CN219294903U - High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure - Google Patents
High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure Download PDFInfo
- Publication number
- CN219294903U CN219294903U CN202320660238.1U CN202320660238U CN219294903U CN 219294903 U CN219294903 U CN 219294903U CN 202320660238 U CN202320660238 U CN 202320660238U CN 219294903 U CN219294903 U CN 219294903U
- Authority
- CN
- China
- Prior art keywords
- plate
- sound insulation
- perforated
- load
- multifunctional integrated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Building Environments (AREA)
Abstract
The utility model provides a high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure which comprises at least two plate structures which are arranged in a laminated mode, wherein an air interlayer is formed between at least one group of adjacent plate structures at a certain distance, at least one plate structure in the adjacent plate structures forming the air interlayer is a perforated sandwich plate, the perforated sandwich plate comprises a perforated surface plate, a sandwich layer and a back plate, a plurality of perforations are arranged on the perforated surface plate, the sandwich layer comprises a solid domain and an air domain, the perforated surface plate and the back plate are connected through the solid domain of the sandwich layer, and the perforations of the perforated surface plate penetrate through the air interlayer and the air domain of the sandwich layer. The utility model does not need to additionally introduce acoustic devices such as Helmholtz resonators, mechanical local resonators and the like, has simple manufacturing process and low cost, and can realize light weight and high bearing and simultaneously has excellent low-frequency broadband sound insulation performance.
Description
Technical Field
The utility model mainly relates to the technical field of new noise control materials, in particular to a high-bearing and broadband sound-insulation and noise-reduction multifunctional integrated metamaterial structure.
Background
The sandwich panel is formed by combining upper and lower surface panels and a light sandwich panel, has the remarkable advantages of light weight, high rigidity, high strength and the like, and is widely applied to the fields of national defense equipment, transportation and the like as a bearing structure. With the great improvement of the power, the running speed and the effective load of the novel equipment, the equipment structure faces a severe multi-load environment, wherein mechanical force load and noise load are very common in practical application. However, the low-frequency sound insulation performance of the lightweight sandwich structure is poor due to the law of sound insulation quality. The low-frequency sound insulation performance of the sandwich structure is improved, the novel structure with the bearing and excellent sound insulation performance is developed, and the development of the high-performance novel equipment performance is facilitated. However, the wavelength of low-frequency noise is large, the penetrating power is strong, and the surface density of the structure needs to be greatly improved by adopting the traditional means to improve the low-frequency sound insulation performance of the structure, which is obviously unfavorable for the practical application of the equipment structure in the high-technology fields of aerospace, high-speed trains and the like. On the premise of not greatly improving the surface density and the complexity of the structure, the sound insulation performance of the light sandwich structure is obviously improved in a low-frequency broadband range, and the sound insulation structure is a great difficulty facing the academic world and the engineering world.
In recent years, metamaterial structures which are proposed and developed in the fields of sound physics and condensed state physics provide a new idea for improving the low-frequency sound insulation performance of a light sandwich structure. The traditional membrane and plate metamaterial structure is proved to break through the sound insulation law, and remarkable sound insulation performance improvement is achieved. However, the membrane metamaterial has low structural strength, is easy to age and not resistant to high temperature, and is complex in preparation process of compounding the membrane metamaterial with a sandwich structure, so that the membrane metamaterial is not suitable for being applied to a structure with the sandwich structure for developing bearing and noise reduction; the sound insulation performance of the high-bearing structure can be improved through the plate metamaterial structure formed by periodically adding the local oscillator to the high-bearing substrate structure, but the effective low-frequency acting frequency band of the metamaterial structure utilizing mechanical resonance is narrower under the light-weight condition. Besides the membrane and plate metamaterial structures utilizing mechanical resonance, a metamaterial structure utilizing the resonance effect of an acoustic resonant cavity to improve sound insulation performance is further provided. For example, in one paper published by Meng et al (H.Meng, M.A.Galland, M.Ichchou, O.Bareille, F.X.Xin, T.J.Lu, smallperforationsin corrugatedsandwichpanelsignificantlyenhancelowfrequencysoundabsorption andtransmissionloss, composite structures,182 (2017) 1-11.) a metamaterial structure is constructed by perforating a sandwich panel whose core layer can function as an acoustic resonant cavity without increasing the structural mass and can improve the low frequency sound insulation performance of the structure. However, the metamaterial structure improves sound insulation performance by utilizing the sound absorption effect of the perforated plate composite back cavity structure, and has a narrow effective action frequency band at low frequency and limited actual sound insulation improving effect. The experimental results in the paper show that the sound insulation performance of the metamaterial structure is not obviously improved compared with that of the original structure without perforation. At present, a metamaterial structure with light weight, high bearing capacity, low cost, high reliability and high efficiency in a low-frequency broadband range is not known in the field.
Disclosure of Invention
Aiming at the technical problems in the prior art, the utility model provides a high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
in one aspect, the utility model provides a high-load-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, which comprises at least two plate structures which are arranged in a laminated mode, wherein an air interlayer is formed between at least one group of adjacent plate structures at a certain distance, at least one plate structure in the adjacent plate structures provided with the air interlayer is a perforated sandwich plate, the perforated sandwich plate comprises a perforated surface plate, a sandwich layer and a back plate, the sandwich layer comprises a solid domain and an air domain, a plurality of perforations are distributed on the perforated surface plate, the perforated surface plate and the back plate are connected through the solid domain of the sandwich layer, and the perforations of the perforated surface plate penetrate through the air interlayer and the air domain of the sandwich layer. The utility model utilizes the perforated surface plates and the air domain of the sandwich layer to form an acoustic resonance structure, thereby realizing the acoustic resonance effect, further enabling the air domain surrounded by the adjacent plate structures provided with the air interlayer (comprising the air interlayer between the adjacent plate structures and the air domain of the sandwich layer) to have an ultra-normal equivalent volume modulus in a low-frequency broadband range, enabling the interaction between the two plates to be quite different from the interaction between the two plates of the traditional double-plate structure under the excitation of sound waves, and being capable of realizing the excellent sound insulation performance of the far-ultra-equal quality traditional double-plate structure and the equal-quality traditional single-plate structure in the low-frequency broadband range.
Further, the plate structures stacked in the present utility model are parallel to each other.
Further, in the perforated sandwich panel of the utility model, the air domain of the sandwich layer occupies not less than 30% of the volume of the sandwich layer. When the air domain ratio is too low, namely less than 30%, the sound insulation effect is not ideal enough, and the effect is poor.
Further, in the utility model, the adjacent plate structure provided with the air interlayer is taken as an integral structure, the two plate structures are respectively a first plate structure and a second plate structure, the distance between the first plate structure and the second plate structure is not excessively large in order to fully exert the effect of improving the sound insulation performance by the acoustic resonance effect, and the thickness of the air interlayer between the first plate structure and the second plate structure is not more than 80% of the integral thickness of the adjacent plate structure provided with the air interlayer.
Further, in the utility model, the thickness of the perforated skin, the hole penetration rate of the perforated skin, the hole penetration diameter of the perforated skin, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure affect the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, and the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure can be adjusted by changing the thickness of the perforated skin, the hole penetration rate of the perforated skin, the hole penetration diameter of the perforated skin, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure.
Further, in the present utility model, the solid domains in the sandwich layer are lattice structures distributed in a lattice manner, honeycomb structures distributed in a honeycomb manner, or corrugated plate structures distributed in a corrugated manner.
Further, in the present utility model, when the solid domain in the sandwich layer is a corrugated plate structure with corrugated distribution, a plurality of perforations penetrating through the upper and lower surfaces of the corrugated plate structure are arranged on the corrugated plate structure. Further, the shape and size of each perforation on the corrugated board structure may be the same, or may be partially the same, partially different, or may be different from each other.
Further, the air domain of the sandwich layer is partially filled with sound absorbing medium. The sound absorbing medium is selected from porous sound absorbing material with large porosity, such as foam porous material, fiber porous material, lattice porous material, and fiber porous material.
Further, the air interlayer is partially filled with sound absorption medium. The sound absorbing medium is selected from porous sound absorbing material with large porosity, such as foam porous material, fiber porous material, lattice porous material, and fiber porous material.
Compared with the prior art, the utility model has the beneficial technical effects that:
according to the utility model, an acoustic resonance structure can be formed by using the perforated surface plate and the air domain of the sandwich layer, under the condition that a Helmholtz resonator is not required to be additionally introduced, an acoustic resonance effect can be realized, and further, the air domain (comprising the air interlayer between adjacent plate structures and the air domain of the sandwich layer) surrounded by the adjacent plate structures provided with the air interlayer can have an ultra-normal equivalent bulk modulus in a low-frequency wide band range, so that the interaction between two plates under acoustic excitation is different from the interaction between two plates of a traditional double-plate structure, and the excellent sound insulation performance of a far-ultra-quality traditional double-plate structure and an equal-quality traditional single-plate structure can be realized in the low-frequency wide band range.
In particular, the adjacent plate structures provided with the air interlayer are taken as an integral structure, the two plate structures are respectively a first plate structure and a second plate structure, when the equivalent bulk modulus of an air domain surrounded by the first plate structure and the second plate structure is close to 0, the air domain surrounded by the first plate structure and the second plate structure is approximately equivalent to a vacuum state, and the excitation of sound waves to one plate structure hardly acts on the other plate structure through the air interlayer between the two plate structures, so that a remarkable sound insulation peak can appear at the frequency.
In addition, the perforated sandwich panel structure has the advantages of light weight and high bearing capacity, and the sandwich layer air domain plays the role of an acoustic resonance cavity.
The utility model does not need to additionally introduce acoustic devices such as Helmholtz resonators, mechanical local resonators and the like, has simple manufacturing process and low cost, can realize light weight and high bearing, has excellent low-frequency broadband sound insulation performance, and overcomes the defects in the background technology.
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 diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a sandwich layer physical domain (honeycomb structure) according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a sandwich layer structure (corrugated structure) according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a sandwich layer of physical domains (perforated corrugated structures) according to an embodiment of the utility model;
FIG. 5 is a schematic diagram of an embodiment of the present utility model;
FIG. 6 is a schematic diagram of an embodiment of the present utility model;
FIG. 7 is a normalized equivalent bulk modulus of an embodiment of the present utility model;
fig. 8 is a graph comparing the calculated result of the sound insulation amount of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, the calculated result of the sound insulation amount of the non-perforated traditional double-layer plate and the calculated result of the sound insulation amount of the single-layer plate structure with the quality determined by the law of sound insulation quality according to the embodiment of the utility model;
fig. 9 is a graph comparing the calculated result of the sound insulation amount of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, the calculated result of the sound insulation amount of the non-perforated traditional single-layer plate, and the calculated result of the sound insulation amount of the single-layer plate structure with the quality determined by the law of sound insulation quality according to the embodiment of the utility model;
fig. 10 is a sound insulation calculation result of a high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, a sound insulation calculation result of a traditional double-layer plate without perforation, and a sound insulation calculation result of a quality double-layer plate structure determined by a sound insulation quality law according to an embodiment of the present utility model.
The drawings are marked with the following description:
1. a first plate structure; 1-1, perforating a surface plate; 1-1a, a first perforation; 1-2, a sandwich layer; 1-2a, sandwich entity domain; 1-2b, sandwich air domain; 1-2c, a first sound absorbing medium; 1-2d, second perforation; 1-3, a backboard; 2. an air interlayer; 2-1, a second sound absorbing medium; 3. and a second plate structure.
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.
The utility model provides a high-load-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure which comprises at least two plate structures which are arranged in a laminated mode, wherein an air interlayer 2 is formed by a certain distance between at least one group of adjacent plate structures, at least one plate structure in the adjacent plate structures provided with the air interlayer 2 is a perforated sandwich plate, the perforated sandwich plate comprises a perforated surface plate 1-1, a sandwich layer 1-2 and a back plate 1-3, the sandwich layer 1-2 comprises a solid domain 1-2a and an air domain 1-2b, a plurality of first perforations 1-1a are distributed on the perforated surface plate 1-1, the perforated surface plate 1-1 and the back plate 1-3 are connected through the solid domain 1-2a of the sandwich layer 1-2, and the first perforations 1-1a on the perforated surface plate 1-1 penetrate through the air interlayer 2 and the air domain 1-2b of the sandwich layer 1-2.
It will be appreciated that the present utility model includes at least two plate structures arranged in a stacked manner, wherein the specific number of layers of the plate structures is not particularly limited, and those skilled in the art can reasonably arrange the plate structures according to the application scenario and common general knowledge, conventional technical means or personal experience in the art. The utility model provides an air interlayer 2 formed by spacing at least one group of adjacent plate structures, wherein at least one plate structure in the adjacent plate structures provided with the air interlayer 2 is a perforated sandwich plate, and the perforated sandwich plate is specifically arranged. If the adjacent plate structure provided with the air interlayer is regarded as a whole structure, the high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure provided by the utility model can be formed by laminating a plurality of adjacent plate structures provided with the air interlayer, and can also be formed by laminating high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structures of other plate structure types on the basis of the adjacent plate structures provided with the air interlayer. Of course, the technical personnel in the art can also coat the functional layer on the inner and outer side surfaces of the high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, which are all schemes which can be easily obtained by the technical personnel in the art according to the application requirements and the prior art.
Referring to fig. 1 without loss of generality, an embodiment of a high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure provided by the utility model comprises two plate structures which are arranged in a stacked manner, wherein the two plate structures are respectively a first plate structure 1 and a second plate structure 3, and the first plate structure 1 and the second plate structure 3 are parallel to each other. The air interlayer 2 is formed by separating the first plate structure 1 and the second plate structure 3 at a certain distance, at least one of the first plate structure 1 and the second plate structure 3 is a perforated sandwich plate, in the embodiment shown in fig. 1, the first plate structure 1 is a perforated sandwich plate, and the second plate structure 3 is a homogeneous plate. The perforated sandwich panel comprises a perforated surface plate 1-1, a sandwich layer 1-2 and a back plate 1-3, wherein the sandwich layer 1-2 comprises a physical domain 1-2a and an air domain 1-2b, a plurality of first perforations 1-1a are distributed on the perforated surface plate 1-1, the perforated surface plate 1-1 and the back plate 1-3 are connected through the physical domain 1-2a of the sandwich layer 1-2, and first perforations 1-1a on the perforated surface plate 1-1 penetrate through the air interlayer 2 and the air domain 1-2b of the sandwich layer 1-2. The distance between the second plate structure 3 and the perforated skin 1-1 is smaller than the distance between the second plate structure 3 and the back plate 1-3. The utility model utilizes the perforated surface plates and the air domain of the sandwich layer to form an acoustic resonance structure, thereby realizing the acoustic resonance effect, further enabling the air domain surrounded by the adjacent plate structures provided with the air interlayer (comprising the air interlayer between the adjacent plate structures and the air domain of the sandwich layer) to have an ultra-normal equivalent volume modulus in a low-frequency broadband range, enabling the interaction between the two plates to be quite different from the interaction between the two plates of the traditional double-plate structure under the excitation of sound waves, and being capable of realizing the excellent sound insulation performance of the far-ultra-equal quality traditional double-plate structure and the equal-quality traditional single-plate structure in the low-frequency broadband range.
In a preferred embodiment, the structure shown in FIG. 1 is employed, wherein the air domains 1-2b of the sandwich layer 1-2 occupy not less than 30% of the volume of the sandwich layer 1-2 in the perforated sandwich panel.
In a preferred embodiment, using the structure shown in fig. 1, if the first plate structure 1, the second plate structure 3 and the air interlayer 2 between the first plate structure 1 and the second plate structure 3 are taken as a whole structure, the thickness of the air interlayer 2 between the first plate structure 1 and the second plate structure 3 is not more than 80% of the total thickness of the whole structure formed by the first plate structure 1, the air interlayer 2 and the second plate structure 3 together.
According to the utility model, the thickness of the perforated surface plate, the perforation rate of the perforated surface plate, the perforation diameter of the perforated surface plate, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure influence the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, and the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure can be conveniently adjusted by changing parameters such as the thickness of the perforated surface plate, the perforation rate of the perforated surface plate, the perforation diameter of the perforated surface plate, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure. The technical scheme can be adopted by the technical personnel to design and obtain the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure with different low-frequency sound insulation performances.
The specific structure and distribution form of the entity domains 1-2a in the sandwich layer 1-2 are not limited, and the entity domains 1-2a shown in fig. 1 are lattice structures distributed in a lattice manner. The physical domains 1-2a shown in fig. 2 are honeycomb structures distributed in a honeycomb shape. The corrugated plate structure with the entity domains 1-2a in a corrugated distribution is shown in fig. 3. By the design, multi-order acoustic resonance can be introduced, and low-frequency sound insulation effect can be adjusted.
In a preferred embodiment, a structure shown in fig. 1 is adopted, wherein when the solid domains 1-2a in the sandwich layer 1-2 are corrugated structures, a plurality of second through holes 1-2d penetrating through the upper and lower surfaces of the corrugated structures are arranged on the corrugated structures, as shown in fig. 4. Further, the shape and size of each second perforation 1-2d on the corrugated board structure may be the same, or may be partially the same, partially different, or may be different from each other. The design is favorable for further widening the low-frequency high-efficiency sound insulation frequency band.
In a preferred embodiment, a structure shown in fig. 1 is employed, in which the air regions 1-2b of the sandwich layer 1-2 are partially filled with a first sound-absorbing medium 1-2c, as shown in fig. 5. By the design, the equivalent volume modulus can be adjusted in a larger range, the low-frequency sound insulation effect is improved, the system damping can be increased, and the sound insulation valley is lifted. The first sound absorption medium is made of porous sound absorption material with large porosity, and can be foam type porous material, fiber type porous material, lattice type porous material and fiber type porous material.
In a preferred embodiment, a structure shown in fig. 1 is adopted, wherein the air interlayer 1 is partially filled with a second sound absorbing medium 2-1, as shown in fig. 5. By the design, the equivalent volume modulus can be adjusted in a larger range, the low-frequency sound insulation effect is improved, the system damping can be increased, and the sound insulation valley is lifted. The second sound absorption medium is made of porous sound absorption material with large porosity, and can be foam type porous material, fiber type porous material, lattice type porous material and fiber type porous material.
As shown in fig. 6, an embodiment of a high-load-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure includes two plate structures stacked together, wherein the two plate structures are a first plate structure 1 and a second plate structure 3 respectively, and the first plate structure 1 and the second plate structure 3 are parallel to each other. The first plate structure 1 and the second plate structure 3 are separated by a certain distance to form an air interlayer 2, and the first plate structure 1 and the second plate structure 3 are perforated sandwich plates. The structural design and further optimized design of the perforated sandwich panel can be achieved by adopting the same design scheme/thought in any of the above embodiments, and will not be repeated here. When the second plate structure 3 is a perforated sandwich panel having the same characteristics as the first plate structure 1, the distance between the perforated skin of the second plate structure 3 and the perforated skin 1-1 of the first plate structure 1 is smaller than the distance between the perforated skin of the second plate structure 3 and the back plate 1-3 of the first plate structure 1.
The following provides two specific application embodiments, and the technical effects of the utility model are described by combining specific parameters and structural designs of the embodiments:
example of the application
A high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure is shown in a figure 1, wherein the geometric configuration of a solid domain 1-2a of a sandwich layer 1-2 in a first plate structure 1 is a lattice structure, as shown in the figure 1. The total thickness of the first plate structure 1 is 30mm, the thickness of the sandwich layer 1-2 is 25mm, and the solid domain 1-2a of the sandwich layer accounts for 96.5% of the volume of the sandwich layer 1-2. The perforation ratio of the perforated skin 1-1 was 0.65% and the perforation diameter was 2mm. The second plate structure 3 is a homogeneous plate with a thickness of 2mm. The thickness of the air interlayer 2 between the first plate structure 1 and the second plate structure 3 is 3mm, which is 8.6% of the total thickness of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure. The areal density of the first plate structure 1 was 6.9kg/m 2 The areal density of the second plate structure 3 was 3.4kg/m 2 . Applying periodic boundary strips during sound-insulating calculationAnd (3) a piece. For comparison, the rest parameters are the same as the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, but the double-layer structure of the surface plate without perforations is regarded as a traditional double-layer structure, and the sound insulation quantity is calculated.
Further, the calculation result of the normalized equivalent bulk modulus of the air domain enclosed by the first plate structure 1 and the second plate structure 3 in this embodiment is shown in fig. 7. It was found that the equivalent bulk modulus obtained was significantly different from that of air: the equivalent bulk modulus at 420Hz is approximately equal to 0; the real part of the equivalent bulk modulus is less than 0 in the frequency range of 420-1300 Hz; the imaginary part of the equivalent bulk modulus peaks at 1300 Hz. These extraordinary characteristics of equivalent bulk modulus will result in the high load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure of the present utility model having different sound insulation characteristics from the conventional two-layer plate structure. Fig. 8 compares the sound insulation calculation result of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, the sound insulation calculation result of the non-perforated traditional double-layer plate, and the sound insulation calculation result of the quality single-layer plate structure determined by the sound insulation quality law. As can be seen from the comparison chart: the sound insulation quantity of the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure is obviously higher than that of a single-layer plate structure with the same quality, which is determined by the sound insulation quantity of a traditional double-layer plate without perforation and the sound insulation quality law, in the low-frequency broadband range of 285-1260Hz, and the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure has obvious sound insulation peaks at the position of 420Hz (the equivalent bulk modulus is approximately equal to 0).
Specific application embodiment two:
a high-load-bearing and broadband sound-insulation and noise-reduction multifunctional integrated metamaterial structure is characterized in that a structure shown in figure 6 is adopted, and the geometric configuration of a solid domain 1-2a of a sandwich layer 1-2 in a first plate structure 1 is a pyramid-shaped lattice structure. The total thickness of the first plate structure 1 is 17.5mm, the thickness of the sandwich layer 1-2 is 12.5mm, and the solid domain 1-2a of the sandwich layer accounts for 96.5% of the volume ratio of the sandwich layer 1-2. The perforation ratio of the perforated skin 1-1 was 0.65% and the perforation diameter was 2mm. As shown in FIG. 6, a secondThe panel structure 3 is a perforated sandwich panel having the same characteristics as the first panel structure 1, except that the perforation rate of the perforated skin is 2 times the perforation rate of the skin of the first panel structure, the remaining structural parameters are the same as the first panel structure. The thickness of the air interlayer 2 between the first plate structure 1 and the second plate structure 3 is 4mm, which is 10.3% of the total thickness of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure. The areal density of the first plate structure 1 and the third plate structure 2 is 6.4kg/m 2 . For comparison, the rest parameters are the same as the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, but the double-layer structure of the surface plate without perforations is regarded as a traditional double-layer structure, and the sound insulation quantity is calculated.
Fig. 9 compares the results of calculating the sound insulation amount of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, the results of calculating the sound insulation amount of a traditional single-layer plate without perforation, and the results of calculating the sound insulation amount of a single-layer plate structure with the same quality determined by the law of sound insulation quality, which are provided by the embodiment. Fig. 10 compares the results of calculating the sound insulation amount of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, the results of calculating the sound insulation amount of the non-perforated traditional double-layer plate, and the results of calculating the sound insulation amount of the homogeneous double-layer plate structure determined by the law of sound insulation quality, which are provided in the embodiment. It can be found that the traditional double-layer plate structure has a sound insulation valley at low frequency, and the sound insulation quantity of the traditional double-layer plate structure at high frequency is higher than that determined by the sound insulation quality law; in the low-frequency ultra-wideband range of 255-1500Hz, the sound insulation quantity of the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure is obviously higher than that determined by a sound insulation quality law; in the low-frequency ultra-wideband range of 240-1245Hz, the sound insulation of the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure is obviously higher than that of the traditional double-layer structure. In addition, because the perforation parameters of the perforation surface plates of the first plate structure and the second plate structure are different, the double-layer high-bearing and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure has two remarkable sound insulation peaks, and the sound insulation quantity at the sound insulation peaks is far higher than that determined by a mass law.
The results of the two examples show that: the double-layer high-load-bearing and broadband sound-insulation and noise-reduction multifunctional integrated metamaterial structure can realize excellent sound insulation performance in a low-frequency broadband range without greatly increasing thickness and quality and without additionally introducing acoustic devices such as a Helmholtz resonator, a mechanical local resonator and the like. Meanwhile, the first plate structure in the embodiment is a light-weight high-bearing structure, so that the double-layer high-bearing and broadband sound-insulation noise-reduction multifunctional integrated metamaterial structure in the embodiment has the excellent mechanical property of light bearing.
The utility model is not a matter of the known technology.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure is characterized by comprising at least two plate structures which are arranged in a laminated mode, wherein an air interlayer is formed by a certain distance between at least one group of adjacent plate structures, at least one plate structure in the adjacent plate structures provided with the air interlayer is a perforated sandwich plate, the perforated sandwich plate comprises a perforated surface plate, a sandwich layer and a back plate, the sandwich layer comprises a solid domain and an air domain, a plurality of perforations are arranged on the perforated surface plate, the perforated surface plate and the back plate are connected through the solid domain of the sandwich layer, and the perforations of the perforated surface plate penetrate through the air interlayer and the air domain of the sandwich layer.
2. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure according to claim 1, wherein the stacked plate structures are parallel to each other.
3. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure according to claim 1, wherein in the perforated sandwich panel, the air domain of the sandwich layer accounts for not less than 30% of the volume ratio of the sandwich layer.
4. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure according to claim 1, 2 or 3, wherein the adjacent plate structures provided with the air interlayer are taken as a whole structure, the two plate structures are respectively a first plate structure and a second plate structure, and the thickness of the air interlayer between the first plate structure and the second plate structure is not more than 80% of the total thickness of the adjacent plate structures provided with the air interlayer.
5. The high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure as set forth in claim 4, wherein the thickness of the perforated skin, the hole penetration rate of the perforated skin, the hole penetration diameter of the perforated skin, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure affect the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure, and the low-frequency sound insulation performance of the high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure can be adjusted by changing the thickness of the perforated skin, the hole penetration rate of the perforated skin, the hole penetration diameter of the perforated skin, the thickness of the air interlayer, the thickness of the first plate structure and the thickness of the second plate structure.
6. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure according to claim 1, 2, 3 or 5, wherein the entity domains in the sandwich layer are lattice structures distributed in a lattice manner, honeycomb structures distributed in a honeycomb manner or corrugated plate structures distributed in a corrugated manner.
7. The high-load-bearing and broadband sound-insulating and noise-reducing multifunctional integrated metamaterial structure according to claim 6, wherein a plurality of through holes penetrating through the upper surface and the lower surface of the corrugated plate structure are arranged on the corrugated plate structure.
8. The high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure according to claim 6, wherein the shape and the size of each perforation on the corrugated plate structure are the same or different.
9. The high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure according to claim 1 or 2 or 3 or 5 or 7 or 8, wherein the air domain of the sandwich layer is partially filled with sound absorption medium.
10. The high-load and broadband sound insulation and noise reduction multifunctional integrated metamaterial structure according to claim 1 or 2 or 3 or 5 or 7 or 8, wherein the air interlayer is partially filled with sound absorption medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660238.1U CN219294903U (en) | 2023-03-30 | 2023-03-30 | High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660238.1U CN219294903U (en) | 2023-03-30 | 2023-03-30 | High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219294903U true CN219294903U (en) | 2023-07-04 |
Family
ID=86950193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320660238.1U Active CN219294903U (en) | 2023-03-30 | 2023-03-30 | High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219294903U (en) |
-
2023
- 2023-03-30 CN CN202320660238.1U patent/CN219294903U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8499887B2 (en) | Acoustically optimized cabin wall element | |
| CN204303339U (en) | A kind of compound sound-absorption structural | |
| CN205211409U (en) | Microperforated panel combines super materials compound sound absorbing structure of acoustics | |
| CN112779998B (en) | Full-band super-structure sound absorber | |
| CN103738037A (en) | Middle-low frequency sound insulation and heat insulation composite wall plate | |
| CN105821980A (en) | Sound-absorbing loading plate with hexagonal honeycomb-corrugation complex structure | |
| CN106182940B (en) | A kind of sound absorption loading plate based on honeycomb sandwich structure | |
| CN219294903U (en) | High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure | |
| CN109572105B (en) | Marine multilayer composite sound insulation structure | |
| CN208422400U (en) | A kind of noise isolating plate | |
| CN113753173A (en) | Sound insulation, vibration reduction and noise suppression multifunctional integrated metamaterial plate shell structure and preparation method thereof | |
| CN116394593A (en) | High-bearing and broadband sound-insulating and noise-reducing multifunctional metamaterial structure | |
| CN219225891U (en) | Composite multi-cell sound absorption structure | |
| CN114030247B (en) | Sound absorption and insulation light composite board based on acoustic black hole | |
| CN113066463B (en) | Sound absorption and insulation structure for controlling sound vibration of transformer oil tank, transformer oil tank and transformer | |
| CN106626545A (en) | Honeycombed vibrating-diaphragm-type lightweight metamaterial structure | |
| CN206484987U (en) | Honeycomb diaphragm-vibrating type lightweight metamaterial structure | |
| CN210271770U (en) | Multilayer perforated acoustic metamaterial sound absorption structure | |
| CN111341292A (en) | Perforated plate laminated sound absorption structure | |
| CN214491909U (en) | Phonon crystal sound insulation glass | |
| CN215170038U (en) | Highway tunnel segment that possesses sound absorption function | |
| CN216070578U (en) | Sound insulation and vibration reduction noise suppression multifunctional integrated metamaterial plate shell device | |
| CN216311323U (en) | Honeycomb sandwich panel of making an uproar falls | |
| CN117261364A (en) | High-load-bearing and low-frequency high-sound-insulation function integrated metamaterial structure and composite superstructure | |
| CN216475699U (en) | Assembled ultralow energy consumption is firm wall body for bedroom that keeps warm for building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |