CN1415811A - Damper for runing dissipation of energy of electromagnetic eddy current - Google Patents
Damper for runing dissipation of energy of electromagnetic eddy current Download PDFInfo
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- CN1415811A CN1415811A CN 02137297 CN02137297A CN1415811A CN 1415811 A CN1415811 A CN 1415811A CN 02137297 CN02137297 CN 02137297 CN 02137297 A CN02137297 A CN 02137297A CN 1415811 A CN1415811 A CN 1415811A
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Abstract
This invention relates to electromagnetic eddy power tuning damper composed of TMD quality vibrator, electromagnet or permanent magnet and flexible units, in which the magnet has many rabbets, wires on adjacent rabbets are winded in different direxctions froming multiple magnetic fields with quality vibrator inserted. One end of flexible unit is linked to the quality vibrator, the other is fixed by the support. The said structures can be set on a same baseplate parallel to each other in opposite directions. This device can design the damper coefficient at the maximum reaching the maximujm resulting in anti-wind, anti-earthquake for high buildings and keeping stable for a longtime.
Description
Technical field
The invention belongs to the building construction technology field, be specifically related to a kind of damper for runing dissipation of energy of electromagnetic eddy current that can control the vibration of highrise building or tall and slender structure.
Background technology
In recent years, along with technological progress, use high-strength, light building material in a large number, building is built higher and higher, and structure is more and more gentleer, and the damping of structure is also in continuous reduction simultaneously.Under the dynamic load effect such as high wind, earthquake, high-rise, tall and slender structure can produce comparatively strong vibration, not only can allow the user not feel well, and also easily causes Psychological Panic, inefficacy and destruction that excessive vibration simultaneously also can cause building structure.In order to overcome the defective that design theory is brought, people begin to explore a kind of new theory and method, both structural vibration control method.
In traditional structure design, generally be by increasing the ability of resisting disasters such as wind, earthquake that structural strength, rigidity and ductility strengthen structure self.Structure control then is by controlling organization structurally is installed structure to be applied control, to alleviate owing to the caused structural vibration of external drive.
Structural vibration control can be divided into Passive Control, ACTIVE CONTROL and mixing and control three kinds.Passive Control is meant that under no external energy supply situation, control is when control device vibrates with structure or is out of shape, and causes the motion of device self or distortion and passive generation.ACTIVE CONTROL is to have under the external energy supply situation, control be control device by certain control law, utilize external energy initiatively to apply.Mixing control is exactly structurally to use Passive Control and ACTIVE CONTROL simultaneously, or uses master, the passive control device of more than a kind of mode simultaneously, can give full play to the strong point of various control forms and variety of way like this.
The Passive Control of structure does not need the energy, and principle and device are all fairly simple, implements than being easier to, and applicability, reliability are better, therefore use more in civil engineering.Passive Control can be divided into three classes such as energy-obsorbing and damping, basic vibration isolation, passive energy dissipation.Energy-obsorbing and damping is especially used morely in super highrise building in engineering practice, roughly can be divided into two classes:
1, tuned mass damper
Tuned mass damper (Tuned Mass Damper-TMD) is exactly an additional mass, spring, damper on major structure of construction top, forms a sub-vibrational system.After the TMD system has been installed on the former agent structure, dynamic Characteristics of Structure will have greatly changed.When bearing dynamic loading such as earthquake and high wind when structure, both can be by the interaction of TMD and main structure, realize energy from main structure to the transfer of TMD system and consumed, reach the purpose that reduces the main structure vibration.
2, Tuned Liquid
The application of Tuned Liquid (Tuned Liquid Damper-TLD) in structural vibration control starts from twentieth century eighties.It is utilize to adjust liquid condenser, and in the structural vibration process, the dynamic pressure difference that liquid produces the damper tank wall is used as structure control power, thereby reaches when earthquake or high wind, reduces the purpose of structural vibration.
TMD, TLD device have been used to the John Hancock mansion of boston, u.s.a at present, Citicorp building and Sydney, AUS Centerpoint TV transmission tower, Toronto TV transmission tower and the Japanese much wind of buildings in New York shakes or seismic response control.Also there are some TV transmission tower and building to adopt devices such as TMD, TLD to carry out structure control in China.Because device volumes such as TMD, TLD are generally very big, often to take very large space, therefore in the application of actual TLD, often utilize the part as device such as the existing water tank mechanical floor of building.
Theoretical research proves for TMD, has the TMD damped coefficient an of the best, and when the damper of TMD was adjusted at this value, building can obtain the most effective effectiveness in vibration suppression, is greater than or less than this value, and effectiveness in vibration suppression will be given a discount.For this reason, in engineering practice, all the parameter designing with damper gets and can adjust.And require parameter stable in long time, can guarantee that like this building also has the most effective effectiveness in vibration suppression in long time.
The TMD quality that designs, spring parameter will be realized on actual engineering, comparatively speaking also than being easier to.But realize the damper stable in a parameter is for a long time, that parameter is regulated again easily, just so not simple.Therefore the damper that designs a success often becomes the key of design TMD.The mode of the TMD damper of having used in existing engineering practice has multiple; Electro-hydraulic servo formula, Hydrautic damping etc.Wherein electro-hydraulic servo formula effect is fine, and damped coefficient is convenient adjustable, also more stable comparatively speaking, but involves great expense, and needs good M R.The damped coefficient of Hydrautic damping is subjected to temperature and the influence that oily quality changes in time, can not stablize in long-time, therefore can not obtain the effectiveness in vibration suppression of the best in for a long time.
Summary of the invention
The objective of the invention is to design the damper of a kind of TMD of being used for, make it simple and reliable for structure, with low cost, damping parameter is convenient adjustable, again can be reliable and stable for a long period of time.
The present invention program's principle is when utilizing metallic conductor to move in magnetic field, produces induced-current (eddy current) owing to having cut the magnetic line of force, produces the electromagnetic damping of practical application.As Fig. 1. shown in.When copper sheet or aluminium flake are suspended on electromagnet two interpolars, form a pendulum.If the coil in the electromagnet is energising not, two interpolars do not have magnetic field, and then pendulum will be through just stopping for a long time.If with magnet spool and power connection, two interpolars produce magnetic field, when the Movement in Magnetic Field of pendulum towards between electromagnet, pass the copper sheet of pendulum face owing to cut magnetic field, have produced induced-current in copper sheet.According to Lenz's law, faradic effect always hinders the motion of conductor between magnetic field.Therefore the motion of pendulum has been subjected to resistance.The kinergety of pendulum becomes heat energy and consumes, and pendulum also just stops very soon, and the resistance that claims this prevention pendular motion is an electromagnetic damping.
If the quality of TMD is linked to each other with some conductors in some way, and conductor places among the magnetic field, when the mass motion of TMD, quality also just is subjected to electromagnetic damping, the vibration of building is transformed into the kinetic energy of TMD quality and consumes fast with eddy current heat energy in motion conduct again, the vibration of building is decayed very soon.
According to above-mentioned principle, the damper that is used for TMD of the present invention's design is constituted by TMD quality oscillator (m of TMD), electromagnet or permanent magnet (c of TMD), various forms of elastic body (k of TMD).Wherein the quality oscillator is made up of the multi-disc conductor material, and the quality proton inserts in the magnetic field of electromagnet or permanent magnet, and its other end is connected with an elastomeric end, and the elastomeric other end is fixed by bearing, its structure such as Fig. 2, Fig. 5 and shown in Figure 6.
Among the present invention, electromagnet adopts multiple-overlay structure, form a plurality of notches (magnetic pole), having mercy on of adjacent notch (magnetic pole) upper conductor to difference, thereby form a plurality of magnetic fields at notch (pole shoe), a plurality of conductor materials of quality oscillator are at intermediary movements, and heating is consumed energy, form a damping device (c of TMD), see Fig. 2 and shown in Figure 4.The number of notch can be determined according to the size of the damping force of setting, is generally more than 2, and for example 2-20, even can be more.
Among the present invention, quality oscillator (m) is the structure of a plurality of fork-shapeds, and a plurality of notch couplings of this fork-shaped and magnet, so that embed wherein, sees shown in Figure 3.
Among the present invention, elastic body (k) can adopt the steel bar of a square-section or the spring of other form.
Among the present invention, quality oscillator (m), elastic body (k) and electromagnet or permanent magnet damping device (c) are installed on the iron bottom plate.For the quality oscillator that makes TMD mechanism can not form the rocking vibration of base plate when the vibration, one group of identical mechanism aside is set in addition, two groups of mechanisms direction that is parallel to each other is opposite.The latter is the same with the former TMD mechanism, plays a part damping vibration attenuation, simultaneously also with original TMD mechanism complementation, prevented shaking of base plate.
Because the present invention is according to the design of electromagnetic eddy power consumption principle.So be called damper for runing dissipation of energy of electromagnetic eddy current.Damper by the present invention's design is installed on the model of a steel work, and has carried out the test of the vibroplatform of simulated earthquake.Model experiment results shows: antivibration and wind resistance effect that electromagnetic energy-consumption damper TMD is used for highrise building or tall and slender structure are obvious.
Advantage of the present invention is as follows:
1, because the electric current in the electromagnet coil can be adjustable continuously by changing voltage or changing resistance, so the size in magnetic field and eddy current just can obtain adjustment easily.Be that damped coefficient can be set within a large range, and can be set in optimum value.Thereby make high-rise building wind resistant, antidetonation reach optimum efficiency.
In case after 2 dampers were installed and adjusted, because the physical characteristic of conductor material, conductor material and magnetic material, were not what variation again decades; And that parameters such as electric current will keep is stable, be not difficult matter, so the time stability of damped coefficient is fine, can realize that decades are constant.Thereby the best effectiveness in vibration suppression that has guaranteed this TMD remains unchanged for a long time.
3, simple and reliable for structure, easily to make, cost is low.Because good stability does not have the transmission mechanism of what complexity again, so almost there is not what maintenance.Compare with the TMD that adopts hydraulic damper, electro-hydraulic servo damper, saved a lot of manpowers and expense.
4, because simple in structure, easily manufactured, product can be realized seriation, standardization.Highrise building and tall and slender structure can utilize unused space size to select the TMD product that varies in size for use, realize the TMD of colony oscillation damping method, having overcome some TMD method (electro-hydraulic servo TMD) must take very large tracts of land of flooring at high level, thereby reduces the deficiency of the usable floor area of building.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is the damping device structural diagrams.
Fig. 3 is quality minor structure diagram of the present invention.
Fig. 4 illustrates for electromagnet structure of the present invention.
Fig. 5 is apparatus of the present invention structural plan diagram.
Fig. 6 is apparatus of the present invention structure facade diagram.
Number in the figure: 1 is magnet, and 2 is coil, and 3 is the quality oscillator, and 4 is elastic body, and 5 is bearing, and 6 is base plate, and 7 is power supply.
The specific embodiment
The invention is further illustrated by the following examples.
Embodiment: the quality oscillator adopts the aluminum fin to make, and is of a size of 80 * 60 * 80, in its planar ends, the bearing 5 that connects elasticity steel pole 4 is installed.
The electromagnet permeability magnetic material adopts the A3 steel, is of a size of 80 * 80 * 110, and 5 notches are arranged, and diameter is that enamel-covered wire multi-turn coiling in notch of 1mm is made.
Elasticity steel pole 4 adopts the mild steel material of square-section, and sectional dimension is 50 * 5, and length is about 400, and one is connected on the quality oscillator, and one is fixed on the bearing.
Above quality oscillator, electromagnet, elasticity steel pole are assembled into a cover TMD device by Fig. 6.Make two covers altogether, by different orientation (see figure 5)s, on the steel sole plate that to be installed in one 600 * 300 thickness be 5mm is white.Two cover magnet spool series connection are by DC power supply.
A whole set of TMD device is installed in one 1.5 meters, and on the steel work shelf that is connected into by light section, whole steelframe is installed in and has done the test of simulating multiple earthquake on the vibroplatform together with the TMD device.Evidence; The effectiveness in vibration suppression of acceleration reaches 30%--70%.
Claims (4)
1, a kind of damper for runing dissipation of energy of electromagnetic eddy current, constitute by TMD quality oscillator, electromagnet or permanent magnet, elastic body combination, it is characterized in that quality oscillator (3) is made up of the multi-disc conductor material, quality oscillator (3) inserts in the magnetic field of electromagnet or permanent magnet, its other end is connected with an end of elastic body (4), and the other end of elastic body (4) is fixing by bearing (5).
2, damper according to claim 1 is characterized in that electromagnet adopts a multiple overlay structure, forms a plurality of notches, adjacent notch upper conductor around to difference, thereby form a plurality of magnetic fields; A plurality of conductor materials of quality oscillator form a damping device at intermediary movements.
3, damper according to claim 1 is characterized in that elastic body adopts the steel bar or the other forms of spring of square-section.
4, according to claim 1 or 2 or 3 described dampers, it is characterized in that 2 groups of quality oscillators (3), elastic body (4), electromagnet or permanent magnet are installed on the iron bottom plate (6), 2 groups of mechanisms are parallel to each other, and direction is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021372977A CN1187504C (en) | 2002-09-30 | 2002-09-30 | Damper for runing dissipation of energy of electromagnetic eddy current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021372977A CN1187504C (en) | 2002-09-30 | 2002-09-30 | Damper for runing dissipation of energy of electromagnetic eddy current |
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| Publication Number | Publication Date |
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| CN1415811A true CN1415811A (en) | 2003-05-07 |
| CN1187504C CN1187504C (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021372977A Expired - Fee Related CN1187504C (en) | 2002-09-30 | 2002-09-30 | Damper for runing dissipation of energy of electromagnetic eddy current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889380A (en) * | 2016-06-13 | 2016-08-24 | 北京航空航天大学 | Electric-eddy-current rotation-transformation rigidity damper |
| CN106015420A (en) * | 2016-08-08 | 2016-10-12 | 河海大学 | Semi-active vibration control eddy current damper |
| CN110259239A (en) * | 2019-06-19 | 2019-09-20 | 同济大学 | System identification technique and self compensation tuned mass damper |
| CN112796558A (en) * | 2021-02-01 | 2021-05-14 | 大连理工大学 | Interlayer shearing amplification type eddy current damper |
-
2002
- 2002-09-30 CN CNB021372977A patent/CN1187504C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889380A (en) * | 2016-06-13 | 2016-08-24 | 北京航空航天大学 | Electric-eddy-current rotation-transformation rigidity damper |
| CN105889380B (en) * | 2016-06-13 | 2017-10-31 | 北京航空航天大学 | A kind of current vortex rotates variation rigidity damper |
| CN106015420A (en) * | 2016-08-08 | 2016-10-12 | 河海大学 | Semi-active vibration control eddy current damper |
| CN106015420B (en) * | 2016-08-08 | 2018-05-11 | 河海大学 | A kind of semi-active type vibration control eddy current damper |
| CN110259239A (en) * | 2019-06-19 | 2019-09-20 | 同济大学 | System identification technique and self compensation tuned mass damper |
| CN112796558A (en) * | 2021-02-01 | 2021-05-14 | 大连理工大学 | Interlayer shearing amplification type eddy current damper |
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| Publication number | Publication date |
|---|---|
| CN1187504C (en) | 2005-02-02 |
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