Piezoelectric energy consumption-based vertical vibration reduction support for bridge engineering

Abstract

The utility model discloses a vertical vibration reduction support based on piezoelectric energy consumption for bridge engineering, which comprises a base plate, a lower seat plate arranged in the base plate, a middle seat plate arranged on the lower seat plate, an upper seat plate arranged on the middle seat plate, and a vibration reduction disc arranged in the base plate and used for vertical vibration reduction. The upper end of the damping disc makes contact with the lower seat plate, a piezoelectric energy dissipation assembly is arranged between the damping disc and the base plate, the damping disc is in an arch shape, the arc face of the damping disc is connected with the pressure bearing block, and the plane of the lower end of the pressure bearing block is connected with the piezoelectric energy dissipation assembly. The vibration reduction disc is made of a spring steel material and adopts an arch-shaped structure, so that stable vertical support can be provided for an upper structure under the action of static force. Vibration reduction and energy consumption of the vertical support are achieved through the piezoelectric energy consumption assembly, the piezoelectric energy consumption assembly converts high-frequency vibration mechanical energy of the support into electric energy through the two piezoelectric ceramic plates, the energy consumption efficiency is high, the working temperature range is wide, and the adaptive capacity is high.

Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering technology, specifically relating to a vertical vibration damping support based on piezoelectric energy dissipation for bridge engineering. Background Technology

[0002] Currently, with the large-scale construction of high-speed railways in my country, the impact of high operating speeds and densities on environmental vibration has gradually become a key concern for the entire society. The most significant characteristic of the environmental vibration impact of high-speed railway bridge structures is their long duration and increasing trend. Generally, the interval between trains on double-track railways is 2-3 minutes, and the shortest interval for rail transit in the world has been reduced to 1.5 minutes. This long-term, insidious vibration has significant negative impacts on public health, building structures, and precision instruments. In recent years, environmental assessments, including vibration impacts, have become an indispensable procedure in the planning and design of new rail transit systems in China.

[0003] The main function of traditional seismic isolation bearings is to reduce the vibration response of the substructure under horizontal loads. However, research on vertical vibration isolation bearing technology for reducing the vibration response of the substructure (piers, foundations) and the surrounding environment under the dynamic action of high-speed trains is relatively limited, and the main problems are as follows:

[0004] 1. Although vibration damping bearings made of steel can reduce the vibration response of the substructure to a certain extent, the lack of damping energy dissipation components in the bearings makes it difficult to dissipate the vibration of the bridge structure caused by trains. Moreover, as the density of train operation increases, the response of structural vibration will gradually accumulate. During periods of intensive train operation, the impact of train vibration on the environment will persist for a long time.

[0005] 2. Although some bearing products are made of all-metal materials, the long-term continuous vibration mentioned above can cause fatigue problems in the metal vibration damping components, resulting in premature failure of the bearing.

[0006] 3. Currently, some bearings use high-damping rubber materials or liquid viscous damping devices to provide damping force. However, these two damping and vibration reduction methods have the following problems:

[0007] (1) Rubber materials are prone to aging. The life cycle of bridges / bearings is usually long, and it is difficult to guarantee the stability of rubber materials during use in harsh environments.

[0008] (2) The effective vibration reduction frequency range of the vibration damping support is: Where ω is the vibration frequency of the external load, ω n Let be the natural frequency of the support body. According to the basic principles of structural dynamics, when At that time, by adding viscous energy dissipation to the vibration damping support, the force transmission rate will actually increase. Summary of the Invention

[0009] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a vertical vibration damping support based on piezoelectric energy dissipation for bridge engineering.

[0010] The technical solution of this utility model is: a vertical vibration damping support based on piezoelectric energy dissipation for bridge engineering, including a base plate, a lower support plate disposed therein, a middle support plate disposed on the lower support plate, an upper support plate disposed on the middle support plate, a vibration damping disk for vertical vibration damping disposed in the base plate, the upper end of the vibration damping disk contacting the lower support plate, and a piezoelectric energy dissipation component disposed between the vibration damping disk and the base plate.

[0011] Furthermore, the damping disc is arched, with its arc surface connected to the pressure-bearing block, and the lower end plane of the pressure-bearing block connected to the piezoelectric energy-dissipating component.

[0012] Furthermore, the piezoelectric energy-consuming component includes an upper high-resistance conductive cylinder and a lower high-resistance conductive cylinder, which are cylindrical with shaft holes joined together, and a hollow cavity is formed inside the upper and lower high-resistance conductive cylinders.

[0013] Furthermore, the upper and lower surfaces of the piezoelectric energy-consuming component are both provided with piezoelectric ceramic plates, and electrode plates are provided on the surface of the piezoelectric ceramic plates. Conductive plates are provided between the piezoelectric ceramic plates to ensure effective charge transfer.

[0014] Furthermore, the electrode plates are connected to the upper high-resistance conductive cylinder and the lower high-resistance conductive cylinder, respectively.

[0015] Furthermore, elongated holes are formed at the side walls of the upper and lower high-resistance conductive cylinders, and bolts connecting the two are provided in the elongated holes.

[0016] Furthermore, a support slide plate is provided between the vibration damping disc and the base plate, which ensures that the vibration damping disc can slide horizontally on the base plate.

[0017] Furthermore, a lower guide strip is provided between the damping disc and the side wall of the base plate, and a certain gap is maintained between the lower guide strip and the side wall of the base plate to release the radial deformation of the damping disc.

[0018] Furthermore, a guide friction pair is provided between the side wall of the base plate and the outer side wall of the lower base plate.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model's vertical vibration damping support is designed with all-metal materials, enabling simultaneous vertical and horizontal vibration damping functions, overcoming the problems of easy aging and fatigue in existing vertical vibration damping supports. It employs piezoelectric energy dissipation, avoiding the force transmission rate amplification phenomenon caused by viscous damping energy dissipation.

[0021] The vibration damping disc of this invention is made of spring steel and adopts an arched structure, which can provide stable vertical support for the superstructure under static loads. Under the action of additional vertical dynamic loads on the train, the vibration damping disc, which has relatively low vertical stiffness, undergoes downward vertical deformation. The vibration damping requirements of the support under different frequency inputs can be met by changing the thickness and diameter of the vibration damping disc.

[0022] The present invention provides a support slide plate between the damping disc and the base plate, and a guide strip between the damping disc and the side wall of the base plate. A certain gap is maintained between the guide strip and the side wall of the base plate to release the radial deformation of the damping disc and effectively improve the vertical damping performance of the support.

[0023] This utility model uses a piezoelectric energy dissipation component to achieve vibration reduction and energy dissipation of the vertical support. The piezoelectric energy dissipation component uses two piezoelectric ceramic plates to convert the high-frequency vibration mechanical energy of the support into electrical energy. It has high energy dissipation efficiency, wide operating temperature range, and strong adaptability, and can effectively reduce the vibration amplitude and duration of the support under the vertical dynamic load of the train. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the vertical vibration damping support structure in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the medium-voltage power consumption component of this utility model;

[0026] Figure 3 This is a schematic diagram of the high-resistance conductive cylinder structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the polarization direction of the piezoelectric ceramic plate in the piezoelectric energy dissipation component of this utility model;

[0028] The components are: 1. Upper seat plate, 2. Base plate, 3. Middle seat plate, 4. Planar friction pair, 5. Spherical friction pair, 6. Lower seat plate, 7. Curved friction pair, 8. Vibration damping plate, 9. Pressure block, 10. Piezoelectric energy dissipation component, 11. Support slide plate, 12. Lower guide bar, 13. Guide friction pair, 10-1. Piezoelectric ceramic plate, 10-2. Conductive plate, 10-3. Electrode plate, 10-4. Upper high-resistance conductive cylinder, 10-5. Lower high-resistance conductive cylinder, 10-6. Bolt. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0030] like Figures 1 to 4 As shown, a vertical vibration damping support based on piezoelectric energy dissipation for bridge engineering includes a base plate 2, a lower support plate 6 disposed therein, a middle support plate 3 disposed on the lower support plate 6, and an upper support plate 1 disposed on the middle support plate 3. A vibration damping disk 8 for vertical vibration damping is disposed in the base plate 2, the upper end of the vibration damping disk 8 is in contact with the lower support plate 6, and a piezoelectric energy dissipation component 10 is disposed between the vibration damping disk 8 and the base plate 2.

[0031] The vibration damping disc 8 is arched, and the arc surface of the vibration damping disc 8 is connected to the pressure block 9. The lower end plane of the pressure block 9 is connected to the piezoelectric energy dissipation component 10.

[0032] The piezoelectric energy dissipation component 10 includes an upper high-resistance conductive cylinder 10-4 and a lower high-resistance conductive cylinder 10-5. The upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 are cylindrical with shaft holes joined together, and hollow cavities are formed inside the upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5.

[0033] The piezoelectric energy dissipation component 10 has piezoelectric ceramic plates 10-1 on both its upper and lower surfaces, and electrode plates 10-3 are provided on the surface of the piezoelectric ceramic plates 10-1. Conductive plates 10-2 are provided between the piezoelectric ceramic plates 10-1 to ensure effective charge transfer.

[0034] The electrode plate 10-3 is connected to the upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5, respectively.

[0035] The upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 are aligned to form an elongated hole on their side walls, and a bolt 10-6 connecting the two is provided in the elongated hole.

[0036] A support slide plate 11 is provided between the vibration damping disc 8 and the base plate 2, and the support slide plate 11 ensures that the vibration damping disc 8 can slide horizontally on the base plate 2.

[0037] A lower guide strip 12 is provided between the damping disc 8 and the side wall of the base plate 2. A certain gap is maintained between the lower guide strip 12 and the side wall of the base plate 2 to release the radial deformation of the damping disc 8.

[0038] A guide friction pair 13 is provided between the side wall of the base plate 2 and the outer side wall of the lower base plate 6.

[0039] Specifically, a planar friction pair 4 is provided between the upper seat plate 1 and the middle seat plate 3, and a spherical friction pair 5 is provided between the middle seat plate 3 and the lower seat plate 6. The planar friction pair 4 and the spherical friction pair 5 jointly undertake the vertical bearing, horizontal sliding, and vertical rotation functions of the support. The horizontal force of the support is realized through the guide friction pair 13 provided between the lower seat plate 6 and the base plate 2.

[0040] Specifically, the damping disc 8 is made of spring steel and has an arched structure, which provides stable vertical support to the upper structure under static loads. Under the action of the train's vertical dynamic load, the damping disc 8 undergoes downward vertical deformation.

[0041] Specifically, a support slide plate 11 is provided between the damping disc 8 and the base plate 2 to ensure that the damping disc 8 can slide horizontally on the base plate 2. A lower guide strip 12 is provided between the damping disc 8 and the side wall of the base plate 2, and a certain gap is maintained between the lower guide strip 12 and the side wall of the base plate 2 to release the radial deformation of the damping disc 8.

[0042] Specifically, a pressure block 9, made of spring steel, is installed between the damping disc 8 and the piezoelectric energy dissipation component 10. Under the action of the train's vertical dynamic load, the damping disc 8 undergoes downward vertical deformation, transferring the vertical dynamic load to the pressure block 9, and then to the piezoelectric energy dissipation component 10.

[0043] Specifically, a curved friction pair 7 is provided between the pressure block 9 and the bottom surface of the damping disk 8 to ensure that the radial deformation of the damping disk 8 and the pressure block 9 do not interfere with each other, and a certain amount of friction energy can be dissipated by using the curved friction pair 7.

[0044] Specifically, when there is no train running, a small gap is maintained between the pressure block 9 and the damping plate 8 to ensure that the damping plate 8 can provide an effective vertical starting stiffness.

[0045] Specifically, the piezoelectric energy dissipation component 10 consists of an electrode plate 10-3, a piezoelectric ceramic plate 10-1, a conductive plate 10-2, an upper high-resistance conductive cylinder 10-4, a lower high-resistance conductive cylinder 10-5, and bolts 10-6. Under vertical dynamic pressure, positive and negative charges are generated on the outer surfaces of the upper and lower piezoelectric ceramic plates 10-1, respectively. The upper and lower high-resistance conductive cylinders 10-4 and 10-5 connect the upper and lower piezoelectric ceramic plates 10-1. The voltage difference between the electrode plates 10-3 generates current in the electrical circuit of the piezoelectric energy dissipation component 10, and the upper and lower high-resistance conductive cylinders 10-4 and 10-5 convert electrical energy into heat energy.

[0046] Specifically, both the upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 are provided with elongated holes, with the diameter of the lower high-resistance conductive cylinder 10-5 being smaller than the diameter of the upper high-resistance conductive cylinder 10-4. The upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 are connected by bolts 10-6. This ensures that the upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 can undergo vertical relative deformation, and guarantees an effective connection between the two, forming a complete current loop.

[0047] Specifically, the polarization directions of the two piezoelectric ceramic plates 10-1 on the upper and lower surfaces are opposite, ensuring that under pressure, the outer surface of one piezoelectric ceramic plate 10-1 generates a positive charge and the outer surface of the other piezoelectric ceramic plate 10-1 generates a negative charge, thereby forming a voltage difference between the upper and lower electrode plates 10-3.

[0048] The vertical vibration damping support of this invention utilizes a damping disc 8 to achieve vertical vibration damping performance, and a piezoelectric energy dissipation component 10 to achieve the vertical vibration damping effect. The damping disc 8 is made of spring steel, and its arched structure ensures stable vertical support to the superstructure under static loads. Under additional vertical dynamic loads from the train, the damping disc 8, with its relatively low vertical stiffness, undergoes downward vertical deformation. Designers can adjust the thickness and diameter of the damping disc 8 to meet the vibration damping requirements of the support under different frequency inputs.

[0049] Under the vertical vibration load of a train, the damping disc 8 undergoes vertical deformation, which, through the pressure block 9, compresses the piezoelectric energy dissipation component 10 below it. Under the action of vertical dynamic pressure, positive and negative charges are generated on the outer surfaces of the upper and lower piezoelectric ceramic plates 10-1 of the piezoelectric energy dissipation component 10, respectively. The voltage difference between the bottom and upper electrode plates 10-3 generates current in the electrical circuit of the piezoelectric energy dissipation component 10, and the upper high-resistance conductive cylinder 10-4 and the lower high-resistance conductive cylinder 10-5 convert electrical energy into heat energy. Thus, the vibration mechanical energy of the support is converted into electrical energy, resulting in high energy dissipation efficiency, a wide operating temperature range, and strong adaptability. It avoids the phenomenon of force transmission rate amplification caused by using viscous damping energy dissipation, and can effectively reduce the vibration time and response peak of the support under the vertical dynamic load of the train.

Claims

1. A vertical vibration reduction bearing based on piezoelectric energy consumption for bridge engineering, comprising a base plate (2), a lower seat plate (6) is arranged in the base plate (2), a middle seat plate (3) is arranged on the lower seat plate (6), and an upper seat plate (1) is arranged on the middle seat plate (3), characterized in that: The base plate (2) is provided with a damping disc (8) for vertical damping, the upper end of the damping disc (8) is in contact with the lower base plate (6), and a piezoelectric energy consumption component (10) for support energy consumption is arranged between the damping disc (8) and the base plate (2). ​ 2. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 1, characterized in that: The damping disc (8) is arched, the circular surface of the damping disc (8) is connected with the pressure block (9), and the lower end plane of the pressure block (9) is connected with the piezoelectric energy consumption component (10).

3. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 2, characterized in that: The piezoelectric energy consumption component (10) comprises an upper high-resistance conductive cylinder (10-4) and a lower high-resistance conductive cylinder (10-5), the upper high-resistance conductive cylinder (10-4) and the lower high-resistance conductive cylinder (10-5) are in the form of a cylindrical hole pair, and a hollow cavity is formed in the upper high-resistance conductive cylinder (10-4) and the lower high-resistance conductive cylinder (10-5).

4. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 3, characterized in that: The upper surface and the lower surface of the piezoelectric energy consumption component (10) are provided with piezoelectric ceramic plates (10-1), the surfaces of the piezoelectric ceramic plates (10-1) are provided with electrode plates (10-3), and the piezoelectric ceramic plates (10-1) are provided with conductive plates (10-2) to ensure effective transfer of electric charge.

5. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 4, characterized in that: The electrode plates (10-3) are connected with the upper high-resistance conductive cylinder (10-4) and the lower high-resistance conductive cylinder (10-5) respectively.

6. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 3, characterized in that: The upper high-resistance conductive cylinder (10-4) and the lower high-resistance conductive cylinder (10-5) are in position at the side walls to form long holes, and bolts (10-6) connecting the two are arranged in the long holes.

7. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 2, characterized in that: The damping disc (8) and the base plate (2) are provided with a support sliding plate (11), and the support sliding plate (11) ensures that the damping disc (8) can slide horizontally on the base plate (2).

8. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 2, characterized in that: The damping disc (8) and the side wall of the base plate (2) are provided with a lower guide strip (12), and a gap is reserved between the lower guide strip (12) and the side wall of the base plate (2) to release the radial deformation of the damping disc (8).

9. A piezoelectric energy dissipation based vertical vibration mitigation bearing for bridge engineering according to claim 2, characterized in that: The side wall of the base plate (2) and the outer side wall of the lower base plate (6) are provided with a guide friction pair (13).

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