Oscillator spring structure, resonance unit body constructed using a buckling structure, and metamaterial

Abstract

The present invention relates to an oscillator spring structure, a resonance unit body constructed by using a buckling structure, and a metamaterial. The oscillator spring structure includes an inner wall, an outer wall, and buckling beams. Both the inner wall and the outer wall are circular rings. The inner wall is coaxially sleeved inside the outer wall and a uniform annular gap is formed between the inner wall and the outer wall. A plurality of buckling beams are arranged in the annular gap. Two ends of each buckling beam are fixedly connected to the outer surface of the inner wall and the inner surface of the outer wall respectively. The plurality of buckling beams are all arranged obliquely in the counterclockwise direction or all arranged obliquely in the clockwise direction. The oscillator spring structure of the present invention has a simple structure. Through the structural buckling of the buckling beams, the stiffness changes of the oscillator and the main structure connected to the oscillator spring structure can be realized, the bandgap frequency, the bandgap width, and the vibration damping performance of the entire vibration damping system can be adjusted, and vibration damping in the axial direction can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of vibration control, and in particular, to an oscillator spring structure, a resonance unit body constructed by using a buckling structure, and a metamaterial. Background Art

[0002] The processing and manufacturing of precision instruments and meters have put forward more stringent requirements for vibration control. Common vibration control methods include vibration absorption, vibration isolation, damping, vibration elimination, etc. Vibration reduction through local resonance structures is a new method proposed in the early 21st century. This method overcomes the limitation of the Bragg condition (that is, the lattice size of a phononic crystal must be greater than half of the wavelength to obtain a band gap), and can achieve a low-frequency band gap under the condition of a small lattice size. However, in order to obtain a lower vibration reduction band gap, the mass of the oscillator in the traditional local resonance structure will become very large and the connection stiffness will also be very small, which makes the entire structure bulky and overly soft. Summary of the Invention

[0003] In order to solve one or several of the technical problems existing in the prior art, the present invention provides an oscillator spring, a resonance unit body constructed by using a buckling structure, and a metamaterial.

[0004] The oscillator spring structure includes an inner wall, an outer wall, and buckling beams. Both the inner wall and the outer wall are circular rings. The inner wall is coaxially sleeved inside the outer wall and forms a uniform annular gap with the outer wall. A plurality of buckling beams are provided in the annular gap. Two ends of each buckling beam are respectively fixedly connected to the outer surface of the inner wall and the inner surface of the outer wall. The plurality of buckling beams are all arranged obliquely in the counterclockwise direction or all in the clockwise direction.

[0005] The beneficial effect of the present invention is that the oscillator spring structure of the present invention has a simple structure. Through the structural buckling of the buckling beams, the stiffness changes of the oscillator and the main structure connected to the oscillator spring structure can be realized, the band gap frequency, band gap width, and vibration reduction performance of the entire vibration reduction system can be adjusted, and vibration reduction in the axial direction can be achieved.

[0006] On the basis of the above technical solution, the present invention can be further improved as follows.

[0007] Further, the axial thickness of the inner wall is the same as the axial thickness of the outer wall; the buckling beam is sheet-shaped and extends along the axial direction of the inner wall, and the axial thickness of the inner wall is the same as the width of the buckling beam along the axial direction of the inner wall.

[0008] The beneficial effect of adopting the above further solution is that it is beneficial to the stability of the entire oscillator spring structure.

[0009] Further, the angle θ between the plurality of buckling beams and the tangent line at the connected inner wall is the same, and the θ is 0 to 90°.

[0010] Furthermore, the buckling beam is in a parabolic shape. Taking the connection point between the buckling beam and the inner wall as the origin and the straight line where the two ends of the buckling beam are located as the x-axis to establish a coordinate system, the driving equation of the buckling beam is y = -h1 / 2 * [1 - cos(2πx / l1)], where h1 is the vertex height of the buckling beam and l1 is the span of the buckling beam.

[0011] The beneficial effect of adopting the above further solution is: the shape of the buckling beam is defined by the driving equation.

[0012] The resonance unit body one constructed by using the buckling structure includes a first oscillator, a first main spring, a first main structure, a first main structure spring and a second main structure spring which are coaxially arranged. The first main spring, the first main structure spring and the second main structure spring all adopt the above-mentioned oscillator spring structure; the first oscillator, the first main spring, the first main structure spring and the second main structure spring are all in a circular ring shape. The first main spring is sleeved and fixed on the inner side wall of the first oscillator. The first main structure is sleeved and fixed on the inner side wall of the first main spring. A support shaft is provided at the central position of the first main structure. The axial two ends of the support shaft respectively protrude from the axial two ends of the first main structure. The first main structure spring and the second main structure spring are respectively located on both sides of the first main structure axially and are sleeved and fixed at both ends of the support shaft.

[0013] The beneficial effect of the present invention is: the resonance unit body constructed by using the buckling structure of the present invention realizes the change of the stiffness of the structure through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing the vibration reduction in the straight line direction of the axis.

[0014] Furthermore, the first main structure spring and the second main structure spring have the same size, and the axial thickness of the first oscillator, the axial thickness of the first main spring, the axial thickness of the first main structure and the axial thickness of the first main structure spring are all the same.

[0015] Furthermore, the outer diameter of the first main structure spring is smaller than the outer diameter of the first main structure; the first main structure includes a main structure ring which is coaxially arranged with the support shaft, and the main structure ring and the outer side wall of the support shaft are connected and fixed by radially arranged spokes.

[0016] The second resonant unit body constructed by using the buckling structure includes a second oscillator, a second main spring, and a second main structure arranged coaxially. The second main spring adopts the oscillator spring structure described above. The second main spring is sleeved and fixed on the inner side wall of the second oscillator, and the second main structure is sleeved and fixed on the inner side wall of the second main spring. The second oscillator, the second main spring, and the second main structure all adopt an annular structure, and the axial thickness of the second oscillator is the same as that of the second main spring. Both sides of the second main structure extend from both sides of the second main spring by the same length, and the axial thickness of the second main structure is greater than twice the axial thickness of the second main spring.

[0017] The beneficial effects of the present invention are as follows: The resonant unit body constructed by using the buckling structure of the present invention realizes the change of the structure stiffness through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing the vibration reduction in the linear direction of the axis.

[0018] The resonant metamaterial constructed by using the buckling structure includes a linear optical axis, a plurality of the first resonant unit bodies constructed by using the buckling structure, and a plurality of the second resonant unit bodies constructed by using the buckling structure. The plurality of the first resonant unit bodies constructed by using the buckling structure and the plurality of the second resonant unit bodies constructed by using the buckling structure are coaxially sleeved on the linear optical axis and arranged alternately. The first main structure spring and the second main structure spring connected to the first main structure are respectively sleeved and fixed in two adjacent second main structures.

[0019] The beneficial effects of the present invention are as follows: The resonant metamaterial constructed by using the buckling structure of the present invention realizes the change of the structure stiffness through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing the vibration reduction in the linear direction of the axis.

[0020] Furthermore, the first oscillator adopts the same structural dimensions as the second oscillator, and the second main spring adopts the same structural dimensions as the first main spring. Description of the Drawings

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a structure of the oscillator spring structure of the present invention;

[0022] Figure 2 It is a front view structural schematic diagram of a structure of the oscillator spring structure of the present invention;

[0023] Figure 3 It is a connection structure schematic diagram of the inner wall and the buckling beam of a structure of the oscillator spring structure of the present invention;

[0024] Figure 4 It is a front view structural schematic diagram of a structure of the oscillator spring structure of the present invention in the buckling deformation state;

[0025] Figure 5 Schematic three-dimensional structure diagram of another structure of the oscillator spring structure of the present invention;

[0026] Figure 6 Schematic front view structure diagram of another structure of the oscillator spring structure of the present invention;

[0027] Figure 7 Schematic connection structure diagram of the inner wall and the buckling beam of another structure of the oscillator spring structure of the present invention;

[0028] Figure 8 Schematic front view structure diagram of another structure of the oscillator spring structure of the present invention in the buckling deformation state;

[0029] Figure 9 Schematic front view structure diagram of the first resonance unit body constructed by the present invention using the buckling structure;

[0030] Figure 10 Schematic three-dimensional structure diagram of the first resonance unit body constructed by the present invention using the buckling structure Figure 1 ;

[0031] Figure 11 Schematic three-dimensional structure diagram of the first resonance unit body constructed by the present invention using the buckling structure Figure 2 ;

[0032] Figure 12 Schematic side view structure diagram of the first resonance unit body constructed by the present invention using the buckling structure;

[0033] Figure 13 Schematic three-dimensional structure diagram of the first oscillator of the present invention;

[0034] Figure 14 Schematic front view structure diagram of the first main structure of the present invention;

[0035] Figure 15 Schematic three-dimensional structure diagram of the first main structure of the present invention;

[0036] Figure 16 Schematic front view structure diagram of the second resonance unit body constructed by the present invention using the buckling structure;

[0037] Figure 17 Schematic three-dimensional structure diagram of the second resonance unit body constructed by the present invention using the buckling structure;

[0038] Figure 18 Schematic side view structure diagram of the second resonance unit body constructed by the present invention using the buckling structure;

[0039] Figure 19 Schematic front view structure diagram of the second main structure of the present invention;

[0040] Figure 20Schematic side view structure of the combination of resonance unit one constructed by using the buckling structure and resonance unit two constructed by using the buckling structure according to the present invention;

[0041] Figure 21 Schematic perspective view structure of the combination of resonance unit one constructed by using the buckling structure and resonance unit two constructed by using the buckling structure according to the present invention Figure 1 ;

[0042] Figure 22 Schematic perspective view structure of the combination of resonance unit one constructed by using the buckling structure and resonance unit two constructed by using the buckling structure according to the present invention Figure 2 ;

[0043] Figure 23 Schematic side view structure of the resonant metamaterial constructed by using the buckling structure according to the present invention;

[0044] Figure 24 Schematic three - dimensional structure of the resonant metamaterial constructed by using the buckling structure according to the present invention;

[0045] Figure 25 Bandgap diagrams of the resonant metamaterial constructed by using the buckling structure according to the present invention in different states.

[0046] In the drawings, the list of components represented by each reference numeral is as follows:

[0047] 1. Oscillator spring structure; 11. Inner wall; 12. Outer wall; 13. Buckling beam; 2. Resonance unit one; 21. First oscillator; 22. First main spring; 23. First main structure; 24. First main structure spring; 25. Second main structure spring; 26. Support shaft; 27. Spoke; 3. Resonance unit two; 31. Second oscillator; 32. Second main spring; 33. Second main structure; 4. Linear optical axis. Detailed implementation manners

[0048] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0049] As Figures 1 to 8 shown, the oscillator spring structure 1 of this embodiment includes an inner wall 11, an outer wall 12 and a buckling beam 13. Both the inner wall 11 and the outer wall 12 are circular - ring - shaped. The inner wall 11 is coaxially sleeved inside the outer wall 12 and a uniform annular gap is formed between the inner wall 11 and the outer wall 12. A plurality of buckling beams 13 are arranged in the annular gap. Both ends of the buckling beam 13 are fixedly connected to the outer surface of the inner wall 11 and the inner surface of the outer wall 12 respectively. A plurality of the buckling beams 13 are all arranged obliquely in the counter - clockwise direction or all in the clockwise direction.

[0050] As Figure 1As shown, the axial thickness of the inner wall 11 in this embodiment is the same as that of the outer wall 12; the buckling beam 13 is sheet-shaped and extends along the axis of the inner wall 11, and the axial thickness of the inner wall 11 is the same as the width of the buckling beam 13 along the axis of the inner wall 11. This is beneficial to the stability of the entire oscillator spring structure.

[0051] As Figure 3 and Figure 7 shown, the included angle θ between the multiple buckling beams in this embodiment and the tangent line at the connected inner wall is the same, and the θ is 0 to 90°.

[0052] As Figure 3 and Figure 7 shown, the buckling beam 13 in this embodiment is in a parabola-like shape. Taking the connection point of the buckling beam 13 and the inner wall 11 as the origin and the straight line where the two ends of the buckling beam 13 are located as the x-axis to establish a coordinate system, the driving equation of the buckling beam 13 is y = -h1 / 2 * [1 - cos(2πx / l1)], where h1 is the vertex height of the buckling beam 13 and l1 is the span of the buckling beam 13. The shape of the buckling beam is defined by the driving equation.

[0053] The oscillator spring structure in this embodiment has a simple structure. Through the structural buckling of the buckling beam, the stiffness change of the oscillator and the main structure connected to the oscillator spring structure can be realized, and the bandgap frequency, bandgap width and damping performance of the entire damping system can be adjusted to achieve damping in the axial direction.

[0054] Embodiment 2

[0055] As Figures 9 to 15 shown, the resonance unit body 2 constructed by using the buckling structure in this embodiment includes a coaxially arranged first oscillator 21, a first main spring 22, a first main structure 23, a first main structure spring 24 and a second main structure spring 25. The first main spring 22, the first main structure spring 24 and the second main structure spring 25 all adopt the above-mentioned oscillator spring structure 1; the first oscillator 21, the first main spring 22, the first main structure spring 24 and the second main structure spring 25 are all circular rings. The first main spring 22 is sleeved and fixed on the inner side wall of the first oscillator 21. The first main structure 23 is sleeved and fixed on the inner side wall of the first main spring 22. A support shaft 26 is provided at the central position of the first main structure 23. The axial two ends of the support shaft 26 respectively protrude from the axial two ends of the first main structure 23. The first main structure spring 24 and the second main structure spring 25 are respectively located on both sides of the first main structure 23 in the axial direction and are sleeved and fixed at both ends of the support shaft.

[0056] As Figures 9 to 12As shown, the first main structure spring 24 and the second main structure spring 25 of this embodiment have the same dimensions, and the axial thickness of the first oscillator 21, the axial thickness of the first main spring 22, the axial thickness of the first main structure 23, and the axial thickness of the first main structure spring 24 are all the same.

[0057] As Figures 9 to 12 shown, the outer diameter of the first main structure spring 24 of this embodiment is smaller than the outer diameter of the first main structure 23; the first main structure 23 includes a main structure ring, the main structure ring is coaxially arranged with the support shaft 26, and the main structure ring and the outer side wall of the support shaft 26 are connected and fixed by radially arranged spokes 27.

[0058] Specifically, the outer shape of the first oscillator is a ring with an outer diameter of d4, an inner diameter of d3, a thickness of b1, and a mass of m; the outer shape of the first main spring 22 is a ring-like structure, with an outer diameter of d3 and an inner diameter of d1. The thickness of the inner wall and the outer wall of the first main spring 22 is b1, and the outer diameter of the inner wall is d2. Among them, the outer diameter d3 of the first main spring 22 is equal to the inner diameter d2 of the first oscillator. The driving equation of the buckling beam in the first main spring is y1 = -h1 / 2 * [1 - cos(2πx / l1)], where h1 is the vertex height, l1 is the span of the buckling beam, the thickness of the buckling beam is t1, and the angle between the buckling beam and the tangent of the inner wall is θ1; the axial stiffness of the first main spring 22 in the static state is k1, and the axial stiffness of the inner wall and the outer wall of the first main spring 22 in the relative torsion state is k2. By adjusting the parameters of the above driving equation, the axial stiffness of the first main spring in two states can be changed.

[0059] As Figure 14 shown, the inner diameter D5, outer diameter d1, and thickness b1 of the main structure ring of the first main structure, the inner diameter D1 and outer diameter D2 of the support shaft; the outer diameter d1 of the main structure ring is the same as the inner diameter of the first main spring; the first main structure spring and the second main structure spring are ring-like, with an outer diameter D4, an inner diameter D2, and a thickness b1; the outer diameter of the inner wall of the first main structure spring and the second main structure spring is D3, and the outer diameter D4 of the first main structure spring and the second main structure spring is equal to the inner diameter D4 of the second main structure; the first main structure spring and the second main structure spring have two states. In the first state, as Figure 5 shown, its axial stiffness is K1, and the second state is obtained by the relative torsion of the inner and outer walls. As Figure 8As shown, its axial stiffness is K2. The driving equations of the buckling beams of the first main structure spring and the second main structure spring are both y2 = -h2 / 2 * [1 - cos(2πx2 / l2)], where h2 is the vertex height, l2 is the span of the buckling beam, the thickness of the buckling beam is t2, and the angle between the buckling beam and the tangent of the inner wall is θ2; by adjusting the above parameters, the axial stiffness in two states of the first main structure spring and the second main structure spring can be changed.

[0060] The resonance unit body constructed by using the buckling structure in this embodiment realizes the change of the structure stiffness through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing vibration reduction in the axial straight direction.

[0061] Embodiment 3

[0062] As Figures 16 to 19 As shown, the resonance unit body two 3 constructed by using the buckling structure in this embodiment includes a second oscillator 31, a second main spring 32, and a second main structure 33 arranged coaxially. The second main spring 32 adopts the above-mentioned oscillator spring structure; the second main spring 32 is sleeved and fixed on the inner side wall of the second oscillator 31, the second main structure 33 is sleeved and fixed on the inner side wall of the second main spring 32. The second oscillator 31, the second main spring 32, and the second main structure 33 all adopt an annular structure, and the axial thickness of the second oscillator 31 is the same as the axial thickness of the second main spring 32; both sides of the second main structure 33 extend the same length from both sides of the second main spring 32, and the axial thickness of the second main structure 33 is greater than twice the axial thickness of the second main spring 32.

[0063] The resonance unit body constructed by using the buckling structure in this embodiment realizes the change of the structure stiffness through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing vibration reduction in the axial straight direction.

[0064] Embodiment 4

[0065] As Figures 20 to 24 As shown, the resonance metamaterial constructed by using the buckling structure in this embodiment includes a linear optical axis 4, a plurality of the resonance unit bodies one 2 constructed by using the buckling structure, and a plurality of the resonance unit bodies two 3 constructed by using the buckling structure. The plurality of the resonance unit bodies one 2 and the plurality of the resonance unit bodies two 3 are coaxially sleeved on the linear optical axis 4 and arranged alternately; the first main structure spring 24 and the second main structure spring 25 connected to the first main structure 23 are respectively sleeved and fixed in two adjacent second main structures 33. The linear optical axis 4 in this embodiment can make the resonance unit body one 2 and the resonance unit body two 3 coaxial.

[0066] As Figures 20 to 24As shown, the first oscillator 21 of this embodiment adopts the same structural dimensions as the second oscillator 31, and the second main spring 32 adopts the same structural dimensions as the first main spring 22.

[0067] The resonant metamaterial constructed by using the buckling structure in this embodiment realizes the change of the structural stiffness through structural buckling, thereby adjusting the vibration isolation bandwidth, adjusting the bandgap width, and realizing vibration reduction in the linear direction of the axis.

[0068] The finite element simulation software was used to simulate the bandgap change of the resonant metamaterial. There are two resonant unit bodies, namely resonant unit body one and resonant unit body two, used in the simulation. The properties of the materials used for each part are as follows. The linear optical axis 4 uses chrome-plated optical axis material. The first main spring 22, the first main structural spring 24, the second main structural spring 25, and the second main spring 32 use thermoplastic polyurethane elastomer (TPU95A) material, with a density of 1.28 g / cm 3 , an elastic modulus of 28.22 Mpa, and a Poisson's ratio of 0.47. The other parts use resin material, with a density of 1.12 g / cm 3 , an elastic modulus of 2650 Mpa, and a Poisson's ratio of 0.42. The geometric dimensions of each part are set as follows. As Figure 1 , Figure 2 and Figure 3 shown, the geometric parameters of the first main spring 22 and the second main spring 32 are set as b1 = 12.5 mm, d1 = 98.4 mm, d2 = 100 mm, d3 = 147.5 mm, l1 = 30 mm, t1 = 0.8 mm, h1 = 2.4 mm, θ1 = 37.5°. As Figure 5 , Figure 6 and Figure 7 shown, the geometric parameters of the first main structural spring 24 and the second main structural spring 25 are set as b1 = 12.5 mm, D2 = 28.4 mm, D3 = 30 mm, D4 = 82.6 mm, l2 = 30 mm, t2 = 0.8 mm, h2 = 2.4 mm, θ2 = 32.5°. As Figure 13 shown, the geometric parameters of the first oscillator 21 and the second oscillator 31 are set as b1 = 12.5 mm, d3 = 147.5 mm, d4 = 175.5 mm, and the total volume is about 89 cm 3 . As Figure 14 and Figure 15 shown, the geometric parameters of the first main structure 23 are set as b1 = 12.5 mm, d1 = 98.4 mm, D1 = 12 mm, D2 = 28.4 mm, D5 = 94.4 mm, and the total volume is about 71 cm 3 . As Figure 19 shown, the geometric parameters of the second main structure 33 are set as d1 = 98.4 mm, D4 = 82.6 mm, and the total volume is about 71 cm 3。

[0069] The simulation results are as Figure 25 shown. The abscissa represents the response frequency (unit: Hertz), and the ordinate represents the transmissibility (output response amplitude / input amplitude). When the ordinate of a certain point is less than zero, it means that the output response is reduced at that frequency, and vice versa, it means that the output response is amplified. The shaded part represents the bandgap. The left side of the shaded area represents the starting frequency of the bandgap, and the right side represents the cut-off frequency. The difference between the two represents the bandgap width. The "00 state", "01 state", "10 state", and "11 state" in the figure have the following meanings: The first digit represents the state of the second main structure spring 25 and the second main spring 32 ( Figure 5 and Figure 8 ), and the second digit represents the state of the first main spring 22 and the second main spring 32 ( Figure 2 and Figure 4 ). "0" represents that the above-mentioned main spring is in the initial first stable state ( Figure 2 and Figure 5 ), and "1" represents that the above-mentioned main spring is in the second stable state after torsional deformation ( Figure 4 and Figure 8 ). It can be found from the figure that the frequency and width of the bandgap in the four states have changed to varying degrees, which verifies the adjustable characteristics of the bandgap of the designed metamaterial.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0071] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0072] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0074] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A resonant unit constructed using a buckling structure, characterized in that, It includes a first oscillator, a first main spring, a first main structure, a first main structure spring, and a second main structure spring which are coaxially arranged. The first main spring, the first main structure spring, and the second main structure spring all adopt the oscillator spring structure. The oscillator spring structure includes an inner wall, an outer wall, and buckling beams. Both the inner wall and the outer wall are circular rings. The inner wall is coaxially sleeved inside the outer wall and a uniform annular gap is formed between them. A plurality of buckling beams are arranged in the annular gap. The two ends of each buckling beam are respectively fixedly connected to the outer surface of the inner wall and the inner surface of the outer wall. A plurality of the buckling beams are all arranged obliquely in the counterclockwise direction or all in the clockwise direction. The first oscillator, the first main spring, the first main structure spring, and the second main structure spring are all circular rings. The first main spring is sleeved and fixed on the inner side wall of the first oscillator. The first main structure is sleeved and fixed on the inner side wall of the first main spring. A support shaft is provided at the central position of the first main structure. The axial two ends of the support shaft respectively protrude from the axial two ends of the first main structure. The first main structure spring and the second main structure spring are respectively located on both sides of the first main structure axially and are sleeved and fixed at both ends of the support shaft.

2. The resonant unit constructed by using the buckling structure according to claim 1, characterized in that, The first main structure spring and the second main structure spring have the same size. The axial thickness of the first oscillator, the axial thickness of the first main spring, the axial thickness of the first main structure, and the axial thickness of the first main structure spring are all the same.

3. The resonant unit constructed using the buckling structure according to claim 1, characterized in that, The outer diameter of the first main structure spring is smaller than the outer diameter of the first main structure. The first main structure includes a main structure circular ring which is coaxially arranged with the support shaft. The main structure circular ring and the outer side wall of the support shaft are connected and fixed through radially arranged spokes.

4. The resonant unit constructed by using the buckling structure according to any one of claims 1 to 3, characterized in that The axial thickness of the inner wall is the same as the axial thickness of the outer wall. The buckling beam is sheet-shaped and extends axially along the inner wall. The axial thickness of the inner wall is the same as the width of the buckling beam along the axial direction of the inner wall.

5. The resonant unit constructed using the buckling structure according to any one of claims 1 to 3, characterized in that, The included angle θ between a plurality of buckling beams and the tangent line at the inner wall where they are connected is the same, and the θ is 0 to 90°.

6. The resonant unit constructed using the buckling structure according to any one of claims 1 to 3, characterized in that, The buckling beam is in a parabolic-like shape. Taking the connection point of the buckling beam and the inner wall as the origin and the straight line where the two ends of the buckling beam are located as the x-axis to establish a coordinate system, the driving equation of the buckling beam is y = -h1 / 2 * [1 - cos(2πx / l1)], where h1 is the vertex height of the buckling beam and l1 is the span of the buckling beam.

7. A resonant metamaterial constructed using a buckling structure, characterized in that, It includes a plurality of first resonance unit bodies, a linear optical axis, and a plurality of second resonance unit bodies. A plurality of first resonance unit bodies adopt the resonance unit bodies constructed by using the buckling structure as described in any one of claims 1 to 6. A plurality of first resonance unit bodies and a plurality of second resonance unit bodies are coaxially sleeved on the linear optical axis and are arranged alternately. The second resonance unit includes a second oscillator, a second main spring, and a second main structure arranged coaxially, and the second main spring adopts the oscillator spring structure; the second main spring is sleeved and fixed on the inner side wall of the second oscillator, the second main structure is sleeved and fixed on the inner side wall of the second main spring, the second oscillator, the second main spring, and the second main structure all adopt an annular structure, and the axial thickness of the second oscillator is the same as the axial thickness of the second main spring; both sides of the second main structure extend from both sides of the second main spring by the same length, and the axial thickness of the second main structure is greater than twice the axial thickness of the second main spring; The first main structure spring and the second main structure spring connected to the first main structure are respectively sleeved and fixed in two adjacent second main structures.

8. The resonant metamaterial constructed using the buckling structure according to claim 7, characterized in that, The first oscillator adopts the same structural dimensions as the second oscillator, and the second main spring adopts the same structural dimensions as the first main spring.

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