Sound absorption device, sound absorption equipment, and method, device and equipment for determining parameters of sound absorption device

Abstract

The invention relates to a sound absorption device, sound absorption equipment, and a parameter determination method, device and equipment of the sound absorption device. The sound absorption device can comprise a plurality of honeycomb core superstructures; the honeycomb core superstructure can comprise a plurality of micro-perforated plate resonance components; the micro-perforated plate resonance assembly may comprise: a plurality of layers of resonance units arranged in a stacked manner; the resonance unit can comprise a cavity body and a micro-perforated plate arranged at the top of the cavity body; wherein the depths of the cavities in any two adjacent layers of resonance units are different, and the depths of the cavities in the same layer of resonance units of two adjacent micro-perforated plate resonance assemblies are different, so that the resonance frequencies of different resonance units are different, and resonance coupling exists between the different resonance units. According to the embodiment of the invention, the sound absorption frequency band bandwidth of the sound absorption device can be widened, so that the sound absorption device can realize broadband efficient sound absorption, and the sound absorption device can be suitable for various engineering applications.

Description

Technical Field

[0001] The present application relates to the field of acoustic technology, and in particular to a sound absorbing device, a sound absorbing equipment, a method for determining parameters of the sound absorbing device, a device and equipment. Background Art

[0002] With the advancement of science and technology and the enhancement of environmental awareness, the research and application of sound-absorbing materials and / or sound-absorbing structures are also developing. For example, new sound-absorbing materials and / or sound-absorbing structures will be applied in engineering fields such as new energy vehicles, rail transportation, aerospace, shipbuilding, and construction.

[0003] In the related technology, the micro-perforated plate sound-absorbing structure as an environmentally friendly and durable acoustic noise reduction structure has attracted more and more attention from engineers. By using specific materials to manufacture it, it can be applied to high temperature, high-speed flow fields and other occasions.

[0004] However, the sound absorption bandwidth of the micro-perforated plate sound absorption structure in the related art is usually only 3-5 octaves, and its sound absorption frequency band is narrow, making it difficult to cope with complex acoustic environments. Summary of the invention

[0005] In view of the above problems, the present application provides a sound absorbing device, a sound absorbing equipment, a method for determining parameters of the sound absorbing device, a device and an apparatus, which can solve the problem of a narrow sound absorption frequency band of a micro-perforated plate sound absorbing structure in the related art.

[0006] In a first aspect, the present application provides a sound absorbing device, the sound absorbing device comprising: a plurality of honeycomb core superstructures; the honeycomb core superstructures comprising a plurality of micro-perforated plate resonance components; the micro-perforated plate resonance components comprising: a stacked multi-layer resonance unit; the resonance unit comprising a cavity and a micro-perforated plate disposed on the top of the cavity;

[0007] The depths of the cavities in any two adjacent layers of resonance units in the micro-perforated plate resonance component are different, and the depths of the cavities in the same layer of resonance units in two adjacent micro-perforated plate resonance components are different.

[0008] In some embodiments, the micro-perforated plate resonance assembly includes: a first resonance unit and a second resonance unit arranged in a stacked manner;

[0009] The first resonance unit includes a first cavity and a first micro-perforated plate arranged on the top of the first cavity; the second resonance unit includes a second cavity and a second micro-perforated plate arranged on the top of the second cavity; the first cavity is located on the top of the second micro-perforated plate; the depth of the first cavity is different from the depth of the second cavity.

[0010] In some embodiments, the micro-perforated plates in the resonance units located in the same layer have the same perforation ratio.

[0011] In some embodiments, the perforation rates of the micro-perforated plates in the resonance units at different layers are different.

[0012] In some embodiments, the heights of different honeycomb core superstructures are the same.

[0013] In some embodiments, multiple cavities in a microperforated plate resonant assembly belong to the same honeycomb core structure.

[0014] In some embodiments, multiple cavities in multiple micro-perforated plate resonance assemblies in a honeycomb core superstructure belong to the same honeycomb core structure; wherein partitions are provided between different micro-perforated plate resonance assemblies.

[0015] In some embodiments, the honeycomb core superstructure includes any one of the following: a circular honeycomb core superstructure, a rectangular honeycomb core superstructure, a hexagonal honeycomb core superstructure, and a triangular honeycomb core superstructure.

[0016] In a second aspect, the present application provides a sound absorbing device, which includes the sound absorbing device as described in any one of the above-mentioned first aspects.

[0017] In a third aspect, the present application provides a method for determining parameters of a sound absorbing device, the sound absorbing device being any one of the sound absorbing devices in the first aspect above, the method comprising:

[0018] According to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device, a fitness function of the honeycomb core superstructure is constructed; wherein the target optimization variables of the fitness function include the vertical distance variable between the micro-perforated plates in any two adjacent layers of the resonance units in the micro-perforated plate resonance assembly, and the perforation rate variable of the micro-perforated plates in the resonance units of different layers;

[0019] Based on preset constraints, the fitness function of the honeycomb core superstructure is solved to obtain the target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters include the vertical distance between the microperforated plates in any two adjacent layers of resonance units in the microperforated plate resonance assembly, and the perforation rate of the microperforated plates in the resonance units of different layers; the vertical distance between the microperforated plates in the two adjacent layers of resonance units is the depth of the cavity in the top layer of the resonance units in the two adjacent layers of resonance units.

[0020] In some embodiments, according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device, a fitness function of the honeycomb core superstructure is constructed, including:

[0021] The sound absorption coefficient function of the honeycomb core superstructure is constructed according to the acoustic impedance of the honeycomb core superstructure;

[0022] The fitness function of the honeycomb core superstructure is constructed according to the sound absorption coefficient function of the honeycomb core superstructure.

[0023] In some embodiments, the preset constraints include a preset vertical distance constraint and a preset perforation rate constraint.

[0024] In some embodiments, the method further comprises:

[0025] determining the acoustic impedance of each microperforated plate resonant assembly in the honeycomb core superstructure;

[0026] The acoustic impedance of the honeycomb core superstructure is determined based on the acoustic impedance of each micro-perforated plate resonant assembly.

[0027] In some embodiments, determining the acoustic impedance of each microperforated plate resonant assembly in the honeycomb core superstructure includes:

[0028] For each micro-perforated plate resonant assembly, determining the acoustic impedance of each resonant unit in the micro-perforated plate resonant assembly;

[0029] The acoustic impedance of the micro-perforated plate resonance assembly is determined according to the acoustic impedance of each resonance unit.

[0030] In a third aspect, the present application provides a device for determining parameters of a sound absorbing device, the sound absorbing device being any one of the sound absorbing devices in the first aspect, the device for determining parameters comprising:

[0031] A construction module is used to construct a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device; wherein the target optimization variables of the fitness function include a vertical distance variable between micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and a perforation rate variable of micro-perforated plates in resonance units of different layers;

[0032] A solution module is used to solve the fitness function of the honeycomb core superstructure based on preset constraints to obtain target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters include the vertical distance between the micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and the perforation rate of the micro-perforated plates in the resonance units of different layers; the vertical distance between the micro-perforated plates in the two adjacent layers of resonance units is the depth of the cavity in the top resonance unit in the two adjacent layers of resonance units.

[0033] In a fourth aspect, the present application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the methods in the third aspect when executing the computer program.

[0034] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any one of the methods in the third aspect when the computer program is executed by a processor.

[0035] In a sixth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of any one of the methods in the third aspect above.

[0036] In the above-mentioned sound absorbing device, sound absorbing equipment, parameter determination method, device and equipment of the sound absorbing device, the sound absorbing device may include multiple honeycomb core superstructures; the honeycomb core superstructure may include multiple micro-perforated plate resonance components; the micro-perforated plate resonance components may include: a stacked multi-layer resonance unit; the resonance unit may include a cavity and a micro-perforated plate disposed on the top of the cavity; wherein the depth of the cavity in any two adjacent layers of the resonance unit is different, and the depth of the cavity in the resonance unit of the same layer of two adjacent micro-perforated plate resonance components is different, so that the resonance frequencies of different resonance units are different, and there will be resonance coupling between different resonance units. It can be seen that in the embodiment of the present application, through the resonance coupling between multiple resonance units in multiple honeycomb core superstructures, the sound absorption frequency bandwidth of the sound absorbing device can be widened, so that the sound absorbing device can achieve broadband and efficient sound absorption, so that the sound absorbing device can be suitable for a variety of engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A schematic diagram of the structure of a sound absorbing device provided in some embodiments of the present application;

[0039] Figure 2 A schematic diagram of a planar spreading structure of a honeycomb core superstructure provided in some embodiments of the present application;

[0040] Figure 3 A schematic diagram of a planar spreading structure of a micro-perforated plate resonance component provided in some embodiments of the present application;

[0041] Figure 4 An example diagram of a honeycomb core superstructure provided for some embodiments of the present application;

[0042] Figure 5 Schematic diagram of a planar spreading structure of a honeycomb core superstructure provided in some other embodiments of the present application;

[0043] Figure 6 A side view of a honeycomb core superstructure provided for some embodiments of the present application;

[0044] Figure 7 A three-dimensional diagram of a honeycomb core superstructure provided for some embodiments of the present application;

[0045] Figure 8 A schematic diagram of a micro-perforated plate of a top resonance unit provided in some embodiments of the present application;

[0046] Fig. 9 A schematic diagram of a micro-perforated plate of a bottom resonance unit provided in some embodiments of the present application;

[0047] Fig.10 A schematic flow chart of a method for determining parameters of a sound absorbing device provided in some embodiments of the present application;

[0048] Fig.11 A schematic flow chart of a method for constructing a fitness function of a honeycomb core superstructure provided in some embodiments of the present application;

[0049] Fig.12 A schematic flow chart of a method for determining parameters of a sound absorbing device provided in some other embodiments of the present application;

[0050] Fig.13 A schematic diagram of an equivalent circuit of a honeycomb core superstructure provided in some embodiments of the present application;

[0051] Fig.14 A schematic diagram of a sound absorption coefficient curve of a honeycomb core superstructure provided in some embodiments of the present application;

[0052] Fig.15 A schematic diagram of the structure of a device for determining parameters of a sound absorbing device in some embodiments of the present application;

[0053] Fig.16 This is a schematic diagram of the structure of a computer device in some embodiments of the present application. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the term "including" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0056] In some embodiments, Figure 1 A schematic diagram of the structure of the sound absorbing device provided in some embodiments of the present application, such as Figure 1As shown, the sound absorbing device of the embodiment of the present application may include a plurality of honeycomb core superstructures (or referred to as honeycomb core superunits) 10. The plurality of honeycomb core superstructures 10 in the sound absorbing device may be arranged in an array form to form a honeycomb sandwich structure (or referred to as an array honeycomb sound absorbing device). Exemplarily, the array form type may include but is not limited to any of the following: an equitriangular array, a square array, and a rectangular array.

[0057] For example, the honeycomb core superstructure 10 in the embodiment of the present application may include but is not limited to any of the following: a circular honeycomb core superstructure, a rectangular honeycomb core superstructure, a hexagonal honeycomb core superstructure, and a triangular honeycomb core superstructure. It should be understood that Figure 1 In the following embodiments of the present application, the honeycomb core superstructure 10 is illustrated as a circular honeycomb core superstructure.

[0058] In the embodiment of the present application, the heights of different honeycomb core superstructures 10 may be the same, which is beneficial to the quantitative production and space utilization of the honeycomb core superstructure 10 ; of course, the heights of different honeycomb core superstructures 10 may also be different.

[0059] The honeycomb core superstructure 10 in the embodiment of the present application may include a plurality of micro-perforated plate resonance components 101. Exemplarily, the honeycomb core superstructure 10 may include but is not limited to two micro-perforated plate resonance components 101, three micro-perforated plate resonance components 101, four micro-perforated plate resonance components 101, five micro-perforated plate resonance components 101, or six micro-perforated plate resonance components 101.

[0060] For ease of understanding, in the following embodiments of the present application, the honeycomb core superstructure 10 includes four micro-perforated plate resonance components 101 as an example to exemplarily introduce and illustrate the relevant contents of the honeycomb core superstructure 10 .

[0061] Figure 2 Schematic diagram of the planar spreading structure of the honeycomb core superstructure provided in some embodiments of the present application, such as Figure 2 As shown, the honeycomb core superstructure 10 of the embodiment of the present application may include four micro-perforated plate resonance components 101 .

[0062] The micro-perforated plate resonant component 101 of the embodiment of the present application may include a stacked multi-layer resonant unit 101A ( Figure 2 1A is shown as an example of a three-layer resonant unit 101A including a stacked arrangement).

[0063] The resonance unit 101A in the embodiment of the present application may include a cavity A1 and a micro-perforated plate A2 disposed on the top of the cavity A1. For example, the micro-perforated plate A2 in the embodiment of the present application may include but is not limited to a thin plate provided with micro-holes with a diameter of less than 1.5 mm.

[0064] It should be understood that, in order from bottom layer to top layer, the micro-perforated plate A2 of the resonance unit 101A of the bottom layer can serve as the bottom plate of the resonance unit 101A of the middle layer, and the micro-perforated plate A2 of the resonance unit 101A of the middle layer can serve as the bottom plate of the resonance unit 101A of the top layer.

[0065] It should be understood that a bottom plate may be provided at the bottom of the bottom resonance unit 101A in each micro-perforated plate resonance component 101 .

[0066] Exemplarily, the depths of the cavities A1 in any two adjacent layers of resonance units 101A in the micro-perforated plate resonance assembly in the embodiment of the present application are different, so that under other parameter constraints, the resonance frequencies of the resonance units 101A in different layers can be different and coupled. It should be understood that the two adjacent layers of resonance units involved in the embodiment of the present application may refer to the two adjacent layers of resonance units in the micro-perforated plate resonance assembly.

[0067] It should be understood that the vertical distance between the micro-perforated plates A2 in two adjacent layers of resonance units 101A is the depth of the cavity A1 in the top resonance unit in the two adjacent layers of resonance units 101A.

[0068] It should be noted that the depth of the cavity A1 in the bottom resonance unit 101A in the micro-perforated plate resonance component 101 may be the vertical distance between the micro-perforated plate A2 of the resonance unit 101A and the bottom plate of the resonance unit 101A.

[0069] Exemplarily, in the embodiment of the present application, the depths of the cavities A1 in the resonance units 101A of the same layer of two adjacent micro-perforated plate resonance components 101 are different, so that the resonance frequencies of different resonance units 101A of the same layer are different.

[0070] For example, the depths of the cavities A1 of the resonance units 101A of the same layer of different micro-perforated plate resonance components 101 in the embodiments of the present application are all different.

[0071] For another example, the depths of the cavities A1 of different resonance units 101A of different micro-perforated plate resonance components 101 in the embodiments of the present application are all different.

[0072] In the embodiment of the present application, since there is resonant coupling between the multilayer resonant units 101A in a single microperforated plate resonant component 101, there is also resonant coupling between different microperforated plate resonant components 101, thereby widening the sound absorption frequency range (or sound absorption frequency bandwidth, or simply sound absorption bandwidth) of the microperforated plate resonant component 101.

[0073] Furthermore, in the embodiment of the present application, the sound absorption bandwidth of the honeycomb core superstructure 10 and its array honeycomb sound absorbing device can be widened through the resonant coupling between the multiple resonant units 101A in the multiple honeycomb core superstructures 10, so that the sound absorbing device can achieve broadband and efficient sound absorption, so that the sound absorbing device can be suitable for a variety of engineering applications.

[0074] In summary, the sound absorbing device in the embodiment of the present application may include multiple honeycomb core superstructures; the honeycomb core superstructure may include multiple micro-perforated plate resonance components; the micro-perforated plate resonance components may include: multiple layers of resonance units stacked together; the resonance unit may include a cavity and a micro-perforated plate disposed on the top of the cavity; wherein the depths of the cavities in any two adjacent layers of resonance units are different, and the depths of the cavities in the resonance units of the same layer of two adjacent micro-perforated plate resonance components are different, so that the resonance frequencies of different resonance units are different, and there will be resonance coupling between different resonance units. It can be seen that in the embodiment of the present application, the sound absorption frequency bandwidth of the sound absorbing device can be widened through the resonance coupling between the multiple resonance units in the multiple honeycomb core superstructures, so that the sound absorbing device can achieve broadband and efficient sound absorption, so that the sound absorbing device can be suitable for a variety of engineering applications.

[0075] In some embodiments, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located on the same layer in the embodiments of the present application may be the same.

[0076] The perforation rate of the micro-perforated plate A2 involved in the embodiment of the present application may refer to the ratio of the opening area of ​​the micro-perforated plate A2 to the total area of ​​the micro-perforated plate A2.

[0077] In the embodiment of the present application, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located on the same layer in the multiple micro-perforated plate resonance assemblies 101 in the multiple honeycomb core superstructures 10 may be the same, so as to simplify the design of the honeycomb core superstructure 10 .

[0078] Of course, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located on the same layer in the embodiment of the present application may also be different.

[0079] In some embodiments, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located at different layers in the embodiments of the present application may be different.

[0080] In the embodiment of the present application, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located at different layers in the multiple micro-perforated plate resonance assemblies 101 in the multiple honeycomb core superstructures 10 may be different, so as to facilitate the coupling between the different resonance units 101A in the honeycomb core superstructure 10, thereby facilitating further widening the sound absorption frequency bandwidth of the honeycomb core superstructure 10.

[0081] Of course, the perforation rates of the micro-perforated plates A2 in the resonance units 101A located at different layers in the embodiment of the present application may also be the same.

[0082] In some embodiments, Figure 3 A schematic diagram of a planar spreading structure of a micro-perforated plate resonance component provided in some embodiments of the present application, such as Figure 3 As shown, the micro-perforated plate resonant component 101 of the embodiment of the present application may include a first resonant unit 101A1 (or referred to as the top resonant unit 101A) and a second resonant unit 101A2 (or referred to as the bottom resonant unit 101A) stacked. The first resonant unit 101A1 may include a first cavity A11 and a first micro-perforated plate A21 disposed on the top of the first cavity A11; the second resonant unit 101A2 may include a second cavity A12 and a second micro-perforated plate A22 disposed on the top of the second cavity A12; the first cavity A11 may be located on the top of the second micro-perforated plate A22, that is, the second micro-perforated plate A22 may serve as the bottom plate of the first resonant unit 101A1.

[0083] It should be understood that the vertical distance between the first microperforated plate A21 in the first resonance unit 101A1 and the second microperforated plate A22 in the second resonance unit 101A2 is also the depth of the first cavity A11 in the first resonance unit 101A1; the vertical distance between the second microperforated plate A22 in the second resonance unit 101A2 and the bottom plate of the second resonance unit 101A2 is also the depth of the second cavity A12 in the second resonance unit 101A2.

[0084] Exemplarily, in the embodiment of the present application, the depth of the first cavity A11 in the first resonance unit 101A1 is different from the depth of the second cavity A12 in the second resonance unit 101A2, so that the resonance frequencies of the first resonance unit 101A1 and the second resonance unit 101A2 can be different.

[0085] In addition, the depths of the first cavity A11 in the first resonance unit 101A1 of two adjacent microperforated plate resonance components 101 are different, and the depths of the second cavity A12 in the second resonance unit 101A2 of two adjacent microperforated plate resonance components 101 are different, so that the resonance frequencies of different resonance units in the same layer of two adjacent microperforated plate resonance components 101 can be different.

[0086] In summary, the micro-perforated plate resonant assembly in the embodiment of the present application may include a first resonant unit and a second resonant unit that are stacked, wherein the depth of the first cavity body is different from the depth of the second cavity body, so that the resonant frequencies of the first resonant unit and the second resonant unit are different, and there is resonant coupling between the first resonant unit and the second resonant unit. It can be seen that in the embodiment of the present application, the sound absorption frequency bandwidth of the micro-perforated plate resonant assembly can be widened by the resonant coupling between the first resonant unit and the second resonant unit, which is conducive to widening the sound absorption frequency bandwidth of the honeycomb core superstructure and the sound absorbing device including multiple micro-perforated plate resonant assemblies.

[0087] With the development of industry and its commercialization, higher requirements are put forward for the mechanical properties of micro-perforated plates. The existing micro-perforated plates cannot meet the requirements of mechanical properties (such as load-bearing and / or bending and torsion) in some specific occasions, which greatly limits the potential engineering application scenarios of the micro-perforated plate structure and hinders the promotion and engineering application of micro-perforated plates.

[0088] In some embodiments, the multiple cavities in the micro-perforated plate resonance assembly 101 in the embodiments of the present application belong to the same honeycomb core structure.

[0089] Considering that the composite honeycomb sandwich structure has been widely used in aerospace, rail transit, automobile and shipbuilding fields due to its excellent mechanical properties and lightweight characteristics, it is proposed in the embodiment of the present application that a micro-perforated plate structure can be combined with a honeycomb structure to improve the mechanical properties of the composite structure, so as to expand the engineering application scenarios of the composite structure.

[0090] The hollow cavities A1 in the multiple stacked resonance units 101A in the micro-perforated plate resonance component 101 in the embodiment of the present application may belong to the same honeycomb core structure, that is, in the embodiment of the present application, the micro-perforated plate resonance component 101 may be formed by arranging multiple micro-perforated plates A2 in the same honeycomb core structure.

[0091] It can be seen that in the embodiment of the present application, the multiple cavities in the micro-perforated plate resonance assembly belong to the same honeycomb core structure, which realizes the combination of the micro-perforated plate structure and the honeycomb structure with excellent mechanical properties, thereby improving the mechanical properties of the honeycomb core superstructure, so as to expand the engineering application scenarios of the honeycomb core superstructure.

[0092] In some embodiments, the multiple cavities in the multiple micro-perforated plate resonance components 101 in the honeycomb core superstructure 10 in the embodiments of the present application belong to the same honeycomb core structure; wherein partitions are provided between different micro-perforated plate resonance components.

[0093] The cavities A2 in the multiple resonant units 101A in the multiple micro-perforated plate resonant assemblies 101 in the honeycomb core superstructure 10 in the embodiment of the present application may all belong to the same honeycomb core structure, wherein a partition may be provided between any two adjacent micro-perforated plate resonant assemblies 101. That is, in the embodiment of the present application, the honeycomb core superstructure 10 may be formed by providing a partition and multiple micro-perforated plates A2 in the same honeycomb core structure.

[0094] It can be seen that in the embodiment of the present application, the multiple cavities in the multiple micro-perforated plate resonance components 101 in the honeycomb core superstructure 10 belong to the same honeycomb core structure, which not only realizes the combination of the micro-perforated plate structure with the honeycomb structure with excellent mechanical properties, but also improves the mechanical properties of the honeycomb core superstructure, so as to expand the engineering application scenarios of the honeycomb core superstructure, and can also make full use of the lightweight characteristics of the honeycomb core structure, which is conducive to the lightweight of the sound-absorbing device.

[0095] For ease of understanding, in the following embodiments of the present application, the design steps of the honeycomb core superstructure 10 are exemplarily introduced and explained by taking the honeycomb core superstructure 10 as a circular honeycomb core superstructure, the honeycomb core superstructure 10 includes four micro-perforated plate resonance components 101, and the micro-perforated plate resonance component 101 includes two layers of resonance units 101A stacked.

[0096] Figure 4 An example diagram of a honeycomb core superstructure provided in some embodiments of the present application, such as Figure 4 As shown, the design steps of the honeycomb core superstructure of the embodiment of the present application may include the following steps:

[0097] 1) Adding a partition plate 102 inside a single honeycomb core structure to equally divide the honeycomb core structure into n honeycomb core sub-units (in this embodiment, n is taken as 4 for illustrative description).

[0098] 2) Each honeycomb core unit is divided into two layers, an upper layer and an lower layer; wherein the heights of the upper layer and the lower layer of honeycomb core units in each honeycomb core unit are different, but the total heights of the two layers of honeycomb core units are the same.

[0099] 3) A micro-perforated plate A2 is fixedly installed on the top of the two layers of honeycomb core units, and a bottom plate is fixedly installed on the bottom of the lower honeycomb core unit to form a honeycomb core superstructure. The parameters of the micro-perforated plate A2 installed on the top of each upper honeycomb core unit are the same and are an integrated structure, and the parameters of the micro-perforated plate A2 installed on the top of each lower honeycomb core unit are the same and are a separate structure. Exemplarily, the parameters of the micro-perforated plate A2 may include but are not limited to the perforation rate and / or pore size of the micro-perforated plate A2.

[0100] It should be noted that the fixing method between any two components involved in the embodiments of the present application may include but is not limited to an adhesive fixing method or a card fixing method.

[0101] It should be understood that the honeycomb core unit with two layers of micro-perforated plates A2 is the above-mentioned micro-perforated plate resonance component 101, the upper honeycomb core unit with the micro-perforated plate A2 on the top is the top layer resonance unit 101A in the above-mentioned micro-perforated plate resonance component 101, and the lower honeycomb core unit with the micro-perforated plate A2 on the top is the bottom layer resonance unit 101A in the above-mentioned micro-perforated plate resonance component 101.

[0102] Figure 5 Schematic diagram of a planar spreading structure of a honeycomb core superstructure provided in some other embodiments of the present application, Figure 6 A side view of a honeycomb core superstructure provided for some embodiments of the present application, Figure 7 A three-dimensional diagram of a honeycomb core superstructure provided in some embodiments of the present application, such as Figure 5-Figure 7 As shown, the honeycomb core superstructure 10 may include four micro-perforated plate resonant assemblies 101, and each micro-perforated plate resonant assembly 101 may include two layers of resonant units 101A stacked up and down. Each resonant unit 101A may include a cavity A1 and a micro-perforated plate A2 disposed on the top of the cavity A1. The depths of the cavities A1 in two adjacent layers of resonant units 101A are different, and the depths of the cavities A1 in the resonant units 101A of the same layer of two adjacent micro-perforated plate resonant assemblies 101 are different, so that the resonant frequencies of different resonant units 101A are different, and there will be resonant coupling between different resonant units 101A, which is conducive to widening the bandwidth of the sound absorption frequency band of the honeycomb core superstructure.

[0103] Figure 8 A schematic diagram of a micro-perforated plate of a top resonance unit provided in some embodiments of the present application, Fig. 9 A schematic diagram of a micro-perforated plate of a bottom resonance unit provided in some embodiments of the present application, such as Figure 8 As shown, the micro-perforated plate A2 of the top resonance unit is an integrated structure; Fig. 9 As shown, the micro-perforated plates of the resonance units of the bottom layer are separate structures, but the parameters of the micro-perforated plates A2 can be the same, so as to simplify the design of the honeycomb core superstructure.

[0104] In some embodiments, the embodiments of the present application further provide a sound absorbing device, which may include but is not limited to a sound absorbing device; wherein, the relevant contents of the sound absorbing device can refer to the technical solution in the above-mentioned sound absorbing device embodiments of the present application, and its implementation principle and technical effect are similar, which will not be repeated here.

[0105] In some embodiments, Fig.10This is a flow chart of a method for determining parameters of a sound absorbing device provided in some embodiments of the present application. In the embodiments of the present application, the method is described by taking the application of the method to a computer device as an example.

[0106] like Fig.10 As shown, the method of the embodiment of the present application may include the following steps:

[0107] Step S1001, constructing a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device; wherein the target optimization variables of the fitness function may include a vertical distance variable between micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and a perforation rate variable of micro-perforated plates in resonance units of different layers.

[0108] In this step, the computer device can construct a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device. The fitness function can be the area integral of the sound absorption coefficient curve (or sound absorption performance curve) of the honeycomb core superstructure in the sound absorbing device within the target optimization frequency range.

[0109] The target optimization variables of the fitness function in the embodiment of the present application may include but are not limited to the vertical distance variable between the micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly in the honeycomb core superstructure, and the perforation rate variable of the micro-perforated plates in the resonance units of different layers.

[0110] It should be understood that the vertical distance between the micro-perforated plates in two adjacent layers of resonance units in the embodiment of the present application is the depth of the cavity in the top resonance unit in the two adjacent layers of resonance units; further, the depth of the cavity in the bottom resonance unit can be determined based on the height of the honeycomb core superstructure, the thickness of each micro-perforated plate and the vertical distance between the micro-perforated plates in two adjacent layers of resonance units.

[0111] In a possible implementation, the computer device may construct a sound absorption coefficient function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure, and construct a fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure. The variables of the sound absorption coefficient function of the honeycomb core superstructure may include but are not limited to the vertical distance variable between the micro-perforated plates in two adjacent layers of resonance units, and the perforation rate variable of the micro-perforated plates in the resonance units of different layers.

[0112] In another possible implementation, the computer device can input the acoustic impedance of the honeycomb core superstructure in the sound absorbing device into a preset fitness function construction model to obtain the fitness function of the honeycomb core superstructure output by the preset fitness function construction model; wherein the preset fitness function construction model may include but is not limited to a machine learning model.

[0113] Of course, the computer device can also construct the fitness function of the honeycomb core superstructure in other ways according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device.

[0114] Step S1002: Solve the fitness function of the honeycomb core superstructure based on preset constraints to obtain target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters may include the vertical distance between the micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and the perforation rate of the micro-perforated plates in the resonance units of different layers; the vertical distance between the micro-perforated plates in the two adjacent layers of resonance units may be the depth of the cavity in the top resonance unit in the two adjacent layers of resonance units.

[0115] Exemplarily, the preset constraints in the embodiments of the present application may include preset vertical distance constraints and preset perforation rate constraints. The preset vertical distance constraints may be used to indicate that the value of the vertical distance variable between the micro-perforated plates in any two adjacent layers of resonance units needs to be greater than or equal to the preset vertical distance lower limit threshold, and less than or equal to the preset vertical distance upper limit threshold; the preset perforation rate constraints may be used to indicate that the value of the perforation rate variable of the micro-perforated plates in the resonance units of different layers needs to be greater than or equal to the preset perforation rate lower limit threshold, and less than or equal to the preset perforation rate upper limit threshold.

[0116] For example, the preset vertical distance lower limit threshold may include but is not limited to zero, and the preset vertical distance upper limit threshold may include but is not limited to the difference between the height of the honeycomb core superstructure and the thickness of the micro-perforated plate in each resonance unit.

[0117] For another example, the preset lower threshold of the perforation rate may include but is not limited to 0.5%, and the preset upper threshold of the perforation rate may include but is not limited to 10%.

[0118] As another example, the preset constraints in the embodiments of the present application may also include other constraints, such as preset height constraints of the honeycomb core superstructure, preset thickness constraints of the micro-perforated plate, and / or preset aperture constraints of the micro-perforated plate.

[0119] It should be noted that the height of the honeycomb core superstructure may also be set to a preset height, the thickness of the micro-perforated plate may also be set to a preset thickness, and / or the aperture of the micro-perforated plate may also be set to a preset aperture.

[0120] In this step, the computer device can solve the fitness function of the honeycomb core superstructure based on the preset constraints to obtain the target optimization parameters corresponding to the target optimization variables that can meet the sound absorption performance requirements, so that the honeycomb core superstructure can be designed according to the optimized parameters. The target optimization parameters may include but are not limited to the vertical distance between the micro-perforated plates in any two adjacent layers of resonance units, and the perforation rate of the micro-perforated plates in the resonance units of different layers.

[0121] In a possible implementation, the computer device can solve the fitness function of the honeycomb core superstructure based on preset constraints and using a preset optimization algorithm to obtain target optimization parameters corresponding to the target optimization variables.

[0122] In this implementation, the computer device can solve the fitness function of the honeycomb core superstructure using a preset optimization algorithm based on preset constraints, and use the value corresponding to the target optimization variable that maximizes or minimizes the value of the fitness function as the optimized parameter. Exemplarily, the preset optimization algorithm may include but is not limited to a particle swarm algorithm or a genetic algorithm.

[0123] In another possible implementation, a computer device may input preset constraints and the fitness function of the honeycomb core superstructure into a preset solution processing model to obtain target optimization parameters corresponding to the target optimization variables output by the preset solution processing model; wherein the preset solution processing model may include but is not limited to a machine learning model.

[0124] Of course, based on the preset constraints, the computer device can also solve the fitness function of the honeycomb core superstructure in other ways to obtain the target optimization parameters corresponding to the target optimization variables.

[0125] In summary, in the embodiment of the present application, the target optimization parameters corresponding to the target optimization variables are obtained by constructing the fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device, and solving the fitness function of the honeycomb core superstructure based on the preset constraints; wherein the target optimization parameters include the vertical distance between the micro-perforated plates in any two adjacent layers of the resonance units in the micro-perforated plate resonance assembly, and the perforation rate of the micro-perforated plates in the resonance units of different layers. It can be seen that in the embodiment of the present application, since the fitness function constructed according to the acoustic impedance of the honeycomb core superstructure and the preset constraints are comprehensively considered in the parameter determination method of the embodiment of the present application, the target optimization parameters corresponding to the target optimization variables determined in the embodiment of the present application can meet the sound absorption performance requirements, so that the honeycomb core superstructure designed according to the target optimization parameters can meet the sound absorption performance requirements.

[0126] In some embodiments, Fig.11A schematic diagram of a process for constructing a fitness function of a honeycomb core superstructure provided in some embodiments of the present application, such as Fig.11 As shown, the embodiment of the present application provides an exemplary description of a possible implementation method of "constructing a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device" in the above step S1001. Fig.11 As shown, the above step S1001 may include the following steps:

[0127] Step S1001A: constructing a sound absorption coefficient function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure.

[0128] In this step, the computer device can determine the sound absorption coefficient of the honeycomb core superstructure when the sound wave is vertically incident based on the acoustic impedance structure of the honeycomb core superstructure; wherein the sound absorption coefficient of the honeycomb core superstructure may include but is not limited to the vertical distance parameter between the microperforated plates in two adjacent layers of resonance units in the microperforated plate resonance assembly and the perforation rate parameter of the microperforated plates in the resonance units of different layers.

[0129] Exemplarily, the computer device may determine the sound absorption coefficient of the honeycomb core superstructure using the following formula (1) according to the acoustic impedance structure of the honeycomb core superstructure.

[0130]

[0131] Among them, Z T otal represents the acoustic impedance of the honeycomb core superstructure; Re(Z Total ) represents the acoustic impedance structure of the honeycomb core superstructure Total The real part of Im(Z Total ) represents the acoustic impedance structure of the honeycomb core superstructure Total The imaginary part of .

[0132] Of course, the computer device can also use other variations of the above formula (1) or equivalent formulas to determine the sound absorption coefficient of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure.

[0133] Furthermore, the computer device may construct a sound absorption coefficient function of the honeycomb core superstructure according to the sound absorption coefficient of the honeycomb core superstructure.

[0134] For example, considering that the depth of the cavity in the resonance unit in the honeycomb core superstructure has a significant influence on the sound absorption frequency of the honeycomb core superstructure, the computer device can use the vertical distance parameter between the micro-perforated plates in two adjacent layers of the resonance unit in the sound absorption coefficient of the honeycomb core superstructure as one of the optimization variables to construct the sound absorption coefficient function of the honeycomb core superstructure.

[0135] For example, in the case where the honeycomb core superstructure includes four microperforated plate resonance components, each microperforated plate resonance component includes two layers of resonance units stacked, the vertical distance parameter Dt between the microperforated plates in two adjacent layers of resonance units in the microperforated plate resonance component may include Dt_1, Dt_2, Dt_3, and Dt_4. Among them, Dt_1 represents the vertical distance parameter between the microperforated plates in two adjacent layers of resonance units in the first microperforated plate resonance component; Dt_2 represents the vertical distance parameter between the microperforated plates in two adjacent layers of resonance units in the second microperforated plate resonance component; Dt_3 represents the vertical distance parameter between the microperforated plates in two adjacent layers of resonance units in the third microperforated plate resonance component; and Dt_4 represents the vertical distance parameter between the microperforated plates in two adjacent layers of resonance units in the fourth microperforated plate resonance component.

[0136] In addition, considering that the perforation rate of the micro-perforated plate in the honeycomb core superstructure has a more significant impact on the sound absorption performance of the honeycomb core superstructure than the parameters of other micro-perforated plates, the computer equipment can use the perforation rate parameters of the micro-perforated plates in the resonance units of different layers as one of the optimization variables to construct the sound absorption coefficient function of the honeycomb core superstructure.

[0137] For example, in the case where each microperforated plate resonance component includes two layers of stacked resonance units, the perforation rate parameters of the microperforated plates in the resonance units of different layers may include σt and σb. Among them, σt represents the perforation rate parameter of the microperforated plate in the resonance unit of the top layer; σb represents the perforation rate parameter of the microperforated plate in the resonance unit of the bottom layer. It should be noted that since the microperforated plate of the resonance unit of the top layer in the honeycomb core superstructure is an integrated structure, the perforation rate parameters of the microperforated plates in the resonance units of the top layer in multiple microperforated plate resonance components are the same parameter; since the microperforated plate of the resonance unit of the bottom layer in the honeycomb core superstructure is a separated structure, but in order to simplify the equipment, the parameters of the microperforated plates can be the same, therefore, the perforation rate parameters of the microperforated plates in the resonance units of the bottom layer in multiple microperforated plate resonance components are the same parameter.

[0138] Step S1001B: constructing a fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure.

[0139] In this step, the computer device may construct a fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure and the target optimization frequency range.

[0140] Exemplarily, the computer device may construct the fitness function of the honeycomb core superstructure using the following formula (2) according to the sound absorption coefficient function of the honeycomb core superstructure and the target optimization frequency range.

[0141]

[0142] Where fitness represents the fitness function of the honeycomb core superstructure; fmax represents the upper limit frequency of the target optimization frequency range; fmin represents the lower limit frequency of the target optimization frequency range; ftarget represents the target optimization frequency range; α(f target ,σ t ,σ b ,D t... ) represents the sound absorption coefficient function of the honeycomb core superstructure under the target optimization frequency range and structural parameters (including constants and variables).

[0143] Of course, the computer device can also use other variations or equivalent formulas of the above formula (2) to construct the fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure and the target optimization frequency range. Exemplarily, the computer device can also use the following variation formula of the above formula (2) to construct the fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure and the target optimization frequency range:

[0144] Wherein, C represents a preset coefficient. For example, C may include but is not limited to 1.

[0145] In summary, in the embodiments of the present application, a sound absorption coefficient function of a honeycomb core superstructure is constructed according to the acoustic impedance of the honeycomb core superstructure, and a fitness function of the honeycomb core superstructure is constructed according to the sound absorption coefficient function of the honeycomb core superstructure, so that the fitness function of the honeycomb core superstructure can be solved for the maximum value (maximum value or minimum value) based on preset constraints, and the target optimization parameters corresponding to the target optimization variables that can meet the sound absorption performance requirements can be obtained.

[0146] It should be understood that when the fitness function of the honeycomb core superstructure adopts the above formula (2), the fitness function of the honeycomb core superstructure can be solved for the maximum value based on the preset constraints; when the fitness function of the honeycomb core superstructure adopts the above-mentioned modified formula of the above formula (2), the fitness function of the honeycomb core superstructure can be solved for the minimum value based on the preset constraints.

[0147] In some embodiments, Fig.12 This is a flow chart of a method for determining parameters of a sound absorbing device provided in some other embodiments of the present application. The embodiments of the present application provide an exemplary introduction to the relevant contents on how to determine the acoustic impedance of the honeycomb core superstructure. Fig.12 As shown, the method of the embodiment of the present application may also include the following steps:

[0148] Step S1201: determining the acoustic impedance of each micro-perforated plate resonance assembly in the honeycomb core superstructure.

[0149] In this step, the computer device may determine the acoustic impedance of each micro-perforated plate resonance assembly in the honeycomb core superstructure according to the acoustic impedance of each resonance unit in each micro-perforated plate resonance assembly.

[0150] Exemplarily, for each micro-perforated plate resonant assembly, the acoustic impedance of each resonant unit in the micro-perforated plate resonant assembly may be determined, and the acoustic impedance of the micro-perforated plate resonant assembly may be determined based on the acoustic impedance of each resonant unit.

[0151] For ease of understanding, in the following embodiments of the present application, a honeycomb core superstructure including n micro-perforated plate resonance components, and each micro-perforated plate resonance component including two layers of stacked resonance units is taken as an example to exemplarily introduce and explain how to determine the acoustic impedance of each micro-perforated plate resonance component in the honeycomb core superstructure in the above step S1201.

[0152] Fig.13 A schematic diagram of an equivalent circuit of a honeycomb core superstructure provided in some embodiments of the present application, such as Fig.13 As shown, Represents the impedance of the microperforated plate in the i-th layer resonance unit in the q-th microperforated plate resonance component, where q can be 1 to n and i can be 1 to 2. represents the impedance of the cavity in the i-th layer resonant unit in the q-th microperforated plate resonant component; ρ represents the density of the medium; c0 represents the sound velocity; and p represents the sound pressure.

[0153] In the embodiment of the present application, for each resonance unit in the micro-perforated plate resonance assembly, the computer device can determine the acoustic impedance of the resonance unit based on the impedance of the micro-perforated plate in the resonance unit and the impedance of the cavity.

[0154] Exemplarily, the computer device may determine the acoustic impedance of the resonance unit using the following formula (3) based on the impedance of the micro-perforated plate and the impedance of the cavity in the resonance unit.

[0155] ZSL=Zmpp+ZD Formula (3)

[0156] Among them, Z SL Represents the acoustic impedance of the resonant unit; Z mpp Represents the impedance of the micro-perforated plate in the resonant unit; Z D Represents the impedance of the cavity in the resonant unit.

[0157] The impedance Z of the micro-perforated plate in the resonant unit is mpp It can be expressed as the following formula (4):

[0158]

[0159] Wherein, σ represents the perforation rate of the microperforated plate; c represents the speed of sound in air (343 m / s); d represents the pore size of the microperforated plate; μ represents the kinematic viscosity coefficient of air; t represents the thickness of the microperforated plate; k represents the microperforated plate constant ω represents the angular frequency.

[0160] Of course, the impedance Zmpp of the micro-perforated plate in the resonance unit can also be expressed as other variations or equivalent formulas of the above formula (4).

[0161] Among them, the impedance Z of the cavity in the resonant unit D It can be expressed as the following formula (5):

[0162] Z D =-cot(ωD / c) Formula (5)

[0163] Wherein, D represents the depth of the cavity in the resonance unit.

[0164] Of course, the impedance Z of the cavity in the resonant unit D It can also be expressed as other variations or equivalent formulas of the above formula (5).

[0165] Of course, the computer device can also use other variations or equivalent formulas of the above formula (3) to determine the acoustic impedance of the resonance unit according to the impedance of the micro-perforated plate and the impedance of the cavity in the resonance unit.

[0166] Furthermore, the computer device can determine the acoustic impedance of the micro-perforated plate resonance assembly using the following formula (6) according to the acoustic impedance of each resonance unit.

[0167]

[0168] Among them, Z DL Represents the acoustic impedance of the micro-perforated plate resonant component composed of double-layer resonant units; represents the impedance of the micro-perforated plate in the first layer of resonant unit; Represents the impedance of the cavity in the first layer of resonant unit; Represents the acoustic impedance of the second layer resonant unit.

[0169] Of course, the computer device can also use other variations of the above formula (6) or equivalent formulas to determine the acoustic impedance of the micro-perforated plate resonance assembly according to the acoustic impedance of each resonance unit.

[0170] Step S1202: Determine the acoustic impedance of the honeycomb core superstructure according to the acoustic impedance of each micro-perforated plate resonance assembly.

[0171] Exemplarily, the computer device may determine the acoustic impedance of the honeycomb core superstructure using the following formula (7) based on the acoustic impedance of each micro-perforated plate resonant assembly.

[0172]

[0173] Among them, Z T otal represents the acoustic impedance of the honeycomb core superstructure; aq represents the ratio of the perforated panel area of ​​the qth micro-perforated plate resonance component to the overall panel area of ​​the micro-perforated plate resonance component.

[0174] Of course, the computer device can also use other variations of the above formula (7) or equivalent formulas to determine the acoustic impedance of the honeycomb core superstructure according to the acoustic impedance of each micro-perforated plate resonant component.

[0175] In summary, in the embodiments of the present application, the acoustic impedance of each micro-perforated plate resonant assembly in the honeycomb core superstructure is determined, and the acoustic impedance of the honeycomb core superstructure is determined according to the acoustic impedance of each micro-perforated plate resonant assembly, so as to construct a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure, and obtain the target optimization parameters that can meet the broadband sound absorption performance requirements corresponding to the target optimization variables by solving the fitness function of the honeycomb core superstructure based on preset constraints.

[0176] In some embodiments, the following embodiments of the present application take a honeycomb core superstructure including four micro-perforated plate resonance components, and each micro-perforated plate resonance component including two layers of resonance units stacked as an example to exemplarily introduce and illustrate the target optimization parameters of the honeycomb core superstructure and the related contents of the designed honeycomb core superstructure.

[0177] When the height of the honeycomb core superstructure is 67 mm, the parameters of the micro-perforated plates in the upper resonance unit and the lower resonance unit may include: thickness of 0.5 mm, aperture of 0.5 mm, and the thickness of the bottom plate in the lower resonance unit is 1 mm, the target optimization parameters of the honeycomb core superstructure obtained by the parameter determination method of the sound absorbing device provided in the embodiment of the present application may include: the vertical distances between the micro-perforated plates in the upper and lower resonance units of the four micro-perforated plate resonance assemblies are 42 mm, 24.5 mm, 14 mm, and 9 mm, respectively, and the perforation rate of the micro-perforated plate in the upper resonance unit is 6.8%, and the perforation rate of the micro-perforated plate in the lower resonance unit is 0.96%.

[0178] Fig.14 Schematic diagram of the sound absorption coefficient curve of the honeycomb core superstructure provided in some embodiments of the present application, such as Fig.14 As shown, the sound absorption coefficient curve of the honeycomb core superstructure designed according to the target optimization parameters can be used to indicate that the honeycomb core superstructure can achieve broadband and efficient sound absorption.

[0179] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0180] Based on the same inventive concept, the embodiment of the present application also provides a device for determining parameters of a sound absorbing device for implementing the method for determining parameters of a sound absorbing device involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific definition of the embodiments of the device for determining parameters of one or more sound absorbing devices provided below can refer to the definition of the method for determining parameters of a sound absorbing device above, and will not be repeated here.

[0181] In some embodiments, Fig.15 This is a schematic diagram of the structure of the device for determining the parameters of the sound absorbing device in some embodiments of the present application. The device for determining the parameters of the sound absorbing device provided in the embodiments of the present application can be applied to computer equipment; the relevant contents of the sound absorbing device can refer to the relevant contents in the above-mentioned embodiments of the sound absorbing device of the present application, and will not be repeated here. Fig.15 As shown, the device for determining parameters of a sound absorbing device in the embodiment of the present application may include: a construction module 1501 and a solution module 1502 .

[0182] The construction module 1501 is used to construct a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device; wherein the target optimization variables of the fitness function include the vertical distance variable between the micro-perforated plates in any two adjacent layers of the resonance units, and the perforation rate variable of the micro-perforated plates in the resonance units of different layers;

[0183] The solution module 1502 is used to solve the fitness function of the honeycomb core superstructure based on preset constraints to obtain target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters include the vertical distance between the micro-perforated plates in any two adjacent layers of resonance units, and the perforation rate of the micro-perforated plates in the resonance units of different layers; the vertical distance between the micro-perforated plates in the resonance units of two adjacent layers is the depth of the cavity in the top resonance unit of the two adjacent layers of resonance units.

[0184] In some embodiments, building blocks 1501 may include:

[0185] A first construction unit is used to construct a sound absorption coefficient function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure;

[0186] The second construction unit is used to construct a fitness function of the honeycomb core superstructure according to the sound absorption coefficient function of the honeycomb core superstructure.

[0187] In some embodiments, the preset constraints include a preset vertical distance constraint and a preset perforation rate constraint.

[0188] In some embodiments, the parameter determination device of the sound absorbing device of the embodiment of the present application may further include:

[0189] A first determination module is used to determine the acoustic impedance of each micro-perforated plate resonant assembly in the honeycomb core superstructure;

[0190] The second determination module is used to determine the acoustic impedance of the honeycomb core superstructure according to the acoustic impedance of each micro-perforated plate resonance assembly.

[0191] In some embodiments, the first determining module is specifically configured to:

[0192] For each micro-perforated plate resonant assembly, determining the acoustic impedance of each resonant unit in the micro-perforated plate resonant assembly;

[0193] The acoustic impedance of the micro-perforated plate resonance assembly is determined according to the acoustic impedance of each resonance unit.

[0194] The device for determining parameters of a sound absorbing device provided in the embodiment of the present application can be used to execute the technical solution in the embodiment of the method for determining parameters of a sound absorbing device described above. The implementation principle and technical effect are similar and will not be described in detail here.

[0195] Each module in the above-mentioned device for determining parameters of a sound absorbing device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0196] In some embodiments, Fig.16 This is a schematic diagram of the structure of a computer device in some embodiments of the present application, such as Fig.16As shown, the computer device provided in the embodiment of the present application may include a processor, a memory and a communication interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with external devices in a wired or wireless manner. When the computer program is executed by the processor, the technical solution in the embodiment of the parameter determination method of the sound absorbing device of the present application is implemented. The implementation principle and technical effect are similar and will not be repeated here.

[0197] Those skilled in the art will understand that Fig.16 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0198] In some embodiments, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the technical solution in the embodiment of the method for determining parameters of the sound absorbing device of the present application is implemented. The implementation principle and technical effect are similar and will not be repeated here.

[0199] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the technical solution in the above-mentioned method for determining parameters of the sound absorbing device of the present application is implemented. The implementation principle and technical effect are similar and will not be repeated here.

[0200] In some embodiments, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the technical solution in the above-mentioned method for determining parameters of the sound absorbing device of the present application is implemented. The implementation principle and technical effect are similar and will not be repeated here.

[0201] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The processor involved in each embodiment provided in this application can be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, etc., but is not limited thereto.

[0202] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A sound absorbing device, characterized in that: The sound absorbing device comprises: a plurality of honeycomb core superstructures; the honeycomb core superstructure comprises a plurality of micro-perforated plate resonance components; the micro-perforated plate resonance components comprise: a stacked multi-layer resonance unit; the resonance unit comprises a cavity and a micro-perforated plate disposed on the top of the cavity; The depths of the cavities in any two adjacent layers of resonance units in the micro-perforated plate resonance component are different, and the depths of the cavities in the same layer of resonance units in two adjacent micro-perforated plate resonance components are different.

2. The sound absorbing device according to claim 1, characterized in that: The micro-perforated plate resonance component comprises: a first resonance unit and a second resonance unit which are stacked; Wherein, the first resonance unit includes a first cavity and a first micro-perforated plate arranged on the top of the first cavity; the second resonance unit includes a second cavity and a second micro-perforated plate arranged on the top of the second cavity; the first cavity is located on the top of the second micro-perforated plate; wherein the depth of the first cavity is different from the depth of the second cavity.

3. The sound absorbing device according to claim 1, characterized in that: The micro-perforated plates in the resonance units located in the same layer have the same perforation rate.

4. The sound absorbing device according to claim 3, characterized in that: The micro-perforated plates in the resonance units at different layers have different perforation rates.

5. The sound absorbing device according to claim 1, characterized in that: The heights of the different honeycomb core superstructures are the same.

6. The sound absorbing device according to any one of claims 1 to 5, characterized in that: The plurality of cavities in the micro-perforated plate resonance assembly belong to the same honeycomb core structure.

7. The sound absorbing device according to any one of claims 1 to 5, characterized in that: The multiple cavities in the multiple micro-perforated plate resonance components in the honeycomb core superstructure belong to the same honeycomb core structure; wherein partitions are provided between different micro-perforated plate resonance components.

8. The sound absorbing device according to any one of claims 1 to 5, characterized in that: The honeycomb core superstructure includes any one of the following: a circular honeycomb core superstructure, a rectangular honeycomb core superstructure, a hexagonal honeycomb core superstructure, and a triangular honeycomb core superstructure.

9. A sound absorbing device, characterized in that: The sound absorbing equipment comprises the sound absorbing device according to any one of claims 1-8.

10. A method for determining parameters of a sound absorbing device, characterized in that: The sound absorbing device is a sound absorbing device as claimed in any one of claims 1 to 8, and the method comprises: According to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device, a fitness function of the honeycomb core superstructure is constructed; wherein the target optimization variables of the fitness function include a vertical distance variable between micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and a perforation rate variable of the micro-perforated plates in the resonance units of different layers; Based on preset constraints, the fitness function of the honeycomb core superstructure is solved to obtain the target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters include the vertical distance between the microperforated plates in any two adjacent layers of resonance units in the microperforated plate resonance assembly, and the perforation rates of the microperforated plates in the resonance units of different layers; the vertical distance between the microperforated plates in the two adjacent layers of resonance units is the depth of the cavity in the top layer of the resonance units in the two adjacent layers of resonance units.

11. The method according to claim 10, characterized in that The step of constructing a fitness function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure in the sound absorbing device comprises: Constructing a sound absorption coefficient function of the honeycomb core superstructure according to the acoustic impedance of the honeycomb core superstructure; The fitness function of the honeycomb core superstructure is constructed according to the sound absorption coefficient function of the honeycomb core superstructure.

12. The method according to claim 10 or 11, characterized in that: The preset constraint conditions include a preset vertical distance constraint condition and a preset perforation rate constraint condition.

13. The method according to claim 10 or 11, characterized in that: The method further comprises: determining the acoustic impedance of each micro-perforated plate resonant assembly in the honeycomb core superstructure; The acoustic impedance of the honeycomb core superstructure is determined according to the acoustic impedance of each of the micro-perforated plate resonant assemblies.

14. The method according to claim 13, characterized in that Determining the acoustic impedance of each micro-perforated plate resonant assembly in the honeycomb core superstructure includes: For each of the micro-perforated plate resonant assemblies, determining the acoustic impedance of each resonant unit in the micro-perforated plate resonant assembly; The acoustic impedance of the micro-perforated plate resonance assembly is determined according to the acoustic impedance of each of the resonance units.

15. A device for determining parameters of a sound absorbing device, characterized in that: The sound absorbing device is a sound absorbing device as claimed in any one of claims 1 to 8, wherein the parameter determination device comprises: A construction module is used to construct a fitness function of the honeycomb core superstructure in the sound absorbing device according to the acoustic impedance of the honeycomb core superstructure; wherein the target optimization variables of the fitness function include a vertical distance variable between micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and a perforation rate variable of the micro-perforated plates in the resonance units of different layers; A solution module is used to solve the fitness function of the honeycomb core superstructure based on preset constraints to obtain the target optimization parameters corresponding to the target optimization variables; wherein the target optimization parameters include the vertical distance between the micro-perforated plates in any two adjacent layers of resonance units in the micro-perforated plate resonance assembly, and the perforation rate of the micro-perforated plates in the resonance units of different layers; the vertical distance between the micro-perforated plates in the two adjacent layers of resonance units is the depth of the cavity in the top resonance unit of the two adjacent layers of resonance units.

16. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 10 to 14 are implemented.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 14 are implemented.

18. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 14 are implemented.

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