Super-configuration damping material and preparation method and application thereof

Abstract

The invention belongs to the technical field of mechanical metamaterials, and particularly relates to a super-configuration damping material and a preparation method and application thereof. The super-structure damping material provided by the invention comprises a plurality of super-structure damping material unit cells, each superstructure damping material unit cell comprises a viscous-elastic material layer, metal type local resonance units arranged on one surface of the viscous-elastic material layer in an array mode, any adjacent metal type local resonance units in the superstructure damping material unit cells are arranged at intervals, and fiber reinforced material layers are arranged between any adjacent metal type local resonance units. The viscoelastic material layer comprises a viscoelastic material; the metal type local resonance unit is provided with a double-spiral structure. The super-configuration damping material provided by the invention is at low frequency (lt; and the loss factor (eta) under the vibration (500 Hz) is greater than 0.3, so that the lightweight design can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical metamaterials, and in particular relates to a super-configured damping material and a preparation method and application thereof. Background Art

[0002] With the rapid development of modern industry, the vibration and noise of equipment have become an increasing focus. Damping materials, as a noise and vibration reduction material, can significantly reduce structural vibration and the noise caused by vibration. Currently, damping materials are widely used in the automotive, shipbuilding, aerospace and other fields.

[0003] Traditional damping materials are divided into three categories: viscoelastic damping materials, high-damping alloy materials, and composite damping materials. Common damping materials include rubber, polymers, damping alloys, and ceramic-based composites. Traditional damping materials dissipate vibration energy through the material's inherent viscoelasticity or internal friction (such as molecular chain motion and interfacial friction), which is considered intrinsic damping.

[0004] At present, traditional damping materials have a low loss factor (η) under low-frequency (<500Hz) vibration. Therefore, when high damping is required, the amount of material needs to be increased, resulting in a bulky damping structure and the inability to achieve lightweight design. Summary of the Invention

[0005] In view of this, the present invention aims to provide a super-configured damping material, its preparation method, and its application. The super-configured damping material provided by the present invention can maintain a high loss factor over a wide temperature and frequency range, with a loss factor (η) greater than 0.3 at low-frequency (<500Hz) vibration, thereby enabling lightweight design.

[0006] The present invention provides a super-structure damping material, comprising a plurality of super-structure damping material unit cells;

[0007] The superstructure damping material unit cell includes a viscoelastic material layer, metal type local resonance units arrayed on one surface of the viscoelastic material layer, any adjacent metal type local resonance units in the superstructure damping material unit cell are arranged at intervals, and a fiber reinforcement material layer is arranged between any adjacent metal type local resonance units;

[0008] The viscoelastic material layer includes a viscoelastic material;

[0009] The metal type local resonance unit is provided with a double helix structure.

[0010] Preferably, the thickness of the superstructure damping material unit cell is 4.5-5.5 mm, and the length×width is not greater than 100×100 mm; the shape of the superstructure damping material unit cell is square.

[0011] Preferably, the thickness of the viscoelastic material layer is 4 to 4.5 mm; the viscoelastic material includes one or more of thermoplastic polyurethane elastomer rubber, silicone rubber, hydrogenated carboxyl nitrile rubber, asphalt and butyl rubber.

[0012] Preferably, the viscoelastic material layer further comprises metal particles filled in the viscoelastic material;

[0013] The metal particles include one or more of steel particles, aluminum particles, lead particles and tungsten particles; the diameter of the metal particles is 1 to 3 mm;

[0014] The mass of the metal particles accounts for 30-60% of the mass of the viscoelastic material.

[0015] Preferably, the thickness of the metal-type local resonance unit is 0.5-1 mm; the shape of the metal-type local resonance unit is square, and the side length of the metal-type local resonance unit is ≤45 mm; the superstructure damping material unit cell is provided with 4 metal-type local resonance units.

[0016] Preferably, the material of the metal-type local resonance unit includes one or more of steel, magnesium alloy and aluminum alloy.

[0017] Preferably, the dimensions of the double helix structure satisfy the helix equation, which is:

[0018]

[0019] Wherein, x(θ) and y(θ) are the coordinates of any point on the spiral line in the Cartesian coordinate system, tt is the beam width of the spiral line, and its maximum value is 2 mm; tw is the groove width of the spiral line, and its maximum value is 4 mm; 2π≤θ≤8π, and θ is used to control the length of the spiral line.

[0020] Preferably, the fiber reinforcement material layer includes one or more of aramid fiber, carbon fiber and basalt fiber;

[0021] The thickness of the fiber-reinforced material layer is equal to the thickness of the metal-type local resonance unit.

[0022] The present invention provides a method for preparing the super-configured damping material described in the above technical solution, comprising the following steps:

[0023] Fixing the metal type local resonance unit on the surface of the viscoelastic material layer, and then embedding the fiber reinforcement material layer between any adjacent metal type local resonance units to obtain a superstructure damping material unit cell;

[0024] The super-configured damping material is composed of super-structural damping material unit cells.

[0025] The present invention provides the application of the super-configured damping material described in the above technical solution or the super-configured damping material obtained by the preparation method described in the above technical solution in the field of noise reduction and vibration reduction.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a metastructured damping material comprising a plurality of superstructure damping material cells; the superstructure damping material cell comprises a viscoelastic material layer, metallic localized resonant units arrayed on one surface of the viscoelastic material layer, any adjacent metallic localized resonant units within the superstructure damping material cell being spaced apart, and a fiber-reinforced material layer disposed between any adjacent metallic localized resonant units; the viscoelastic material layer comprises a viscoelastic material; and the metallic localized resonant units are configured with a double-helical structure. The present invention achieves vibration control by rationally arranging the metallic localized resonant units. The damping mechanism of the metastructured damping material provided by the present invention is based on energy localization, rather than inherent losses in the viscoelastic material layer. The present invention utilizes Bragg scattering or resonant units to attenuate specific frequency waves, and suppresses vibration propagation through negative equivalent mass / stiffness, making it suitable for low-frequency vibrations (<500Hz). By leveraging the periodicity and localized resonance principles of metamaterials, the present invention significantly broadens the damping material's low-frequency vibration attenuation capability, achieving a wide temperature (-30 to 500°C) and frequency adaptability.

[0028] At the same time, the metal local resonance unit in the present invention adopts a double-helix structure, the overall structure is simple, and the advantages of mechanical metamaterials are fully utilized. The periodic structure is used to attenuate and suppress the elastic wave energy at low frequencies. The local resonance unit can perform fixed-point vibration elimination on the vibration of a specific frequency point, and synergize with the mass damping to provide a larger damping coefficient. The damping loss factor of the damping material of the present invention is greater than 0.3. Traditional damping materials have poor frequency adaptability, and the loss factor (η) is low under low-frequency (<500Hz) vibration. When there is a high damping demand, the material dosage needs to be increased, which may lead to a bulky structure. The damping material of the present invention has high damping performance in a given frequency range and is thin in thickness, which is a lightweight damping.

[0029] Furthermore, the viscoelastic material layer also includes metal particles filled within the viscoelastic material; the diameter of the metal particles ranges from 1 to 3 mm. By filling the viscoelastic material layer with metal particles, the present invention further optimizes the damping performance of the super-configured damping material, attenuating and suppressing elastic wave energy at low frequencies. The localized resonance unit can eliminate vibrations at specific frequencies, synergizing with mass damping to provide a large damping coefficient. The damping loss factor of the damping material of the present invention is greater than 0.3. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a superstructure damping material unit cell of the superstructure damping material provided by the present invention;

[0032] Figure 2 A schematic diagram of the distribution of metal particles filled in the viscoelastic material in the super-configured damping material provided by the present invention;

[0033] Figure 3 Exploded diagrams of four material structures in the super-configured damping material provided by the present invention;

[0034] Figure 4 Schematic diagram of the double helix structure of the metal local resonance unit in the present invention;

[0035] Figure 5 Schematic diagram of the structure of the super-configured damping material after the unit cell period of the super-structural damping material in the present invention is expanded;

[0036] Figure 6 The spiral structure is simplified into a spring-mass system diagram;

[0037] Figure 7 is the displacement response spectrum;

[0038] Figure 8 The 360Hz high damping design result of the super-configured damping material provided in the embodiment of the present invention;

[0039] Figure 9 360Hz vibration mode cloud diagram of the super-configured damping material provided in an embodiment of the present invention;

[0040] Figure 10 This is a diagram showing the vibration reduction effect of the super-configured damping material provided in an embodiment of the present invention at a frequency of 360 Hz;

[0041] Figure 11 The 440Hz high damping design results of the super-configured damping material provided by the embodiment of the present invention;

[0042] Figure 12 440Hz vibration mode cloud diagram of the super-configured damping material provided in an embodiment of the present invention;

[0043] Figure 13 This is a diagram showing the vibration reduction effect of the super-configured damping material provided by an embodiment of the present invention at a frequency of 440 Hz;

[0044] In the figure: 1 is a metal local unit, 2 is a fiber-reinforced material layer, 3 is a viscoelastic material layer, 4 is a metal particle, and 5 is a double helix structure. DETAILED DESCRIPTION

[0045] The present invention provides a super-structure damping material, comprising a plurality of super-structure damping material unit cells;

[0046] The superstructure damping material unit cell includes a viscoelastic material layer, metal type local resonance units arrayed on one surface of the viscoelastic material layer, any adjacent metal type local resonance units in the superstructure damping material unit cell are arranged at intervals, and a fiber reinforcement material layer is arranged between any adjacent metal type local resonance units;

[0047] The viscoelastic material layer includes a viscoelastic material;

[0048] The metal type local resonance unit is provided with a double helix structure.

[0049] In the present invention, unless otherwise specified, the materials and equipment used are commercially available products in the art.

[0050] Figure 1 A schematic structural diagram of a superstructure damping material unit cell of the superstructure damping material provided by the present invention, Figure 2 This is a schematic diagram of the distribution of metal particles filled in the viscoelastic material in the super-configured damping material provided by the present invention. Figure 3 Exploded diagrams of four material structures in the super-configured damping material provided by the present invention. Figure 3 From left to right in the figure are fiber-reinforced material layer, metal local resonance unit, metal particles and viscoelastic material. Figure 4 is a schematic diagram of the double helix structure of the metal local resonance unit in the present invention, Figure 5 The schematic diagram of the structure of the super-structure damping material after the unit cell period of the super-structure damping material in the present invention is expanded. Figures 1 to 5 The configuration damping material provided by the present invention is described in detail.

[0051] The superstructure damping material provided by the present invention includes a plurality of superstructure damping material cells. As one or more embodiments of the present invention, Figure 5 As shown, the number of superstructure damping material cells is 9, forming a 3×3 array arrangement. In the present invention, the thickness of the superstructure damping material cell is preferably 4.5 to 5.5 mm, and in an embodiment, it can be 5 mm. The length × width of the superstructure damping material cell is preferably not greater than 100 × 100 mm. As one or more embodiments of the present invention, the shape of the superstructure damping material cell is preferably square, and the length × width is preferably 100 mm × 100 mm.

[0052] In the present invention, the structural diagram of the superstructure damping material unit cell is as follows: Figure 1 As shown. In the present invention, the superstructure damping material unit cell includes a viscoelastic material layer 3. In the present invention, the viscoelastic material layer 3 includes a viscoelastic material. The viscoelastic material preferably includes one or more of thermoplastic polyurethane elastomer rubber, silicone rubber, hydrogenated carboxyl nitrile rubber, asphalt, and butyl rubber. The butyl rubber preferably includes unmodified butyl rubber or modified butyl rubber. The viscoelastic material of the present invention can enable the damping material to achieve good damping performance.

[0053] In an embodiment of the present invention, when the viscoelastic material is preferably modified butyl rubber, the modified butyl rubber material is a butyl damping felt coil, model MT14, specification 2mm thickness, and the manufacturer is Foshan Kaihui Sound Insulation Material Co., Ltd.

[0054] As an embodiment of the present invention, the viscoelastic material may be a product of Calm Sound Insulation Materials (Guangzhou) Co., Ltd., model YLANF, with a thickness of 2 mm.

[0055] As an embodiment of the present invention, the viscoelastic material may be a product of Suzhou Youdisheng New Material Technology Co., Ltd., with a model number of 50 and a thickness of 2 mm.

[0056] In the present invention, the viscoelastic material layer preferably also includes metal particles filled in the viscoelastic material. The metal particles 4 are preferably randomly distributed in the viscoelastic material. The metal particles 4 are preferably uniformly dispersed in the viscoelastic material. The metal particles 4 preferably include one or more of steel particles, aluminum particles, lead particles and tungsten particles. The diameter of the metal particles 4 is preferably 1 to 3 mm. The metal particles of the diameter described in the present invention can enable the damping material to achieve good damping performance. During the vibration process, the metal particles dissipate part of the vibration energy in the form of frictional heat. The mass of the metal particles 4 preferably accounts for 30 to 60% of the mass of the viscoelastic material, and more preferably 40 to 50%.

[0057] In the present invention, the thickness of the viscoelastic material layer 3 is preferably 4-4.5 mm, and in the embodiment may be 4.2 mm.

[0058] In the present invention, the superstructure damping material unit cell includes metal-type local resonance units 1 arrayed on a surface of the viscoelastic material layer 3. Any adjacent metal-type local resonance units 1 are spaced apart. In the present invention, the metal-type local resonance units 1 are provided with a double helical structure 5. In the present invention, the thickness of the metal-type local resonance units 1 is preferably 0.5 to 1 mm, and in an embodiment, it can be 0.8 mm. The sum of the thickness of the metal-type local resonance units 1 and the thickness of the viscoelastic material layer 3 is the thickness of the superstructure damping material unit cell.

[0059] As one or more embodiments of the present invention, the shape of the metal-type local resonance unit is preferably square. The side length of the metal-type local resonance unit is preferably ≤45 mm, and in an embodiment, it can be 45 mm.

[0060] As one or more embodiments of the present invention, an array of metal-type local resonance units 1 is arranged on the upper surface of the viscoelastic material layer 3. The superstructure damping material unit cell is provided with four of the metal-type local resonance units.

[0061] In the present invention, the material of the metal-type local resonance unit preferably includes one or more of steel, magnesium alloy and aluminum alloy.

[0062] In the present invention, the size of the double helix structure preferably satisfies the helix equation, which is preferably:

[0063]

[0064] Wherein, x(θ) and y(θ) are the coordinates of any point on the spiral line in the Cartesian coordinate system, tt is the beam width of the spiral line, and its maximum value is 2 mm; tw is the groove width of the spiral line, and its maximum value is 4 mm; 2π≤θ≤8π, and θ is used to control the length of the spiral line.

[0065] In the present invention, the helical length of the double helix structure is preferably 80 to 90 mm, specifically 83.27 mm or 88.26 mm. The helical beam width of the double helix structure is ≤ 2 mm. The helical groove width of the double helix structure is ≤ 4 mm. In the present invention, the helical root width of the double helix structure is preferably 1.55 mm.

[0066] In the present invention, a mass block is preferably provided in the central region of the double helix structure. The material of the mass block is the same as that of the metal local resonance unit. In the present invention, the radius of the central mass block of the double helix structure is preferably 4-5 mm, and in the embodiment, it can be 4.86 mm.

[0067] In the present invention, Figure 4As shown, the outermost circle of the helix of the double helical structure is located at the edge of the metallic local resonance unit.

[0068] In the present invention, the superstructure damping material unit cell includes a fiber-reinforced material layer 2 disposed between any adjacent metal-type localized resonance units 1. In the present invention, the fiber-reinforced material layer preferably includes one or more of aramid fiber, carbon fiber, and basalt fiber. The thickness of the fiber-reinforced material layer is preferably equal to the thickness of the metal-type localized resonance unit.

[0069] In the present invention, the shape of the superstructure damping material unit cell is a square, and the side length is preferably 100 mm. The shape of the metal-type local resonance unit is preferably a square, and the side length is preferably 45 mm. The number of metal-type local resonance units arrayed on the upper surface of the superstructure damping material unit cell is preferably 4, and the 4 metal-type local resonance units are distributed in the four vertex areas of the superstructure damping material unit cell and are spaced apart from each other. The spacing distance between any adjacent metal-type local resonance units is preferably 10 mm. The shape of the fiber-reinforced material layer is preferably a cross, and the width of the fiber-reinforced material layer is preferably 10 mm.

[0070] In the present invention, Figure 5 As shown, the superstructure damping material is preferably arranged in a 3×3 array.

[0071] The present invention provides a method for preparing the super-configured damping material described in the above technical solution, comprising the following steps:

[0072] Fixing the metal type local resonance unit on the surface of the viscoelastic material layer, and then embedding the fiber reinforcement material layer between any adjacent metal type local resonance units to obtain a superstructure damping material unit cell;

[0073] The super-configured damping material is composed of super-structural damping material unit cells.

[0074] In the present invention, the metal local resonance unit is preferably prepared by forming with a forming die or by stamping.

[0075] In the present invention, the metal type local resonance unit is preferably fixed by gluing, and the gluing is preferably epoxy resin glue.

[0076] In the present invention, the embedded fiber reinforcement material layer is preferably bonded, and the bonding is preferably epoxy resin glue.

[0077] The present invention uses epoxy resin glue to bond the metal type local resonance unit and the fiber reinforced material layer on the surface of the viscoelastic material layer, which helps to further improve the damping performance of the super-configured damping material.

[0078] The present invention also provides the use of the super-configured damping material described in the above technical solution or the super-configured damping material obtained by the above preparation method in the field of noise reduction and vibration reduction.

[0079] The super-configured damping material provided by the present invention, under the premise of selecting a viscoelastic material, can adjust the vibration damping characteristics of the super-configured damping material by adjusting the diameter of the metal particles, the size of the double helix structure, the number of spiral turns of the double helix structure, and the width and thickness of the spiral beam. Specifically, parametric calculations can be performed using finite element software to find the optimal parameters within the required vibration damping frequency band. In the present invention, the double helix structure can be simplified to a spring-mass system, such as Figure 6 As shown, the mass of the base frame is M, the displacement is X, the mass of the mass block is m, the displacement is x, the excitation force on the base frame is F, the reaction force on the mass block is F1, the stiffness of the spiral element is k, the excitation frequency is ω, and j is an imaginary unit; where:

[0080] F-F1=(jω) 2 MX;

[0081] F1=(jω) 2 mx;

[0082] k(Xx)=F1;

[0083] Equivalent mass m e :

[0084] Displacement frequency response H(ω):

[0085] Natural frequency ω0:

[0086] Figure 7 is the displacement response spectrum. Figure 7 As shown in the figure, when the excitation frequency ω is 0 or very low, the internal local resonance unit and the system keep moving in the same direction. At this time, it is equivalent to the two being rigidly connected together. The equivalent mass of the system is greater than 0, and no band gap is generated. When the excitation frequency is close to the natural frequency of the local resonance unit, the equivalent mass tends to infinity, and the state of the system is difficult to change with the change of the external excitation frequency. The local resonance unit and the matrix vibrate in the opposite direction, thereby absorbing and dissipating part of the matrix energy, forming a band gap. When the excitation frequency is Within this range, the system's dynamic equivalent mass is negative, and its vibration characteristics differ significantly from those of conventional materials, resulting in it being called an acoustic superstructure. Therefore, by properly manipulating the values ​​of k or m in the equivalent model, the range of the system's negative equivalent mass can be controlled. k in the equivalent model can be adjusted by modifying the number of turns and width of the spiral beam, while the local resonant mass m can be adjusted by adjusting the diameter of the intermediate mass block or by removing or adding additional mass while keeping the diameter fixed.

[0087] In order to further illustrate the present invention, the super-configured damping material provided by the present invention, its preparation method and application are described in detail below with reference to the accompanying drawings and examples, but they should not be construed as limiting the scope of protection of the present invention.

[0088] The following examples compare noise reduction using two different methods: undamped, traditionally damped, and super-damped. The traditional damping material used in these examples is modified butyl rubber, which is a butyl damping felt coil, model MT14, 2mm thick, and manufactured by Foshan Kaihui Sound Insulation Materials Co., Ltd.

[0089] Example 1

[0090] Figure 8 This is the 360Hz high damping design diagram in Example 1.

[0091] For the 360 ​​Hz high damping design, in the super-configured damping material system provided in this embodiment: the viscoelastic material in the viscoelastic material layer is a modified butyl rubber material, the thickness of the viscoelastic material layer is 4.2 mm, and the length×width is 45 mm×45 mm.

[0092] The metallic local resonance unit is mounted on the upper surface of the viscoelastic material layer. It is made of aluminum alloy, has a thickness of 0.8 mm, and measures 45 mm x 45 mm. There is one unit. The double-helix structure has a helical length of 88.26 mm, a helical root width of 1.55 mm, and a central mass radius of 4.86 mm.

[0093] In this embodiment, the super-configured damping material system composed of the viscoelastic material layer and the metal type local resonance unit is at 360Hz, and the vibration mode cloud diagram is shown in FIG. Figure 9 The vibration reduction of the traditional damping material (modified butyl rubber material, thickness 5mm, length × width 45mm × 45mm, damping loss factor 0.3) is used as a comparison group. The comparison results are as follows: Figure 10 As shown. Figure 10 It shows that compared with traditional damping materials, the damping displacement of the super-configured damping material system provided in this embodiment is significantly reduced at 360 Hz.

[0094] Example 2

[0095] Figure 11 This is the 440Hz high damping design diagram in Example 2.

[0096] For the 440 Hz high damping design, in the super-configured damping material system provided in this embodiment: the viscoelastic material in the viscoelastic material layer is a modified butyl rubber material, the thickness of the viscoelastic material layer is 4.2 mm, and the length×width is 45 mm×45 mm.

[0097] The metallic local resonance unit is mounted on the upper surface of the viscoelastic material layer. It is made of aluminum alloy, has a thickness of 0.8 mm, and measures 45 mm x 45 mm. There is one unit. The helix length of the double-helix structure is 83.27 mm, the width at the helix root is 1.55 mm, and the radius of the central mass is 4.86 mm.

[0098] In this embodiment, the super-configured damping material system composed of the viscoelastic material layer and the metal type local resonance unit is at 440Hz, and the vibration mode cloud diagram is shown in FIG. Figure 12 The vibration reduction of the traditional damping material (modified butyl rubber material, thickness 5mm, length × width 45mm × 45mm, damping loss factor 0.3) is used as a comparison group. The comparison results of the vibration reduction effect at 440Hz frequency are as follows: Figure 13 As shown. Figure 13 It shows that compared with traditional damping materials, the damping displacement of the super-configured damping material system provided in this embodiment is significantly reduced at 440 Hz.

[0099] In Examples 1 and 2, the damping magnitude at the frequency point is adjusted by changing the length of the spiral line. In fact, the length of the spiral line (which can be controlled by θ) and the beam width of the spiral line (which can be controlled by the tt parameter) are controlled.

[0100] The present invention provides a damping material with a compact structure, thin overall thickness and excellent processing technology. The damping material of the present invention is a periodic metamaterial composite damping plate. The metamaterial damping realizes vibration control through an artificially designed periodic structure (local resonance unit). Its damping mechanism is based on wave interference or energy localization, rather than material self-loss. It uses Bragg scattering or resonance units to attenuate specific frequency waves, and suppresses vibration propagation through negative equivalent mass / stiffness. It can be designed for low-frequency vibration (<500Hz), which is difficult to achieve with traditional materials. The damping frequency band is precisely controlled by structural parameters (such as period and shape), and strong damping can be achieved with a small amount of material. By utilizing the periodicity and local resonance principles of metamaterials, the low-frequency vibration attenuation ability of the damping material is greatly broadened. It has a wide temperature (-30 to 500°C) and frequency adaptability, and can be used in vibration and noise control of high-end equipment such as automobiles, rail vehicles, and ships.

[0101] Although the above embodiments provide a detailed description of the present invention, they are only part of the embodiments of the present invention, not all of the embodiments. People can also obtain other embodiments based on the embodiments of the present invention without creative work, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A super-configured damping material, characterized in that: Includes several superstructure damping material unit cells; The superstructure damping material unit cell includes a viscoelastic material layer, metal type local resonance units arrayed on one surface of the viscoelastic material layer, any adjacent metal type local resonance units in the superstructure damping material unit cell are arranged at intervals, and a fiber reinforcement material layer is arranged between any adjacent metal type local resonance units; The viscoelastic material layer includes a viscoelastic material; The metal type local resonance unit is provided with a double helix structure.

2. The super-structured damping material according to claim 1, characterized in that: The thickness of the superstructure damping material unit cell is 4.5-5.5 mm, and the length×width is not greater than 100×100 mm; the shape of the superstructure damping material unit cell is square.

3. The super-structured damping material according to claim 1, characterized in that: The thickness of the viscoelastic material layer is 4 to 4.5 mm; the viscoelastic material includes one or more of thermoplastic polyurethane elastomer rubber, silicone rubber, hydrogenated carboxyl nitrile rubber, asphalt and butyl rubber.

4. The super-structured damping material according to claim 1 or 3, characterized in that: The viscoelastic material layer further includes metal particles filled in the viscoelastic material; The metal particles include one or more of steel particles, aluminum particles, lead particles and tungsten particles; the diameter of the metal particles is 1 to 3 mm; The mass of the metal particles accounts for 30-60% of the mass of the viscoelastic material.

5. The super-structured damping material according to claim 1, characterized in that: The thickness of the metal-type local resonance unit is 0.5-1 mm; the shape of the metal-type local resonance unit is square, and the side length of the metal-type local resonance unit is ≤45 mm; the superstructure damping material unit cell is provided with 4 metal-type local resonance units.

6. The super-structured damping material according to claim 1, characterized in that: The material of the metal-type local resonance unit includes one or more of steel, magnesium alloy and aluminum alloy.

7. The super-structured damping material according to claim 1 or 5, characterized in that: The dimensions of the double helix structure satisfy the helix equation, which is: Wherein, x(θ) and y(θ) are the coordinates of any point on the spiral line in the Cartesian coordinate system, tt is the beam width of the spiral line, with a maximum value of 2 mm; tw is the groove width of the spiral line, with a maximum value of 4 mm; 2π≤θ≤8π, and θ is used to control the length of the spiral line.

8. The super-structured damping material according to claim 1, characterized in that: The fiber reinforcement material layer includes one or more of aramid fiber, carbon fiber and basalt fiber; The thickness of the fiber-reinforced material layer is equal to the thickness of the metal-type local resonance unit.

9. The method for preparing the super-structured damping material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Fixing the metal type local resonance unit on the surface of the viscoelastic material layer, and then embedding the fiber reinforcement material layer between any adjacent metal type local resonance units to obtain a superstructure damping material unit cell; The super-configured damping material is composed of super-structural damping material unit cells.

10. Use of the super-configured damping material according to any one of claims 1 to 8 or the super-configured damping material obtained by the preparation method according to claim 9 in the field of noise reduction and vibration reduction.

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