CN221641970U - High-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and composite superstructure - Google Patents
High-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and composite superstructure Download PDFInfo
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Abstract
The utility model discloses a high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and a composite metamaterial structure, wherein the integrated metamaterial structure comprises a high-load-bearing structure part with high rigidity and high porosity and a flexible thin-layer sound-insulation part; the high bearing structure part comprises a high-porosity plate shell structure layer and a supporting mass layer, and the supporting mass layer comprises a plurality of supporting mass bodies which are discretely distributed on one side of the high-porosity plate shell structure layer; the flexible thin-layer sound insulation part is positioned between the two high bearing structure parts, and two sides of the flexible thin-layer sound insulation part are respectively connected with the supporting mass layer. The utility model is applied to the field of noise treatment, and the high-bearing structure part consisting of the high-porosity plate-shell structural layer and the discretely distributed supporting mass bodies is introduced on the basis of the traditional plate-type acoustic metamaterial, so that the metamaterial structure integrating the high-bearing and low-frequency high-sound-insulation functions has good low-frequency and high-efficiency sound-insulation performance, high-rigidity bearing capacity and wide engineering application prospect.
Description
Technical Field
The utility model relates to the new material and new technical field of noise treatment, in particular to a high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and a composite superstructure, which can be applied to acoustic control of modern transportation vehicles (rail vehicles, aircrafts, spacecrafts, ships, automobiles, engineering trucks), novel functional venues/rooms (waiting halls, recording/broadcasting halls, meeting venues, multifunctional classrooms, anechoic rooms), intelligent furniture (air conditioners, refrigerators, washing machines, fresh air systems), transmission substations, road sound barriers, pipeline systems and the like.
Background
The multifunctional composite bearing structure with the advantages of light weight, high rigidity and the like is widely applied to the fields of aircrafts, ships, high-speed rails and the like. Currently, new equipment is developing towards high power, high speed, light weight, intellectualization and the like, and people have higher requirements on sound insulation, noise reduction and structural rigidity of the equipment. For the control of high-frequency noise, due to the characteristics of short wavelength and weak transmission capacity, a good noise reduction effect can be realized by using a common light and thin sound absorbing and insulating material. The control of low-frequency noise (100-1000 Hz) is limited by a mass law, so that the traditional structure can only realize low-frequency high-sound-insulation amount by increasing the structure mass, and the mass increase is contrary to the development concept of modern equipment, and the actual engineering application needs can not be well met. How to realize low-frequency high sound insulation while ensuring light weight and also can give consideration to larger rigidity is a great challenge facing the engineering community.
In recent years, the metamaterial technology proposed and developed in the fields of acoustic physics and condensed state physics can break the limit of mass law, and provides a new thought and a new method for sound insulation and noise reduction control. The metamaterial/structure refers to a novel composite structure formed by attaching a specially designed artificial oscillator unit (such as a local resonance unit, for short, an oscillator) to a base structure in a certain way (such as a metamaterial plate-shell structure formed by attaching the artificial oscillator unit to the base plate-shell structure). The acoustic metamaterial/structure has supernormal physical characteristics (such as negative equivalent mass density, negative equivalent modulus and the like), and can realize supernormal control of low-frequency elastic waves and acoustic waves, so that the acoustic metamaterial/structure has wide application value in the field of low-frequency vibration reduction and noise reduction. The acoustic metamaterial can be roughly divided into three types, namely a membrane type, a plate type and a Helmholtz resonance type, and the three types have the common characteristic that the regulation and control of sound waves are based on the characteristics of a manually designed structure rather than the characteristics of the material, so that different configuration structures can be designed to meet different sound wave regulation and control requirements. Today, some acoustic metamaterials have appeared with simple structures and have proven to have low frequency sound insulation properties above the law of mass, but their stiffness is mostly lower and more difficult to fix, without load carrying capacity, thereby limiting their practical engineering applications.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model provides the metamaterial structure and the composite superstructure with high bearing and low frequency and high sound insulation functions, which can effectively have high rigidity and low frequency sound insulation performance and have wide engineering application prospect.
In order to achieve the above purpose, the utility model provides a high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure, which comprises two layers of high-load-bearing structural parts with high rigidity and high porosity and one layer of flexible thin-layer sound-insulation parts;
The high-bearing structure part comprises a high-porosity plate shell structure layer and a supporting mass layer, and the supporting mass layer comprises a plurality of supporting mass bodies which are discretely distributed on one side of the high-porosity plate shell structure layer;
The flexible thin-layer sound insulation part is positioned between the two high-bearing structural parts, and two sides of the flexible thin-layer sound insulation part are respectively connected with the supporting quality layer.
In one embodiment, the high porosity sheet shell structure layer is a high sound transmission sheet shell structure having a porosity of greater than or equal to 30%.
In one embodiment, the flexible thin-layer sound insulation part is a thin plate with the thickness smaller than or equal to 1mm, and the bending rigidity of the flexible thin-layer sound insulation part is smaller than the bending rigidity of an aluminum plate with the thickness smaller than 0.5 mm.
In one embodiment, the cavity between the high load bearing structure portion and the flexible thin acoustic insulation portion is filled with a porous acoustic absorption medium.
In one embodiment, the geometry of the holes on the high-porosity plate shell structure layer is circular, elliptical, rectangular, trapezoidal, rhombic, triangular or axisymmetric regular polygon;
the high-porosity plate shell structure layer is made of one of a metal material, a plastic material, a rubber material, a resin material and a composite material.
In one embodiment, the support mass is a bar or block;
The cross section of the supporting mass body is rectangular, conical, trapezoidal, rhombic, triangular or axisymmetric regular polygonal.
In order to achieve the above purpose, the utility model also provides a high-load and low-frequency high-sound-insulation function integrated composite super structure, which comprises more than two high-load and low-frequency high-sound-insulation function integrated metamaterial structures;
Each high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure is sequentially stacked, and two adjacent high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structures are directly connected or connected through a connecting structure.
In order to achieve the above purpose, the utility model also provides a high-load and low-frequency high-sound-insulation function integrated composite super structure, which comprises an acoustic decoupling part, a plate shell structure part and the high-load and low-frequency high-sound-insulation function integrated metamaterial structure;
The acoustic decoupling part is positioned between the high-load and low-frequency high-sound-insulation function integrated metamaterial structure and the plate shell structure part; or (b)
The acoustic decoupling part is positioned at one side of the metamaterial structure integrating high bearing and low frequency high sound insulation functions; or (b)
The acoustic decoupling portion is located on one side of the panel housing structure portion.
In one embodiment, the acoustic decoupling portion is a high porosity acoustic medium having a porosity of greater than 70%.
In one embodiment, the plate shell structure part is one of a metamaterial structure integrating high bearing and low frequency high sound insulation functions, a homogeneous material plate shell, a composite material plate shell, a honeycomb sandwich plate shell, a corrugated sandwich plate shell, a light foam sandwich plate shell or a lattice structure sandwich plate shell.
Compared with the prior art, the utility model has the following beneficial technical effects:
According to the utility model, the high-bearing structure part consisting of the high-porosity plate shell structure layer and the discretely distributed supporting mass bodies is introduced on the basis of the traditional plate-type acoustic metamaterial, so that the metamaterial structure integrating the high-bearing and low-frequency high-sound insulation functions is simple and reasonable in structure, and can effectively have high rigidity and low-frequency sound insulation performance.
Specifically, the utility model is a high-bearing structure part composed of a high-porosity plate shell structure layer and a group of discretely distributed supporting mass bodies on the basis of the traditional plate-type acoustic metamaterial, so that the rigidity and bearing capacity of the high-bearing structure part are improved, and the low-frequency sound insulation performance of the plate-type acoustic metamaterial is ensured not to be influenced. The porosity of the high-porosity plate shell structure layer has influence on the sound insulation performance of the high-bearing structure part and the high-bearing and low-frequency high-sound insulation function integrated metamaterial structure. The concrete steps are as follows: the sound insulation bandwidth of the metamaterial structure integrating the high-load and low-frequency high-sound insulation functions in a certain range is increased along with the increase of the porosity, and when the porosity is not less than 30%, the change of the porosity has small influence on the sound insulation performance of the metamaterial integrating the high-load and low-frequency high-sound insulation functions. Under the condition of acoustic wave excitation, the high-load and low-frequency high-sound-insulation function integrated metamaterial can generate a certain number of sound insulation peaks and sound insulation valleys in a designed frequency range, and the generation of the sound insulation peaks and the sound insulation valleys is related to the dynamic equivalent areal density of the high-load and low-frequency high-sound-insulation function integrated metamaterial. Specifically, the high-load and low-frequency high-sound-insulation function integrated metamaterial has the maximum dynamic equivalent areal density at the sound-insulation peak frequency.
In conclusion, the utility model has good low-frequency and high-efficiency sound insulation performance and high-rigidity bearing capacity, is a multifunctional composite super structure, and has wide engineering application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of an integrated metamaterial structure in embodiment 1 of the present utility model;
FIG. 2 is a first isometric view of a high load bearing structure of embodiment 1 of the present utility model;
FIG. 3 is a second perspective view of the high load bearing structure of embodiment 1;
FIG. 4 is a schematic view of a porous acoustic foam medium as the cavity medium in example 1 of the present utility model;
FIG. 5 is a schematic structural diagram of an integrated metamaterial structure when the geometry of the holes in the high-porosity plate-shell structure layer is diamond in embodiment 1;
FIG. 6 is a schematic structural diagram of an integrated metamaterial structure when the geometry of the holes in the high-porosity plate-shell structure layer in embodiment 1 of the present utility model is polygonal;
FIG. 7 is a schematic structural diagram of an integrated metamaterial structure when the geometry of the holes in the high-porosity plate-shell structure layer in embodiment 1 is triangular;
FIG. 8 is a schematic structural view of an integrated metamaterial structure when the cross-sectional shape of the supporting mass body is trapezoid in embodiment 1 of the present utility model;
FIG. 9 is a schematic structural view of an integrated metamaterial structure when the cross-sectional shape of the supporting mass body in embodiment 1 of the present utility model is an axisymmetric regular polygon;
FIG. 10 is a schematic structural view of an integrated metamaterial structure when the cross-sectional shape of the supporting mass body is I-shaped in embodiment 1 of the present utility model;
FIG. 11 is a schematic structural diagram of an integrated metamaterial structure in two-dimensional periodic arrangement of supporting mass bodies in embodiment 1 of the present utility model;
FIG. 12 is a schematic diagram of the structure of an integrated super-structure unit in embodiment 1 of the present utility model;
FIG. 13 is a schematic view showing the influence of the porosity variation of the high porosity plate shell structure layer on the sound insulation performance of the integrated metamaterial structure in embodiment 1 of the present utility model;
FIG. 14 is a schematic structural diagram of an integrated metamaterial structure with a layer of high-load bearing structure in embodiment 1 of the present utility model;
FIG. 15 is a schematic view of a first embodiment of the integrated composite superstructure of example 2 of the present utility model;
FIG. 16 is a schematic view of a second embodiment of the integrated composite superstructure of example 2 of the present utility model;
FIG. 17 is a schematic view of the sound insulation performance of the integrated composite superstructure of example 2 of the present utility model;
fig. 18 is a schematic diagram of a third embodiment of the integrated composite superstructure of example 3 of the present utility model.
Reference numerals: 1. a high porosity plate shell structural layer; 2. supporting the mass body; 3. a flexible thin layer sound insulation part; 4. a cavity; a1, a high bearing structure part; a2, an integrated metamaterial structure; a3, an acoustic decoupling part; a4, a plate shell structure part.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the device can be mechanically connected, electrically connected, physically connected or wirelessly connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Example 1
Fig. 1 to 3 show a metamaterial structure with integrated high-load-bearing and low-frequency high-sound-insulation functions (hereinafter referred to as an integrated metamaterial structure) disclosed in this embodiment, which mainly comprises two layers of high-load-bearing structural parts A1 with high rigidity and high porosity and one layer of flexible thin-layer sound-insulation parts 3. The high bearing structure part A1 comprises a high-porosity plate shell structure layer 1 and a supporting mass layer, the supporting mass layer comprises a plurality of supporting mass bodies 2 which are discretely distributed on one side of the high-porosity plate shell structure layer 1, the flexible thin-layer sound insulation part 3 is positioned between the two high bearing structure parts A1, and two sides of the flexible thin-layer sound insulation part 3 are respectively connected with the supporting mass layer.
In the implementation process, the cavity 4 formed between the high-porosity plate shell structural layer 1 and the flexible thin-layer sound insulation part 3 may not be filled with other substances, namely, air is used as an acoustic medium, namely, as shown in fig. 1. Preferably, the cavity 4 between the high load bearing structure portion A1 and the flexible thin acoustic layer portion 3 may also be filled with a porous sound absorbing medium, such as a porous foam material, a porous fibrous material, or a combination of different high pore acoustic media, etc., as shown in fig. 4.
In the specific implementation process, the material of the high-porosity plate shell structure layer 1 is one of a metal material, a plastic material, a rubber material, a resin material and a composite material. The geometry of the holes on the high-porosity plate-shell structure layer 1 is circular, elliptical, rectangular, trapezoidal, diamond-shaped, triangular or axisymmetric regular polygonal, for example, the high-porosity plate-shell structure layer 1 with circular holes, diamond-shaped holes, polygonal holes and triangular holes is shown in fig. 1, 5, 6 and 7.
In the specific implementation process, the material of the supporting mass body 2 can be one of a metal material, a plastic material, a rubber material, a resin material and a composite material. The cross-sectional shape of the supporting mass body 2 is rectangular, conical, trapezoidal, diamond-shaped, triangular or axisymmetric regular polygonal, for example, the supporting mass body 2 shown in fig. 1, 8, 9, 10 is rectangular, trapezoidal, axisymmetric regular polygonal and i-shaped cross-section, respectively.
In the specific implementation process, the arrangement mode of the supporting mass bodies 2 on the high-porosity plate shell structure layer 1 is one-dimensional periodic or non-periodic arrangement and two-dimensional periodic or non-periodic arrangement. For example, fig. 1 and 11 are respectively a one-dimensional and two-dimensional array arrangement.
In the specific implementation process, the flexible thin-layer sound insulation part 3 is a thin plate with the thickness smaller than or equal to 1mm, and the bending rigidity of the flexible thin-layer sound insulation part 3 is smaller than that of an aluminum plate with the bending rigidity smaller than 0.5 mm. The flexible thin-layer sound insulation part 3 may be made of one of metal material, plastic material, rubber material, resin material and composite material.
The high-porosity plate shell structural layer 1 and the supporting mass body 2 form a high-bearing structural part A1 with high rigidity and high porosity, and the high-bearing structural part A1 is used as the additional mass of the flexible thin-layer sound insulation part 3 on the one hand and is used for adjusting the sound insulation peak frequency of the integrated metamaterial structure; on the other hand, the high-load-bearing structure portion A1 can provide rigidity for the integrated metamaterial structure while affecting smooth transmission of sound waves, and can prevent the flexible thin-layer sound insulation portion 3 from being damaged to a certain extent.
As a preferred embodiment, the high-bearing structure part A1 formed by the high-porosity plate shell structural layer 1 and the supporting mass body 2 can be integrally formed by casting, 3D printing or additive processing, so that the integrity of the product is ensured, and the super structure can have better bearing capacity.
In the specific implementation process, the high bearing structure part A1 and the flexible thin-layer sound insulation part 3 are connected in an adhesive mode, namely the supporting mass body 2 and the flexible thin-layer sound insulation part 3 are connected in an adhesive mode.
It should be noted that, in the specific application process, the high-porosity plate shell structural layer 1, the supporting mass body 2 and the flexible thin-layer sound insulation part 3 can be separately and independently manufactured and then connected to form a whole through connection modes such as riveting, welding, threaded connection, locking connection or cementing connection.
In this embodiment, the integrated metamaterial structure is formed by a plurality of periodic arrays of integrated metamaterial units as shown in fig. 12. Referring to fig. 12, the integrated super-structure unit has a length of 21mm in the x-direction and a length of 7mm in the y-direction. The high porosity sheet shell structural layer 1 in fig. 1 has a porosity of 30%, and the integrated superstructure has a length of 657mm in the x-direction and 657mm in the y-direction.
Under the condition that other conditions are unchanged, the change of the porosity of the high-porosity plate-shell structure layer 1 affects the sound insulation performance of the integrated metamaterial structure, and referring to fig. 13, a schematic diagram of the influence of the change of the porosity of the high-porosity plate-shell structure layer 1 on the sound insulation performance of the integrated metamaterial structure is shown. As shown in fig. 13, the integrated metamaterial structure breaks the limit of mass law in a certain frequency range (200 Hz-700 Hz), realizes higher sound insulation amount, and increases the sound insulation bandwidth with the increase of the porosity when the porosity is less than 30%. Therefore, the metamaterial structure in the embodiment realizes the low-frequency sound insulation multifunctional integrated design under the condition of ensuring the bearing rigidity of the metamaterial structure, and has the low-frequency sound insulation and high-rigidity bearing performance; in addition, the processing and manufacturing cost is low, the installation is convenient and fast, the reliability is high, and the defects of isolated and single functions, long development time, extra space occupation, complex processing and installation, high cost, poor reliability and the like of the traditional metamaterial structural design scheme are overcome.
It should be noted that the integrated metamaterial structure may also have only one layer of high-load-bearing structure portion A1 with high rigidity and high porosity in the specific application process, which is shown in fig. 14.
Example 2
The embodiment discloses a high-load-bearing and low-frequency high-sound-insulation function integrated composite super structure (hereinafter referred to as an integrated composite super structure), which mainly comprises an acoustic decoupling part A3, a plate shell structure part A4 and an integrated metamaterial structure A2 in embodiment 1. The acoustic decoupling portion A3 is a high-porosity acoustic medium with a porosity of greater than 70%, and the acoustic decoupling portion A3 is located between the integrated metamaterial structure A2 and the plate-shell structure portion A4, i.e. as shown in fig. 15. In a specific application process, the integrated metamaterial structure A2 may be disposed between the acoustic decoupling portion A3 and the plate-shell structure portion A4, or the plate-shell structure portion A4 may be disposed between the acoustic decoupling portion A3 and the integrated metamaterial structure A2.
In this embodiment, the acoustic decoupling portion A3 is an acoustic medium with high porosity, such as a porous foam medium, a fibrous porous acoustic medium, or a combination of different high-porosity acoustic media. The plate shell structure portion A4 is one or a combination of more than two of an integrated metamaterial structure A2, a homogeneous material plate shell, a composite material plate shell, a honeycomb sandwich plate shell, a corrugated sandwich plate shell, a light foam sandwich plate shell or a lattice structure sandwich plate shell, for example, as shown in fig. 16. The material of the plate case structural part A4 may be a metal material, a plastic material, a rubber material, a resin material, a composite material, or a combination thereof.
Referring to fig. 17, a schematic diagram of sound insulation performance of the integrated composite super structure in this embodiment is shown in fig. 17, and the number of low-frequency sound insulation peaks of the integrated composite super structure is more than that of low-frequency sound insulation peaks of the single-layer integrated super structure shown in fig. 13, so that the sound insulation bandwidth is wider, and the effects of widening the sound insulation bandwidth and improving the sound insulation performance can be achieved through mutual coupling among multiple sound insulation peaks.
Example 3
The embodiment discloses a high-load-bearing and low-frequency high-sound-insulation function integrated composite super structure (hereinafter referred to as an integrated composite super structure), which mainly comprises more than two integrated metamaterial structures A2 in embodiment 1. Wherein, each integration metamaterial structure A2 stacks gradually along vertical, directly links to each other or links to each other through the connection structure that constitutes with supporting quality layer, flexible thin layer sound insulation portion between two adjacent integration metamaterial structures A2. The integrated composite super structure may further include a plate-shell structure portion A4, and the plate-shell structure portion A4 and the integrated metamaterial structure A2 are stacked, as shown in fig. 18.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure is characterized by comprising two layers of high-load-bearing structural parts with high rigidity and high porosity and a layer of flexible thin-layer sound-insulation part;
The high-bearing structure part comprises a high-porosity plate shell structure layer and a supporting mass layer, and the supporting mass layer comprises a plurality of supporting mass bodies which are discretely distributed on one side of the high-porosity plate shell structure layer;
The flexible thin-layer sound insulation part is positioned between the two high-bearing structural parts, and two sides of the flexible thin-layer sound insulation part are respectively connected with the supporting quality layer.
2. The high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure according to claim 1, wherein the high-porosity plate shell structure layer is a high-sound-transmission plate shell structure with a porosity of more than or equal to 30%.
3. The high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure according to claim 1, wherein the flexible thin-layer sound-insulation part is a thin plate with the thickness smaller than or equal to 1mm, and the bending rigidity of the flexible thin-layer sound-insulation part is smaller than the bending rigidity of an aluminum plate with the thickness smaller than 0.5 mm.
4. The high-load and low-frequency high-sound insulation function integrated metamaterial structure according to claim 1, wherein a cavity between the high-load structure part and the flexible thin-layer sound insulation part is filled with a porous sound absorption medium.
5. The metamaterial structure integrating high bearing and low frequency high sound insulation functions according to claim 1, wherein the geometry of the holes in the high-porosity plate shell structure layer is circular, elliptical, rectangular, trapezoidal, rhombic, triangular or axisymmetric regular polygon;
the high-porosity plate shell structure layer is made of one of a metal material, a plastic material, a rubber material, a resin material and a composite material.
6. The metamaterial structure integrating high bearing and low frequency high sound insulation functions according to claim 1, wherein the supporting mass body is a strip-shaped body or a block-shaped body;
The cross section of the supporting mass body is rectangular, conical, trapezoidal, rhombic, triangular or axisymmetric regular polygonal.
7. The high-load and low-frequency high-sound-insulation function integrated composite super structure is characterized by comprising more than two high-load and low-frequency high-sound-insulation function integrated metamaterial structures according to any one of claims 1 to 6;
Each high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure is sequentially stacked, and two adjacent high-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structures are directly connected or connected through a connecting structure.
8. The high-load and low-frequency high-sound-insulation function integrated composite super structure is characterized by comprising an acoustic decoupling part, a plate shell structure part and the high-load and low-frequency high-sound-insulation function integrated metamaterial structure as set forth in any one of claims 1 to 6;
The acoustic decoupling part is positioned between the high-load and low-frequency high-sound-insulation function integrated metamaterial structure and the plate shell structure part; or (b)
The acoustic decoupling part is positioned at one side of the metamaterial structure integrating high bearing and low frequency high sound insulation functions; or (b)
The acoustic decoupling portion is located on one side of the panel housing structure portion.
9. The high-load and low-frequency high-sound insulation function integrated composite superstructure according to claim 8, wherein the acoustic decoupler is a high-porosity acoustic medium with a porosity greater than 70%.
10. The high-load and low-frequency high-sound-insulation function integrated composite super structure according to claim 8, wherein the plate shell structure part is one of a high-load and low-frequency high-sound-insulation function integrated super material structure, a homogeneous material plate shell, a composite material plate shell, a honeycomb sandwich plate shell, a corrugated sandwich plate shell, a light foam sandwich plate shell or a lattice structure sandwich plate shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322992453.4U CN221641970U (en) | 2023-11-07 | 2023-11-07 | High-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and composite superstructure |
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