CN209585421U - A kind of controllable Meta Materials beam of band gap based on marmem - Google Patents
A kind of controllable Meta Materials beam of band gap based on marmem Download PDFInfo
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- CN209585421U CN209585421U CN201821999088.2U CN201821999088U CN209585421U CN 209585421 U CN209585421 U CN 209585421U CN 201821999088 U CN201821999088 U CN 201821999088U CN 209585421 U CN209585421 U CN 209585421U
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- marmem
- band gap
- liang
- meta materials
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Abstract
The utility model discloses a kind of controllable Meta Materials beams of band gap based on marmem, including Ji Liang, marmem and heating sheet；Marmem is in bending under the situation of heating, horizontal in cooling situation；The marmem is arranged on Ji Liang with setting interval along base beam length direction, and heating sheet is attached on marmem.The movement of locally resonant band gap may be implemented by the variation of shape memory metal shape for the utility model, realize the adjusting of band gap.It sets up simply, and does not force that the period is needed to set up realization.The switching that Prague band gap Yu locally resonant band gap may be implemented by the variation of marmem, has widened the range of adjustable band-gap significantly.
Description
Technical field
The utility model belongs to Meta Materials field more particularly to a kind of controllable Meta Materials of band gap based on marmem
Beam.
Background technique
There are band gap properties, the elastic wave propagation within the scope of bandgap frequency can be effectively suppressed Meta Materials beam, thus will
Meta Materials beam is applied in engineering structure, can realize effectiveness in vibration suppression by the band gap properties and pass-band performance of Meta Materials beam, this
It is of great significance for mechanical structure Vibration Absorption Designing.
So far, there are two ways for Meta Materials band gap mechanism.
The band gap research of early stage is mainly based upon Bragg diffraction mechanism, and the bandgap frequency position occurred is mainly by Bradley
The control of glazing bar part, i.e.,
A: lattice dimensions；λ: elastic wave wavelength.Bibliography: Sigalas M M, Economou E N.Elastic and
acoustic wave band structure[J].Journal of Sound and Vibration,1992,158(2):
377-382。
Another kind is long in the resonance characteristic and matrix for depend on locally resonant unit itself based on locally resonant mechanism
The interaction of wave traveling wave.Bibliography: Liu Z, Zhang X, Mao Y, et al.Locally resonant sonic
materials[J].Science,200,289(5485):1734-1736。
However realize that band gap depends on lattice dimensions by Prague mechanism, and common Meta Materials beam lattice dimensions are once
Determining cannot change, and limit the regulation to band gap locations；Realize Prague band gap of low frequency, it is necessary to use biggish crystalline substance
Lattice size, this limits application of the Bragg type Meta Materials in terms of low frequency vibration damping to a certain degree；
And although low frequency may be implemented in locally resonant profile material, but band gap width is smaller；And use " spring-oscillator " shape
The local band gap quantity of the common locally resonant profile material of formula only one, which has limited its multiple frequency ranges application.
Summary of the invention
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of band gap based on marmem
Controllable Meta Materials beam.
The controllable Meta Materials beam of the band gap based on marmem of the utility model, including Ji Liang, marmem
And heating sheet；The marmem is in bending under the situation of heating, horizontal in cooling situation；Described
Marmem with one or more pieces be a marmem unit, between the marmem unit is to set
It is arranged on Ji Liang every along base beam length direction, the heating sheet is attached on marmem.
Preferably, the marmem is two-way memory alloy, and the marmem only has one end to set
It sets on Ji Liang.
Preferably, the marmem unit includes two panels marmem, two panels marmem
One end is arranged on Ji Liang, and the other end is hanging, and the two panels marmem is arranged symmetrically relative to Ji Liang.
Preferably, the heating sheet is to have PI heating film, by the bending of control system of switching on or off electricity marmem piece with
It lies low.Preferably, the heating sheet on the marmem is identical, and heating sheet can be made by same switch control
Marmem is heated identical；It can also be controlled by multiple switch, keep partial shape memory alloy heated, part is not heated,
To realize the variation of lattice constant.
Preferably, the marmem unit along base beam length direction to be arranged on Ji Liang at equal intervals.
Preferably, described marmem one end is arranged on Ji Liang, and the other end is provided with mass block.The matter
Gauge block can be steel ball, and the mass block can be set on plastics heelpiece, and the plastics heelpiece is connected to shape memory
On alloy, connection type, which can be, carries out face bonding by glue, can be eliminated by the transition of plastics heelpiece and directly use glue
It is bonded unstability existing for steel ball.3D printing method production can be used in plastics heelpiece.
Compared with prior art, beneficial effect possessed by the utility model is:
The utility model has no particular/special requirement to the shape and structure of Ji Liang, also wants without special to shape memory metal shape
It asks.
The movement that locally resonant band gap may be implemented by the variation of shape memory metal shape, realizes the tune of band gap
Section.It sets up simply, and does not force that the period is needed to set up realization.
In the scheme of mass block, steel ball can control by marmem whether it is attached on Ji Liang and adjust phase
The distance of adjacent steel ball increases lattice dimensions in such a way that steel ball is detached from Ji Liang to have the function that regulate and control lattice dimensions.
The switching that Prague band gap Yu locally resonant band gap may be implemented by the variation of marmem, is widened significantly
The range of adjustable band-gap.
Detailed description of the invention
Fig. 1 is the structural representation and test device figure of the utility model embodiment 1；
Fig. 2 is the band gap regulating effect figure of the utility model embodiment 1.
Fig. 3 is the structural representation and test device figure of the utility model embodiment 2；
Fig. 4 is the band gap regulating effect figure of the utility model embodiment 2.
Specific embodiment
The utility model is described further with reference to the accompanying drawings of the specification.
Embodiment 1
As shown in Figure 1, the controllable Meta Materials beam of the band gap based on marmem of the utility model, including Ji Liang, shape
Shape memory alloys and mass block；The marmem is two-way memory alloy, is in bending, In under the situation of heating
Horizontal in cooling situation, described marmem one end is arranged on Ji Liang, and the other end is provided with mass block, and institute
The marmem stated is evenly arranged on Ji Liang.
In specific embodiment of the utility model, the mass block is steel ball, the marmem on piece
Post PI heating film, the bending by control system of switching on or off electricity marmem piece with lie low.The mass block is arranged in plastics
On heelpiece, the plastics heelpiece is bonded on marmem by glue.
The controllable Meta Materials beam of the band gap based on marmem of the utility model can generally be made as follows
Make:
Step 1, design process suitable marmem curved beam and its control the mode of phase transformation；
Step 2, the connection type of design shape memorial alloy and mass block；
Suitable Ji Liang is processed in step 3, design；
Step 4 selects suitable mode to be attached marmem and Ji Liang.
In a specific embodiment of the utility model, radius of curvature R=35mm of the marmem piece,
Overall length 140mm, wide 10mm, thick 0.4mm；The steel ball radius R=8mm；The Ji Liang selects 6061 aluminium beams, long
1152mm, wide 15mm, thick 3mm, band gap effect is more obvious under the size.Arrange the shape memory in 8 periods altogether on Ji Liang
The two is attached by alloy unit by way of 502 gluings.
Test device includes piezo electric stack vibration excitor, fiber grating sensing system.Not by the output of piezo electric stack vibration excitor
The accumulation signal of same frequency, and in two side bonds fiber grating of Meta Materials beam with the vertical displacement signal of real-time detection two sides, it is defeated
The ratio of side displacement signal and input side displacement signal is vibration transmissibility out.
Fig. 2 shows the band gap of the controllable Meta Materials beam of the band gap of the present embodiment to test regulation figure, passes through marmem
Three kinds of different phonon crystal lattice constants are realized whether control steel ball adherency aluminium beam, have chosen the progress of 6000Hz following frequencies
Observation, as can be seen from the figure under the combination of four kinds of different conditions, most of frequency range may be implemented to vibrate Meta Materials beam
Forbidden band is transmitted, vibration transmitting passband may be implemented in most of frequency range, and the two intersection is then that can carry out forbidden band and lead to
The frequency range of belt switch regulation, which covers most of frequency range in 6000Hz.That is exist
" Push And Release " of the transmitting of Meta Materials beam vibration may be implemented in most of frequency range in 6000Hz.
Embodiment 2
As shown in figure 3, the controllable Meta Materials beam of the band gap based on marmem of the utility model, including Ji Liang, shape
Shape memory alloys；The marmem is two-way memory alloy, is in bending under the situation of heating, in cooling situation
Under it is horizontal, with two panels for a unit, one end of two panels marmem is arranged in base for the marmem
Liang Shang, the other end is hanging, and the two panels marmem is arranged symmetrically relative to Ji Liang.
In specific embodiment of the utility model, the marmem on piece posts PI heating film, by logical
Power-off control marmem piece bending with lie low.
The controllable Meta Materials beam of the band gap based on marmem of the utility model can generally be made as follows
Make:
Step 1, design process suitable marmem curved beam and its control the mode of phase transformation；
Suitable Ji Liang is processed in step 2, design；
Step 3 selects suitable mode to be attached marmem and Ji Liang.
In a specific embodiment of the utility model, radius of curvature R=35mm of the marmem piece,
Overall length 140mm, wide 10mm, thick 0.4mm；The Ji Liang selects 6061 aluminium beams, long 580mm, wide 10mm, thick 3mm, under the size
Band gap effect is more obvious.The marmem unit for arranging 6 periods altogether on Ji Liang, will by way of 502 gluings
The two is attached.
Test device includes piezo electric stack vibration excitor, fiber grating sensing system.Not by the output of piezo electric stack vibration excitor
The accumulation signal of same frequency, and in two side bonds fiber grating of Meta Materials beam with the vertical displacement signal of real-time detection two sides, it is defeated
The ratio of side displacement signal and input side displacement signal is vibration transmissibility out.
Fig. 4 shows the band gap experiment regulation figure of the controllable Meta Materials beam of band gap of the present embodiment, has chosen 2500Hz or less
Frequency is observed, and as can be seen from the figure the structure metamaterial beam is under the combination of two kinds of different conditions, more frequency model
It encloses and vibration transmitting forbidden band may be implemented, vibration transmitting passband may be implemented in most of frequency range, and the two intersection is then can
To carry out the frequency range of forbidden band and transmission band switch regulation, although the range is small compared with mass block structure, advantage is structure
It is simpler, and also it is able to achieve under many frequencies " Push And Release " of Meta Materials beam vibration transmitting.
Claims (8)
1. a kind of controllable Meta Materials beam of band gap based on marmem, it is characterised in that including Ji Liang, marmem
And heating sheet；The marmem is in bending under the situation of heating, horizontal in cooling situation；Described
Marmem with one or more pieces be a marmem unit, between the marmem unit is to set
It is arranged on Ji Liang every along base beam length direction, the heating sheet is attached on marmem.
2. the controllable Meta Materials beam of band gap as described in claim 1 based on marmem, it is characterised in that the shape
Shape memory alloys are two-way memory alloy, and one end of the marmem is arranged on Ji Liang.
3. the controllable Meta Materials beam of band gap as described in claim 1 based on marmem, it is characterised in that the shape
Shape memory alloys unit includes two panels marmem, and one end of two panels marmem is arranged on Ji Liang, the other end
Vacantly, and the two panels marmem is arranged symmetrically relative to Ji Liang.
4. the controllable Meta Materials beam of band gap as described in claim 1 based on marmem, it is characterised in that described adds
Backing is PI heating film, bending by control system of switching on or off electricity marmem piece with lie low.
5. the controllable Meta Materials beam of band gap as claimed in claim 4 based on marmem, it is characterised in that the shape
Heating sheet on shape memory alloys is identical.
6. the controllable Meta Materials beam of band gap as described in claim 1 based on marmem, which is characterized in that the shape
Shape memory alloys unit along base beam length direction to be arranged on Ji Liang at equal intervals.
7. the controllable Meta Materials beam of band gap as described in claim 1 based on marmem, which is characterized in that the shape
Shape memory alloys one end is arranged on Ji Liang, and the other end is provided with mass block.
8. the controllable Meta Materials beam of band gap as claimed in claim 7 based on marmem, which is characterized in that the matter
Gauge block is steel ball, and the mass block is arranged on plastics heelpiece, and the plastics heelpiece is connected on marmem.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441006A (en) * | 2018-11-30 | 2019-03-08 | 浙江大学 | The controllable Meta Materials beam of band gap based on marmem |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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