CN205259388U - Nonlinearity dynamic vibration absorber electromagnetism power consumption device - Google Patents
Nonlinearity dynamic vibration absorber electromagnetism power consumption device Download PDFInfo
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- CN205259388U CN205259388U CN201520917424.4U CN201520917424U CN205259388U CN 205259388 U CN205259388 U CN 205259388U CN 201520917424 U CN201520917424 U CN 201520917424U CN 205259388 U CN205259388 U CN 205259388U
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- linear dynamic
- absorbing electromagnetic
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Abstract
The utility model discloses a nonlinearity dynamic vibration absorber electromagnetism power consumption device, the multimedia advertisement box comprises a box body, form even magnetic field between the top surface of box and the bottom surface, and the spring pendulum that links to each other with the top surface of box is installed to the vertically in magnetic field, spring pendulum can be in magnetic field along a plurality of direction swing back and forth, its motion mode for the spring vibration with wholly swing two kinds of modal couplings. In satisfying during resonance condition, a vibration can take place arouse another kind of the vibration to it inhales the effect of shaking to reach the nonlinearity. Spring swing frequency is unanimous with the master oscillator frequenc of being controlled the structure, the vibration mode and the strong coupling of swing mode of spring pendulum, and resonance characteristic in realizing reaches the optimalizing damping effect of shaking of inhaling.
Description
Technical field
The utility model relates to Structural Engineering vibration control field, relates in particular to a kind of non-linear dynamic absorbing electromagnetic energy-consumption device that reduces the tower structure vibratory responses such as power transmission tower.
Background technology
China is the country that natural calamity takes place frequently, and the tower structures such as power transmission tower collapse under earthquake or wind action happens occasionally, and has caused huge economic loss. Therefore, reduce the dynamic response of the tower structures such as power transmission tower, guarantee its safe operation under earthquake or wind action, there is very great meaning. Structural vibration control is exactly by some control device are structurally set, thereby improves the mechanical property of structure. In the time that structure is subject to wind load, geological process equal excitation, these control device will, to one group of passive or control initiatively of structure generation, make the reaction of structure be able to remarkable reduction. Structure control is a kind of brand-new aggressive method that is different from traditional structural design method, it has changed the thought of utilizing load-carrying members itself to resist lateral load, by the theory of application structure control, can significantly improve the bearing capacity of structure, reduce the weight of structure, ensureing that structure meets security, is the once leap of structural design thought.
For solving the vibration damping problem of engineering structure, Chinese scholars has been carried out a large amount of research to vibration damping control technology, has obtained a series of achievement in research. Passive Control can be divided into passive energy dissipation and absorbing vibration damping two classes. Wherein, passive energy dissipation technology is that energy-consumption damper is structurally installed, thereby the vibrational energy of dissipative structure is to reach the object of vibration damping. Absorbing damping technology is installed minor structure conventionally at Transmission Tower top, as tuned mass damper (TMD), Tuned Liquid (TLD) or Suspended mass pendulum (SMP). By regulating the frequency of minor structure, the fundamental frequency of minor structure and main structure is coincide. When works is subject to dynamic excitation when vibration, minor structure can absorb kinetic energy from works, and produces that frequency equates, the inertia force of opposite direction, thereby reduces the vibration of works. The application of linear power bump leveller has had long history, if Forced Frequency immobilizes, adopts linear power bump leveller, and can accomplish to make main amplitude is zero, and shock attenuation result reaches best perfect condition. If excited frequency slight change, may make operating frequency approach arbitrary resonance point from antiresonance point skew, so linear bump leveller is not suitable for the situation of speed change. Therefore, the utility model, in conjunction with the non-linear dynamic absorbing of Spring Pendulum and the feature of electromagnetic energy-consumption, proposes non-linear dynamic absorbing electromagnetic energy-consumption device.
Utility model content
The purpose of this utility model is that the vibration to this structure under earthquake or wind action is controlled for the tower structures such as power transmission tower provide a kind of non-linear dynamic absorbing electromagnetic energy-consumption device.
For achieving the above object, the utility model adopts following technical proposals:
Non-linear dynamic absorbing electromagnetic energy-consumption device, comprise a casing, between the end face of described casing and bottom surface, form uniform magnetic field, and the vertical Spring Pendulum being connected with the end face of casing that is provided with in magnetic field, described Spring Pendulum can swing back and forth along multiple directions in magnetic field, and its motion mode is the coupling of spring vibration and two kinds of mode of Integral swinging, in the time meeting internal resonance condition, can there is the another kind of vibration of a kind of vibrational excitation, thereby reach the effect of non-linear absorbing. Described Spring Pendulum dynamic frequency be consistent by the master oscillator frequenc of control structure, the mode of oscillation of Spring Pendulum with swing mode strong coupling, realize internal resonance characteristic, to reach optimum absorbing effectiveness in vibration suppression. In addition, in mass swing process, cutting magnetic induction line forms closed-loop path, and eddy current can be converted into resistance heat and dissipate, and can reach good energy consumption effect.
A permanent magnet is respectively set in the above and below of casing and forms the uniform magnetic field to S by N from top to bottom.
Described magnetic field forms by a permanent magnet is respectively set in the above and below of casing.
Described elastic device comprises a spring resilient strand through spring vertical with.
Described spring adopts martensite marmem High Damping Spring; this alloy has the characteristic of high damping; a resilient strand is set in the middle of spring; described resilient strand adopts austenite shape memory alloy super-elasticity twisted wire; this alloy has super-elasticity self-resetting capability; be used in conjunction with spring, in the situation that spring damages, can play the effect of quality of protection piece.
Described mass is the fence type combination block that is wrapped with the austenitic stainless steel of aluminium sheet, and this stainless steel magnetic conductivity is little, be difficult for by attraction, and aluminium electric conductivity is strong, produces eddy current large, perfect heat-dissipating.
The length of described spring determines according to the basic frequency of main structure.
Spring Pendulum is made up of the mass of spring and suspension, and spring rate is ks, the former length of spring is lori, the length under Action of Gravity Field is l0, mass weight is mp. Relation is as follows:
lori＝l0-mpg/ks(1)
According to the relation of single pendulum pendulum length and frequency, can determine the pendulum length of Suspended mass pendulum, and then obtain Spring Pendulum pendulum length and also can calculate according to this formula:
In formula, f is the fundamental frequency of main structure, l0The length of Spring Pendulum under Action of Gravity Field, the former long l of Spring PendulumoriNeed to calculate according to formula (1).
The rigidity of described spring determines according to the original length of the quality of mass and spring.
Described magnet is strong permanent magnetic iron, lays respectively at the top and bottom position of box-structure.
Described non-linear dynamic absorbing electromagnetic energy-consumption device is arranged on the top of tower structure.
The hunting frequency of described Spring Pendulum be consistent by the master oscillator frequenc of control structure.
The beneficial effects of the utility model are:
(1) non-linear dynamic absorbing electromagnetic energy-consumption device of the present utility model is a kind of strongly non-linear system, by Spring Pendulum internal resonance, the energy that swings mode can be delivered to mode of oscillation, thereby absorb more kinetic energy, effectiveness in vibration suppression is remarkable, and without the input of external energy, more easily realization and security are higher;
(2) the utility model is based on electromagnetic induction principle, and by mass cutting magnetic induction line, metallic plate inside forms closed-loop path, and mechanical energy is converted into heat energy and consumes, and increases the power consumption of vibration absorber;
(3) this device medi-spring adopts martensite shape memory alloy material, improve the high damping properties of spring, in the middle of spring, be installed with austenite shape memory alloy twisted wire, there is super-elasticity self-resetting capability, coordinate spring to use, spring is played to the effect of protection;
(4) simple, the simple structure of this principle of device, and spring and mass are absolute construction, have the features such as easy to process, easy to maintenance;
(5) this device can reduce the vibratory response of multiple directions under earthquake or wind action, applicable to power transmission tower and relevant tower structure, can produce good economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is non-linear dynamic absorbing electromagnetic energy-consumption device schematic diagram.
Fig. 2 is non-linear dynamic absorbing electromagnetic energy-consumption device top view.
Fig. 3 is non-linear dynamic absorbing electromagnetic energy-consumption device Spring Pendulum schematic diagram.
Fig. 4 is non-linear dynamic absorbing electromagnetic energy-consumption device installation site schematic diagram.
Fig. 5 is the partial enlarged drawing of Fig. 4.
In figure: 1 shape memory alloy spring, 2 masses, 3 shape memory alloy twisted wires, 4 magnet, 5 outer containers.
Detailed description of the invention
Describe the embodiment of the utility model the best in detail below in conjunction with technical scheme and accompanying drawing.
In recent years, target energy transport phenomenon (TargetedEnergyTransfer, TET) and the non-linear dynamic shock-absorbing means such as nonlinear energy trap (NonlinearEnergySink, NES) obtained some application in passive vibration control field. TET refers to that a certain amount of energy is unidirectional, non-linearly pass to local vibration mode, thereby reduces the phenomenon of main structure vibration. NES is the non-linear bump leveller that can realize TET. Than conventional linear bump leveller, it has absorbing bandwidth, the advantage that absorbing efficiency is high.
Spring Pendulum is a kind of strongly non-linear system, and its motion mode is the coupling of spring vibration and two kinds of mode of Integral swinging. In the time meeting internal resonance condition, can there is the phenomenon of the another kind of vibration of a kind of vibrational excitation, be called internal resonance phenomenon. Its this specific character can be used for realizing nonlinear energy trap (NES). Based on above present situation, the utility model intends utilizing the internal resonance characteristic of Spring Pendulum, proposes a kind of novel NES, and can reduce the vibratory response of tower structure. In addition, based on electromagnetic induction principle, pendulum is cutting magnetic field in swing process, produces induced-current (eddy current); According to Lenz's law, the effect of induced-current (eddy current) always hinders the motion of conductor between magnetic field, and therefore the motion of pendulum has been subject to resistance, and the eddy current of generation is converted into resistance heat, the kinergety of pendulum becomes heat energy and consumes, and increases the power consumption of vibration absorber. Therefore, the utility model is in conjunction with the non-linear dynamic absorbing of Spring Pendulum and the feature of electromagnetic energy-consumption, proposes non-linear dynamic absorbing electromagnetic energy-consumption device, specifically as shown in Figure 1, Figure 2 and Figure 3. Described damping control device comprises that 3, one masses 2 of 1, shape memory alloy twisted wire of 5, one shape memory alloy springs of a box-structure and two magnet 4 form. This device is arranged on the top of tower structure.
Concrete structure is as follows:
The top and bottom of outer container 5 is fixed respectively a magnet 4, forms uniform magnetic field, and shape memory alloy spring 1 upper end connects magnet 4 bottoms, lower end quality of connection piece 2, and shape memory alloy twisted wire 3 is set in the middle of spring, mass 2 can multiple directions swing.
Spring 1 and mass 2 form Spring Pendulum, and its motion mode is the coupling of spring vibration and two kinds of mode of Integral swinging, in the time meeting internal resonance condition, the another kind of vibration of a kind of vibrational excitation can occur, thereby reach the effect of non-linear absorbing. Spring Pendulum dynamic frequency be consistent by the master oscillator frequenc of control structure, the mode of oscillation of Spring Pendulum with swing mode strong coupling, realize internal resonance characteristic, to reach optimum absorbing effectiveness in vibration suppression. In addition, in mass swing process, cutting magnetic induction line forms closed-loop path, and eddy current can be converted into resistance heat and dissipate, and can reach good energy consumption effect.
Spring adopts martensite marmem High Damping Spring; this alloy has the characteristic of high damping; a resilient strand is set in the middle of spring; resilient strand adopts austenite shape memory alloy super-elasticity twisted wire; this alloy has super-elasticity self-resetting capability; be used in conjunction with spring, in the situation that spring damages, can play the effect of quality of protection piece.
Mass is the fence type combination block that is wrapped with the austenitic stainless steel of aluminium sheet, and this stainless steel magnetic conductivity is little, be difficult for by attraction, and aluminium electric conductivity is strong, produces eddy current large, perfect heat-dissipating.
The length of spring determines according to the basic frequency of main structure.
Spring Pendulum is made up of the mass of spring and suspension, and spring rate is ks, the former length of spring is lori, the length under Action of Gravity Field is l0, mass weight is mp. Relation is as follows:
lori＝l0-mpg/ks(1)
According to the relation of single pendulum pendulum length and frequency, can determine the pendulum length of Suspended mass pendulum, and then obtain Spring Pendulum pendulum length and also can calculate according to this formula:
In formula, f is the fundamental frequency of main structure, l0The length of Spring Pendulum under Action of Gravity Field, the former long l of Spring PendulumoriNeed to calculate according to formula (1).
The rigidity of spring determines according to the original length of the quality of mass and spring.
Magnet is strong permanent magnetic iron, lays respectively at the top and bottom position of box-structure.
The hunting frequency of Spring Pendulum be consistent by the master oscillator frequenc of control structure.
In order to reach best effectiveness in vibration suppression, in the present embodiment, it should be noted that: the first, reasonably select the length of mass quality and spring, make the hunting frequency of mass with approaching as far as possible by control structure master oscillator frequenc; The second, choose reasonable spring rate, makes vibration frequency and hunting frequency produce resonance, to reach optimum absorbing effectiveness in vibration suppression; Three, select shape memory alloy material, structural behaviour is optimized, then better reach vibration damping control; Four, the area of choose reasonable mass cutting magnetic induction line, to reach optimum energy consumption effect; Five, displacement response maximum when this device should be arranged on structural vibration, to reach best effectiveness in vibration suppression.
The utility model is by the spring vibration of Spring Pendulum and the motion mode of two kinds of modal coupling of Integral swinging, realize internal resonance characteristic, the vibratory response of comprehensive reduction tower structure, reach the object of dynamic absorber, and apply electromagnetic energy-consumption device and consume the vibrational energy of structure, thereby reach optimum absorbing effectiveness in vibration suppression.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection domain of the present utility model.
Claims (10)
1. non-linear dynamic absorbing electromagnetic energy-consumption device, is characterized in that: comprise a casing, described casingBetween end face and bottom surface, form uniform magnetic field, and vertical being provided with is connected with the end face of casing in magnetic fieldSpring Pendulum, described Spring Pendulum can swing back and forth along multiple directions in magnetic field, and its motion mode is spring vibrationCoupling with two kinds of mode of Integral swinging.
2. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 1, is characterized in that: at casingAbove and below in permanent magnet be respectively set form the uniform magnetic field to S by N from top to bottom.
3. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 1, is characterized in that: described inSpring Pendulum comprise a spring, one vertical resilient strand and the mass being connected with spring through spring.
4. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 3, is characterized in that: described inSpring adopt martensite marmem High Damping Spring.
5. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 3, is characterized in that: described inResilient strand adopt austenite shape memory alloy super-elasticity twisted wire.
6. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 3, is characterized in that: described inMass is the fence type combination block that is wrapped with the austenitic stainless steel of aluminium sheet..
7. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 3, is characterized in that: described inThe length of spring determines that mode is as follows:
lori＝l0-mpg/ks
Wherein: ksFor spring rate, loriFor the former length of spring, l0For the length of spring under Action of Gravity Field,Mass weight is mp。
8. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 7, is characterized in that: described inl0Definite mode as follows:
In formula, f is the fundamental frequency of main structure.
9. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 1, is characterized in that: described inThe hunting frequency of Spring Pendulum be consistent by the master oscillator frequenc of control structure.
10. non-linear dynamic absorbing electromagnetic energy-consumption device as claimed in claim 1, is characterized in that: described inNon-linear dynamic absorbing electromagnetic energy-consumption device use time be arranged on by the top of control structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520917424.4U CN205259388U (en) | 2015-11-17 | 2015-11-17 | Nonlinearity dynamic vibration absorber electromagnetism power consumption device |
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| CN201520917424.4U CN205259388U (en) | 2015-11-17 | 2015-11-17 | Nonlinearity dynamic vibration absorber electromagnetism power consumption device |
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| CN205259388U true CN205259388U (en) | 2016-05-25 |
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| CN201520917424.4U Withdrawn - After Issue CN205259388U (en) | 2015-11-17 | 2015-11-17 | Nonlinearity dynamic vibration absorber electromagnetism power consumption device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297939A (en) * | 2015-11-17 | 2016-02-03 | 山东大学 | Nonlinear dynamic vibration absorption and electromagnetic energy dissipation device |
| CN106639470A (en) * | 2016-12-06 | 2017-05-10 | 山东大学 | Vibration-attenuation control device for eddy current damper |
-
2015
- 2015-11-17 CN CN201520917424.4U patent/CN205259388U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297939A (en) * | 2015-11-17 | 2016-02-03 | 山东大学 | Nonlinear dynamic vibration absorption and electromagnetic energy dissipation device |
| CN106639470A (en) * | 2016-12-06 | 2017-05-10 | 山东大学 | Vibration-attenuation control device for eddy current damper |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160525 Effective date of abandoning: 20170531 |
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| AV01 | Patent right actively abandoned |