Three-dimensional corrugated honeycomb sound and vibration isolator and design method thereof

Abstract

The present application relates to the technical field of vibration and sound isolation, and provides a three-way corrugated honeycomb sound and vibration isolator and a design method thereof.The sound and vibration isolator comprises a plurality of negative Poisson's ratio cells, the plurality of negative Poisson's ratio cells are periodically arranged in a transverse direction and a longitudinal direction in the same plane, and are formed into a three-dimensional honeycomb structure; in a vertical direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell presents a periodic corrugated structure.Through the corrugated structure, the out-of-plane stiffness can be effectively reduced, so that the sound and vibration isolator can not only absorb part of the vibration energy in three directions, but also realize three-way low-frequency range vibration isolation, effectively improve the vibration isolation performance of the device, and when the vibration energy is transmitted through the device, the structure is deformed vertically, part of the energy is converted into internal strain energy, the elastic wave passes through the corrugated structure to produce impedance mismatch, and wave conversion also occurs, which is converted into a longitudinal wave that is not easy to propagate, and the energy absorption effect is further enhanced.

Description

Technical Field

[0001] This invention relates to the technical field of vibration isolation and sound insulation, and in particular to a three-dimensional corrugated honeycomb sound and vibration isolator and its design method. Background Technology

[0002] With the rapid development of naval technology, the requirements for vibration and noise control in ships are becoming increasingly stringent. The safety of electronic cabinet equipment on ships is directly related to the overall safety performance of the ship. During normal navigation, the structural vibration and noise levels are relatively high, posing a potential threat to electronic cabinets. As ships and their electronic equipment tend to become larger, the natural frequencies of the hull structure and the excitation frequencies of the cabinets are correspondingly lower. This makes it easier for vibrations generated by the electronic cabinets to induce resonance in the hull structure, leading to more significant vibration and noise problems. Therefore, optimizing the design to reduce these negative impacts is particularly important for maintaining the safety and performance of ships and electronic equipment.

[0003] The current design methods for vibration and sound isolation of ship propulsion systems mainly adopt vibration isolation technology. The traditional hexagonal honeycomb structure and the traditional negative Poisson's ratio structure are commonly used. The electronic cabinet is installed on the ground base with four vibration isolators, which can reduce the vibration and noise of the ship cabinet to a certain extent.

[0004] However, traditional negative Poisson's ratio and traditional hexagonal honeycomb vibration isolation structures can only achieve coplanar vibration isolation, but have no vibration isolation effect in the opposite direction. Therefore, traditional hexagonal honeycomb structures and traditional negative Poisson's ratio structures can hardly meet the increasingly high vibration isolation and sound insulation performance indicators of ships. Summary of the Invention

[0005] This invention provides a three-dimensional corrugated honeycomb sound and vibration isolator and its design method, which solves the problem that traditional hexagonal honeycomb structures and negative Poisson's ratio structures in the prior art cannot meet the vibration isolation and sound insulation performance indicators. It can effectively reduce the non-planar stiffness, so that it can not only absorb part of the vibration energy in three directions, but also achieve vibration isolation in the low frequency range in three directions, thus effectively improving the vibration isolation performance.

[0006] This invention provides a three-dimensional corrugated honeycomb sound insulation and vibration isolator, comprising:

[0007] Multiple negative Poisson ratio cells are arranged periodically in the same plane along the horizontal and vertical directions to form a three-dimensional honeycomb structure.

[0008] In the direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell exhibits a periodic wavy structure.

[0009] According to the present invention, the cell wall of the negative Poisson's ratio cell includes: a pair of transverse cell walls that extend laterally and are arranged alternately in the longitudinal direction, and a pair of longitudinal cell walls that extend longitudinally and are arranged alternately in the transverse direction.

[0010] The transverse cell wall and the longitudinal cell wall are connected in sequence to form a closed structure, and the longitudinal cell wall is bent toward the inside of the negative Poisson's ratio cell.

[0011] According to the present invention, a three-dimensional corrugated honeycomb sound insulation and vibration isolator is provided, wherein the longitudinal cell wall includes a pair of inclined plates, one end of the pair of inclined plates facing away from each other is connected to a pair of transverse cell walls respectively, and the corresponding ends are inclined toward the inside of the negative Poisson's ratio cell and connected thereto.

[0012] According to the present invention, a three-dimensional corrugated honeycomb sound insulation and vibration isolator is provided, wherein the three-dimensional honeycomb structure is integrally formed from aluminum alloy material.

[0013] According to the present invention, a three-dimensional corrugated honeycomb sound insulation and vibration isolator is provided, wherein the transverse cell wall and / or the longitudinal cell wall are provided with pores.

[0014] According to the present invention, a three-dimensional corrugated honeycomb sound insulation and vibration isolator is provided, wherein the holes are disposed on the transverse cell wall and / or the longitudinal cell wall.

[0015] According to the present invention, a three-dimensional corrugated honeycomb sound insulation and vibration isolator is provided, wherein the holes are uniformly distributed.

[0016] The design method of a three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by the present invention includes the following steps:

[0017] Construct a prediction model for the natural frequency of vibration isolators;

[0018] Based on the natural frequency prediction model of the vibration isolator and the weight and target frequency of the object to be isolated, the predicted structural parameters of the vibration isolator are obtained.

[0019] Based on the predicted structural parameters, a simulation verification is performed. When the simulation results meet the requirements, the final structural parameters of the vibration isolator are obtained.

[0020] According to the design method of a three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by the present invention, the construction of the natural frequency prediction model of the vibration isolator includes:

[0021] Identify several factors affecting the natural frequency of the vibration isolator;

[0022] The effects of different combinations of the aforementioned influencing factors on the natural frequency of the vibration isolator were systematically evaluated through orthogonal experiments.

[0023] Based on the results of orthogonal experiments, the optimal horizontal combination scheme was determined, and a prediction model for the natural frequency of the vibration isolator was constructed accordingly.

[0024] According to the design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by the present invention, the influencing factors include, but are not limited to, corrugation period, corrugation amplitude, structural wall thickness, negative Poisson's ratio structural side length, overall length, overall width, overall height, and weight of the load.

[0025] According to the design method of a three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by the present invention, after obtaining the final structural parameters of the vibration isolator, the method further includes the following steps: manufacturing the vibration isolator based on the final structural parameters, wherein the honeycomb structure is made of aluminum alloy and integrally formed using 3D printing technology, and after the honeycomb structure is formed, holes are drilled in its cell wall to finally form a three-dimensional corrugated honeycomb sound insulation and vibration isolator.

[0026] Beneficial effects:

[0027] I. The three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by this invention combines the characteristics of traditional negative Poisson's ratio honeycomb, the energy absorption performance of traditional hexagonal coplanar structures, the hindrance mechanism of periodic structures, local resonance of phonon crystals, impedance mismatch, and waveform conversion mechanisms. A corrugated structure is added, which effectively reduces the non-planar stiffness, enabling it to absorb some vibration energy in three directions and achieve low-frequency vibration isolation in all three directions. This effectively improves the vibration isolation performance of the device. When vibration energy is transmitted through the device, the structure undergoes vertical deformation, converting some energy into internal strain energy. Elastic waves passing through the corrugated structure experience impedance mismatch and waveform conversion, transforming into longitudinal waves that are difficult to propagate, further enhancing the energy absorption effect.

[0028] Second, compared with traditional honeycomb structures, corrugated honeycomb structures exhibit superior tensile and compressive recoverability and energy absorption characteristics. In particular, they ensure the initial stiffness of the vibration isolator and the lateral stability during deformation in the vertical direction, giving the structure good high static stiffness, strong recoverability, and the ability to provide repeatable protection against vibration, providing better durability than existing honeycomb structures.

[0029] Third, by increasing the opportunities for sound waves to come into contact with the material through the holes in the honeycomb structure, the sound waves will be reflected and scattered multiple times inside the holes after entering, thereby consuming the energy of the sound waves and achieving the purpose of noise reduction, thereby improving the sound absorption effect, and together achieving local resonance in the low frequency band, absorbing the elastic energy waves in the low frequency band, generating a low frequency broadband gap, and isolating the propagation of low frequency vibrations.

[0030] Fourth, by combining negative Poisson's ratio structure, corrugated honeycomb structure and porous structure, the energy absorption characteristics and local resonance mechanism are fully combined to enhance the vibration reduction effect in the low frequency range and achieve vibration isolation and sound insulation.

[0031] V. The design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by this invention can customize vibration isolators with different natural frequencies for different equipment and different vibration frequencies. By adjusting the corrugation period, corrugation amplitude, structural wall thickness, negative Poisson's ratio structure side length, overall length, overall width, and overall height, the natural frequency can be designed, thereby achieving the required vibration isolation performance. Compared with traditional negative Poisson's ratio structures and traditional hexagonal honeycomb structures, this invention allows for the design of natural frequencies, has a wider range of applications, and is better able to achieve low-frequency vibration isolation while also providing sound insulation, which is beneficial for its engineering applications in the field of shipbuilding. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided in the embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the corrugated structure along the vertical direction of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided in the embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the structure of a negative Poisson's ratio cell provided in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the holes on the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided in the embodiment of the present invention.

[0037] Figure 5 This is a flowchart illustrating the design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided in the embodiments of the present invention.

[0038] Figure 6 This is a flowchart of the method for constructing the natural frequency prediction model of the vibration isolator provided in the embodiments of the present invention.

[0039] Figure label:

[0040] 10. Negative Poisson's ratio cell; 11. Transverse cell wall; 12. Longitudinal cell wall; 120. Inclined plate; 13. Pore. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] To better understand the three-dimensional corrugated honeycomb sound and vibration isolator and its design method provided in the embodiments of the present invention, its application background is introduced first. With the rapid development of ship technology, the requirements for ship vibration and noise control are becoming increasingly stringent. Currently, the main design method for vibration and sound isolation of ship power systems is to adopt vibration isolation technology. At present, traditional hexagonal honeycomb structure and traditional negative Poisson's ratio structure are more commonly used. The electronic cabinet is installed on the ground base through four vibration isolators, which can reduce the vibration and noise of the ship cabinet to a certain extent.

[0043] However, in practical applications, it has been found that traditional negative Poisson's ratio and traditional hexagonal honeycomb vibration isolation structures can only achieve coplanar vibration isolation, but have no vibration isolation effect in the opposite direction. Therefore, traditional hexagonal honeycomb structures and traditional negative Poisson's ratio structures can hardly meet the increasingly high vibration isolation and sound insulation performance indicators of ships.

[0044] To address the above problems and findings, embodiments of the present invention provide a three-dimensional corrugated honeycomb sound insulation and vibration isolator and its design method, which can effectively reduce the non-planar stiffness, enabling it to not only absorb partial vibration energy in three directions, but also achieve vibration isolation in the low-frequency range in three directions, thus effectively improving vibration isolation performance.

[0045] The following is combined Figures 1-6 The present invention describes the three-dimensional corrugated honeycomb sound insulation and vibration isolator and its design method.

[0046] Reference Figure 1 and Figure 2 A three-dimensional corrugated honeycomb sound insulation and vibration isolator includes multiple negative Poisson's ratio cells 10; the multiple negative Poisson's ratio cells 10 are arranged periodically in the same plane along the transverse and longitudinal directions to form a three-dimensional honeycomb structure, and in the vertical direction perpendicular to the aforementioned plane, the cell wall of the negative Poisson's ratio cells 10 exhibits a periodic corrugated structure.

[0047] The vibration isolator provided in this invention combines the characteristics of traditional negative Poisson's ratio honeycomb, the energy absorption performance of traditional coplanar structures, the retardation mechanism of periodic structures, local resonance of phononic crystals, impedance mismatch, and waveform conversion mechanisms. A corrugated structure is added, which effectively reduces the out-of-plane stiffness, enabling it to absorb some vibration energy in three directions and achieve low-frequency vibration isolation in three directions. This effectively improves the vibration isolation performance of the device. When vibration energy is transmitted through the device, the structure undergoes vertical deformation, converting some energy into internal strain energy. Elastic waves passing through the corrugated structure experience impedance mismatch and waveform conversion, transforming into longitudinal waves that are difficult to propagate, further enhancing the energy absorption effect.

[0048] In addition, the corrugated honeycomb structure exhibits superior tensile and compressive recoverability and energy absorption characteristics compared to traditional honeycomb structures. In particular, it ensures the initial stiffness of the vibration isolator and the lateral stability during deformation in the vertical direction, giving the structure good high static stiffness, strong recoverability, and the ability to provide repeatable protection against vibration, providing better durability than existing honeycomb structures.

[0049] In one embodiment of the present invention, the above-mentioned corrugated structure adopts a sinusoidal corrugated structure.

[0050] In one embodiment of the present invention, reference is made to Figure 3 The cell wall of the negative Poisson's ratio cell 10 includes a pair of transverse cell walls 11 extending laterally and arranged alternately in the longitudinal direction, and a pair of longitudinal cell walls 12 extending longitudinally and arranged alternately in the transverse direction. The transverse cell walls 11 and the longitudinal cell walls 12 are connected in sequence, making the negative Poisson's ratio cell 10 a closed structure, and the longitudinal cell walls 12 are bent toward the inside of the negative Poisson's ratio cell 10. This arrangement allows the honeycomb structure composed of multiple negative Poisson's ratio cells 10 to have a negative Poisson's ratio effect in the two-dimensional space formed by the transverse and longitudinal directions, thereby effectively absorbing vibrational energy in both the transverse and longitudinal directions.

[0051] In one embodiment of the present invention, the longitudinal cell wall 12 of the negative Poisson's ratio cell 10 includes a pair of inclined plates 120. The opposite ends of the pair of inclined plates 120 are respectively connected to a pair of transverse cell walls 11, and the corresponding ends are inclined towards the inside of the negative Poisson's ratio cell 10 and connected, so that the longitudinal cell wall 12 of the negative Poisson's ratio cell 10 is "V" shaped, and the negative Poisson's ratio cell 10 as a whole presents a hexagonal structure.

[0052] In some alternative embodiments, the specific material and molding method of the negative Poisson's ratio cell 10 can be flexibly designed according to actual needs.

[0053] In one embodiment of the present invention, a pair of inclined plates 120 constituting the longitudinal cell wall 12 are integrally formed.

[0054] In one embodiment of the present invention, the longitudinal cell walls 12 of a plurality of negative Poisson's ratio cells 10 arranged longitudinally are positioned correspondingly and integrally formed, so that the honeycomb structure presents a zigzag shape in the longitudinal direction.

[0055] In one embodiment of the present invention, a honeycomb structure composed of a plurality of negative Poisson's ratio cells 10 is integrally formed.

[0056] Using a one-piece molding method helps to ensure the structural integrity and material consistency of the honeycomb structure, eliminates connection points between different components, and reduces the transmission path of vibration energy.

[0057] In some alternative embodiments, the negative Poisson's ratio cell 10 may be made of rubber or aluminum alloy.

[0058] Specifically, due to the high damping characteristics of rubber materials, they possess excellent energy dissipation capabilities, thus achieving good vibration isolation. However, under specific dimensions and support strengths, rubber materials are relatively heavy, which may increase the pressure under the electronic cabinet, while aluminum alloy sheets are relatively lightweight. Therefore, in this embodiment, the negative Poisson's ratio cell 10 is made of aluminum alloy material.

[0059] In one embodiment of the present invention, the honeycomb structure composed of multiple negative Poisson's ratio cells 10 is made of aluminum alloy and integrally formed using 3D printing technology.

[0060] In one embodiment of the present invention, reference is made to Figure 4 The negative Poisson's ratio cell 10 has pores 13 on its cell wall. The pores 13 increase the surface area of ​​the material, thereby increasing the opportunity for sound waves to come into contact with the material. After entering the pores 13, the sound waves are reflected and scattered multiple times inside the pores 13, thereby consuming the energy of the sound waves and achieving the purpose of noise reduction, thus improving the sound absorption effect. In addition, the stiffness of the vibration isolator will be significantly reduced due to the influence of the pores 13, thereby achieving vibration isolation at lower frequencies and improving the vibration isolation effect. At the same time, it can make the vibration isolator more effectively absorb low-frequency sound waves.

[0061] In some optional embodiments, the holes 13 can be disposed on the transverse cell wall 11 of the negative Poisson's ratio cell 10, or on the longitudinal cell wall 12, or on both the transverse cell wall 11 and the longitudinal cell wall 12. The holes 13 can be designed as traditional round holes or holes of other shapes. They can be evenly distributed or unevenly distributed. The size, shape, depth and distribution of the holes 13 will affect their sound absorption effect.

[0062] In one specific embodiment of the present invention, pores 13 are provided on both the transverse cell wall 11 and the longitudinal cell wall 12 of the negative Poisson's ratio cell 10 to improve the sound absorption effect. The pores 13 are traditional round holes, and their distribution is uniform to avoid local over-density or under-density. This not only allows for more uniform absorption of sound waves of different frequencies but also facilitates manufacturing. Furthermore, the stiffness of the vibration isolator in the transverse, longitudinal, and vertical directions is significantly reduced due to the pores 13, further lowering the natural frequency of the vibration isolator and achieving vibration isolation at lower frequencies, thus improving the vibration isolation effect and enabling the vibration isolator to absorb low-frequency sound waves more effectively.

[0063] It is understood that the ripple period, ripple amplitude, cell wall thickness and cell wall length in the negative Poisson's ratio cell 10, as well as the overall length, overall width and overall height of the honeycomb structure, can be flexibly designed according to actual needs, such as the target frequency and weight of the required vibration isolation object, and no specific restrictions are imposed in the embodiments of the present invention.

[0064] It is understood that the negative Poisson's ratio cell 10 includes, but is not limited to, the structures, materials and molding methods listed above. Other structures or forms of negative Poisson's ratio cell 10 are acceptable as long as the honeycomb structure they form has a negative Poisson's ratio effect in the plane formed by the horizontal and vertical directions.

[0065] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0066] The design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator provided by the present invention is described below. The design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator described below can be referred to in correspondence with the three-dimensional corrugated honeycomb sound insulation and vibration isolator described above.

[0067] Reference Figure 5 and Figure 6 A design method for a three-dimensional corrugated honeycomb sound insulation and vibration isolator includes the following steps:

[0068] Step 10: Construct a prediction model for the natural frequency of the vibration isolator.

[0069] Step 11: Based on the natural frequency prediction model of the vibration isolator and the weight and target frequency of the object to be isolated, obtain the predicted structural parameters of the vibration isolator.

[0070] Step 12: Conduct simulation verification based on the predicted structural parameters. When the simulation results meet the requirements, obtain the final structural parameters of the vibration isolator.

[0071] In one embodiment of the present invention, the natural frequency prediction model of the vibration isolator is constructed in the following manner:

[0072] Step 100: Determine several factors affecting the natural frequency of the vibration isolator.

[0073] Step 101: Systematically evaluate the influence of different combinations of multiple influencing factors on the natural frequency of the vibration isolator through orthogonal experiments.

[0074] Step 102: Based on the orthogonal experimental results, determine the optimal horizontal combination scheme, and use it to construct the natural frequency prediction model of the vibration isolator.

[0075] Specifically, the factors affecting the natural frequency of the vibration isolator include, but are not limited to, ripple period, ripple amplitude, structural wall thickness, negative Poisson's ratio structural side length, overall length, overall width, overall height, and weight of the load.

[0076] Before constructing the model, numerous experiments were conducted to identify several factors affecting the natural frequency of the vibration isolator. Orthogonal experiments were then used to select representative factors from the comprehensive tests for further analysis. The impact of different combinations of these factors at various levels on the natural frequency of the vibration isolator was systematically evaluated. Based on the orthogonal experimental results, the optimal combination of levels was determined, thus forming a complete predictive model for the natural frequency of the vibration isolator. After the model was constructed, the weight of the object to be isolated and the target frequency were considered. The predicted structural parameters of the vibration isolator are obtained by substituting the values ​​into the model and then plotting them. The simulation software is then used to analyze the modes under ideal conditions. If the simulation results meet the requirements, the final structural parameters of the vibration isolator are obtained, laying the foundation for subsequent manufacturing and experimental verification.

[0077] It is understood that simulation software such as Wave6, COMSOL Multiphysics, and Abaqus can be used, and the specific software can be selected according to actual needs. No specific restrictions are imposed in this embodiment of the invention.

[0078] In one embodiment of the present invention, the design method of the three-dimensional corrugated honeycomb sound insulation and vibration isolator further includes the following steps:

[0079] Step 13: Fabricate the vibration isolator based on the final structural parameters. The honeycomb structure is made of aluminum alloy and is integrally formed using 3D printing technology. After the honeycomb structure is formed, holes are drilled in its cell walls to finally form the vibration isolator.

[0080] Specifically, the honeycomb structure is made of aluminum alloy and is formed using 3D printing technology. This design abandons the traditional rubber material. Although rubber has a good vibration isolation effect, it is heavier for the same support strength, which may increase the pressure under the electronic cabinet for certain sizes. Aluminum alloy material can make the vibration isolator lighter, with higher energy absorption efficiency and better frequency response characteristics.

[0081] After the honeycomb structure is formed, holes are drilled in its transverse cell wall 11 and longitudinal cell wall 12, and finally it is formed into a three-dimensional corrugated honeycomb sound insulation and vibration isolator.

[0082] The three-dimensional corrugated honeycomb sound insulation and vibration isolator and its design method provided by the embodiments of the present invention combine the characteristics of traditional negative Poisson's ratio honeycomb, the energy absorption performance of traditional hexagonal coplanar structures, the hindrance mechanism of periodic structures, local resonance of phononic crystals, impedance mismatch and waveform conversion mechanism, and add a corrugated structure. The added corrugated structure can effectively reduce the non-planar stiffness, so that it can not only absorb part of the vibration energy in three directions, but also achieve vibration isolation in the low frequency range in three directions, effectively improving the vibration isolation performance of the device. When the vibration energy is transmitted through the device, the structure undergoes vertical deformation, and part of the energy is converted into internal strain energy. The elastic wave will generate impedance mismatch after passing through the corrugated structure, and will also undergo waveform conversion, transforming into a longitudinal wave that is not easy to propagate, further enhancing the energy absorption effect.

[0083] In addition, the corrugated honeycomb structure exhibits better tensile and compressive recoverability and energy absorption characteristics compared with the traditional honeycomb structure. In particular, it ensures the initial stiffness of the vibration isolator and the lateral stability during deformation in the vertical direction, giving the structure good high static stiffness, strong recoverability, and the ability to provide repeatable protection against vibration, providing better durability than existing honeycomb structures.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-dimensional corrugated honeycomb acoustic and vibration insulator, characterized in that, The application relates to a three-dimensional honeycomb structure, comprising: a plurality of negative Poisson's ratio cells (10) which are periodically arranged in a transverse direction and a longitudinal direction in a same plane and form a three-dimensional honeycomb structure; in a vertical direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell (10) presents a periodic corrugated structure; the cell wall of the negative Poisson's ratio cell (10) is provided with a hole (13); the cell wall of the negative Poisson's ratio cell (10) comprises a pair of transverse cell walls (11) which extend in the transverse direction and are arranged in the longitudinal direction, and a pair of longitudinal cell walls (12) which extend in the longitudinal direction and are arranged in the transverse direction; the transverse cell wall (11) and the longitudinal cell wall (12) are sequentially connected to form a closed structure, and the longitudinal cell wall (12) is bent towards the inside of the negative Poisson's ratio cell (10); the longitudinal cell wall (12) comprises a pair of inclined plates (120), one end of the pair of inclined plates (120) is connected with the pair of transverse cell walls (11) respectively, and the corresponding end is inclined towards the inside of the negative Poisson's ratio cell (10) and is connected; so that the longitudinal cell wall (12) of the negative Poisson's ratio cell (10) presents a V shape, and the negative Poisson's ratio cell (10) presents a hexagonal structure as a whole.

2. The three-dimensional corrugated honeycomb acoustic and vibration insulator of claim 1, wherein, The three-dimensional honeycomb structure is integrally formed by using an aluminum alloy material.

3. The three-dimensional corrugated honeycomb acoustic and vibration insulator of claim 1, wherein, The holes (13) are uniformly distributed.

4. A method of designing a three-dimensional corrugated honeycomb acoustic and vibration isolator, characterized by, The application further relates to a method for manufacturing the three-dimensional honeycomb structure, comprising the following steps: constructing a natural frequency prediction model of the vibration isolator; obtaining predicted structure parameters of the vibration isolator based on the natural frequency prediction model of the vibration isolator and the weight and target frequency of an object to be isolated; when the simulation result meets the requirements, obtaining final structure parameters of the vibration isolator.

5. The method of designing a three-dimensional corrugated honeycomb acoustic and vibration isolator of claim 4, wherein, The construction of the natural frequency prediction model of the vibration isolator comprises the following steps: determining a plurality of influence factors of the natural frequency of the vibration isolator; systematically evaluating the influence of different level combinations of the plurality of influence factors on the natural frequency of the vibration isolator through orthogonal experiments; based on the results of the orthogonal experiments, determining an optimal level combination scheme, and constructing the natural frequency prediction model of the vibration isolator based on the optimal level combination scheme.

6. The method of designing a three-dimensional corrugated honeycomb acoustic and vibration isolator of claim 5, wherein, The influence factors include a corrugated period, a corrugated amplitude, a structure wall thickness, a negative Poisson's ratio structure side length, an overall length, an overall width, an overall height and a weight of a heavy object.

7. The method of designing a three-dimensional corrugated honeycomb acoustic and vibration isolator of claim 6, wherein, After the final structure parameters of the vibration isolator are obtained, the method further comprises the following steps: manufacturing the vibration isolator based on the final structure parameters; wherein the honeycomb structure is integrally formed by using an aluminum alloy material and a 3D printing technology, the hole is drilled in the cell wall of the honeycomb structure after the honeycomb structure is formed, and finally the three-dimensional honeycomb structure is obtained.

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