CN102277910A - Magneto rheological energy-dissipating and shock-absorbing device based on piezoelectric self energy collection - Google Patents
Magneto rheological energy-dissipating and shock-absorbing device based on piezoelectric self energy collection Download PDFInfo
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- CN102277910A CN102277910A CN2011101118219A CN201110111821A CN102277910A CN 102277910 A CN102277910 A CN 102277910A CN 2011101118219 A CN2011101118219 A CN 2011101118219A CN 201110111821 A CN201110111821 A CN 201110111821A CN 102277910 A CN102277910 A CN 102277910A
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Abstract
The invention discloses a magneto rheological energy-dissipating and shock-absorbing device based on piezoelectric self energy collection, relating to an energy-dissipating and shock-absorbing device of a building and solving the problem of unreliability increase of the traditional magneto rheological energy-dissipating and shock-absorbing device based on a sensor and a control power supply due to complex structure. The magneto rheological energy-dissipating and shock-absorbing device comprises a magneto rheological damper connected between building members needing shock absorption, and also comprises a piezoelectric generation device, wherein the piezoelectric generation device generates electric energy which enables a damping force generated by the magneto rheological damper to dissipate energy, the current output end of the piezoelectric generation device is connected to the current input end of the magneto rheological damper, the piezoelectric generation device and the magneto rheological damper are connected between members capable of generating relative displacement or relative speed in the energy-dissipating and shock-absorbing device, earthquake causes relative displacement between connecting members at two ends of the piezoelectric generation device, electric energy is generated by applying action forces on two ends of the piezoelectric generation device so as to be supplied to the magneto rheological damper for generating the damping force, therefore, the magneto rheological energy-dissipating and shock-absorbing device dissipates the energy in relative motion of a cylinder body and a piston rod of the device, and is used in an earthquake proof building.
Description
Technical field
The present invention relates to the energy-consuming shock absorber of building.
Background technology
The energy-dissipating and shock-absorbing technology is meant that some position in building structure (as between support, shear wall, node, connection seam or connector, floor space, adjacent architectural, between the major-minor structure etc.) is provided with sinker, relative deformation and relative displacement by sinker provide additional damping, to consume earthquake (or the wind shakes) energy of input structure, reduce agent structure vibration reaction, avoid occurring obvious elastic-plastic deformation, guarantee to build safety and normal usability under macroseism or high wind effect.
Compare with traditional earthquake resistant structure, the energy-dissipating and shock-absorbing structural seismic response reduces 40%-50%, saves structural cost 5%-10%, can save the reinforcing expense about 60% of transforming.Both be applicable to new construction, also be applicable to the strengthening reconstruction of existing building; Both be applicable to the common building structure, also be applicable to the antidetonation lifeline engineering.With headed by the U.S., the Japan, existing more than 20 country carries out cushion technique research, and thousands of practical application engineering of existing hundreds of at present.The U.S., Russia and Japan have put into effect energy-dissipating and shock-absorbing structure design job specfication or rules, and China has also increased related content in earthquake resistant design code in recent years.
In the energy-dissipating and shock-absorbing structure, sinker can carry out the difference classification according to material, mechanism of energy dissipation and structure.Wherein, can be divided into metal sinker, viscoplasticity sinker, viscous sinker and intellectual material sinker (electric current change, MR damper, memory alloy damper) according to the energy dissipating material.
MR damper is based on the magnetic rheology effect of magnetic flow liquid and makes.Liquid in the damper (magnetic flow liquid) mainly is made up of non-magnetic liquid (as water or oil) and the small soft magnetic particles (as carbonyl iron particles) that is dispersed in wherein high magnetic permeability, low magnetic hysteresis.Under the externally-applied magnetic field effect, significant variation (viscosity increase, yield stress increase) can take place in the magnetic flow liquid flow behavior, shows as the class solid property; When the magnetic field effect was removed, its performance reverted to good flowability again rapidly, as Fig. 2, shown in Figure 3.
MR damper,, exert oneself big, low-power consumption demand big because of its damping force adjustable extent, characteristics such as be swift in response show very big advantage in half ACTIVE CONTROL.In half ACTIVE CONTROL, need by sensor acquisition speed or displacement signal, calculate according to the ACTIVE CONTROL algorithm and determine optimum control power, according to the MR damper structural parameters, the inverse electric current is also applied by the control power supply, makes the control of damper as far as possible near optimum control power initiatively.Damper real work principle, as shown in Figure 7: damper is at each electric current (I
0～I
Max) exerting oneself and be the linear function of speed under the effect, as each bar parallel lines among Fig. 7, at work, by calculating and can making damping force value on different parallel lines by the electric current that the control power supply applies, thereby near active optimum control power, reach the control effect as far as possible.
The existing problem that exists based on the magnetorheological energy-consuming shock absorber of sensor and control power supply is: in the work period, power supply and sensor need casual inspection to change, increased unnecessary man power and material and consumed, and therefore the whole service life of device also shortens; In control, need be according to the speed of sensor acquisition, the size and Orientation of displacement, by the size of arithmetic unit control algolithm judgement optimum control power and then controlled electric current, finally by control power supply output control, because of its complex structure increases the device unreliability.
Summary of the invention
The present invention is in order to solve existing magnetorheological energy-consuming shock absorber based on sensor and control power supply, because of its complex structure increases the problem of device unreliability, to propose a kind of based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting.
Based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting, it comprises the MR damper that is connected between the building unit that needs damping, it also comprises piezoelectric generating device, piezoelectric generating device produces electric energy, the damping force dissipation energy that electric energy produces MR damper, the current output terminal of piezoelectric generating device is connected the current input terminal of MR damper.
The contrast of two kinds of magnetorheological energy-consuming shock absorbers:
For making full use of MR damper, reach better control effect, the present invention utilizes the piezo-electric generating technology to power for MR damper.The piezoelectric good endurance, the energy density height can guarantee damper safety and stability power supply needs; Than magnetorheological energy-consuming shock absorber based on sensor and control power supply, need not get final product work based on piezoelectricity from the magnetorheological energy-consuming shock absorber of energy collecting with parts such as sensor and control power supplys, structure is simple relatively, has higher reliability; Piezoelectric generating device is converted into electric energy with the vibrational energy in the earthquake, can guarantee also to have made full use of seismic energy into the damper power supply, realizes having adaptivity and intelligent with the shake of shake system.
Description of drawings
Fig. 1 is a structural representation of the present invention, Fig. 2 is the magnetorheological schematic diagram that does not add magnetic field of the present invention, Fig. 3 is the magnetorheological schematic diagram that adds magnetic field of the present invention, Fig. 4 is the structural representation of piezoelectric pile of the present invention (Piezoelectric stack) TRT, Fig. 5 is the structural representation of semi girder TRT of the present invention, Fig. 6 is the array schematic diagram of semi girder TRT of the present invention, Fig. 7 is a MR damper operating principle curve map, curve is a target damping force curve among the figure, Fig. 8 is the structural representation of shearing-type piezoelectric generating device of the present invention, and Fig. 9 is the array structure schematic diagram of piezoelectric pile structure of the present invention and shearing-type piezoelectric generating device.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment comprises the MR damper 1 that is connected between the building unit that needs damping, it also comprises piezoelectric generating device 2, piezoelectric generating device 2 produces electric energy, the damping force dissipation energy that electric energy produces MR damper 1, the current output terminal of piezoelectric generating device 2 is connected the current input terminal of MR damper 1.Supporting members such as diagonal brace by rigidity is provided of piezoelectric generating device 2 and MR damper 1, body of wall, beam are connected between the member that can produce relative displacement or relative velocity in the energy-consuming shock absorber, earthquake or wind are bestirred oneself with the relative displacement that causes between the piezoelectric generating device 2 two ends connecting elementss, the device two ends are applied active force and produce electric energy, and supply MR damper 1, make MR damper 1 produce damping force, thus in the relative motion of self piston rod and cylinder body dissipation energy.
Intelligent damper, as MR damper 1, adjustable damping amount in can providing in a big way, with its exert oneself greatly, low-power consumption demand, characteristics such as be swift in response, show very big advantage; For making full use of MR damper 1, reach better control effect, the present invention utilizes the piezo-electric generating technology to be MR damper 1 power supply, the piezoelectric good endurance, the energy density height has higher safety factor; Piezoelectric generating device 2 is converted into electric energy with the vibrational energy in the earthquake, can guarantee also to have made full use of seismic energy into MR damper 1 power supply, realizes with the shake of shake system; Piezoelectric generating device 2 is in earthquake, can be according to size that is applied to the power on the device and speed, produce the electric energy of different sizes, promptly " shake big electric energy greatly; the little electric energy of little shake ", and the damping force that MR damper provides in earthquake also will satisfy the requirement of " big shake is exerted oneself greatly; little shake is exerted oneself for a short time ", adjustment collocation by Reasonable Parameters, can realize that sensing and energy supply are two-in-one in the piezoelectricity electric supply installation, the size that a whole set of magnetorheological control device can shake according to earthquake or wind, self adaptation is regulated the damper size of exerting oneself, forgone sensor and add control power supply cause unpredictable interference and low reliability, realized the adaptivity and the intellectuality of a whole set of control system.
The specific embodiment two: in conjunction with Fig. 4, Fig. 9 present embodiment is described, the piezoelectric generating device 2 of present embodiment adopts the piezoelectric pile structure.Other composition is identical with embodiment one with annexation.
The piezoelectric pile structure adopt piezoelectricity sheet material 3 and electrode 4 alternately interlayer arrange that principle is to utilize the d33 pattern of piezoelectric, when the structure two ends apply external force, cause the distortion of piezoelectricity sheet material and produce voltage.Because the single layer structure generated energy is low, thus adopt multi-layer piezoelectric sheet material and electrode to mix stack and constitute the piezoelectric pile structure, and adopt the array of piezoelectric pile in practice, generated energy is increased substantially.
The specific embodiment three: in conjunction with Fig. 5, Fig. 6 present embodiment is described, what present embodiment and embodiment two were different is that piezoelectric generating device 2 adopts cantilever beam structures.Other composition is identical with embodiment one with annexation.
In the cantilever beam structures, in matrix 6 both sides, all arrange the multi-layer film structure 8 that piezoelectric membrane and electrode interlayer are laid, when building structure is moved in earthquake, exciting sheet 5 promotes matrix 6 makes Piezoelectric Cantilever Beams produce initial displacement, the free oscillation of this distortion and mass 7 generations has subsequently caused that the membrane structure 8 of cantilever surface coverage produces electric energy.Because single cantilever beam structures generated energy is not enough to supply with MR damper, so adopt the cantilever beam structures array structure in practice, as shown in Figure 6, can increase generated energy.
The specific embodiment four: in conjunction with Fig. 8, Fig. 9 present embodiment is described, what present embodiment and embodiment two were different is that piezoelectric generating device 2 adopts shearing-type piezo-electric generating structures.Other composition is identical with embodiment one with annexation.
Piezo-electric device is formed identical with the piezoelectric pile structure, and just force way is a shearing force, and in actual applications, also adopts array structure.
Claims (4)
1. based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting, it comprises the MR damper (1) that is connected between the building unit that needs damping, it is characterized in that it also comprises piezoelectric generating device (2), piezoelectric generating device (2) produces electric energy, the damping force dissipation energy that electric energy produces MR damper (1), the current output terminal of piezoelectric generating device (2) is connected the current input terminal of MR damper (1).
2. described based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting according to claim 1, it is characterized in that piezoelectric generating device (2) adopts the piezoelectric pile structure.
3. according to claim 1 or 2 described, it is characterized in that piezoelectric generating device (2) adopts cantilever beam structures based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting.
4. according to claim 1 or 2 described, it is characterized in that piezoelectric generating device (2) adopts shearing-type piezo-electric generating structure based on the magnetorheological energy-consuming shock absorber of piezoelectricity from energy collecting.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855736A (en) * | 2012-09-03 | 2013-01-02 | 中国科学院电工研究所 | Earthquake early warning system capable of capturing earthquake vibration energy and being self-powered |
| CN104631646A (en) * | 2015-01-12 | 2015-05-20 | 上海上材减振科技有限公司 | Viscous damper with pressure energy power generation |
| CN105113653A (en) * | 2015-08-25 | 2015-12-02 | 郑州大学 | Novel energy dissipation and seismic mitigation device MRE-BRB |
| JP2017193905A (en) * | 2016-04-22 | 2017-10-26 | 株式会社免制震ディバイス | Vibration suppressor for structure |
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| JP2007239982A (en) * | 2006-02-09 | 2007-09-20 | Central Res Inst Of Electric Power Ind | Magnetorheological fluid damper |
| CN101086179A (en) * | 2007-01-24 | 2007-12-12 | 湖南大学 | Self-power-supply magnetorheological intelligent vibration damping device |
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| KR20100007252A (en) * | 2008-07-11 | 2010-01-22 | 한국과학기술원 | Smart mr(magnetorheological fluid) damper using piezoelectric material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102855736A (en) * | 2012-09-03 | 2013-01-02 | 中国科学院电工研究所 | Earthquake early warning system capable of capturing earthquake vibration energy and being self-powered |
| CN102855736B (en) * | 2012-09-03 | 2014-06-04 | 中国科学院电工研究所 | Earthquake early warning system capable of capturing earthquake vibration energy and being self-powered |
| CN104631646A (en) * | 2015-01-12 | 2015-05-20 | 上海上材减振科技有限公司 | Viscous damper with pressure energy power generation |
| CN105113653A (en) * | 2015-08-25 | 2015-12-02 | 郑州大学 | Novel energy dissipation and seismic mitigation device MRE-BRB |
| JP2017193905A (en) * | 2016-04-22 | 2017-10-26 | 株式会社免制震ディバイス | Vibration suppressor for structure |
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