A connection damping and noise reduction method and device based on a vibration absorption superstructure

Abstract

The application discloses a connecting piece vibration reduction and noise reduction method and device based on a vibration absorption superstructure, which analyzes the vibration of the connecting piece between the vibration source and the remaining components in the vibration system, then carries out vibration reduction structure design according to requirements, embeds appropriate vibration absorption superstructures in the connecting piece, and makes the vibration absorption superstructure band gap interval cover the target vibration reduction rate. According to the configuration of the connecting piece connection, a metal rubber vibration isolation pad is designed and arranged to dissipate the vibration energy twice. Since the design method comprehensively evaluates the vibration direction, transmission path and vibration frequency, and uses customized vibration absorption superstructures for low-frequency vibration reduction, the efficient vibration suppression of actual equipment can be realized. The application has stronger practicability and vibration reduction and noise reduction capacity of engineering equipment, and can be applied to low-frequency broadband vibration reduction and noise reduction of mechanical equipment with connecting pieces between the cylinder equipment as a typical main system vibration source and other components.

Description

Technical Field

[0001] This invention belongs to the field of structural vibration reduction technology, specifically relating to a method and device for vibration reduction and noise reduction of connectors based on a vibration-absorbing superstructure. Background Technology

[0002] Elastic superstructures are an emerging type of functional composite structure in the field of low-frequency vibration reduction. Their unique subwavelength characteristics and high designability effectively meet the requirements of both low-frequency vibration reduction and lightweight design. Specifically, microstructures can be artificially designed to construct local resonant bandgap within a defined frequency range. The bandgap effect is then used to suppress elastic wave energy within this range, thereby achieving the vibration reduction effect of the superstructure.

[0003] Previous proposed superstructure vibration reduction schemes have often been primarily additive, involving directly attaching a designed vibration-absorbing superstructure to the target object. When vibration energy passes through, energy exchange occurs through the frame components of the superstructure, achieving a vibration reduction effect. However, in practical engineering problems, additive superstructures place high demands on the surface of the target object, its external space, and the surrounding environment. Furthermore, the additive structure often needs to reach a certain mass proportion to be effective. Therefore, additive vibration reduction structures are not suitable for all objects requiring vibration reduction, exhibiting limitations in their application. Thus, new vibration reduction methods are needed to achieve broadband vibration reduction effects. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing add-on vibration reduction technology. Taking the connection between the vibration source and other components in various vibration systems as the target object, it provides a method and device for vibration reduction and noise reduction of connection based on vibration-absorbing superstructure, which can be used for low-frequency broadband vibration reduction and noise reduction in various cylinder-type mechanical systems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for vibration reduction and noise reduction of connectors based on vibration-absorbing superstructures includes the following steps:

[0007] 1) Separate the main vibration source of the target vibration reduction object from the other components, arrange measuring points on the connection path between the two, i.e. the connector, and obtain the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction.

[0008] 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the allowable embedding space of the actual connectors;

[0009] 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range;

[0010] 4) If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap.

[0011] 5) Assemble the designed vibration-absorbing superstructure with the original connectors, and perform conformal matching design based on the installation conditions of the target vibration reduction object. Embed the vibration-absorbing superstructure into the connectors to form a superstructure embedded connector, thereby achieving structural integration and performing strength verification.

[0012] 6) Consider the connection configuration between the connector and other components of the target vibration reduction object, and design a metal rubber vibration isolation pad;

[0013] 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, conduct vibration tests, and verify the vibration reduction and noise reduction effect.

[0014] A further improvement of this invention is that the connection path between the main vibration source of the target vibration reduction object and other components, i.e., the connector, is designed as an integrated vibration reduction structure to achieve the best vibration reduction and noise reduction effect.

[0015] A further improvement of this invention is that it eliminates the need to attach or install any vibration damping devices outside the target vibration damping object.

[0016] A further improvement of the present invention is that the embedded vibration-absorbing superstructure achieves vibration energy attenuation on the transmission path through local resonance effect, the bandgap is a directional bandgap that can attenuate vibration in the main direction, or a complete bandgap, and the bandgap frequency range can cover the target vibration reduction frequency.

[0017] A further improvement of the present invention is that the superstructure embedded connector achieves energy isolation on the vibration transmission path by means of vibration absorption, which is a vibration reduction method that replaces isolation with absorption, and attenuates vibration noise induced by vibration.

[0018] A further improvement of this invention is that the embedded vibration-absorbing superstructure can be of any type and in any bandgap frequency range. By combining vibration-absorbing superstructures with different vibration reduction frequency ranges, and integrating embedded superstructure connectors, broadband vibrations can be absorbed.

[0019] A further improvement of this invention is that the vibration energy is reduced by embedding a vibration-absorbing superstructure and arranging metal rubber vibration isolation pads in the transmission path, achieving a two-stage synergistic vibration reduction effect. The vibration-absorbing superstructure absorbs the set frequency, and the vibration isolation pads attenuate in a specific direction.

[0020] A further improvement of the present invention is that the superstructure embedded connector includes a connector base, a fluororubber sealing ring, an embedded vibration-absorbing superstructure, and a sealing element; a deep groove is opened in the connector base, and the embedded vibration-absorbing superstructure is assembled with the fluororubber sealing ring and the sealing element.

[0021] A further improvement of the present invention is that the fluororubber sealing ring is assembled by an interference fit.

[0022] A vibration reduction and noise reduction device for connectors based on a vibration-absorbing superstructure includes the following steps:

[0023] The first confirmation module separates the main vibration source of the target vibration reduction object from the other components, arranges measuring points on the connection path between the two, i.e. the connector, and obtains the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction.

[0024] Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the space allowed for embedding of the actual connectors;

[0025] The second confirmation module, based on the selected type of vibration-absorbing superstructure, adjusts the structural parameters, calculates the dispersion curve of the vibration-absorbing superstructure, and determines the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range.

[0026] If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap.

[0027] The assembly module combines the designed vibration-absorbing superstructure with the original connectors. It performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connectors, forms a superstructure embedded connector, realizes structural integration, and performs strength verification.

[0028] The design module considers the connection configuration between the connector and other components of the target vibration reduction object, and designs metal rubber vibration isolation pads.

[0029] The testing module involves preparing ultrastructure embedded connectors and metal-rubber vibration isolation pads, connecting them to other components of the target vibration reduction object, and conducting vibration tests to verify the vibration reduction and noise reduction effects.

[0030] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0031] 1. By embedding vibration-absorbing superstructures into the main vibration connection components of the target vibration reduction system, a wide-band vibration reduction effect can be achieved, and vibration-induced noise can be reduced;

[0032] 2. Embedding a vibration-absorbing superstructure in the transmission component is equivalent to enhancing the damping energy dissipation capacity of the connector by utilizing the local resonance effect, thereby improving the vibration reduction capacity of the structure without compromising the strength of the connector.

[0033] 3. By integrating and combining embedded vibration-absorbing superstructures of different types and different bandgap frequency ranges, effective attenuation of multiple vibration peaks can be achieved;

[0034] 4. The arranged metal rubber vibration isolation pads can attenuate vibration energy in a specific direction (the direction perpendicular to the mounting plane);

[0035] 5. It can achieve an ultra-strong wideband vibration attenuation effect of more than 8dB and an efficient noise reduction effect of more than 5dB without increasing or even reducing the original structural mass.

[0036] In summary, based on the aforementioned features of the vibration reduction and noise reduction method for connectors based on a vibration-absorbing superstructure provided by the present invention, the low-frequency vibration reduction and noise reduction scheme provided by the present invention, applied to connectors between the main vibration source and other components of various vibration systems, can overcome the shortcomings of existing vibration reduction technologies. It localizes and dissipates energy and frictional losses along the main vibration transmission path, thereby achieving vibration suppression of the main system and further attenuating vibration-induced noise. Because this design method comprehensively evaluates the vibration direction, transmission path, and vibration frequency, and utilizes a customized vibration-absorbing superstructure for low-frequency vibration reduction, it can achieve highly efficient vibration suppression in actual equipment. The advantages of this device, in addition to its highly efficient vibration reduction effect, include effective attenuation of vibration noise, no need to damage the original system's external layout, no impact on the original system's structural strength, and the ability to solve the problem of multiple vibration peaks. The advantages of this method include: effective vibration noise attenuation, which reduces induced noise by effectively attenuating vibration energy; no disruption to the original system's external layout, as the vibration reduction scheme uses an embedded vibration-absorbing superstructure that does not alter the external spatial layout of the connectors; no impact on the original system's structural strength, as the strength of the connectors remains largely unchanged after embedding the vibration-absorbing superstructure, still meeting application requirements; and the ability to address multiple vibration peaks, as the embedded vibration-absorbing superstructure allows for gradient bandgap design and multi-specification superstructure integration. In summary, this vibration reduction and noise reduction method offers enhanced practicality for engineering equipment and superior vibration and noise reduction capabilities, making it suitable for low-frequency broadband vibration and noise reduction in various cylinder-type mechanical systems. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the initial connection between the actuator cylinder and other components of the main system.

[0038] Figure 2 A schematic diagram of an embedded double-helix slit-type vibration-absorbing superstructure;

[0039] Figure 3The dispersion curve of the gradient-type vibration-absorbing superstructure;

[0040] Figure 4 This is a schematic diagram of a superstructure embedded connector.

[0041] Figure 5 Stress distribution cloud diagrams of the connectors before and after embedding the vibration-absorbing superstructure;

[0042] Figure 6 Axial excitation transmission curves of the connectors before and after embedding the vibration-absorbing superstructure;

[0043] Figure 7 Radial excitation transmission curves of the connectors before and after embedding the vibration-absorbing superstructure;

[0044] Figure 8 This is a schematic diagram of a metal-rubber vibration isolation pad structure;

[0045] Figure 9 Test results of independent connectors before and after embedding the vibration-absorbing superstructure;

[0046] Figure 10 The results of the acceleration level test of the original actuator cylinder system before and after embedding the vibration-absorbing superstructure;

[0047] Figure 11 The test results of the sound pressure level of the original actuator cylinder system before and after embedding the vibration-absorbing superstructure;

[0048] Figure 12 The image shows the actual prototype of the superstructure embedded connector (left) and the metal rubber vibration isolation pad (right). Detailed Implementation

[0049] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0050] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0051] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0052] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0053] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0054] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0055] Example 1

[0056] This invention provides a method for vibration reduction and noise reduction of connectors based on vibration-absorbing superstructures, comprising the following steps:

[0057] 1) Separate the main vibration source of the target vibration reduction object from the other components, arrange measuring points on the connection path between the two, i.e. the connector, and obtain the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction.

[0058] 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the allowable embedding space of the actual connectors;

[0059] 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range;

[0060] 4) If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap.

[0061] 5) Assemble the designed vibration-absorbing superstructure with the original connectors, and perform conformal matching design based on the installation conditions of the target vibration reduction object. Embed the vibration-absorbing superstructure into the connectors to form a superstructure embedded connector, thereby achieving structural integration and performing strength verification.

[0062] 6) Consider the connection configuration between the connector and other components of the target vibration reduction object, and design a metal rubber vibration isolation pad;

[0063] 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, conduct vibration tests, and verify the vibration reduction and noise reduction effect.

[0064] In this embodiment, the connection path between the main vibration source of the target vibration reduction object and other components, i.e., the connector, is designed as an integrated vibration reduction structure to obtain the best vibration reduction and noise reduction effect.

[0065] In this embodiment, it is not necessary to add or install any vibration damping devices outside the target vibration damping object.

[0066] In this embodiment, the embedded vibration-absorbing superstructure achieves vibration energy attenuation on the transmission path through local resonance effect. The bandgap is a directional bandgap that can attenuate vibrations in the main direction, or a complete bandgap, and the bandgap frequency range can cover the target vibration reduction frequency.

[0067] In this embodiment, the superstructure embedded connector achieves energy isolation on the vibration transmission path by absorbing vibration, which is a vibration reduction method that replaces isolation with absorption, and attenuates vibration noise induced by vibration.

[0068] In this embodiment, the embedded vibration-absorbing superstructure can be of any type and in any bandgap frequency range. By combining vibration-absorbing superstructures with different vibration reduction frequency ranges, and integrating the superstructure embedded connectors, broadband vibrations can be absorbed.

[0069] In this embodiment, vibration energy is reduced by embedding a vibration-absorbing superstructure and arranging metal rubber vibration isolation pads in the transmission path, achieving a two-stage synergistic vibration reduction effect. The vibration-absorbing superstructure absorbs a set frequency, and the vibration isolation pads attenuate in a specific direction.

[0070] Example 2

[0071] This invention provides a vibration reduction and noise reduction device for connectors based on a vibration-absorbing superstructure, comprising:

[0072] The first confirmation module separates the main vibration source of the target vibration reduction object from the other components, arranges measuring points on the connection path between the two, i.e. the connector, and obtains the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction.

[0073] Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the space allowed for embedding of the actual connectors;

[0074] The second confirmation module, based on the selected type of vibration-absorbing superstructure, adjusts the structural parameters, calculates the dispersion curve of the vibration-absorbing superstructure, and determines the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range.

[0075] If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap.

[0076] The assembly module combines the designed vibration-absorbing superstructure with the original connectors. It performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connectors, forms a superstructure embedded connector, realizes structural integration, and performs strength verification.

[0077] The design module considers the connection configuration between the connector and other components of the target vibration reduction object, and designs metal rubber vibration isolation pads.

[0078] The testing module involves preparing ultrastructure embedded connectors and metal-rubber vibration isolation pads, connecting them to other components of the target vibration reduction object, and conducting vibration tests to verify the vibration reduction and noise reduction effects.

[0079] Example 3

[0080] (I) Structural Design of Ultrastructure Embedded Connectors

[0081] As an implementation case, the connection between a certain actuating cylinder and the system is selected as the target design object, such as... Figure 1 As shown, in actual equipment, the actuating cylinder connected to the upper end of the connector is the main vibration source of the system. Vibration energy is transmitted to other components of the system through the connector. Therefore, by designing the connector as the target, the vibration energy on other components of the system can be reduced through the structural vibration reduction design of the connector. Measuring points were arranged on the connector, and vibration tests were conducted to determine the target vibration reduction frequencies in the low-frequency range as 40Hz and 200Hz. Based on this, an embedded vibration-absorbing superstructure was constructed in the 30~300Hz frequency band.

[0082] Embedded vibration-absorbing superstructures can be of any type. In this case, a double-helix slit-type vibration-absorbing superstructure is selected as the type of embedded vibration-absorbing superstructure, such as... Figure 2 As shown. By adjusting the structural parameters, a series of gradient bandgap vibration-absorbing superstructures can be designed to fully cover the target vibration reduction frequency band. Specific performance dispersion curves are shown in the figure. Figure 3 As shown. During use, vibration-absorbing superstructures with bandgap gradient distributions can be used synergistically to achieve broadband vibration reduction through the bandgap superposition effect. Then, conformal matching design of the embedded vibration-absorbing superstructure and the connector substrate is required, specifically as follows... Figure 4As shown, the superstructure embedded connector is obtained, mainly comprising four parts: connector base 1, fluororubber sealing ring 2, embedded vibration-absorbing superstructure 3, and sealing element 4. A deep groove is cut into the connector base 1, and the embedded vibration-absorbing superstructure 3 is assembled with the fluororubber sealing ring 2 and sealing element 4. The fluororubber sealing ring 2 must be assembled using an interference fit.

[0083] After the design is completed, the embedded connectors of the superstructure need to undergo relevant strength checks to ensure the reliability and safety of the structural design. Using the commercial finite element software COMSOL, the calculated strength results are as follows: Figure 5 As shown, a and b represent the stress distribution of the original connector and the super-structured embedded connector, respectively. It can be seen that after "super-structuring," the concentrated stress of the connector is transferred to the surface of the seal, with a maximum stress of 182 MPa, which is 2.5 times the original maximum stress of 72.3 MPa, but still lower than the yield strength of the structural material (316 steel) of 220 MPa. Therefore, it can be concluded that the super-structured connector still meets the strength requirements and will not affect its actual use.

[0084] Vibration reduction simulation analysis was performed on the designed superstructure embedded connector. The axial and radial transmission curves are shown below. Figure 6 , 7 As shown, both radial and axial vibration energy were significantly attenuated. From a transmission perspective, axial transmission attenuated by an average of 23.4 dB within the 10-500 Hz vibration range, while radial transmission attenuated by an average of 18.1 dB. Compared to the original connector, the attenuation effect was improved by an average of 3.4 dB radially and 3.2 dB axially within the 10-500 Hz vibration frequency range, demonstrating a good vibration attenuation effect and illustrating the vibration reduction reliability of the superstructure embedded connector.

[0085] Finally, considering the geometric configuration of the connector at the joint, a metal-rubber vibration isolation pad 5 with corresponding structural features was designed, as detailed below. Figure 8 As shown. The metal rubber vibration isolation pad 5 mainly dissipates energy during transmission, especially the vertical vibration of the action surface, by molding a certain diameter wire into a specific shape and utilizing the friction and compression between the metal wires.

[0086] (II) Performance Verification of Ultrastructure Embedded Connectors

[0087] Performance tests were conducted on the embedded connectors of the superstructure. In this case, vibration tests were carried out under two operating conditions: one was a performance test on the independent connectors, and the other was a vibration test on the original actuator cylinder system.

[0088] The performance test results of the independent connectors are as follows: Figure 9 As shown, for axial excitation vibration, the experimental group achieves a more significant vibration reduction effect compared to the control group in the 20~140Hz range, with an average attenuation of about 2~3dB, and an attenuation effect of nearly 25dB near 35Hz; it also shows a very good vibration absorption effect in the axial vibration wide frequency range of 200~500Hz, with an average vibration attenuation effect of about 10dB. For radial vibration, since the attenuation capability of this type of thin plate vibration-absorbing superstructure is relatively ordinary, the attenuation effect is not as obvious as that of axial vibration, but it can still achieve an average attenuation effect of about 3dB, which is a good vibration reduction effect.

[0089] The original vibration test results of the moving cylinder system are as follows: Figure 10 , 11 As shown, the superstructure embedded connector provides excellent vibration reduction and noise reduction. For vibration acceleration signals, the average attenuation reaches 8.2 dB in the low-frequency broadband range of 10~500 Hz; for acoustic signals, the peak sound pressure level is attenuated by 5 dB, which fully demonstrates that the superstructure embedded connector provided by this invention can effectively reduce noise while achieving efficient vibration reduction.

[0090] Based on the above data, the technical effects that this invention can achieve are as follows:

[0091] 1. By embedding vibration-absorbing superstructures into the main vibration connection components of the target vibration reduction system, a wide-band vibration reduction effect can be achieved, and vibration-induced noise can be reduced;

[0092] 2. Embedding a vibration-absorbing superstructure in the transmission component is equivalent to enhancing the damping energy dissipation capacity of the connector by utilizing the local resonance effect, thereby improving the vibration reduction capacity of the structure without compromising the strength of the connector.

[0093] 3. By integrating and combining embedded vibration-absorbing superstructures of different types and different bandgap frequency ranges, effective attenuation of multiple vibration peaks can be achieved;

[0094] 4. The arranged metal rubber vibration isolation pads can attenuate vibration energy in a specific direction (the direction perpendicular to the mounting plane);

[0095] 5. It can achieve an ultra-strong wideband vibration attenuation effect of more than 8dB and an efficient noise reduction effect of more than 5dB without increasing or even reducing the original structural mass.

[0096] In summary, based on the aforementioned features of the vibration reduction and noise reduction method for connectors based on a vibration-absorbing superstructure provided by the present invention, the low-frequency vibration reduction and noise reduction scheme provided by the present invention, applied to connectors between the main vibration source and other components of various vibration systems, can overcome the shortcomings of existing vibration reduction technologies. It localizes and dissipates energy and frictional losses along the main vibration transmission path, thereby achieving vibration suppression of the main system and further attenuating vibration-induced noise. Because this design method comprehensively evaluates the vibration direction, transmission path, and vibration frequency, and utilizes a customized vibration-absorbing superstructure for low-frequency vibration reduction, it can achieve highly efficient vibration suppression in actual equipment. The advantages of this device, in addition to its highly efficient vibration reduction effect, include effective attenuation of vibration noise, no need to damage the original system's external layout, no impact on the original system's structural strength, and the ability to solve the problem of multiple vibration peaks. The advantages of this method include: effective vibration noise attenuation, which reduces induced noise by effectively attenuating vibration energy; no disruption to the original system's external layout, as the vibration reduction scheme uses an embedded vibration-absorbing superstructure that does not alter the external spatial layout of the connectors; no impact on the original system's structural strength, as the strength of the connectors remains largely unchanged after embedding the vibration-absorbing superstructure, still meeting application requirements; and the ability to address multiple vibration peaks, as the embedded vibration-absorbing superstructure allows for gradient bandgap design and multi-specification superstructure integration. In summary, this vibration reduction and noise reduction method offers enhanced practicality for engineering equipment and superior vibration and noise reduction capabilities, making it suitable for low-frequency broadband vibration and noise reduction in various cylinder-type mechanical systems.

[0097] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0098] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for vibration reduction and noise reduction of connectors based on vibration-absorbing superstructures, characterized in that, Includes the following steps: 1) Separate the main vibration source of the target vibration reduction object from the other components, arrange measuring points on the connection path between the two, i.e. the connector, and obtain the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction; 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the allowable embedding space of the actual connectors; 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range; 4) If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap. 5) Assemble the designed vibration-absorbing superstructure with the original connectors, and perform conformal matching design based on the installation conditions of the target vibration reduction object. Embed the vibration-absorbing superstructure into the connectors to form a superstructure embedded connector, thereby achieving structural integration and performing strength verification. 6) Consider the connection configuration between the connector and other components of the target vibration reduction object, and design a metal rubber vibration isolation pad; 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, conduct vibration tests, and verify the vibration reduction and noise reduction effect; The vibration reduction structure is integrated into the connection path between the main vibration source and other components of the target vibration reduction object to achieve the best vibration reduction and noise reduction effect. The embedded vibration-absorbing superstructure achieves vibration energy attenuation on the transmission path through local resonance effect. The bandgap is a directional bandgap that can attenuate vibrations in the main direction, or a complete bandgap, and the bandgap frequency range can cover the target vibration reduction frequency. The superstructure embedded connector achieves energy isolation along the vibration transmission path through vibration absorption, which is a vibration reduction method that replaces isolation with absorption, and attenuates vibration noise induced by vibration. Vibration energy is reduced by embedding a vibration-absorbing superstructure and arranging metal rubber vibration isolation pads in the transmission path, achieving a two-stage synergistic vibration reduction effect. The vibration-absorbing superstructure absorbs the set frequency, and the vibration isolation pads attenuate in a specific direction. The superstructure embedded connector includes a connector base (1), a fluororubber sealing ring (2), an embedded vibration-absorbing superstructure (3) and a sealing element (4); a deep groove is made in the connector base (1), and the embedded vibration-absorbing superstructure (3) is assembled with the fluororubber sealing ring (2) and the sealing element (4).

2. The method for vibration reduction and noise reduction of connectors based on a vibration-absorbing superstructure according to claim 1, characterized in that, No vibration damping devices need to be added or installed outside the target vibration damping object.

3. The method for vibration reduction and noise reduction of connectors based on a vibration-absorbing superstructure according to claim 1, characterized in that, The embedded vibration-absorbing superstructure can be of any type and in any bandgap frequency range. By combining vibration-absorbing superstructures with different vibration reduction frequency ranges and integrating embedded superstructure connectors, broadband vibrations can be absorbed.

4. The method for vibration reduction and noise reduction of connectors based on a vibration-absorbing superstructure according to claim 1, characterized in that, The fluororubber sealing ring (2) is assembled by interference fit.

5. A vibration reduction and noise reduction device for connectors based on a vibration-absorbing superstructure, characterized in that, The device is based on the vibration reduction and noise reduction method for connectors based on a vibration-absorbing superstructure as described in claim 1, comprising: The first confirmation module separates the main vibration source of the target vibration reduction object from the other components, arranges measuring points on the connection path between the two, i.e. the connector, and obtains the vibration acceleration response function at the connection point through vibration test to determine the peak frequency and main vibration direction of the target vibration reduction. Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the space allowed for embedding of the actual connectors; The second confirmation module, based on the selected type of vibration-absorbing superstructure, adjusts the structural parameters, calculates the dispersion curve of the vibration-absorbing superstructure, and determines the local resonance bandgap frequency range so that the target vibration reduction frequency falls within the bandgap range. If there are multiple target vibration reduction frequencies, construct vibration-absorbing superstructures with various parameter specifications to form a bandgap gradient vibration-absorbing superstructure, so that the target vibration reduction peaks are all covered by the designed bandgap. The assembly module combines the designed vibration-absorbing superstructure with the original connectors. It performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connectors, forms a superstructure embedded connector, realizes structural integration, and performs strength verification. The design module considers the connection configuration between the connector and other components of the target vibration reduction object, and designs metal rubber vibration isolation pads. The testing module involves preparing ultrastructure embedded connectors and metal-rubber vibration isolation pads, connecting them to other components of the target vibration reduction object, and conducting vibration tests to verify the vibration reduction and noise reduction effects.

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