Three-way corrugated honeycomb sound insulation vibration isolator and design method thereof

Abstract

The invention relates to the technical field of vibration isolation and sound insulation, and provides a three-way corrugated honeycomb sound insulation vibration isolator and a design method thereof.The sound insulation vibration isolator comprises a plurality of negative Poisson's ratio cell elements, and the multiple negative Poisson's ratio cell elements are periodically arranged in the same plane in the transverse direction and the longitudinal direction to form a three-dimensional honeycomb structure; in the vertical direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell element is of a periodic corrugated structure. Through the arrangement, the rigidity of different surfaces can be effectively reduced through the corrugated structure, so that part of vibration energy in three directions can be absorbed, vibration isolation in a low-frequency range in the three directions can be achieved, the vibration isolation performance of the device is effectively improved, when the vibration energy is transmitted through the device, the structure deforms vertically, part of the energy is converted into internal strain energy, and the vibration isolation performance is improved. When elastic waves pass through the corrugated structure, impedance mismatch can be generated, waveform conversion can also happen, the elastic waves are converted into longitudinal waves which are not prone to propagation, and the energy absorption effect is further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of vibration isolation and sound insulation, and in particular to a three-way corrugated honeycomb sound insulation and vibration isolator and a design method thereof. Background Art

[0002] With the rapid development of ship technology, the requirements for ship vibration and noise control are becoming increasingly stringent. The safety of electronic cabinet equipment on ships is directly related to the overall safety performance of the ship. During the normal navigation of the ship, the structural vibration and noise levels are high, which poses a potential threat to the electronic cabinet. As ships and their electronic equipment tend to be larger, the natural frequency of the hull structure and the excitation frequency of the cabinet are reduced accordingly, which makes it easier for the vibration generated by the electronic cabinet to excite the resonance of the hull structure, which in turn leads to more significant vibration and noise problems. Therefore, optimizing the design to reduce these negative effects becomes particularly important for maintaining the safety and performance of ships and electronic equipment.

[0003] The current design method for vibration and sound isolation of ship power systems mainly adopts vibration isolation technology. Currently, the traditional hexagonal honeycomb structure and the traditional negative Poisson's ratio structure are more commonly used. The electronic cabinet is installed on the ground base through 4 vibration isolators, which can reduce the vibration and noise of the ship cabinet to a certain extent.

[0004] However, the traditional negative Poisson's ratio and traditional hexagonal honeycomb vibration isolation structure can only achieve coplanar vibration isolation, but have no vibration isolation effect in the non-planar directions. Therefore, the traditional hexagonal honeycomb structure and the traditional negative Poisson's ratio structure have been difficult to meet the increasingly high vibration isolation and sound insulation performance indicators of ships. Summary of the invention

[0005] The present invention provides a three-way corrugated honeycomb sound insulation and vibration isolator and a design method thereof, which are used to solve the problem that traditional hexagonal honeycomb structures and negative Poisson's ratio structures in the prior art are difficult to meet the vibration isolation and sound insulation performance indicators. The three-way corrugated honeycomb sound insulation and vibration isolator can effectively reduce the eccentric stiffness, so that it can not only absorb part of the vibration energy in three directions respectively, but also realize vibration isolation in the low-frequency range in three directions, thereby effectively improving the vibration isolation performance.

[0006] The present invention provides a three-way corrugated honeycomb sound and vibration isolator, comprising: A plurality of negative Poisson's ratio cells, wherein the plurality of negative Poisson's ratio cells are periodically arranged in the horizontal direction and the vertical direction in the same plane to form a three-dimensional honeycomb structure; In a direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell presents a periodic corrugated structure.

[0007] According to a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the cell wall of the negative Poisson's ratio cell comprises: a pair of transverse cell walls extending in the transverse direction and arranged alternately in the longitudinal direction, and a pair of longitudinal cell walls extending in the longitudinal direction and arranged alternately in the transverse direction; The transverse cell wall and the longitudinal cell wall are sequentially connected to form a closed structure, and the longitudinal cell wall is bent toward the inner side of the negative Poisson's ratio cell.

[0008] According to a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the longitudinal cell wall includes a pair of inclined plates, and the opposite ends of the pair of inclined plates are respectively connected to a pair of transverse cell walls, and the corresponding ends are inclined toward and connected to the inner side of the negative Poisson's ratio cell.

[0009] According to a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the three-dimensional honeycomb structure is integrally formed by using an aluminum alloy material.

[0010] According to a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, holes are arranged on the transverse cell walls and / or the longitudinal cell walls.

[0011] According to a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the holes are arranged on the transverse cell walls and / or the longitudinal cell walls.

[0012] According to the three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the holes are evenly distributed.

[0013] A design method for a three-way corrugated honeycomb sound and vibration isolator provided by the present invention comprises the following steps: Construct a natural frequency prediction model for vibration isolators; 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; A simulation check is carried out based on the predicted structural parameters, and when it is determined that the simulation results meet the requirements, the final structural parameters of the vibration isolator are obtained.

[0014] According to a design method of a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the construction of a natural frequency prediction model of the vibration isolator includes: Determine several factors that affect the natural frequency of the vibration isolator; The effects of different level combinations of multiple influencing factors on the natural frequency of the vibration isolator are systematically evaluated through orthogonal experiments; Based on the orthogonal experimental results, the optimal horizontal combination scheme is determined, and the natural frequency prediction model of the vibration isolator is constructed based on it.

[0015] According to a design method for a three-way corrugated honeycomb sound and vibration isolator provided by the present invention, the influencing factors include but are not limited to corrugation period, corrugation amplitude, structure wall thickness, negative Poisson's ratio structure side length, overall length, overall width, overall height, and weight of heavy objects.

[0016] According to a design method of a three-way 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 is integrally formed using 3D printing technology, and after the honeycomb structure is formed, holes are drilled on the cell walls thereof to finally form a three-way corrugated honeycomb sound insulation and vibration isolator.

[0017] Beneficial effects: 1. The three-way corrugated honeycomb sound insulation and vibration isolator provided by the present invention combines the characteristics of traditional negative Poisson's ratio honeycomb, traditional hexagonal coplanar structure energy absorption performance, periodic structure blocking mechanism, phononic crystal local resonance, impedance mismatch and waveform conversion mechanism, and adds a corrugated structure. The added corrugated structure can effectively reduce the eccentric stiffness, so that it can not only absorb part of the vibration energy in three directions respectively, but also realize 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 produce impedance mismatch when passing through the corrugated structure, and waveform conversion will also occur, which is converted into a longitudinal wave that is not easy to propagate, further enhancing the energy absorption effect.

[0018] 2. Compared with the traditional honeycomb structure, the corrugated honeycomb structure exhibits better tensile and compressive recoverability and energy absorption characteristics, especially in the vertical direction, it ensures the initial stiffness of the isolator and the lateral stability during the deformation process, so that the structure has good high static stiffness and strong recoverability. It can provide repetitive protection against vibration and provide better durability than the existing honeycomb.

[0019] 3. The holes in the honeycomb structure increase the chances of sound waves coming into contact with the material. After entering the holes, the sound waves will be reflected and scattered multiple times inside the holes, thereby consuming the energy of the sound waves and achieving the purpose of noise reduction, thereby improving the sound absorption effect, and jointly achieving local resonance in the low-frequency band, absorbing low-frequency elastic energy waves, generating low-frequency broadband band gaps, and isolating low-frequency vibration propagation.

[0020] 4. The combination of negative Poisson's ratio structure, corrugated honeycomb structure and hole structure fully combines the energy absorption characteristics and local resonance mechanism, enhances the shock absorption effect in the low-frequency band, and can achieve vibration isolation and sound isolation.

[0021] 5. The design method of the three-way corrugated honeycomb sound and vibration isolator provided by the present invention can customize vibration isolators with different natural frequencies for different equipment and different vibration frequencies. The natural frequency design is achieved by adjusting the corrugation period, corrugation amplitude, structural wall thickness, negative Poisson's ratio structure side length, overall length, overall width, and overall height, thereby achieving vibration isolation performance indicators. Compared with the traditional negative Poisson's ratio structure and the traditional hexagonal honeycomb, the present invention realizes the design of natural frequency, has a wider range of applications, can better achieve low-frequency vibration isolation, and can also achieve sound insulation, which is conducive to its engineering application in the field of ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic structural diagram of a three-way corrugated honeycomb sound and vibration isolator provided in an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the corrugated structure along the vertical direction of the three-way corrugated honeycomb sound and vibration isolator provided by an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the structure of a negative Poisson's ratio cell provided by an embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of holes on a three-way corrugated honeycomb sound and vibration isolator provided in an embodiment of the present invention.

[0027] Figure 5 The figure is a schematic diagram of the process of the design method of the three-way corrugated honeycomb sound and vibration isolator provided in an embodiment of the present invention.

[0028] Figure 6 It is a flow chart of a method for constructing a natural frequency prediction model of a vibration isolator provided in an embodiment of the present invention.

[0029] Reference numerals: 10. Negative Poisson's ratio cell; 11. Transverse cell wall; 12. Longitudinal cell wall; 120. Inclined plate; 13. Hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to better understand the three-way corrugated honeycomb sound insulation and vibration isolator and its design method provided by the embodiment of the present invention, its application background is first introduced. With the rapid development of ship technology, the requirements for ship vibration and noise control are becoming increasingly stringent. The current design method for vibration and sound insulation of ship power systems mainly adopts vibration isolation technology. Currently, the traditional hexagonal honeycomb structure and the traditional negative Poisson's ratio structure are more commonly used. The electronic cabinet is installed on the ground base through 4 vibration isolators, which can reduce the vibration and noise of the ship cabinet to a certain extent.

[0032] However, it is found in actual applications that the 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 non-planar directions. Therefore, the traditional hexagonal honeycomb structure and the traditional negative Poisson's ratio structure have been difficult to meet the increasingly high vibration isolation and sound insulation performance indicators of ships.

[0033] In response to the above problems and findings, the embodiments of the present invention provide a three-way corrugated honeycomb sound and vibration isolator and a design method thereof, which can effectively reduce the out-of-plane stiffness, so that it can not only absorb part of the vibration energy in three directions respectively, but also achieve vibration isolation in the low-frequency range in three directions, effectively improving the vibration isolation performance.

[0034] Combine the following Figure 1-Figure 6 The invention describes a three-way corrugated honeycomb sound and vibration isolator and a design method thereof.

[0035] Reference Figure 1 and Figure 2 A three-way corrugated honeycomb sound insulation and vibration isolator comprises a plurality of negative Poisson's ratio cells 10; the plurality of negative Poisson's ratio cells 10 are periodically arranged in the horizontal and vertical directions in the same plane to form a three-dimensional honeycomb structure, and in the vertical direction perpendicular to the above plane, the cell wall of the negative Poisson's ratio cell 10 presents a periodic corrugated structure.

[0036] The vibration isolator provided by the embodiment of the present invention combines the characteristics of traditional negative Poisson's ratio honeycomb, traditional coplanar structure energy absorption performance, periodic structure blocking mechanism, phononic crystal local resonance, impedance mismatch and waveform conversion mechanism, and adds a corrugated structure. The added corrugated structure can effectively reduce the eccentric stiffness, so that it can not only absorb part of the vibration energy in three directions respectively, but also realize 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 produce impedance mismatch when passing through the corrugated structure, and waveform conversion will also occur, which is converted into a longitudinal wave that is not easy to propagate, further enhancing the energy absorption effect.

[0037] In addition, the corrugated honeycomb structure exhibits better tensile and compressive recoverability and energy absorption characteristics than the traditional honeycomb structure, especially in the vertical direction, it ensures the initial stiffness of the isolator and the lateral stability during the deformation process, so that the structure has good high static stiffness and strong recoverability, can provide repetitive protection against vibration, and provide better durability than the existing honeycomb structure.

[0038] In one embodiment of the present invention, the corrugated structure is a sinusoidal corrugated structure.

[0039] In one embodiment of the present invention, referring to Figure 3 The cell wall of the negative Poisson's ratio cell 10 includes a pair of transverse cell walls 11 extending in the transverse direction and arranged alternately in the longitudinal direction, and a pair of longitudinal cell walls 12 extending in the longitudinal direction and arranged alternately in the transverse direction; the transverse cell walls 11 and the longitudinal cell walls 12 are sequentially connected so that the negative Poisson's ratio cell 10 is a closed structure, and the longitudinal cell walls 12 are bent toward the inside of the negative Poisson's ratio cell 10. In this way, the honeycomb structure composed of a plurality of negative Poisson's ratio cells 10 can have a negative Poisson's ratio effect in a two-dimensional space formed by the transverse and longitudinal directions, thereby effectively absorbing vibration energy in both the transverse and longitudinal directions.

[0040] 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, and the ends of the pair of inclined plates 120 that are separated from each other are respectively connected to a pair of transverse cell walls 11, and the corresponding ends are inclined and connected toward the inner side of the negative Poisson's ratio cell 10, 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.

[0041] In some optional embodiments, the specific material and molding method of the negative Poisson's ratio cell 10 can be flexibly designed according to actual needs.

[0042] In one embodiment of the present invention, a pair of inclined plates 120 constituting the longitudinal cell wall 12 are integrally formed.

[0043] In one embodiment of the present invention, the longitudinal cell walls 12 of the plurality of negative Poisson's ratio cells 10 arranged in the longitudinal direction are positioned correspondingly and are integrally formed, so that the honeycomb structure presents a broken line shape in the longitudinal direction.

[0044] In one embodiment of the present invention, a honeycomb structure composed of a plurality of negative Poisson's ratio cells 10 is integrally formed.

[0045] The one-piece molding method is beneficial to ensure the structural integrity and material consistency of the honeycomb structure, eliminate the connection points between different components, and reduce the transmission path of vibration energy.

[0046] In some optional embodiments, the negative Poisson's ratio cell 10 may be made of rubber material or aluminum alloy material.

[0047] Specifically, due to the high damping characteristics of the rubber material, it has good energy dissipation capacity, thereby being able to achieve a good vibration isolation effect. However, under a specific size and support strength, the rubber material is heavy, which may increase the pressure under the electronic cabinet, while the aluminum alloy sheet has a relatively light weight. Therefore, in this embodiment, the negative Poisson's ratio cell 10 is made of aluminum alloy material.

[0048] In one embodiment of the present invention, the honeycomb structure composed of a plurality of negative Poisson's ratio cells 10 is made of aluminum alloy and is integrally formed using 3D printing technology.

[0049] In one embodiment of the present invention, referring to Figure 4 , holes 13 are arranged on the cell wall of the negative Poisson's ratio cell 10. The holes 13 can increase the surface area of ​​the material, thereby increasing the chance of sound waves contacting the material. After entering the holes 13, the sound waves will be reflected and scattered multiple times inside the holes 13, thereby consuming the energy of the sound waves, achieving the purpose of noise reduction, thereby improving the sound absorption effect. In addition, the stiffness of the vibration isolator will be significantly reduced due to the influence of the holes 13, thereby achieving lower frequency vibration isolation of the vibration isolator, improving the vibration isolation effect, and at the same time making the vibration isolator more effective in absorbing low-frequency sound waves.

[0050] In some optional embodiments, the holes 13 can be arranged 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, and can be evenly distributed or unevenly distributed. The size, shape, depth and distribution of the holes 13 will affect their sound absorption effect.

[0051] In a specific embodiment of the present invention, holes 13 are provided on 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 holes 13 are traditional round holes, and the distribution is uniform, so as to avoid local over-density or over-sparseness, which can not only absorb sound waves of different frequencies more evenly, but also facilitate processing and manufacturing. In addition, the stiffness of the vibration isolator in the transverse, longitudinal and vertical directions will be significantly reduced due to the influence of the holes 13, further reducing the natural frequency of the vibration isolator, achieving lower frequency vibration isolation of the vibration isolator, improving the vibration isolation effect, and making the vibration isolator more effective in absorbing low-frequency sound waves.

[0052] It can be understood that the corrugation period, corrugation amplitude, cell wall thickness and cell wall length in the negative Poisson's ratio cell 10, as well as the overall length, overall width, overall height and other parameters 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 made in the embodiments of the present invention.

[0053] It is understandable 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 cells 10 are acceptable as long as the honeycomb structure they constitute has a negative Poisson's ratio effect in the plane formed by the transverse and longitudinal directions.

[0054] It is to be understood that, without mutual contradiction, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification.

[0055] The following describes a design method for a three-way corrugated honeycomb sound insulation and vibration isolator provided by the present invention. The design method for the three-way corrugated honeycomb sound insulation and vibration isolator described below can correspond to the three-way corrugated honeycomb sound insulation and vibration isolator described above.

[0056] Reference Figure 5 and Figure 6 , a design method of a three-way corrugated honeycomb sound insulation and vibration isolator, comprising the following steps: Step 10: Construct a natural frequency prediction model for the vibration isolator.

[0057] 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, the predicted structural parameters of the vibration isolator are obtained.

[0058] Step 12: Carry out simulation verification based on the predicted structural parameters, and when it is determined that the simulation results meet the requirements, obtain the final structural parameters of the vibration isolator.

[0059] In one embodiment of the present invention, the natural frequency prediction model of the vibration isolator is constructed in the following manner: Step 100: Determine several influencing factors that affect the natural frequency of the vibration isolator.

[0060] Step 101: Systematically evaluate the effects of different level combinations of multiple influencing factors on the natural frequency of the vibration isolator through orthogonal experiments.

[0061] Step 102: Based on the orthogonal experimental results, determine the optimal horizontal combination scheme, and use it to construct a natural frequency prediction model of the vibration isolator.

[0062] Specifically, the above-mentioned factors affecting the natural frequency of the vibration isolator include but are not limited to the corrugation period, corrugation amplitude, structure wall thickness, negative Poisson's ratio structure side length, overall length, overall width, overall height, and weight of heavy objects.

[0063] Before building the model, a number of influencing factors that affect the natural frequency of the vibration isolator are determined through a large number of experiments, and some representative factors are selected from the comprehensive test by orthogonal experiments. The influence of different level combinations of multiple influencing factors on the natural frequency of the vibration isolator is systematically evaluated. The optimal level combination scheme is determined according to the orthogonal test results, thus forming a complete vibration isolator natural frequency prediction model. After the model is built, the weight of the object to be isolated and the target frequency to be isolated are calculated. Substitute it into the model at times to reversely measure the predicted structural parameters of the isolator, draw it according to the predicted structural parameters, and add simulation software to analyze its ideal mode. If the simulation result meets the requirements, the final structural parameters of the isolator are obtained, which lays the foundation for subsequent manufacturing and experimental verification.

[0064] It is understandable that the simulation software may be Wave6, COMSOL Multiphysics, Abaqus, etc., and the specific one may be selected according to actual needs, and is not specifically limited in the embodiments of the present invention.

[0065] In one embodiment of the present invention, the design method of the three-way corrugated honeycomb sound and vibration isolator further includes the following steps: Step 13: The vibration isolator is manufactured based on the final structural parameters, wherein 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 on the cell walls to finally form the vibration isolator.

[0066] Specifically, the honeycomb structure is made of aluminum alloy and formed using 3D printing technology. This configuration abandons the traditional rubber material. Although the rubber material has a better vibration isolation effect, it is heavier at the same supporting strength. For specific sizes, it may increase the pressure under the electronic cabinet. The aluminum alloy material can make the vibration isolator lighter, have higher energy absorption efficiency and better frequency response characteristics.

[0067] After the honeycomb structure is formed, holes are drilled on the transverse cell wall 11 and the longitudinal cell wall 12 thereof, and finally a three-way corrugated honeycomb sound and vibration isolator is formed.

[0068] The three-way corrugated honeycomb sound insulation and vibration isolator and the design method thereof provided by the embodiment of the present invention combine the characteristics of the traditional negative Poisson's ratio honeycomb, the traditional hexagonal coplanar structure energy absorption performance, the blocking mechanism of the periodic structure, the local resonance of the phononic crystal, the impedance mismatch and the waveform conversion mechanism, and add a corrugated structure thereto. The added corrugated structure can effectively reduce the eccentric stiffness, so that it can not only absorb part of the vibration energy in three directions respectively, but also realize 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 produce impedance mismatch when passing through the corrugated structure, and waveform conversion will also occur, and it will be converted into a longitudinal wave that is not easy to propagate, further enhancing the energy absorption effect.

[0069] In addition, the corrugated honeycomb structure exhibits better tensile and compressive recoverability and energy absorption characteristics than traditional honeycomb structures, especially in the vertical direction, it ensures the initial stiffness of the isolator and the lateral stability during deformation, so that the structure has good high static stiffness and strong recoverability, can provide repetitive protection against vibration, and provide better durability than existing honeycombs.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-way corrugated honeycomb sound and vibration isolator, characterized in that: include: A plurality of negative Poisson's ratio cells (10), wherein the plurality of negative Poisson's ratio cells (10) are periodically arranged in the horizontal direction and the vertical direction in the same plane to form a three-dimensional honeycomb structure; In a direction perpendicular to the plane, the cell wall of the negative Poisson's ratio cell (10) presents a periodic corrugated structure.

2. The three-way corrugated honeycomb sound and vibration isolator according to claim 1, characterized in that: The cell wall of the negative Poisson's ratio cell (10) comprises: a pair of transverse cell walls (11) extending in the transverse direction and arranged alternately in the longitudinal direction, and a pair of longitudinal cell walls (12) extending in the longitudinal direction and arranged alternately in the transverse direction; The transverse cell wall (11) and the longitudinal cell wall (12) are connected in sequence to form a closed structure, and the longitudinal cell wall (12) is bent toward the inside of the negative Poisson's ratio cell (10).

3. The three-way corrugated honeycomb sound and vibration isolator according to claim 2, characterized in that: The longitudinal cell wall (12) comprises a pair of inclined plates (120), the opposite ends of the pair of inclined plates (120) are respectively connected to the pair of transverse cell walls (11), and the corresponding ends are inclined toward the inner side of the negative Poisson's ratio cell (10) and are connected.

4. The three-way corrugated honeycomb sound and vibration isolator according to claim 1, characterized in that: The three-dimensional honeycomb structure is integrally formed by using aluminum alloy material.

5. The three-way corrugated honeycomb sound and vibration isolator according to any one of claims 1 to 4, characterized in that: The cell wall of the negative Poisson's ratio cell (10) is provided with holes (13).

6. The three-way corrugated honeycomb sound and vibration isolator according to claim 5, characterized in that: The holes (13) are evenly distributed.

7. A design method for a three-way corrugated honeycomb sound and vibration isolator, characterized in that: The following steps are involved: Construct a natural frequency prediction model for vibration isolators; 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; A simulation check is carried out based on the predicted structural parameters, and when it is determined that the simulation results meet the requirements, the final structural parameters of the vibration isolator are obtained.

8. The design method of the three-way corrugated honeycomb sound and vibration isolator according to claim 7, characterized in that: The construction of the natural frequency prediction model of the vibration isolator includes: Determine several factors that affect the natural frequency of the vibration isolator; The effects of different level combinations of multiple influencing factors on the natural frequency of the vibration isolator are systematically evaluated through orthogonal experiments; Based on the orthogonal experimental results, the optimal horizontal combination scheme is determined, and the natural frequency prediction model of the vibration isolator is constructed based on it.

9. The design method of the three-way corrugated honeycomb sound and vibration isolator according to claim 8, characterized in that: The influencing factors include but are not limited to corrugation period, corrugation amplitude, structure wall thickness, negative Poisson's ratio structure side length, overall length, overall width, overall height, and weight of heavy objects.

10. The design method of the three-way corrugated honeycomb sound and vibration isolator according to claim 9, characterized in that: After obtaining the final structural parameters of the vibration isolator, the following steps are also included: the vibration isolator is manufactured based on the final structural parameters; wherein the honeycomb structure is made of aluminum alloy and is integrally formed using 3D printing technology, and after the honeycomb structure is formed, holes are drilled on its cell wall to finally form a three-way corrugated honeycomb sound insulation vibration isolator.

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