Honeycomb film type periodic structure for sound insulation of partition wall

Abstract

The invention discloses a honeycomb film type periodic structure for sound insulation of a partition wall, the honeycomb film type periodic structure is a periodic structure obtained by closely arraying honeycomb type unit cell structures, each honeycomb type unit cell structure comprises a honeycomb structure, a film and a mass block, and the mass block is arranged on one side of the film and is in contact with the film. The honeycomb structure mainly depends on the combination of the unique geometric structure and the air cavity, and sound waves are diffracted and scattered when encountering the boundary of the honeycomb, so that the energy propagation is reduced. Meanwhile, the internal air cavity has a good sound absorption characteristic, and sound wave energy is dissipated into heat energy through reflection and interference phenomena. In addition, the resonance effect and the multi-layer design of the honeycomb film structure further optimize the sound insulation performance of different frequency bands, so that noise is effectively isolated in a wide frequency range. Compared with a traditional thin plate for sound insulation, the design structure has the advantages of being light in weight, high in strength, good in designability, multifunctional, simple in process and low in raw material cost.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration reduction and noise reduction, and in particular is a honeycomb film type periodic structure used for partition wall sound insulation. Background Art

[0002] Airborne sound transmission is a way of propagating noise through the enclosure structure in a residential building. Airborne sound transmission refers to the transmission of noise sources through air as a medium, and the sound energy is transmitted to another space through the enclosure structure. Typical airborne sound transmission includes traffic noise and living noise transmitted into the room through weak links such as windows and doors, as well as noise transmitted through partitions, especially lightweight partitions. As buildings develop towards lightness and large spaces, partitions can enrich the spatial form of large spaces, but many partitions are heavy, which increases the load of the structure, the material utilization rate is not high, and the construction is relatively complicated. Lightweight partitions have become the first choice for more and more building partitions due to their advantages of light weight, simple construction and low cost. However, sound can pass through lightweight partitions to affect the separated space, destroy the good spatial sound environment, and have a serious impact on people's lives. Therefore, how to select high sound insulation materials to design high sound insulation structures, that is, to ensure high sound insulation while reducing the space occupied by the sound insulation structure, has become the key to structural research in the sound insulation performance improvement plan.

[0003] Traditional lightweight partition walls refer to partition walls with thin components and low surface density. The surface density is generally 250kg / ㎡, and some are even only 5-30kg / ㎡. The improvement of the sound insulation of lightweight partition walls is based on the mass law. Increasing the surface density or thickness of the structure can improve the sound insulation. However, blindly increasing the thickness of the partition wall will occupy more indoor space and reduce the utilization rate of the space, which is contrary to the original intention of the building itself. At the same time, it will also increase the burden on the structure. This is the main problem of the single-layer sound insulation treatment method. At present, the academic community has greatly increased its attention to the research on the sound insulation performance of partition walls, and the research on various new types of building partition walls has also been strengthened. However, in general, almost all lightweight partition walls have the common problem of poor sound insulation performance, and it is difficult to meet the general standards of residential buildings (Rw≥45dB). This is mainly because the surface density of lightweight partition walls is relatively low and the thickness is thin, making it difficult to have a better guarantee for their sound insulation performance. Although there are many kinds of wall materials in my country at present, there are not many lightweight partition walls that really have excellent sound insulation performance and are widely used. Summary of the invention

[0004] In view of the defects or shortcomings of the honeycomb film type periodic structure, the purpose of the present invention is to provide a honeycomb film type periodic structure for partition wall sound insulation. The honeycomb structure mainly relies on its unique geometric structure and the combination of air cavities. When the sound wave encounters the boundary of the honeycomb, it diffracts and scatters, thereby reducing energy propagation. At the same time, the incident sound wave resonates in anti-phase with the film mass block to achieve the best sound insulation effect. This design structure also has the advantages of light weight, high strength, good designability, versatility, simple process and low raw material cost.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides a honeycomb film type periodic structure for partition wall sound insulation, which is a periodic structure obtained by a close array of honeycomb unit cell structures;

[0007] The honeycomb unit cell structure comprises a honeycomb structure, a film and a mass block, wherein the honeycomb structure takes its hexagonal surface as a symmetry surface and presents a symmetrical two-layer structure;

[0008] The film is in a tensioned state, connected to the symmetry plane of the honeycomb structure and coincides with the symmetry plane;

[0009] The mass block is spherical, and its diameter does not exceed the inner diameter of the inscribed circle of the honeycomb structure. The mass block is arranged on one side of the film and contacts the film.

[0010] Preferably, the side length of the honeycomb structure is 3.65 mm.

[0011] Preferably, the film is in an elastic tension state, the film is bonded to the honeycomb structure by special silicone adhesive, the film is made of silicone rubber film, and the thickness of the film is 0.25 mm.

[0012] Preferably, the mass block is made of stainless steel.

[0013] Preferably, the wall thickness of the honeycomb structure is 0.07 mm.

[0014] Preferably, the honeycomb structure may be one of aramid paper honeycomb, carbon fiber honeycomb, aluminum honeycomb and plastic honeycomb.

[0015] Preferably, the mass block is bonded to one side surface of the film by means of special silicone glue, and the mass block is located at the center of the honeycomb structure.

[0016] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0017] 1. The honeycomb structure of the present invention relies on its unique geometric structure. When the sound wave encounters the boundary of the honeycomb, diffraction and scattering will occur, thereby reducing energy transmission. Its internal air cavity can effectively prevent sound propagation, thereby achieving better sound insulation effect. The "spring-mass" system composed of the film mass can also be used to adjust the natural frequency of vibration, so as to achieve sound insulation effect within a specific frequency range.

[0018] 2. The honeycomb structure designed by the present invention is usually relatively light and has excellent mechanical properties. When subjected to external pressure or impact, the honeycomb structure can effectively disperse stress and improve the overall strength and rigidity.

[0019] 3. The honeycomb structure designed in the present invention has the advantage of designability. Its geometric shape and material can be customized and its physical properties can be adjusted according to specific needs to achieve the best sound insulation effect.

[0020] 4. Based on metamaterial design technology, the process of manufacturing honeycomb film-type sound insulation metamaterials is relatively simple and can adapt to different design requirements and production processes. The cost of raw materials is low, which makes it economical in commercial applications. Honeycomb films can also be combined with other functions, such as fire prevention and earthquake resistance, to meet complex application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 It is a schematic structural diagram of the honeycomb film type periodic structure body of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the honeycomb structure of the present invention.

[0024] Figure 3 It is a cross-sectional view of the honeycomb structure of the present invention.

[0025] Figure 4 The figure compares the simulation results of sound insulation between a honeycomb unit cell structure with periodic boundaries and a honeycomb film periodic structure with a diameter of 100 mm.

[0026] In the figure:

[0027] 100. Honeycomb film type periodic structure body;

[0028] 110. Honeycomb unit cell structure. 111. Honeycomb structure. 112. Thin film. 113. Mass block. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] like Figure 1-4 As shown, a honeycomb film type periodic structure for partition wall sound insulation is a periodic structure obtained by closely arraying honeycomb type unit cell structures 110. The honeycomb film unit cell structure 110 is arrayed to obtain a periodic structure of a honeycomb film with a diameter of 100 mm;

[0033] The honeycomb type unit cell structure 110 includes a honeycomb structure 111, a film 112 and a mass block 113, wherein the honeycomb structure 111 takes its hexagonal face as a symmetry plane and presents a symmetrical two-layer structure, and the double-layer honeycomb structure 111 is two regular hexagonal structures with the same height. When the sound wave enters the honeycomb structure 111 with the mass block 113 inside along a certain direction and propagates, the geometric shape and pores of the honeycomb structure 111 can cause the sound wave to diffract and scatter during the propagation process. When the sound wave encounters the boundary of the honeycomb, it will be reflected and scattered, thereby weakening the energy of the sound wave and achieving a sound insulation effect. The air cavity in the honeycomb dissipates the energy of the sound wave inside and converts it into heat energy, thereby reducing the propagation of the sound wave. At the same time, when the film 112 and the mass block 113 resonate in anti-phase with the sound wave, their natural vibration frequency can be adjusted, so as to achieve a sound insulation effect within a specific frequency range;

[0034] The film 112 is in a tensioned state, connected to the symmetry plane of the honeycomb structure 111 and coincides with the symmetry plane;

[0035] The mass block 113 is spherical, and its diameter does not exceed the inner diameter of the inscribed circle of the honeycomb structure 111 . The mass block 113 is disposed on one side of the film 112 and contacts the film 112 .

[0036] The side length of the honeycomb structure 111 is 3.65 mm.

[0037] The film 112 is in a tensioned state, and the film 112 and the honeycomb structure 111 are bonded and connected by special silicone adhesive. The film 112 is made of silicone rubber film 112, and the thickness of the film 112 is 0.25 mm.

[0038] The mass block 113 is made of stainless steel.

[0039] The wall thickness of the honeycomb structure 111 is 0.07 mm.

[0040] The honeycomb structure 111 may be one of aramid paper honeycomb, carbon fiber honeycomb, aluminum honeycomb and plastic honeycomb.

[0041] The mass block 113 is bonded to one side surface of the film 112 by using special silicone adhesive, and the mass block 113 is located at the center of the honeycomb structure 111 .

[0042] like Figure 4 As shown, the sound insulation effect of the honeycomb unit cell structure 110 and the honeycomb film type periodic structure body 100 are simulated and compared. It can be seen that the sound insulation of the honeycomb unit cell structure 110 and the honeycomb film type periodic structure body 100 is basically equal in the range of 50Hz to 5000Hz. This shows that in practical applications, the honeycomb unit cell structure 110 can obtain a honeycomb film type periodic structure body 100 with the same sound insulation through a simple array.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A honeycomb film type periodic structure for partition wall sound insulation, characterized in that: It is a periodic structure obtained by a close array of honeycomb unit cell structures (110); The honeycomb unit cell structure (110) comprises a honeycomb structure (111), a film (112) and a mass block (113), wherein the honeycomb structure (111) takes its hexagonal surface as a symmetry surface and presents a symmetrical two-layer structure; The film (112) is in a tensioned state, connected to the symmetry plane of the honeycomb structure (111) and coincides with the symmetry plane; The mass block (113) is spherical, and its diameter does not exceed the inner diameter of the inscribed circle of the honeycomb structure (111). The mass block (113) is arranged on one side of the film (112) and is in contact with the film (112).

2. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The side length of the honeycomb structure (111) is 3.65 mm, and the diameter of the honeycomb film type periodic structure (100) is 100 mm.

3. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The film (112) is in a tensioned state, and the film (112) and the honeycomb structure (111) are bonded and connected by special silicone adhesive. The film (112) is made of silicone rubber film (112), and the thickness of the film (112) is 0.25 mm.

4. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The mass block (113) is made of stainless steel.

5. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The wall thickness of the honeycomb structure (111) is 0.07 mm.

6. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The honeycomb structure (111) may be one of an aramid paper honeycomb, a carbon fiber honeycomb, an aluminum honeycomb and a plastic honeycomb.

7. The honeycomb film type periodic structure for partition wall sound insulation according to claim 1, characterized in that: The mass block (113) is bonded to one side surface of the film (112) by means of special silicone glue, and the mass block (113) is located at the center of the honeycomb structure (111).

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