Double-sided noise reduction and heat preservation structure based on acoustic black hole effect
By combining the acoustic black hole effect with the design of damping and insulation layers, the problem of noise reduction and heat preservation in buildings and vehicles is solved, achieving both noise reduction and heat preservation effects, and is applicable to buildings, vehicles and other fields.
Patent Information
- Application Number
- CN202422807623.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Existing technologies struggle to simultaneously achieve effective noise reduction and thermal insulation in buildings and vehicles. Traditional methods increase costs or result in low space utilization, and their effectiveness in suppressing low-frequency noise is limited.
A double-sided noise reduction and heat preservation structure based on the acoustic black hole effect is designed, including a uniform flat plate, an acoustic black hole plate, a damping layer and a heat preservation layer. The noise reduction and heat preservation effects are achieved by using the gradient cross section design of the acoustic black hole plate and the damping layer to absorb and dissipate the sound wave energy, combined with high thermal resistance materials.
It achieves effective sound wave capture and attenuation in both directions, provides good thermal insulation performance, is suitable for environments requiring bidirectional noise control, and its modular design facilitates installation and maintenance.
Smart Images
Figure CN223462006U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of noise reduction technology, and specifically relates to a double-sided noise reduction and heat preservation structure based on acoustic black hole effect. BACKGROUND
[0002] With the acceleration of industrialization and urbanization, noise pollution and energy loss problems are becoming increasingly serious, especially in the fields of construction, transportation and industry, which pose significant challenges to environmental sustainability.
[0003] In the field of construction, traditional soundproofing and heat preservation materials improve performance by increasing their thickness, but this method not only increases construction costs and reduces space utilization, but also has limited effect on reducing low-frequency noise, the most common type of noise in urban environments. In addition, these materials usually do not have noise reduction functions, requiring additional soundproofing measures, which increases the complexity and cost of construction.
[0004] In the field of vehicle manufacturing, noise generated during vehicle operation affects passenger comfort and can cause noise pollution to the surrounding environment. Although existing vehicles use sound-absorbing materials and soundproofing panels to reduce noise, these methods increase the weight and cost of the vehicle, and have limited effect on suppressing low-frequency noise.
[0005] In recent years, acoustic black hole structures are commonly used in the fields of vibration noise control, sound wave regulation and high-efficiency energy recovery. Acoustic black holes are designed with wedge-shaped structures with gradually changing cross-sections, so that the propagation speed of sound waves inside the structure gradually decreases, eventually reaching zero speed at the end of the structure, achieving sound wave capture and attenuation, effectively reducing sound wave reflection and transmission, and achieving the purpose of noise reduction.
[0006] Although acoustic black hole technology shows potential in noise reduction, most existing structures only focus on acoustic performance, ignoring the integration of other functions such as heat preservation. In the fields of construction and vehicle manufacturing, structures are usually required to have both noise reduction and heat preservation functions. However, due to their special design, existing acoustic black hole structures are difficult to combine with existing heat preservation materials, limiting their application range. SUMMARY
[0007] In order to overcome the deficiencies of the prior art, the present application provides a double-sided noise reduction and heat preservation structure based on acoustic black hole effect, comprising two parallel arranged uniform flat plates, two acoustic black hole plates connected to the upper end surfaces of the uniform flat plates, a damping layer connected to the lower end surface of the acoustic black hole plate, and two heat preservation layers filled between the uniform flat plate and the acoustic black hole plate. The upper end surface of the acoustic black hole plate has two mutually perpendicular intersecting acoustic black hole grooves, which are connected to the surface of the uniform flat plate through a table-shaped protrusion, concentrating the sound wave energy inside the uniform flat plate, and absorbing and dissipating the sound wave energy through the damping layer. The heat preservation layer can effectively block heat transfer and provide heat preservation performance. The structure is suitable for applications such as buildings, vehicles, ships and other applications requiring noise reduction and heat preservation, and has the advantages of efficient sound wave absorption, heat insulation performance and modular design, facilitating installation and maintenance.
[0008] The technical solution adopted by the present application to solve its technical problems is as follows:
[0009] A double-sided noise reduction and heat preservation structure based on acoustic black hole effect, comprising two parallel arranged uniform flat plates;
[0010] Two acoustic black hole plates located between the uniform flat plates, the upper end surfaces of the two acoustic black hole plates being connected to the uniform flat plates respectively;
[0011] A damping layer located between the two acoustic black hole plates, the two end surfaces of the damping layer being connected to the lower end surfaces of the two acoustic black hole plates respectively;
[0012] Two heat preservation layers located between the uniform flat plate and the upper end surface of the acoustic black hole plate.
[0013] Preferably, the uniform flat plate is a cuboid plate structure, and the upper and lower surfaces thereof are square planes.
[0014] Preferably, the acoustic black hole plate is a square plate structure, and has two mutually perpendicular intersecting acoustic black hole grooves distributed along the center line of the square plate, and a table-shaped protrusion at each of the four vertices of the two mutually perpendicular intersecting acoustic black hole grooves; adjacent two table-shaped protrusions to the center of the square plate and the midpoint of the edge of the acoustic black hole plate are uniformly concave; and the lower end surface of the acoustic black hole plate is a uniform plane.
[0015] Preferably, the acoustic black hole grooves and table-shaped protrusions on the upper end surface of the acoustic black hole plate are designed to form a lowest point at the center of the plate body, dividing the plate body into four parts; the heights of the table-shaped protrusions in each part are consistent and connected to the surface of the uniform flat plate.
[0016] Preferably, the damping layer is a square plate structure, and has the same width as the uniform flat plate.
[0017] Preferably, the heat preservation layer is filled in the space between the uniform flat plate and the upper end face of the acoustic black hole plate connected with the uniform flat plate.
[0018] Preferably, the material of the uniform flat plate and the acoustic black hole plate is metal material, polyurethane material or engineering plastic.
[0019] Preferably, the material of the damping layer is rubber, foamed plastic or high-damping alloy.
[0020] Preferably, the material of the heat preservation layer is polyurethane foam, glass wool or aerogel.
[0021] The beneficial effects of the present application are as follows:
[0022] 1. Based on the acoustic black hole effect, the present application realizes effective capture and attenuation of sound waves in two directions, better realizes the effect of vibration and noise reduction, and is suitable for environments that need to control noise on both sides.
[0023] 2. The two heat preservation layers arranged in the structure of the present application adopt high thermal resistance performance materials, effectively block heat transfer, reduce heat loss, provide good heat preservation effect, help to maintain the temperature stability of indoor or vehicle, and reduce energy consumption.
[0024] 3. The present application combines acoustic performance and thermal performance together in the structure design, provides a multifunctional solution; at the same time, the modular design makes each component can be easily assembled and disassembled, convenient for installation and maintenance, improves the maintenance efficiency and service life. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a structural schematic diagram of the present application;
[0026] Figure 2 is a structural schematic diagram of the uniform flat plate of the present application;
[0027] Figure 3 is a structural schematic diagram of the acoustic black hole plate of the present application;
[0028] Figure 4 is a cross-sectional schematic diagram of the acoustic black hole plate of the present application;
[0029] Figure 5 is a structural schematic diagram of the acoustic black hole plate connecting the uniform flat plate of the present application;
[0030] Figure 6 is a structural schematic diagram of the damping layer connecting the acoustic black hole plate of the present application;
[0031] Figure 7 is a structural schematic diagram of the heat preservation layer filled between the acoustic black hole plate and the uniform flat plate of the present application.
[0032] Reference numerals:
[0033] 1. Uniform flat plate; 2. Acoustic black hole plate; 2-1. Acoustic black hole groove; 2-2. Concave protrusion; 2-3. Concave arc surface; 3. Damping layer; 4. Insulation layer. DETAILED DESCRIPTION
[0034] The present invention will be further described below with reference to the accompanying drawings and examples.
[0035] The present invention aims to provide a double-sided noise-reduction and thermal insulation structure based on the acoustic black hole effect, aiming to address the existing problem of the inability to achieve both noise reduction and thermal insulation. Through innovative structural design, the present invention achieves an organic combination of acoustic and thermal performance, meeting the dual requirements of noise reduction and thermal insulation in fields such as construction, transportation, and industry.
[0036] In order to achieve the above object, the present invention provides the following technical solutions:
[0037] like Figure 1 As shown, a double-sided noise reduction and thermal insulation structure based on the acoustic black hole effect includes two uniform flat plates 1, two acoustic black hole plates 2, a damping layer 3, and two thermal insulation layers 4.
[0038] like Figure 2 As shown, the uniform plate 1 is a rectangular plate structure, and its upper and lower surfaces are continuously distributed along the x and y directions to form a square plane.
[0039] like Figure 3 As shown, the acoustic black hole plate 2 is a square plate structure with the same width as the uniform flat plate 1. Two mutually perpendicular acoustic black hole grooves 2-1 are distributed on the upper end surface along the center line of the square plate. At the four vertices of the two mutually perpendicular acoustic black hole grooves are square table-shaped protrusions 2-2. From the table-shaped protrusion to the center of the square plate and the midpoint of the side length is a uniform concave arc surface 2-3; the lower end surface is a uniform plane.
[0040] like Figure 3 As shown, the acoustic black hole groove 2-1 and the terraced protrusion 2-2 on the upper end surface of the acoustic black hole plate 2 are designed so that the lowest point is formed at the center of the plate body, dividing the plate body into four parts. The terraced protrusions of each part have the same height and are connected to the uniform flat surface.
[0041] like Figure 4 As shown, the acoustic black hole plate 2 has a concave arc surface with an arc angle of 2-3 from the top end surface of the plate to the lowest point in the center. The thickness change in the x direction is calculated by the following formula:
[0042]
[0043] The change in thickness in the y direction is calculated by the following formula:
[0044]
[0045] As shown in Figure 5 , the upper end face of the acoustic black hole plate 2 is connected to the surface of the uniform flat plate 1 through a table-shaped protrusion 2-2.
[0046] As shown in Figure 6 , the damping layer 3 is a square plate structure, which is the same width as the uniform flat plate 1, and is connected to the uniform plane of the lower end face of the acoustic black hole plate 2.
[0047] As shown in Figure 7 , the thermal insulation layer 4 is filled in the space between the uniform flat plate 1 and the upper end face of the corresponding acoustic black hole plate 2.
[0048] The material of the uniform flat plate and the acoustic black hole plate is metal material, polyurethane material or engineering plastic; the material of the damping layer is rubber, foamed plastic or high-damping alloy; the material of the thermal insulation layer is polyurethane foam, glass wool or aerogel.
[0049] The structure can be formed by assembling the uniform flat plate, the acoustic black hole plate, the damping layer and the thermal insulation layer.
[0050] The structure is suitable for buildings, vehicles, ships or other application scenarios that require noise reduction and thermal insulation.
[0051] The working principle of the present application is:
[0052] 1. The acoustic black hole plate adopts a power-law varying cross-section design, which makes the speed of sound gradually slow down in the process of propagation inside the plate, until it approaches zero at the end of the structure. This gradual design leads to the concentration of sound wave energy in the central region of the black hole plate, effectively capturing sound waves and achieving significant noise reduction effect.
[0053] 2. The damping layer is composed of high-performance viscoelastic material, when the sound wave reaches the damping layer, its viscoelastic properties promote the conversion of sound wave energy into heat energy. This process significantly reduces the reflection and transmission of sound waves, further reduces the propagation of noise and enhances the noise reduction performance of the overall structure.
[0054] 3. The thermal insulation layer is selected from high thermal resistance materials such as polyurethane foam, glass wool or calcium silicate insulation materials, which have low thermal conductivity and effectively prevent heat transfer, reduce heat loss and provide excellent thermal insulation effect.
Claims
1. A double-sided noise reduction thermal insulation structure based on acoustic black hole effect, characterized in that, The uniform flat plate is a cuboid plate structure, and the upper and lower surfaces thereof are square planes. The acoustic black hole plate is a square plate structure, and the upper end surface thereof is provided with two acoustic black hole grooves which are perpendicular to each other along the direction of the center line of the square plate. The two thermal insulation layers are respectively arranged between the uniform flat plate and the upper end surface of the acoustic black hole plate. The uniform flat plate is a cuboid plate structure, and the upper and lower surfaces thereof are square planes.
2. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The acoustic black hole plate is a square plate structure, and the upper end surface thereof is provided with two acoustic black hole grooves which are perpendicular to each other along the direction of the center line of the square plate.
3. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The two thermal insulation layers are respectively arranged between the uniform flat plate and the upper end surface of the acoustic black hole plate.
4. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The uniform flat plate is a cuboid plate structure, and the upper and lower surfaces thereof are square planes.
5. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The acoustic black hole plate is a square plate structure, and the upper end surface thereof is provided with two acoustic black hole grooves which are perpendicular to each other along the direction of the center line of the square plate.
6. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The two thermal insulation layers are respectively arranged between the uniform flat plate and the upper end surface of the acoustic black hole plate.
7. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The uniform flat plate and the acoustic black hole plate are made of metal material, polyurethane material or engineering plastic.
8. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The damping layer is made of rubber, foamed plastic or high-damping alloy.
9. The double-sided noise reduction thermal insulation structure based on acoustic black hole effect according to claim 1, characterized in that, The thermal insulation layer is made of polyurethane foam, glass wool or aerogel.