CN107620396A - A kind of half active current vortex laminated rubber bases system - Google Patents

Abstract

The invention relates to a semi-active eddy current laminated rubber support system, which is composed of a laminated rubber support and a semi-active eddy current damping system, wherein: the semi-active eddy current damping system consists of fixed parts, permanent magnets, data acquisition and analysis System, magnetic guide plate, actuator, bottom fixed plate and conductor plate. The semi-active eddy current damping system of the present invention can adjust the size of the eddy current damping force in real time according to the instantaneous frequency of the seismic wave when an earthquake occurs, enhance the shock isolation effect of the eddy current laminated rubber bearing system, and reduce the response of the upper structure. The invention replaces traditional viscous damping with eddy current damping, can improve the stability and durability of the damper, and simplify the design of the damper. The magnitude of the damping force of the invention can be changed by changing the distance between the conductor plate and the permanent magnet block in real time by the actuator, so as to improve the vibration isolation effect of the eddy current laminated rubber bearing system.

Description

A semi-active eddy current laminated rubber bearing system

technical field

The invention belongs to the field of anti-seismic engineering, in particular to a semi-active electric eddy current laminated rubber bearing system.

Background technique

Earthquakes are natural disasters that seriously threaten the safety of people's lives and property. Traditional building structures are protected against earthquakes in a "resistance" manner. This approach is not only uneconomical, but also may amplify the earthquake effect on the contrary. Seismic isolation structure is a new form of earthquake-resistant structure. By adding a seismic isolation layer at the bottom of the building structure, the natural vibration period of the upper structure is increased to reduce the seismic response, and the seismic energy is consumed through the damping device. Laminated rubber bearings are widely used in seismic isolation structures.

Traditional laminated rubber bearings often use hydraulic viscous dampers to provide additional damping. While providing damping, there is also a certain stiffness, which cannot completely separate stiffness and damping, which affects design analysis. Moreover, the hydraulic viscous damper also has problems such as oil leakage, difficult maintenance, and difficult adjustment in the later stage, which increases the difficulty and cost of maintenance. Eddy current damping is a major innovation of hydraulic viscous damping. The principle of the eddy current damper is that the conductor mass cuts the magnetic induction line when it is moving. According to Faraday's electromagnetic induction principle, an induced electromotive force will be generated in the conductor to form an eddy current, and the vibration energy will be converted into the heat of the conductor, thereby realizing vibration. control. The advantages of the eddy current damper are: there is no direct contact between the magnet and the conductor, no frictional damping and wear; it is not affected by the environment such as temperature; there is no oil leakage, etc., it is easy to maintain and has good durability.

Semi-active control is an emerging form of structural vibration control. Semi-active control has improved the control effect of the seismic isolation device by adding a control system to the seismic isolation device, which can not only ensure the safety of the building structure under the action of earthquakes, but also has the advantages of requiring less external energy and high stability.

Contents of the invention

The purpose of the present invention is to provide a semi-active eddy current laminated rubber bearing system to overcome the above-mentioned shortcomings in the prior art. Under the action of an earthquake, it can collect and analyze the instantaneous frequency of seismic waves in real time, and control the actuator to adjust The eddy current damping force is used to change the damping of the entire eddy current laminated rubber bearing system, improve the shock isolation effect, and ensure the safety of the upper structure.

To achieve the above object, the present invention adopts the following technical solutions:

A semi-active eddy current laminated rubber support system proposed by the present invention is composed of a laminated rubber support 2 and a semi-active eddy current damping system 5, wherein: the laminated rubber support 2 is located on both sides of the bottom of the upper structure 1, The laminated rubber bearing 2 is fixed above the foundation, and the semi-active eddy current damping system 5 is located in the space formed by the laminated rubber bearing 2, the superstructure 1 and the foundation; the semi-active eddy current damping system 5 consists of a fixed part 3, Composed of permanent magnet 4, data acquisition and analyzer 6, magnetic guide plate 7, actuator 8, bottom fixed plate 9 and conductor plate 10, permanent magnet 4 is connected to the bottom of superstructure 1 through fixed part 3, and bottom fixed plate 9 is fixed On the top of the foundation, one end of the actuator 8 is installed on the top of the bottom fixed plate 9, and the other end is installed on the bottom of the magnetic permeable plate 7. A conductor plate 10 is fixed above the magnetic permeable plate 7, and the conductor plate 10 is located under the permanent magnet 4. Data acquisition and The analyzer 6 is fixed on the foundation, and the data acquisition and analyzer 6 is connected to the actuator 8. When an earthquake occurs, the permanent magnet 4 vibrates horizontally and moves with the conductor plate 10 to cut the magnetic induction line. Heating consumes seismic energy, and the function of the magnetically conductive plate 7 is to enhance the magnetic field strength and improve the energy consumption effect.

In the present invention, the fixing part 3 is fixedly installed on the bottom of the superstructure 1, and the permanent magnet 4 is fixed on the bottom of the fixing part 3 with bolts.

In the present invention, when an earthquake occurs, the data acquisition and analyzer 6 can collect and process the instantaneous frequency of the seismic wave in real time, and control the actuator 8 to move up and down according to the obtained instantaneous frequency, so as to change the conductor plate 10 and the permanent magnet. 4, change the size of the eddy current damping force.

In the present invention, the material of the permanent magnet block can be rare earth permanent magnet material, samarium cobalt, nickel cadmium cobalt, ferrite permanent magnet material, etc.; the material of the conductor plate can be copper, aluminum, etc.; The material of the plate can be iron, cadmium, cobalt, etc.

In the present invention, the vertical moving distance of the actuator ranges from 2 to 15 mm.

Compared with the prior art, the present invention has the following beneficial technical effects:

A semi-active eddy current laminated rubber bearing system of the present invention can collect and analyze the instantaneous frequency of seismic waves in real time under the action of an earthquake, and control the actuator to adjust the eddy current damping force to change the entire eddy current laminated rubber bearing system. The damping of the seat system improves the shock isolation effect and ensures the safety of the upper structure.

Description of drawings

Fig. 1 is a front view of a semi-active eddy current laminated rubber bearing system of the present invention;

Fig. 2 is a schematic diagram of the semi-active eddy current damping system of the present invention;

Labels in the figure: 1-upper structure, 2-laminated rubber bearing, 3-fixed parts, 4-permanent magnet, 5-semi-active eddy current damping system, 6-data acquisition and analysis system, 7-magnetic plate, 8-actuator, 9-bottom fixed plate, 10-conductor plate.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figures 1 to 2, a semi-active eddy current laminated rubber bearing system of the present invention consists of a laminated rubber bearing 2 and a semi-active eddy current damping system 5, wherein:

The semi-active eddy current damping system 5 is composed of a fixed part 3 , a permanent magnet 4 , a data acquisition and analyzer 6 , a magnetic guide plate 7 , an actuator 8 , a bottom fixed plate 9 and a conductor plate 10 .

The fixing part 3 is fixedly installed on the bottom of the superstructure 1, and the permanent magnet 4 is fixed on the bottom of the fixing part 3 with bolts.

When an earthquake occurs, the permanent magnet 4 vibrates horizontally and cuts the magnetic induction line with the conductor plate 10. The seismic energy is consumed by the heating of the conductor plate 10. The function of the magnetic guide plate 7 is to enhance the magnetic field strength and increase energy consumption. Effect.

The data acquisition and analyzer 6 can collect and process the instantaneous frequency of the seismic wave in real time when an earthquake occurs, and control the up and down movement of the actuator 8 according to the built-in algorithm.

The bottom fixing plate 9 is fixed to the ground, and the actuator 8 is installed on the top of the bottom fixing plate 9 and the bottom of the magnetic conductive plate 7 . It moves up and down under the control of the data acquisition and analyzer 6, thereby changing the distance between the conductor plate 10 and the permanent magnet 4, and changing the magnitude of the eddy current damping force.

The material of the permanent magnet block 7 can be rare earth permanent magnet material, samarium cobalt, nickel cadmium cobalt, ferrite permanent magnet material, etc.; the material of the conductor plate 8 can be copper, aluminum, etc.; The material can be iron, cadmium, cobalt and so on.

The movable bearing 10 moves up and down in a range of 2 to 15 mm.

The description and application of the invention herein is illustrative and is not intended to limit the scope of the invention to the above-described embodiments. Variations and changes to the embodiments disclosed herein are possible, and substitutions and equivalents for various components of the embodiments are known to those of ordinary skill in the art. It should be clear to those skilled in the art that the present invention can be realized in other forms, structures, arrangements, proportions, and with other components, materials and components without departing from the spirit or essential characteristics of the present invention. Other modifications and changes may be made to the embodiments disclosed herein without departing from the scope and spirit of the invention.

Claims (3)

1. a kind of half active current vortex laminated rubber bases system, it is characterised in that by laminated rubber bases（2）It is actively electric with half Eddy current damping system（5）Composition, wherein：Laminated rubber bases（2）Positioned at superstructure（1）Two bottom sides, laminated rubber bases （2）It is fixed on above basis, half active eddy-current damping system（5）Positioned at laminated rubber bases（2）, superstructure（1）And base In the space of plinth composition；The half active eddy-current damping system（5）By fixed component（3）, permanent magnet（4）, data acquisition with Analyzer（6）, magnetic conductive board（7）, actuator（8）, bottom fixed board（9）And conductor plate（10）Composition, permanent magnet（4）Pass through fixation Part（3）It is connected to superstructure（1）Bottom, bottom fixed board（9）It is fixed at the top of basis, actuator（8）One end is installed on Bottom fixed board（9）Top, the other end are installed on magnetic conductive board（7）Bottom, magnetic conductive board（7）It is fixedly arranged above conductor plate（10）, lead Body plate（10）Positioned at permanent magnet（4）Lower section, data collection and analysis device（6）On the basis of being fixed on, data collection and analysis device（6） Connect actuator（8）, when earthquake occurs, the permanent magnet（4）Occurred level is to vibration, with conductor plate（10）Magnetic is cut in generation The line of induction moves, and passes through conductor plate（10）Heating earthquake energy, the magnetic conductive board（7）Act as strengthen magnetic field it is strong Degree, improve energy consumption effect.

A kind of 2. half active current vortex laminated rubber bases system according to claim 1, it is characterised in that the fixation Part（3）It is fixedly installed in superstructure（1）Bottom, permanent magnet（4）It is bolted to fixed component（3）Bottom.

A kind of 3. half active current vortex laminated rubber bases system according to claim 1, it is characterised in that the data Collection and analyzer（6）When earthquake occurs, it is capable of the instantaneous frequency of timely collection seismic wave, and according to the instantaneous of acquisition FREQUENCY CONTROL actuator（8）Move up and down, conductor plate is changed with this（10）With permanent magnet（4）Between spacing distance, change The size of eddy-current damping power.