Self-adaptive viscous damping vibration isolation device for bottom of music hall base

Abstract

The invention relates to the technical field of constructional engineering, in particular to a self-adaptive viscous damping vibration isolation device for the bottom of a music hall base, comprising a floating bearing layer, a damping adjusting layer and a base connecting layer which are sequentially arranged from top to bottom from the bottom of a building; through the synergistic effect of the floating bearing layer, the damping adjusting layer and the base connecting layer, self-adaptive vibration isolation of music hall base vibration is achieved, and preliminary buffering is provided for vibration through sliding fit of the floating bearing layer; in the damping adjusting layer, a damping cylinder can automatically adjust damping according to the magnitude of vibration through cooperation of inertia of a plugging piece and an elastic piece without additional control, low damping is kept during small vibration to avoid excessive constraint, damping is increased during large vibration to efficiently isolate vibration, the adaptability and accuracy of vibration isolation are ensured, electric drive or a complex control system is not needed, and the cost is reduced. The structure is reliable, maintenance is easy and convenient, continuous and stable work can be achieved under different vibration working conditions, and reliable vibration isolation guarantee is provided for creating a stable acoustic environment for a music hall.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to an adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation. Background Technology

[0002] As cultural buildings centered on acoustic experience, concert halls are extremely sensitive to vibration interference in their internal acoustic environment. Vibrations from external traffic (such as vehicles and subways), surrounding construction, or internal equipment operation (such as air conditioning units and lighting fixtures) are transmitted through the foundation to the concert hall's base, and then upwards along the base to the main structure (such as the auditorium, stage, and acoustic reflectors), causing minute vibrations in the building structure. These vibrations directly interfere with the propagation and reflection of sound waves, causing problems such as sound quality distortion and low-frequency noise superposition, seriously affecting the audience's auditory experience and performance effect. Therefore, extremely high requirements are placed on the vibration isolation performance of the concert hall's base.

[0003] Currently, the commonly used foundation vibration isolation solutions in the construction field mainly include three categories: rigid vibration isolation (such as concrete pads), elastic vibration isolation (such as rubber pads and ordinary springs), and traditional viscous damping vibration isolation. Among them, rigid vibration isolation can only isolate high-frequency, large-amplitude vibrations, and its isolation effect on low-frequency micro-vibrations is extremely poor, which cannot meet the needs of concert halls for micro-vibration control; elastic vibration isolation can absorb some vibration energy through the deformation of rubber or springs, but the damping coefficient is fixed. When encountering small-amplitude vibrations, it is easy to generate resonance, which amplifies the vibration interference. When facing large-amplitude vibrations, the insufficient damping leads to low vibration attenuation efficiency, making it difficult to achieve adaptive adjustment of "small vibrations not amplified, large vibrations efficiently isolated"; traditional viscous damping vibration isolation devices can attenuate vibrations through the viscous resistance of damping oil, but they mostly adopt a fixed oil hole structure, which requires manual adjustment of damping parameters according to vibration conditions. They cannot automatically adjust the oil hole flow area with real-time changes in vibration intensity, and their structure is mostly linearly arranged, which is difficult to adapt to the installation space of the annular distribution of the concert hall base, resulting in local vibration isolation blind spots after installation, which cannot fully cover the vibration transmission path of the base. Summary of the Invention

[0004] To address the aforementioned issues, an adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation is provided. Through the synergistic action of a floating load-bearing layer, a damping adjustment layer, and a foundation connection layer, adaptive vibration isolation of the concert hall foundation vibration is achieved. The sliding fit of the floating load-bearing layer provides initial buffering for vibration. In the damping adjustment layer, the damping cylinder utilizes the inertia of the sealing component and the cooperation of the elastic component to automatically adjust the damping according to the vibration magnitude without additional control. Low damping is maintained during small vibrations to avoid excessive constraint, while increased damping is used for large vibrations for efficient vibration isolation, ensuring the adaptability and accuracy of the vibration isolation. It requires no electric drive or complex control system, is structurally reliable, easy to maintain, and can operate stably under different vibration conditions, providing reliable vibration isolation protection for a stable acoustic environment in the concert hall.

[0005] To address the problems of existing technologies, this invention provides an adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation, comprising a floating load-bearing layer, a damping adjustment layer, and a foundation connection layer arranged sequentially from top to bottom of the building; the foundation connection layer includes an annular steel channel and a mounting shaft, the annular steel channel being fixed to the foundation, and the mounting shaft being vertically fixed to the center of the annular steel channel; the damping adjustment layer includes a cross steel frame and multiple damping cylinders, the center of the cross steel frame being fixedly connected to the top of the mounting shaft, and multiple damping rods being respectively disposed at the four ends of the cross steel frame; the damping cylinder is provided with a piston, an elastic element, and a sealing element, the piston being slidably disposed inside the damping cylinder, and having an oil hole for damping oil to flow through the piston; the elastic element is disposed between the sealing element and the piston, and the sealing element can move relative to the piston due to the inertia generated by vibration to adjust the flow area of ​​the oil hole; the floating load-bearing layer can slide along the annular steel channel.

[0006] Preferably, the cross-section of the annular steel channel is concave, and the inner sidewall of the annular steel channel is fitted with a lubricating layer; the bottom wall of the annular steel channel has multiple anchor bolt holes arranged at equal intervals around its axis.

[0007] Preferably, the inner bottom wall of the annular steel channel is provided with a matching spring plate, the spring plate being annular in shape and having a continuous wavy undulation on its surface.

[0008] Preferably, the bottom of the floating support layer is fixedly connected to multiple T-shaped sliders, and the sliders are all fixedly connected to the bottom edge of the floating support layer; the bottom of the sliders matches the annular steel groove.

[0009] Preferably, the floating support layer is a precast slab made of reinforced concrete, the precast slab has a steel mesh inside, and the top surface of the precast slab has multiple bolt holes.

[0010] Preferably, the lubricating layer is a polytetrafluoroethylene sheet or a graphite coating.

[0011] Preferably, a buffer is provided between the cross steel frame and the floating support layer. The buffer is a honeycomb rubber pad. The rubber pad is fixedly connected to the bottom surface of the floating support layer at the positions corresponding to the center of the cross steel frame and each end of the cross steel frame, and the bottom of the rubber pad is in contact with the surface of the cross steel frame.

[0012] Preferably, the floating support layer also includes multiple L-shaped blocks, which are fixed at intervals along the edge of the precast slab. Each block includes an integrally formed horizontal section and a vertical section. The horizontal section is fixedly connected to the bottom surface of the precast slab, and the vertical section extends toward the annular steel groove. The vertical section is arranged opposite to the outer wall of the annular steel groove to limit the maximum displacement of the precast slab sliding along the annular steel groove.

[0013] Preferably, the cross-shaped steel frame is formed by welding multiple solid steel beams together. The central intersection point of the cross-shaped steel frame is fixedly connected to the top of the mounting shaft, and the steel beams of the cross-shaped steel frame are symmetrically distributed with the axis of the mounting shaft.

[0014] Preferably, the cylinder body of the damping cylinder is a seamless steel pipe, and the inner wall of the cylinder body is provided with a chrome-plated layer; the inside of the cylinder body is filled with damping oil, and the damping oil fills the gap between the cylinder body and the piston.

[0015] The advantages of this invention compared to the prior art are: 1. This invention achieves adaptive vibration isolation of the concert hall foundation through the synergistic action of a floating bearing layer, a damping adjustment layer, and a base connection layer. The sliding fit of the floating bearing layer provides initial buffering for vibration. In the damping adjustment layer, the damping cylinder utilizes the inertia of the sealing component and the cooperation of the elastic component to automatically adjust the damping according to the vibration magnitude without additional control. It maintains low damping to avoid excessive constraint during small vibrations and increases damping for efficient vibration isolation during large vibrations, ensuring the adaptability and accuracy of vibration isolation. It requires no electric drive or complex control system, has a reliable structure, is easy to maintain, and can work continuously and stably under different vibration conditions, providing reliable vibration isolation guarantee for creating a stable acoustic environment for the concert hall.

[0016] 2. The present invention effectively reduces sliding friction and wear between components by setting a lubrication layer, extending the service life of the device, while ensuring that the floating bearing layer responds more promptly to the initial buffering of vibration; the anchor bolt holes equidistantly surrounding the bottom wall make the annular steel channel more firmly fixed to the foundation and the force is balanced, preventing the steel channel from deforming or shifting, further improving the support reliability of the base connection layer, providing a stable foundation for the coordinated vibration isolation of the damping adjustment layer and the floating bearing layer, and ensuring that the entire device can stably play a vibration isolation role under different vibration conditions. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of an adaptive viscous damping vibration isolation device for the base of a concert hall. Figure 1 .

[0018] Figure 2 A three-dimensional structural diagram of an adaptive viscous damping vibration isolation device for the base of a concert hall. Figure 2 .

[0019] Figure 3 This is a cross-sectional structural diagram of an adaptive viscous damping vibration isolation device used at the bottom of a concert hall foundation.

[0020] Figure 4 This is a cross-sectional three-dimensional structural diagram of an adaptive viscous damping vibration isolation device used at the bottom of a concert hall foundation.

[0021] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0022] Figure 6 This is a schematic diagram of a three-dimensional structure of a floating load-bearing layer in an adaptive viscous damping vibration isolation device used at the bottom of a concert hall foundation.

[0023] Figure 7 This is a three-dimensional structural diagram of the base connection layer in an adaptive viscous damping vibration isolation device used at the bottom of a concert hall base.

[0024] Figure 8 This is an exploded view of the base connection layer in an adaptive viscous damping vibration isolation device used at the bottom of a concert hall base.

[0025] Figure 9 This is an exploded view of the damping cylinder in an adaptive viscous damping vibration isolation device used at the base of a concert hall.

[0026] Figure 10 yes Figure 9 Enlarged view of point B in the middle.

[0027] The following are the labels in the diagram: 1. Floating bearing layer; 11. Sliding block; 12. Buffer; 13. Stop; 2. Damping adjustment layer; 21. Cross steel frame; 211. Steel beam; 22. Damping cylinder; 221. Piston; 2211. Oil hole; 2212. Sealing component; 2213. Elastic component; 3. Base connection layer; 31. Annular steel channel; 311. Spring plate; 32. Mounting shaft. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 4 , Figures 6 to 10As shown: An adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation includes a floating load-bearing layer 1, a damping adjustment layer 2, and a foundation connection layer 3 arranged sequentially from top to bottom of the building. The foundation connection layer 3 includes an annular steel channel 31 and a mounting shaft 32. The annular steel channel 31 is fixed to the foundation, and the mounting shaft 32 is vertically fixed to the center of the annular steel channel 31. The damping adjustment layer 2 includes a cross steel frame 21 and multiple damping cylinders 22. The center of the cross steel frame 21 is fixedly connected to the top of the mounting shaft 32, and the multiple damping rods are respectively... The damping cylinder 22 is provided with a piston 221, an elastic element 2213, and a sealing element 2212. The piston 221 is slidably disposed inside the damping cylinder 22 and has an oil hole 2211 for damping oil to flow through it. The elastic element 2213 is disposed between the sealing element 2212 and the piston 221. The sealing element 2212 can move relative to the piston 221 with the inertia generated by vibration to adjust the flow area of ​​the oil hole 2211. The floating bearing layer 1 can slide along the annular steel groove 31.

[0030] When the main structure of the concert hall transmits vibrations to the floating support layer 1, the floating support layer 1 can slide along the annular steel groove 31 of the base connection layer 3 to initially buffer the vibrations; at the same time, the vibration drives the damping cylinder 22 of the damping adjustment layer 2 to work, and the piston 221 in the damping cylinder 22 slides relative to the cylinder body with the vibration. At this time, the sealing part 2212 in the damping cylinder 22 moves relative to the piston 221 due to its own inertia. When small vibrations occur, the inertia of the sealing element 2212 is small, and its relative displacement with the piston 221 is small under the constraint of the elastic element 2213. The flow area of ​​the oil hole 2211 on the piston 221 changes little, and the damping oil can pass through the oil hole 2211 relatively smoothly to achieve low-damping buffering. When the vibration becomes larger, the inertia of the sealing element 2212 increases, and it produces a larger displacement relative to the piston 221. This squeezes the elastic element 2213 and changes the flow area of ​​the oil hole 2211, increasing the resistance of the damping oil passing through the oil hole 2211. Consequently, the damping of the damping cylinder 22 increases, thus more effectively attenuating large vibrations.

[0031] This device achieves adaptive vibration isolation of the concert hall's foundation through the coordinated action of the floating support layer 1, the damping adjustment layer 2, and the base connection layer 3. The sliding fit of the floating support layer 1 provides initial buffering for vibration. In the damping adjustment layer 2, the damping cylinder 22 utilizes the inertia of the sealing component 2212 and the cooperation of the elastic component 2213 to automatically adjust the damping according to the magnitude of vibration without additional control. It maintains low damping to avoid excessive constraint during small vibrations and increases damping for efficient vibration isolation during large vibrations, ensuring the adaptability and accuracy of vibration isolation. It requires no electric drive or complex control system, has a reliable structure, is easy to maintain, and can work continuously and stably under different vibration conditions, providing reliable vibration isolation guarantee for creating a stable acoustic environment for the concert hall.

[0032] like Figures 3 to 5 , Figure 7 and Figure 8 As shown: the cross-section of the annular steel channel 31 is concave, and the inner sidewall of the annular steel channel 31 is fitted with a lubricating layer; the bottom wall of the annular steel channel 31 is provided with a plurality of anchor bolt holes arranged at equal intervals around its axis.

[0033] The annular steel trough 31, with its concave cross-section, forms a track for the sliding of the floating support layer 1, providing stable guidance for the sliding of the floating support layer 1 and preventing it from deviating from the preset sliding direction during vibration buffering. The lubricating layer on the inner wall of the annular steel trough 31 reduces the frictional resistance between the floating support layer 1 and the inner wall of the steel trough when the floating support layer 1 slides along the concave trough wall, ensuring that the floating support layer 1 can slide smoothly with vibration and avoiding the impact of friction jamming on the initial buffering effect. The anchor bolt holes on the bottom wall of the annular steel trough 31 are arranged equidistantly around the axis of the steel trough. When fasteners are inserted, the fixing force can be evenly distributed along the circumference of the steel trough, stably fixing the annular steel trough 31 to the foundation and preventing the annular steel trough 31 from tilting or shifting under vibration, providing a stable bottom support for the entire vibration isolation device.

[0034] The concave cross-sectional structure of the annular steel trough 31 can precisely match the sliding requirements of the floating bearing layer 1, ensuring the stability and directionality of the sliding process and preventing vibration isolation failure due to sliding displacement. The lubrication layer on the inner wall effectively reduces sliding friction, reduces wear between components, extends the service life of the device, and ensures that the floating bearing layer 1 responds more promptly to the initial buffering of vibration. The anchor bolt holes equidistantly surrounding the bottom wall make the annular steel trough 31 more firmly fixed to the foundation and the force is balanced, preventing the steel trough from deforming or shifting, further improving the support reliability of the base connection layer 3, providing a stable foundation for the coordinated vibration isolation of the damping adjustment layer 2 and the floating bearing layer 1, and ensuring that the entire device can stably play a vibration isolation role under different vibration conditions.

[0035] like Figures 2 to 5 , Figure 7 and Figure 8 As shown: The inner bottom wall of the annular steel groove 31 is provided with a matching spring plate 311. The spring plate 311 is annular in shape and has a continuous wave-like undulation on its surface.

[0036] When the floating support layer 1 slides or displaces along the annular steel trough 31 due to vibration, the bottom of the floating support layer 1 will contact the top of the wave-shaped spring sheet 311 inside the annular steel trough 31. At this time, the spring sheet 311, with its overall annular structure and continuous wave-like undulations on the surface, undergoes elastic deformation when subjected to pressure or vibration transmission, converting vibration energy into deformation energy of the spring sheet 311, thereby buffering the movement or vibration of the floating support layer 1.

[0037] The annular spring plate 311 ensures that the floating support layer 1 can fully contact the spring plate 311 to achieve buffering when sliding in all directions, avoiding uneven local stress. The continuous wave-like undulations on the surface of the spring plate 311 give it a more flexible deformation capability, which can effectively absorb the energy of micro-vibrations and buffer the impact force with a larger deformation during larger vibrations. At the same time, the elastic recovery characteristics of the spring plate 311 help the floating support layer 1 to reset after the vibration weakens, further improving the device's adaptability to vibrations of different degrees and its vibration isolation effect, and enhancing the overall stability and continuity of vibration isolation.

[0038] like Figures 2 to 6 As shown: Multiple T-shaped sliders 11 are fixedly connected to the bottom of the floating support layer 1, and the multiple sliders 11 are all fixedly connected to the bottom edge of the floating support layer 1; the bottom of the sliders 11 matches the annular steel groove 31.

[0039] When the main structure of the concert hall transmits vibrations to the floating support layer 1, multiple T-shaped sliders 11 on the bottom edge of the floating support layer 1 slide along the annular steel groove 31. Because the bottom of the sliders 11 matches the annular steel groove 31, they provide stable guidance for the movement of the floating support layer 1, allowing it to smoothly displace along the groove and initially buffer the vibrations. The distribution of multiple T-shaped sliders 11 on the bottom edge of the floating support layer 1 ensures a more balanced force and guidance, preventing deviation or jamming during sliding. The matching structure between the sliders 11 and the annular steel groove 31 ensures smooth sliding to reduce frictional resistance and provides reliable constraint on the floating support layer 1, gradually dispersing vibration energy during sliding. Combined with the damping adjustment layer 2, this further enhances the vibration isolation effect, allowing the device to achieve initial vibration isolation through the stable sliding of the sliders 11 under vibration conditions in different directions, thus enhancing the stability and reliability of the entire vibration isolation system.

[0040] like Figure 1 and Figure 6 As shown: the floating support layer 1 is a precast slab made of reinforced concrete. The precast slab has a steel mesh inside and multiple bolt holes on the top surface.

[0041] Once the main structure of the concert hall is fixedly connected to the floating load-bearing layer 1 through the pre-embedded bolt holes on the top surface of the precast slab, the load and vibration of the main structure will be transmitted to the precast slab. The steel mesh inside the precast slab enhances its structural strength and integrity, making it less prone to cracking, deformation, or other damage when bearing the weight and vibration of the main structure. It can stably bear the load and provide foundation support for subsequent vibration isolation. At the same time, the precast slab, made of reinforced concrete, combines the durability of concrete with the crack resistance of steel. It can initially buffer the transmitted vibrations by utilizing its own mass and stiffness characteristics. Then, in conjunction with the synergistic effect of the damping adjustment layer 2 and the base connection layer 3, it further creates a stable vibration environment for the main structure of the concert hall, ensuring the stability of the acoustic effect.

[0042] like Figures 1 to 5 As shown: The lubricating layer is a polytetrafluoroethylene sheet or a graphite coating.

[0043] When the floating support layer 1 slides along the annular steel trough 31, the slider 11 is in direct contact with the lubricating layer. The polytetrafluoroethylene (PTFE) or graphite material itself has a low coefficient of friction, which significantly reduces the sliding resistance between the slider 11 and the inner wall of the steel trough. This ensures that the floating support layer 1 can move flexibly under vibration, preventing excessive friction from causing sliding jamming or lag, thus affecting the initial buffering effect. The lubricating layer can be fixed by bonding, tightly adhering to the inner wall of the steel trough to prevent detachment or displacement during vibration. Simultaneously, PTFE and graphite materials are wear-resistant and anti-aging, maintaining lubrication performance for a long time, reducing mechanical wear between components, extending the service life of the device, and ensuring the long-term stable and effective sliding fit of the floating support layer 1, providing a guarantee for the continuous and reliable operation of the entire vibration isolation system.

[0044] like Figures 2 to 4 As shown: A buffer 12 is provided between the cross steel frame 21 and the floating support layer 1. The buffer 12 is a honeycomb rubber pad. The rubber pad is fixedly connected to the bottom surface of the floating support layer 1, corresponding to the center of the cross steel frame 21 and the positions of each end of the cross steel frame 21, and the bottom of the rubber pad is in contact with the surface of the cross steel frame 21.

[0045] Since the rubber pads are fixed to the bottom surface of the floating support layer 1 at the center and ends of the cross steel frame 21, and these locations are the key nodes for vibration transmission between the cross steel frame 21 and the floating support layer 1, vibration energy will preferentially act on the rubber pads. Due to its elastic properties and honeycomb structure, the rubber pads deform under vibration pressure, and the honeycomb pores contract or expand with pressure, converting vibration energy into deformation energy of the rubber pads. This provides initial absorption and attenuation of the vibration. Only a small amount of remaining vibration energy is then transmitted to the cross steel frame 21, where it is further processed by the damping adjustment layer 2.

[0046] The honeycomb structure allows the rubber pad to distribute vibration pressure more evenly during deformation, preventing damage caused by excessive local stress. The honeycomb structure also enhances the rubber pad's deformation flexibility, effectively buffering both minor and major vibrations through appropriate deformation. The fixed positions of the rubber pad at the center and ends of the cross-shaped steel frame 21 precisely cover the core path of vibration transmission, eliminating blind spots and ensuring sufficient pre-treatment of vibration before it reaches the cross-shaped steel frame 21. The close fit between the bottom of the rubber pad and the surface of the cross-shaped steel frame 21 ensures stable contact during vibration transmission, preventing interruptions or additional noise due to gaps. Furthermore, the flexibility of the rubber material reduces mechanical wear between the floating support layer 1 and the cross-shaped steel frame 21, extending their service life and further improving the overall vibration isolation effect of the device, creating a more stable acoustic environment for the concert hall.

[0047] like Figures 1 to 6 As shown: The floating support layer 1 also includes a plurality of L-shaped blocks 13. The blocks 13 are fixed at intervals along the edge of the precast slab. The blocks 13 include an integrally formed horizontal section and a vertical section. The horizontal section is fixedly connected to the bottom surface of the precast slab, and the vertical section extends toward the annular steel groove 31. The vertical section is arranged opposite to the outer wall of the annular steel groove 31 to limit the maximum displacement of the precast slab sliding along the annular steel groove 31.

[0048] When the main body of the concert hall transmits vibrations to the floating bearing layer 1, the precast slab slides along the annular steel channel 31 to buffer the vibrations. As the vibration amplitude increases, the sliding displacement of the precast slab gradually increases. At this time, the vertical section of the stop block 13, which is fixed at intervals along the edge of the precast slab, will gradually approach the outer wall of the annular steel channel 31 as the precast slab slides. When the displacement of the precast slab reaches the preset limit, the vertical section contacts the outer wall of the annular steel channel 31, forming a physical barrier to prevent the precast slab from continuing to slide beyond the sliding range. At the same time, the horizontal section of the stop block 13 provides stable support for the vertical section through a fixed connection with the bottom surface of the precast slab, ensuring the reliable transmission of the limiting effect.

[0049] The spaced arrangement of the blocks 13 ensures that the sliding of the precast slab in all directions is uniformly constrained, preventing localized stress concentration that could lead to deformation of the precast slab or steel channel. The integrally formed structure of the horizontal and vertical sections of the blocks 13 enhances the structural strength of the blocks 13 themselves, enabling them to withstand large displacement impacts without easily being damaged. Through the relative arrangement of the vertical section and the outer wall of the annular steel channel 31, the maximum displacement of the precast slab can be limited without complex control, preventing the floating bearing layer 1 from detaching from the base connection layer 3 due to excessive sliding or from colliding with surrounding components. This further ensures the structural integrity and operational stability of the entire vibration isolation device, ensuring the continuous effectiveness of the vibration isolation function and providing additional protection for the stability of the acoustic environment of the concert hall.

[0050] like Figures 2 to 4, Figure 7 and Figure 8 As shown: the cross steel frame 21 is formed by welding multiple solid steel beams 211 together. The central intersection point of the cross steel frame 21 is fixedly connected to the top of the mounting shaft 32, and the steel beams 211 of the cross steel frame 21 are symmetrically distributed with the axis of the mounting shaft 32.

[0051] The cross-shaped steel frame 21, as the core force transmission and support component, bears the vibration load and transmits it to the damping cylinders 22 at each end. The structure, formed by the cross-welding of multiple solid steel beams 211, relies on the rigidity of the solid material and the integrity of the welded connections to stably bear the load, preventing breakage or loosening of the steel beams 211 during vibration and ensuring the load is completely transmitted to each damping cylinder 22. The fixed connection between the central intersection point of the cross-shaped steel frame 21 and the top of the mounting shaft 32 allows the mounting shaft 32 to provide central support for the cross-shaped steel frame 21, preventing it from tilting or shifting under vibration. Simultaneously, the symmetrical distribution of each steel beam 211 around the axis of the mounting shaft 32 evenly distributes the vibration load transmitted from different directions to each steel beam 211, which then synchronously transmits it to the corresponding damping cylinder 22. This allows each damping cylinder 22 to receive a balanced vibration signal and collaboratively adjust the damping to attenuate the vibration.

[0052] The structural characteristics of the solid steel beam 211 endow the cross steel frame 21 with sufficient impact and deformation resistance, enabling it to withstand vibration loads for a long time while maintaining structural stability and extending the service life of the device. The fixed connection between the center and the mounting shaft 32 provides reliable positioning support for the cross steel frame 21, preventing the damping adjustment layer 2 from malfunctioning due to support failure. The symmetrical distribution of each steel beam 211 ensures the balance of load transmission, preventing some steel beams 211 or damping cylinders 22 from prematurely damaging due to local overload. At the same time, it ensures that the device can achieve stable vibration isolation through the symmetrical structure under vibration in different directions such as lateral and longitudinal directions, avoiding vibration isolation blind spots due to uneven force distribution, further improving the working reliability of the entire damping adjustment layer 2, and providing stable protection for the vibration protection of the concert hall base.

[0053] like Figures 2 to 4 and Figure 9 As shown: The cylinder body of the damping cylinder 22 is a seamless steel pipe, and the inner wall of the cylinder body is provided with a chrome-plated layer; the inside of the cylinder body is filled with damping oil, and the damping oil fills the gap between the cylinder body and the piston 221.

[0054] When the piston 221 in the vibration-driven damping cylinder 22 slides relative to the cylinder body, the cylinder body, made of seamless steel pipe, provides a stable sliding cavity for the piston 221, preventing the cylinder body from deforming due to vibration impact or pressure, and ensuring that the piston 221 always slides along the preset trajectory. The chrome-plated layer on the inner wall of the cylinder body can reduce the direct friction between the piston 221 and the inner wall of the cylinder body, reduce the resistance when the piston 221 slides, prevent the piston 221 from jamming or the parts from wearing due to excessive friction, and allow the piston 221 to move smoothly with the vibration. At the same time, the damping oil filled in the gap between the cylinder body and the piston 221 will flow with the sliding of the piston 221. The resistance is formed by the viscosity of the oil itself. Together with the adjustment of the flow area of ​​the oil hole 2211 by the sealing part 2212 on the piston 221, the damping magnitude of the damping cylinder 22 is changed.

[0055] The seamless steel pipe cylinder body possesses high structural strength and sealing performance, enabling it to withstand the pressure and vibration impact of damping oil over long periods, preventing cylinder leakage or damage and ensuring the long-term stable operation of the damping cylinder 22. The chrome-plated layer on the inner wall not only reduces friction but also enhances the wear resistance and corrosion resistance of the cylinder body, extending the service life of the cylinder body and piston 221 and reducing maintenance requirements. The damping oil filling the gaps ensures that oil is always involved in damping adjustment during the sliding process of piston 221, avoiding component damage caused by dry friction. At the same time, the viscosity of the oil makes damping adjustment smoother, avoiding additional noise during vibration transmission, further improving the working reliability and acoustic adaptability of the vibration isolation device, and providing key guarantees for the stable vibration isolation of the concert hall foundation.

[0056] It should be noted that the piston 221 has a guide and a limiting block. The guide ensures that the sealing component 2212 can accurately seal the oil hole 2211, while the limiting block limits the displacement distance of the piston 221.

[0057] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. An adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation, characterized in that, It includes a floating load-bearing layer (1), a damping adjustment layer (2), and a base connection layer (3) arranged sequentially from the bottom of the building to the top. The base connection layer (3) includes an annular steel groove (31) and a mounting shaft (32). The annular steel groove (31) is used to fix to the foundation, and the mounting shaft (32) is vertically fixed to the center of the annular steel groove (31). The damping adjustment layer (2) includes a cross steel frame (21) and multiple damping cylinders (22). The center of the cross steel frame (21) is fixedly connected to the top of the mounting shaft (32), and multiple damping rods are respectively set at the four ends of the cross steel frame (21). The damping cylinder (22) is provided with a piston (221), an elastic element (2213) and a sealing element (2212). The piston (221) is slidably disposed inside the damping cylinder (22), and the piston (221) is provided with an oil hole (2211) for the flow of damping oil. The elastic element (2213) is disposed between the sealing element (2212) and the piston (221). The sealing element (2212) can move relative to the piston (221) with the inertia generated by vibration to adjust the flow area of ​​the oil hole (2211). The floating bearing layer (1) can slide along the annular steel groove (31).

2. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 1, characterized in that, The cross-section of the annular steel channel (31) is concave, and the inner sidewall of the annular steel channel (31) is fitted with a lubricating layer; the bottom wall of the annular steel channel (31) is provided with multiple anchor bolt holes arranged equidistantly around its axis.

3. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 2, characterized in that, The inner bottom wall of the annular steel channel (31) is provided with a matching spring plate (311). The spring plate (311) is annular in shape and has a continuous wave-like undulation on its surface.

4. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 2, characterized in that, Multiple T-shaped sliders (11) are fixedly connected to the bottom of the floating support layer (1), and the multiple sliders (11) are fixedly connected to the bottom edge of the floating support layer (1); the bottom of the sliders (11) matches the annular steel groove (31).

5. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 1, characterized in that, The floating support layer (1) is a precast slab made of reinforced concrete. The precast slab has a steel mesh inside and multiple bolt holes on the top surface.

6. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 5, characterized in that, The lubricating layer is a polytetrafluoroethylene sheet or a graphite coating.

7. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 1, characterized in that, A buffer (12) is provided between the cross steel frame (21) and the floating bearing layer (1). The buffer (12) is a honeycomb rubber pad. The rubber pad is fixedly connected to the bottom surface of the floating bearing layer (1) corresponding to the center of the cross steel frame (21) and the positions of each end of the cross steel frame (21). The bottom of the rubber pad is in contact with the surface of the cross steel frame (21).

8. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 5, characterized in that, The floating support layer (1) also includes multiple L-shaped blocks (13), which are fixed at intervals along the edge of the precast slab. Each block (13) includes an integrally formed horizontal section and a vertical section. The horizontal section is fixedly connected to the bottom surface of the precast slab, and the vertical section extends toward the annular steel groove (31). The vertical section is arranged opposite to the outer wall of the annular steel groove (31) to limit the maximum displacement of the precast slab sliding along the annular steel groove (31).

9. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 1, characterized in that, The cross steel frame (21) is formed by welding multiple solid steel beams (211) together. The central intersection of the cross steel frame (21) is fixedly connected to the top of the mounting shaft (32), and the steel beams (211) of the cross steel frame (21) are symmetrically distributed with the axis of the mounting shaft (32).

10. The adaptive viscous damping vibration isolation device for the bottom of a concert hall foundation according to claim 1, characterized in that, The cylinder body of the damping cylinder (22) is a seamless steel pipe, and the inner wall of the cylinder body is provided with a chrome plating layer; the inside of the cylinder body is filled with damping oil, and the damping oil is filled in the gap between the cylinder body and the piston (221).

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