Vibration isolation device based on laminated waveform circular ring steel plates and working method of vibration isolation device
Through the combined structure of the laminated corrugated ring steel plate and the laminated rubber support, the buckling characteristics of the corrugated ring steel plate provide negative stiffness, combined with the rigidity of the laminated rubber support, the existing vibration isolation device has solved the problems of high boundary conditions and complex system requirements, and achieved the effect of high vertical stiffness and low-frequency vibration isolation.
Patent Information
- Application Number
- CN202510783528.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-08-15
AI Technical Summary
While the existing civil engineering structure vibration isolation devices have high vertical stiffness and low frequency vibration isolation capabilities, they also have high requirements for boundary conditions, the system is complex and has poor robustness, which is difficult to meet engineering needs and is difficult to maintain.
The combined structure of laminated corrugated ring steel plate and laminated rubber support is adopted to provide negative stiffness through the buckling characteristics of laminated corrugated ring steel plate. Combined with the rigidity of laminated rubber support, a quasi-zero rigidity vibration isolation effect is formed, and the special design of the corrugated ring steel plate is used to achieve parameterized control.
High vertical stiffness and low-frequency vibration isolation capabilities with simple structure, low economic cost and easy maintenance are achieved, low-frequency vibration isolation can be achieved under high static stiffness, and the deformation amplitude of the vibration isolation device is controlled through parameterized design.
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Figure CN120486606A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of building structure vibration isolation, and in particular relates to a vibration isolation device based on laminated corrugated circular steel plates and a working method thereof. Background Art
[0002] In the field of earthquake prevention and disaster reduction in civil engineering, vibration isolation devices are widely used as a mature and efficient technical means. They reduce the seismic response of the structure by extending the structural period, thereby protecting the building from damage.
[0003] Vibration isolation technology essentially achieves good low-frequency vibration isolation performance without sacrificing load-bearing capacity by connecting positive and negative stiffness elements in parallel. However, existing vertical bearing components have the following problems: the vertical stiffness of rubber bearings is significantly affected by compressive stress, and increasing the thickness of the rubber layer makes it difficult to achieve low-frequency vibration isolation. The bearing capacity of coil springs is too low. The vertical stiffness of disc springs is greatly affected by friction, and it is difficult to achieve a higher bearing capacity and lower vertical stiffness. Although hydraulic cylinders and air springs have lower vertical stiffness, the system is complex and the maintenance cost is high. Magnetic negative stiffness is not suitable for building structures due to its low bearing capacity. Prestressed springs are subject to assembly errors and contact friction. Buckled beams require rigid boundary conditions and are extremely sensitive to boundary displacements. 3D printing is the most ideal processing method, but 3D-printed components are generally small and have low bearing capacity, and are currently not applicable to heavy building structures. Summary of the Invention
[0004] The present invention provides a vibration isolation device based on laminated corrugated circular steel plates, which is used to solve the problems that existing civil engineering structure vibration isolation devices have high vertical stiffness and low-frequency vibration isolation capabilities, but have high requirements on boundary conditions and other factors, or the negative stiffness value does not meet the engineering requirements, and the system is complex, has poor robustness and is difficult to maintain.
[0005] The invention provides a working method of a vibration isolation device based on laminated corrugated circular steel plates, which is used to achieve building vibration isolation.
[0006] The present invention is achieved through the following technical solutions: A vibration isolation device based on laminated corrugated circular steel plates, comprising a load-bearing top circular steel plate 1, a load-bearing top hollow cylinder 2, a laminated corrugated circular steel plate 3, a guide cylinder 4, a laminated rubber bearing upper plate 5, a laminated rubber bearing 6, and a laminated rubber bearing lower plate 7; A hollow cylinder 2 for a load-bearing top plate is provided at the center of the lower end of the circular steel plate 1 of the load-bearing top plate. The hollow cylinder 2 for a load-bearing top plate is inserted into the laminated corrugated circular steel plate 3. A guide cylinder 4 is also inserted into the laminated corrugated circular steel plate 3. The guide cylinder 4 is inserted into the hollow cylinder 2 for a load-bearing top plate. The bottom of the guide cylinder 4 is provided at the center of the upper end of the laminated rubber bearing upper plate 5. A laminated rubber bearing 6 is provided between the laminated rubber bearing upper plate 5 and the laminated rubber bearing lower plate 7.
[0007] Furthermore, the laminated corrugated circular steel plate 3 is a curved circular steel plate 31 , a curved straight circular steel plate 32 , or a circular steel plate 33 with incomplete interlayer bonding.
[0008] Furthermore, the curved circular steel plate 31 is a periodic waveform curve along the annular direction.
[0009] Furthermore, the curved and straight circular steel plate 32 is a periodic wave curve alternately connected with a straight line along the circumferential direction.
[0010] Furthermore, the interlayer incompletely bonded circular steel plates 33 are tightly bonded at the wave crests and troughs but have gaps at the wave antinodes.
[0011] Furthermore, the number of waves of the laminated corrugated circular ring steel plate 3 is an even number.
[0012] Furthermore, the radial width of the laminated corrugated circular steel plate 3 is greater than 1 / 4 of the circular radius of the laminated corrugated circular steel plate 3 .
[0013] A method for operating a vibration isolation device based on laminated corrugated circular steel plates, wherein the method uses the vibration isolation device based on laminated corrugated circular steel plates as described above, and the method comprises: Assemble the vibration isolation device; When the structure is subjected to earthquake action, the horizontal load is transferred to the laminated rubber bearing 6 through the guide cylinder 4, and the shear resistance of the rubber bearing 6 is used to achieve vibration isolation; Or the vertical load acts directly on the laminated corrugated circular steel plate 3 along the top plate 1, and then is transferred to the laminated rubber bearing 6 by the laminated corrugated circular steel plate 3, and the shear resistance of the rubber bearing 6 is used to achieve vibration isolation.
[0014] Furthermore, the laminated corrugated circular steel plate 3 and the laminated rubber bearing 6 work in series; the laminated corrugated circular steel plate 3 and the laminated rubber bearing 6 work in series.
[0015] Furthermore, in the initial equilibrium state, the dynamic stiffness of the laminated corrugated ring steel plate 3 is in the negative range, and the steel plate is in a high load state; When affected by vertical seismic motion, the deformation amplitude of the laminated corrugated circular steel plate 3 is within the range of negative dynamic stiffness. At this time, the positive stiffness and negative stiffness generated by the laminated rubber bearing 6 connected in series with it work together to achieve the effect of "quasi-zero stiffness" and reduce the natural vibration period.
[0016] The beneficial effects of the present invention are: 1. The combined three-dimensional vibration isolation device based on laminated corrugated circular steel plates provided by the present invention comprises the laminated rubber bearing, guide cylinder, laminated corrugated circular steel plates, and load-bearing top plate, all of which are symmetrical and have a relatively simple spatial shape. The laminated corrugated circular steel plates are sleeved on the guide cylinder, and the guide cylinder is integrated with the top plate of the laminated rubber bearing. This results in a simple overall structure and low economic cost, making it easy to replace and maintain later.
[0017] 2. When the laminated corrugated circular steel plates of the present invention are in operation, the laminated rubber bearings and the laminated corrugated circular steel plates provide vertical positive stiffness and vertical dynamic negative stiffness, respectively. The former is a mature and efficient vibration isolation component that has been widely used in the engineering field and can stably provide linear positive stiffness; while the latter is based on the principle of elastic system stability and can provide linear negative stiffness after special design of the waveform. That is, the quasi-zero stiffness of the device is linear and controllable, which can enable the building structure installed with this device to implement precise frequency domain vibration isolation. For the laminated rubber bearings, the rubber thickness and steel plate thickness can be adjusted to obtain the required vertical and lateral stiffness. For the annular steel plates, the negative stiffness value can also be affected by adjusting the waveform or the number of layers, thus realizing the parameterization of the device.
[0018] 3. The corrugated circular ring steel plate of the present invention is given a specific thickness, span height, outer diameter and inner diameter through optimized design, and can enter the negative stiffness section at a specified deformation threshold. This feature can achieve precise control of the deformation amplitude of the vibration isolation device.
[0019] 4. The present invention uses optimization means to specially design the cross-sectional profile of the annular steel plate, that is, the wave profile, which can reduce the internal stress of the steel plate during operation and increase the durability of the device.
[0020] 5. The device of the present invention has a simple structure and is easy to manufacture and install, and is suitable for vibration isolation of building structures. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0022] Figure 2 It is an exploded view of the present invention.
[0023] Figure 3 It is a schematic diagram of the curved circular ring steel plate of the present invention.
[0024] Figure 4It is a schematic diagram of the curved straight line circular ring steel plate of the present invention.
[0025] Figure 5 It is a schematic diagram of the interlayer incompletely bonded circular steel plates of the present invention.
[0026] Figure 6 It is a curve schematic diagram of the present invention.
[0027] Figure 7 It is a curved straight line schematic diagram of the present invention.
[0028] Figure 8 It is a schematic diagram of the curved stacking of the present invention.
[0029] Figure 9 It is a schematic diagram of the incompletely fitted curved stacking of the present invention.
[0030] Figure 10 It is a schematic diagram of the third-order buckling mode of the steel plate after buckling of the present invention.
[0031] 1- circular steel plate of the load-bearing top plate; 2- hollow cylinder of the load-bearing top plate; 3- laminated corrugated circular steel plate; 4- guide cylinder; 5- laminated rubber bearing upper plate; 6- laminated rubber bearing; 7- laminated rubber bearing lower plate; 31- curved circular steel plate; 32- curved straight circular steel plate; 33- circular steel plate with incomplete fit between layers. DETAILED DESCRIPTION
[0032] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.
[0033] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.
[0034] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.
[0035] The following is a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the specification of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0037] Implementation Method 1 This embodiment provides a vibration isolation device based on laminated corrugated ring steel plates, such as Figure 1-2 As shown, the laminated rubber bearing is arranged at the lower part of the overall device; the guide cylinder is a hollow cylinder, which is arranged above the laminated rubber bearing and is an integral part of the upper top plate of the rubber bearing; the corrugated circular steel plate is a laminated corrugated circular steel plate formed by arranging the specially designed corrugated shape around the center of the circle in a 360-degree circumference and then overlapping in multiple layers; the load-bearing top plate is composed of a circular steel plate and a hollow sleeve. The above-mentioned laminated rubber bearing, guide cylinder, laminated corrugated circular steel plate and load-bearing top plate constitute a quasi-zero stiffness vibration isolation device. The vertical load is applied to the load-bearing top plate and is directly transmitted to the laminated corrugated circular steel plate and the lower laminated rubber bearing through the circular plate, while the horizontal shear force is transmitted to the lower laminated rubber bearing through the contact between the load-bearing top plate cylinder and the guide cylinder, so as to achieve the expected three-dimensional vibration isolation.
[0038] The vibration isolation device includes a load-bearing top circular steel plate 1, a load-bearing top hollow cylinder 2, a laminated corrugated ring steel plate 3, a guide cylinder 4, a laminated rubber bearing upper top plate 5, a laminated rubber bearing 6 and a laminated rubber bearing lower top plate 7; A hollow cylinder 2 for a load-bearing top plate is provided at the center of the lower end of the circular steel plate 1 of the load-bearing top plate. The hollow cylinder 2 for a load-bearing top plate is inserted into the laminated corrugated circular steel plate 3. A guide cylinder 4 is also inserted into the laminated corrugated circular steel plate 3. The guide cylinder 4 is inserted into the hollow cylinder 2 for a load-bearing top plate. The bottom of the guide cylinder 4 is provided at the center of the upper end of the laminated rubber bearing upper plate 5. A laminated rubber bearing 6 is provided between the laminated rubber bearing upper plate 5 and the laminated rubber bearing lower plate 7.
[0039] Further, such as Figure 3-5 As shown, the laminated corrugated circular steel plate 3 is a curved circular steel plate 31 , a curved straight circular steel plate 32 , or a circular steel plate 33 with incomplete interlayer bonding.
[0040] Further, such as Figure 3 and Figure 6 As shown, the curved circular steel plate 31 is a periodic waveform curve along the circumferential direction. When subjected to vertical load, vertical vibration isolation is achieved by utilizing the negative stiffness mechanical properties of the wavy circular steel plate after buckling.
[0041] Further, such as Figure 4 and Figure 7 As shown, the curved and straight circular steel plate 32 is a periodic wave curve alternately connected with a straight line along the circumferential direction. When subjected to vertical load, the negative stiffness mechanical property of the corrugated circular steel plate after buckling is utilized to achieve vertical vibration isolation.
[0042] Further, such as Figure 5 and Figure 8 As shown, the interlayer incompletely bonded circular steel plates 33 fit tightly at the crests and troughs of the wave pattern, but leave gaps at the antinodes. This differs from the tight fit between conventional steel plates. When subjected to vertical loads, the gaps reduce the interlayer friction generated by contact when the steel plates buckle, thereby achieving vertical vibration isolation by leveraging the negative stiffness mechanical properties of the corrugated circular steel plates after buckling.
[0043] Furthermore, the number of waves of the laminated corrugated circular ring steel plate 3 is an even number.
[0044] After the laminated corrugated ring steel plate 3 is subjected to load buckling, the third-order symmetrical buckling mode is generated by the curve waveform. Figure 10 As shown, the negative stiffness provided by the characteristic realizes vertical vibration isolation.
[0045] Furthermore, the radial width of the laminated corrugated circular steel plate 3 is greater than 1 / 4 of the circular radius of the laminated corrugated circular steel plate 3. If the radial width is too small, the stability will be poor.
[0046] Furthermore, the guide cylinder and the laminated rubber bearing top plate are integrally formed and located in the middle of the device, and the outer diameter circle, inner diameter circle and circular contour of the laminated rubber bearing top plate are concentric.
[0047] Furthermore, the laminated corrugated annular steel plate is sleeved on the guide cylinder, with the lower surface in contact with the upper plate of the laminated rubber bearing and the upper surface in direct contact with the lower surface of the circular steel plate of the loaded top plate.
[0048] Furthermore, the load-bearing top plate is arranged at the top of the entire device in the device, and is placed under the building structure when in use to directly bear the load. The connecting cylinder of the load-bearing top plate is inserted into the gap between the guide cylinder and the corrugated circular ring steel plate.
[0049] Implementation Method 2 This embodiment provides a method for operating a vibration isolation device based on laminated corrugated circular steel plates. The method uses the vibration isolation device based on laminated corrugated circular steel plates as described in the first embodiment. The method is as follows: Assemble the vibration isolation device; When the structure is subjected to earthquake action, the horizontal load is transferred to the laminated rubber bearing 6 through the guide cylinder 4, and the shear resistance of the rubber bearing 6 is used to achieve vibration isolation; Or the vertical load acts directly on the laminated corrugated circular steel plate 3 along the top plate 1, and then is transferred to the laminated rubber bearing 6 by the laminated corrugated circular steel plate 3, and the shear resistance of the rubber bearing 6 is used to achieve vibration isolation.
[0050] Furthermore, the laminated corrugated circular steel plate 3 and the laminated rubber bearing 6 work in series; the laminated corrugated circular steel plate 3 and the laminated rubber bearing 6 work in series.
[0051] Furthermore, in the initial equilibrium state, the dynamic stiffness of the laminated corrugated ring steel plate 3 is in the negative range, and in order to meet the high static stiffness, the steel plate is in a high load state; When subjected to vertical seismic motion, the deformation amplitude of the laminated corrugated circular steel plate 3 remains within the negative dynamic stiffness range, maintaining a negative dynamic stiffness. The positive and negative stiffnesses generated by the laminated rubber bearing 6 in series with it then work together to achieve a "quasi-zero stiffness" effect, reducing the natural vibration period. This allows the device to achieve both high static stiffness and low-frequency vibration isolation capabilities.
[0052] A specific example of a special curve function in which the curved circular steel plate 31 is a periodic waveform curve along the annular direction:
[0053] in, is the vertical coordinate, is the circumferential horizontal coordinate.
Claims
1. A vibration isolation device based on laminated corrugated circular steel plates, characterized in that: The vibration isolation device comprises a load-bearing top circular steel plate (1), a load-bearing top hollow cylinder (2), a laminated corrugated circular steel plate (3), a guide cylinder (4), a laminated rubber bearing upper top plate (5), a laminated rubber bearing (6), and a laminated rubber bearing lower top plate (7); A load-bearing top plate hollow cylinder (2) is provided at the center of the lower end of the load-bearing top plate circular steel plate (1), the load-bearing top plate hollow cylinder (2) is inserted into the laminated corrugated circular steel plate (3), a guide cylinder (4) is further inserted into the laminated corrugated circular steel plate (3), the guide cylinder (4) is inserted into the load-bearing top plate hollow cylinder (2), the bottom of the guide cylinder (4) is provided at the center of the upper end of the laminated rubber bearing upper plate (5), and a laminated rubber bearing (6) is provided between the laminated rubber bearing upper plate (5) and the laminated rubber bearing lower plate (7).
2. The vibration isolation device according to claim 1, characterized in that: The laminated corrugated circular steel plates (3) are curved circular steel plates (31), curved straight circular steel plates (32), or circular steel plates (33) with incomplete interlayer contact.
3. The vibration isolation device according to claim 2, characterized in that: The curved circular steel plate (31) is a periodic waveform curve along the annular direction.
4. The vibration isolation device according to claim 2, characterized in that: The curved and straight circular steel plate (32) is a periodic wave-shaped curve alternately connected with a straight line along the annular direction.
5. The vibration isolation device according to claim 2, characterized in that: The interlayer incompletely fitted circular steel plates (33) are tightly fitted at the wave crests and troughs but have gaps at the wave antinodes.
6. The vibration isolation device according to claim 2, characterized in that: The number of waves of the laminated corrugated circular ring steel plate (3) is an even number.
7. The vibration isolation device according to claim 1, characterized in that: The radial width of the laminated corrugated circular steel plate (3) is greater than 1 / 4 of the circular ring radius of the laminated corrugated circular steel plate (3).
8. A method for operating a vibration isolation device based on laminated corrugated circular steel plates, characterized in that: The working method uses the vibration isolation device based on laminated corrugated circular steel plates as described in any one of claims 1 to 7, and the working method is: Assemble the vibration isolation device; When the structure is subjected to an earthquake, the horizontal load is transferred to the laminated rubber bearing (6) through the guide cylinder (4), and the shear resistance of the rubber bearing (6) is utilized to achieve vibration isolation; Alternatively, the vertical load acts directly on the laminated corrugated circular steel plate (3) along the top plate (1), and is then transferred from the laminated corrugated circular steel plate (3) to the laminated rubber bearing (6), thereby utilizing the shearing resistance of the rubber bearing (6) to achieve vibration isolation.
9. The working method according to claim 8, characterized in that: The laminated corrugated circular steel plate (3) and the laminated rubber bearing (6) work in series; the laminated corrugated circular steel plate (3) and the laminated rubber bearing (6) work in series.
10. The working method according to claim 8, characterized in that: In the initial equilibrium state, the dynamic stiffness of the laminated corrugated ring steel plate (3) is in a negative range, and the steel plate is in a high load state; When affected by vertical earthquake motion, the deformation amplitude of the laminated corrugated circular steel plate (3) is within the range of negative dynamic stiffness. At this time, the positive stiffness and negative stiffness generated by the laminated rubber bearing (6) connected in series with it work together to achieve a "quasi-zero stiffness" effect, thereby reducing the natural vibration period.