Design method of extremely-small curved surface multi-focus array metamaterial low-frequency vibration isolation component and vibration isolator

Abstract

The invention belongs to the field of low-frequency vibration reduction, and particularly discloses an extremely-small-curved-surface multi-key array metamaterial low-frequency vibration isolation component design method and a vibration isolator, and the design method comprises the steps: determining a unit cell topology type and a nested multiple number of required extremely-small-curved-surface multi-key array metamaterials; based on the unit cell topology type, constructing a corresponding single minimal curved surface three-dimensional model; based on the nested multiple numbers, performing corresponding multiple-number copying on the single minimum curved surface three-dimensional model according to a preset interval in a preset direction so as to obtain a multiple minimum curved surface three-dimensional model; the preset distance is smaller than the side length of the corresponding unit cell structure; and removing a non-multi-nested structure at the edge of the multi-minimum curved surface three-dimensional model, and respectively constructing bottom plates on a pair of side surfaces to obtain a low-frequency vibration isolation component model. According to the vibration isolation component, rigidity superposition and improvement of the damping ratio are achieved, the contradiction between the rigidity and the vibration isolation performance is well adjusted, and the vibration isolation component has the lower vibration isolation frequency and the wider vibration isolation frequency band while meeting the bearing capacity.

Description

Technical Field

[0001] The present application belongs to the technical field of low-frequency vibration reduction, and more specifically, to a design method for a minimal surface multi-point array metamaterial low-frequency vibration isolation component and a vibration isolator. Background Art

[0002] The low-frequency vibration of mechanical noise is the main noise source in ship navigation or similar scenarios. Achieving low-frequency vibration isolation while taking into account both load-bearing performance and vibration isolation performance has always been a major challenge in the field of vibration reduction and noise reduction. The use of vibration isolators is an effective means to achieve vibration reduction and noise reduction. It can effectively weaken the transmission of vibration sources and isolated vibrations, thereby achieving good vibration reduction and noise reduction effects. However, limited by the principle of vibration reduction and noise reduction, the stiffness and vibration isolation performance of traditional vibration isolators show a contradictory inverted relationship. Improving low-frequency vibration isolation performance must be at the expense of load-bearing performance.

[0003] With the rapid development of metamaterials, the unit structure of materials is designed to obtain extraordinary physical properties that do not exist in nature, providing new ideas for vibration reduction and noise reduction. At the same time, thanks to the rapid development of additive manufacturing technology, it has become possible to prepare high-precision and high-complexity metamaterial isolators. However, the unit cell configuration of existing metamaterial isolators is relatively fixed, and the vibration isolation effect is good only within a specific frequency range, making it difficult to achieve broadband and low-frequency vibration isolation and meet the requirements of load bearing and vibration isolation at the same time. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of this application is to provide a design method for a minimal surface multi-point array metamaterial low-frequency vibration isolation component and a vibration isolator, aiming to solve the problem that the unit cell configuration of the existing metamaterial vibration isolator only has a vibration isolation effect within a specific frequency range, and it is difficult to achieve broadband and low-frequency vibration isolation and simultaneously meet the multiple requirements of load-bearing and vibration isolation.

[0005] To achieve the above objectives, the present application provides a method for designing a minimal surface multi-point array metamaterial low-frequency vibration isolation component, comprising: S1. Determine the unit cell topology type and nesting multiplicity of the required minimal surface multi-point array metamaterial, wherein the unit cell topology type includes a Gyroid minimal surface structure, an IWP minimal surface structure, and a Diamond minimal surface structure; S2 constructs a corresponding single minimal surface three-dimensional model based on the unit cell topology type; based on the nesting multiplicity, replicates the single minimal surface three-dimensional model along a preset direction at a preset spacing to obtain a multiple minimal surface three-dimensional model; wherein the preset spacing is less than the side length of the corresponding unit cell structure; S3 removes the structure that is not multi-nested at the edge of the multiple minimal surface three-dimensional model; S4 constructs a bottom plate of a preset thickness on a pair of side surfaces of the multiple minimal surface three-dimensional model with redundant structures removed to obtain the low-frequency vibration isolation component model.

[0006] Furthermore, in step S2, the side length of the single minimal surface three-dimensional model is equal to the side length of the multiple minimal surface three-dimensional model after removing redundant structures.

[0007] Furthermore, when the unit cell topology type is determined to be a Gyroid surface, the corresponding nesting multiplicity is two, four or eight; in step S2, a Gyroid single minimal surface model is first constructed, and then based on the corresponding nesting multiplicity, the Gyroid single minimal surface model is replicated along a preset direction and at a preset spacing with a corresponding multiplicity to obtain a Gyroid multiple minimal surface model.

[0008] Furthermore, in step S2, the Gyroid single minimal surface model is replicated multiple times along a preset direction at a preset spacing to obtain a multiple minimal surface three-dimensional model: The Gyroid single minimal surface model is The spacing is copied to obtain the Gyroid double minimal surface model, where a is the side length of the unit cell structure in the Gyroid single minimal surface model; The Gyroid double minimal surface model is Copy at the spacing to obtain the Gyroid quadruple minimal surface model; The Gyroid quadruple minimal surface model is respectively Copy it at to obtain the Gyroid eight-fold minimal surface model.

[0009] Furthermore, in step S1, when the unit cell topology type is determined to be an IWP surface, the corresponding nesting multiplicity is two or four; in step S2, an IWP single minimal surface model is constructed, and based on the corresponding nesting multiplicity, the IWP single minimal surface model is multiplexed along a preset direction at a preset spacing to obtain an IWP multiple minimal surface model.

[0010] Furthermore, based on the nesting multiplicity, the steps of multiple-copying the IWP single minimal surface model along a preset direction and at a preset spacing are as follows: The IWP single minimal surface model is placed along the X-axis direction. The spacing is copied, and then along the Y axis direction Copy at to obtain the IWP double minimal surface model; The IWP double minimal surface model is placed along the X-axis direction. The spacing is copied, and then along the Y axis direction The IWP quadruple minimal surface model is obtained by copying the spacing.

[0011] Furthermore, in step S1, when the unit cell topology type is determined to be a Diamond surface, the corresponding nesting multiplicity is two or four; in step S2, a Diamond single minimal surface model is constructed, and based on the corresponding nesting multiplicity, the Diamond single minimal surface model is multiplexed along a preset direction at a preset spacing to obtain a Diamond multiple minimal surface model.

[0012] Furthermore, based on the corresponding nesting multiplicity, the step of replicating the Diamond single minimal surface model along a preset direction at a preset spacing is as follows: The Diamond single minimal surface model is placed along the X-axis direction. The spacing is copied, and then along the Y axis direction Copy it at to obtain the Diamond dual minimal surface model; The Diamond dual minimal surface model is placed along the X-axis The spacing is copied, and then along the Y axis direction Copy the spacing to obtain the Diamond quadruple minimal surface model.

[0013] According to another aspect of the present application, a vibration isolator is also provided, which includes a connecting cover, a base and a vibration isolation component, and the model of the vibration isolation component is obtained by the design method as described in any of the preceding items. The vibration isolator includes: a connecting cover, a base and a vibration isolation component, and an open vibration isolation cavity is provided in the base, and the vibration isolation component is arranged in the vibration isolation cavity. The connecting cover cooperates with the base to connect and close the opening of the vibration isolation cavity to confine the vibration isolation component in the vibration isolation cavity.

[0014] Furthermore, an implant skeleton is provided at the bottom of the vibration isolation cavity, a square countersunk hole is provided on the bottom surface of the vibration isolation component, and the implant skeleton is embedded in the square countersunk hole; an adjustment gasket is provided between the vibration isolation component and the side wall of the vibration isolation cavity; a plurality of pairs of adjustment screws are passed through the side wall of the base, one end of the adjustment screw is located in the vibration isolation cavity and abuts against the adjustment gasket to limit the vibration isolation component.

[0015] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the prior art: (1) The design method provided in the present application constructs a variety of minimal surface unit cells, including a Gyroid minimal surface unit cell structure, an IWP minimal surface unit cell structure, and a Diamond minimal surface unit cell structure, and uses the three surface unit cell structures to nest and reconstruct the required three-dimensional model of the multiple minimal surface lattice structure material, and then uses different types of multiple minimal surface lattice material structures to design a solid model of the vibration isolation component. Compared with the vibration isolation components of existing vibration isolators, the Gyroid multiple minimal surface lattice structure, the IWP multiple minimal surface lattice structure, and the Diamond minimal surface lattice structure designed by the aforementioned design method have uniform surface transitions, no sharp inflection points, uniform stress distribution, and high fatigue life.

[0016] (2) In the design method provided in the present application, the required vibration isolation components can be customized according to the application scenarios, because the structural form and nesting multiplicity of the minimal surface lattice structure are controlled by the corresponding implicit function equations. By multiple decomposition and nesting of different minimal surface unit cell structures, minimal surface lattice structures with different structural forms and different multiplicity can be generated. Therefore, it has a large degree of design freedom. As long as the design parameters are changed according to the requirements during the design process, minimal surface multiple point lattice structures with different volume fractions and different unit cell sizes can be generated, which can be more adaptable to more actual vibration reduction scenarios.

[0017] (3) The design method provided in this application achieves stiffness superposition and improvement of damping ratio by multiple nesting of minimal surface single structures to form a minimal surface multi-point array structure, and well adjusts the contradiction between stiffness and vibration isolation performance, so that the vibration isolation components meet the load-bearing capacity while having a lower vibration isolation frequency and a wider vibration isolation frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process flow of the design method of the minimal surface multi-point array metamaterial low-frequency vibration isolation component provided by the present application; Figure 2 It is a schematic diagram of the design, processing and application process of the extremely small surface multi-point array metamaterial low-frequency vibration isolation component provided by this application; Figure 3 Schematic diagrams of the unit cell structures corresponding to the Gyroid surface, IWP surface and Diamond surface provided in this application; Figure 4 It is a schematic diagram of the evolution process of replication of the single-, double-, quadruple- and octuplet-level Gyroid minimal surface structures provided by this application; Figure 5 It is a schematic diagram of the evolution process of IWP single-layer, double-layer and quadruple-layer minimal surface structure replication provided by this application; Figure 6It is a schematic diagram of the replication evolution process of the Diamond single-, double- and quadruple-minimal surface structures provided by this application; Figure 7 It is a schematic diagram of the structure of a vibration isolator having a Gyroid quadruple minimal surface lattice material vibration isolation component provided by an embodiment of the present application; Figure 8 It is a schematic diagram of a cross-sectional structure of a vibration isolator provided by an embodiment of the present application without the Gyroid quadruple minimal surface lattice material vibration isolation component; Fig. 9 It is a schematic diagram of a cross-sectional structure of a vibration isolator having a Gyroid quadruple minimal surface lattice material vibration isolation component provided by an embodiment of the present application; Fig.10 It is a schematic diagram of the three-dimensional structure of a Gyroid quadruple minimal surface lattice material vibration isolation component from one perspective provided in an embodiment of the present application; Fig.11 It is a schematic diagram of the three-dimensional structure of the Gyroid quadruple minimal surface lattice material vibration isolation component provided in an embodiment of the present application from another perspective.

[0019] In all the drawings, the same figure numbers are used to represent the same elements or structures, among which: 1-connecting cover, 2-base, 21-vibration isolation chamber, 3-lower rubber vibration-damping friction pad, 4-upper rubber vibration-damping friction pad, 5-sealing ring, 6-fastening bolt, 7-implant frame, 8-fixing bolt, 9-adjusting screw, 10-bolt, 11-vibration isolation component, 12-adjusting gasket, 13-screwing handle, 14-circular countersunk hole, 15-square countersunk hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The term "and / or" in this article is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol " / " in this article indicates that the associated objects are in an or relationship, for example, A / B means A or B.

[0022] The terms "first" and "second" in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of the objects. For example, a first response message and a second response message are used to distinguish different response messages rather than to describe a specific order of the response messages.

[0023] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0024] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc.; multiple elements refer to two or more elements, etc.

[0025] The present application provides a method for designing a low-frequency vibration isolation component of a metamaterial with a minimal curved surface and multiple point arrays. Figure 1 and Figure 2 As shown, the design method includes the following steps: S1 determines the unit cell topology type and nesting multiplicity of the required minimal surface multi-point array metamaterial. The unit cell topology types include Gyroid minimal surface structure, IWP minimal surface structure and Diamond minimal surface structure; S2 constructs a corresponding single minimal surface three-dimensional model based on the unit cell topology type; based on the nested multiplicity, the single minimal surface three-dimensional model is replicated along a preset direction at a preset spacing with a corresponding multiplicity to obtain a multiple minimal surface three-dimensional model; wherein the preset spacing is less than the side length of the corresponding unit cell structure; S3 removes structures that are not multi-nested at the edges of three-dimensional models with multiple minimal surfaces; S4 constructs a bottom plate of a preset thickness on a pair of side surfaces of the multiple minimal surface three-dimensional model with redundant structures removed to obtain a low-frequency vibration isolation component model.

[0026] In step S1, a demand analysis is first performed according to specific working conditions to determine the required vibration isolation effect, frequency range, load capacity, etc. of the vibration isolator. The required vibration isolation components and other parts that cooperate with the vibration isolation components are designed and a three-dimensional model is generated so that the solid model can meet the vibration isolation effect and load capacity required by the vibration isolator under the working conditions.

[0027] Specifically, according to the different application conditions of the vibration isolator, the structural characteristics and related mechanical vibration performance required by the vibration isolator are analyzed. Then the Gibson-Ashby model is established, and the correlation between Young's modulus and volume fraction is obtained:

[0028] in, , ρ is the density measured for the actual lattice structure, ρ sis the density of the matrix material, , is the elastic modulus of the porous structure, is the elastic modulus of the matrix material, are the scale factors, is the lattice relative density (volume fraction), b is the number of lattice pillars, j is the number of lattice nodes. When the lattice is dominated by bending, the proportional factor for the elastic modulus of the porous structure is ;when When the lattice is dominated by stretching, the proportionality factor for the elastic modulus is .

[0029] Then, based on the structural performance of the vibration isolator, the unit cell topology type and multiple nesting mode of the minimal surface multi-point array metamaterial required for the vibration isolation component in the vibration isolator are determined. For example, the unit cell type, unit cell size, unit cell volume fraction, etc. of the minimal surface multi-point array metamaterial are determined according to the vibration isolation effect and load-bearing capacity, and the nesting multiplicity of the lattice structure is determined.

[0030] Specifically, in step S1, when the unit cell topology type is determined to be a Gyroid surface, the corresponding nesting multiplicity can be selected as double, quadruple and octave; when the unit cell topology type is determined to be an IWP surface, the corresponding nesting multiplicity can be selected as double and quadruple; when the unit cell topology type is determined to be a Diamond surface, the corresponding nesting multiplicity can be selected as double and quadruple.

[0031] In step S2, according to the different topological types of the minimal surface unit cell, the corresponding implicit function equation (the following control equation) is used to first form an array structure based on the corresponding unit cell structure model. The array structure is a single minimal surface three-dimensional model, which can meet the structural characteristics and related force vibration performance required by the vibration isolation component.

[0032] The control equations of the three single minimal surface three-dimensional models provided in this application are: The governing equation of Gyroid is:

[0033] The governing equation of the IWP is: The governing equation for Diamond is: Among them, Figure 3 As shown, a, b, c are the side lengths of the unit cell structures that constitute the three-dimensional models of different single minimal surfaces, t is the unit cell volume fraction control parameter, x Indicates the corresponding coordinate system xAxis coordinates, y Indicates the corresponding coordinate system y Axis coordinates, z Indicates the corresponding coordinate system z The deformation mechanism of the rod in each unit cell determines its stiffness and damping performance. The deformation mechanism of the rod in Gyroid, Diamond, and IWP is dominated by bending.

[0034] Then, according to the different nesting multiplies, the modeling software is used to decompose and nest the single minimal surface three-dimensional model constructed above.

[0035] Specifically, in step S2, when the unit cell topology type is determined to be a Gyroid surface, multiple edges with lengths of a First, we construct a Gyroid single minimal surface model based on the Gyroid unit cell. The Gyroid single minimal surface model is an array structure composed of multiple corresponding unit cells. Figure 3 As shown, based on the corresponding nesting multiplicity, the Gyroid single minimal surface model is replicated multiple times along a preset direction at a preset spacing to obtain a Gyroid multiple minimal surface model.

[0036] The Gyroid single minimal surface model is replicated multiple times along the preset direction and at the preset spacing to obtain Figure 4 The steps of the three-dimensional model of multiple multi-minimal surfaces shown are: (1) Figure 4 The Gyroid minimal surface model shown in the figure is in the X-axis direction. Copy at the spacing to obtain the Gyroid double minimal surface model; (2) In order to obtain Figure 4 The Gyroid quadruple minimal surface model shown in the figure is used to repeat step (1) to obtain the Gyroid double minimal surface model; then the Gyroid double minimal surface model is Copy at the spacing to obtain the Gyroid quadruple minimal surface model; (3) In order to obtain Figure 4 The Gyroid eightfold minimal surface model shown in the figure is repeated in step (2) to obtain the Gyroid fourfold minimal surface model; then the Gyroid fourfold minimal surface model is respectively centered in the X-axis direction, the Y-axis direction, and the Z-axis direction. Copy it at the same place, and similarly we can get the Gyroid eightfold minimal surface model.

[0037] In step S2, when the unit cell topology type is determined as an IWP surface, multiple side lengths are used. bThe IWP single minimal surface model is constructed by the IWP unit cell, and the IWP single minimal surface model is also an array structure composed of the corresponding unit cells. Based on the corresponding nesting multiplicity, the IWP single minimal surface model is repeatedly replicated along the preset direction and at the preset spacing to obtain the IWP multiple minimal surface model.

[0038] like Figure 5 As shown, based on the corresponding nesting multiplicity, the steps of multiple replication of the IWP single minimal surface model along the preset direction and at the preset spacing are: (1) The IWP minimal surface model is placed along the X-axis. The spacing is copied, and then along the Y axis direction Copy at to obtain the IWP double minimal surface model; (2) In order to obtain the IWP quadruple minimal surface model, first repeat step (1) to obtain the IWP double minimal surface model, and then The spacing is copied, and then along the Y axis direction The IWP quadruple minimal surface model is obtained by copying the spacing.

[0039] In step S2, when the unit cell topology type is determined to be a Diamond surface, a Diamond single minimal surface model is first constructed using multiple Diamond unit cell structures with a side length of c. The Diamond single minimal surface model is an array structure composed of multiple Diamond unit cell structures. Based on the corresponding nesting multiplicity, the Diamond single minimal surface model is replicated multiple times along a preset direction at a preset spacing to obtain a Diamond multi-minimal surface model.

[0040] Specifically, Figure 6 As shown in the figure, based on the corresponding nesting multiplicity, the steps of multiple replication of the Diamond single-layer minimal surface model along the preset direction and at the preset spacing are as follows: (1) Draw the Diamond minimal surface model along the X-axis. The spacing is copied, and then along the Y axis direction Copy it at to obtain the Diamond dual minimal surface model; (2) To obtain the Diamond quadruple minimal surface model, repeat step (1) to obtain the Diamond double minimal surface model; then, the Diamond double minimal surface model is re-constructed along the X-axis. The spacing is copied, and then along the Y axis direction Copy the spacing to obtain the Diamond quadruple minimal surface model.

[0041] In summary, the generation principle of the aforementioned minimal surface multiple point array metamaterial 3D models is: first construct a single minimal surface 3D model using the unit cell structure of the corresponding surface, and then perform multiple decomposition and multiple nesting of the single minimal surface 3D model, that is, convert a single point array with a large volume fraction into multiple point arrays with small volume fractions and nest them with each other, so as to obtain minimal surface point array metamaterial 3D models with different nesting multiplies. For example: each time a copy is made along a preset direction at a preset spacing, the volume fraction of the single minimal surface 3D model will be reduced by half, so that the volume fraction of the multiple minimal surface 3D model after copying can be kept at the original design value.

[0042] In step S3, the unnested edges of the obtained various multiple minimal surface lattice metamaterial three-dimensional models are removed. The side length of the multiple minimal surface lattice metamaterial three-dimensional model after removing the redundant single structure at the edge is equal to the side length of the initial single minimal surface three-dimensional model in step S3.

[0043] In step S4, a connecting plate body with a required thickness of the vibration isolation component is designed on a pair of side surfaces of the three-dimensional model of the multiple minimal surface lattice metamaterial after removing the edge portion, thereby obtaining the required three-dimensional model of the multiple minimal surface vibration isolation component. The three-dimensional model of the vibration isolation component is then exported as an STL file, sliced ​​and imported into a laser powder bed melting device for processing and preparation.

[0044] The specific additive preparation method is: select nickel-titanium alloy materials, such as: , , , , , , , , Any one of the above can be used as the additive preparation material.

[0045] Select appropriate working parameters and perform LPBF forming (laser powder bed fusion technology) under the protection of inert gas; the working parameters can be selected as: laser power of 125w, scanning speed of 600mm / s, layer thickness of 30um, scanning interval of 100um, and spot diameter of 50; form under the protection of inert gas argon to prepare multiple minimal surface lattice metamaterial vibration isolation components.

[0046] After forming, the multiple minimal surface lattice metamaterial vibration isolation components are post-processed: in-situ annealing is carried out under the protection of inert gas to remove the internal thermal stress of the sample; the sample is separated from the substrate using a wire cutting process and sandblasted to finally obtain a metamaterial vibration isolation component with a smooth surface and excellent performance.

[0047] According to the three-dimensional models of other components of the initial design, corresponding components are prepared to support and fix the vibration isolation components, and combined to form the required vibration isolator.

[0048] In another embodiment, a vibration isolator is provided. The vibration isolator is a low-frequency vibration isolator and has a minimal surface multi-point array metamaterial low-frequency vibration isolation component designed by the design method of any of the above embodiments, such as Figures 7 to 9 As shown, the vibration isolator comprises: a connection cover 1, a base 2 and a vibration isolation component 11. The base 2 is provided with an open vibration isolation cavity 21. The vibration isolation component 11 is arranged in the vibration isolation cavity 21. The connection cover 1 is connected with the base 2 to limit the vibration isolation component 11 in the vibration isolation cavity 21. Specifically, a bolt hole is opened in the middle of the connection cover 1, such as Fig.10 As shown, a circular countersunk hole 14 corresponding to the bolt hole is provided on the upper bottom plate of the vibration isolation component 11, and the fastening bolt 6 is inserted into the bolt hole and the corresponding circular countersunk hole 14 to fix the connection cover 1 and the vibration isolation component 11, and at the same time, the edge matching connection of the connection cover 1 and the base 2 is connected and fixed by the fixing bolt 8. A plurality of bolt holes 10 are provided on the lower periphery of the base 2 for connecting with external application equipment.

[0049] The bottom of the vibration isolation cavity 21 is provided with an implant frame 7, such as Fig.11 As shown, four square countersunk holes 15 are provided on the bottom edge of the vibration isolation component 11, and the implant skeleton 7 can be embedded in these square countersunk holes 15, so that the vibration isolation component 11 is fixedly connected to the vibration isolation cavity 21; an adjustment gasket 12 is provided between the vibration isolation component 11 and the side wall of the vibration isolation cavity 21, and a plurality of adjustment screws 9 are symmetrically penetrated on the side wall of the base 2, one end of the adjustment screw 9 is located in the vibration isolation cavity 21 and abuts against the adjustment gasket 12 to limit the vibration isolation component 11, and the adjustment gasket 12 can protect the vibration isolation component 11 from being damaged by the adjustment screw 9 of the handle. In addition, a sealing ring 5 is installed in the circumference of the connection position between the connecting cover 1 and the base 2 for sealing. A lower rubber vibration-damping friction pad 3 is also sleeved on the outer side of the end of the base 2 away from the connecting cover 1, and an upper rubber vibration-damping friction pad 4 is sleeved on the outer surface of the end of the connecting cover 1 away from the base 2.

[0050] More specifically, both the upper and lower ends of the vibration isolation component 11 have a rectangular bottom plate with a thickness of 13 mm to 15 mm. A circular countersunk hole 14 for fastening is provided on the upper bottom plate. Four anti-shear square countersunk holes 15 are provided on the lower bottom plate, with a depth of 13 mm to 15 mm, a length of 6 mm to 9 mm, and a width of 6 mm to 9 mm, and each square countersunk hole can be embedded with an implant skeleton 7.

[0051] The aforementioned lower rubber vibration damping friction pad 3 is made of thickened nail-shaped neoprene, which is non-slip and durable, highly safe, reduces noise transmission, and has a long service life. It also adopts a circular concave-convex design to increase friction and ensure that the base is more non-slip and stable. The aforementioned upper rubber vibration damping friction pad 4 is made of NBR butyl rubber, which has low gas permeability and good oil resistance. It is impermeable to most general gases and is suitable for load-bearing environments with high sealing requirements.

[0052] The aforementioned sealing ring 5 is made of HNBR hydrogenated nitrile rubber with corrosion resistance and compression deformation resistance, and its Shore hardness ranges from 70 to 95. The sealing ring type adopts an O-type rubber sealing ring heavy-duty stepped combination, which is placed on the outer circumference of the connection cover 1 and the base 2 to prevent the intrusion of dust, hard inclusions and corrosive media. The bolt countersunk holes used to connect the vibration isolation component 11 and the connection cover 1 in the vibration isolator are all sealed with rubber sleeves.

[0053] The adjusting screw 9 is provided with a screw handle 13 at one end away from the outer side of the vibration isolation component 11. The screw handle 13 can be rotated to fix the adjusting screw 9 along the circumference of the vibration isolation component 11, wherein the compression limit distance of the fixing nut on the adjusting screw 9 in the load-bearing direction of each circular hole is 0mm to 3mm.

[0054] The aforementioned adjustment gasket 12 adopts an elastic NR natural rubber sealing ring material with low compression modulus and large compression deformation. It is not easy to swell in the medium and has a small thermal shrinkage effect. It is used for buffering and connection during the installation and fixation of the vibration isolation component 11, while filling the gap between the connection surfaces, increasing the force-bearing surface of the vibration isolation component 11, effectively alleviating interface stress concentration, increasing the strength and fatigue resistance of the connection surface, and preventing the connection interface from peeling off during use.

[0055] Next, in combination with actual application scenarios, the technical solution provided by this application is introduced in detail through several embodiments.

[0056] Example 1 (1) Install the vibration damper between the ship shaft system and the hull as needed to improve the vibration transmission relationship between the shaft system and the hull. The required vibration reduction frequency band is f = 10 ~ 50 Hz, the vibration isolation effect is 20dB ~ 30dB, the working load is 8t, the rated working load is 10t, the maximum working load is 12t, and the vertical stiffness is 900MPa. Therefore, according to experimental experience and historical data, the Gyroid double point array structure is matched and the Material.

[0057] The Young's modulus of the double Gyroid structure with a volume fraction of 20% is 47 GPa. The experimental measurement shows that the Young's modulus of the double Gyroid structure with a volume fraction of 20% is 512.25 MPa. The Gibson-Ashby model is:

[0058] According to the actual required Gyroid double point array structure, combined with formula (1) and (5), the Gyroid double point array structure with a volume fraction of 25%, a Young's modulus of 958.46 MPa, and a unit cell size of 8 mm can be matched, and the The material is then processed for subsequent additive manufacturing.

[0059] (2) Based on the implicit function equation of the Gyroid lattice structure mentioned above, a three-dimensional model of a single minimal surface is established to ensure that it meets the structural characteristics and related force-vibration performance required by the vibration isolation component.

[0060] (3) Based on the nesting multiplicity of two, modeling software is used to perform decomposition and nesting, and a two-fold minimal surface three-dimensional model is established to meet the required structural characteristics and related force-vibration performance.

[0061] (4) The three-dimensional models of the double minimal surface lattice structure and other components are exported as STL files and sliced ​​and imported into the laser powder bed melting equipment.

[0062] (5) Select appropriate working parameters, perform LPBF forming under the protection of inert gas, and prepare multiple minimal surface lattice metamaterial vibration isolation components. Set the laser power to 125w, the scanning speed to 600mm / s, the layer thickness to 30um, the scanning interval to 100um, and the spot diameter to 50 ; Forming is carried out under the protection of inert gas argon.

[0063] (6) After forming, the vibration isolation component is post-processed. In-situ annealing is performed under the protection of inert gas to remove the internal thermal stress of the sample; the sample is separated from the substrate using a wire cutting process and sandblasted to obtain a metamaterial vibration isolation component with a smooth surface and excellent performance.

[0064] (7) Assemble the vibration isolation component with other components of the vibration isolator to obtain a vibration isolator having a Gyroid double minimal surface lattice structure metamaterial vibration isolation component.

[0065] Example 2 (1) Installing vibration isolators on large transport vehicles can alleviate the vibration impact of heavy loads on the vehicle transport platform when the vehicle is transporting large goods. The vibration reduction frequency band is required to be f=10~100Hz, the vibration isolation effect is 35~45dB, the working load is 15t, the rated working load is 18t, the maximum working load is 20t, and the vertical stiffness is 200MPa. Therefore, according to experimental experience and historical data, the Gyroid octet array structure is matched and the Material.

[0066] The Young's modulus of is 47GPa. The experimental measurement shows that the Young's modulus of the Gyroid octet array structure with a volume fraction of 20% is 152.55MPa, and the Gibson-Ashby model can be obtained:

[0067] According to the actual required Gyroid octet point array structure, combined with formula (1) and formula (6), the Gyroid octet point array structure with a volume fraction of 22%, a Young's modulus of 214.18 MPa, and a unit cell size of 8 mm can be matched, and the selection The material is then processed for subsequent additive manufacturing.

[0068] (2) Based on the implicit function equation of the Gyroid lattice structure, a three-dimensional model of a single minimal surface with a side length of 8 mm was established to ensure that it meets the required structural characteristics and related force-vibration performance.

[0069] (3) Based on the nesting multiplicity of eight, modeling software is used to perform decomposition and nesting, and an eight-fold minimal surface three-dimensional model is established to satisfy the required structural characteristics and related force-vibration performance.

[0070] (4) The three-dimensional models of the eight-fold minimal surface lattice structure and other components are exported as STL files and sliced ​​and imported into the laser powder bed melting equipment.

[0071] (5) Select appropriate working parameters, perform LPBF forming under the protection of inert gas, and prepare multiple minimal surface lattice metamaterial vibration isolation components. Set the laser power to 125w, the scanning speed to 600mm / s, the layer thickness to 30um, the scanning interval to 100um, and the spot diameter to 50 ; Forming is carried out under the protection of inert gas argon.

[0072] (6) After forming, the metamaterial vibration isolation component is post-processed. In-situ annealing is performed under the protection of inert gas to remove the internal thermal stress of the sample; the sample is separated from the substrate using a wire cutting process and sandblasted to obtain a metamaterial vibration isolation component with a smooth surface and excellent performance.

[0073] (7) Assemble the vibration isolation component with other components of the vibration isolator to obtain a vibration isolator having a Gyroid eight-fold minimal surface lattice structure metamaterial vibration isolation unit.

[0074] Example 3 (1) Install the vibration damper on the aircraft engine group (single unit weight is more than 4 tons), and the engine support base plate has its own channel steel bracket. The vibration reduction frequency band is required to be f=100~200Hz, the vibration isolation effect is 30~40dB, the working load is 4t, the rated working load is 4.5t, the maximum working load is 6t, and the vertical stiffness is 400MPa. Therefore, according to experimental experience and historical data, the IWP quadruple array structure is matched and selected Material.

[0075] The Young's modulus of the IWP quadruple point array structure with a volume fraction of 20% is 47GPa. The Young's modulus of the IWP quadruple point array structure with a volume fraction of 20% is 259.13MPa, and the Gibson-Ashby model can be obtained:

[0076] According to the actual required IWP quadruple point array structure, the IWP quadruple point array structure with a volume fraction of 24%, a Young's modulus of 467.06 MPa, and a unit cell size of 8 mm can be matched by combining formula (1) and formula (7). The material is then processed for subsequent additive manufacturing.

[0077] (2) According to the implicit function equation of the IWP porous structure, a three-dimensional model of a single minimal surface is established to meet the required structural characteristics and related mechanical vibration performance.

[0078] (3) Based on the nesting multiplicity of four, modeling software is used to perform decomposition and nesting, and a three-dimensional model of four-fold minimal surfaces is established to satisfy the required structural characteristics and related force-vibration performance.

[0079] (4) The three-dimensional models of the IWP quadruple minimal surface lattice structure and other components are exported as STL files and sliced ​​and imported into the laser powder bed melting equipment.

[0080] (5) Select appropriate working parameters, perform LPBF forming under the protection of inert gas, and prepare multiple minimal surface lattice metamaterial vibration isolation components. Set the laser power to 125w, the scanning speed to 600mm / s, the layer thickness to 30um, the scanning interval to 100um, and the spot diameter to 50 ; Forming is carried out under the protection of inert gas argon.

[0081] (6) After forming, the metamaterial vibration isolation component is post-processed. In-situ annealing is performed under the protection of inert gas to remove the internal thermal stress of the sample; the sample is separated from the substrate using a wire cutting process and sandblasted to obtain a metamaterial vibration isolation component with a smooth surface and excellent performance.

[0082] (7) Assemble the vibration isolation component with other components of the vibration isolator to obtain a vibration isolator having an IWP quadruple minimal surface lattice structure metamaterial vibration isolation component.

[0083] It can be understood that the detailed functional implementation of each of the above-mentioned units / modules can be found in the introduction of the aforementioned method embodiment, and will not be repeated here.

[0084] It should be understood that the above-mentioned device is used to execute the method in the above-mentioned embodiment. The implementation principle and technical effect of the corresponding program module in the device are similar to those described in the above-mentioned method. The working process of the device can refer to the corresponding process in the above-mentioned method, which will not be repeated here.

[0085] Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method in the above embodiment.

[0086] Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method in the above embodiment.

[0087] It is understandable that the processor in the embodiment of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0088] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

[0089] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0090] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0091] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A design method for a minimal surface multi-point array metamaterial low-frequency vibration isolation component, characterized in that: include: S1. Determine the unit cell topology type and nesting multiplicity of the required minimal surface multi-point array metamaterial, wherein the unit cell topology type includes a Gyroid minimal surface structure, an IWP minimal surface structure, and a Diamond minimal surface structure; S2 constructs a corresponding single minimal surface three-dimensional model based on the unit cell topology type and the corresponding unit cell structure; based on the nesting multiplicity, replicates the single minimal surface three-dimensional model along a preset direction and at a preset spacing to obtain a multiple minimal surface three-dimensional model; wherein the preset spacing is less than the side length of the corresponding unit cell structure; S3 removes the structure that is not multi-nested at the edge of the multiple minimal surface three-dimensional model; S4 constructs a bottom plate of a preset thickness on a pair of side surfaces of the multiple minimal surface three-dimensional model with redundant structures removed to obtain the low-frequency vibration isolation component model.

2. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 1, characterized in that: The side length of the single minimal surface three-dimensional model is equal to the side length of the multiple minimal surface three-dimensional model after removing redundant structures.

3. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 1, characterized in that: In step S1, when the unit cell topology type is determined to be a Gyroid surface, the corresponding nesting multiplicity is two, four or eight; in step S2, a Gyroid single minimal surface model is first constructed, and then based on the corresponding nesting multiplicity, the Gyroid single minimal surface model is replicated along a preset direction and at a preset spacing with a corresponding multiplicity to obtain a Gyroid multiple minimal surface model.

4. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 3, characterized in that: In step S2, the Gyroid single minimal surface model is replicated multiple times along a preset direction at a preset spacing to obtain a multiple minimal surface three-dimensional model. The Gyroid single minimal surface model is The spacing is copied to obtain the Gyroid double minimal surface model, where a is the side length of the unit cell structure in the Gyroid single minimal surface model; The Gyroid double minimal surface model is Copy at the spacing to obtain the Gyroid quadruple minimal surface model; The Gyroid quadruple minimal surface model is respectively Copy it at to obtain the Gyroid eight-fold minimal surface model.

5. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 1, characterized in that: In step S1, when the unit cell topology type is determined to be an IWP surface, the corresponding nesting multiplicity is two or four; in step S2, an IWP single minimal surface model is constructed, and based on the corresponding nesting multiplicity, the IWP single minimal surface model is multiplexed along a preset direction at a preset spacing to obtain an IWP multiple minimal surface model.

6. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 5, characterized in that: Based on the corresponding nesting multiplicity, the steps of multiple-copying the IWP single minimal surface model along a preset direction and at a preset spacing are as follows: The IWP single minimal surface model is placed along the X-axis direction. The spacing is copied, and then along the Y axis direction Replicate at the same place to obtain the IWP double minimal surface model, where b is the side length of the unit cell structure in the IWP single minimal surface model; The IWP double minimal surface model is placed along the X-axis direction. Copy it at the spacing, and then copy it along the Y axis. The IWP quadruple minimal surface model is obtained by copying the spacing.

7. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 1, characterized in that: In step S1, when the unit cell topology type is determined to be a Diamond surface, the corresponding nesting multiplicity is two or four; in step S2, a Diamond single minimal surface model is constructed, and based on the corresponding nesting multiplicity, the Diamond single minimal surface model is multiplexed along a preset direction at a preset spacing to obtain a Diamond multiple minimal surface model.

8. The method for designing a low-frequency vibration isolation component of a minimal surface multi-point array metamaterial as claimed in claim 7, characterized in that: Based on the corresponding nesting multiplicity, the steps of multiple-copying the Diamond single-layer minimal surface model along a preset direction and at a preset spacing are as follows: The Diamond single minimal surface model is placed along the X-axis direction. The spacing is copied, and then along the Y axis direction Copy it at to obtain the Diamond dual minimal surface model, where c is the side length of the unit cell structure in the Diamond single minimal surface model; The Diamond dual minimal surface model is placed along the X-axis Copy it at the spacing, and then copy it along the Y axis. Copy the spacing to obtain the Diamond quadruple minimal surface model.

9. A vibration isolator, characterized in that: The vibration isolator comprises a connecting cover (1), a base (2) and a vibration isolation component (11); the model of the vibration isolation component (11) is obtained by the design method according to any one of claims 1 to 8; an open vibration isolation cavity (21) is provided in the base (2); the vibration isolation component (11) is arranged in the vibration isolation cavity (21); the connecting cover (1) and the base (2) are cooperatively connected to close the opening of the vibration isolation cavity (21) so as to confine the vibration isolation component (11) in the vibration isolation cavity (21).

10. The vibration isolator according to claim 9, characterized in that An implanted frame (7) is provided at the bottom of the vibration isolation cavity (21); a square countersunk hole (15) is provided on the bottom surface of the vibration isolation component (11); the implanted frame (7) is embedded in the square countersunk hole (15); an adjustment gasket (12) is provided between the vibration isolation component (11) and the side wall of the vibration isolation cavity (21); and a plurality of pairs of adjustment screws (9) are passed through the side wall of the base (2); one end of the adjustment screw (9) is located in the vibration isolation cavity (21) and abuts against the adjustment gasket (12) to limit the position of the vibration isolation component (11).

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