Replaceable adjustable vibration double-control support, working method and adjusting method thereof

Abstract

The application relates to a replaceable and adjustable vibration and shock double-control support and a working method and an adjusting method thereof, which comprises an isolation support and a vibration isolation support, the isolation support is a laminated rubber isolation support, the vibration isolation support comprises a piston seat, a vertical built-in pressing block and a liquid storage cavity for bearing liquid are arranged in the piston seat, a piston cavity and a piston plate are arranged along the radial direction of the liquid storage cavity, one end surface of the piston plate is fixedly connected with a support rod, the support rod extends out of the piston seat and is connected with a top plate of the laminated rubber support, vertical vibration is converted into horizontal vibration by the bearing liquid and is transmitted to the laminated rubber support, and vertical vibration isolation is realized. The pressing block is fixed below a bottom plate of the isolation support, the upper end surface of the piston seat is locked and fixed with the bottom plate of the isolation support through a bolt, elastic sealing pads are arranged between the upper end surface of the piston seat and the bottom plate and between the upper end surface of the bottom plate and the bolt head of the bolt, and when the volume of the bearing liquid is changed, the height of the support is adjusted. The above structure realizes high bearing capacity and better vibration and shock double-control function.

Description

Technical Field

[0001] This invention relates to the field of building vibration damping bearings, specifically a replaceable and adjustable vibration-controlled bearing, its working method, and its adjustment method. Background Technology

[0002] Developing residential, office, and school properties above subway depot slabs can efficiently utilize urban land resources and fully leverage the convenience of subway access. However, with increasing seismic activity, the safety threat posed by earthquakes to these properties cannot be ignored. Therefore, it is necessary to apply "vibration-seismic dual-control bearings" to design vibration isolation and seismic isolation schemes for subway-adjacent properties.

[0003] Both subway environmental vibrations and ground motions can be characterized as triaxial vibrations along the horizontal X-axis, horizontal Y-axis, and vertical Z-axis. However, the dominant frequency of subway environmental vibrations is 20–100 Hz, with vertical vibrations having the greatest impact on buildings, while the impact of horizontal vibrations is usually negligible. Ground motions have frequencies of 0.1–10 Hz, with horizontal vibrations having the greatest impact on buildings, while vertical vibrations only require attention in a few cases. In addition, the construction site may also contain other low-frequency environmental vibration disturbances (such as road vehicle vibrations), whose frequencies are usually between 4–20 Hz. Although the amplitude is small, these vibrations may resonate with vertically isolated buildings, causing secondary negative impacts.

[0004] Current dual-control vibration isolation bearings typically involve simply superimposing traditional lead-core rubber bearings with steel springs or air springs. The steel springs or air springs isolate vertical seismic vibrations, while the lead-core rubber bearings isolate horizontal seismic vibrations. Alternatively, the thickness of the rubber layer in the lead-core rubber isolation bearing can be increased to provide both vertical and horizontal vibration isolation. However, both of these methods have drawbacks.

[0005] The drawbacks of using superimposed steel springs and air springs are twofold: firstly, their compressive bearing capacity is low, failing to meet the vertical bearing requirements of medium and large-scale buildings; secondly, the steel springs and air springs significantly increase the height of the supports, reducing their stability; thirdly, the vertical vibration isolation components of these supports are extremely difficult to replace, thus preventing flexible adjustment and optimization of vertical vibration isolation design parameters according to actual needs; and finally, the vertical settlement deformation of these supports cannot be flexibly adjusted and controlled, and even slight, accidental design errors can cause severe tilting of the superstructure.

[0006] The drawbacks of increasing the thickness of the rubber layer in bearings are twofold. First, increasing the thickness of the rubber layer significantly reduces the stability and ultimate shear deformation capacity of the bearing, thereby significantly reducing its horizontal seismic isolation performance. Second, since both vertical and horizontal seismic isolation functions are performed by the rubber layer, vertical isolation components cannot be replaced separately according to actual needs, nor can vertical seismic isolation design parameters be flexibly adjusted and optimized. Finally, the vertical settlement deformation of this type of bearing cannot be flexibly adjusted and controlled, and even slight accidental design errors may cause severe tilting of the superstructure.

[0007] For supports with superimposed steel springs and air springs, as well as supports with increased rubber layer thickness, various environmental vibrations are usually small-amplitude vibrations. Under low-frequency environmental vibration interference (such as road vehicle environmental vibration), they will resonate with the vibration isolation structure. However, their vertical damping performance is difficult to achieve (because the above supports usually use velocity or displacement dampers, which require a large velocity or displacement to excite damping energy dissipation), and cannot effectively suppress resonance peaks, which will again have a negative impact on the normal use of the building.

[0008] Therefore, improvements need to be made to existing building seismic isolation bearings. Summary of the Invention

[0009] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a replaceable and adjustable vibration-controlled bearing, its working method, and its adjustment method, thereby solving the technical problems of existing bearings that are difficult to use simultaneously for vertical and horizontal vibration isolation when bearing capacity is large, and whose vibration isolation performance and bearing height are not easily adjustable, leading to inconvenience in use or serious tilting of the building above. This objective is achieved through the following technical solution.

[0010] A replaceable and adjustable vibration-controlled bearing includes a seismic isolation bearing and a vibration damping bearing. The seismic isolation bearing is a horizontally vibration-damping laminated rubber bearing. The vibration damping bearing comprises a pressure block, a piston seat, a piston plate, a support rod, and a horizontally vibration-damping laminated rubber bearing. The piston seat has a vertically positioned liquid storage chamber and a radially positioned piston cavity relative to the vertical liquid storage chamber. The liquid storage chamber contains pressurized liquid, and the pressure block is vertically slidably sealed within the liquid storage chamber. The piston plate is slidably sealed within the piston cavity. One end face of the piston plate is fixedly connected to the support rod, which horizontally extends out of the piston seat along the piston cavity and connects to the pressure block. The top plate of the laminated rubber bearing, the laminated rubber bearing, and the piston seat are all fixed in the same supporting plane. The pressure block is fixed below the bottom plate of the seismic isolation bearing. The upper end face of the piston seat is locked to the bottom plate of the seismic isolation bearing by bolts. Elastic sealing gaskets that deform along the height direction of the double-control bearing are provided between the upper end face of the piston seat and the bottom plate, and between the upper end face of the bottom plate and the bolt head. Under the downward pressure of the seismic isolation bearing, the pressure block squeezes the pressurized liquid. The pressurized liquid converts the vertical force into a radial force on each piston plate. The radial force of the piston plate is transmitted as a horizontal force to the top plate of the laminated rubber bearing. In the above structure, the piston seat is fixedly connected to the lower part of the laminated rubber seismic isolation bearing, so that the vibration below the bottom plate of the piston seat, that is, the horizontal vibration, is transmitted to the laminated rubber seismic isolation bearing. Seismic isolation is achieved by relying on the laminated rubber seismic isolation bearing to isolate the horizontal vibration of the earthquake. The vertical vibration is converted into horizontal vibration by the pressure block, pressurized fluid, piston plate, support rod, and laminated rubber bearing within the piston seat. This horizontal vibration is then transmitted to the top plate of the laminated rubber bearing via the support rod, achieving horizontal vibration isolation and thus vertical vibration isolation. This achieves both horizontal and vertical vibration isolation, providing good dual-control of vibration and meeting high load-bearing capacity requirements. Furthermore, the laminated rubber bearing is externally mounted and can be replaced and adjusted as needed, facilitating adjustments to vibration isolation performance according to vertical isolation requirements and offering wide applicability.

[0011] The bottom of the piston seat is provided with a liquid guide pipe that connects the liquid storage chamber to the outside of the piston seat side, and a valve is provided at the outer end of the liquid guide pipe. Through this structure, the volume of pressurized liquid in the liquid storage chamber can be adjusted by relying on the liquid guide pipe, thereby achieving fine adjustment of the height of the dual-control support, effectively controlling sedimentation, making it convenient to use and applicable to a wide range of situations.

[0012] The liquid storage chamber is equipped with a liquid storage bladder, which seals the pressurized liquid within the bladder. The bladder is connected to the liquid guide tube. This structure ensures effective sealing of the pressurized liquid within the storage chamber, resulting in a more stable and reliable pressurized state and a longer service life.

[0013] The piston seat is provided with at least one piston chamber. This structure allows for the convenient and reasonable selection of the appropriate number of piston chambers in the piston seat as needed, resulting in high adjustability and a wide range of applications.

[0014] The piston seat includes a base, an outer frame, and a top cover. The base, outer frame, and top cover are fixed together when the bolts between the piston seat and the base plate are tightened. A sealing gasket is provided between the outer frame and the top cover. A lower sealing plate is provided at the bottom of the inner cavity formed by the outer frame and the base. A sealing post is provided on the inner circumference of the outer frame. When the sealing gasket, sealing post, and lower sealing plate are fixed together with the base, outer frame, and top cover, they form the liquid storage cavity and the piston cavity. The outer frame has a through hole adapted to the sliding extension of the support rod. This structure serves as a specific implementation of the piston seat, facilitating actual manufacturing and installation. Furthermore, the outer frame and top cover structure provides a limiting function for the base plate of the seismic isolation bearing, effectively preventing excessive settlement deformation of the seismic isolation bearing.

[0015] The outer frame can be rectangular, polygonal, or circular. This structure allows for convenient selection based on specific needs.

[0016] The sealing gasket, sealing column, and lower sealing plate are made of polytetrafluoroethylene (PTFE). The PTFE material has an extremely low coefficient of friction with the piston plate, which hardly hinders the free movement of the piston plate and ensures the sealing effect of the piston seat as a whole, including the liquid storage chamber and the piston chamber. The elastic sealing gasket is made of foam sponge, which ensures the sealing between the vibration isolation support and the piston seat, and has a good buffering effect and height adjustment performance.

[0017] The end of the pressure block that presses down on the pressurized liquid is conical. This structure helps to convert the vertical force of the pressurized liquid into a horizontal force.

[0018] The working method of this vibration-damping dual-control bearing is as follows: the horizontal vibration below the vibration isolation bearing is transmitted to the laminated rubber vibration isolation bearing through the piston seat. The laminated rubber vibration isolation bearing isolates the transmission of the horizontal vibration to the upper building, thus achieving horizontal vibration isolation. The vertical vibration below the vibration isolation bearing is transmitted to the bottom plate of the vibration isolation bearing through the piston seat. The pressure block of the bottom plate is relatively squeezed by the pressurized liquid in the reservoir of the piston seat. The pressurized liquid converts the vertical force into a horizontal force and squeezes the piston plate in the piston cavity. The piston plate transmits the horizontal force to the top plate of the laminated rubber bearing through the support rod. The laminated rubber bearing achieves horizontal vibration isolation, that is, the whole structure achieves vertical vibration isolation.

[0019] The adjustment method of this dual-control vibration isolation bearing includes height adjustment and vibration reduction adjustment. Height adjustment involves injecting pressurized liquid into the storage chamber through the liquid guide pipe, thereby pushing the pressure block to raise the base plate of the vibration isolation bearing relative to the piston seat. Simultaneously, the elastic sealing gasket deforms to adapt to the distance between the base plate and the piston seat, achieving the height adjustment operation. Conversely, pressurized liquid is discharged from the storage chamber through the liquid guide pipe, causing the base plate to lower relative to the piston seat. Simultaneously, the elastic sealing gasket deforms to adapt to the distance between the base plate and the piston seat, achieving the lowering operation. Through these adjustments, fine-tuning of the overall height of the dual-control vibration isolation bearing can be achieved, offsetting uneven settlement caused by accidental design errors. Vibration reduction adjustment involves replacing the laminated rubber bearings with different vibration reduction performance to adjust the horizontal vibration isolation performance, i.e., to adjust the vertical vibration isolation. This structure facilitates the replacement of the laminated rubber bearings, thereby adjusting the vibration reduction performance.

[0020] The beneficial effects of this invention are: strong overall bearing capacity, with both vertical and horizontal vibration isolation functions, better dual vibration control effect, convenient adjustment and installation, wide applicability, suitable for use as a dual vibration control support, or for structural improvement of similar supports. Attached Figure Description

[0021] Figure 1 This is a partial cross-sectional view of the present invention, with section AA shown in the figure.

[0022] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0023] Figure 3 This is a schematic diagram of the transformation structure of the present invention. Figure 1 .

[0024] Figure 4 This is a schematic diagram of the transformation structure of the present invention. Figure 2 .

[0025] Figure 5 This is a schematic diagram of the transformation structure of the present invention. Figure 3 .

[0026] The numbers and names in the diagram are as follows: 1. Laminated rubber seismic isolation bearing, 101. Base plate, 2. Outer frame, 201. Liquid storage chamber, 202. Piston chamber, 3. Sealing gasket plate, 4. Top cover, 5. Elastic sealing gasket, 6. Base, 7. Pressure block, 8. Bolt, 9. Support rod, 10. Piston plate, 11. Lower sealing plate, 12. Pressurized liquid, 13. Liquid guide pipe, 14. Valve, 15. Bolt, 16. Laminated rubber bearing, 17. Sealing column. Detailed Implementation

[0027] The work will now be further described in conjunction with the accompanying drawings.

[0028] like Figure 1 , Figure 2 As shown, the replaceable and adjustable vibration-controlled support includes a seismic isolation support and a vibration isolation bearing. The seismic isolation support is a laminated rubber seismic isolation bearing 1 that isolates horizontal vibrations. The vibration isolation bearing includes a pressure block 7, a piston seat, a piston plate 10, a support rod 9, and a horizontally vibration-isolated laminated rubber bearing 16. The piston seat has a vertical liquid storage chamber 201 and a piston chamber 202 arranged radially relative to the vertical liquid storage chamber. In the figure, there are four piston chambers that are centrally symmetrical with respect to the piston seat. The liquid storage chambers contain pressurized liquid 12, and the liquid storage chambers contain a pressure block that is vertically sliding and sealed. The end of the pressure block that presses down on the pressurized liquid is conical. The piston chambers contain a piston plate that is sliding and sealed. One end face of each piston plate is fixedly connected to a support rod. The support rod slides horizontally out of the piston seat along the piston chamber and is connected to the top plate of the laminated rubber bearing by bolts. The laminated rubber bearing and the piston seat are both fixed in the same support plane. The aforementioned pressure block is fixed below the base plate 101 of the seismic isolation bearing. The upper end face of the piston seat is locked to the base plate of the seismic isolation bearing by bolts 8. Elastic sealing gaskets 5, which deform along the height direction of the double-control bearing, are provided between the upper end face of the piston seat and the base plate, and between the upper end face of the base plate and the bolt head. Under the downward pressure of the seismic isolation bearing, the aforementioned pressure block compresses the pressurized liquid. The pressurized liquid converts the vertical force into a radial force on each piston plate. The radial force of the piston plate, i.e., the horizontal force, is transmitted to the top plate of the laminated rubber bearing. The bottom of the aforementioned piston seat is provided with a liquid guide pipe 13 that connects the liquid storage chamber to the outside of the piston seat side. A valve 14 is provided at the outer end of the liquid guide pipe.

[0029] To ensure a reliable seal in the liquid storage chamber within the piston seat, a liquid storage bladder can be installed within the chamber. This bladder contains pressurized liquid and is connected to a liquid guide tube to regulate inflow and outflow. The liquid storage bladder can be either an elastic bladder or a stress-free bladder, preferably a stress-free bladder. This means the volume of the bladder is slightly larger than the maximum volume of the liquid storage chamber, allowing it to function solely as a seal without bearing external force, thus extending its service life.

[0030] The specific structure of the piston seat is as follows: The piston seat includes a base 6, an outer frame 2, and a top cover 4. The base, outer frame, and top cover are fixed together when the bolts between the piston seat and the base plate are tightened. The outer frame is rectangular, polygonal, or circular. A sealing gasket 3 is provided between the outer frame and the top cover. A lower sealing plate 11 is provided at the bottom of the inner cavity formed by the outer frame and the base. Four sealing pillars 17 are provided on the inner circumference of the outer frame in a centrally symmetrical manner relative to the center of the outer frame. When the sealing gasket, sealing pillars, and lower sealing plate are fixed together with the base, outer frame, and top cover, they form a liquid storage cavity 201 and a piston cavity 202. That is, the center of the four sealing pillars forms a liquid storage cavity, and the piston cavity is formed between adjacent sealing pillars. The outer frame is provided with a through hole for the sliding extension of the support rod 9.

[0031] The base 6, outer frame 2, and top cover 4 are all made of stainless steel. The sealing gasket 3, sealing column 17, and lower sealing plate 11 are made of polytetrafluoroethylene. The elastic sealing gasket 5 is made of foam sponge with low stiffness and high ductility and load-bearing capacity. The pressure block 7 is made of lightweight, high-strength, and high-elastic modulus materials such as polyethylene, polypropylene, or polytetrafluoroethylene. The piston plate 10 is made of lightweight metal plate, such as aluminum plate. The pressure-bearing liquid 12 is made of antifreeze and low-compressibility liquid. The support rod 9 is made of stainless steel.

[0032] Based on the above structure, the use of the present invention will be described as follows.

[0033] In use, this support is installed below the building and above the seismic source, such as above a subway. The laminated rubber seismic isolation bearing 1 is a conventional seismic isolation bearing, primarily functioning as a horizontal seismic isolation unit. When an earthquake causes horizontal vibration in the piston seat base, the piston seat transmits the vibration to the laminated rubber seismic isolation bearing, effectively isolating the horizontal vibration. When subway operation causes slight vertical vibration in the piston seat base, the vibration is transmitted through the piston seat to the base plate 101 of the laminated rubber seismic isolation bearing. The pressure block 7 of the base plate presses against the pressurized liquid 12 in the piston seat's reservoir 201, converting the vertical force into a horizontal force and compressing the piston plate 10 within the piston cavity. The piston plate, through the support rod 9, transmits the horizontal force to the top plate of the laminated rubber bearing 16, achieving horizontal vibration isolation by the laminated rubber bearing, thus achieving overall vertical vibration isolation for the bearing.

[0034] This dual-control vibration support can also be heightened as needed. Specifically, a pressure-releasing device is connected to the valve 14 of the liquid guide pipe 13 to inject pressurized liquid into the storage chamber 201 or to release pressure. When pressurized liquid is injected, the pressure block 7 pushes the base plate 101 of the vibration isolation support to rise relative to the piston seat, while the elastic sealing gasket 5 deforms to adapt to the distance between the base plate and the piston seat, thus achieving the height adjustment. When pressurized liquid is discharged, the base plate descends relative to the piston seat, while the elastic sealing gasket deforms to adapt to the distance between the base plate and the piston seat, thus achieving the lowing operation. The height and lowing operations are mainly to compensate for uneven settlement caused by accidental design errors. This dual-control vibration support can also adjust the vibration reduction performance as needed, that is, by replacing the aforementioned laminated rubber supports 16 with different vibration reduction performance, the horizontal vibration isolation performance can be adjusted, thus achieving the adjustment of vertical vibration isolation.

[0035] In addition, the vibration-controlled support can also change the number of piston chambers 202 of the piston cylinder according to actual installation needs, thereby achieving different structural styles, such as... Figure 3 , Figure 4 , Figure 5The diagrams show structural designs with three piston chambers, two piston chambers, and one piston chamber, respectively. These designs are suitable for different installation positions to meet vibration reduction and isolation requirements, offering diverse installation methods and a wide range of applications.

[0036] The above description is intended to illustrate the technical means of the present invention and is not intended to limit the scope of the invention. Any obvious improvements or substitutions made to the present invention by those skilled in the art based on existing common knowledge also fall within the protection scope of the claims of the present invention.

Claims

1. A replaceably adjustable vibration and shock control support, the support comprising an isolation support and a vibration isolation support, the isolation support being a horizontally isolated laminated rubber isolation support (1), characterised in that The vibration isolation support includes a pressing block (7), a piston seat, a piston plate (10), a support rod (9), and a horizontal vibration isolation laminated rubber support (16). The piston seat is internally provided with a vertical liquid storage cavity (201) and a piston cavity (202) arranged radially relative to the vertical liquid storage cavity. The liquid storage cavity is provided with a pressure-bearing liquid (12), and the liquid storage cavity is provided with the pressing block in a vertically sliding sealing fit. The piston cavity is provided with the piston plate in a sliding sealing fit. One end surface of the piston plate is fixedly connected with the support rod. The support rod horizontally slides out of the piston cavity and is connected with the top plate of the laminated rubber support. The laminated rubber support and the piston seat are fixed on the same support plane. The pressing block is fixed below the bottom plate (101) of the vibration isolation support. The upper end surface of the piston seat and the bottom plate of the vibration isolation support are locked and fixed by a bolt (8). The upper end surface of the piston seat and the bottom plate and the upper end surface of the bottom plate and the head of the bolt are all provided with elastic sealing pads (5) which deform along the height direction of the double-control support. The pressing block extrudes the pressure-bearing liquid under the downward pressure of the vibration isolation support. The pressure-bearing liquid converts the vertical force into a radial force on the piston plate. The radial force of the piston plate is transmitted to the top plate of the laminated rubber support as a horizontal force.

2. The replaceable adjustable dual control vibration isolation mount of claim 1, wherein The bottom of the piston seat is provided with a liquid guide pipe (13) which guides the liquid from the liquid storage cavity (201) to the outside of the side surface of the piston seat. The outer end of the liquid guide pipe is provided with a valve (14).

3. The replaceable adjustable dual control vibration isolation mount of claim 2, wherein The liquid storage cavity (201) is provided with a liquid storage bag body. The pressure-bearing liquid is sealed in the liquid storage bag body. The liquid storage bag body is communicated with the liquid guide pipe.

4. The replaceable adjustable dual control vibration isolation mount of claim 1, wherein The piston seat is provided with at least one piston cavity (202).

5. The replaceable adjustable dual control vibration isolation mount of claim 1, wherein The piston seat includes a base (6), an outer frame (2), and a top cover (4). When the bolt (8) between the piston seat and the bottom plate (101) is locked, the base, the outer frame, and the top cover are fixed together. The outer frame and the top cover are provided with a sealing pad plate (3). The inner cavity formed by the outer frame and the base is provided with a lower sealing plate (11). The inner circumferential surface of the outer frame is provided with a sealing column (17). When the base, the outer frame, and the top cover are fixed, the sealing pad plate, the sealing column, and the lower sealing plate are combined to form the liquid storage cavity (201) and the piston cavity (202). The outer frame is provided with a through hole which is suitable for the sliding extension of the support rod (9).

6. The replaceably adjustable dual-control vibration isolation mount of claim 5, wherein The outer frame (2) is rectangular, polygonal, or circular.

7. The replaceable adjustable dual control vibration isolation mount of claim 5, wherein The sealing pad plate (3), the sealing column (17), and the lower sealing plate (11) are made of polytetrafluoroethylene. The elastic sealing pad (5) is made of foam sponge.

8. The replaceable adjustable dual control vibration isolation mount of claim 1, wherein One end of the pressing block (7) which presses the pressure-bearing liquid (12) is a conical surface.

9. The method of operating a replaceably adjustable seismic double-acting bearing according to claim 1, wherein The horizontal vibration below the vibration isolation support is transmitted to the laminated rubber isolation support (1) through the piston seat, the transmission of the horizontal vibration to the upper building is isolated by the laminated rubber isolation support, and the isolation of the horizontal vibration is realized; the vertical vibration below the vibration isolation support is transmitted to the bottom plate (101) of the isolation support through the piston seat, the pressure block (7) of the bottom plate is extruded relative to the pressure liquid (12) in the piston seat liquid storage cavity (201), the pressure liquid converts the vertical force into a horizontal force, and the piston plate (10) in the piston cavity is extruded, the piston plate transmits the horizontal force to the top plate of the laminated rubber support (16) through the support rod (9), and the horizontal vibration isolation is realized by the laminated rubber support, that is, the vertical vibration isolation is realized.

10. A method of adjusting a replaceably adjustable seismic double control pedestal as claimed in claim 2, characterized in that The adjusting method includes height adjustment and vibration reduction adjustment, the height adjustment is that the pressure liquid (12) is injected into the liquid storage cavity (201) through the liquid guide pipe (13), so as to push the pressure block to drive the bottom plate (101) of the isolation support to rise relative to the piston seat, meanwhile, the elastic sealing gasket (5) is deformed to adapt to the spacing between the bottom plate and the piston seat, and the height adjusting operation is realized; the pressure liquid in the liquid storage cavity is discharged through the liquid guide pipe, so that the bottom plate descends relative to the piston seat, meanwhile, the elastic sealing gasket is deformed to adapt to the spacing between the bottom plate and the piston seat, and the height lowering operation is realized; the vibration reduction adjustment is that the laminated rubber support (16) with different vibration reduction performances is replaced, the horizontal vibration reduction performance adjustment is realized, and the vertical vibration reduction adjustment is realized.

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