High bearing broadband vibration isolation device and system based on spider-web-like metamaterial structure

Abstract

The application discloses a high-bearing broadband vibration isolation device and system based on a spider-web-imitating metamaterial structure, which comprises a central bearing pedestal, a radial bearing assembly and a circumferential vibration suppression structure assembly; the radial bearing assembly comprises a plurality of radial support structures arranged in a ring direction periodically around the central bearing pedestal; the circumferential vibration suppression structure assembly is arranged in a net ring mode along the central bearing pedestal, and the circumference increases in a preset mode; each circumferential vibration suppression structure assembly comprises a plurality of linear strip-shaped vibration suppression units; the two ends of each linear strip-shaped vibration suppression unit are connected with two adjacent radial support structures respectively, and the connecting points are located between the first end and the second end of the corresponding radial support structure. The application is applied to the technical field of new materials and new structures for vibration and noise control, can realize low-frequency broadband vibration isolation effect under high bearing / small size, is convenient to process, and can be quickly adjusted and improved according to actual control requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new materials and new structure of vibration and noise control, and particularly relates to a high-load-bearing broadband vibration isolation device and system based on a spider-web-imitating metamaterial structure. BACKGROUND

[0002] Vibration problems exist widely in human production and life, and the vibration problems of modern high-end equipment such as airplanes, high-speed trains, ships and precision machine tools are more prominent, and the vibration problems have seriously affected the key core performance indicators such as ride comfort and manufacturing precision of the modern high-end equipment.

[0003] Vibration isolation technology is an important means to control equipment vibration problems. In engineering practice, traditional vibration isolation technologies mainly include damping vibration reduction technology (such as constrained damping material), vibration absorption technology (such as active vibration absorber) and vibration isolation technology (such as floating raft vibration isolation system). These traditional vibration isolation technologies have many advantages, but also have many deficiencies and limitations; for example, the traditional damping vibration reduction technology can achieve good vibration isolation effect at medium and high frequencies, but its low-frequency performance is poor; the action frequency of the traditional vibration absorption technology can be very low, but its action frequency band is very narrow; the traditional vibration isolation technology can achieve high bearing capacity, low-frequency performance or small size alone, but it cannot simultaneously achieve high bearing capacity and low-frequency performance in small size. Therefore, the traditional vibration isolation technology cannot meet the diversified vibration isolation needs of equipment, and how to achieve low-frequency broadband vibration isolation control of equipment under high bearing capacity / small size is an engineering and scientific research problem that needs to be solved in the field of vibration and noise control.

[0004] In recent years, the mechanical / acoustic metamaterial technology has developed rapidly. Acoustic metamaterials are new composite materials / structures composed of specially designed microstructure units, and have a series of super-ordinary elastic wave regulation characteristics such as low-frequency elastic wave band gap, negative density, negative modulus and negative refraction. The existing acoustic metamaterial technology research shows that the super-ordinary elastic wave regulation ability of the metamaterial structure can achieve "small size controlling low frequency and large wavelength", which provides a new idea for solving the low-frequency vibration isolation problem under small size. SUMMARY

[0005] The purpose of the present application is to solve the problems in the background art, that is, how to achieve efficient low-frequency broadband vibration isolation control of equipment under high bearing capacity / small size. To solve the above problems, the present application draws on the idea of acoustic metamaterials and combines the principle of spider-web-imitating, and proposes a high-load-bearing broadband vibration isolation device and system based on a spider-web-imitating metamaterial structure, which can achieve low-frequency broadband vibration isolation effect under high bearing capacity / small size.

[0006] To achieve the above object, the application provides a high-load broadband vibration isolation device based on a spider-web-like metamaterial structure, comprising a central bearing pedestal, radial bearing assemblies and circumferential vibration suppression structure assemblies.

[0007] The radial bearing assemblies comprise a plurality of radial support structures, the first ends of the radial support structures being connected to the central bearing pedestal and being arranged in a ring shape around the central bearing pedestal at a certain angle;

[0008] The circumferential vibration suppression structure assemblies are arranged in a ring shape along the central bearing pedestal, and the circumferences of the circumferential vibration suppression structure assemblies increase in a preset manner from inside to outside;

[0009] Each of the circumferential vibration suppression structure assemblies comprises a plurality of linear strip-shaped vibration suppression units, and each of the linear strip-shaped vibration suppression units comprises at least two weak-rigidity elastic parts and at least one high-rigidity mass part;

[0010] The two ends of each of the linear strip-shaped vibration suppression units are connected to two adjacent radial support structures respectively, and the connection points are located between the first ends and the second ends of the radial support structures.

[0011] In one of the embodiments, the weak-rigidity elastic parts and the high-rigidity mass parts are connected in series in the same linear strip-shaped vibration suppression unit.

[0012] Each end of the linear strip-shaped vibration suppression unit is connected to the radial support structure through at least one weak-rigidity elastic part.

[0013] In one of the embodiments, the weak-rigidity elastic part is a single elastic element; or

[0014] The weak-rigidity elastic part is composed of at least two elastic elements connected in parallel and / or in series.

[0015] In one of the embodiments, the linear strip-shaped vibration suppression unit has a rotational degree of freedom on the radial support structure, so that the size of the main vibration plane and the resonance frequency of the linear strip-shaped vibration suppression unit can be changed by rotating the linear strip-shaped vibration suppression unit.

[0016] In one of the embodiments, the neutral axes of the radial support structures are located on the same plane or approximately on the same plane.

[0017] In one of the embodiments, the central bearing pedestal is a solid cylinder, a hollow cylinder, a beam assembly, a rod assembly or a plate assembly; or

[0018] The central bearing pedestal is a combination of beams, rods and plates.

[0019] In one of the embodiments, the radial support structure is a rod-like structure; or

[0020] The radial support structure is a beam structure with local stiffeners and / or local perforations; or

[0021] The radial support structure is a composite structure.

[0022] In one embodiment, a spacing is left between each of the circumferential vibration suppression structure assemblies.

[0023] From inside to outside, the circumferences of each of the circumferential vibration suppression structure assemblies increase proportionally, or increase proportionally in segments, or increase proportionally in cycles.

[0024] To achieve the above-mentioned purposes, the application further provides a high-load wide-frequency vibration isolation system based on a spider-web-like metamaterial structure, comprising at least two of the above-mentioned vibration isolation devices, and each of the vibration isolation devices is connected in series and / or in parallel.

[0025] If the two vibration isolation devices are connected in series, the two vibration isolation devices are connected through a longitudinal connecting part.

[0026] If the two vibration isolation devices are connected in parallel, the two vibration isolation devices are connected through a transverse connecting part, or the two vibration isolation devices are not connected.

[0027] In one embodiment, the central load-bearing pedestal is made of aluminum alloy, stainless steel, PVC, plastic, glass, stone or composite material.

[0028] The radial support structure is made of steel, iron, aluminum alloy, composite material, plastic, reinforced concrete or wood.

[0029] The weak stiffness elastic part is made of spring steel, aluminum alloy, nylon, non-woven fabric, fiber, rubber, silicone or resin.

[0030] The high stiffness mass part is made of copper, steel, iron, glass, stone, aluminum alloy, tungsten alloy, ceramic or plastic.

[0031] The longitudinal connecting part and the transverse connecting part are made of steel, iron, aluminum alloy, composite material, reinforced concrete, wood or plastic.

[0032] Compared with the prior art, the application has the following beneficial technical effects:

[0033] The application can adjust the rigidity of the weak rigidity elastic part, the layout form, change the size and layout position of the high rigidity mass part, adjust the rotation angle of the linear strip-shaped vibration suppression unit, modulate the circumference gradient of the circumferential vibration suppression structure assembly, and cooperatively design the lattice, configuration and coupling relationship of the center bearing pedestal, the radial bearing assembly and the circumferential vibration suppression structure assembly of the spider web, so that the resonance frequency of each linear strip-shaped vibration suppression unit is staggered and extended, the overall vibration suppression device vibration suppression band is distributedly widened, and the bearing capacity is coupled and enhanced. The structure has the advantages of low frequency ultra-wide band, high rigidity, high strength, small device system thickness size, compact structure and wide and flexible design space. The vibration wave can be effectively blocked and suppressed from being transmitted to high-end equipment, the failure probability and damage degree are reduced, and the stability, accuracy and reliability are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0035] Figure 1 Structure diagram of high-bearing wide-frequency vibration isolation device of spider web metamaterial structure in the embodiment of the present application;

[0036] Figure 2 First embodiment schematic diagram of linear strip-shaped vibration suppression unit in circumferential vibration suppression structure assembly in the embodiment of the present application;

[0037] Figure 3 Second embodiment schematic diagram of linear strip-shaped vibration suppression unit in circumferential vibration suppression structure assembly in the embodiment of the present application;

[0038] Figure 4 Third embodiment schematic diagram of linear strip-shaped vibration suppression unit in circumferential vibration suppression structure assembly in the embodiment of the present application;

[0039] Figure 5 Fourth embodiment schematic diagram of linear strip-shaped vibration suppression unit in circumferential vibration suppression structure assembly in the embodiment of the present application;

[0040] Figure 6 Fifth embodiment schematic diagram of linear strip-shaped vibration suppression unit in circumferential vibration suppression structure assembly in the embodiment of the present application;

[0041] Figure 7 First embodiment schematic diagram of radial support structure in the embodiment of the present application;

[0042] Figure 8 A schematic diagram of a second embodiment of the radial support structure in the embodiment of the present application;

[0043] Figure 9 A schematic diagram of a third embodiment of the radial support structure in the embodiment of the present application;

[0044] Figure 10 A schematic diagram of a first embodiment of the circumferential vibration suppression structure assembly in the embodiment of the present application;

[0045] Figure 11 A schematic diagram of a second embodiment of the circumferential vibration suppression structure assembly in the embodiment of the present application;

[0046] Figure 12 A schematic diagram of a third embodiment of the circumferential vibration suppression structure assembly in the embodiment of the present application;

[0047] Figure 13 Another embodiment of the high-load-bearing broadband vibration isolation device in the embodiment of the present application;

[0048] Figure 14 Another embodiment of the high-load-bearing broadband vibration isolation device in the embodiment of the present application;

[0049] Figure 15 Another embodiment of the high-load-bearing broadband vibration isolation device in the embodiment of the present application;

[0050] Figure 16 A schematic diagram of a series arrangement of the high-load-bearing broadband vibration isolation device in the embodiment of the present application;

[0051] Figure 17 A schematic diagram of a parallel arrangement of the high-load-bearing broadband vibration isolation device in the embodiment of the present application;

[0052] Figure 18 A vibration isolation effect diagram of an embodiment of the high-load-bearing broadband vibration isolation device in the embodiment of the present application.

[0053] The figure reference: 1 - central bearing pedestal, 2 - radial bearing assembly, 3 - circumferential vibration suppression structure assembly, 4 - radial support structure, 5 - linear strip-shaped vibration suppression unit, 6 - weak stiffness elastic part, 7 - high stiffness mass part, 8 - vibration isolation device, 9 - transverse connecting part, 10 - longitudinal connecting part.

[0054] The objectives, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0056] In addition, the technical solutions in the embodiments of the present application can be combined with each other, but the combination must be based on the fact that a person of ordinary skill in the art can realize the combination. When the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0057] Embodiment 1

[0058] As Figure 1 shown is a high-bearing broadband vibration isolation device based on a spider-web-like metamaterial structure, which mainly comprises a central bearing pedestal 1, a spider-web-like radial bearing assembly 2 and a circumferential vibration suppression structure assembly 3. The radial bearing assembly 2 comprises a plurality of radial support structures 4, the first end of each radial support structure 4 is connected to the central bearing pedestal 1, and the radial support structures 4 are arranged in a ring direction around the central bearing pedestal 1 at a certain included angle, for example, an included angle of 45 degrees, an included angle of 60 degrees, an included angle of 120 degrees, etc. The circumferential vibration suppression structure assembly 3 is arranged in a mesh ring around the central bearing pedestal 1, and the circumference of each circumferential vibration suppression structure assembly 3 increases in a predetermined manner from inside to outside.

[0059] Each circumferential vibration suppression structure assembly 3 comprises a plurality of linear strip-shaped vibration suppression units 5, each linear strip-shaped vibration suppression unit 5 comprises at least two weak stiffness elastic parts 6 and at least one high stiffness mass part 7, the two ends of each linear strip-shaped vibration suppression unit 5 are connected to two adjacent radial support structures 4 respectively, and the connection points are located between the first end and the second end of the corresponding radial support structure 4. In the same linear strip-shaped vibration suppression unit 5, the weak stiffness elastic part 6 and the high stiffness mass part 7 are connected in series, and each end of the linear strip-shaped vibration suppression unit 5 is connected to the radial support structure 4 through at least one weak stiffness elastic part 6.

[0060] In the embodiment, the vibration isolation and mitigation device is centered on the central bearing platform, and eight radial spider structures 4 are radiated outward from the central bearing platform. Seven linear vibration mitigation units 5 are connected between each of the radial spider structures 4. Each of the linear vibration mitigation units 5 is composed of two weak stiffness elastic parts 6 and one high stiffness mass part 7. The radial spider structure 4 is designed as an I-shaped member, and the web is subjected to the main shear stress. The materials of the components are all selected from PLA (polylactic acid).

[0061] In the implementation process, the weak stiffness elastic part 6 is a single elastic element; or the weak stiffness elastic part 6 is composed of at least two elastic elements in parallel and / or in series. For example, the weak stiffness elastic part 6 is composed of two elastic elements in series, three elastic elements in series, three elastic elements in parallel, two elastic elements in parallel and one elastic element in series, etc. Figures 2-5 Five kinds of linear vibration mitigation units 5 are provided in the embodiment.

[0062] Reference Figure 2 The first kind of linear vibration mitigation unit 5 includes two weak stiffness elastic parts 6 and one high stiffness mass part 7. One of the weak stiffness elastic parts 6 is located at the first end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is a single elastic element. The high stiffness mass part 7 is located at the middle position of the linear vibration mitigation unit 5. The other weak stiffness elastic part 6 is located at the second end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is a single elastic element.

[0063] Reference Figure 3 The second kind of linear vibration mitigation unit 5 includes two weak stiffness elastic parts 6 and one high stiffness mass part 7. One of the weak stiffness elastic parts 6 is located at the first end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is a single elastic element. The high stiffness mass part 7 is located at the middle position of the linear vibration mitigation unit 5. The other weak stiffness elastic part 6 is located at the second end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is composed of two elastic elements in parallel.

[0064] Reference Figure 4 The third kind of linear vibration mitigation unit 5 includes two weak stiffness elastic parts 6 and one high stiffness mass part 7. One of the weak stiffness elastic parts 6 is located at the first end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is composed of two elastic elements in parallel. The high stiffness mass part 7 is located at the middle position of the linear vibration mitigation unit 5. The other weak stiffness elastic part 6 is located at the second end of the linear vibration mitigation unit 5, and the weak stiffness elastic part 6 is composed of two elastic elements in parallel.

[0065] Reference Figure 5For the fourth embodiment of the linear strip-shaped vibration suppression unit 5, it comprises three weak stiffness elastic parts 6 and one high stiffness mass part 7. The first weak stiffness elastic part 6 is located at the first end of the linear strip-shaped vibration suppression unit 5, and the weak stiffness elastic part 6 is formed by three elastic elements in parallel. The first high stiffness mass part 7, the second weak stiffness elastic part 6 and the second high stiffness mass part 7 are connected in series and located at the middle part of the linear strip-shaped vibration suppression unit 5, wherein the second weak stiffness elastic part 6 is a single elastic element. The third weak stiffness elastic part 6 is located at the second end of the linear strip-shaped vibration suppression unit 5, and the weak stiffness elastic part 6 is formed by two elastic elements in parallel.

[0066] Reference Figure 6 For the fifth embodiment of the linear strip-shaped vibration suppression unit 5, it comprises two weak stiffness elastic parts 6 and one high stiffness mass part 7. One of the weak stiffness elastic parts 6 is located at the first end of the linear strip-shaped vibration suppression unit 5, and the weak stiffness elastic part 6 is formed by three elastic elements in parallel. The high stiffness mass part 7 is located at the middle part of the linear strip-shaped vibration suppression unit 5. The other weak stiffness elastic part 6 is located at the second end of the linear strip-shaped vibration suppression unit 5, and the weak stiffness elastic part 6 is formed by three elastic elements in parallel.

[0067] It should be noted that the embodiments of the linear strip-shaped vibration suppression unit 5 are not limited to the structure forms in the specific implementation process, but can also be other series connection structure forms. Figures 2-5

[0068] As a preferred embodiment, the linear strip-shaped vibration suppression unit 5 has a rotational freedom on the radial support structure 4, and then the size of the main vibration plane and the resonant frequency of the linear strip-shaped vibration suppression unit 5 can be changed by rotating the linear strip-shaped vibration suppression unit 5. In the specific implementation process, a rotatable rotating shaft or a bearing can be arranged at the corresponding position of the radial support structure 4 connected to the linear strip-shaped vibration suppression unit 5, and the linear strip-shaped vibration suppression unit 5 is fixedly connected to the rotating shaft or the bearing at the corresponding position of the radial support structure 4, so that the linear strip-shaped vibration suppression unit 5 has a rotational freedom on the radial support structure 4.

[0069] In the specific implementation process, the neutral axes of the radial support structures 4 are located on the same plane or approximately on the same plane, wherein the neutral axes of the radial support structures 4 are approximately located on the same plane means that the spacing between the planes where the neutral axes are located is less than 30% of the height of the radial support structure 4.

[0070] In the specific implementation process, the center bearing pedestal 1 is a solid column, a hollow column, a beam combination, a rod combination or a plate combination. Alternatively, the center bearing pedestal 1 can also be a combination of beams, rods and plates.

[0071] ​In specific implementation, the radial support structure 4 is a bar structure, such as a rectangular beam, an I-beam, a T-beam, a Z-beam, a circular tube, a square tube, a rectangular tube, a cross beam, an I-beam, an H-beam, a U-beam, a triangular truss, a beam truss, a hollow truss, or a space truss, etc. Alternatively, the radial support structure 4 can also be a beam structure with local stiffeners and / or local perforations. Alternatively, the radial support structure 4 can also be a composite structure, such as a multi-layer composite tube or a lattice sandwich beam. For example Figure 7 As shown in FIG. 1, the radial support structure 4 is an I-beam with local perforations; for another example Figure 8 As shown in FIG. 2, the radial support structure 4 is a U-beam; for another example Figure 9 As shown in FIG. 3, the radial support structure 4 is a composite structure of multi-layer plates.

[0072] In specific implementation, a spacing is left between each circumferential vibration suppression structure assembly 3, such as a spacing of 5 mm, 10 mm, 30 mm, 200 mm, or 1000 mm.

[0073] In specific implementation, the circumferential vibration suppression structure assembly 3 has various implementation manners in the increasing change mode of the circumference, such as Figures 10-12 As shown in FIG. 4:

[0074] The first implementation is that the circumferences of the circumferential vibration suppression structure assemblies 3 increase by equal proportion gradient from inside to outside, such as an increasing amount of 30 mm, 120 mm, or 500 mm.

[0075] The second implementation is that the circumferences of the circumferential vibration suppression structure assemblies 3 increase by segmented proportion gradient from inside to outside, such as an increasing amount of 15 mm in the first segment, an increasing amount of 25 mm in the second segment, or an increasing amount of 40 mm in the first segment, an increasing amount of 35 mm in the second segment, and an increasing amount of 20 mm in the third segment.

[0076] The third embodiment is that the circumference of each circumferential vibration suppression structure assembly 3 increases in a cyclic proportional gradient from inside to outside, for example, the increment of each circumference in the first section is 10 mm, the increment of each circumference in the second section is 20 mm, the increment of each circumference in the third section is 30 mm, the increment of each circumference in the fourth section is 20 mm, and the increment of each circumference in the fifth section is 10 mm (i.e. 10→20→30→20→10), for another example, the increment of each circumference in the first section is 22 mm, the increment of each circumference in the second section is 18 mm, the increment of each circumference in the third section is 22 mm, the increment of each circumference in the fourth section is 18 mm, and the increment of each circumference in the fifth section is 22 mm (i.e. 22→18→22→18→22), the increment of each circumference in the first section is 13 mm, the increment of each circumference in the second section is 26 mm, the increment of each circumference in the third section is 20 mm, the increment of each circumference in the fourth section is 32 mm, and the increment of each circumference in the fifth section is 42 mm (i.e. 13→26→20→32→42), for another example, the increment of each circumference in the first section is 27 mm, the increment of each circumference in the second section is 23 mm, and the increment of each circumference in the third section is 19 mm (i.e. 27→19→23).

[0077] In the specific implementation process, the rigidity and layout form of the weak-rigidity elastic part 6 can be adjusted, the size and layout position of the high-rigidity mass part 7 can be changed, the rotation angle of the linear strip-shaped vibration suppression unit 5 can be adjusted, the circumference gradient of the circumferential vibration suppression structure assembly 3 can be modulated, and the lattice, configuration and coupling relationship of the central bearing seat 1, the radial bearing assembly 2 and the circumferential vibration suppression structure assembly 3 are designed in coordination, so that the resonance frequency of each linear strip-shaped vibration suppression unit 5 is staggered and extended, the distributed vibration suppression frequency band of the overall vibration isolation device 8 is widened, and the bearing capacity coupling is enhanced.

[0078] It should be noted that the connection between each component of the vibration isolation device 8 in the embodiment can be realized by welding, integral molding, bolt fixing, pin shaft fixing and the like.

[0079] It should be noted that the vibration isolation device 8 in the embodiment is not limited to the implementation structure shown in the drawings, and other implementation structures can also be used, for example: Figure 1

[0080] Reference Figure 13 For another embodiment of the vibration isolation device 8, each linear strip-shaped vibration suppression unit 5 includes two weak-rigidity elastic parts 6 and one high-rigidity mass part 7, and the two weak-rigidity elastic parts 6 are located between the high-rigidity mass part 7, wherein the end portions of each high-rigidity mass part 7 located between adjacent radial support structures 4 are located on the same straight line.

[0081] Reference Figure 14 ​For another embodiment of the vibration isolation device 8, in which each linear strip-shaped vibration isolation unit 5 includes two weak stiffness elastic parts 6 and one high stiffness mass part 7, and the two weak stiffness elastic parts 6 are located between the high stiffness mass part 7, wherein the overall concave arc structure of the linear strip-shaped vibration isolation unit 5, and each high stiffness mass part 7 located between adjacent radial support structures 4 is connected by a connecting rod, and the connecting rod sequentially passes through each high stiffness mass part 7.

[0082] Reference Figure 15 For another embodiment of the vibration isolation device 8, in which each linear strip-shaped vibration isolation unit 5 includes two weak stiffness elastic parts 6 and one high stiffness mass part 7, and the two weak stiffness elastic parts 6 are located between the high stiffness mass part 7, wherein the overall concave arc structure of the linear strip-shaped vibration isolation unit 5, and each high stiffness mass part 7 located between adjacent radial support structures 4 is connected by a connecting rod, and the connecting rod sequentially passes through each high stiffness mass part 7.

[0083] Example 2

[0084] The present embodiment discloses a high-load wide-frequency vibration isolation system based on a spider web-like metamaterial structure, which includes at least the vibration isolation device 8 in Example 1. Each vibration isolation device 8 can be arranged in series, in parallel, or in a combination of series and parallel.

[0085] If the two vibration isolation devices 8 are in series, the corresponding two vibration isolation devices 8 are connected by a longitudinal connecting part 10, that is, Figure 16 as shown;

[0086] If the two vibration isolation devices 8 are in parallel, the corresponding two vibration isolation devices 8 are connected by a transverse connecting part 9, or the corresponding two vibration isolation devices 8 are not connected, that is, Figure 17 as shown, wherein the transverse connecting part 9 is in an X configuration, one side of the transverse connecting part 9 is connected to the second end of the two radial support structures in one of the vibration isolation devices 8, and the other side of the transverse connecting part 9 is connected to the second end of the two radial support structures in the other vibration isolation device 8.

[0087] In the present embodiment, the central bearing pedestal 1 is made of aluminum alloy, stainless steel, PVC, plastic, glass, stone, or composite material; the radial support structure 4 is made of steel, iron, aluminum alloy, plastic, composite material, reinforced concrete, or wood; the weak stiffness elastic part 6 is made of spring steel, aluminum alloy, nylon, non-woven fabric, silicone, fiber, rubber, or resin; the high stiffness mass part 7 is made of copper, steel, iron, glass, stone, aluminum alloy, tungsten alloy, ceramic, or plastic; the longitudinal connecting part 10 and the transverse connecting part 9 are made of steel, iron, aluminum alloy, composite material, reinforced concrete, wood, or plastic.

[0088] Effect description

[0089] Reference Figure 18A schematic diagram of the damping effect of the vibration isolation device 8 in the application, Figure 15 The vibration transmissibility curve of the high-load-bearing broadband vibration isolation device 8 based on the spider web-like metamaterial structure is given, and the results show that the average vibration signal attenuation amplitude reaches 15.7 dB in the low-frequency broadband range of 200 Hz-5000 Hz, and a low-frequency broadband high-efficiency vibration suppression effect is achieved.

[0090] The working principle and advantages of the vibration isolation device 8 and system in the application are:

[0091] 1. High load capacity, small size:

[0092] On the one hand, based on the spider web configuration design, the unique geometric shape can be used to balance the pressure and tension of the entire device and system. That is, when the device and system are subjected to external loads, the force acting on the device and system will be dispersed along the spider web-like contour to the entire device surface, effectively balancing the pressure and tension in the device and system, preventing damage to the device and system due to local overload, and improving the load bearing performance of the device and system. On the other hand, the center bearing pedestal 1 serves as a support for carrying loads, and through the radial support structure 4, the local stiffness enhancement of the center bearing pedestal 1, and the cooperative enhancement of the connection interface, the load bearing range of the center bearing pedestal 1 can be effectively expanded, further improving the load bearing performance of the device and system. In addition, the microstructure unit simulates the spider web leg configuration, which helps to reduce the structure size and improve the space utilization.

[0093] 2. Low frequency, wide band:

[0094] On the one hand, by changing the thickness, length, number and arrangement of the weak stiffness elastic part 6, adjusting the size and relative position of the high stiffness mass part 7, and rotating the linear strip-shaped vibration suppression unit 5, the resonance frequency of the linear strip-shaped vibration suppression unit 5 can be designed to the target low frequency. When subjected to external load excitation, the vibration signal of the corresponding target frequency will excite the resonance mode of the linear strip-shaped vibration suppression unit 5, causing it to vibrate violently and dissipate the vibration energy in the form of heat energy, thereby suppressing the propagation of vibration energy to the center bearing pedestal 1, achieving the purpose of low-frequency vibration isolation. On the other hand, by arranging the circumferential vibration suppression structure assembly 3 of the spider web-like structure in a ring-like manner along the center pedestal from inside to outside, the circumference of each ring of the circumferential vibration suppression structure assembly 3 of the spider web-like structure is increased in gradient, and the rotation angle, number and other parameters of the linear strip-shaped vibration suppression unit 5 are adjusted, the resonance frequency of the microstructure unit can be designed to be distributed and widened, greatly widening the vibration isolation frequency band of the device and system.

[0095] 2. Easy to process, adjustable:

[0096] The designed spider web-like metamaterial structure high-performance vibration reduction and isolation device 8 has simple overall structure, is easy to process and is convenient for engineering application; meanwhile, the device has many adjustable parameters, can be quickly adjusted and improved according to actual control requirements; and can be combined with artificial intelligence technology to realize intelligent design and control.

[0097] The application can be used for vibration reduction and isolation control of modern high-end equipment, can effectively reduce overall vibration caused by operation of the modern high-end equipment, reduce failure rate and damage rate, and greatly improve stability, accuracy and reliability. The application realizes low-frequency ultra-wideband vibration reduction and isolation performance, considers high stiffness, high strength and other high bearing functions, has small device thickness size and compact structure, and has wide free and flexible design space (can be modularized).

[0098] The above only describes the preferred embodiments of the application, and does not limit the patent range of the application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the application and according to the content of the specification and drawings are included in the patent protection range of the application.

Claims

1. A high bearing broadband vibration isolation device based on a spider-web like metamaterial structure, characterized in that, The device comprises a central bearing pedestal, a radial bearing assembly and a circumferential vibration suppression structure assembly; The radial bearing assembly comprises a plurality of radial support structures, the first end of each radial support structure is connected to the central bearing pedestal, and the radial support structures are arranged in a ring shape around the central bearing pedestal at a certain angle; The circumferential vibration suppression structure assembly is arranged in a mesh shape along the central bearing pedestal, and the circumference of each circumferential vibration suppression structure assembly increases in a predetermined manner from inside to outside; Each circumferential vibration suppression structure assembly comprises a plurality of linear strip-shaped vibration suppression units, each linear strip-shaped vibration suppression unit comprises at least two weak stiffness elastic parts and at least one high stiffness mass part; The two ends of each linear strip-shaped vibration suppression unit are respectively connected to two adjacent radial support structures, and the connection points are located between the first end and the second end of the corresponding radial support structure.

2. The high load-carrying broadband vibration isolation device based on the spider-web mimicking metamaterial structure according to claim 1, characterized in that, In the same linear strip-shaped vibration suppression unit, the weak stiffness elastic part and the high stiffness mass part are connected in series; Each end of the linear strip-shaped vibration suppression unit is connected to the radial support structure through at least one weak stiffness elastic part.

3. The high load-carrying broadband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 2, wherein, The weak stiffness elastic part is a single elastic element; or The weak stiffness elastic part is composed of at least two elastic elements connected in parallel and / or in series.

4. The high load wideband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 1 or 2 or 3, wherein, The linear strip-shaped vibration suppression unit has a rotational degree of freedom on the radial support structure, so that by rotating the linear strip-shaped vibration suppression unit, the size of its main vibration plane and the resonance frequency can be changed.

5. The high load wideband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 1 or 2 or 3, wherein, The neutral axis of each radial support structure is located in the same plane or approximately in the same plane.

6. The high load wideband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 1 or 2 or 3, wherein, The central bearing pedestal is a solid cylinder, a hollow cylinder, a beam assembly, a rod assembly or a plate assembly; or The central bearing pedestal is a combination of beams, rods and plates.

7. The high load wideband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 1 or 2 or 3, wherein, The radial support structure is a rod structure; or The radial support structure is a beam structure with local stiffeners and / or local perforations; or The radial support structure is a composite structure.

8. The high load wideband vibration isolation device based on the spider-web mimicking metamaterial structure of claim 1 or 2 or 3, wherein, Each circumferential vibration suppression structure assembly has a spacing between adjacent circumferential vibration suppression structure assemblies; From inside to outside, the circumference of each circumferential vibration suppression structure assembly increases in equal proportion, in segmented proportion or in cyclic proportion.

9. A high bearing broadband vibration isolation system based on a spider-web inspired metamaterial structure, characterized in that, The device comprises at least two vibration isolation devices according to any one of claims 1 to 8, and each vibration isolation device is connected in series and / or in parallel; If the two vibration isolation devices are connected in series, the corresponding two vibration isolation devices are connected through a longitudinal connecting part; If the two vibration isolation devices are connected in parallel, the corresponding two vibration isolation devices are connected through a transverse connecting part, or the corresponding two vibration isolation devices are not connected.

10. The high load wideband vibration isolation system based on the spider-web inspired metamaterial structure of claim 9, wherein, The central bearing pedestal is made of aluminum alloy, stainless steel, plastic, glass, stone or composite material; The radial support structure is made of steel, iron, aluminum alloy, composite material, plastic or wood; The weak stiffness elastic part is made of spring steel, aluminum alloy, nylon, non-woven fabric, fiber, rubber, silicone or resin; The high stiffness mass part is made of copper, steel, iron, glass, stone, aluminum alloy, tungsten alloy, ceramic or plastic; The longitudinal connecting part and the transverse connecting part are made of steel, iron, aluminum alloy, composite material, wood or plastic.

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