CN109854053A - Intelligent three-dimensional shock insulation and vibrating isolation system - Google Patents
Intelligent three-dimensional shock insulation and vibrating isolation system Download PDFInfo
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- CN109854053A CN109854053A CN201910079525.1A CN201910079525A CN109854053A CN 109854053 A CN109854053 A CN 109854053A CN 201910079525 A CN201910079525 A CN 201910079525A CN 109854053 A CN109854053 A CN 109854053A
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- sliding block
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- vibrating isolation
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Abstract
The invention discloses a kind of intelligent three-dimensional shock insulation and vibrating isolation systems, it include: friction-pendulum shock-insulation support, piezoelectric intelligent vibration insulation and controller, wherein, friction-pendulum shock-insulation support is made of lower slide curved slab, middle part plate and sliding block, and horizontal earthquake is isolated in horizontal earthquake for system；Piezoelectric intelligent vibration insulation is made of upper flat plate, middle part plate and multiple piezoelectric actuators, and vertical motion is isolated in vertical motion for system；Controller is used to generate control signal according to the response signal of upper flat plate, and controls multiple piezoelectric actuators according to control signal and vibrate, to inhibit vertical motion.The system is combined by active control with passive control, can preferably be suitable for wide band ambient vibration, and can play good inhibitory effect to vertical motion caused by rail traffic etc. in the case where level of isolation earthquake.
Description
Technical field
The present invention relates to civil engineering structure shock insulation and vibration isolation technique field, in particular to a kind of intelligent three-dimensional shock insulation with every
Vibrating system.
Background technique
Currently, the proposition of base isolation and vibration isolation technique proposes new solution to building structure aseismatic, it changes
The thinking for directly resisting geological process in traditional structure using bearing structural system, by the way that shock insulation is arranged in building structure bottom
Geological process is effectively reduced in layer, can more effectively protect the safety of building structure and indoor equipment, can be obviously improved and build
After building structure shake function can recovery capability, there is traditional unrivaled superiority of anti-seismic technology.
With the rapid growth of Chinese national economy and being growing for urban construction scale, urban transport problems is increasingly
It highlights, urban track traffic runs the common concern that caused ambient vibration and noise problem have caused people.To meet
Requirement of the building structure to ambient vibration all has the three-dimensional isolation of vibration isolating effect to horizontal vibrating and vertical motion in recent years
It is developed with vibration isolating suspension.This kind of three-dimensional isolations and vibration isolating suspension combine horizontal seismic isolation and vertical vibration isolation basis, can
To realize the isolation and energy consumption to earthquake and ambient vibration simultaneously.However existing three-dimensional isolation and vibration isolation technique are all to belong to
It is a kind of control of narrowband in the passive control field of structure, it cannot be according to the sound of the spectral characteristic and structure itself of excitation
It should be adjusted, control effect significantly affected by external condition.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, it is an object of the invention to propose that a kind of intelligent three-dimensional shock insulation and vibrating isolation system, the system can be better
Suitable for wide band ambient vibration, and rail traffic etc. can be caused in the case where level of isolation earthquake or vibration
Ambient vibration play good inhibitory effect.
In order to achieve the above objectives, the embodiment of the present invention proposes a kind of intelligent three-dimensional shock insulation and vibrating isolation system, comprising: friction
Shock isolating pedestal is put, the friction-pendulum shock-insulation support is made of lower slide curved slab, middle part plate and sliding block, is used for the system
The horizontal earthquake is isolated in horizontal earthquake；Piezoelectric intelligent vibration insulation, piezoelectric intelligent vibration insulation is by upper flat plate, the middle part
Plate and multiple piezoelectric actuators composition, the vertical motion is isolated in vertical motion for the system；Controller, it is described
Controller is used to generate control signal according to the response signal of the upper flat plate, and described more according to control signal control
A piezoelectric actuator vibration, to inhibit the vertical motion.
The intelligent three-dimensional shock insulation and vibrating isolation system of the embodiment of the present invention, by the active Vibration Isolation based on piezoelectric material,
To effectively overcome passive vibration isolation technology cannot be adjusted according to the response of the spectral characteristic and structure itself of excitation and
The shortcomings that control effect is significantly affected by external condition, and then can preferably be suitable for wide band ambient vibration, together
When combine friction-pendulum shock-insulation support, can in the case where level of isolation earthquake, to ambient vibration caused by rail traffic etc. rise
To good inhibitory effect.
In addition, intelligent three-dimensional shock insulation according to the above embodiment of the present invention can also have with vibrating isolation system it is following additional
Technical characteristic:
Further, in one embodiment of the invention, the multiple piezoelectric actuator by binding material with it is described
Upper flat plate and the middle part plate are bonded.
Further, in one embodiment of the invention, further includes: sliding layer.
Further, in one embodiment of the invention, the sliding block includes top shoe and sliding block, the upper downslide
Block is oppositely arranged up and down, wherein is coated with the sliding layer or described on the contact surface of the top shoe and the sliding block
The sliding layer is wiped on the predetermined fraction of the contact surface of top shoe and the sliding block.
Further, in one embodiment of the invention, further includes: top limiting device, the limiting device setting
At the lower surface of the middle part plate, it is within the top limiting device for limiting the top shoe；Lower limit
Device, the lower limit device is set at the upper surface of the lower slide curved slab, for limiting at the sliding block
Within the lower limit device.
Further, in one embodiment of the invention, further includes: acceleration transducer, the acceleration transducer
Positioned at the upper surface of the upper flat plate, the response signal of the upper flat plate is obtained for detecting.
Further, in one embodiment of the invention, further includes: power amplifier, for amplifying the control letter
Number.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is according to the intelligent three-dimensional shock insulation of one embodiment of the invention and the structural schematic diagram of vibrating isolation system；
Fig. 2 is according to the intelligent three-dimensional shock insulation of one embodiment of the invention and the a-a sectional view schematic diagram of vibrating isolation system；
Fig. 3 is according to the intelligent three-dimensional shock insulation of one embodiment of the invention and the process principle figure of vibrating isolation system.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The intelligent three-dimensional shock insulation proposed according to embodiments of the present invention and vibrating isolation system are described with reference to the accompanying drawings.
Fig. 1 is the intelligent three-dimensional shock insulation of one embodiment of the invention and the structural schematic diagram of vibrating isolation system.
As shown in Figure 1, the intelligent three-dimensional shock insulation and vibrating isolation system 10 include: friction-pendulum shock-insulation support 100, piezoelectric intelligent every
Shake layer 200 and controller 300 (not being specifically identified in figure).
Wherein, friction-pendulum shock-insulation support 100 is made of lower slide curved slab 110, middle part plate 120 and sliding block 130, is used
In intelligent three-dimensional shock insulation with vibrating isolation system 10 in horizontal earthquake when horizontal earthquake is isolated.Piezoelectric intelligent vibration insulation 200 is by upper flat
Plate 210, middle part plate 120 and multiple piezoelectric actuators 220 form, and are vertically shaking for intelligent three-dimensional shock insulation and vibrating isolation system 10
Vertical motion is isolated when dynamic.Controller 300 is used to generate control letter according to the response signal acceleration signal of upper flat plate 210
Number, and multiple piezoelectric actuators 220 are controlled according to control signal and are vibrated, to inhibit vertical motion.The system of the embodiment of the present invention
10 are combined by active control with passive control, can isolate ambient vibration while earthquake is isolated.
It is understood that the friction pendulum vibration isolation being made of lower slide curved slab 110, middle part plate 120 and sliding block 130
Support 100 can be used for being isolated earthquake, and combine by upper flat plate 210, middle part plate 120 and 220 groups of multiple piezoelectric actuators
At piezoelectric intelligent vibration insulation 200 can be used for that vertical motion is isolated, for example, the vertical motion of the generation of rail traffic.This hair
The intelligent vibration control that bright embodiment is combined using piezoelectricity Vibration Active Control technology with friction pendulum passive vibration control technology
System 10 isolation environment can be vibrated simultaneously while earthquake is isolated, and be can be used for by influence of ambient vibration
Building, structures can be used for the historical relic for having antidetonation and vibrationproof demand simultaneously, furniture and working table lamp etc..
It should be noted that the intelligent three-dimensional shock insulation of the embodiment of the present invention and vibrating isolation system 10 are in specific application, ability
Specific location and direction can be arranged in field technique personnel according to the actual situation, for example, as shown in Figure 1, friction-pendulum shock-insulation support
100 under, piezoelectric intelligent vibration insulation in upper set-up mode, alternatively, friction-pendulum shock-insulation support 100 is in upper, piezoelectric intelligent vibration isolation
Set-up mode of the layer 200 under, is not specifically limited herein.
In specific application, the system 10 of the embodiment of the present invention is mountable to the substrate of building, structures, it can also be used to
There are the historical relic of antidetonation and vibrationproof demand, furniture and working table lamp simultaneously.When an earthquake occurs, friction-pendulum shock-insulation support can be passed through
Shock insulation；Ambient vibration excitation under, can use piezoelectric intelligent vibration insulation active control technology, to wide band ambient vibration into
Row inhibits.
Intelligent three-dimensional shock insulation and vibrating isolation system 10 will be further elaborated below.
Further, in one embodiment of the invention, the multiple piezoelectric actuator 220 passes through binding material and institute
It states upper flat plate 210 and the middle part plate 120 is bonded.Wherein, binding material can be epoxy resin, certainly, bonding
Material can also include many kinds, and those skilled in the art can select according to actual needs, to avoid redundancy, herein not
It repeats.
Specifically, piezoelectric actuator one end in each of multiple piezoelectric actuators 220 by epoxy resin with it is described
The lower surface of upper flat plate 210 is connected, and the other end of each piezo actor in the multiple piezoelectric actuator 220 passes through ring
Oxygen resin is connected with the upper surface of the middle part plate 120.It is understood that the specific setting of multiple piezoelectric actuators 220
Mode and setting quantity number, those skilled in the art can be configured according to the actual situation, not do herein specific
Limitation.
Further, in one embodiment of the invention, as shown in Fig. 2, the system 10 of the embodiment of the present invention further include:
Sliding layer 400.Wherein, sliding layer 400 can be with polytetrafluoroethylene ethylene layer, certainly, and sliding layer 400 or others are for sliding
Layer, those skilled in the art can select according to the actual situation, be not specifically limited herein.
Further, in one embodiment of the invention, sliding block 130 includes top shoe and sliding block, on upper sliding block
Under be oppositely arranged, wherein be coated with sliding layer or top shoe and sliding block on the contact surface of top shoe and sliding block
Contact surface predetermined fraction on be wiped with sliding layer, so as to effectively reduce the friction between upper sliding block.
That is, sliding layer all can be coated on the contact surface of top shoe and sliding block, it is of course also possible to
Part is coated with sliding layer, and those skilled in the art can be configured according to actual use demand, not do specific limit herein
It is fixed.
Further, in one embodiment of the invention, the system 10 of the embodiment of the present invention further include: top limit dress
Set 500 and lower limit device 600.
Wherein, top limiting device 500 is set at the lower surface of middle part plate 120, for limiting at the top shoe
Within the limiting device of top.Lower limit device 600 is set at the upper surface of lower slide curved slab 110, for limiting
The sliding block is within lower limit device.
It is understood that system of the embodiment of the present invention passes through on middle part plate 120 and lower slide curved slab 10
There are limiting device, i.e. top limiting device 500 and lower limit device 600, so as to effectively prevent sliding block to skid off.
Further, in one embodiment of the invention, as shown in figure 3, the system 10 of the embodiment of the present invention further include:
Sensor 700 and power amplifier 800.
Wherein, sensor 700 is located at the upper surface of upper flat plate 210, obtains the response letter of upper flat plate 210 for detecting
Number.Power amplifier 800 is for amplifying control signal.
It should be noted that sensor 700 can be a plurality of types of sensors, for example, acceleration transducer, displacement pass
Sensor etc., herein only as an example, being not specifically limited.The embodiment of the present invention can obtain not according to different types of sensor
Same corresponding signal, for example, sensor 700 can be acceleration transducer, then the response signal detected is acceleration letter
Number；For another example, sensor 700 can be displacement sensor, then the response signal detected is displacement signal.
Specifically, as shown in figure 3, the system 10 of the embodiment of the present invention picks up the response signal input of upper panel 210
Into controller 300, controller 300 obtains output quantity by intelligent control algorithm operation, and the voltage signal of output passes through power
Amplifier 800 amplifies driving piezoelectric actuator 220 later, to carry out vibration control.
The intelligent three-dimensional shock insulation and vibrating isolation system proposed according to embodiments of the present invention has the advantages that (1) to broadband
Ambient vibration inhibitory effect it is more preferable.Conventional three-dimensional shock insulation and vibration isolating suspension are all the passive vibration isolation technologies used, are a kind of narrow
The control of band, it cannot be adjusted according to the response of the spectral characteristic and structure itself of excitation, and control effect is by outer
Portion's condition significantly affects.The intelligent three-dimensional shock insulation and vibrating isolation system lead ambient vibration by piezoelectric intelligent vibration insulation
Dynamic control, can preferably be suitable for wide band ambient vibration.(2) installation space needed is small.The intelligent three-dimensional shock insulation with
With conventional three-dimensional shock insulation compared with the vertical vibration isolation layer of vibration isolating suspension, installation needs the piezoelectric intelligent vibration insulation that vibrating isolation system uses
The height wanted greatly reduces, and can effectively increase the space of building, and facilitate construction.
In the description of the present invention, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise clear
It is specific to limit.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (7)
1. a kind of intelligent three-dimensional shock insulation and vibrating isolation system characterized by comprising
Friction-pendulum shock-insulation support, the friction-pendulum shock-insulation support are made of lower slide curved slab, middle part plate and sliding block, are used for
The horizontal earthquake is isolated in horizontal earthquake for the system；
Piezoelectric intelligent vibration insulation, piezoelectric intelligent vibration insulation are made of upper flat plate, the middle part plate and multiple piezoelectric actuators,
The vertical motion is isolated in vertical motion for the system；And
Controller, the controller are used to generate control signal according to the response signal of the upper flat plate, and according to the control
Signal processed controls the multiple piezoelectric actuator vibration, to inhibit the vertical motion.
2. intelligent three-dimensional shock insulation according to claim 1 and vibrating isolation system, which is characterized in that the multiple piezoelectric actuator
It is carried out by binding material with the upper flat plate and the middle part plate be bonded.
3. intelligent three-dimensional shock insulation according to claim 1 and vibrating isolation system, which is characterized in that further include:
Sliding layer.
4. intelligent three-dimensional shock insulation according to claim 3 and vibrating isolation system, which is characterized in that the sliding block includes top shoe
And sliding block, the top shoe and the sliding block are oppositely arranged up and down, wherein the contact of the top shoe and the sliding block
It is coated on face on the predetermined fraction of the contact surface of the sliding layer or the top shoe and the sliding block and is wiped with the cunning
Dynamic layer.
5. intelligent three-dimensional shock insulation according to claim 4 and vibrating isolation system, which is characterized in that further include: top limit dress
It sets, the top limiting device is set at the lower surface of the middle part plate, is in described for limiting the top shoe of stating
Within limiting device；
Lower limit device, the lower limit device is set at the upper surface of the lower slide curved slab, for limiting
The sliding block of stating is within second limiting device.
6. intelligent three-dimensional shock insulation according to claim 1 and vibrating isolation system, which is characterized in that further include:
Sensor, the sensor are located at the upper surface of the upper flat plate, obtain the response of the upper flat plate for detecting
Signal.
7. intelligent three-dimensional shock insulation according to claim 1 and vibrating isolation system, which is characterized in that further include:
Power amplifier, for amplifying the control signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910079525.1A CN109854053A (en) | 2019-01-28 | 2019-01-28 | Intelligent three-dimensional shock insulation and vibrating isolation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910079525.1A CN109854053A (en) | 2019-01-28 | 2019-01-28 | Intelligent three-dimensional shock insulation and vibrating isolation system |
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| CN109854053A true CN109854053A (en) | 2019-06-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021548A (en) * | 2019-12-06 | 2020-04-17 | 清华大学 | Shock insulation support with self-detection function and self-detection method thereof |
| CN111140726A (en) * | 2020-02-17 | 2020-05-12 | 滨州学院 | Three-dimensional shock insulation pedestal |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
| WO2022079106A1 (en) * | 2020-10-13 | 2022-04-21 | Maurer Engineering Gmbh | Structural bearing for protecting structures against shocks |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010074179A (en) * | 2001-04-04 | 2001-08-04 | 박정근 | Multi-directional Seismic Isolation Devices |
| CN205383398U (en) * | 2016-01-03 | 2016-07-13 | 山东科技大学 | Three -dimensional isolation bearing of antidumping |
| CN106286692A (en) * | 2016-09-20 | 2017-01-04 | 华中科技大学 | A kind of six degree of freedom micro-vibration suppression platform and control method thereof |
| CN106381934A (en) * | 2016-10-26 | 2017-02-08 | 清华大学 | Three-dimensional shock insulation supporting seat |
| US20180195267A1 (en) * | 2015-07-20 | 2018-07-12 | Tensacciai S.R.L. | Sliding bearing for supporting civil or structural engineering works |
-
2019
- 2019-01-28 CN CN201910079525.1A patent/CN109854053A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010074179A (en) * | 2001-04-04 | 2001-08-04 | 박정근 | Multi-directional Seismic Isolation Devices |
| US20180195267A1 (en) * | 2015-07-20 | 2018-07-12 | Tensacciai S.R.L. | Sliding bearing for supporting civil or structural engineering works |
| CN205383398U (en) * | 2016-01-03 | 2016-07-13 | 山东科技大学 | Three -dimensional isolation bearing of antidumping |
| CN106286692A (en) * | 2016-09-20 | 2017-01-04 | 华中科技大学 | A kind of six degree of freedom micro-vibration suppression platform and control method thereof |
| CN106381934A (en) * | 2016-10-26 | 2017-02-08 | 清华大学 | Three-dimensional shock insulation supporting seat |
Non-Patent Citations (2)
| Title |
|---|
| 庄军生: "《桥梁减震、隔震支座和装置》", 30 April 2012 * |
| 黎明安: "《动力学控制基础与应用》", 31 January 2013 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021548A (en) * | 2019-12-06 | 2020-04-17 | 清华大学 | Shock insulation support with self-detection function and self-detection method thereof |
| CN111140726A (en) * | 2020-02-17 | 2020-05-12 | 滨州学院 | Three-dimensional shock insulation pedestal |
| WO2022079106A1 (en) * | 2020-10-13 | 2022-04-21 | Maurer Engineering Gmbh | Structural bearing for protecting structures against shocks |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
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Application publication date: 20190607 |