CN102927182A - Moebius vibration isolator based on wave mode conversion mechanism and energy local effect - Google Patents
Moebius vibration isolator based on wave mode conversion mechanism and energy local effect Download PDFInfo
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- CN102927182A CN102927182A CN2012102145542A CN201210214554A CN102927182A CN 102927182 A CN102927182 A CN 102927182A CN 2012102145542 A CN2012102145542 A CN 2012102145542A CN 201210214554 A CN201210214554 A CN 201210214554A CN 102927182 A CN102927182 A CN 102927182A
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Abstract
The invention relates to a Moebius vibration isolator based on a wave mode conversion mechanism and an energy local effect. The Moebius vibration isolator is formed by combining multiple Moebius banded structures, and the multiple Moebius banded structures are connected into an integral structure through an upper part bearing force platform and a lower part bearing force platform; and the upper part bearing force platform and the lower part bearing force platform are respectively connected with upper part inclined plane regions and lower part circular arc regions of the Moebius banded structures. The Moebius vibration isolator provided by the invention couples the bending rigidity and torsional rigidity of the Moebius banded structures, the energy local region property is taken as an vibration isolation structure of a vibration isolation mechanism, and the Moebius vibration isolator has the advantages of large load-carrying ability, small static transformation, low inherent frequency, higher damping, and is capable of realizing low-frequency broad band transfer admittance and can not generate creepage, aging and temperature sensibility and the like.
Description
Technical field
The present invention relates to a kind of vibration isolator, in particular, relate to wave mode switching mechanism that a kind of Moebius of utilization banded structure has and energy localization effect as the vibration isolator of vibration isolation mechanism.
Background technique
Vibration isolator is widely used in the vibration isolation of machinery.Adopting the design object of vibration isolator is to make the natural frequency of vibrating isolation system low as far as possible, and vibration isolation efficiency is high as far as possible.But determine the quiet rigidity of its bearing capacity, stability and determine that the dynamic stiffness of its anti-vibration performance is conflict.From the angle of design of vibration isolator, be to make vibration isolator have larger bearing capacity and the less distortion of all directions to the requirement of quiet rigidity, to satisfy stability requirement; Be to make the former point impedance of vibration isolator as far as possible and be connected structure generation impedance mismatching to the requirement of dynamic stiffness, and transfer impedance is greatly to produce larger vibration attenuation.
The vibration isolator of commonly using at present is rubber vibration isolator, air cushion shock absorber, steel-wire isolator, metallic rubber vibration isolator and metal curved beam vibration isolator etc. again.Because all being the linear deformations by rubber, wire and air, quiet rigidity, the dynamic stiffness of rubber vibration isolator, metallic rubber vibration isolator and pneumatic spring provide, therefore can't satisfy simultaneously less quiet distortion and lower isolation frequency, and the compressional wave of inside configuration can unhinderedly be propagated, and causes transfer impedance less; Steel-wire isolator mainly bears static load and dynamic load by bending deflection; Metal curved beam vibration isolator provides quiet rigidity and dynamic stiffness by linear deformation and bending deflection, can bear larger load and satisfy simultaneously low natural frequency.And because the flexural wave of curved beam and compressional wave coupling have the wave mode transition effects, the mutual conversion of compressional wave and flexural wave can realize the decay of energy, and its transfer impedance is larger.But because the conversion of compressional wave and flexural wave occurs in higher frequency band, therefore this decay usually occurs in higher frequency band.
The Moebius banded structure is a kind of have initial distortion and crooked chirality structure.It not only has coupling and the mutually conversion of flexural wave and the compressional wave of curved beam, also there are coupling and mutually conversion between these two kinds of ripples and the torsional shear ripple, and the conversion meeting between the torsional shear ripple further reduces the frequency that the wave mode conversion occurs, so that transfer admittance can realize the decay of energy at lower frequency, improve the efficient of transformation of energy.In recent research, Starostin and Heijden find that the Moebius banded structure is when it is stable shaped, its distortion and the crooked elastic energy that contains are by the maximum curvature place of local in structure, curvature is than the less [Starostin of energy of zonule, E., Van Der Heijden, G.The shape of a
Strip.Nature Materials, 2007,6 (8): 563-567, Starostin, E., Van Der Heijden, G.:
The shape of banded structure, nature-materials science].This energy localization character can be used to construct New Type Vibration Isolator Using.
Because the energy localization effect, on the one hand, form the less zone of energy of deformation in the curvature of Moebius banded structure than the zonule, can be used for Vibration Absorbing System Design; On the other hand, owing to there is the local phenomenon of energy and mode in the larger zone of curvature, form local mode, cause the internal resonance phenomenon that is similar to the rubber vibration isolator standing wave effect, therefore, need to be suppressed these local modes.For overcoming the less characteristics of metal isolator damping, can adopt the way of free damping layer and master, passive bound damping layer to improve.The free damping layer directly sticks on body structure surface with viscoelastic materials such as rubber, and by the tension and compression deformation consumed energy, so damping effect is lower, and is convenient but it is processed.If adopt the free damping layer, because there is initial torsional shear distortion in the Moebius banded structure, and the wave mode conversion can occur between flexural wave, compressional wave and the torsional wave, and its shear deformation may be strengthened the energy dissipation of damping layer, strengthens damping layer at the damping of medium, high frequency.
At present, there is no the report that this technical research is applied to make New Type Vibration Isolator Using both at home and abroad.
Summary of the invention
The present invention is directed to the technical problem that exists in the above-mentioned prior art, a kind of Moebius vibration isolator based on waveform transformation mechanism and energy area effect is provided.This Moebius vibration insulation structure has that large, the quiet distortion of bearing capacity is little, natural frequency is low, can realize the wide band transfer admittance of low frequency, has than high damping, and the advantages such as creep, aging and temperature sensitivity do not occur.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of Moebius vibration isolator based on waveform transformation mechanism and energy area effect, it is the flexural wave that utilizes the Moebius banded structure to have, compressional wave and torsional wave coupling and mutually conversion, energy localization character is as the vibration insulation structure of vibration isolation mechanism, described Moebius vibration isolator is that a plurality of Moebius banded structures are combined formation, be connected to an overall structure by top load platform and bottom load platform between described a plurality of Moebius banded structure, described top load platform links to each other with bottom circular arc zone with the upper inclined surface zone of Moebius banded structure respectively with bottom load platform.
Upper and lower surface at described Moebius banded structure is pasted the free damping layer, strengthens the damping of structure.
Described top load platform structure is the mass block that two wedge shape curved surfaces are arranged at a bottom.
Described top load platform or bottom load platform can be designed to an integrated type, link to each other with a plurality of Moebius banded structures.
Described top load platform or bottom load platform can be designed to link to each other in twos, and then by integral body of the continuous formation of a transition structure.
Moebius banded structure between described top load platform and the bottom load platform can be 3 or 4.
Described Moebius banded structure seals.
Described Moebius banded structure does not seal.
Described Moebius banded structure has removed the short flexion torsion part between top load platform and the bottom load platform.
Described Moebius banded structure can formal dress, also can instead fill.
Among the present invention, because the Moebius banded structure that adopts is the initial bending that has and the structure of distortion, it bears static load and dynamic load together by bending deflection, linear deformation and torsional deflection when stand under load.The present invention has utilized the mechanism that flexural wave, compressional wave and torsional wave intercouple and change in the Moebius banded structure, and the distribution of energy in the Moebius banded structure has the characteristic of locality, the upper and lower not tie point of appropriate design in the Moebius banded structure, the wave mode conversion when utilizing vibration to transmit in the Moebius banded structure realizes vibration attenuation.Paste the free damping layer to strengthen the shear deformation of free damping layer on the surface of Moebius banded structure, realize energy dissipation, and eliminate the fatigue stress of curvature major part.
Designed Moebius vibration insulation structure has that large, the quiet distortion of bearing capacity is little, natural frequency is low, can realize the wide band transfer admittance of low frequency, has than high damping, and the advantages such as creep, aging and temperature sensitivity do not occur.
Description of drawings
Fig. 1 is a kind of common Moebius banded structure schematic representation;
Fig. 2 is the parallel-connection structure schematic representation that is made of Moebius banded structure shown in Figure 1;
Fig. 3 (a) is the plan view of Fig. 2;
Fig. 3 (b) is the plan view of Fig. 2;
Fig. 3 (c) is the side view of Fig. 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is done a detailed explanation:
Common Moebius banded structure shown in Figure 1 is a kind of Moebius banded structure with unilateral surface of initial bending and distortion.
Fig. 2 is the parallel-connection structure schematic representation that is made of above-mentioned Moebius banded structure, and this structure is made of top load platform 1, two Moebius banded structures 2 and bottom load platform 3.Top load platform 1 is the mass block that two wedge shape curved surfaces are arranged at a bottom.Top load platform 1 links to each other with bottom circular arc zone with the upper inclined surface zone of Moebius banded structure 2 respectively by bolt with bottom load platform 3, and two Moebius banded structures 2 are linked together.Can by paste the free damping layer of the about 2～3mm of thickness in the upper and lower surface of Moebius banded structure 2, strengthen the damping of structure.
Fig. 3 (a)～Fig. 3 (c) is the view on three directions of the parallel-connection structure that consists of of above-mentioned Moebius banded structure.
Among the present invention, a plurality of Moebius banded structure 2(are pasted the free damping layer and are not pasted the free damping layer) combine, just consist of the Moebius vibration isolator.Top load platform 1 and the bottom load platform 3 of Moebius vibration isolator can be designed to integrated type, link to each other with a plurality of Moebius banded structures 2 by a load platform.Also can be designed to link to each other in twos, linking to each other by a transition structure more at last forms an integral body.
The mode that said structure bears static load is: when the Moebius vibration insulation structure is subject to static load, top load platform is subjected to compression and is subjected to displacement to the bottom, these off-positions move provides a part with the lateral deformation by the bracketed part of Moebius banded structure, and therefore the displacement that occurs downwards when being subject to heavy duty of whole Moebius vibration insulation structure is little.And because the Moebius vibration insulation structure is a spatial structure, the load of other directions also can pass to by top load platform the bracketed part of Moebius banded structure, and therefore, the Moebius vibration insulation structure is a vibration insulation structure with multidirectional bearing capacity.
When vibration is delivered to designed vibration insulation structure through top load platform, a vibration part can partly be transmitted by the short flexion torsion between the upper and lower load platform of Moebius banded structure, another part can partly transmit by the long flexion torsion between the upper and lower load platform of Moebius banded structure, both in the process of transmitting, all can bend wave mode conversions of ripple, compressional wave and torsional wave, realize the decay of energy, and latter's meeting local in transmittance process is realized the local effect of energy in larger curvature.Energy can obtain by the shearing effect of damping layer dissipating after pasting the free damping layer, realizes the isolation of vibration.
Above-described embodiment is interpreted as only being used for explanation the present invention and is not used in restriction protection scope of the present invention.After the content of having read the present invention's record, those skilled in the art can make various changes or modifications the present invention, and these equivalences change and modification falls into claim limited range of the present invention equally.
Claims (10)
1. Moebius vibration isolator based on waveform transformation mechanism and energy area effect, it is the flexural wave that utilizes the Moebius banded structure to have, compressional wave and torsional wave coupling and mutually conversion, energy localization character is as the vibration insulation structure of vibration isolation mechanism, it is characterized in that, described Moebius vibration isolator is that a plurality of Moebius banded structures are combined formation, be connected to an overall structure by top load platform and bottom load platform between described a plurality of Moebius banded structure, described top load platform links to each other with bottom circular arc zone with the upper inclined surface zone of Moebius banded structure respectively with bottom load platform.
2. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 is characterized in that, pastes the free damping layer in the upper and lower surface of described Moebius banded structure, strengthens the damping of structure.
3. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, described top load platform is the mass block that two wedge shape curved surfaces are arranged at a bottom.
4. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, described top load platform or bottom load platform can be designed to an integrated type, links to each other with a plurality of Moebius banded structures.
5. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2, it is characterized in that, described top load platform or bottom load platform can be designed to link to each other in twos, and then by integral body of the continuous formation of a transition structure.
6. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, the Moebius banded structure between described top load platform and the bottom load platform can be 3 or 4.
7. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, described Moebius banded structure seals.
8. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, described Moebius banded structure does not seal.
9. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 7 is characterized in that, described Moebius banded structure has removed the short flexion torsion part between top load platform and the bottom load platform.
10. the Moebius vibration isolator based on waveform transformation mechanism and energy area effect according to claim 1 and 2 is characterized in that, described Moebius banded structure can formal dress, also can instead fill.
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| CN201210214554.2A CN102927182B (en) | 2012-06-26 | 2012-06-26 | Moebius vibration isolator based on wave mode conversion mechanism and energy local effect |
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| CN102927182B CN102927182B (en) | 2015-01-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020331A (en) * | 2014-04-30 | 2015-11-04 | 费斯托股份有限两合公司 | Lightweight structure |
| CN110848305A (en) * | 2019-11-07 | 2020-02-28 | 松冷（武汉）科技有限公司 | Shock absorber and elastic shock absorption device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2373777A (en) * | 2001-03-28 | 2002-10-02 | Ace Conveyor Equip | Mobius conveyor belt |
| DE202004005763U1 (en) * | 2004-04-13 | 2004-07-15 | Haitovs, Leopolds | Drive belt for machinery drives has entire surface produced as Mobius band, i.e. as single surface; surface is twisted relative to axis with cross-sections coinciding again at ends joined to form ring |
| RU2378543C1 (en) * | 2008-09-25 | 2010-01-10 | Закрытое акционерное общество "Управляющая компания "Брянский машиностроительный завод" (ЗАО "УК "БМЗ") | All-metal silentblock |
-
2012
- 2012-06-26 CN CN201210214554.2A patent/CN102927182B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2373777A (en) * | 2001-03-28 | 2002-10-02 | Ace Conveyor Equip | Mobius conveyor belt |
| DE202004005763U1 (en) * | 2004-04-13 | 2004-07-15 | Haitovs, Leopolds | Drive belt for machinery drives has entire surface produced as Mobius band, i.e. as single surface; surface is twisted relative to axis with cross-sections coinciding again at ends joined to form ring |
| RU2378543C1 (en) * | 2008-09-25 | 2010-01-10 | Закрытое акционерное общество "Управляющая компания "Брянский машиностроительный завод" (ЗАО "УК "БМЗ") | All-metal silentblock |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020331A (en) * | 2014-04-30 | 2015-11-04 | 费斯托股份有限两合公司 | Lightweight structure |
| CN110848305A (en) * | 2019-11-07 | 2020-02-28 | 松冷（武汉）科技有限公司 | Shock absorber and elastic shock absorption device |
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| Publication number | Publication date |
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| CN102927182B (en) | 2015-01-21 |
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