Negative poisson's ratio seismic double control damper

Abstract

The utility model relates to a kind of negative poisson's ratio vibration and shock double-control damper, including double-control energy dissipation component, bearing assembly, limiting component and protective cover, the double-control energy dissipation component is located in bearing assembly middle, the limiting component is fixed in bearing assembly outside, fixed bearing assembly and double-control energy dissipation component, the protective cover is located in double-control energy dissipation component outside, and is placed in bearing assembly middle;The double-control energy dissipation component includes negative poisson's ratio cylinder, high-damping inner core, wherein high-damping inner core is cylindrical, located in negative poisson's ratio cylinder inside.The utility model has the advantages that: by the synergistic effect of double-control energy dissipation component, when structure is vibrated, earthquake effect, reduce the vibration amplitude and frequency of structure, reach the remarkable vibration and shock double-control effect;Cylinder body uses negative poisson's ratio material and structure, avoids the phenomenon of "weak layer" in traditional design;High-damping inner core provides stable medium-high frequency shear energy dissipation and does not need heavy metal core material, improves acceleration response and comfort.

Description

Technical Field

[0001] This utility model belongs to the field of energy dissipation and vibration reduction in building structures, and relates to a negative Poisson's ratio vibration dual-control damper. Background Technology

[0002] With the acceleration of urbanization, the scale and complexity of buildings are constantly increasing, especially in high-rise buildings and large structures. Seismic performance and vibration control have become key issues in design. Traditional seismic design methods mainly rely on increasing structural stiffness to resist seismic forces. However, as building structures become increasingly complex, simply relying on stiffness is no longer effective in dealing with variable seismic waves and vibrations. Therefore, vibration control technology, especially damper technology, has gradually become an effective means to improve the seismic performance and comfort of building structures.

[0003] Currently, various damper technologies have been proposed and applied in building structures. Existing technologies mainly include viscous dampers, friction dampers, and spring dampers. These devices absorb vibration energy, reduce structural response, and improve seismic resistance. However, traditional dampers are often only suitable for vibrations of specific frequencies, and their energy absorption mechanisms are relatively simple, making them unable to cope with complex and variable vibration environments. For example, the multi-stage damper disclosed in patent CN114457928A provides lateral resistance to wind loads through inner and outer sleeves and rubber pads, but under seismic action, it mainly relies on the shear of weak holes to dissipate energy. However, this design performs poorly in the face of high-frequency vertical vibrations, and its post-earthquake recovery design has flaws, making it unable to flexibly cope with vibration conditions of different frequencies. In addition, although the ring spring composite conical rubber vibration control device in patent CN222435586U can provide good vertical vibration isolation, it is difficult to effectively control vibrations from different sources in complex vibration environments (such as when high-frequency mechanical vibrations and low-frequency seismic vibrations coexist). The effectiveness of this device in densely trafficked areas such as subways is limited, and it cannot meet the needs for multi-dimensional vibration control. Furthermore, the three-dimensional shear-type vibration dual-control device in patent CN115030233A utilizes finger-jointed plates and high-damping rubber layers to achieve multi-directional vibration isolation and control. However, near high-frequency vibration sources such as rail transit, the material properties of this device (such as metallic materials) may lead to the transmission of high-frequency vibrations, resulting in lower-than-expected control efficiency, especially under the combined effects of earthquakes and mechanical vibrations, where its performance is unsatisfactory.

[0004] Although these prior arts have achieved certain results in their respective application fields, they still have some deficiencies, especially in terms of poor adaptability when dealing with different frequencies and complex vibration conditions, insufficient post-earthquake recovery capability, etc. In addition, conventional dual vibration and shock control dampers generally adopt metals such as lead and tin as the main energy-consuming materials, which causes relatively serious pollution. Therefore, there is an urgent need for an environment-friendly and high-efficiency damper technology that can self-adapt to multi-frequency vibration and has stronger recovery capability, so as to meet the increasingly complex vibration control requirements of modern buildings and infrastructure. Contents of the Utility Model

[0005] The utility model aims to solve the problems of existing dampers such as poor adaptability under different frequencies and complex vibration conditions, high pollution, and insufficient post-earthquake recovery capability.

[0006] The utility model solves the above technical problems through the following technical means: A negative Poisson's ratio dual vibration and shock control damper, characterized by comprising a dual-control energy-consuming assembly, a bearing assembly, a limiting assembly and a protective cover, wherein the dual-control energy-consuming assembly is located in the middle of the bearing assembly; the limiting assembly is fixed on the outer side surface of the bearing assembly to fix the bearing assembly and the dual-control energy-consuming assembly; the protective cover is arranged on the outer side of the dual-control energy-consuming assembly and placed in the middle of the bearing assembly; the bearing assembly comprises an upper bearing plate and a lower bearing plate, both of which are metal rectangular plate-shaped members with a certain thickness; the dual-control energy-consuming assembly comprises a negative Poisson's ratio cylinder and a high-damping inner core; the negative Poisson's ratio cylinder is a curved cylindrical structure formed by combining a plurality of negative Poisson's ratio cylindrical units made of negative Poisson's ratio material; the high-damping inner core is a cylindrical core member formed by stacking a plurality of high-damping core units or integrally molded, and the stacked layers are connected by bonding; the high-damping inner core is located inside the negative Poisson's ratio cylinder, and an annular gap exists between the high-damping inner core and the negative Poisson's ratio cylinder; the limiting assembly comprises four limiting plates with a length longer than the middle energy-consuming body.

[0007] With the synergistic effect of the negative Poisson's ratio structure of the negative Poisson's ratio cylinder and the composite material of the high-damping inner core, the negative Poisson's ratio dual vibration and shock control damper of the utility model can not only control horizontal vibration under different earthquake intensities, but also provide effective energy consumption for earthquake damage. Through the hierarchical structural design, not only the vibration response control of the structure is enhanced, but also the yield mechanism and friction effect further enhance the vibration control effect.

[0008] As a preferred technical solution of the utility model, the negative Poisson's ratio cylindrical unit is a curved member with a bending rib in the middle and a shape similar to the Chinese character "Ya", and the number of the negative Poisson's ratio cylindrical units is no less than four.

[0009] The negative Poisson's ratio cylinder is designed with a curved cylindrical structure, which can generate a radial expansion effect under compression or shear, amplifying the energy absorption capacity. At the same time, the negative Poisson's ratio material can generate a significant outward expansion effect. This deformation mechanism makes the cylinder self-reinforcing under lateral pressure, thereby improving the energy dissipation capacity of the damper. The multi-layer structure can enhance the progressive yielding and multi-stage energy dissipation characteristics, and optimize the efficiency of energy absorption.

[0010] As a preferred technical solution of this utility model, the negative Poisson's ratio cylinder is formed by on-site welding of bent ribs, or by using annular integral connectors to form a series cylinder.

[0011] As a preferred technical solution of this utility model, the negative Poisson ratio cylinder is a single layer or multiple layers, and the connection between each layer of cylinder is fixed by an annular connector or a support structure.

[0012] As a preferred technical solution of this utility model, the high-damping inner core is made of a material with energy dissipation characteristics.

[0013] The core is made of materials with energy dissipation characteristics, such as high-damping rubber, laminated rubber-steel sheet (LRB-like), or integral cast elastomer, which, when combined with a negative Poisson's ratio cylinder, further enhances the energy dissipation effect.

[0014] As a preferred embodiment of this invention, the height of the high-damping inner core is higher than the height of the negative Poisson's ratio cylinder.

[0015] The height difference ensures that the internal core material absorbs vibration energy first when subjected to external loads, and the outer cylinder can deform sufficiently when subjected to pressure, thereby maximizing its vibration and shock absorption effect.

[0016] As a preferred technical solution of this utility model, the protective cover is a cylindrical hollow cover, which includes an inner reinforced adhesive layer, a middle heat insulation layer and an outer flame-retardant heat insulation layer from the inside to the outside, and the protective layers are tightly bonded together.

[0017] The overall enclosure is made by flexible molding or multi-piece splicing, which facilitates on-site installation and subsequent maintenance.

[0018] As a preferred technical solution of this utility model, the bearing assembly includes an upper bearing assembly and a lower bearing assembly; the upper bearing assembly includes an upper bolt, an upper nut, an upper bearing plate, an upper friction pad ring, an upper fixing bolt, and an upper fixing nut; the lower bearing assembly includes a lower bolt, a lower nut, a lower bearing plate, a lower friction pad ring, a lower fixing bolt, and a lower fixing nut; the upper bolt and upper nut are fitted together and fixed to the upper wall surface at the edge of the upper bearing plate, and the upper fixing bolt and upper fixing nut are fitted together and pass through the upper bearing plate, the upper friction pad ring, and the negative Poisson's ratio cylinder from top to bottom and are fixed thereto; the lower bolt and lower nut are fitted together and fixed to the lower wall surface at the edge of the lower bearing plate, and the lower fixing bolt and lower fixing nut are fitted together and pass through the lower bearing plate, the lower friction pad ring, and the negative Poisson's ratio cylinder from bottom to top and are fixed thereto.

[0019] As a preferred technical solution of this utility model, the upper friction pad ring and the lower friction pad ring are "cup lid type", the upper friction pad ring is located between the high damping inner core and the upper bearing plate, and the lower friction pad ring is located between the high damping inner core and the lower bearing plate.

[0020] As a preferred technical solution of this utility model, the limiting component includes a limiting plate, a limiting plate upper bolt, and a limiting plate lower bolt; the reserved screw hole at the upper part of the limiting plate is an oblong hole, the reserved screw hole at the lower part of the limiting plate is a round hole, and the middle part of the limiting plate adopts an arc design; the upper and lower ends of the limiting plate are respectively fixed to the sides of the upper bearing plate and the lower bearing plate by the limiting plate upper bolt and the limiting plate lower bolt.

[0021] The rounded arc weakening design effectively disperses stress when subjected to large shear forces, preventing local damage or failure and acting as a "safety" measure; the elongated hole design allows for a certain amount of small displacement and relative slippage under earthquake or wind vibration, avoiding premature high stress concentration caused by rigid constraints.

[0022] The advantages of this utility model are: (1) The negative Poisson's ratio cylinder of this application uses a novel negative Poisson's ratio material, and other structures also avoid the use of heavy metals such as lead. Compared with the traditional vibration dual-control damper that often uses lead as the energy dissipation core, the device of this application greatly improves the environmental protection and safety of the damper, ensuring that there is no leakage of toxic substances during production, use and dismantling, and greatly reducing the environmental burden. In addition, the fatigue resistance of the negative Poisson's ratio material is better than that of traditional lead, steel and other materials. Under long-term seismic action, the durability and stability of the structure are guaranteed. Compared with lead material, the negative Poisson's ratio material can maintain a higher energy dissipation capacity for a longer period of time, thereby greatly improving the service life of the damper. The damper can maintain good performance during long-term use, reducing the maintenance needs caused by material aging or damage. (2) The negative Poisson's ratio cylinder material of the device in this application enables the damper to absorb seismic energy in multiple directions. Especially when subjected to compression or shear, it can effectively generate a radial expansion effect, thereby enhancing the energy absorption capacity. This design optimizes the shortcomings of traditional single-direction energy absorption structures and significantly improves the overall damping effect. The negative Poisson's ratio cylinder in the device of this application, due to the use of negative Poisson's ratio material and negative Poisson's ratio structure, can make the deformation of the entire structure more uniform, avoiding the "weak layer" phenomenon that may occur in traditional designs. At the same time, the cylinder and the internal core can work together to maintain both sufficient stiffness and good flexibility. This ensures that the damper can effectively absorb seismic forces, especially when the vibration intensity is high, the energy dissipation effect of the damper is more significant. It can effectively prevent excessive vibration or damage to the structure, and will not affect the comfort of the building due to excessive structural rigidity. (3) The limiting component connects the upper and lower connecting plates, forming a continuous force-bearing system, avoiding the risk of local instability or separation of the high-energy-consuming core and the negative Poisson's ratio cylinder under large displacement. The upper part of the plate is provided with an elongated hole, which allows for a certain amount of small displacement and relative slippage under earthquake or wind vibration, avoiding premature high stress concentration due to rigid constraints. The lower part of the plate is a circular hole, forming a rigid limit. When the displacement exceeds the design threshold, it plays a forced limiting role, ensuring that the damper will not undergo uncontrolled deformation. The arc-shaped surface cut off in the middle is equivalent to forming a local weakening zone. When the limiting plate is subjected to alternating tension and compression, the arc-shaped area first enters yielding or local plastic deformation, thereby consuming energy. The plate and the negative Poisson's ratio cylinder structure in the middle form a multi-level energy dissipation mechanism, improving the overall energy dissipation capacity of the damper. Especially under multiple cyclic loading, it can effectively disperse stress and avoid premature failure of a single component; (4) The protective cover is easy to disassemble, and the cylinder structure or core can be replaced after an earthquake; the damper is designed with replaceable linings and layered components. Through simple maintenance operations, the service life of the damper can be extended, while ensuring its repairability after an earthquake; (5) The structural design of this device allows for adjustment of the number of cylinder layers and the selection of internal core materials (such as high-damping rubber, laminated rubber-steel sheets, etc.) according to requirements, enabling its flexible application in buildings of different sizes and properties. Compared with traditional lead-zinc dampers, it offers greater design flexibility and a wider range of applications. Moreover, the relevant parameters of the cylinder can be adjusted according to actual needs, providing precise customization based on requirements. (6) Compared with traditional vibration dual-control dampers, the device of this application uses high-cost materials (such as tin), and the use of negative Poisson's ratio materials and rubber materials makes the cost more economical. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of the negative Poisson's ratio vibration dual-control damper according to the first embodiment of this utility model; Figure 2 This is a perspective view of the negative Poisson's ratio vibration dual-control damper of the first embodiment of this utility model; Figure 3 This is an exploded view of the negative Poisson's ratio vibration dual-control damper of the first embodiment of this utility model; Figure 4 This is a schematic diagram of the negative Poisson's ratio vibration dual-control damper negative Poisson's ratio cylindrical unit according to the first embodiment of this utility model; Figure 5 This is a top view of the negative Poisson's ratio vibration dual-control damper of the first embodiment of this utility model; Figure 6 This is a schematic diagram of the double-layer negative Poisson's ratio vibration dual-control damper of the second embodiment of this utility model; Figure 7 This is a schematic diagram of the circular rib negative Poisson's ratio vibration dual-control damper of the third embodiment of this utility model; Numbering on the map: 1. Dual-control energy-consuming components; 11. Negative Poisson's ratio cylinder; 12. High-damping inner core; 2. Bearing assembly; 21. Upper bearing assembly; 211. Upper bearing plate; 212. Upper bolt; 213. Upper nut; 214. Upper friction pad ring; 215. Upper fixing nut; 216. Upper fixing bolt; 22. Lower bearing assembly; 221. Lower bearing plate; 222. Lower bolt; 223. Lower nut; 224. Lower friction pad ring; 225. Lower fixing nut; 226. Lower fixing bolt; 3. Limiting assembly; 31. Limiting plate; 32. Bolts on the upper limiting plate; 33. Bolts on the lower limiting plate; 4. Protective cover. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1: 1. Combination Figures 1-4As shown, this embodiment provides a negative Poisson's ratio vibration-seismic dual-control damper, which includes a dual-control energy dissipation assembly 1, a load-bearing assembly 2, a limit assembly 3 and a protective cover 4. The dual-control energy dissipation assembly 1 includes a negative Poisson's ratio cylinder 11 and a high-damping inner core 12, configured to realize dual control of vibration and earthquake; the load-bearing assemblies 2 are respectively located on the upper and lower surfaces of the dual-control energy dissipation assembly 1, configured to bear the vibration from the upper part of the structure and provide stable foundation support; the limit assembly 3 is configured to fix the load-bearing assembly 2 and the dual-control energy dissipation assembly 1; the protective cover 4 is configured to protect the dual-control energy dissipation assembly.

[0026] Specifically, according to Figures 1-5 As shown, in this embodiment, the negative Poisson's ratio cylinder 11 is composed of a plurality of negative Poisson's ratio cylindrical units, and these units are connected into a complete annular structure by a welding process. The negative Poisson's ratio cylindrical unit is made of a negative Poisson's ratio material (such as a negative Poisson's ratio metal or composite material), as Figure 4 As shown, its geometric shape is designed as a curved shear cell, with a shape similar to the Chinese character "Ya". A number of such units are assembled in an annular closed manner to form a hollow cylinder with a radius of R and a height of H . Under shear, due to its negative Poisson's ratio characteristic, a radial expansion effect will be generated, which amplifies the energy absorption capacity and forms a multi-directional energy dissipation mechanism. The high-damping inner core 12 is made of a material with energy dissipation properties, such as high-damping rubber, laminated rubber-steel sheets (LRB-like) that are laminated or integrally cast, that is, the high-damping inner core 12 is formed by laminating multiple pieces of disc-shaped high-damping materials with the same size or integrally formed. In this embodiment, the high-damping inner core 12 is formed by laminating and bonding multiple pieces of disc-shaped high-damping materials with the same size. The high-damping inner core 12 is cylindrical as a whole, with a radius slightly smaller than R , and is entirely placed inside the negative Poisson's ratio cylinder to form an annular gap between itself and the negative Poisson's ratio cylinder 11; its height is slightly greater than the height of the negative Poisson's ratio cylinder 1 H . Since the height of the high-damping inner core 12 is greater than that of the negative Poisson's ratio cylinder 11, when a small external force is applied, the high-damping inner core 12 deforms first to absorb vibration energy, at this time the negative Poisson's ratio cylinder 11 does not participate in yield energy dissipation, and the high-damping inner core 12 realizes small-amplitude vibration control; when the high-damping inner core 12 is subjected to a large external force, resulting in its radius variation being greater than the annular gap between the negative Poisson's ratio cylinder 11 and the high-damping inner core 12, at this time the negative Poisson's ratio cylinder 11 is subjected to the outward expansion shear action of the high-damping inner core 12, and the negative Poisson's ratio cylinder 11 and the high-damping inner core 12 enter a synergistic energy dissipation stage. The dual-control energy dissipation assembly 1 can enable the damper to provide continuous shock absorption effects under different earthquake intensities, while avoiding the possible fatigue or failure problems of a single material, so as to realize dual control of vibration and earthquake.

[0027] As Figure 2As shown, in this embodiment, the bearing assembly 2 includes an upper bearing assembly 21 and a lower bearing assembly 22. The upper bearing assembly 21 includes an upper bearing plate 211, an upper bolt 212, an upper nut 213, an upper friction pad ring 214, an upper fixing nut 215, and an upper fixing bolt 216. The lower bearing assembly 22 includes a lower bearing plate 221, a lower bolt 222, a lower nut 223, a lower friction pad ring 224, a lower fixing nut 225, and a lower fixing bolt 226. The upper bearing plate 211 and the lower bearing plate 221 are two rectangular plate-shaped components of the same size and a certain thickness, and their length and width are both greater than the radius of the negative Poisson's ratio cylinder 11. R The upper bearing plate 211 is located above the negative Poisson's ratio cylinder 11, and the lower bearing plate 221 is located below the negative Poisson's ratio cylinder 11. They are arranged symmetrically, and each has bolt holes on its four sides. Upper bolts 212 are located at the four corners of the upper wall of the upper bearing plate 211, with at least one bolt at each corner. The upper bolts 212 penetrate the upper bearing plate 211 and cooperate with the upper nuts 213 located on the lower wall of the upper bearing plate 211, fixing them at the four corners of the upper bearing plate 211. Lower bolts 222 are located at the four corners of the lower wall of the lower bearing plate 221, with at least one bolt at each corner. The lower bolts 222 penetrate the lower bearing plate 221 and cooperate with the lower nuts 223 located on the upper wall of the lower bearing plate 221, fixing them at the four corners of the lower bearing plate 221, serving as basic support components. The upper friction pad ring 214 has a radius larger than that of the negative Poisson's ratio cylinder. RHowever, the "cup-shaped" component, smaller than the length and width of the upper and lower support plates, consists of a circular plate and a ring of the same radius. The lower friction pad ring 224 is a component with the exact same shape as the upper friction pad ring. The upper friction pad ring 214 is located between the lower wall of the upper support plate 211 and the upper wall of the high-damping inner core 12, while the lower friction pad ring 224 is located between the upper wall of the lower support plate 221 and the lower wall of the high-damping inner core 12. These components protect the core and provide frictional resistance. The upper fixing bolt 216 passes sequentially from top to bottom through the upper support plate 211, the upper friction pad ring 214, and the upper wall of the negative Poisson's ratio cylinder 11, and cooperates with the upper fixing nut 215 to fix the upper support plate 211 and the upper friction pad ring 214 to the upper wall of the negative Poisson's ratio cylinder 11. The lower fixing bolt 226 passes through the lower bearing plate 221, the lower friction pad ring 224, and the lower wall of the negative Poisson's ratio cylinder 11 from bottom to top, and cooperates with the lower fixing nut 225 to fix the lower bearing plate 221 and the lower friction pad ring 224 to the lower wall of the negative Poisson's ratio cylinder 11. The circular plate side of the upper friction pad ring 214 is in close contact with the lower wall of the upper bearing plate 211, and the circular plate side of the lower friction pad ring 224 is in close contact with the upper wall of the lower bearing plate 221. The circular sides of the upper and lower friction pad rings 214 and 224 can cover the negative Poisson's ratio cylinder 11. When the negative Poisson's ratio cylinder 11 deforms, the circular ring can contact the cylinder body, limiting the cylinder deformation and enhancing energy dissipation. The upper bearing assembly 21 is mainly used to transmit the vibration from the upper part to the damper, while the lower bearing assembly 22 is mainly used to provide support for the entire damper, bearing the vibration from the upper part and effectively dispersing stress. The load-bearing component 2 is bolted, which allows for quick installation and disassembly, facilitating on-site equipment, routine maintenance, and post-earthquake repairs.

[0028] like Figure 2 As shown, in this embodiment, the limiting component 3 includes a limiting plate 31, a bolt 32 on the upper limiting plate, and a bolt 33 on the lower limiting plate. The length of the limiting plate 31 is greater than the height of the negative Poisson's ratio cylinder. HThe upper and lower load-bearing plate 211 is formed by an inward-curving cut in the middle, creating a waisted plate-like component that is wider at the top and bottom and narrower in the middle. Bolt holes are pre-drilled at both ends. The bolt holes on the upper side of the limiting plate 31 are oblong, while the bolt holes on the lower side are circular. Bolts 32 on the upper limiting plate, through the bolt holes in the limiting plate and the pre-drilled bolt holes in the upper load-bearing plate 211, fix the limiting plate 31 to the four sides of the upper load-bearing plate 211. Similarly, bolts 33 on the lower limiting plate, through the bolt holes in the limiting plate and the pre-drilled bolt holes in the lower load-bearing plate 221, fix the limiting plate 31 to the four sides of the lower load-bearing plate 221. The limiting assembly 3 connects the upper load-bearing assembly 21, the dual-control energy dissipation assembly 1, and the lower load-bearing assembly 22 into a single unit, forming a continuous force-bearing system and preventing the risk of local instability or separation of the vibration dual-control damper under large displacements. The upper part of the limiting plate 31 is designed with an elongated hole, which allows for a certain amount of slight displacement and relative slippage under seismic or wind-induced vibration, preventing premature stress concentration due to rigid constraints. The lower part of the limiting plate 31 is a circular hole, forming a rigid limit. When the displacement exceeds the design value, it acts as a forced constraint, ensuring that the damper does not undergo uncontrolled deformation. The arc-shaped surface cut off in the middle forms a local weakening zone. When the limiting plate 31 is subjected to alternating tension and compression, the arc-shaped area is the first to yield or undergo local plastic deformation, thereby dissipating energy. This plate, together with the vibration and shock control component 1, forms a multi-stage energy dissipation mechanism, improving the overall energy dissipation capacity of the damper. Especially under multiple cyclic loading, it can effectively disperse stress and prevent premature failure of a single component.

[0029] like Figure 2 As shown, in this embodiment, the protective cover 4 is a hollow cylindrical component with a radius slightly larger than the friction pad ring radius, but smaller than the length and width of the upper and lower bearing plates, and a height slightly higher than the negative Poisson's ratio cylinder 11. The protective cover 4 completely covers the entire damper cylinder structure area, including the upper and lower friction pad rings, the bolt connection area, the middle negative Poisson's ratio cylinder and high damping core area, and the bottom pressure-bearing connection area; the protective cover 4 consists of the following layers from the outside to the inside: an outer flame-retardant and heat-insulating layer: made of high-performance composite materials (such as fluorosilicone rubber coated with glass fiber fabric), which has high temperature resistance, flame retardancy and ultraviolet protection capabilities; a middle heat insulation layer: made of polyurethane foam, aerogel or closed-cell foam material, which effectively isolates the influence of external temperature fluctuations on the performance of the rubber core; an inner reinforced bonding layer: bonded to the outer wall of the metal cylinder or a square reinforced shell by high elastic sealant or structural adhesive to ensure long-term service stability; and an auxiliary wear-resistant inner lining layer (optional): if used in a dusty or frequently vibrating environment, an additional wear-resistant polymer inner lining can be added to improve service life. The overall enclosure is made by flexible molding or multi-piece splicing, which facilitates post-earthquake inspection or replacement of internal core units and is conducive to on-site installation and subsequent maintenance.

[0030] Based on the actual situation of this embodiment, Embodiment 1 is mainly applicable to large and medium-sized building structures. When the device of this application is applied in practice, the upper bearing component 21 bears the vibration of the upper part of the structure and transmits the force to the entire damper, while the lower bearing component 22 receives the vibration input from the upper part and effectively disperses the force transmission. This damper maintains structural stability and improves vibration reduction effect, while also solving the toxicity and environmental problems of traditional lead-core dampers through the use of environmentally friendly materials and innovative design. Through the synergistic effect of the negative Poisson's ratio cylinder 11 and the high-damping inner core 12 with its high-efficiency core material, the damper can effectively absorb energy under seismic action, reduce structural deformation, and improve the dual control effect of vibration and seismic activity in buildings.

[0031] Example 2: like Figure 6 As shown, in this embodiment, the negative Poisson's ratio vibration dual-control damper uses a double-layer negative Poisson's ratio cylinder 11. Compared to the single-layer vibration dual-control damper in Embodiment 1, the difference lies in the fact that in this embodiment, the negative Poisson's ratio cylinder is changed from a single layer to two layers, while the upper and lower load-bearing components remain unchanged. The limiting plate correspondingly increases in length with the size of the negative Poisson's ratio cylinder 11. The upper and lower negative Poisson's ratio cylinders 11 are fixedly connected by an annular connector, and the internal high-damping core 12 uses a laminated rubber-steel sheet core. Compared to a single-layer structure, the double-layer structure can further enhance the progressive yielding and multi-stage energy dissipation characteristics, optimizing energy absorption efficiency. The double-layer negative Poisson's ratio vibration dual-control damper is more suitable for high-rise buildings or bridges, which have high seismic resistance requirements.

[0032] Example 3: like Figure 7 As shown, in this embodiment, the negative Poisson's ratio cylindrical units are no longer connected by on-site welding using bent ribs, but instead are connected in series using annular integral connectors. This method maintains uniform overall stress distribution while reducing on-site welding procedures, which is beneficial for assembly-based construction and standardized production, further improving manufacturing and assembly efficiency.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Terms such as "upper," "lower," "left," "right," "front," and "rear" used in the invention are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0034] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A negative Poisson's ratio vibration dual-controlled damper, characterized in that: comprising a dual-control energy dissipation assembly, a load-bearing assembly, a limiting assembly and a protective cover, wherein the dual-control energy dissipation assembly is located in the middle of the load-bearing assembly, the limiting assembly is fixed on the outer side surface of the load-bearing assembly to fix the load-bearing assembly and the dual-control energy dissipation assembly, and the protective cover is arranged on the outer side of the dual-control energy dissipation assembly and placed in the middle of the load-bearing assembly; the load-bearing assembly comprises an upper load-bearing plate and a lower load-bearing plate, both of which are metal rectangular plate-shaped members with a certain thickness, the dual-control energy dissipation assembly comprises a negative Poisson's ratio cylinder and a high-damping inner core; the negative Poisson's ratio cylinder is a curved cylindrical structure formed by combining a plurality of negative Poisson's ratio cylindrical units made of negative Poisson's ratio materials, the high-damping inner core is a cylindrical core member formed by stacking a plurality of high-damping core units or integrally formed, the stacked layers are connected by bonding, the high-damping inner core is located inside the negative Poisson's ratio cylinder, and an annular gap exists between the high-damping inner core and the negative Poisson's ratio cylinder, and the limiting assembly comprises four limiting plates with a length longer than that of the middle energy dissipating body.

2. The negative Poisson's ratio vibration dual-controlled damper according to claim 1, characterized in that, The negative Poisson's ratio cylindrical unit is a curved member with a bent rib in the middle and a shape similar to the Chinese character "ya", and the number of the negative Poisson's ratio cylindrical units is no less than four.

3. A negative Poisson's ratio vibration dual-control damper according to claim 2, characterized in that, The negative Poisson's ratio cylinder is connected into a cylinder by on-site welding through the bent ribs, or is connected in series into a cylinder by adopting an annular integral connecting member.

4. A negative Poisson's ratio vibration dual-control damper according to claim 2, characterized in that, The negative Poisson's ratio cylinder is a single layer or multiple layers, and the connection between each layer of the cylinder body is fixed by an annular connecting member or a supporting structure.

5. A negative Poisson's ratio vibration dual-control damper according to claim 1, characterized in that, The high-damping inner core is made of a material with energy dissipation characteristics.

6. A negative Poisson's ratio vibration dual-control damper according to claim 5, characterized in that, The height of the high-damping inner core is greater than the height of the negative Poisson's ratio cylinder.

7. A negative Poisson's ratio vibration dual-control damper according to claim 1, characterized in that, The protective cover is a cylindrical hollow cover, and the protective cover sequentially comprises an inner reinforced bonding layer, a middle heat preservation layer and an outer flame-retardant heat insulation layer from the inside to the outside, and all the protective layers are closely adhered to each other.

8. A negative Poisson's ratio vibration dual-control damper according to claim 1, characterized in that, The load-bearing assembly comprises an upper load-bearing assembly and a lower load-bearing assembly; the upper load-bearing assembly comprises an upper bolt, an upper nut, an upper load-bearing plate, an upper friction lining ring, an upper fixing bolt and an upper fixing nut; the lower load-bearing assembly comprises a lower bolt, a lower nut, a lower load-bearing plate, a lower friction lining ring, a lower fixing bolt and a lower fixing nut; the upper bolt and the upper nut are matched and fixed on the upper wall surface at the edge of the upper load-bearing plate, and the upper fixing bolt and the upper fixing nut are matched to penetrate through the upper load-bearing plate, the upper friction lining ring and the negative Poisson's ratio cylinder from top to bottom for fixation; the lower bolt and the lower nut are matched and fixed on the lower wall surface at the edge of the lower load-bearing plate, and the lower fixing bolt and the lower fixing nut are matched to penetrate through the lower load-bearing plate, the lower friction lining ring and the negative Poisson's ratio cylinder from bottom to top for fixation.

9. A negative Poisson's ratio vibration dual-control damper according to claim 8, characterized in that, The upper friction lining ring and the lower friction lining ring are of a "cup cover type", the upper friction lining ring is located between the high-damping inner core and the upper load-bearing plate, and the lower friction lining ring is located between the high-damping inner core and the lower load-bearing plate.

10. A negative Poisson's ratio vibration dual-control damper according to claim 1, characterized in that, The limiting assembly comprises a limiting plate, an upper limiting plate bolt and a lower limiting plate bolt; the reserved screw hole at the upper part of the limiting plate is a long round hole, the reserved screw hole at the lower part of the limiting plate is a round hole, and the middle part of the limiting plate adopts an arc design; the upper and lower ends of the limiting plate are respectively fixed on the side surfaces of the upper load-bearing plate and the lower load-bearing plate through the upper limiting plate bolt and the lower limiting plate bolt.

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