Acoustic metamaterial vibration and noise reduction structure
By leveraging the synergistic effect of multiple components in the acoustic metamaterial vibration reduction and noise reduction structure, the problem of the single noise absorption and vibration attenuation mechanism of existing materials is solved, achieving comprehensive and efficient elimination and deep absorption of different types of noise and vibration, and meeting the needs of multiple scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2026-03-17
- Publication Date
- 2026-07-14
AI Technical Summary
Existing vibration damping and noise reduction materials have relatively simple noise absorption and vibration attenuation mechanisms, which are difficult to meet the elimination needs of different types of noise and vibration. Furthermore, the absorption is not deep enough and the attenuation is not thorough enough, resulting in significant limitations.
The acoustic metamaterial vibration reduction and noise reduction structure employs multiple components, including a substrate, a vibration reduction and noise reduction layer, a resonant cavity, an absorption layer, and a protective layer, which work together to achieve comprehensive control of vibration and noise through various mechanisms such as buffering, resonance, absorption, and dissipation.
It achieves comprehensive and efficient elimination of different types of noise and vibration, improves vibration reduction and noise reduction effect, meets the needs of multiple scenarios, and improves the flexibility of use and cost control through precise positioning installation and multi-layer structure design.
Smart Images
Figure CN122392473A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of noise reduction materials technology, and more specifically, relates to an acoustic metamaterial vibration reduction and noise reduction structure. Background Technology
[0002] Vibration and noise are unavoidable in industrial production, daily life, and the operation of various equipment. These vibrations and noises not only affect the operational stability of related equipment and shorten its service life, but also interfere with the surrounding environment and thus affect human health.
[0003] Current vibration damping and noise reduction materials still have the following shortcomings: The existing noise absorption and vibration attenuation mechanisms are relatively simple, lacking structures to eliminate different types of noise and vibration. The noise absorption is not deep enough and the vibration attenuation is not thorough enough, making it difficult to meet the high-efficiency requirements for vibration reduction and noise reduction in various scenarios, and thus having certain limitations. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides an acoustic metamaterial vibration reduction and noise reduction structure. This structure addresses the limitations of existing structures, which have relatively simple noise absorption and vibration attenuation mechanisms, lack structures for eliminating different types of noise and vibration, and suffer from insufficient noise absorption and incomplete vibration attenuation. These limitations make it difficult to meet the high-efficiency requirements for vibration reduction and noise reduction in various scenarios.
[0005] The purpose and effect of the acoustic metamaterial vibration reduction and noise reduction structure of this invention are achieved by the following specific technical means: An acoustic metamaterial vibration reduction and noise reduction structure includes: a substrate; the substrate adopts a rectangular plate structure, and through-hole mounting screw holes are formed in a rectangular array on the substrate, and the substrate is made of lightweight aluminum alloy; a vibration reduction and noise reduction layer is fixedly disposed on the top of the substrate, and the vibration reduction and noise reduction layer adopts a rectangular plate structure, and through-hole mounting screw holes are formed in a rectangular array on the vibration reduction and noise reduction layer, and the vibration reduction and noise reduction layer is made of nitrile rubber; a resonant cavity is arranged in a rectangular array above the vibration reduction and noise reduction layer, the resonant cavity adopts an internally controlled rectangular block structure, and a rectangular groove structure is formed in the middle of the bottom of the resonant cavity.
[0006] Furthermore, a rectangular block structure is fixedly arranged above the vibration damping and noise reduction layer in a rectangular array, and the size of the lower positioning block matches the size of the rectangular groove at the bottom of the resonant cavity.
[0007] Furthermore, a set of resonance holes are provided around the resonant cavity. The resonance holes adopt a through-hole circular groove structure, and the inner wall of the resonance holes adopts a stepped structure. The diameter of the inner circular groove of the resonance hole is smaller than the diameter of the outer circular groove.
[0008] Furthermore, a cross-shaped rod structure support member is fixedly connected inside the resonant cavity, and the support member is made of elastic material; a spherical resonant block is fixedly installed in the middle of the support member, and the resonant block is made of metal material; a rectangular block structure upper positioning block is fixedly installed in the middle of the upper part of the resonant cavity.
[0009] Furthermore, a rectangular plate-structured absorption layer is connected above the resonant cavity, and a rectangular groove structure is formed in a rectangular array at the bottom of the absorption layer. The size of the rectangular groove at the bottom of the absorption layer matches the size of the upper positioning block. A wave-shaped groove structure is formed above the absorption layer, and a through-type circular slot structure is formed at equal intervals on the inner side of the absorption layer. A cylindrical absorption block is fixedly set in the circular slot of the absorption layer, and a through-type honeycomb slot structure is formed inside the absorption block. The absorption block is made of melamine sponge material.
[0010] Furthermore, a rectangular plate structure protective layer is fixedly disposed above the absorbent layer, and the top of the protective layer is provided with a hemispherical protrusion structure in a rectangular array. The protective layer is made of lightweight aluminum alloy material.
[0011] Compared with the prior art, the present invention has the following beneficial effects: This structure achieves comprehensive and efficient control of vibration and noise through the synergistic action of multiple components and mechanisms. The vibration damping and noise reduction layer can initially buffer and attenuate vibration, while the resonant cavity, support components, and resonant blocks work together to achieve further resonance dissipation of vibration. The absorption layer and absorption blocks achieve initial absorption and deep dissipation of noise, and the protective layer helps to weaken the propagation of noise. All components work together to form a complete vibration damping and noise reduction structure, effectively solving the problems of poor vibration damping and noise reduction effect and single mechanism in existing structures, and meeting the needs for eliminating different types of noise and vibration.
[0012] By cooperating with the lower positioning block and the rectangular groove at the bottom of the resonant cavity, and with the upper positioning block and the rectangular groove at the bottom of the absorption layer, the resonant cavity, the vibration damping and noise reduction layer, and the absorption layer are precisely positioned and installed. This allows for adjustments to the number of installations as needed, making the application more flexible and better meeting the requirements of different environments, while also providing better control over operating costs. Attached Figure Description
[0013] Figure 1 This is a frontal three-dimensional schematic diagram of the present invention.
[0014] Figure 2 This is a top view schematic diagram of the overall structure of the present invention.
[0015] Figure 3 This is a schematic diagram of the overall bottom view of the present invention.
[0016] Figure 4This is a schematic diagram of the overall disassembled structure of the present invention.
[0017] Figure 5 This is a schematic diagram of the disassembled structure of the absorption layer and absorption block of the present invention.
[0018] Figure 6 This is a schematic diagram of the resonant cavity structure of the present invention.
[0019] Figure 7 This is a cross-sectional view of the resonant cavity of the present invention.
[0020] Figure 8 This is the invention Figure 5 A magnified schematic diagram of part A in the diagram.
[0021] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Substrate; 101. Vibration damping and noise reduction layer; 102. Lower positioning block; 103. Resonance cavity; 104. Resonance hole; 105. Support component; 106. Resonance block; 107. Upper positioning block; 108. Absorption layer; 109. Absorption block; 110. Protective layer. Detailed Implementation
[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.
[0023] Example 1: As shown in the attached document Figure 1 To be continued Figure 8 As shown: This invention provides an acoustic metamaterial vibration reduction and noise reduction structure, comprising: a substrate 1; the substrate 1 adopts a rectangular plate structure, and a through-hole structure with a rectangular array of through-holes is formed on the substrate 1. This through-hole structure is used to fix the entire vibration reduction and noise reduction structure to an external mounting base. The substrate 1 is made of lightweight aluminum alloy, which ensures the structural support strength while effectively reducing the overall weight of the structure, facilitating installation and transportation; a vibration reduction and noise reduction layer 101 is fixedly disposed on the top of the substrate 1. The vibration reduction and noise reduction layer 101 is tightly fitted to the substrate 1, playing a buffering and vibration reduction role, and can initially absorb and attenuate the vibration energy transmitted to the substrate 1. The vibration reduction and noise reduction layer 101 adopts a rectangular plate structure, and a through-hole structure with a rectangular array of through-holes is formed on the vibration reduction and noise reduction layer 101. The through-hole mounting structure and the vibration damping and noise reduction layer 101 are made of nitrile rubber material, which utilizes its own elastic properties to further enhance the buffering and vibration reduction effect. The vibration damping and noise reduction layer 101 is arranged in a rectangular array above the resonant cavity 103. As one of the core components of vibration damping and noise reduction, the resonant cavity 103 is used to absorb and dissipate noise energy through resonance to achieve noise attenuation. The resonant cavity 103 adopts an internally controlled rectangular block structure. The hollow structure can provide space for the resonance dissipation of noise and enhance the noise absorption effect. The bottom center of the resonant cavity 103 has a rectangular groove structure. This rectangular groove structure is used to realize the positioning connection between the resonant cavity 103 and the components below, ensuring that the resonant cavity 103 can be accurately installed in the preset position and avoiding installation misalignment.
[0024] A rectangular plate-structured absorption layer 108 is connected above the resonant cavity 103 to further absorb and attenuate noise processed by the resonant cavity 103, improving the overall vibration reduction and noise reduction effect. The bottom of the absorption layer 108 has a rectangular array of recessed grooves, the size of which matches the size of the upper positioning block 107. A wavy groove structure is formed above the absorption layer 108. This wavy groove structure increases the contact area between the absorption layer 108 and external noise, extends the noise propagation path, and enhances the noise reflection and absorption effect. The inner side of the absorption layer 108 has a through-type circular groove structure arranged at equal intervals; a cylindrical absorption block 109 is fixedly installed in the circular groove of the absorption layer 108, and the absorption block 109 has a through-type honeycomb groove structure inside. The honeycomb groove structure can greatly increase the internal surface area of the absorption block 109, enhance the noise adsorption and dissipation ability, so that the noise can be reflected and absorbed multiple times in the honeycomb groove until the energy is completely dissipated. The absorption block 109 is made of melamine sponge material, which utilizes its excellent sound absorption performance to further improve the noise absorption effect.
[0025] The absorber layer 108 is fixedly provided with a rectangular plate structure protective layer 110 above it to protect the absorber layer 108, resonant cavity 103 and other components below, preventing them from being corroded by external impacts, dust, humidity and other factors, thus extending the service life of the entire structure. The top of the protective layer 110 is provided with a hemispherical protrusion structure in a rectangular array. This hemispherical protrusion structure can change the propagation direction of external noise, reduce the direct reflection of noise, and at the same time play a certain buffering role, reducing the impact of external impacts on the components below. The protective layer 110 is made of lightweight aluminum alloy material.
[0026] The specific usage and function of this embodiment are as follows: The remaining noise enters the absorption layer 108 region. The wavy groove structure on the upper surface of the absorption layer 108 increases the contact area with the noise, causing the noise to reflect and interfere multiple times within the grooves, achieving initial noise dissipation and absorption. Some noise enters the absorption block 109 through the through-slots inside the absorption layer 108. The honeycomb-shaped through-slot structure inside the absorption block 109 further increases the propagation path and contact area of the noise, causing the noise to continuously reflect, rub, and dissipate within the honeycomb channels, completing deep absorption of the noise. Finally, when the noise is discharged through the protective layer 110, the hemispherical protrusion structure at the top of the protective layer 110 can scatter and guide the incident noise, changing the direct propagation path of the noise and further weakening the propagation intensity of the noise, thus completing the entire noise reduction and vibration damping process.
[0027] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 8 As shown: The upper part of the vibration damping and noise reduction layer 101 is fixedly arranged with a rectangular block structure of lower positioning block 102 in a rectangular array. The size of the lower positioning block 102 matches the size of the rectangular groove at the bottom of the resonant cavity 103, so that the rectangular groove at the bottom of the resonant cavity 103 can be accurately fitted onto the lower positioning block 102, realizing the rapid positioning and installation of the resonant cavity 103. At the same time, it enhances the connection stability between the resonant cavity 103 and the vibration damping and noise reduction layer 101, and prevents the resonant cavity 103 from shifting or shaking during use.
[0028] The resonant cavity 103 has a set of resonant holes 104 on all four sides. The resonant holes 104 are used to allow external noise to enter the resonant cavity 103, so that the internal structure of the resonant cavity 103 can absorb and dissipate the noise. The resonant holes 104 adopt a through-hole circular slot structure, and the inner wall of the resonant holes 104 adopts a stepped structure. This stepped structure can change the propagation path of the noise, prolong the propagation time of the noise in the resonant holes 104, enhance the reflection and dissipation effect of the noise, and further improve the noise absorption capacity. The diameter of the inner circular slot of the resonant hole 104 is smaller than the diameter of the outer circular slot.
[0029] The resonant cavity 103 is internally fixedly connected to a cross-shaped rod structure support member 105, which is made of elastic material. The support member 105 is used to support and fix the resonant block 106, and at the same time plays a role in transmitting vibration energy, transferring the vibration energy absorbed by the resonant cavity 103 to the resonant block 106. A spherical resonant block 106 is fixedly installed in the middle of the support member 105, and the resonant block 106 is made of metal material. A rectangular block structure upper positioning block 107 is fixedly installed in the middle of the upper part of the resonant cavity 103. The upper positioning block 107 is used to realize the positioning connection between the resonant cavity 103 and the upper absorption layer 108, and to provide a positioning reference for the installation of the absorption layer 108.
[0030] The specific usage and function of this embodiment are as follows: In this invention, the substrate 1 is fixedly connected to the external device or base to be vibration-damped or noise-reduced via mounting screw holes, ensuring the overall structure is stably installed at the target position. A suitable number of resonant cavities 103 are installed according to noise reduction requirements. The resonant cavities 103 are installed between the vibration-damping and noise-reducing layer 101 and the absorption layer 108 through the engagement of the lower positioning block 102 with the rectangular groove above the resonant cavity 103 and the upper positioning block 107 with the rectangular groove at the bottom of the absorption layer 108. When external noise vibrations are transmitted along the mounting base into the structure, the vibration energy is first transmitted to the substrate 1 and then upwards to the vibration-damping and noise-reducing layer 101. The vibration-damping and noise-reducing layer 101 uses its own rubber material properties to initially buffer and attenuate the vibration, absorbing and dissipating a portion of the vibration energy, reducing the amplitude of the vibration transmitted to the upper layers of the structure. The first stage of vibration damping involves the vibration that is not completely attenuated continuing to propagate upwards to the resonant cavity 103. This vibration then enters the internal cavity of the resonant cavity 103 through the resonant holes 104 around its perimeter. The resonant holes 104 employ a stepped through-slot structure, which extends the propagation path of the noise within the holes and increases the dissipation of noise energy. After entering the resonant cavity 103, the vibration excitation acts on the support member 105 inside the resonant cavity 103. The support member 105 transmits the vibration energy to the resonant block 106 in the center, causing the resonant block 106 to undergo forced resonance under the support of the support member 105. During resonance, the resonant block 106 converts the mechanical vibration energy into other forms of energy and dissipates it, thereby significantly attenuating the vibration intensity and achieving the second stage of vibration damping, effectively suppressing the continuous propagation of vibration within the structure.
Claims
1. An acoustic metamaterial vibration reduction and noise reduction structure, characterized in that, include: Substrate (1); The substrate (1) adopts a rectangular plate structure, and the substrate (1) has a through-hole mounting screw hole structure in a rectangular array. The substrate (1) is made of lightweight aluminum alloy material; A shock-absorbing and noise-reducing layer (101) is fixedly arranged on the upper part of the substrate (1), and the shock-absorbing and noise-reducing layer (101) adopts a rectangular plate structure. The shock-absorbing and noise-reducing layer (101) has a through-hole mounting screw hole structure in a rectangular array. The shock-absorbing and noise-reducing layer (101) is made of nitrile rubber material; A resonant cavity (103) is arranged in a rectangular array above the shock-absorbing and noise-reducing layer (101). The resonant cavity (103) adopts an internally controlled rectangular block structure, and a rectangular groove structure is opened in the middle of the bottom of the resonant cavity (103).
2. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 1, characterized in that: The vibration damping and noise reduction layer (101) has a rectangular array of fixed lower positioning blocks (102) with a rectangular block structure, and the size of the lower positioning blocks (102) matches the size of the rectangular groove at the bottom of the resonant cavity (103).
3. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 1, characterized in that: A set of resonance holes (104) are provided around the resonant cavity (103). The resonance holes (104) adopt a through circular groove structure, and the inner wall of the resonance holes (104) adopts a stepped structure. The diameter of the inner circular groove of the resonance hole (104) is smaller than the diameter of the outer circular groove.
4. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 1, characterized in that: The resonant cavity (103) is internally fixedly connected to a cross-shaped rod structure support member (105), and the support member (105) is made of elastic material.
5. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 4, characterized in that: A spherical resonant block (106) is fixedly disposed in the middle of the support member (105), and the resonant block (106) is made of metal material.
6. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 1, characterized in that: A rectangular block upper positioning block (107) is fixedly installed in the middle of the upper part of the resonant cavity (103).
7. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 1, characterized in that: A rectangular plate structure absorption layer (108) is connected above the resonant cavity (103), and a rectangular groove structure is formed in a rectangular array at the bottom of the absorption layer (108). The size of the rectangular groove at the bottom of the absorption layer (108) matches the size of the upper positioning block (107). A wave-shaped groove structure is formed above the absorption layer (108), and a through-type circular slot structure is formed on the inner side of the absorption layer (108) at equal intervals. A cylindrical absorption block (109) is fixedly set in the circular slot of the absorption layer (108), and a through-type honeycomb slot structure is formed inside the absorption block (109). The absorption block (109) is made of melamine sponge material.
8. The acoustic metamaterial vibration reduction and noise reduction structure as described in claim 7, characterized in that: A rectangular plate structure protective layer (110) is fixedly disposed above the absorbent layer (108), and the top of the protective layer (110) is provided with a hemispherical protrusion structure in a rectangular array. The protective layer (110) is made of lightweight aluminum alloy material.