Broadband three-way micro-vibration prevention base station based on multiple energy consumption mechanisms

Abstract

The invention relates to the field of anti-micro-vibration base stations, and discloses a broadband three-way anti-micro-vibration base station based on multiple energy dissipation mechanisms, which comprises a lightweight aggregate concrete base, a plurality of three-way spherical periodic structures are uniformly arranged in the lightweight aggregate concrete base, a plurality of three-way particle dampers are uniformly arranged in the lightweight aggregate concrete base, and the three-way particle dampers are arranged in the lightweight aggregate concrete base. The three-way spherical periodic structure comprises a metal shell, polyurethane rubber balls are arranged on the inner wall of the metal shell, and steel mass balls are arranged in the polyurethane rubber balls. The lightweight aggregate concrete base is adopted, and the surface modified rubber particles and the ceramsite subjected to staged pre-wetting treatment are doped as lightweight aggregate, so that the self weight of the base is remarkably reduced while the structure of an aggregate and mortar interface transition area is optimized, the bearing load of a building structure is reduced, and the construction efficiency is improved. And the overall vibration absorption capacity is improved through the high damping characteristic of the rubber particles, and the problem that the installation adaptability is poor due to the fact that the mass of a traditional abutment is too large is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-vibration bases, and specifically to a broadband three-direction anti-vibration base based on multiple energy dissipation mechanisms. Background Art

[0002] With the popularization of 5G communication technology and the continuous upgrading of AI chip manufacturing processes, the demand for high-precision manufacturing environments in newly built domestic wafer fabs has increased significantly. As the core support for key processes such as semiconductor lithography and etching, the performance of anti-vibration bases directly affects the accuracy and yield of chip manufacturing processes, and the market demand has shown explosive growth. At the same time, the high-density deployment of data center server clusters, the strict requirements of quantum computing devices for the stability of quantum states, and the sensitivity of precision detection instruments in the biomedical field to micro-environment vibration control have all promoted the iterative development of anti-vibration base technology towards high efficiency, broadband, and lightweight. The above fields not only require the base to cover a wide range of vibration control from low frequency to high frequency, but also need to reduce the self-weight through material innovation and structural optimization to adapt to diverse building load-bearing conditions and precision equipment installation requirements, forming a new generation of anti-vibration solutions with both vibration reduction efficiency and environmental adaptability.

[0003] Traditional reinforced concrete or steel-concrete vibration control bases rely on the inertial effect of large mass to achieve vibration isolation. Their own weights are generally large, which not only increases the load-bearing of building structures and foundations, but also has the defect of insufficient low-frequency vibration control ability, and it is difficult to meet the requirements of precision equipment for broadband micro-vibration suppression. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a broadband three-direction anti-vibration base based on multiple energy dissipation mechanisms, which solves the problems that traditional reinforced concrete or steel-concrete vibration control bases only rely on large mass for vibration isolation, have a large base weight, and have poor vibration reduction effect on low-frequency vibrations.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] A broadband three-direction anti-vibration base based on multiple energy dissipation mechanisms includes a lightweight aggregate concrete base. A plurality of three-direction spherical periodic structures are uniformly arranged inside the lightweight aggregate concrete base. A plurality of three-direction particle dampers are uniformly arranged inside the lightweight aggregate concrete base. The three-direction spherical periodic structure includes a metal shell, a polyurethane rubber ball is arranged on the inner wall of the metal shell, and a steel mass ball is arranged inside the polyurethane rubber ball. The three-direction particle damper includes a three-direction particle damper shell, and steel spherical particles are arranged inside the three-direction particle damper shell. An inclined support structure is arranged on the outer wall of the lightweight aggregate concrete base.

[0007] Preferably, the diagonal bracing structure includes side braces, the outer wall of the side braces is fixedly connected to the outer wall of the lightweight aggregate concrete base, a first fixing seat is fixedly connected to the outer wall of the side braces, a first fixing column is fixedly connected to the outer wall of the first fixing seat, a first support rod is rotatably connected to the outer wall of the first fixing column, a rotating column is rotatably connected to the inside of the first support rod, a sliding block is fixedly connected to the outer wall of the rotating column, a support frame is slidably connected to the outer wall of the sliding block, and a small abutting block is fixedly connected to the outer wall of the support frame.

[0008] Preferably, the diagonal bracing structure further includes a first damper, one end of the first damper is fixedly connected to the outer wall of the side brace, a large abutting block is fixedly connected to the other end of the side brace, a buffer spring is slidably connected to the outer wall of the first damper, one end of the buffer spring is fixedly connected to the outer wall of the side brace, and the other end of the buffer spring is fixedly connected to the outer wall of the large abutting block.

[0009] Preferably, the diagonal bracing structure further includes a second fixing seat, the outer wall of the second fixing seat is fixedly connected to the outer wall of the large abutting block, a second rotating rod is fixedly connected to the inside of the second fixing seat, a second support rod is rotatably connected to the outer wall of the second rotating rod, and the inside of the second support rod is rotatably connected to the outer wall of the rotating column.

[0010] Preferably, the diagonal bracing structure further includes a second damper, one end of the second damper is fixedly connected to the inner wall of the support frame, and the other end of the second damper is fixedly connected to the outer wall of the sliding block.

[0011] Preferably, the preparation method of the lightweight aggregate concrete base includes the following steps:

[0012] S1. Perform surface modification treatment on rubber particles and perform staged pre-wetting treatment on ceramsite.

[0013] S2. Put the pretreated ceramsite and fine aggregate into a forced mixer for dry mixing, and then add cementitious materials and powdered admixtures and continue dry mixing.

[0014] S3. Add part of the mixing water, water reducer and thickener and stir to form a mortar matrix, and then add modified rubber particles.

[0015] S4. Add steel fibers through a vibrating feeding device and perform dispersion stirring.

[0016] S5. Supplement the mixing water and continue stirring until homogenized, and then pour and mold.

[0017] Preferably, in the step S1, the rubber particles are treated in an alkaline solution environment at 25°C - 40°C for 30 - 60 minutes, the concentration of the alkaline solution is 5% - 10%, and the ceramsite is pre-wetted by adding water in two stages with a roller at 5 - 10 r / min. In the first stage, water is added until the saturated water absorption rate reaches 20% - 30%, and then it is left standing for 10 - 15 minutes. In the second stage, water is added until the saturated water absorption rate reaches 50% - 70%.

[0018] Preferably, in the step S2, a double-horizontal-shaft forced mixer is used. In the first stage, dry mixing is carried out at 400 - 600 r / min for 15 - 30 seconds, and in the second stage, dry mixing is carried out at 800 - 1000 r / min for 30 - 45 seconds.

[0019] Preferably, in the step S3, 70% - 85% of the total designed water volume is added, and stirring is carried out at a rotation speed of 800 - 1200 r / min. The thickening agent is a viscosity modifier, and the addition amount is 0.1% - 0.5% of the mass of the gelling material.

[0020] Preferably, in the step S4, the amplitude of the vibrating feeding device is 2 - 5 mm and the frequency is 20 - 50 Hz, and the fiber dispersion rotation speed is 1000 - 1500 r / min.

[0021] The present invention provides a broadband three-way anti-microvibration pedestal based on multiple energy dissipation mechanisms, having the following beneficial effects:

[0022] 1. By adopting a lightweight aggregate concrete pedestal and incorporating surface-modified rubber particles and ceramsite treated by staged pre-wetting as lightweight aggregates, the present invention not only optimizes the structure of the interfacial transition zone between the aggregates and the mortar but also significantly reduces the self-weight of the pedestal. This not only reduces the bearing load on the building structure but also utilizes the high damping characteristics of the rubber particles to enhance the overall vibration absorption capacity, solving the problem of poor installation adaptability caused by the excessive mass of the traditional pedestal.

[0023] 2. The present invention uniformly arranges a three-way spherical periodic structure and a three-way particle damper inside the lightweight aggregate concrete pedestal. The three-way spherical periodic structure forms a periodic vibration isolation mechanism through the restraint of the metal shell, the elastic buffering of the polyurethane rubber balls, and the inertial action of the internal steel mass balls. The three-way particle damper dissipates energy through the collision and friction between the steel spherical particles inside the shell. The two work together to achieve the efficient absorption of multi-directional vibration energy in a wide frequency range.

[0024] 3. The present invention adds a composite diagonal bracing structure to the outer wall of the pedestal. Through the linkage of the side bracing frame, the multi-directional rotating joints, the sliding blocks, and the support frame mechanism, the lateral vibration energy is conducted to the buffer spring for elastic buffering, and the viscous damping effects of damper one and damper two are used to dissipate energy synchronously. At the same time, the lateral stiffness is dynamically adjusted through sliding cooperation, significantly improving the microvibration control performance of the pedestal in the horizontal direction.

[0025] 4. Through the combination of multi-graded steel spherical particles in the three-way particle damper, the present invention utilizes the non-linear energy dissipation characteristics of small particles responding to high-frequency vibrations and large particles suppressing low-frequency resonances, and combines the collision, friction, and shear effects between particles to form a broadband energy dissipation system. At the same time, its three-dimensional design adaptively couples the multi-directional movement of the particle fluid with the multi-dimensional vibration modes of the structure to effectively suppress complex vibrations in the full frequency domain, especially suitable for random multi-directional excitation scenarios such as earthquakes or wind vibrations.

[0026] 5. By virtue of the Bragg scattering effect of the three-way spherical periodic structure, the present invention forms a specific frequency band elastic wave bandgap under the constraint of the metal shell to block the vibration propagation path. Combining the viscoelastic shear deformation of the polyurethane rubber ball and the inertial impact of the internal steel mass ball to stimulate a multi-layer energy dissipation mechanism, the energy dissipation density is significantly improved through the rigid-flexible-inertial coupling effect. At the same time, the spatial periodic arrangement of the spherical units optimizes the overall equivalent impedance of the base, enabling the vibration energy to be efficiently introduced into the damping unit to achieve broadband targeted attenuation.

[0027] 6. The present invention uniformly inputs steel fibers through a vibrating feeding device with an amplitude of 2 - 5 mm and a frequency of 20 - 50 Hz, and cooperates with a dispersion speed of 1000 - 1500 r / min. Using the vibration energy to overcome the electrostatic adsorption of the fibers, the single-filament disentanglement of the fibers is achieved under the action of centrifugal force and shear force, ensuring their three-dimensional random and uniform distribution in the mortar matrix, avoiding the formation of stress concentration points due to agglomeration, constructing a continuous mechanical conduction network, providing a multi-directional strengthening effect for the lightweight aggregate concrete base, and optimizing the overall vibration resistance performance of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional schematic diagram of the internal structure of the lightweight aggregate concrete base of the present invention;

[0029] Figure 2 is a partial structural schematic diagram of the metal shell of the present invention;

[0030] Figure 3 is a cross-sectional schematic diagram of the internal structure of the polyurethane rubber ball of the present invention;

[0031] Figure 4 is a partial structural schematic diagram of the outer shell of the three-way particle damper of the present invention;

[0032] Figure 5 is a partial structural schematic diagram of the steel spherical particles of the present invention;

[0033] Figure 6 is a partial structural schematic diagram of the side support of the present invention;

[0034] Figure 7 is a partial structural schematic diagram of the large block of the present invention;

[0035] Figure 8Schematic diagram of a partial structure of the damper of the present invention;

[0036] Figure 9 Flow chart of the preparation method of the lightweight aggregate concrete base of the present invention.

[0037] Among them, 1. Lightweight aggregate concrete base; 2. Metal shell; 3. Polyurethane rubber ball; 4. Steel mass ball; 5. Triaxial particle damper shell; 6. Steel spherical particles; 7. Side brace; 8. Fixed seat 1; 9. Fixed column 1; 10. Damper 1; 11. Buffer spring; 12. Support rod 1; 13. Sliding block; 14. Support frame; 15. Damper 2; 16. Small abutting block; 17. Large abutting block; 18. Rotating rod 2; 19. Fixed seat 2; 20. Support rod 2; 21. Rotating column. Specific embodiments

[0038] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to the attached Figure 1 - attached Figure 9 , the embodiment of the present invention provides a broadband three-way anti-microvibration base based on multiple energy dissipation mechanisms, including a lightweight aggregate concrete base 1, a plurality of triaxial spherical periodic structures are uniformly arranged inside the lightweight aggregate concrete base 1, a plurality of triaxial particle dampers are uniformly arranged inside the lightweight aggregate concrete base 1, the triaxial spherical periodic structure includes a metal shell 2, a polyurethane rubber ball 3 is arranged on the inner wall of the metal shell 2, a steel mass ball 4 is arranged inside the polyurethane rubber ball 3, the triaxial particle damper includes a triaxial particle damper shell 5, and steel spherical particles 6 are arranged inside the triaxial particle damper shell 5, and a diagonal bracing structure is arranged on the outer wall of the lightweight aggregate concrete base 1.

[0040] Specifically, taking the lightweight aggregate concrete base 1 as the main body, multiple groups of three-dimensional spherical periodic structures and three-dimensional particle dampers are uniformly arranged inside it. The three-dimensional spherical periodic structure consists of a metal shell 2, an inner wall polyurethane rubber ball 3, and an internal steel mass ball 4. A periodic vibration isolation mechanism is formed through the restraint of the metal shell 2, the buffering of the inner wall polyurethane rubber ball 3, and the inertial action of the steel mass ball 4. The three-dimensional particle damper has a structure with steel spherical particles 6 inside, and the vibration energy is dissipated by the collision and friction between the steel spherical particles 6. An inclined support structure is set on the outer wall of the lightweight aggregate concrete base 1, and the viscous damping action of the damper one 10 and the damper two 15 is used to consume the lateral vibration energy. At the same time, the sliding fit between the sliding block 13 and the support frame 14 is used to adjust the lateral stiffness of the structure, which can efficiently absorb the lateral vibration and improve the micro-vibration control performance of the lightweight aggregate concrete base 1 in the horizontal direction.

[0041] Among them, the vibration suppression mechanism of the three-dimensional particle damper includes:

[0042] Broadband high-efficiency vibration reduction:

[0043] Multi-graded particles (different particle size combinations) form a non-linear energy dissipation system. Through the collision, friction, and shear actions between particles, the broadband vibration energy dissipation is covered. Small particles respond to high-frequency vibrations, and large particles suppress low-frequency resonances, realizing the vibration suppression in the full frequency domain and avoiding the frequency limitation of traditional single-graded dampers.

[0044] Three-dimensional vibration coupling control:

[0045] The three-dimensional design (X / Y / Z axis linkage) adapts to the multi-dimensional vibration modes (such as torsional and translational combined vibrations) of the structure through the multi-directional movement characteristics of the particle fluid, effectively suppressing the complex vibration transmission path, and is especially suitable for random multi-directional excitation scenarios such as earthquakes and wind vibrations.

[0046] Non-linear adaptive energy dissipation:

[0047] The particle group forms a "solid-fluid" phase change effect under vibration excitation, dynamically adjusting the damping characteristics: when the vibration amplitude is low, the particle friction energy dissipation is the main, and under high-energy impacts, the particle collision dominates, forming an adaptive energy dissipation mechanism positively correlated with the excitation intensity, significantly improving the protection ability under extreme loads.

[0048] Vibration-acoustic collaborative control:

[0049] The inelastic collision and friction between particles not only dissipate mechanical vibration energy, but also reduce the noise radiation efficiency through the conversion of sound energy (the high-frequency collision sound waves are reflected and attenuated multiple times in the particle pile), realizing the synchronous suppression of vibration and structural noise (the noise reduction amount can reach 10 - 15 dB).

[0050] Durability and environmental robustness:

[0051] Concrete encapsulation protects the particle damping unit to avoid external corrosion; it does not have the seal aging problem of traditional viscous dampers, and the particle material (such as metal / ceramic) has stable performance under long-term loads and zero maintenance costs, making it suitable for harsh environments such as nuclear power plants and undersea tunnels.

[0052] Space efficiency and structural integration:

[0053] The built-in design integrates the damping unit into the concrete base load-bearing structure to avoid interference of external dampers on building functions; the high energy density characteristics of the particles (energy consumption per unit volume is 3-5 times that of traditional dampers) achieve super vibration reduction capabilities in a compact space.

[0054] Among them, the vibration suppression mechanism of the three-dimensional spherical periodic structure includes

[0055] Bandgap filtering and frequency domain targeted suppression:

[0056] The Bragg scattering effect formed by the periodic structure generates elastic wave band gaps in specific frequency bands (such as high-frequency vibration main frequency), directly blocking the propagation path of the vibration wave;

[0057] The steel mass ball 4 controls the band gap range by inertia and combines the viscoelastic dispersion characteristics of the polyurethane interlayer to accurately cover the high-speed rail wheel-rail noise (50-2000Hz) and structural resonance frequency bands, achieving spectrum adaptive attenuation (attenuation efficiency increased by 30%-50%).

[0058] Multi-level energy consumption coordination:

[0059] Metal shell 2: reflects high-frequency vibration energy through sudden change in stiffness;

[0060] Polyurethane rubber ball 3: viscoelastic shear deformation dissipation of medium and high frequency vibration (low temperature frequency sensitivity, stable performance at -40℃~80℃);

[0061] Steel mass ball 4: Inertial impact excites particle damping effect (collision and friction with the outer shell) to enhance low-frequency vibration absorption.

[0062] The rigid-flexible-inertial coupling of the three forms a wide-band energy dissipation chain, and the energy dissipation density is increased by 2-3 times compared with a single damping structure.

[0063] Three-way impedance matching optimization:

[0064] The spherical periodic unit presents symmetrical dynamic characteristics in the X / Y / Z axes. The overall equivalent impedance of the base is adjusted through spatial periodic arrangement, the reflection distortion of the vibration wave at the concrete-damping interface is reduced, and the vibration energy is more efficiently introduced into the damping unit.

[0065] Acoustic metamaterial properties:

[0066] The metal shell 2 and the polyurethane sandwich layer form a locally resonant metamaterial. The mass of the steel ball 4 and the stiffness of the polyurethane are coupled to regulate the local resonance frequency, resulting in a wave vector mismatch for specific wavelength noises (such as wheel-rail rolling noises in the range of 500 - 1500 Hz), and reducing the structural sound radiation efficiency (the noise reduction amount is additionally increased by 5 - 8 dB).

[0067] Durability and maintainability:

[0068] The metal shell 2 provides sealed protection to prevent the aging of the polyurethane (the service life is extended by more than 3 times compared with the exposed damping material).

[0069] There are no mechanical sliding parts at the steel ball - polyurethane interface, and it has excellent anti-fatigue performance.

[0070] The modular periodic unit supports local replacement, reducing the maintenance cost.

[0071] The diagonal bracing structure includes a side brace 7. The outer wall of the side brace 7 is fixedly connected to the outer wall of the lightweight aggregate concrete base 1. A first fixing seat 8 is fixedly connected to the outer wall of the side brace 7. A first fixing column 9 is fixedly connected to the outer wall of the first fixing seat 8. A first support rod 12 is rotatably connected to the outer wall of the first fixing column 9. A rotating column 21 is rotatably connected to the inside of the first support rod 12. A sliding block 13 is fixedly connected to the outer wall of the rotating column 21. The sliding block 13 is slidably connected to a support frame 14. A small abutting block 16 is fixedly connected to the outer wall of the support frame 14. The diagonal bracing structure further includes a first damper 10. One end of the first damper 10 is fixedly connected to the outer wall of the side brace 7. A large abutting block 17 is fixedly connected to the other end of the side brace 7. A buffer spring 11 is slidably connected to the outer wall of the first damper 10. One end of the buffer spring 11 is fixedly connected to the outer wall of the side brace 7. The other end of the buffer spring 11 is fixedly connected to the outer wall of the large abutting block 17. The diagonal bracing structure further includes a second fixing seat 19. The second fixing seat 19 is fixedly connected to the outer wall of the large abutting block 17. A second rotating rod 18 is fixedly connected to the inside of the second fixing seat 19. A second support rod 20 is rotatably connected to the outer wall of the second rotating rod 18. The second support rod 20 is rotatably connected to the outer wall of the rotating column 21. The diagonal bracing structure further includes a second damper 15. One end of the second damper 15 is fixedly connected to the inner wall of the support frame 14. The other end of the second damper 15 is fixedly connected to the outer wall of the sliding block 13.

[0072] Specifically, the side support 7 is fixed to the outer wall of the lightweight aggregate concrete base 1. The sliding block 13 can slide within the support frame 14. The support frame 14 contacts the ground through the small abutting block 16 to form a lateral support node. One end of the first damper 10 is connected to the side support 7, and the other end is fixed through the large abutting block 17. Both ends of the buffer spring 11 on its outer wall are respectively connected to the side support 7 and the large abutting block 17. When the base is subjected to lateral vibration, the buffer spring 11 absorbs the vibration energy through elastic deformation, and the first damper 10 synchronously provides viscous damping to dissipate energy. The fixed seat two 19 on the outer wall of the large abutting block 17 is rotatably connected to the support rod two 20 through the rotating rod two 18. The other end of the support rod two 20 is rotatably connected to the rotating column 21 to form a lateral vibration conduction sliding node, transferring the lateral vibration energy to the rotating nodes of the support rod one 12 and the support rod two 20 and the sliding interface of the sliding block 13. Both ends of the second damper 15 are respectively connected to the inner wall of the support frame 14 and the sliding block 13. When the sliding block 13 generates displacement due to lateral vibration, the sliding speed is inhibited through the damping force to further dissipate the lateral vibration energy. The lateral support frame is constructed by fixedly connecting the side support 7 to the lightweight aggregate concrete base 1. The rotating nodes of the support rod one 12, the rotating column 21, and the support rod two 20 achieve multi-path conduction of lateral vibration. The elastic buffer of the buffer spring 11 reduces the lateral vibration amplitude. The viscous damping effects of the first damper 10 and the second damper 15 consume the lateral vibration energy. The sliding fit between the sliding block 13 and the support frame 14 adjusts the lateral stiffness of the structure, enabling efficient absorption of lateral vibration and improving the micro-vibration control performance of the lightweight aggregate concrete base 1 in the horizontal direction.

[0073] The preparation method of the lightweight aggregate concrete base 1 includes the following steps:

[0074] S1. Perform surface modification treatment on the rubber particles and perform staged pre-wetting treatment on the ceramsite.

[0075] S2. Put the pretreated ceramsite and fine aggregate into a compulsory mixer for dry mixing, and then add the cementitious material and powder admixture and continue dry mixing.

[0076] S3. Add part of the mixing water, water reducer and thickener and stir to form a mortar matrix, and then add the modified rubber particles.

[0077] S4. Add steel fibers through a vibrating feeding device and perform dispersion stirring.

[0078] S5. Supplement the mixing water and continue stirring until homogenized, and then pour and mold.

[0079] In step S1, the rubber particles are treated in an alkaline solution environment at 25°C - 40°C for 30 - 60 minutes, the concentration of the alkaline solution is 5% - 10%, the ceramsite pre-wetting uses a 5 - 10 r / min roller to add water in two stages. In the first stage, it is added to 20% - 30% of the saturated water absorption rate and then left standing for 10 - 15 minutes. In the second stage, water is added to 50% - 70% of the saturated water absorption rate.

[0080] Specifically, the rubber particles are treated in an alkaline solution environment at 25°C - 40°C and a concentration of 5% - 10% for 30 - 60 minutes. The surface polarity and roughness are improved through the etching effect of the alkaline solution, enhancing the mechanical interlock and chemical bonding with the cement matrix; the ceramsite is pre-wetted by adding water in two stages with a 5 - 10 r / min roller. In the first stage, water is added until the saturation water absorption rate reaches 20% - 30%, and then it is left standing for 10 - 15 minutes to allow the water to initially penetrate into the internal micropores. In the second stage, water is added to 50% - 70% of the saturation water absorption rate to avoid excessive surface water film thickness caused by rapid water absorption at one time. Through staged speed-controlled pre-wetting, the internal humidity gradient of the ceramsite is made uniform, reducing the shrinkage stress generated by the difference in water content inside and outside after pouring. At the same time, the interfacial transition zone structure between the lightweight aggregate and the mortar matrix is optimized, enhancing the overall density and vibration resistance of the concrete.

[0081] In step S2, a double-horizontal-shaft forced mixer is used. In the first stage, dry mixing is carried out at 400 - 600 r / min for 15 - 30 seconds, and in the second stage, dry mixing is carried out at 800 - 1000 r / min for 30 - 45 seconds.

[0082] Specifically, a double-horizontal-shaft forced mixer is used for dry mixing. In the first stage, dry mixing is carried out at a speed of 400 - 600 r / min for 15 - 30 seconds to initially mix the pre-treated ceramsite and fine aggregate evenly, forming a dispersed skeleton; in the second stage, the speed is increased to 800 - 1000 r / min and dry mixing is carried out for 30 - 45 seconds. Through the shear force generated by high-speed rotation, the cementitious material and powdered admixtures are evenly coated on the surface of the ceramsite and fine aggregate, eliminating the phenomenon of material agglomeration, ensuring that the particle size gradation of each component in the dry mixing system is matched and evenly distributed, laying a foundation for the homogeneity of the mortar matrix and the stability of the overall mechanical properties of the lightweight aggregate concrete during subsequent wet mixing.

[0083] In step S3, 70% - 85% of the total designed water volume is added, and stirring is carried out at a speed of 800 - 1200 r / min. The thickening agent is a viscosity modifier, and the addition amount is 0.1% - 0.5% of the mass of the cementitious material.

[0084] Specifically, first, 70% - 85% of the total designed water volume, a water reducing agent, and a thickening agent (viscosity modifier) accounting for 0.1% - 0.5% of the mass of the cementitious material are added, and stirring is carried out at a speed of 800 - 1200 r / min to form a mortar matrix. By precisely controlling the water addition amount and the amount of thickening agent, the mortar has appropriate fluidity and cohesion, which can not only ensure that the modified rubber particles are fully wrapped by the mortar after addition but also avoid the floating of lightweight aggregates caused by excessive water or difficult mixing caused by too little water. At the same time, the thickening agent enhances the interfacial adsorption force between the aggregate and the cementitious material by adjusting the mortar viscosity, improving the matrix homogeneity, and providing a stable matrix environment for subsequent fiber dispersion and optimization of the overall anti-microvibration performance of the concrete.

[0085] In step S4, the amplitude of the vibrating feeder device is 2 - 5 mm, the frequency is 20 - 50 Hz, and the rotational speed for fiber dispersion is 1000 - 1500 r / min.

[0086] Specifically, the steel fibers are evenly fed into the mixer through a vibrating feeder device with an amplitude of 2 - 5 mm and a frequency of 20 - 50 Hz. At the same time, dispersion stirring is carried out at a rotational speed of 1000 - 1500 r / min. The vibration energy is utilized to overcome the electrostatic adsorption and entanglement tendency between the fibers, so that the fibers are quickly untangled under the action of centrifugal force and shear force, and are evenly distributed in the mortar matrix in a single-filament state, avoiding the formation of stress concentration points due to fiber agglomeration. By precisely controlling the vibration parameters and stirring rotational speed, it is ensured that the fibers are randomly distributed in three-dimensional space, constructing a continuous mechanical conduction network, providing a multi-directional strengthening effect for lightweight aggregate concrete, and optimizing the overall anti-vibration performance of the base platform.

[0087] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A broadband three-way anti-microvibration base based on multiple energy-consuming mechanisms, including a lightweight aggregate concrete base (1), characterized in that, A plurality of three - dimensional spherical periodic structures are uniformly arranged inside the lightweight aggregate concrete base (1), and a plurality of three - dimensional particle dampers are uniformly arranged inside the lightweight aggregate concrete base (1). The three - dimensional spherical periodic structure includes a metal shell (2), the inner wall of the metal shell (2) is provided with a polyurethane rubber ball (3), and a steel mass ball (4) is arranged inside the polyurethane rubber ball (3). The three - dimensional particle damper includes a three - dimensional particle damper shell (5), and steel spherical particles (6) are arranged inside the three - dimensional particle damper shell (5). The outer wall of the lightweight aggregate concrete base (1) is provided with a bracing structure.

2. The broadband three-way anti-microvibration base station based on multiple energy dissipation mechanisms according to claim 1, characterized in that, The bracing structure includes a side brace (7), the outer wall of the side brace (7) is fixedly connected to the outer wall of the lightweight aggregate concrete base (1), a first fixing seat (8) is fixedly connected to the outer wall of the side brace (7), a first fixing column (9) is fixedly connected to the outer wall of the first fixing seat (8), a first support rod (12) is rotatably connected to the outer wall of the first fixing column (9), a rotating column (21) is rotatably connected to the inside of the first support rod (12), a sliding block (13) is fixedly connected to the outer wall of the rotating column (21), the outer wall of the sliding block (13) is slidably connected to a support frame (14), and a small abutting block (16) is fixedly connected to the outer wall of the support frame (14).

3. The broadband three-way anti-microvibration base station based on multiple energy consumption mechanisms according to claim 1, characterized in that, The bracing structure further includes a first damper (10), one end of the first damper (10) is fixedly connected to the outer wall of the side brace (7), a large abutting block (17) is fixedly connected to the other end of the side brace (7), a buffer spring (11) is slidably connected to the outer wall of the first damper (10), one end of the buffer spring (11) is fixedly connected to the outer wall of the side brace (7), and the other end of the buffer spring (11) is fixedly connected to the outer wall of the large abutting block (17).

4. The broadband three-way anti-microvibration base station based on multiple energy dissipation mechanisms according to claim 1, characterized in that, The bracing structure further includes a second fixing seat (19), the outer wall of the second fixing seat (19) is fixedly connected to the outer wall of the large abutting block (17), a second rotating rod (18) is fixedly connected to the inside of the second fixing seat (19), a second support rod (20) is rotatably connected to the outer wall of the second rotating rod (18), and the inside of the second support rod (20) is rotatably connected to the outer wall of the rotating column (21).

5. The broadband three-way anti-microvibration base based on multiple energy consumption mechanisms according to claim 1, characterized in that, The bracing structure further includes a second damper (15), one end of the second damper (15) is fixedly connected to the inner wall of the support frame (14), and the other end of the second damper (15) is fixedly connected to the outer wall of the sliding block (13).

6. The broadband three-way anti-microvibration base station based on multiple energy consumption mechanisms according to claim 1, characterized in that, The preparation method of the lightweight aggregate concrete base (1) includes the following steps: S1. Perform surface modification treatment on rubber particles and perform staged pre - wetting treatment on ceramsite. S2. Put the pretreated ceramsite and fine aggregate into a compulsory mixer for dry mixing, and then add cementitious materials and powdered admixtures and continue dry mixing. S3. Add part of the mixing water, water reducer and thickener and stir to form a mortar matrix, and then add modified rubber particles. S4. Add steel fibers through a vibrating feeding device and perform dispersion stirring. S5. Supplement the mixing water and continue stirring until homogenization and then pour and mold.

7. The broadband three-way anti-microvibration base station based on multiple energy consumption mechanisms according to claim 1, characterized in that, In the step S1, the rubber particles are treated in an alkaline solution environment at 25°C - 40°C for 30 - 60 minutes, the concentration of the alkaline solution is 5% - 10%, the ceramsite is pre-wetted by adding water in two stages with a roller at 5 - 10 r / min. In the first stage, water is added until the saturated water absorption rate reaches 20% - 30%, and then it is left standing for 10 - 15 minutes. In the second stage, water is added until the saturated water absorption rate reaches 50% - 70%.

8. The broadband three-way anti-microvibration base station based on multiple energy dissipation mechanisms according to claim 1, characterized in that, In the step S2, a double-horizontal-shaft forced mixer is used. In the first stage, dry mixing is carried out at 400 - 600 r / min for 15 - 30 seconds, and in the second stage, dry mixing is carried out at 800 - 1000 r / min for 30 - 45 seconds.

9. The broadband three-way anti-microvibration base station based on multiple energy consumption mechanisms according to claim 1, characterized in that, In the step S3, 70% - 85% of the total designed water volume is added, and stirring is carried out at a rotation speed of 800 - 1200 r / min. The thickening agent is a viscosity modifier, and the addition amount is 0.1% - 0.5% of the mass of the gelling material.

10. The broadband three-way anti-microvibration base based on multiple energy-consuming mechanisms according to claim 1, characterized in that, In the step S4, the amplitude of the vibrating feeding device is 2 - 5 mm and the frequency is 20 - 50 Hz, and the fiber dispersion rotation speed is 1000 - 1500 r / min.

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