and balsa wood.

[0065] Example 2

[0066] This embodiment discloses a method for preparing a helicopter platform deck, which is used to prepare a helicopter platform deck as described in Example 1.

[0067] The preparation method includes:

[0068] Step S1: Clean the preparation platform; ensure the preparation platform is flat and clean;

[0069] Step S2: Lay a sealing film on the preparation platform; the sealing film may be a polyester film;

[0070] Step S3: Lay the lower skin on the sealing membrane; the arrangement and number of layers of the upper skin can be the same as or different from the lower skin;

[0071] Step S4: Place lightweight foam and lattice panels on the lower skin to form a lightweight core material with a lattice-reinforced structure;

[0072] Step S5: Lay the skin on the lightweight core material;

[0073] Step S6: Install release cloth, flow guide net, steel mesh, air extraction pipe, and glue injection pipe on the upper skin;

[0074] Step S7: Wrap the prepared structure with a sealing film and evacuate it using a vacuum pump;

[0075] Step S8: Inject the prepared resin through the dispensing tube;

[0076] Step S9: Demolding;

[0077] Step S10: Complete the preparation.

[0078] Through the above steps, a lightweight, weather-resistant, and fire-resistant helicopter platform deck with low production cost can be produced, meeting the usage requirements of helicopter platform decks on marine engineering platforms or ships.

[0079] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "tail end," "head end," and "center," are only used to explain the relative positional relationships and connection situations between components in a specific state. They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A helicopter platform deck, characterized in that, It includes an upper skin (1) and a lower skin (2), and a lightweight core material (3) is provided between the upper skin (1) and the lower skin (2). The upper skin (1), the lower skin (2) and the lightweight core material (3) are integrally formed by resin vacuum injection. The lightweight core material (3) includes a plurality of spaced lightweight foams (31) and lattice plates (32). The lattice plates (32) are used to enhance the load-bearing capacity of the lightweight core material (3) in the vertical direction. The lattice plate (32) divides the lightweight core material (3) into several lattice units. The thickness of the upper skin (1) and the lower skin (2) in each lattice unit is different, differing by the thickness of one lattice plate (32). The thickness of the upper skin (1) of two adjacent lattice units is different, differing by the thickness of one lattice plate (32). The thickness of the lower skin (2) of two adjacent lattice units is different, differing by the thickness of one lattice plate (32). The sum of the thicknesses of the upper skin (1) and the lower skin (2) in all lattice units is the same. The thickness of the lattice plate (32) is 2-4 mm.

2. The helicopter platform deck as described in claim 1, characterized in that, A fire-retardant coating (4) is provided on the upper surface of the upper skin (1), and the fire-retardant coating (4) is formed by applying an intumescent fire-retardant coating.

3. The helicopter platform deck as described in claim 2, characterized in that, The intumescent fire retardant coating is at least one of water-based acrylic intumescent fire retardant coating, solvent-based acrylic intumescent fire retardant coating, and solvent-free epoxy intumescent fire retardant coating.

4. The helicopter platform deck as described in claim 2, characterized in that, An anti-slip and wear-resistant coating (5) is provided on the upper surface of the fireproof coating (4).

5. The helicopter platform deck as described in claim 1, characterized in that, A flow channel (311) is provided on the upper and / or lower surface of the lightweight foam (31).

6. The helicopter platform deck as described in claim 5, characterized in that, The guide channels (311) are arranged in an alternating pattern.

7. The helicopter platform deck as described in claim 1, characterized in that, The lattice plate (32) and the lightweight foam (31) form a lattice reinforcement structure, which is one or more of the following: trapezoidal lattice reinforcement structure, angular lattice reinforcement structure, lattice reinforcement structure, and vertical lattice reinforcement structure.

8. The helicopter platform deck as described in claim 1, characterized in that, The resin is a flame-retardant epoxy resin and / or vinyl resin.

9. A method for preparing a helicopter platform deck, characterized in that, The preparation method is used to prepare a helicopter platform deck as described in any one of claims 1-8, and the preparation method includes: Step S1: Clean the preparation platform; Step S2: Lay a sealing film on the preparation platform; Step S3: Lay the lower skin on the sealing membrane; Step S4: Place lightweight foam and lattice panels on the lower skin to form a lightweight core material with a lattice-reinforced structure; Step S5: Lay the skin on the lightweight core material; Step S6: Install release cloth, flow guide net, steel mesh, air extraction pipe, and glue injection pipe on the upper skin; Step S7: Wrap the prepared structure with a sealing film and evacuate it using a vacuum pump; Step S8: Inject the prepared resin through the dispensing tube; Step S9: Demolding; Step S10: Complete the preparation.

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