Method for enhancing constraint damping coating through honeycomb structure and construction technology

Abstract

The invention discloses a method for reinforcing a constrained damping coating through a honeycomb structure and a construction technology, and relates to the technical field of ship vibration and noise reduction. In the construction process of common damping paint, a selected honeycomb structure is embedded in an uncured damping coating, the embedding depth is controlled to not destroy the interface where the damping coating is tightly connected with a base body, and the damping coating is tightly bonded through the interaction of the vertical face of the honeycomb structure and the damping coating. The bottoms of the damping islands are continuous, the upper portions of the damping islands are separated by the honeycomb walls, the height of the honeycomb is controlled so that after the damping coating is completely dried, part of the honeycomb is still exposed out of the damping coating, and therefore an open type constraint structure is formed on the surface of the base body in situ. The open honeycomb structure avoids the problem that a traditional continuous restraint layer affects the drying time and the film forming strength of the damping layer. On the structure, restraint layer paint is further coated, and after the restraint layer is dried, a brand-new composite restraint damping coating is formed.

Description

Technical Field

[0001] This invention relates to the field of ship vibration reduction and noise reduction technology, specifically a method and construction process for reinforcing a confined damping coating with a honeycomb structure. Background Technology

[0002] During navigation, a ship's hull structure is subjected to various excitation sources such as the main engine, propeller, and waves, generating widespread vibration and noise. This vibration and noise not only reduces the comfort of crew and passengers and affects the normal operation of precision instruments, but also accelerates fatigue damage to the hull structure and may increase the ship's acoustic signature, posing a threat to the stealth of military vessels. Vibration and noise control in ship compartments, especially engine rooms and work areas, directly affects the working environment of personnel and the normal operation of equipment. Traditional methods for ship vibration reduction and noise reduction, besides structural optimization and the installation of floating raft vibration isolation systems, have made the installation of damping plates on bulkheads and decks an indispensable feature. However, damping plates are costly to manufacture, complex to install, and require significant space, and their damping performance needs further improvement. In recent years, the application of damping coatings as a substitute for damping plates in ship design and manufacturing has become increasingly widespread. As an effective vibration reduction and noise reduction technology, damping coatings have become the preferred solution for ship vibration and noise reduction due to their advantages such as simple construction, low cost, and the ability to be integrated with anti-corrosion coatings.

[0003] Typical free damping coatings (i.e. extended damping coatings) mainly contain elastic polymers and lamellar inorganic fillers. They dissipate energy through the coating body during tensile and compressive deformation. However, their loss factor (tanδ) is relatively limited, resulting in insufficient energy dissipation capacity and unsatisfactory vibration reduction effect, especially in the low-frequency range (<500Hz). Furthermore, they also suffer from insufficient mechanical properties and impact resistance.

[0004] Adding a constraint material to a free damping coating to form a constrained damping structure not only effectively improves the coating's mechanical properties and impact resistance but also represents a relatively efficient vibration reduction technology. It typically consists of three layers: a base layer (the structure being damped), a damping layer, and a constraint layer. When the base layer vibrates, the constraint layer, utilizing its high modulus (rigidity), restricts the lateral expansion and contraction of the damping layer. This restriction forces the intermediate damping layer to undergo strong shear deformation, rather than simple compressive or tensile deformation, thus efficiently converting mechanical energy into heat energy. This structure has a significantly higher loss factor than the free damping structure and is currently the primary method for ship damping coatings. However, traditional constrained damping structures typically employ prefabricated damping films and metal constraint plates, which have the following drawbacks: 1. Complex construction: It requires the pasting of damping films and the installation of heavy metal constraint layers by riveting or welding. It has poor adaptability to complex curved surfaces and involves a large amount of work.

[0005] 2. Heavy weight: The metal restraint layer significantly increases the ship's additional weight.

[0006] 3. High cost: Both material and installation costs are relatively high.

[0007] In recent years, in order to overcome the shortcomings of traditional constrained damping structures, many institutions have conducted extensive research and development work, such as: Patent CN201210435926.4 describes a method that increases the surface area of ​​the viscoelastic material subjected to shear deformation by perforating the damping layer, thereby consuming more vibration energy and improving vibration reduction. An additional sound-insulating coating is applied to the outside of the constraint layer to prevent excessive sound energy radiation from the outer surface of the rigid constraint layer. However, perforation leads to a decrease in the local strength of the damping layer, making it prone to fatigue cracks, especially under high-frequency vibrations, thus shortening its service life.

[0008] Patent CN201510874283.7 discloses a damping layer that is a two-component polyurethane system and a constraint layer that is a high-modulus two-component epoxy resin system. When used, the coating thickness is designed to be 1.5-2.5 times that of the substrate, which can obtain extremely high modulus (such as imitating metal). However, the surface is brittle and has a large difference in thermal expansion coefficient compared with the elastic damping layer, making it easy to peel off.

[0009] Patent CN201611228732.1 adds 15-30 parts by weight of glass fiber to the confinement layer coating to reinforce the confinement layer. It achieves extremely high in-plane modulus in a thin layer state, which greatly improves the efficiency of the confinement layer. However, fiber agglomeration is prone to occur during construction, and it is not easy to obtain a uniform confinement coating during spraying and scraping processes.

[0010] Patent CN202311229242.3 describes a method that involves laying U-shaped grooves on the surface of the damping layer before it dries, with the grooves arranged in a grid pattern. These grooves control the thickness of the coating and provide stress-relieving space for the applied coating, increasing its breathability and preventing blistering and cracking later. However, insufficient adhesion between the U-shaped grooves and the wet damping layer can lead to peeling or delamination later, weakening the structural integrity.

[0011] Patent CN202410079602.4 integrates particle damping technology into the design of constrained damping structures. By filling the cavity inside the constrained layer with damping particles, the mechanical energy of vibration is converted into heat energy and dissipated through the collision and friction between the damping particles, thus achieving a good vibration reduction and noise reduction effect. However, it requires precise machining of a closed cavity in the constrained layer to accommodate the particles and ensuring that no leakage occurs during long-term use. This technology has a complex manufacturing process and is expensive.

[0012] It is evident that there is an urgent need to improve the performance of marine confined damping coatings, especially in terms of damping performance with high loss factors and simple construction processes, where technological breakthroughs are urgently required. Summary of the Invention

[0013] The purpose of this invention is to provide a method and construction process for reinforcing a confined damping coating with a honeycomb structure, so as to solve the problems existing in the prior art.

[0014] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a constrained damping coating structure reinforced with a honeycomb structure, the coating structure comprising a primer disposed on a substrate, and a damping layer, a honeycomb structure, and a constrained layer sequentially covering the primer; wherein, The damping layer is formed by curing one of water-based damping coatings, oil-based damping coatings, or solvent-free damping coatings; The honeycomb structure is embedded in the uncured damping layer, while controlling the embedding depth; The constraint layer is formed by curing one of a single-component constraint coating, a two-component constraint coating, or a solvent-free constraint coating.

[0015] The damping coatings mentioned here are selected based on the actual requirements of the ship's designer and owner, including comprehensive performance such as shock absorption, corrosion protection, and flame retardancy, combined with coating costs and construction cost requirements. The damping coating can be a single-component coating system or a two-component coating system, and can be water-based, oil-based, or solvent-free.

[0016] Furthermore, the thickness of the damping coating is 2~10mm.

[0017] Furthermore, the honeycomb structure is a multi-cavity three-dimensional structure prepared by laminating and bonding thin film or foil materials, cutting them to the designed size, and then stretching them laterally, or a grid-like multi-cavity three-dimensional structure prepared by inserting strip-shaped thin layer materials.

[0018] Furthermore, the depth of the cavities in the honeycomb structure is the thickness of the resulting three-dimensional structure, and the shape of the cavities is one of hexagons, quadrilaterals, or triangles.

[0019] Furthermore, the honeycomb structure can be cut and assembled into three-dimensional corners, U-shaped long frames, and arcs and various bends according to the shape of the coating surface.

[0020] Furthermore, the length and width of the honeycomb structure are much greater than its thickness.

[0021] Furthermore, the material of the honeycomb structure is either metal or plastic.

[0022] Furthermore, the material of the honeycomb structure can be metal, including but not limited to aluminum, copper, stainless steel, etc., or plastic, including but not limited to PP, PE, PVC, nylon, aramid, aluminized PE, PET, etc.

[0023] Furthermore, the honeycomb structure is embedded into the honeycomb structure, exposing the damping coating by 0.5~5mm, preferably 1~4mm.

[0024] The embedding depth is controlled to avoid damaging the interface between the damping coating and the substrate. By utilizing the interaction between the vertical surface of the honeycomb structure and the damping coating, the damping coating is divided into numerous damping islands with continuous bottoms and separated by honeycomb walls at the top. The height of the honeycomb is controlled so that after the damping coating is fully dry, part of the honeycomb is still exposed outside the damping coating. In this way, an open constraint structure is formed in situ on the substrate surface. The open honeycomb structure avoids the problem of the drying time and film strength of the damping layer caused by the traditional continuous constraint layer.

[0025] Furthermore, a method for enhancing the constraint damping coating using a honeycomb structure includes the following preparation steps: (1) Preparation of the substrate surface: According to the ship design requirements, the surface of the hull structure that needs to be coated with the damping coating is treated, including rust removal, oil removal, and application of anti-rust primer. The hull structure referred to here is the cabin surface of the ship that needs to be coated with damping coating: including the floor, inner wall, bulkhead, outer wall of pipe, outer surface of support structure, outer shell surface of cabin facilities, etc. The damping coating is applied on the anti-rust primer. (2) When the damping coating is not cured, apply appropriate pressure to the honeycomb sheet with appropriate tools or palms to embed the sheet into the damping coating and control the embedding depth. At the corner of the cabin or the surface of a large curvature structure, the honeycomb structure sheet can be pre-cut into matching shapes and directly assembled. After drying, a modified damping coating is obtained. (3) A constraint coating is applied to the modified damping coating and cured to obtain a honeycomb structure reinforced constraint damping coating.

[0026] Furthermore, the method of using a honeycomb structure to enhance the constraint damping coating described above can be applied to vibration reduction and noise reduction in ship cabins, decks, rail transit carriages, and engineering machinery cabs.

[0027] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. High loss factor: Due to the introduction of an embedded honeycomb structure that bridges the damping coating and the constraint coating, and the formation of a large number of interconnected damping island structures divided by honeycomb walls in the damping coating, the long-range vibration of the damping layer is restricted in multiple dimensions when vibration occurs, forcing the damping layer to undergo shear deformation. Its energy dissipation efficiency is much higher than that of the tensile and compressive deformation of free damping. At the same time, the side length, thickness and embedding depth of the honeycomb structure also have an impact. The loss factor of this composite structure can reach above 0.3 in the frequency range of 100Hz-1000Hz, and it performs particularly well in the low frequency band below 200Hz.

[0028] 2. Excellent workability and adaptability: It can be used with coating application processes without the need for heavy prefabricated parts. It can easily handle the coating of ship cabin walls, corners, complex pipes, bulkheads and curved structures without affecting the curing time of the damping coating, and has high construction efficiency.

[0029] 3. Lightweight and high strength: The use of honeycomb structure material significantly reduces the added weight, and the constraint layer itself also has high wear resistance and impact resistance.

[0030] 4. Excellent interlayer bonding: The honeycomb structure provides an embedded bridging effect between the damping layer and the constraint layer, resulting in strong adhesion between them and effectively avoiding delamination problems that may occur with traditional adhesives. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the honeycomb structure embedded with the damping coating of the present invention. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The test methods for various indicators of the honeycomb structure-reinforced composite constraint damping coating samples prepared in the following embodiments are as follows: Loss factor: The loss factor of the honeycomb structure-enhanced composite constraint damping coating samples prepared in the examples and comparative examples was tested according to GB / T 18258-2000.

[0034] Bond strength: The bond strength of the honeycomb structure-reinforced composite constraint damping coating samples prepared in the examples and comparative examples was tested according to GB / T 23932-2009.

[0035] Salt spray test: The honeycomb structure-enhanced composite constraint damping coating samples prepared in the examples and comparative examples were subjected to salt spray test according to GB / T 10125-2021, neutral NSS. Example

[0036] (1) On the carbon steel sheet, grind to remove rust, wash with acetone, dry, and then spray a commercially available two-component zinc-rich epoxy primer (A) with a zinc content of 7%, cure at room temperature for 20 hours, and the film thickness is about 0.05 mm. (2) On the cured primer coating, a commercially available water-based single-component damping coating (B) with a solid content of 70% is applied by spraying. The main components include 20% modified acrylic resin, 30% mica powder, 15% heavy calcium carbonate, and 5% of additives including wetting agent, flame retardant, dispersant and coupling agent. The coating thickness is 4mm. (3) Lay an aluminum honeycomb sheet with a thickness of 4 mm on the wet coating, with a honeycomb side length of 3 mm and a honeycomb wall thickness (aluminum foil thickness) of 0.08 mm. Pass the sample horizontally through the roller coating equipment so that the honeycomb sheet is embedded in the damping coating by 3 mm. Dry at room temperature for 24 hours. (4) Apply a solvent-free two-component high-modulus epoxy topcoat (C) purchased from the market to the dried sample. The coating thickness is 6 mm. Cure at room temperature for 7 days to obtain a composite constraint damping coating sample with aluminum honeycomb structure reinforcement. Example

[0037] Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 5 mm, and a honeycomb wall thickness of 0.1 mm was used to replace the aluminum honeycomb sheet in Example 1 to prepare a constraint damping coating sample with aluminum honeycomb structure reinforcement. Example

[0038] The damping coating was prepared according to the steps in Example 1; A 4mm thick aramid honeycomb sheet with a honeycomb side length of 3.2mm and a honeycomb wall thickness of 0.025mm was laid on the wet coating. The sample was then passed horizontally through a roller coating equipment to embed the honeycomb sheet into the damping coating by 3mm. The sample was then dried at room temperature for 24 hours. The constraint coating was prepared according to the steps in Example 1 to obtain a constraint damping coating sample reinforced with aramid honeycomb structure. Example

[0039] The damping coating was prepared according to the steps in Example 1.

[0040] A 4mm thick PET honeycomb sheet with a honeycomb side length of 3mm and a honeycomb wall thickness of 0.1mm was laid on the wet coating. The sample was then passed horizontally through a roller coating machine to embed the honeycomb sheet into the damping coating by 3mm. The sample was then dried at room temperature for 24 hours.

[0041] The constraint coating was prepared according to the steps in Example 1 to obtain a PET honeycomb structure reinforced constraint damping coating sample. Example

[0042] (1) On the carbon steel sheet, grind to remove rust, wash with acetone, dry, and then spray a commercially available two-component zinc-rich epoxy primer (A) with a zinc content of 7%, cure at room temperature for 24 hours, and the film thickness is about 0.05 mm. (2) On the cured primer coating, a solvent-free two-component damping coating (D) purchased on the market is applied by spraying. The main components include 60% mixed isocyanate, 37% mica powder, 2% metal oxide pigment, and 1% of additives including wetting agent, flame retardant, dispersant and coupling agent. The coating thickness is 5mm. (3) Lay an aluminum honeycomb sheet with a thickness of 4 mm on the wet coating, with a honeycomb side length of 3 mm and a honeycomb wall thickness (aluminum foil thickness) of 0.08 mm. Pass the sample horizontally through the roller coating equipment so that the honeycomb sheet is embedded in the damping coating by 3 mm. Dry at room temperature for 20 hours. (4) Apply a solvent-free two-component high-modulus epoxy topcoat (C) purchased from the market to the dried sample. The coating thickness is 6 mm. Cure at room temperature for 20 hours to obtain a composite constraint damping coating sample with aluminum honeycomb structure reinforcement. Example

[0043] Following the steps of Example 5, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 5 mm, and a honeycomb wall thickness of 0.1 mm was used to replace the aluminum honeycomb sheet in Example 5 to prepare a constraint damping coating sample with aluminum honeycomb structure reinforcement. Example

[0044] The damping coating was prepared according to the steps in Example 5; A 4mm thick aramid honeycomb sheet with a honeycomb side length of 3.2mm and a honeycomb wall thickness of 0.025mm was laid on the wet coating. The sample was then passed horizontally through a roller coating machine to embed the honeycomb sheet into the damping coating by 3mm. The sample was then dried at room temperature for 20 hours. The constraint coating was prepared according to the steps in Example 5 to obtain a constraint damping coating sample reinforced with aramid honeycomb structure. Example

[0045] The damping coating was prepared according to the steps in Example 5; A 4mm thick PET honeycomb sheet with a honeycomb side length of 3mm and a honeycomb wall thickness of 0.1mm was laid on the wet coating. The sample was then passed horizontally through a roller coating machine to embed the honeycomb sheet into the damping coating by 3mm. The sample was then dried at room temperature for 20 hours. The constraint coating was prepared according to the steps in Example 5 to obtain a PET honeycomb structure reinforced constraint damping coating sample. Example

[0046] On the carbon steel sheet, after grinding to remove rust, washing with acetone, and drying, a commercially available two-component zinc-rich epoxy primer (A) with a zinc content of 7% is sprayed on. It is cured at room temperature for 20 hours, and the film thickness is approximately 0.05 mm. On the cured primer coating, a commercially available water-based single-component damping coating (B) is applied by spraying. The coating has a solid content of 70% and its main components include 20% modified acrylic resin, 30% mica powder, 15% heavy calcium carbonate, and 5% additives including wetting agent, flame retardant, dispersant and coupling agent. The coating thickness is 4mm. A commercially available solvent-free two-component high-modulus epoxy topcoat (C) was applied to the dried sample. The coating thickness was 6 mm, and the coating was cured at room temperature for 7 days to obtain a water-based constrained damping coating sample. Example

[0047] On the carbon steel sheet, after grinding to remove rust, washing with acetone, and drying, apply a commercially available two-component zinc-rich epoxy primer (A) with a zinc content of 7% by spraying. It is cured at room temperature for 24 hours, and the film thickness is approximately 0.05 mm. On the cured primer coating, a commercially available solvent-free two-component damping coating (D) is sprayed. The main components include 60% mixed isocyanate, 37% mica powder, 2% metal oxide pigment, and 1% of additives including wetting agent, flame retardant, dispersant and coupling agent. The coating thickness is 5 mm. A solvent-free two-component high-modulus epoxy topcoat (C) purchased from the market was scraped onto the dried sample and cured at room temperature for 20 hours to obtain a 6 mm thick coating sample with a solvent-free constrained damping coating.

[0048] Comparative Example 1 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 2 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1 to prepare a constraint damping coating sample with aluminum honeycomb structure reinforcement.

[0049] Comparative Example 2 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 8 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1 to prepare a constraint damping coating sample with aluminum honeycomb structure reinforcement.

[0050] Comparative Example 3 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 2 mm, a honeycomb side length of 3 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1, and the honeycomb sheet was embedded with a damping coating of 1 mm to prepare a sample of aluminum honeycomb structure reinforced by constraint damping coating.

[0051] Comparative Example 4 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 5 mm, a honeycomb side length of 3 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1, and the honeycomb sheet was embedded with a damping coating of 4 mm to prepare a sample of aluminum honeycomb structure reinforced by constraint damping coating.

[0052] Comparative Example 5 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 3 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1, and the honeycomb sheet was embedded with a damping coating of 1 mm to prepare a sample of aluminum honeycomb structure reinforced by constraint damping coating.

[0053] Comparative Example 6 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 3 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1, and the honeycomb sheet was embedded with a damping coating of 2 mm to prepare a sample of aluminum honeycomb structure reinforced by constraint damping coating.

[0054] Comparative Example 7 Following the steps of Example 1, an aluminum honeycomb sheet with a thickness of 4 mm, a honeycomb side length of 3 mm, and a honeycomb wall thickness of 0.08 mm was used to replace the aluminum honeycomb sheet in Example 1, and the honeycomb sheet was embedded with a damping coating of 4 mm to prepare a sample of aluminum honeycomb structure reinforced by constraint damping coating.

[0055] Example of effect Table 1 below presents the performance analysis results of the constrained damping coating samples reinforced with honeycomb structures according to Examples 1 to 10 and Comparative Examples 1 to 7 of the present invention.

[0056] Table 1

[0057] A comparison of the experimental data from Example 1 and Comparative Examples 1-2 reveals that the side length of the honeycomb sheet used in this invention affects the performance of the sample. When using a honeycomb sheet with an excessively long side length, the effective shear deformation triggering efficiency is low, reducing energy dissipation efficiency and thus lowering product performance. Conversely, when using a honeycomb sheet with an excessively short side length, the honeycomb wall causes the damping coating and constraint coating to be too fragmented, resulting in decreased interfacial adhesion. During vibration, delamination is prone to occur, damaging the integrity of the bridging structure and weakening the shear deformation transmission efficiency, thereby reducing sample performance.

[0058] A comparison of the experimental data from Example 1 and Comparative Examples 3-4 reveals that the thickness of the honeycomb sheet used in this invention affects the performance of the sample. Using an excessively thick honeycomb sheet will result in excessively high bending stiffness of the sample, leading to an upward shift in the overall modal frequency and a reduction in the vibration damping effect. Using an excessively thin honeycomb sheet makes it difficult to form a uniform embedding surface during construction. Compared with uniform embedding, the overall constraint damping structure strength is reduced, thereby reducing the performance of the sample.

[0059] A comparison of the experimental data from Example 1 and Comparative Examples 5-7 reveals that the embedding depth of the honeycomb sheet used in this invention has a significant impact on the performance of the sample. When the embedding depth is too low or too high, the bonding performance will be affected due to insufficient anchoring strength, thereby reducing the damping performance.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A constrained damping coating structure reinforced with a honeycomb structure, characterized in that, The coating structure includes a primer on a substrate, and a damping layer, a honeycomb structure, and a restraint layer sequentially covered on the primer; wherein the damping layer is cured from one of water-based damping coating, oil-based damping coating, or solvent-free damping coating. The honeycomb structure is embedded in the uncured damping layer, while controlling the embedding depth; The constraint layer is formed by curing one of a single-component constraint coating, a two-component constraint coating, or a solvent-free constraint coating.

2. The constrained damping coating structure reinforced with a honeycomb structure according to claim 1, characterized in that, The thickness of the damping coating is 2~10mm.

3. The constrained damping coating structure reinforced with a honeycomb structure according to claim 1, characterized in that, The honeycomb structure is a three-dimensional structure with multiple cavities prepared by laminating and bonding thin film or foil materials, cutting them to the designed size, and then stretching them laterally, or a grid-like three-dimensional structure with multiple cavities prepared by inserting strip-shaped thin layer materials.

4. The constrained damping coating structure reinforced with a honeycomb structure according to claim 3, characterized in that, The depth of the cavities in the honeycomb structure is the thickness of the resulting three-dimensional structure, and the shape of the cavities is one of hexagons, quadrilaterals, or triangles.

5. The constrained damping coating structure reinforced with a honeycomb structure according to claim 4, characterized in that, The honeycomb structure can be cut and assembled into a suitable shape according to the shape of the coating surface.

6. The constrained damping coating structure reinforced with a honeycomb structure according to claim 5, characterized in that, The length and width of the honeycomb structure are much greater than its thickness.

7. The constrained damping coating structure reinforced with a honeycomb structure according to claim 6, characterized in that, The honeycomb structure is made of either metal or plastic.

8. The constrained damping coating structure reinforced with a honeycomb structure according to claim 7, characterized in that, The honeycomb structure is embedded into the honeycomb structure, exposing the damping coating by 0.5~5mm, preferably 1~4mm.

9. A method for enhancing a constraint damping coating using a honeycomb structure, characterized in that, Includes the following steps: (1) Apply a damping coating to the substrate that has been primed; (2) When the damping coating is not cured, the honeycomb sheet is embedded in the damping coating. The embedding depth is controlled. The honeycomb sheet is embedded until the damping coating is exposed by 0.5~5mm. After drying, the modified damping coating is obtained. (3) A constraint coating is applied to the modified damping coating and cured to obtain a honeycomb structure reinforced constraint damping coating.

10. The application of a method for reinforcing constrained damping coating with a honeycomb structure as described in any one of claims 1-9 in vibration reduction and noise reduction of ship cabins, decks, rail transit carriages, and engineering machinery cabs.

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