CN217301390U - One-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic material - Google Patents
One-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic material Download PDFInfo
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- CN217301390U CN217301390U CN202220660095.XU CN202220660095U CN217301390U CN 217301390 U CN217301390 U CN 217301390U CN 202220660095 U CN202220660095 U CN 202220660095U CN 217301390 U CN217301390 U CN 217301390U
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- straight cylinder
- thin shell
- vibration isolation
- isolation device
- lower straight
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- 239000013013 elastic material Substances 0.000 title claims abstract description 16
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- 235000017491 Bambusa tulda Nutrition 0.000 description 4
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
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Abstract
The utility model discloses a one-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic materials, which consists of a single cell array, wherein the single cell consists of two half cells, and the half cells consist of a support frame, a lower straight cylinder, a thin shell and an upper straight cylinder; the top of the upper straight cylinder is connected with the support frame; the bottom of the upper straight cylinder is connected with the top of the thin shell; the bottom of the thin shell is connected with the top of the lower straight cylinder; the bottom of the lower straight cylinder is connected with the sliding block and the supporting frame.
Description
Technical Field
The utility model relates to a vibration isolation device, concretely relates to one-dimensional accurate zero rigidity metamaterial nonlinear vibration isolation device based on elastic material constitutes.
Background
Metamaterials (Metamaterials) refer to artificial composite materials which are formed by artificial structural functional units according to specific spatial arrangement and have extraordinary macroscopic physical properties. The artificial composite material is constructed through the periodic, quasi-periodic or special lattice arrangement of the structural units, so that the special physical characteristics which cannot be realized or are difficult to realize by natural materials are realized. Due to supernormal functions of electromagnetism, sound, heat, force and the like, the metamaterial has huge application potential in the fields of stealth camouflage, electronic countermeasure, navigation communication, early warning guidance, imaging identification and the like, and at present, the research of the one-dimensional quasi-zero stiffness metamaterial is mainly applied to acoustics, such as low-frequency forbidden bands, fluctuation attenuation, sound absorption and the like. The application research of the one-dimensional quasi-zero stiffness metamaterial in the field of vibration isolation is less, and the linear vibration isolation theory shows that the vibration isolation effect is achieved only when the excitation frequency of a system is higher than the rejection inherent frequency. To achieve low frequency vibration isolation, mass may be added or stiffness may be reduced, but adding mass increases the manufacturing cost of the system, reducing stiffness causes large deformations, and the system tends to become unstable. The quasi-zero stiffness vibration isolator has the characteristics of high static and low dynamic, high static load supporting capacity and low dynamic stiffness, and the quasi-zero stiffness vibration isolation device reduces the dynamic stiffness of a system by utilizing the principle of parallel connection of positive stiffness and negative stiffness on the premise of not influencing the bearing capacity of the system, so that low-frequency vibration isolation is realized. However, most of quasi-zero stiffness vibration isolation systems are formed based on the principle that positive and negative stiffness elements are connected in parallel, the assembly error is large, the reliability is poor, the friction force is high, and the vibration isolation performance is not ideal enough. The utility model discloses a quasi-zero rigidity metamaterial non-linear vibration isolation device of one-dimensional based on elastic material constitutes utilizes the structure of self to realize the parallelly connected of positive negative rigidity, and two half cell longitudinal symmetry constitute the single cell, and the single cell has constituted the quasi-zero rigidity metamaterial vibration isolation device of one-dimensional through the array, and this kind of structural reliability is high, and low in manufacturing cost can realize the ultralow frequency vibration isolation.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The vibration isolation system aims at the problems that most of quasi-zero stiffness vibration isolation systems are formed on the basis of the principle that positive and negative stiffness elements are connected in parallel, the assembly error is large, the reliability is poor, the friction force is high, the vibration isolation performance is not ideal enough, and the like. The utility model discloses a quasi-zero rigidity metamaterial non-linear vibration isolation device of one-dimensional based on elastic material constitutes utilizes the structure of self to realize the parallelly connected of positive negative rigidity, and two half cell longitudinal symmetry constitute the single cell, and the single cell has constituted the quasi-zero rigidity metamaterial vibration isolation device of one-dimensional through the array, and this kind of structural reliability is high, and low in manufacturing cost can realize the ultralow frequency vibration isolation.
(II) technical scheme
In order to achieve the purpose, the utility model adopts the technical proposal that: the one-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on the elastic material comprises n same single cell units which are connected in sequence from left to right, wherein n is more than or equal to 1; each single-cell unit is composed of two semi-cells which are vertically symmetrical, and each semi-cell comprises a support platform, a lower straight cylinder, a thin shell and an upper straight cylinder; the top of the supporting platform is connected with a lower straight cylinder, the lower straight cylinder is connected with a thin shell, the thin shell is connected with an upper straight cylinder, and the upper straight cylinder is connected with the bottom of the supporting platform.
Furthermore, the supporting platform is of a rectangular structure, the upper part of the supporting platform is connected with the lower straight cylinder, and the lower part of the supporting platform is connected with the upper straight cylinder. The support table is provided for ease of alignment.
Furthermore, the lower straight cylinder is of a cylindrical structure, and the interior of the lower straight cylinder is hollow.
Furthermore, the thin shell is of a conical structure, and the interior of the thin shell is hollow.
Furthermore, the upper straight cylinder is of a cylindrical structure, and the interior of the upper straight cylinder is hollow.
Furthermore, the lower straight cylinder, the thin shell and the upper straight cylinder are the same in thickness and made of super-elastic materials such as rubber, and the supporting table is made of harder tpu materials and is convenient to arrange.
(III) advantageous effects
The utility model provides a super material nonlinear vibration isolation device of one-dimensional quasi-zero rigidity based on elastic material constitutes possesses following beneficial effect:
(1) the utility model discloses a bending and the compression of thin shell can make the structure produce great deformation under compression load, can get back to original position again voluntarily after the uninstallation.
(2) The utility model discloses a compression and the crooked outside extension of straight section of thick bamboo down of thin shell between straight section of thick bamboo and the last straight section of thick bamboo consume external mechanical energy, reach the effect of damping power consumption.
(3) The utility model discloses a design of structure can realize having great damped effect, realizes ultralow frequency vibration isolation. The material can be used for ultra-low frequency vibration isolation of high-precision instruments such as aerospace, ships, military, satellites and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
fig. 1 is a schematic diagram of a middle half-cell structure of the present invention, wherein a is a front view, b is a left view, c is a top view, d is an axonometric view, and the half-cell is composed of a supporting platform, a lower straight cylinder, a thin shell and an upper straight cylinder, as shown in the abstract figure.
Fig. 2 is a schematic diagram of a single cell structure of the present invention, wherein a is a front view, b is a left view, c is a top view, and d is an axonometric view.
Fig. 3 is a schematic perspective view of the device of the present invention.
In the figure: a support table (1); a lower straight cylinder (2); a thin shell (3); an upper straight cylinder (4).
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, the one-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic materials comprises n same single cell units which are connected in sequence from left to right, wherein n is more than or equal to 1; each single-cell unit is composed of two semi-cells which are vertically symmetrical, and each semi-cell comprises a support platform (1), a lower straight cylinder (2), a thin shell (3) and an upper straight cylinder (4); the top of the supporting table (1) is connected with a lower straight cylinder (2), the lower straight cylinder (2) is connected with a thin shell (3), the thin shell (3) is connected with an upper straight cylinder (4), and the upper straight cylinder (4) is connected with the bottom of the supporting table (1).
The supporting table (1) is of a rectangular structure, and four chamfers are arranged at four corners of the supporting table to facilitate arrangement; the lower straight cylinder (2) is of a cylindrical structure, the interior of the lower straight cylinder is hollow, one end of the lower straight cylinder is connected with the supporting platform (1), and the other end of the lower straight cylinder is connected with the thin shell (3); the thin shell (3) is of a conical structure, the interior of the thin shell is hollow, one end of the thin shell is connected with the lower straight cylinder (2), and the other end of the thin shell is connected with the upper straight cylinder (4); the upper straight cylinder (4) is of a cylindrical structure, the interior of the upper straight cylinder is hollow, one end of the upper straight cylinder is connected with the thin shell (3), and the other end of the upper straight cylinder is connected with the supporting platform (1).
The utility model discloses a compression and the bending of thin-shell (3) and the outside extension of straight section of thick bamboo (2) down consume the vibration energy, reach the effect that the damping was power consumptive, realize that the structure has big deformation and the sound absorption characteristic of making an uproar that falls, can be used to the ultralow frequency of high-precision instruments such as aerospace, boats and ships, military affairs, satellite and vibrate in, possess self preservation and protect the effect.
When the structure is designed, firstly, the size parameters of the half unit cell are determined, so that the half unit cell just realizes zero rigidity at a balance position, then the half unit cell and the half unit cell form a single cell in an up-down series connection mode, therefore, the structure has large deformation, the structure can generate large deformation to resist external impact, reduce noise and absorb sound and the like after being vibrated, and the structure can return to the original integrated state after being unloaded.
The utility model discloses accessible structural design satisfies the ultralow frequency vibration isolation requirement of high-precision instrument, makes the rigidity of its structure controllable, and the mode preparation that accessible 3D printed is zero or near zero realization quasi-zero rigidity along with the change of compression volume control its rigidity promptly.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A one-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic materials is characterized by comprising n same single cell units which are connected in sequence from left to right, wherein n is more than or equal to 1; each single-cell unit is composed of two semi-cells which are vertically symmetrical, and each semi-cell comprises a support platform (1), a lower straight cylinder (2), a thin shell (3) and an upper straight cylinder (4); the top of the supporting table (1) is connected with a lower straight cylinder (2), the lower straight cylinder (2) is connected with a thin shell (3), the thin shell (3) is connected with an upper straight cylinder (4), and the upper straight cylinder (4) is connected with the bottom of the supporting table (1).
2. The nonlinear vibration isolation device with one-dimensional quasi-zero stiffness metamaterial based on elastic materials as claimed in claim 1, wherein the support table (1) is a rectangular structure, and four chamfers are arranged at four corners of the rectangular structure for facilitating arrangement.
3. The nonlinear vibration isolation device with one-dimensional quasi-zero stiffness metamaterial based on elastic materials as claimed in claim 1, wherein the lower straight cylinder (2) is of a cylindrical structure, the interior of the lower straight cylinder is hollow, and the thickness of the lower straight cylinder (2) is the same as that of the thin shell (3); one end of the lower straight cylinder (2) is connected with the support table (1) to facilitate array, and the other end is connected with the thin shell (3).
4. The nonlinear vibration isolation device with one-dimensional quasi-zero stiffness and metamaterial based on elastic materials as claimed in claim 1, wherein the thin shell (3) is of a conical structure, the interior of the thin shell is hollow, and the thickness of the thin shell (3) is the same as that of the lower straight cylinder (2) and the upper straight cylinder (4); one end of the thin shell (3) is connected with the lower straight cylinder (2), and the other end is connected with the upper straight cylinder (4).
5. The nonlinear vibration isolation device with one-dimensional quasi-zero stiffness metamaterial based on elastic materials as claimed in claim 1, wherein the upper straight cylinder (4) is of a cylindrical structure, the interior of the upper straight cylinder is hollow, and the thickness of the upper straight cylinder (4) is the same as that of the thin shell (3); one end of the upper straight cylinder (4) is connected with the thin shell (3), and the other end is connected with the supporting platform (1), so that the array is convenient.
6. The nonlinear vibration isolation device with one-dimensional quasi-zero stiffness based on elastic material as claimed in claim 1, wherein the supporting platform (1) is made of harder tpu material, and the lower straight cylinder (2), the thin shell (3) and the upper straight cylinder (4) are made of rubber superelastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220660095.XU CN217301390U (en) | 2022-03-21 | 2022-03-21 | One-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220660095.XU CN217301390U (en) | 2022-03-21 | 2022-03-21 | One-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic material |
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| CN217301390U true CN217301390U (en) | 2022-08-26 |
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| CN202220660095.XU Expired - Fee Related CN217301390U (en) | 2022-03-21 | 2022-03-21 | One-dimensional quasi-zero stiffness metamaterial nonlinear vibration isolation device based on elastic material |
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- 2022-03-21 CN CN202220660095.XU patent/CN217301390U/en not_active Expired - Fee Related
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Granted publication date: 20220826 |