CN201794176U - Vibration absorber for variable-frequency shape memory alloy composite beam - Google Patents
Vibration absorber for variable-frequency shape memory alloy composite beam Download PDFInfo
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- CN201794176U CN201794176U CN2010201725528U CN201020172552U CN201794176U CN 201794176 U CN201794176 U CN 201794176U CN 2010201725528 U CN2010201725528 U CN 2010201725528U CN 201020172552 U CN201020172552 U CN 201020172552U CN 201794176 U CN201794176 U CN 201794176U
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- shape memory
- memory alloy
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- marmem
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Abstract
The utility model discloses a vibration absorber for a variable-frequency shape memory alloy composite beam. Traditional vibration absorbers are lower in absorption efficiency. The variable frequency shape memory alloy composite beam vibration absorber comprises a metal cantilever beam, a mass, a base and shape memory alloy pieces. One end of the linear platy metal cantilever beam is fixedly connected with the base, the other end is fixedly connected with the mass, three to five shape memory alloy pieces are uniformly distributed on the upper surface and the lower surface of the metal cantilever beam, the top and the bottom of each shape memory alloy piece are provided with outlet electrode wires, one electrode wire of each shape memory alloy piece is connected with one pole of a heating circuit, the other electrode wire is connected with the other pole of the heating circuit, and temperature of the shape memory alloy pieces is increased by the heating circuit. A temperature sensor is disposed on a face of each shape memory alloy piece far away from the metal cantilever beam and used for measuring the temperature of the corresponding shape memory alloy piece. The variable frequency shape memory alloy composite beam vibration absorber is wide in operation range, simple in structure and easy in miniaturization.
Description
Technical field
The utility model belongs to the structural vibration reduction technical field, is specifically related to a kind of marmem composite beam vibration absorber of frequency adjustable.
Background technology
For engineering structures, if through up to a million times even more than one hundred million inferior vibration, structure can be destroyed because of tired; In addition, the vibration of engineering structures causes injurious effects to precision equipment and instrument and accurate activities sometimes, and the quality of product can not get guaranteeing.Therefore more and more to the research of vibration absorber, requirement to absorption of vibrations efficient is also more and more higher, expectation is by the change of new material perception external environment condition and internal state, and information is discerned and inferred by self mechanism, thereby reasonably drives structure is made response, reaches half ACTIVE CONTROL of structural vibration.After general metal material is subjected to external force, elastic deformation takes place at first, reach yield point and just produce plastic strain, stay permanent deformation after stress is eliminated, dynamic control that can't implementation structure; Traditional in addition vibration absorber has only a certain specific frequency, and external structure is in vibration processes, the frequency of external structure is not often fixed, but there is certain frequency drift, after in case the frequency of external structure changes, the absorption efficiency of traditional vibration absorber will reduce greatly, thereby traditional metal material can't satisfy the research needs of vibration absorber.Therefore, how to make novel composite material in good time, perception environmental change and can make in real time and change the action response that adapts exactly, realizes dynamic, online detection certainly, control certainly; The frequency adjustable that how to realize vibration absorber has become urgent problem in the research of current vibration absorber.
Along with development of material technology, the application of intellectual material in the vibration isolation field is subjected to increasing attention.Particularly marmem is that minority has induction simultaneously and drives materials with function, and this class material can be made adaptive adjustment according to the variation of external environment condition and self-condition, makes structure or material be in optimum state.Because marmem has shape memory effect and thermoelasticity coupled characteristic, variation has taken place in the physical property of marmem material in the process of heating or cooling, changed the modulus of elasticity of marmem composite beam, thereby the frequency of composite beam is also changed, realize that the vibrational energy of external structure minimizes.In addition, shape memory alloy material also has the superiority that other materials does not possess, and is fine as the fatigue properties of marmem, will occur interior damage unlike common material after certain circulation; And but the recovery strain of marmem is bigger, is that other materials is unapproachable.Therefore, shape memory alloy material is applied to the concern that structural vibration reduction will be subjected to more and more scholars.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of marmem composite beam vibration absorber of frequency adjustable is provided.The vibration absorber that the present invention proposes is with the controller of marmem sheet as frequency adjustment, by regulating the temperature of shape memory alloy film, thereby the frequency of composite beam oscillator is changed, final realization vibration absorber reaches the purpose of vibration damping to the absorption of outside structural vibration energy.
The present invention includes metal semi girder, mass, pedestal and marmem sheet.Pedestal can up-down vibration, metal semi girder one end of bar shaped sheet is fixedlyed connected with pedestal, the other end is fixedlyed connected with mass, upper and lower surface along the metal semi girder evenly is furnished with 3～5 plate shape memorial alloy sheets respectively, every plate shape memorial alloy sheet top and bottom extraction electrode line, an electrode wires of every plate shape memorial alloy sheet extremely links to each other with one of heater circuit, another of another root electrode wires and heater circuit extremely links to each other, and improves the temperature of marmem sheet by heater circuit.In addition, every plate shape memorial alloy sheet is provided with temperature pick up away from the face of metal semi girder, is used for measuring the temperature of marmem sheet, and wherein heater circuit is ripe circuit product.Every plate shape memorial alloy sheet links to each other with heater circuit independently, can obtain the frequency of different composite beam oscillators by the different marmem sheet of independent heating, also can make up the frequency that obtains different composite beam oscillators, make that the frequency-tuning range of composite beam oscillator is wider by heating different marmem sheets.And when the marmem sheet lowered the temperature, also can enlarge the frequency-tuning range of composite beam oscillator by reducing the temperature of difformity memorial alloy sheet.
Beneficial effect of the present invention: traditional vibration absorber can only absorb the vibration of CF, and external structure tends to occur frequently floating in vibration processes, and vibration frequency can change constantly, and therefore traditional vibration absorber absorption efficiency is very low.The present invention is with temperature one frequency converter of marmem composite beam oscillator as the vibration absorber frequency adjustment, make vibration absorber possess the function of frequency adjustment, can regulate the frequency of composite beam oscillator according to the different frequency of external structure, when the frequency of the frequency of external structure and composite beam oscillator possesses certain matching relationship, vibration absorber absorbs most vibrational energies of external structure, realizes the optimum efficiency of vibration damping.The present invention have working range wide, simple in structure, be easy to advantages such as microminiaturization, frequency adjustable, can be widely used in civilian and structural vibration reduction aerospace field.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and example.
As shown in Figure 1, the absorption of vibrations apparatus comprises pedestal 1, temperature pick up 3, marmem sheet 2, metal semi girder 4 and mass 5.On the one end mounting base 1 of metal semi girder 4, pedestal 1 is connected with device to be absorbed, the other end is set with mass 5, evenly is furnished with five plate shape memorial alloy sheets 2 respectively along the upper and lower surface of metal semi girder 4, adds up to ten plate shape memorial alloy sheets 2.Every plate shape memorial alloy sheet 2 tops and bottom extraction electrode line, an electrode wires of every plate shape memorial alloy sheet 2 is connected with an end of heater circuit, another root electrode wires is connected with the other end of heater circuit, and each marmem sheet 2 all links to each other with heater circuit independently.When marmem sheet 2 needs cooling to handle, can directly use fan to blowing.Temperature pick up 3 is pasted on surface at every plate shape memorial alloy sheet 2, is used to detect the temperature of marmem sheet 2.Marmem sheet 2 adopts Ni-Ti memorial alloy sheet, and the length of marmem sheet 2 is 10mm, and wide is 10mm, thick 1mm.Two material bending beams that metal semi girder 4 adopts the Al/SiNx of high elastic modulus to constitute, long is 60mm, wide 15mm, thick 0.5mm.
When device to be absorbed vibrates, by improving or reduce the temperature of marmem sheet, the physical property of marmem sheet is changed, at this moment, change has also taken place in the modulus of elasticity of marmem composite beam, thereby changed the intrinsic frequency of composite beam oscillator, realized the frequency adjustable of composite beam oscillator.When the vibration frequency of the intrinsic frequency of composite beam oscillator and external environment condition possessed certain matching relationship, the composite beam oscillator can absorb the vibrational energy of the external environment condition overwhelming majority, has improved the efficient of absorption of vibrations greatly.
The composite beam that contains the marmem sheet is one of core parts of vibration absorber, with step mode heating marmem sheet, with fan the form of blowing is lowered the temperature to the marmem sheet.Because marmem has shape memory effect and thermoelasticity coupled characteristic, so the marmem sheet be heated or temperature-fall period in the physical property of material variation has taken place, change has taken place in the modulus of elasticity of composite beam, thereby the frequency of composite beam oscillator is changed.When the frequency of adjusting composite beam oscillator and external structure frequency possessed certain matching relationship, the composite beam oscillator just can absorb the vibrational energy of the external structure overwhelming majority, realizes the purpose of vibration damping.The vibration characteristics of temperature, material behavior and the semi girder of the frequency size and shape memorial alloy sheet of composite beam oscillator etc. all has confidential relation, and wherein the temperature of marmem sheet is the most obvious to the influence of composite beam oscillator frequency.
Claims (1)
1. the marmem composite beam vibration absorber of frequency adjustable comprises metal semi girder, mass, pedestal and marmem sheet, it is characterized in that:
Metal semi girder one end of bar shaped sheet is fixedlyed connected with pedestal, the other end is fixedlyed connected with mass, upper surface and soffit along the metal semi girder are evenly arranged 3～5 plate shape memorial alloy sheets respectively, every plate shape memorial alloy sheet top and bottom extraction electrode line, an electrode wires of every plate shape memorial alloy sheet extremely links to each other with one of heater circuit, another of another root electrode wires and heater circuit extremely links to each other, and improves the temperature of marmem sheet by heater circuit; Every plate shape memorial alloy sheet is provided with temperature pick up away from the face of metal semi girder, is used for measuring the temperature of marmem sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725528U CN201794176U (en) | 2010-04-27 | 2010-04-27 | Vibration absorber for variable-frequency shape memory alloy composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725528U CN201794176U (en) | 2010-04-27 | 2010-04-27 | Vibration absorber for variable-frequency shape memory alloy composite beam |
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| Publication Number | Publication Date |
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| CN201794176U true CN201794176U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201725528U Expired - Fee Related CN201794176U (en) | 2010-04-27 | 2010-04-27 | Vibration absorber for variable-frequency shape memory alloy composite beam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244599A (en) * | 2013-04-16 | 2013-08-14 | 北京航空航天大学 | Component-level MEMS (macro-electro-mechanical systems) device active vibration isolator utilizing SMA (shape memory alloy) |
| CN109441006A (en) * | 2018-11-30 | 2019-03-08 | 浙江大学 | The controllable Meta Materials beam of band gap based on marmem |
| CN109932804A (en) * | 2019-03-04 | 2019-06-25 | 杭州电子科技大学 | A kind of flexible memory alloy support device of small-bore lightweight mirror |
| CN110700076A (en) * | 2019-09-27 | 2020-01-17 | 河海大学 | Memory alloy damper |
| CN110725886A (en) * | 2019-10-23 | 2020-01-24 | 哈尔滨工业大学 | Active control SMA metal rubber shock absorber and vibration isolation performance adjusting method |
-
2010
- 2010-04-27 CN CN2010201725528U patent/CN201794176U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244599A (en) * | 2013-04-16 | 2013-08-14 | 北京航空航天大学 | Component-level MEMS (macro-electro-mechanical systems) device active vibration isolator utilizing SMA (shape memory alloy) |
| CN109441006A (en) * | 2018-11-30 | 2019-03-08 | 浙江大学 | The controllable Meta Materials beam of band gap based on marmem |
| CN109441006B (en) * | 2018-11-30 | 2023-09-01 | 浙江大学 | Band gap controllable metamaterial beam based on shape memory alloy |
| CN109932804A (en) * | 2019-03-04 | 2019-06-25 | 杭州电子科技大学 | A kind of flexible memory alloy support device of small-bore lightweight mirror |
| CN109932804B (en) * | 2019-03-04 | 2021-06-01 | 杭州电子科技大学 | Flexible memory alloy supporting device of small-caliber light reflector |
| CN110700076A (en) * | 2019-09-27 | 2020-01-17 | 河海大学 | Memory alloy damper |
| CN110700076B (en) * | 2019-09-27 | 2021-05-28 | 河海大学 | Memory alloy damper |
| CN110725886A (en) * | 2019-10-23 | 2020-01-24 | 哈尔滨工业大学 | Active control SMA metal rubber shock absorber and vibration isolation performance adjusting method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20140427 |