CN102927182B - 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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- CN102927182B CN102927182B CN201210214554.2A CN201210214554A CN102927182B CN 102927182 B CN102927182 B CN 102927182B CN 201210214554 A CN201210214554 A CN 201210214554A CN 102927182 B CN102927182 B CN 102927182B
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Abstract
一种基于波型转换机理和能量局域效应的Moebius隔振器，所述Moebius隔振器是将多个Moebius带状结构组合在一起构成，所述多个Moebius带状结构之间通过上部承力平台和下部承力平台相连为一整体结构，所述上部承力平台和下部承力平台分别与Moebius带状结构的上部斜面区域和下部圆弧区域相连。本发明所提供的Moebius隔振器，利用Moebius带状结构所具有的弯曲刚度和扭转刚度耦合，能量局域性质作为隔振机理的隔振结构，具有承载能力大、静变形小、固有频率低，能够实现低频的宽频带传递导纳，具有较高阻尼，不发生蠕变、老化和温度敏感性等优点。
A Moebius vibration isolator based on the wave mode conversion mechanism and energy localization effect, the Moebius vibration isolator is formed by combining a plurality of Moebius strip structures, and the upper bearing The load-bearing platform and the lower load-bearing platform are connected to form an integral structure, and the upper load-bearing platform and the lower load-bearing platform are respectively connected with the upper slope area and the lower arc area of the Moebius strip structure. The Moebius vibration isolator provided by the present invention utilizes the coupling of the bending stiffness and torsional stiffness of the Moebius strip structure, and the energy localization property is used as the vibration isolation structure of the vibration isolation mechanism, which has large bearing capacity, small static deformation, and low natural frequency , can achieve low-frequency broadband transfer admittance, with high damping, no creep, aging and temperature sensitivity and other advantages.
Description
Technical field
The present invention relates to a kind of vibration isolator, in particular, relate to shape transformation mechanism that a kind of Moebius of utilization banded structure has and the energy localization effect vibration isolator as vibration isolation mechanism.
Background technique
Vibration isolator is widely used in the vibration isolation of machinery.The design object adopting vibration isolator makes the natural frequency of vibrating isolation system low as far as possible, and vibration isolation efficiency is high as far as possible.But the Static stiffness determining its bearing capacity, stability and the dynamic stiffness determining its anti-vibration performance are conflicts.From the angle of design of vibration isolator, be make vibration isolator have larger bearing capacity and the less distortion of all directions, to meet stability requirement to the requirement of Static stiffness; Be make the initial 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 larger to produce larger vibration attenuation.
Vibration isolator rubber vibration isolator, air cushion shock absorber, steel-wire isolator, metallic rubber vibration isolator and metal curved beam vibration isolator etc. again conventional at present.Because the Static stiffness of rubber vibration isolator, metallic rubber vibration isolator and pneumatic spring, dynamic stiffness are all provided by the linear deformation of rubber, wire and air, therefore cannot meet less quiet distortion and lower isolation frequency simultaneously, and the compressional wave of inside configuration can unhinderedly be propagated, cause transfer impedance less; Steel-wire isolator bears static load and dynamic load primarily of bending deflection; Metal curved beam vibration isolator provides Static stiffness and dynamic stiffness by linear deformation and bending deflection, can bear larger load and meet lower natural frequency simultaneously.And due to the flexural wave of curved beam and compressional wave coupling, have shape transformation effect, 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.
Moebius banded structure is a kind of chirality structure having initial distortion and bend.It not only has the flexural wave of curved beam and the coupling of compressional wave and mutually changes, also there is these two kinds of ripples and being coupled and mutually changing between torsional shear ripple, and the conversion between torsional shear ripple can reduce the frequency that shape transformation occurs further, make transfer admittance can realize the decay of energy at lower frequency, improve the efficiency of transformation of energy.In recent research, Starostin and Heijden finds that Moebius banded structure is when it is stable shaped, its distortion and the bending elasticity contained can by the maximum curvature place of local in structure, curvature is compared with the less [Starostin of the 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.
Due to energy localization effect, on the one hand, form the less region of energy of deformation in the curvature of Moebius banded structure compared with zonule, may be used for Vibration Absorbing System Design; On the other hand, because the region larger in curvature exists the local phenomenon of energy and mode, form local mode, cause the internal resonance phenomenon being similar to rubber vibration isolator standing wave effect, therefore, need to be suppressed these local modes.For overcoming the less feature of metal isolator damping, the way of vector free axis method and active and passive restriction damping layer can be adopted to improve.The viscoelastic materials such as rubber are directly pasted onto body structure surface by vector free axis method, and by tension and compression deformation consumed energy, therefore damping effect is lower, but its process is convenient.If employing vector free axis method, because Moebius banded structure exists initial torsional shear distortion, and flexural wave, between compressional wave and torsional wave, can shape transformation be there is, its shear deformation may strengthen the energy dissipation of damping layer, strengthens the damping of damping layer at medium, high frequency.
At present, there is no this technical research both at home and abroad and be applied to the report manufacturing New Type Vibration Isolator Using.
Summary of the invention
The present invention is directed to the technical problem existed in 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, have comparatively 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 utilizing Moebius banded structure to have, compressional wave and torsional wave coupling are changed with mutual, energy localization character is as the vibration insulation structure of vibration isolation mechanism, described Moebius vibration isolator is that multiple Moebius banded structure is combined formation, an overall structure is connected to by top load platform and bottom load platform between described multiple Moebius banded structure, described top load platform is connected with circular arc sector, bottom with the upper inclined surface region of Moebius banded structure respectively with bottom load platform.
Paste vector free axis method in the upper and lower surface of described Moebius banded structure, strengthen 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, are connected with multiple Moebius banded structure.
Described top load platform or bottom load platform can be designed to be connected between two, and then are connected to form an entirety by a transition structure.
Moebius banded structure between described top load platform and bottom load platform can be 3 or 4.
Described Moebius banded structure is closed.
Described Moebius banded structure is not closed.
Described Moebius banded structure eliminates the shorter flexion torsion part between top load platform and bottom load platform.
Described Moebius banded structure can formal dress, also can instead fill.
In the present invention, because the Moebius banded structure adopted is the structure of initial bending and the distortion had, it bears static load and dynamic load when stand under load by bending deflection, linear deformation together with torsional deflection.Present invention utilizes the mechanism that in Moebius banded structure, flexural wave, compressional wave and torsional wave intercouple and change, and the distribution of energy in Moebius banded structure has the characteristic of locality, the upper and lower not tie point of appropriate design in Moebius banded structure, shape transformation when utilizing vibration to transmit in Moebius banded structure realizes vibration attenuation.At the surface mount vector free axis method of Moebius banded structure to strengthen the shear deformation of vector free axis method, 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, have comparatively high damping, and the advantages such as creep, aging and temperature sensitivity do not occur.
Accompanying drawing explanation
Fig. 1 is a kind of common Moebius banded structure schematic diagram;
Fig. 2 is the parallel-connection structure schematic diagram that Moebius banded structure is as shown in Figure 1 formed;
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 described in further detail:
Common Moebius banded structure shown in Fig. 1 is a kind of Moebius banded structure with the unilateral surface of initial bending and distortion.
Fig. 2 is the parallel-connection structure schematic diagram be made up of above-mentioned Moebius banded structure, and this structure is made up 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 is connected with circular arc sector, bottom with the upper inclined surface region of Moebius banded structure 2 by bolt respectively with bottom load platform 3, is linked together by two Moebius banded structures 2.By pasting the vector free axis method of thickness about 2 ~ 3mm 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 above-mentioned Moebius banded structure is formed.
In the present invention, multiple Moebius banded structure 2(is pasted vector free axis method and does not paste vector free axis method) combine, just form Moebius vibration isolator.Top load platform 1 and the bottom load platform 3 of Moebius vibration isolator can be designed to integrated type, are connected with multiple Moebius banded structure 2 by a load platform.Also can be designed to be connected between two, finally be connected to form an entirety by a transition structure again.
The mode that said structure bears static load is: when Moebius vibration insulation structure is subject to static load, top load platform is subjected to compression lower portion and is subjected to displacement, the lateral deformation of the bracketed part by Moebius banded structure is provided a part by these Static Correction, and therefore the displacement that occurs downwards when being subject to heavy duty of whole Moebius vibration insulation structure is little.And because Moebius vibration insulation structure is a spatial structure, the load in other directions also can pass to the bracketed part of Moebius banded structure by top load platform, therefore, 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 be transmitted by the shorter flexion torsion part between Moebius banded structure upper and lower load platform, another part can be transmitted by the longer flexion torsion part between Moebius banded structure upper and lower load platform, both all can bend the shape transformation of ripple, compressional wave and torsional wave in the process transmitted, realize the decay of energy, and the latter's meeting local in transmittance process, in larger curvature, realizes the local effect of energy.After pasting vector free axis method, energy can be dissipated by the shearing effect of damping layer, realizes the isolation of vibration.
Above-described embodiment is interpreted as only being not used in for illustration of the present invention limiting the scope of the 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 equivalence changes and modification fall into the scope of the claims in the present invention equally.
Claims (9)
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| EP2940341B1 (en) * | 2014-04-30 | 2018-06-20 | FESTO AG & Co. KG | Lightweight construction 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 | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2373777A (en) * | 2001-03-28 | 2002-10-02 | Ace Conveyor Equip | Mobius conveyor belt |
| RU2378543C1 (en) * | 2008-09-25 | 2010-01-10 | Закрытое акционерное общество "Управляющая компания "Брянский машиностроительный завод" (ЗАО "УК "БМЗ") | All-metal silentblock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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