Full-frequency vibration damping control device based on super-structured particle vibration damping and noise reduction

Abstract

This utility model relates to the field of engineering vibration reduction technology, specifically a full-frequency vibration damping control device based on metamaterial particle vibration reduction and noise reduction. It includes several symmetrically distributed dynamic vibration absorption modules, each consisting of a mass unit and elastic bodies covering the mass unit, forming a linear vibration absorption unit that absorbs low frequencies. The particle damping module is filled with discrete particles of different sizes. The dynamic vibration absorption module and the particle damping module are integrated and stacked within a main housing. This utility model overcomes the deficiency of insufficient low-frequency excitation in traditional particle dampers by using the dynamic vibration absorption module to target and absorb vibration energy in the target low-frequency range through the anti-resonance principle of the mass-elastic body. In the high-frequency range, the particle damping module takes the lead. The integrated and collaborative operation of the dynamic vibration absorption module and the particle damping module achieves a seamless full-frequency vibration suppression effect from low to high frequencies.

Description

Technical Field

[0001] This utility model relates to the field of engineering vibration reduction technology, specifically a full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction. Background Technology

[0002] Particle dampers are a nonlinear passive vibration reduction technology based on the principle of energy dissipation through particle collision and friction. In recent years, they have received widespread attention in vibration control in fields such as aerospace, vehicle engineering, and building structures. Their core mechanism involves filling a sealed cavity with discrete particles such as metals, ceramics, or composite materials, allowing them to interact with the vibrating structure and convert mechanical kinetic energy into internal and acoustic energy, thereby achieving vibration reduction.

[0003] Although commercially available particle dampers have advantages such as wide bandwidth and good environmental adaptability, traditional particle dampers also have significant inherent technical bottlenecks: First, in the low-frequency region (usually below 200Hz), due to the low vibration excitation energy, it is difficult to fully drive the particle group to produce violent motion, resulting in insufficient collision momentum between particles and between particles and the cavity wall, and a significant reduction in effective friction contact time (studies show it can be as low as 30%-50%), leading to low energy conversion efficiency and severely insufficient low-frequency energy dissipation capacity.

[0004] Secondly, this shortcoming directly leads to its minimal or even ineffective suppression of low-frequency resonance peaks. When the external excitation frequency couples with the structure's natural frequency, it cannot effectively suppress the amplitude amplification effect caused by resonance, posing a safety hazard. Furthermore, the performance of particle dampers is heavily dependent on parameters such as particle size, material, and filler density, resulting in an inherent contradiction in broadband adaptability: adjusting parameters (such as increasing particle density) may optimize high-frequency performance, but it often further sacrifices the already insufficient low-frequency energy dissipation capacity, pushing its bandwidth extension to physical limits.

[0005] Therefore, developing a novel damping device that can effectively compensate for low-frequency shortcomings while also taking into account wide-frequency and efficient vibration suppression capabilities has become a technical challenge that urgently needs to be solved in this field. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a full-frequency vibration damping control device based on meta-particle vibration reduction and noise reduction. By creatively integrating and coupling the distributed dynamic vibration absorption module and the particle damping module in an ultra-thin space, the mechanism of linear resonance vibration absorption and nonlinear collision friction energy dissipation is integrated, thereby achieving a synergistic effect and excellent vibration control covering the entire frequency band.

[0007] To achieve the above objectives, this utility model provides a full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction, including a number of symmetrically distributed dynamic vibration absorption modules, which are disposed inside both ends of the longitudinal axis of the main shell. The dynamic vibration absorption module consists of a mass unit and an elastic body covering the upper and lower parts of the mass unit, forming a linear vibration absorption unit that absorbs low frequencies of 100-200Hz.

[0008] The particle damping module is located in the middle of the main shell and is filled with discrete particles with a particle size of 0.5-3mm.

[0009] The dynamic vibration absorption module and the particle damping module are stacked and integrated inside the main shell, with a total thickness of 11mm±5mm. The dynamic vibration absorption module targets and absorbs low-frequency vibration energy, while the particle damping module dissipates high-frequency vibration energy through particle collision and friction. The two work together to achieve full-frequency vibration control.

[0010] As a further improvement to this technical solution, the elastomer is made of polyurethane foam material with a dynamic loss factor ≥0.35, and the elastic modulus fluctuation rate is <8% under the working conditions of 40℃-180℃; frequency control is achieved by adjusting the weight of the mass unit and the stiffness of the elastomer, and the designed vibration absorption frequency is between 100-200Hz.

[0011] As a further improvement to this technical solution, the material of the discrete particles is at least one of stainless steel, ceramic and composite materials.

[0012] As a further improvement to this technical solution, the main housing is made of aluminum alloy and has a pair of high-frequency vibration-absorbing cavities in the middle and low-frequency vibration-absorbing cavities at both ends of its longitudinal direction. The inner wall of the high-frequency vibration-absorbing cavity is coated with a friction-strengthening coating.

[0013] As a further improvement to this technical solution, the dynamic vibration absorption module also includes a cover and a fixing pin for clamping the mass unit and the two elastic bodies.

[0014] As a further improvement to this technical solution, a sleeve post is vertically provided at the center of the circular surface of the cover. The sleeve post passes through the central hole of the mass unit and the two elastic bodies and is tightly fitted with the fixing pin.

[0015] As a further improvement to this technical solution, in the low-frequency range, the vibration attenuation of the dominant control frequency of the dynamic vibration absorption module is greater than 25dB.

[0016] As a further improvement to this technical solution, in the high-frequency band, the vibration attenuation of the dominant control frequency by the particle damping module is greater than 10dB.

[0017] As a further improvement to this technical solution, at least two symmetrically distributed fixed wings extend outward from the corner of the main housing, with mounting holes at the wing ends, and are rigidly connected to the application scenario through the fixed wings.

[0018] As a further improvement to this technical solution, the longitudinal surface of the main housing is open and fixedly connected with a cover plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction overcomes the shortcomings of traditional particle dampers in low-frequency excitation by using a dynamic vibration absorption module to target and absorb vibration energy in the target low-frequency range of 100-200Hz through the anti-resonance principle of mass-elasticity. In the high-frequency range above 500Hz, the particle damping module takes the lead, and energy is fully dissipated through inelastic collisions and friction between particles and the cavity walls of the coated friction layer. The integrated and coordinated operation of the dynamic vibration absorption module and the particle damping module achieves a seamless full-frequency vibration suppression effect from low frequency to high frequency.

[0021] 2. This full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction uses polyurethane foam material with a dynamic loss factor ≥0.35 and stable performance over a wide temperature range as the elastomer, and precisely tunes the parameters of the mass unit and the elastomer to achieve precise control and stable maintenance of the resonance frequency of the dynamic vibration absorption module. This achieves the technical effect of efficiently and reliably suppressing specific low-frequency resonance peaks even under harsh working conditions.

[0022] 3. This full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction achieves the technical effect of significantly improving the energy dissipation rate of mid-to-high frequency vibration by coating the inner wall of the cavity in the middle of the main shell with a friction-enhancing coating and optimizing the filling with metal and ceramic particles of different sizes, thereby enhancing the energy dissipation efficiency of collision friction. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, will select various possible shapes and proportions to implement this invention according to specific circumstances.

[0024] Figure 1 This is a partial exploded view of the present invention.

[0025] Figure 2 This is a schematic diagram of the assembly structure of the dynamic vibration absorption module of this utility model;

[0026] Figure 3 This is an exploded view of the dynamic vibration absorption module of this utility model;

[0027] Figure 4 This is a schematic diagram of the internal assembly structure of the main shell of this utility model;

[0028] Figure 5 This utility model Figure 4 A bottom view;

[0029] Figure 6 This is a schematic diagram of the main shell structure of this utility model;

[0030] Figure 7 Vibration attenuation diagrams of the full-frequency damping device of this utility model and commercially available particle dampers;

[0031] Figure 8 This is a comparison chart of the attenuation of the full-frequency damping device of this utility model in the 100-200Hz range;

[0032] Figure 9 This is a schematic diagram of the damping test experiment of this utility model;

[0033] Figure 10 This is a comparison chart of the damping test results of this utility model;

[0034] The meanings of the labels in the diagram are as follows:

[0035] 100. Dynamic vibration absorption module; 110. Mass unit; 120. Elastomer; 130. Support cover; 131. Sleeve column; 140. Fixing pin; 200. Particle damping module;

[0036] 300, Main housing; 310, High-frequency vibration absorption cavity; 320, Low-frequency vibration absorption cavity; 330, Threaded hole; 400, Cover plate. Detailed Implementation

[0037] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are for illustrative purposes only and should not be construed as limiting the utility model in any way. Under the teachings of this utility model, any possible modifications based on this utility model should be considered within the scope of this utility model. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection as well as indirect connection through an intermediate medium.

[0038] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, in the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0039] Please see Figures 1-6 As shown, this utility model provides a full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction, including several symmetrically distributed dynamic vibration absorption modules 100, which are disposed inside both ends of the longitudinal axis of the main shell 300. The dynamic vibration absorption module 100 consists of a mass unit 110 and an elastic body 120 covering the upper and lower parts of the mass unit 110, forming a linear vibration absorption unit that absorbs low frequencies of 100-200Hz. The elastic body 120 is made of polyurethane foam material with a dynamic loss factor ≥0.35, and the elastic modulus fluctuation rate is <8% under the working conditions of 40℃-180℃, ensuring the stability of the structure's vibration absorption performance. Frequency control is achieved by adjusting the weight of the mass unit 110 and the stiffness of the elastic body 120, and the designed vibration absorption frequency is between 100-200Hz to achieve a low-frequency vibration absorption effect.

[0040] It includes a particle damping module 200, which is located in the middle of the main housing 300 and is filled with discrete particles with a particle size of 0.5-3mm. The discrete particles are made of at least one of stainless steel, ceramic and composite materials. The kinetic energy is converted into thermal energy through inelastic collisions between particles, thus ensuring collision energy absorption and loss.

[0041] The dynamic vibration absorption module 100 and the particle damping module 200 are stacked and integrated inside the main housing 300, with a total thickness of 11mm±5mm, which is suitable for narrow spaces such as floor mezzanine. The dynamic vibration absorption module 100 targets and absorbs low-frequency vibration energy, while the particle damping module 200 dissipates high-frequency vibration energy through particle collision and friction. The two work together to achieve full-frequency vibration control.

[0042] Furthermore, the main housing 300 is made of aluminum alloy, and a pair of high-frequency vibration-absorbing cavities 310 are provided in the middle of its interior for placing several particle damping modules 200; low-frequency vibration-absorbing cavities 320 are provided at both ends of its interior longitudinal direction for placing several dynamic vibration-absorbing modules 100; the inner wall of the high-frequency vibration-absorbing cavity 310 is coated with a friction-enhancing coating to enhance the energy dissipation effect generated by the collision between the particles and the housing.

[0043] Furthermore, in order to modularly fix the dynamic vibration absorption module 100 for installation and storage, the dynamic vibration absorption module 100 also includes a cover 130 and a fixing pin 140 for clamping the mass unit 110 and the two elastic bodies 120; a sleeve 131 is vertically provided at the center of the circular surface of the cover 130, the sleeve 131 passes through the central hole of the mass unit 110 and the two elastic bodies 120, and is tightly fitted with the fixing pin 140.

[0044] In addition, at least two symmetrically distributed fixed wings radiate outward from the corners of the main housing 300, with mounting holes at the wing ends. The fixed wings are rigidly connected to the application environment, such as floor mezzanines or other engineering structures prone to vibration. The longitudinal surface of the main housing 300 is open and fixedly connected to a cover plate 400, which is also made of aluminum alloy. The bottom surface of the high-frequency vibration absorption cavity 310 and the low-frequency vibration absorption cavity 320 of the main housing 300 has several threaded holes 330. The cover plate 400 is fixedly connected to the several threaded holes 330 by screws, thereby sealing several particle damping modules 200 and several dynamic vibration absorption modules 100 inside the cavity of the main housing 300.

[0045] Experimental verification:

[0046] like Figure 7 and Figure 8 As shown in the comparison between the full-frequency damper and existing particle damper products on the market, the vibration attenuation of the full-frequency damper in the low-frequency range of 100-200Hz is significantly better than that of existing products. (Since colored graphs cannot be attached, which may affect the observation and comparison, the applicant hereby promises that the experimental results are true and reliable, and is willing to provide the original graphs if necessary.)

[0047] like Figure 9 and Figure 10 As shown, a frequency response test was conducted using a 500mm×500mm×2mm steel plate as the substrate. The vibration attenuation of the full-frequency superstructure particle damper of this invention reached 27dB at the critical frequency compared to the steel plate alone.

[0048] This invention relates to a full-frequency vibration damping control device based on metamaterial particle vibration reduction and noise reduction. When installed in application scenarios, such as floor interlayers and other engineering structures prone to vibration, the device utilizes the synergistic effect of particle collisions and friction (nonlinear energy dissipation) of several particles of different sizes in the particle damping module 200 and vibration absorption tuning (linear resonance) of several dynamic vibration absorption modules 100 to form a dual composite vibration absorption path. In the low-frequency range, the vibration attenuation at the dominant control frequency of the dynamic vibration absorption module 100 is greater than 25dB; in the high-frequency range, the vibration attenuation at the dominant control frequency of the particle damping module 200 is greater than 10dB. Thus, through the parallel tuning of the distributed dynamic vibration absorption modules 100 and the nonlinear enhanced vibration absorption effect of the particle damping modules 200, the effective vibration absorption bandwidth is extended to the full frequency band, covering the target vibration reduction frequency band.

[0049] It should be noted that the fixed connection and fixing method of this utility model are achieved by conventional fixing means such as bolt connection or welding. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction, characterized in that, It includes several symmetrically distributed dynamic vibration absorption modules (100) disposed inside both ends of the longitudinal axis of the main housing (300). The dynamic vibration absorption module (100) consists of a mass unit (110) and an elastic body (120) covering the upper and lower parts of the mass unit (110), forming a linear vibration absorption unit that absorbs low frequencies of 100-200Hz. The particle damping module (200) is located in the middle of the main shell (300) and is filled with discrete particles with a particle size of 0.5-3mm. The dynamic vibration absorption module (100) and the particle damping module (200) are stacked and integrated inside the main shell (300), with a total thickness of 11mm±5mm. The dynamic vibration absorption module (100) targets and absorbs low-frequency vibration energy, while the particle damping module (200) dissipates high-frequency vibration energy through particle collision and friction. The two work together to achieve full-frequency vibration control.

2. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 1, characterized in that: The elastomer (120) is made of polyurethane foam material with a dynamic loss factor ≥0.35 and an elastic modulus fluctuation rate <8% under working conditions of 40℃-180℃; frequency control is achieved by adjusting the weight of the mass unit (110) and the stiffness of the elastomer (120), and the designed vibration absorption frequency is between 100-200Hz.

3. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 2, characterized in that: The discrete particles are made of at least one of stainless steel, ceramic, and composite materials.

4. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 3, characterized in that: The main housing (300) is made of aluminum alloy and has a pair of high-frequency vibration absorption cavities (310) in the middle of its interior. Low-frequency vibration absorption cavities (320) are provided at both ends of its interior longitudinal direction. The inner wall of the high-frequency vibration absorption cavity (310) is coated with a friction-strengthening coating.

5. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 4, characterized in that: The dynamic vibration absorption module (100) also includes a cover (130) and a fixing pin (140) for clamping the mass unit (110) and two elastomers (120).

6. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 5, characterized in that: The cover (130) has a sleeve (131) vertically positioned at the center of its circular surface. The sleeve (131) passes through the central holes of the mass unit (110) and the two elastic bodies (120) and is tightly fitted with a fixing pin (140).

7. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 6, characterized in that: At low frequencies, the vibration attenuation of the dominant control frequency of the dynamic vibration absorption module (100) is greater than 25dB.

8. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 7, characterized in that: At high frequencies, the particle damping module (200) controls the vibration attenuation of the dominant frequency by more than 10 dB.

9. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 8, characterized in that: At least two symmetrically distributed fixed wings extend outward from the corner of the main housing (300), with mounting holes at the wing ends, and are rigidly connected to the application scenario through the fixed wings.

10. The full-frequency vibration damping control device based on metaparticle vibration reduction and noise reduction according to claim 9, characterized in that: The main housing (300) has an opening on its longitudinal surface and is fixedly connected to a cover plate (400).

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