Local resonance damping structure, application method and system

Abstract

The invention provides a local resonance damping structure and an application method and system. The local resonance damping structure comprises at least one local resonance assembly; the local resonance assembly comprises at least one elastic damping unit, a connecting frame arranged on the upper surface of the elastic damping unit and at least one damping vibrator unit arranged in the connecting frame. One end of the damping oscillator unit is connected to the inner side wall of the connecting frame; the inner side wall connected with one end of the damping oscillator unit is designed as a main connecting wall; the wall thickness and the width of the main connecting wall are both larger than those of other parts of the connecting frame. The lower surface of the connecting frame comprises a unit connecting surface at least connected with the elastic damping unit and an unoccupied surface. The spare surface is located on the lower surface of the main connecting wall, and part of the elastic damping unit extends to the two sides of the spare surface from the connecting surface. The control efficiency of low-frequency vibration can be improved, and the driving comfort of a user is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and more specifically, to a local resonance damping structure, an application method, and a system. Background Art

[0002] During the driving process of a car, various vibrations and noises will be generated due to the unevenness of the road surface and the input of the vehicle's powertrain, affecting the comfort of the vehicle.

[0003] Traditional vibration and noise reduction measures primarily enhance vehicle stability and quietness by adding suspension systems and sound insulation materials. However, these measures have limited effectiveness and increase vehicle weight and cost. Current approaches to suppressing interior noise primarily involve the use of elastically deformable sound-absorbing and sound-insulating materials, such as rubber and foam. However, these materials have relatively weak isolation capabilities for low-frequency vibrations and are susceptible to aging, resulting in decreased effectiveness over time. Another common vibration suppression method is the use of dynamic vibration absorbers, which can effectively reduce vibration. However, dynamic vibration absorbers only function within a narrow frequency band near the natural frequency and require very high precision. Furthermore, the stacking of dynamic vibration absorbers increases deployment complexity, thus limiting their practical application. Traditional materials and vibration suppression methods have limitations in addressing low-frequency noise in vehicles, necessitating the urgent need for more innovative and effective technical solutions to address this challenge. Summary of the Invention

[0004] The purpose of this application is to provide a local resonance damping structure, application method, and system that can improve the control efficiency of low-frequency vibrations, ensure the user's driving comfort, and enhance the driving experience. The specific solution is as follows:

[0005] A local resonance damping structure, comprising: at least one local resonance component; the local resonance component comprising: at least one elastic damping unit, a connecting frame arranged on the upper surface of the elastic damping unit, and at least one damping vibrator unit arranged inside the connecting frame;

[0006] One end of the damping vibrator unit is connected to the inner side wall of the connecting frame; the inner side wall connected to one end of the damping vibrator unit is designed as a main connecting wall; wherein the wall thickness and width of the main connecting wall are greater than the wall thickness and width of other parts of the connecting frame;

[0007] The lower surface of the connecting frame includes: a unit connecting surface connected to at least the elastic damping unit, and a spare surface;

[0008] The spare surface is located on the lower surface of the main connecting wall, and a portion of the elastic damping unit extends from the connecting surface to both sides of the spare surface.

[0009] The damping oscillator unit includes:

[0010] A vibrator cantilever with one end connected to the main connecting wall; the other end of the vibrator cantilever is arranged at an angle relative to the one end connected to the main connecting wall, so that the vibrator cantilever can vibrate up and down relative to the connecting frame; wherein the other end of the vibrator cantilever is connected to the damping vibrator part.

[0011] The damping vibrator part includes a first vibrator block; a mass balance block may be provided at the upper end of the first vibrator block.

[0012] The shape of the vibrator cantilever is at least one of a rod shape, a circular shape, and a vortex shape.

[0013] A method for applying a local resonance damping structure comprises the following steps:

[0014] S1: Based on the pre-confirmed in-vehicle noise space, obtain the problematic low-frequency range corresponding to the in-vehicle noise space;

[0015] S2: using the first simulation software to obtain the noise contribution area information of the vehicle and the equivalent mass and displacement response mapping relationship according to the excitation source information;

[0016] S3: Based on the mapping relationship between equivalent mass and displacement response, obtain the local resonance band gap corresponding to the low-frequency range of the problem;

[0017] S4: Based on the local resonance band gap, generating design information of the local resonance damping structure, wherein the design information at least includes: structural information and vibration transmission information of the local resonance damping structure.

[0018] Said S4 specifically includes:

[0019] Acquire vibration transfer information of the noise contribution area according to the local resonance band gap; wherein the vibration transfer information includes at least: response mode position information and path transfer position information;

[0020] determining an installation position of the local resonance damping structure according to the response modal position information and the path transmission position information;

[0021] According to the spatial range of the installation position, the structural information of the local resonance damping structure is adjusted; the structural information at least includes: structural size information and structural type information.

[0022] The S4 also includes:

[0023] The steps for verifying the application effectiveness of the local resonance damping structure include:

[0024] Obtaining a first sample of the local resonance damping structure according to the structural dimension information of the local resonance damping structure;

[0025] Complete the installation of the first sample on the vehicle based on the information transmitted by the vibration;

[0026] Apply effect tests and optimize the structural information of the local resonance damping structure based on the test results.

[0027] An application system of a local resonance damping structure, comprising:

[0028] A first acquisition module is configured to acquire a problematic low-frequency range corresponding to the in-vehicle noise space based on a pre-confirmed in-vehicle noise space;

[0029] a second acquisition module configured to acquire noise contribution area information of the vehicle and an equivalent mass and displacement response mapping relationship based on the excitation source information using the first simulation software;

[0030] A third acquisition module is configured to obtain a local resonance band gap corresponding to a low-frequency range of the problem based on an equivalent mass and a displacement response mapping relationship;

[0031] The building module is configured to generate design information of the local resonance damping structure based on the local resonance band gap, wherein the design information at least includes structural information and vibration transmission information of the local resonance damping structure.

[0032] A computer device comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method.

[0033] A computer-readable storage medium stores a computer program / instruction thereon, which implements the steps of the method when executed by a processor.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention provides a local resonance damping structure, application method, and system. By configuring local resonance components based on the noise space within a vehicle, the damping oscillator units within each component can resonate with specific low-frequency vibrations, dissipating the vibration energy into other forms such as heat, significantly suppressing vibrations at specific frequencies. The compact structural design of the local resonance components achieves efficient vibration reduction within a limited space, resolving the issue of low-frequency noise within the vehicle and ensuring driving comfort for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of the local resonance damping structure;

[0037] Figure 2 Schematic diagram of the principle of the local resonance damping structure;

[0038] Figure 3 It is a schematic diagram of the mapping relationship curve between equivalent mass and displacement response;

[0039] Figure 4 The figure is a schematic diagram of the arrangement of a local resonance damping structure of one example;

[0040] Figure 5 Schematic diagram of the propagation form of traveling waves and standing waves;

[0041] Figure 6 Schematic diagram of the arrangement of the local resonance damping structure for traveling waves and standing waves; Figure (a) is a schematic diagram of the arrangement in the traveling wave path, and Figure (b) is a schematic diagram of the arrangement at the antinode of the standing wave;

[0042] Figure 7 Schematic diagram of the excitation source position;

[0043] Figure 8 for Figure 7 NTF curve diagram of the mid-rear suspension installation point;

[0044] Figure 9 Schematic diagram of vibration transmission path for simulation analysis;

[0045] Figure 10 A schematic diagram of the relationship between the frequency and wave vector of a local resonance damping structure in one embodiment;

[0046] Figure 11 A comparison diagram of the noise effects of one embodiment at three rows of positions is shown;

[0047] Figure 12 A comparison diagram of the acceleration effect of one embodiment in the spare tire pool is shown.

[0048] In the picture:

[0049] 1. Local resonance component; 12. Connection frame; 120. Main connection wall; 121. Connection surface; 122. Free surface;

[0050] 13. Damping vibrator unit; 131. Vibrator cantilever; 132. Damping vibrator part; 1320. First vibrator block; 1321. Mass counterweight block. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of this application clearer, the following Figure 1-12 This application is further described in detail. Obviously, the embodiments described are only a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0053] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0055] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0056] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0057] It should be noted in particular that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0058] like Figure 1 As shown, a local resonance damping structure includes: at least one local resonance component 1; the local resonance component 1 includes: at least one elastic damping unit, a connecting frame 12 arranged on the upper surface of the elastic damping unit, and at least one damping vibrator unit 13 arranged inside the connecting frame 12;

[0059] One end of the damping vibrator unit 13 is connected to the inner side wall of the connecting frame 12; the inner side wall connected to one end of the damping vibrator unit 13 is designed as a main connecting wall 120; wherein the wall thickness and width of the main connecting wall 120 are greater than the wall thickness and width of other parts of the connecting frame 12; the upper surface of the main connecting wall 120 is flush with the upper surfaces of other parts of the connecting frame 12, and the lower surface has a height difference relative to the lower surfaces of other parts of the connecting frame 12;

[0060] The lower surface of the connecting frame 12 includes: a unit connecting surface 121 connected to at least the elastic damping unit, and a spare surface 122;

[0061] The spare surface 122 is located on the lower surface of the main connecting wall 120 , and a portion of the elastic damping unit extends from the connecting surface 121 to both sides of the spare surface 122 .

[0062] The local resonance assembly 1 is positioned along the vibration transmission path of the upper surface of the structure to be damped, thereby maximizing the efficiency of the local resonance assembly 1. Energy is more concentrated along the vibration transmission path, allowing the local resonance assembly 1 to more fully interact with the vibrations and dissipate the vibration energy more effectively.

[0063] The elastic damping unit can be connected to the upper surface of the structure to be damped, such as the vehicle body or chassis, by bonding. The elastic damping unit is made of elastic material, such as rubber, silicone, or asphalt damping material. The elastic damping unit can be made of materials with different damping ratios and designed with appropriate shapes and structures to adjust the damping performance of the local resonance component 1. In this example, the damping ratio of the elastic damping unit is in the range of 0.001-1, and its shape can be designed according to the shape of the vehicle chassis and body to provide sufficient support and cushioning.

[0064] Furthermore, the main connecting wall 120 is fixed to the structure to be damped by any one of welding, bonding, threaded connection, riveting, profile connection or interference connection.

[0065] The connecting frame 12 is used to support and secure the damping oscillator unit 13, maintaining it in a specific position and ensuring the stability of the entire local resonance assembly. Simultaneously, the connecting frame 12 is connected to the elastic damping unit, combining the damping oscillator unit 13 and the elastic damping unit to form a complete local resonance assembly.

[0066] Furthermore, by designing the thickness and width of the main connecting wall 120 of the connecting frame 12, the connection reliability and stability between the damping vibrator unit 13 and the connecting frame 12 are ensured; the more important design advantage is that by using the main connecting wall 120 as a "reinforced channel" for vibration transmission, the vibration transmitted from the elastic damping unit can be more effectively transmitted to the damping vibrator unit 13, and at the same time, the vibration can be screened and filtered to a certain extent, so that the vibration transmitted to the damping vibrator unit 13 is closer to its natural frequency, thereby more easily inducing resonance and improving the efficiency of energy absorption and dissipation.

[0067] Furthermore, the design of the spare surface 122 on the lower surface of the main connecting wall 120 expands the space for elastic deformation. Because portions of the elastic damping unit extend from the connecting surface 121 to both sides of the spare surface 122, the spare surface 122 provides additional deformation space for the elastic damping unit. When the elastic damping unit deforms due to vibration excitation, the portion extending to both sides of the spare surface 122 can expand and bend more freely, helping the elastic damping unit to more fully exert its elastic properties and better absorb and buffer vibration energy. At the same time, the presence of the spare surface 122 changes the local stiffness distribution of the elastic damping unit, thereby affecting the vibration mode of the entire resonant structure.

[0068] Furthermore, in the local resonance damping structure, the damping oscillator unit 13 includes:

[0069] A vibrator cantilever 131 has one end connected to the main connecting wall 120; the other end of the vibrator cantilever 131 is arranged upwardly and tilted relative to the end connected to the main connecting wall 120, so that the vibrator cantilever 131 can vibrate up and down relative to the connecting frame; wherein the other end of the vibrator cantilever 131 is connected to the damping vibrator part 132.

[0070] The damping vibrator part 132 can be made of metal material, alloy material, linear elastic material or non-metal material.

[0071] See Figure 2 As shown in the figure, when external vibration excitation is transmitted to the structure, the equivalent mass moves under the action of the excitation. Due to the existence of equivalent stiffness, the mass movement will be resisted by elastic force. When the external excitation frequency is close to the natural frequency of the structure (determined by the equivalent mass and equivalent stiffness), resonance will occur. At this time, the vibration amplitude of the equivalent mass increases significantly. During the vibration process, equivalent damping plays a key role. It converts the mechanical energy of vibration into other forms of energy such as heat energy, gradually reducing the vibration amplitude. For example, in the automobile suspension system, the vibration generated by the vehicle's bumpy driving is continuously consumed by the equivalent damping through this structure, reducing the shaking of the vehicle body and improving ride comfort and vehicle stability.

[0072] It can be understood that the upward tilt of the vibrator cantilever 131 allows it to vibrate up and down relative to the connecting frame, providing a specific vibration path and degree of freedom for the damping vibrator portion, ensuring that the damping vibrator portion can vibrate up and down within a certain spatial range, thereby effectively interacting with the vibration of the elastic damping unit. Furthermore, the length, stiffness and other characteristics of the vibrator cantilever 131 will affect the vibration frequency of the entire structure. By rationally designing the parameters of the vibrator cantilever 131, the natural frequency of the damping vibrator unit 13 can be matched with the external excitation frequency, thereby more easily inducing resonance and improving the structure's response to vibrations of specific frequencies.

[0073] When the structure vibrates, the damping oscillator, driven by the oscillator cantilever 131, vibrates up and down, converting vibration energy into heat and other forms of energy for dissipation, thereby achieving a damping and vibration reduction effect. Furthermore, the damping oscillator can change the resonant frequency range and damping effect of the entire local resonance damping structure, enabling it to better adapt to different vibration environments and vibration reduction requirements.

[0074] Furthermore, the shape of the vibrator cantilever 131 is at least one of a rod shape, a circular shape, and a vortex shape.

[0075] Furthermore, the damping vibrator part includes a first vibrator block 1320 ; a mass counterweight block 1321 may be provided at the upper end of the first vibrator block 1320 .

[0076] The mass counterweight 1321 allows for flexible adjustment of the total mass of the damping oscillator. Depending on the vibration environment and vibration reduction requirements, counterweights of varying masses can be selected to precisely adjust the structural vibration characteristics. In practical applications, this facilitates installation and replacement. For example, if the vibration environment of the equipment changes or new vibration reduction requirements arise, counterweights of varying masses can be easily replaced without redesigning and remanufacturing the entire damping oscillator, reducing costs and maintenance.

[0077] It can be understood that the local resonance damping structure provided by the present application, by setting up a local resonance component, the damping vibrator unit 13 in each component can generate a resonant response to vibrations of a specific frequency, converting the vibration energy into other forms of energy such as heat and dissipating it, and has a significant effect on suppressing vibrations of a specific frequency. In terms of structural design, the local resonance component adopts a compact layout to achieve efficient vibration reduction function within a limited space. For example, the design of the vibrator cantilever and the damping vibrator part can be optimized according to space requirements to adapt to different installation spaces, and is particularly suitable for equipment and structures with strict space size restrictions.

[0078] The design of the elastic damping unit can not only provide elastic support, but also consume vibration energy, and work together with the damping vibrator unit 13 to effectively suppress the vibration of the structure, reduce fatigue damage and loosening caused by vibration, and further improve the stability of the structure.

[0079] In another aspect, the present invention provides an application method of a local resonance damping structure, comprising the following steps:

[0080] S1: Based on the pre-confirmed in-vehicle noise space, obtain the problematic low-frequency range corresponding to the in-vehicle noise space;

[0081] S2: using the first simulation software to obtain the noise contribution area information of the vehicle and the equivalent mass and displacement response mapping relationship according to the excitation source information;

[0082] S3: Based on the mapping relationship between equivalent mass and displacement response, obtain the local resonance band gap corresponding to the low-frequency range of the problem;

[0083] S4: Based on the local resonance band gap, generating design information of the local resonance damping structure, wherein the design information at least includes: structural information and vibration transmission information of the local resonance damping structure.

[0084] It can be understood that the present application obtains the problematic low-frequency range causing the noise inside the vehicle by confirming the noise space inside the vehicle, such as the rear seat space.

[0085] For example, accelerometers are installed in key vehicle locations, such as the body, chassis, and engine compartment. Vibration in these locations can directly or indirectly cause interior noise. By monitoring the vibration acceleration in these locations, information related to interior noise can be indirectly obtained. Signal processing tools are used to analyze and process the collected vibration acceleration signals to obtain the amplitude distribution of vibration acceleration at different frequencies.

[0086] For example, Figure 7-8 As shown in the figure, a certain test vehicle has a low-frequency roaring sound problem in the rear seat. Through experiments and CAE simulation analysis, it is determined that the exhaust pipe vibration energy is transmitted to the spare tire well through the suspension installation point and the frame connection point, causing the vibration inside the car and resulting in the noise inside the car. Figure 7 When the excitation position is selected as the suspension installation point, the rear noise peaks at 57.9dBA at 41Hz; the main noise contribution area of the vehicle body is the spare tire well position. Figure 8 At this time, the rear NTF curve spare tire pool has a 41Hz vibration response.

[0087] like Figure 3 , the range of the local resonance band gap is w is the system circular frequency, w0 is the oscillator natural frequency, m is the added mass, and M is the structural mass. "System" represents the entire vibration system, including the elastic damping unit, the damping oscillator unit 13, and the vehicle body or chassis. For example, the local resonance band gap is 35-48 Hz. Based on this, design information for the local resonance damping structure is generated. This design information includes at least structural information and vibration transmission information of the local resonance damping structure. This allows for the installation and layout of the local resonance damping structure on the vehicle, improving the control efficiency of low-frequency vibrations and ensuring the actual vehicle application experience.

[0088] Said S4 specifically includes:

[0089] Acquire vibration transfer information of the noise contribution area according to the local resonance band gap; wherein the vibration transfer information includes at least: response mode position information and path transfer position information;

[0090] determining an installation position of the local resonance damping structure according to the response modal position information and the path transmission position information;

[0091] According to the spatial range of the installation position, the structural information of the local resonance damping structure is adjusted; the structural information at least includes: structural size information and structural type information.

[0092] For example, by using CAE simulation software, models of vehicle structure and local resonance damping structure are established, such as models of body, chassis, engine compartment, damping oscillator unit, elastic damping unit and other local resonance damping structure models;

[0093] Using simulation software to simulate the vehicle's vibration response under different excitations, the effectiveness of the local resonance damping structure in suppressing vibrations was analyzed. By adjusting the structural information and mapping the equivalent mass and displacement response, structural information and vibration transmission information that met the design requirements were obtained. Based on the simulation results, the structural information of the local resonance damping structure was extracted, and then the path transmission position information was used to complete the installation layout of the local resonance structure.

[0094] For example, Figure 9 As shown in the figure, through the test and CAE analysis results, it can be confirmed that the roar inside the prototype car is mainly caused by the vibration of the rear subframe transmitted to the spare tire basin, tailgate, rear door and rear fender and other structural parts.

[0095] Therefore, the path of the vibration information transmission is as follows:

[0096] 1) Rear suspension → rear subframe → spare tire basin;

[0097] 2) Rear axle → rear subframe → spare tire basin;

[0098] 3) Rear suspension → rear subframe → spare tire basin → tailgate;

[0099] 4) Rear axle → rear subframe → spare tire basin → tailgate;

[0100] 5) Rear suspension → rear subframe → spare tire basin → rear fender;

[0101] 6) Rear axle → rear subframe → spare tire basin → rear fender;

[0102] 7) Rear suspension → rear subframe → rear door;

[0103] 8) Rear axle → rear subframe → rear door;

[0104] Vibration testing equipment, such as accelerometers, measures the vibration amplitude at different locations along the traveling wave transmission path. Resonance damping structures are then installed in locations with the highest vibration amplitudes. For example, if testing reveals that the vibration amplitude in a particular area near the engine compartment on a vehicle's chassis traveling wave transmission path is significantly higher than in other locations, then this area is the preferred location for installing a resonance damping structure.

[0105] In this embodiment, combined with Figure 5-Figure 6 As shown, the response modal position information includes at least standing wave locations such as the spare tire basin, rear tailgate, side panels, and doors. Localized resonance damping structures can be placed near antinodes such as the spare tire basin, tailgate, rear fender, and rear door. The vibration transmission information includes the subframe and spare tire basin as traveling wave transmission paths. Localized resonance damping structures can be placed at locations along these paths, such as the rear subframe and spare tire basin.

[0106] like Figure 10 As shown in the figure, the local resonance damping structure is discretized into a finite number of elements using simulation software for numerical simulation. During the simulation, waves of varying frequencies are input to the structure, and the structural response is calculated. By analyzing the amplitude or energy changes in the output results, the frequency ranges within which wave propagation is suppressed are determined, thereby determining the local resonance band gap range.

[0107] Combine Figure 4 As shown, the S4 further includes:

[0108] The steps for verifying the application effectiveness of the local resonance damping structure include:

[0109] Obtaining a first sample of the local resonance damping structure according to the structural dimension information of the local resonance damping structure;

[0110] Complete the installation of the first sample on the vehicle based on the information transmitted by the vibration;

[0111] Apply effect tests and optimize the structural information of the local resonance damping structure based on the test results.

[0112] For example, Figure 11 and12 As shown, according to the above analysis, a local resonance damping structure sample was made; the sample was placed in the spare tire pool; the sound pressure sensor was placed in the third row, and the acceleration sensor was placed in the spare tire pool; the experimental test showed that the 40Hz noise in the three rows in the original state was 49.14dBA, and the 40Hz noise in the rear row after the local resonance damping structure was placed in the spare tire pool was 45.72dBA, and the noise was reduced by 3.42dBA; the 44Hz vibration amplitude in the original state was 0.24m / s 2 After the spare tire pool is equipped with a local resonance damping structure, the vibration amplitude is 0.10m / s 2 , the vibration amplitude decreased by 0.14m / s, the percentage decreased by 58.3%, and the test results reached the preset target.

[0113] On the other hand, the present application provides an application system of a local resonance damping structure, comprising:

[0114] A first acquisition module is configured to acquire a problematic low-frequency range corresponding to the in-vehicle noise space based on a pre-confirmed in-vehicle noise space;

[0115] a second acquisition module configured to acquire noise contribution area information of the vehicle and an equivalent mass and displacement response mapping relationship based on the excitation source information using the first simulation software;

[0116] A third acquisition module is configured to obtain a local resonance band gap corresponding to a low-frequency range of the problem based on an equivalent mass and a displacement response mapping relationship;

[0117] The building module is configured to generate design information of the local resonance damping structure based on the local resonance band gap, wherein the design information at least includes structural information and vibration transmission information of the local resonance damping structure.

[0118] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0119] On the other hand, the present application provides a computer device comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method.

[0120] On the other hand, the present application provides a computer-readable storage medium having a computer program / instruction stored thereon, which implements the steps of the method when the computer program / instruction is executed by a processor.

[0121] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A local resonance damping structure, characterized in that: include: at least one local resonance component (1); The local resonance component (1) comprises: at least one elastic damping unit, a connection frame (12) arranged on the upper surface of the elastic damping unit, and at least one damping vibrator unit (13) arranged inside the connection frame (12); One end of the damping vibrator unit (13) is connected to the inner side wall of the connecting frame (12); the inner side wall connected to one end of the damping vibrator unit (13) is designed as a main connecting wall (120); wherein the wall thickness and width of the main connecting wall (120) are greater than the wall thickness and width of other parts of the connecting frame (12); The lower surface of the connecting frame (12) includes: a unit connecting surface (121) connected to at least the elastic damping unit, and a spare surface (122); The spare surface 122 is located on the lower surface of the main connecting wall (120), and part of the elastic damping unit extends from the connecting surface (121) to both sides of the spare surface (122).

2. The local resonance damping structure according to claim 1, characterized in that: The damping oscillator unit (13) comprises: A vibrator cantilever (131) is connected to the main connecting wall (120) at one end; the other end of the vibrator cantilever (131) is arranged obliquely relative to the one end connected to the main connecting wall (120), so that the vibrator cantilever (131) can vibrate up and down relative to the connecting frame (12); wherein the other end of the vibrator cantilever (131) is connected to the damping vibrator part (132).

3. The local resonance damping structure according to claim 2, characterized in that: The damping vibrator part (132) includes a first vibrator block (1320); the upper end of the first vibrator block (1320) may be provided with a mass counterweight block (1321).

4. The local resonance damping structure according to claim 2 or 3, characterized in that: The shape of the vibrator cantilever (131) is at least one of a rod shape, a circular shape, and a vortex shape.

5. An application method of a local resonance damping structure, characterized in that: The following steps are involved: S1: Based on the pre-confirmed in-vehicle noise space, obtain the problematic low-frequency range corresponding to the in-vehicle noise space; S2: using the first simulation software to obtain the noise contribution area information of the vehicle and the equivalent mass and displacement response mapping relationship according to the excitation source information; S3: Based on the mapping relationship between equivalent mass and displacement response, obtain the local resonance band gap corresponding to the low-frequency range of the problem; S4: Based on the local resonance band gap, generating design information of the local resonance damping structure, wherein the design information at least includes: structural information and vibration transmission information of the local resonance damping structure.

6. The application method of the local resonance damping structure according to claim 5, characterized in that: Said S4 specifically includes: Acquire vibration transfer information of the noise contribution area according to the local resonance band gap; wherein the vibration transfer information includes at least: response mode position information and path transfer position information; determining an installation position of the local resonance damping structure according to the response modal position information and the path transmission position information; According to the spatial range of the installation position, the structural information of the local resonance damping structure is adjusted; the structural information at least includes: structural size information and structural type information.

7. The application method of the local resonance damping structure according to claim 5, characterized in that: The S4 also includes: The steps for verifying the application effectiveness of the local resonance damping structure include: Obtaining a first sample of the local resonance damping structure according to the structural dimension information of the local resonance damping structure; Complete the installation of the first sample on the vehicle based on the information transmitted by the vibration; Apply effect tests and optimize the structural information of the local resonance damping structure based on the test results.

8. An application system of a local resonance damping structure, characterized in that: include: A first acquisition module is configured to acquire a problematic low-frequency range corresponding to the in-vehicle noise space based on a pre-confirmed in-vehicle noise space; a second acquisition module configured to acquire noise contribution area information of the vehicle and an equivalent mass and displacement response mapping relationship based on the excitation source information using the first simulation software; A third acquisition module is configured to obtain a local resonance band gap corresponding to a low-frequency range of the problem based on an equivalent mass and a displacement response mapping relationship; The building module is configured to generate design information of the local resonance damping structure based on the local resonance band gap, wherein the design information at least includes structural information and vibration transmission information of the local resonance damping structure.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 5 to 7.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 5 to 7 are implemented.

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