Silencing structure and method of operation thereof

Abstract

The application relates to the field of noise elimination technology and discloses a noise elimination structure and a working method thereof. The noise elimination structure comprises a bottom plate, a noise elimination hole plate which is arranged in a first direction and forms a sandwich space, a stand column which is arranged between the noise elimination hole plate and the bottom plate, one end of the stand column being connected with the bottom plate and the other end being connected with the noise elimination hole plate, noise elimination wires which are made of elastic materials, one end of the noise elimination wires being fixedly connected with the stand column and the other end being arranged in a suspended mode in the sandwich space, and a plurality of noise elimination wires which are arranged on the outer side wall of the stand column in a circumferential direction. The noise elimination wires are suitable for being deformed under the action of the sound pressure of noise to convert noise energy into vibration mechanical energy. The noise elimination structure has the advantages of energy absorption and conversion in a full-frequency range of noise and can adapt to a multi-frequency complex noise source by arranging the noise elimination wires on the stand column and converting noise energy entering the inside of the noise elimination structure into mechanical energy through mechanical vibration deformation of the noise elimination wires.

Description

Technical Field

[0001] This invention relates to the field of noise reduction technology, specifically to a noise reduction structure and its working method. Background Technology

[0002] Currently, the most widely used resonant sound-absorbing structure in power equipment such as engines and gas turbines is the honeycomb perforated panel resonant sound-absorbing structure. This structure consists of a honeycomb core material of a certain thickness and two panels, with the upper panel being a perforated plate with a certain number and size of holes drilled, and the lower panel being a rigid backing plate for mounting the honeycomb core material. In this sandwich structure, each honeycomb cell can be regarded as an independent Helmholtz resonant cavity. When sound waves enter the honeycomb core, the vibration of the air inside the cells and cavities acts like a "piston" and a "spring," respectively, preventing changes in volume, velocity, and sound pressure, thus achieving a sound-absorbing effect.

[0003] However, the aforementioned honeycomb perforated plate resonant noise reduction structure, because it utilizes the Helmholtz resonant cavity principle, can only absorb and dissipate the noise frequency energy that resonates with the gas in the resonant cavity. Noise at other frequencies cannot be absorbed well, resulting in a narrow noise absorption bandwidth that cannot adapt to complex multi-frequency noise sources. Summary of the Invention

[0004] In view of this, the present invention provides a noise reduction structure and its working method to solve the problem that existing honeycomb perforated plate resonant noise reduction structures can only absorb and dissipate the noise frequency energy that resonates with the gas in the resonant cavity, while noise at other frequencies cannot be well absorbed, resulting in a narrow noise absorption bandwidth. The noise reduction wire of the present invention vibrates and deforms under the sound pressure of noise to convert noise energy into vibrational mechanical energy, thereby significantly attenuating the noise. It has the advantage of energy absorption and conversion across the entire noise frequency range and can adapt to complex multi-frequency noise sources.

[0005] In a first aspect, the present invention provides a noise reduction structure, comprising:

[0006] Base plate;

[0007] The sound-absorbing perforated plate is spaced apart from the base plate along the first direction to form an interlayer space;

[0008] The column is installed between the sound-absorbing perforated plate and the base plate. One end of the column along the first direction is connected to the base plate, and the other end is connected to the sound-absorbing perforated plate.

[0009] The sound-absorbing wire is made of elastic material. One end of the sound-absorbing wire is fixedly connected to the column, and the other end is suspended in the interlayer space. Several sound-absorbing wires are arranged circumferentially on the outer peripheral wall of the column. The sound-absorbing wires are suitable for vibrating and deforming under the action of noise sound pressure to convert noise energy into vibration mechanical energy.

[0010] By installing silencing wires on the columns, the mechanical vibration and deformation of the silencing wires can convert the noise energy entering the silencing structure into mechanical energy. Compared with traditional honeycomb silencing structures, it has the advantage of energy absorption and conversion across the entire noise frequency range and can adapt to complex multi-frequency noise sources.

[0011] In one optional embodiment, the diameter of the silencing wire is d, where d satisfies 0.5mm≤d≤1.0mm.

[0012] This ensures that the noise-absorbing wire has a strong ability to absorb noise energy, while also maintaining its high sensitivity to relatively small noises, thus enabling efficient absorption of noise energy.

[0013] In one optional embodiment, a through hole is provided on the silencing plate along a first direction; the silencing structure also includes a silencing cylinder, one end of which is fixedly connected to the base plate along the first direction, and the other end passes through the through hole and extends to the side of the silencing plate away from the base plate; the inner peripheral wall of the silencing cylinder is adapted to enclose and form a first silencing hole.

[0014] The inner peripheral wall of the silencer cylinder forms the first silencer hole. During the operation of the silencer structure, the first silencer hole is suitable for guiding noise into the silencer structure, so that the noise compresses the air in the silencer structure. Under the action of the viscosity force of the air in the silencer structure, the noise is attenuated.

[0015] The sound-absorbing perforated plate and the base plate are simultaneously fixedly connected by a sound-absorbing cylinder and a column, thereby strengthening the connection between the sound-absorbing perforated plate and the base plate. This allows the sound-absorbing structure to have both sound absorption and load-bearing functions, making it better suited for sound absorption applications at load-bearing components.

[0016] In one optional embodiment, the diameter of the first silencing hole is D1, where D1 satisfies 10mm≤D1≤20mm.

[0017] On the one hand, it is more conducive to the noise pressure passing through the first silencing hole into the interior of the silencing structure, which helps to improve the silencing efficiency. On the other hand, it can leave enough installation space for the silencing wires, ensuring a sufficient number of silencing wires to be installed, thereby improving the noise absorption efficiency.

[0018] In one optional embodiment, a plurality of second silencing holes are provided on the outer peripheral wall of the silencing cylinder, one end of the second silencing hole is connected to the first silencing hole, and the other end is connected to the interlayer space.

[0019] The first noise-absorbing hole is connected to the interlayer space through the second noise-absorbing hole, so that the attenuated noise is introduced into the interlayer space and attenuated again by the noise-absorbing wire.

[0020] In one optional embodiment, the diameter of the second silencing hole is D2, where D2 satisfies 4mm≤D2≤8mm.

[0021] On the one hand, it is more conducive to the noise sound pressure passing through the second silencing hole into the interior of the silencing structure, which helps to improve the silencing efficiency. On the other hand, it can prevent the noise sound pressure from entering the interior of the silencing structure through the second silencing hole and then being transmitted out again through the second silencing hole, so that the noise can be fully absorbed by the silencing wire in the silencing structure and ensure the noise absorption efficiency.

[0022] In one optional embodiment, a silencer cylinder is installed between any four adjacent columns, and the distance between any silencer cylinder and its four adjacent columns is equal. This effectively absorbs noise entering the interlayer space through the silencer cylinder.

[0023] In one optional embodiment, the columns are evenly spaced on the base plate along the second direction and the third direction; the distance between any two adjacent sound-absorbing wires on the second direction or the third direction is H, where H satisfies 0 < H < D2.

[0024] On the one hand, it can prevent interference between the silencing wires on the two adjacent columns and ensure the noise absorption performance of the silencing wires. On the other hand, it can make the noise be attenuated in time after entering the interlayer space through the second silencing hole, thereby improving the noise absorption efficiency.

[0025] In one alternative implementation, the column is a solid structure, thereby enhancing its load-bearing capacity.

[0026] Secondly, the present invention also provides a method for operating the sound-absorbing structure as described above, comprising:

[0027] Noise is introduced into the noise-absorbing structure through the first noise-absorbing hole, which compresses the air inside the noise-absorbing structure, so that the noise is initially attenuated under the action of the viscous force of the air inside the noise-absorbing structure.

[0028] The attenuated noise is introduced into the interlayer space between the attenuating plate and the base plate through the second silencing hole, so that the silencing wire vibrates and deforms under the sound pressure of the noise, converting the noise energy into vibration mechanical energy, thereby greatly attenuating the noise.

[0029] Compared with the traditional silencing method of honeycomb silencing structure, it has the advantage of energy absorption and conversion across the entire noise frequency range, and can adapt to complex multi-frequency noise sources. Compared with the traditional silencing method of micro-perforated plate silencing structure, it not only reduces the processing difficulty and cost, but also makes it easier for noise sound pressure to enter the interior of the silencing structure, which helps to improve the noise silencing effect and has a wider range of noise absorption frequencies. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of a noise reduction structure according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 The first cross-sectional view of the sound-absorbing structure shown;

[0033] Figure 3 for Figure 1 The side view of the sound-absorbing structure shown;

[0034] Figure 4 for Figure 3 A magnified view of a portion of point P in the middle;

[0035] Figure 5 for Figure 1 The second cross-sectional view of the sound-absorbing structure shown.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10. Base plate;

[0038] 20. Silencing perforated plate;

[0039] 30. Columns;

[0040] 40. Sound-absorbing wire;

[0041] 50. Silencing cylinder; 51. First silencing hole; 52. Second silencing hole. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0044] According to an embodiment of the present invention, in one aspect, a noise reduction structure is provided, comprising:

[0045] Base plate 10;

[0046] The sound-absorbing perforated plate 20 is spaced apart from the base plate 10 along the first direction to form a sandwich space;

[0047] The column 30 is disposed between the sound-absorbing perforated plate 20 and the base plate 10. One end of the column 30 along the first direction is connected to the base plate 10, and the other end is connected to the sound-absorbing perforated plate 20.

[0048] The sound-absorbing wire 40 is made of elastic material. One end of the sound-absorbing wire 40 is fixedly connected to the column 30, and the other end is suspended in the interlayer space. Several sound-absorbing wires 40 are arranged circumferentially on the outer peripheral wall of the column 30. The sound-absorbing wires 40 are adapted to vibrate and deform under the action of noise sound pressure in order to convert noise energy into vibration mechanical energy.

[0049] It should be noted that, please refer to Figure 1 and Figure 2 As shown, the silencing perforated plate 20 and the base plate 10 are arranged parallel to each other, and the silencing perforated plate 20 and the base plate 10 are spaced apart along the first direction to form a sandwich space; the shape of the silencing perforated plate 20 and the base plate 10 can be polygonal or cylindrical, and can be adjusted according to the installation environment of the application site; the column 30 is installed between the silencing perforated plate 20 and the base plate 10, one end of the column 30 along the first direction is fixedly connected to the base plate 10, and the other end is connected to the silencing perforated plate 20. The column 30 is the load-bearing component of the entire silencing structure, and the column 30 is also suitable for installing the silencing wire 4. 0; The silencing wires 40 are evenly and densely distributed along the circumferential direction on the outer peripheral wall of the column 30. One end of any silencing wire 40 along its own length direction is fixed to the outer peripheral wall of the column 30, and the other end is suspended in the interlayer space. The silencing wires 40 are made of elastic material and can be millimeter-level metal wires. The silencing wires 40 have elastic restoring force. When noise enters the interlayer space, the silencing wires 40 vibrate and deform under the action of the sound pressure of the noise to convert the noise energy into vibration mechanical energy, thereby greatly attenuating the noise.

[0050] It is worth noting that traditional honeycomb silencing structures, due to their use of the Helmholtz resonant cavity principle, can only absorb and dissipate the noise frequency energy that resonates with the gas in the resonant cavity, and are difficult to effectively absorb noise at other frequencies. The present invention, by setting up silencing wires 40, utilizes the mechanical vibration deformation of silencing wires 40 to convert the noise energy entering the silencing structure into mechanical energy. Compared with traditional honeycomb silencing structures, it has the advantage of absorbing and converting energy across the entire noise frequency range and can adapt to complex multi-frequency noise sources.

[0051] Optionally, any of the silencing wires 40 may be arranged radially along the column 30.

[0052] In one embodiment, the diameter of the silencing wire 40 is d, where d satisfies 0.5mm≤d≤1.0mm.

[0053] It should be noted that the silencing wire 40 needs to have a certain elastic modulus so that it can vibrate and deform under the action of sound pressure. The diameter of the silencing wire 40 should not be too small, otherwise the elastic modulus of the silencing wire 40 will be too small, which will weaken the ability of the silencing wire 40 to absorb noise energy. Therefore, the diameter d of the silencing wire 40 needs to satisfy d≥0.5mm. If the diameter of the silencing wire 40 is too large, the elastic modulus of the silencing wire 40 will be too large, which will reduce the sensitivity of the silencing wire 40 to relatively small noise. Therefore, a larger noise sound pressure is required to make the silencing wire 40 vibrate, which is not conducive to the absorption of noise energy. Therefore, the diameter d of the silencing wire 40 also needs to satisfy d≤1.0mm.

[0054] In this embodiment, the diameter d of the silencing wire 40 is in the range of 0.5mm≤d≤1.0mm, which ensures that the silencing wire 40 has a strong ability to absorb noise energy and maintains a high sensitivity to relatively small noise, thereby enabling efficient absorption of noise energy.

[0055] In one embodiment, the sound-absorbing perforated plate 20 has through holes along a first direction;

[0056] The sound-absorbing structure also includes a sound-absorbing cylinder 50, one end of which is fixedly connected to the base plate 10 along the first direction, and the other end passes through the through hole and extends to the side of the sound-absorbing perforated plate 20 away from the base plate 10.

[0057] The inner peripheral wall of the silencer cylinder 50 is adapted to enclose and form the first silencer hole 51.

[0058] It should be noted that, please refer to Figure 1 and Figure 2 As shown, the silencing plate 20 has several through holes (not shown in the figure) along the first direction. The through holes are suitable for installing the silencing cylinder 50. One end of the silencing cylinder 50 along the first direction is fixedly connected to the base plate 10, and the other end passes through the through holes and extends to the side of the silencing plate 20 away from the base plate 10. The inner peripheral wall of the silencing cylinder 50 is suitable for forming a first silencing hole 51. During the operation of the silencing structure, the first silencing hole 51 is suitable for guiding noise into the silencing structure, so that the noise compresses the air in the silencing structure. Under the action of the viscosity force of the air in the silencing structure, the noise is attenuated.

[0059] In this embodiment, one end of the silencing cylinder 50 along the first direction is fixedly connected to the base plate 10, and the other end is fixedly connected to the silencing perforated plate 20. At the same time, one end of the column 30 along the first direction is fixedly connected to the base plate 10, and the other end is fixedly connected to the silencing perforated plate 20. This strengthens the connection between the silencing perforated plate 20 and the base plate 10, so that the silencing structure has the dual functions of silencing and load-bearing, and can be better used in silencing application scenarios at load-bearing components.

[0060] In one embodiment, the diameter of the first silencing hole 51 is D1, where D1 satisfies 10mm≤D1≤20mm.

[0061] It should be noted that, please refer to Figure 2 As shown, the inner peripheral wall of the silencing cylinder 50 forms a first silencing hole 51. In the silencing structure provided in this embodiment, the aperture of the first silencing hole 51 cannot be too small, otherwise it will be difficult for noise pressure to pass through the first silencing hole 51 into the interior of the silencing structure, resulting in a reduction in silencing efficiency. Therefore, the aperture D1 of the first silencing hole 51 must satisfy D1≥10mm. If the aperture of the first silencing hole 51 is too large, the diameter of the silencing cylinder 50 needs to be increased accordingly, which may lead to a relative reduction in the space inside the silencing structure, which in turn reduces the number of silencing wires 40 that can be installed, thus reducing the noise absorption efficiency. Therefore, the aperture D1 of the first silencing hole 51 must also satisfy D1≤20mm.

[0062] In this embodiment, the aperture D1 of the first silencing hole 51 is in the range of 10mm≤D1≤20mm. On the one hand, it is more conducive to the noise pressure passing through the first silencing hole 51 into the interior of the silencing structure, which helps to improve the silencing efficiency. On the other hand, it can leave enough installation space for the silencing wire 40, ensuring a sufficient number of silencing wires 40 installed, thereby improving the noise absorption efficiency.

[0063] In one embodiment, a plurality of second silencing holes 52 are provided on the outer peripheral wall of the silencing cylinder 50. One end of the second silencing hole 52 is connected to the first silencing hole 51, and the other end is connected to the interlayer space.

[0064] It should be noted that, please refer to Figure 2 As shown, a plurality of second noise reduction holes 52 are radially provided on the outer peripheral wall of the noise reduction cylinder 50. The second noise reduction holes 52 are evenly distributed circumferentially along the outer peripheral wall of the noise reduction cylinder 50. The second noise reduction holes 52 are adapted to connect the first noise reduction hole 51 with the interlayer space, thereby introducing the attenuated noise into the interlayer space so that the attenuated noise can be attenuated again by the noise reduction wire 40.

[0065] In one embodiment, the diameter of the second silencing hole 52 is D2, where D2 satisfies 4mm≤D2≤8mm.

[0066] It should be noted that, please refer to Figure 4 As shown, the aperture of the second silencing hole 52 cannot be too small, otherwise it will be difficult for the noise sound pressure to pass through the second silencing hole 52 into the interior of the silencing structure, resulting in a reduction in silencing efficiency. Therefore, the aperture D2 of the second silencing hole 52 must satisfy D2≥4mm. If the aperture of the second silencing hole 52 is too large, after the noise sound pressure enters the interior of the silencing structure through the second silencing hole 52, it is easy to be transmitted out again from the second silencing hole 52, causing the noise to leave the silencing structure before it can be fully absorbed by the silencing wire 40, resulting in a reduction in noise absorption efficiency.

[0067] In this embodiment, the aperture D2 of the second silencing hole 52 is in the range of 4mm≤D2≤8mm. On the one hand, this makes it easier for noise sound pressure to pass through the second silencing hole 52 and enter the interior of the silencing structure, which helps to improve the silencing efficiency. On the other hand, it can prevent noise sound pressure from entering the interior of the silencing structure through the second silencing hole 52 and then being transmitted out again through the second silencing hole 52, so that the noise can be fully absorbed by the silencing wire 40 in the silencing structure, ensuring the noise absorption efficiency.

[0068] It is worth noting that traditional micro-perforated plate sound-absorbing structures need to minimize the diameter of the sound-absorbing holes. The diameter of micro-perforated plates is usually about 0.1mm in order to increase the acoustic resistance of the sound-absorbing structure and broaden the sound-absorbing frequency band. However, processing dense small holes on a plate of a certain thickness is not only difficult to process, but also costly. Based on the silencing wire 40, this invention provides a first silencing hole 51 and a second silencing hole 52. The diameters of both the first and second silencing holes 51 and 52 are much larger than those of traditional micro-perforated plates. This not only reduces processing difficulty and cost, but more importantly, firstly, the increased hole diameter facilitates the sequential passage of noise pressure through the first and second silencing holes 51 and 52 into the silencing structure, improving the noise reduction effect. Secondly, as the noise pressure enters the silencing structure through the first and second silencing holes 51 and 52, it compresses the air within the structure. Under the viscous force of the air, the noise is attenuated, improving silencing efficiency. Subsequently, the attenuated noise enters the interlayer space between the perforated plate 20 and the base plate 10. At this point, the silencing wire 40 vibrates and deforms under the noise pressure, converting noise energy into vibrational mechanical energy, thereby significantly reducing noise and expanding the noise absorption frequency range.

[0069] In one embodiment, a silencer cylinder 50 is provided between any four adjacent columns 30, and the distance between any silencer cylinder 50 and its four adjacent columns 30 is equal.

[0070] It should be noted that, please refer to Figure 1As shown, a silencer cylinder 50 is provided between any four adjacent columns 30. Each silencer cylinder 50 is located at the intersection of the diagonals between the four columns 30. The distance between any silencer cylinder 50 and its four adjacent columns 30 is equal, thereby fully absorbing the noise entering the interlayer space through the silencer cylinder 50.

[0071] In one embodiment, the columns 30 are evenly spaced on the base plate 10 along the second direction and the third direction; the distance between any two adjacent columns 30 along the second direction or the third direction is H, where H satisfies 0 < H < D2.

[0072] Please see Figure 1 As shown, the columns 30 are evenly spaced along the second and third directions on the base plate 10, which not only allows the sound-absorbing wires 40 on the columns 30 to fully absorb the noise entering the interlayer space, but also ensures that the internal load of the sound-absorbing structure is uniform, thus making it better suited for sound-absorbing applications at load-bearing components.

[0073] It should be noted that, please refer to Figure 4 As shown, the distance H between any two adjacent sound-absorbing wires 40 on any two adjacent columns 30 along the second direction or the third direction satisfies H > 0, thereby avoiding interference between the sound-absorbing wires 40 on the two adjacent columns 30, so that the vibration of the sound-absorbing wires 40 is not affected, and the noise absorption performance of the sound-absorbing wires 40 is guaranteed; at the same time, the distance H between any two adjacent columns 30 along the second direction or the third direction also needs to satisfy H < D2, so that the noise can be attenuated in time after entering the interlayer space through the second sound-absorbing hole 52, thereby improving the noise absorption efficiency.

[0074] In this embodiment, the distance H between any two adjacent sound-absorbing wires 40 on the second or third direction is 0 < H < D2. On the one hand, this can avoid interference between the sound-absorbing wires 40 on the two adjacent columns 30, ensuring the noise absorption performance of the sound-absorbing wires 40. On the other hand, it can ensure that the noise can be attenuated in time after entering the interlayer space through the second sound-absorbing hole 52, thereby improving the noise absorption efficiency.

[0075] In one embodiment, the column 30 is a solid structure, thereby enhancing the load-bearing capacity of the column 30.

[0076] According to an embodiment of the present invention, in another aspect, a method for operating the sound-absorbing structure as described above is also provided, comprising:

[0077] Noise is introduced into the noise-absorbing structure through the first noise-absorbing hole 51, which compresses the air in the noise-absorbing structure, so that the noise is initially attenuated under the action of the viscous force of the air in the noise-absorbing structure.

[0078] The attenuated noise is introduced into the interlayer space between the attenuating plate 20 and the base plate 10 through the second silencing hole 52, so that the silencing wire 40 vibrates and deforms under the sound pressure of the noise, converting the noise energy into vibration mechanical energy, thereby greatly attenuating the noise.

[0079] The working method of the noise reduction structure provided in this embodiment introduces noise into the noise reduction structure through the first noise reduction hole 51, which compresses the air present in the noise reduction structure. Under the action of the viscosity force of the air in the noise reduction structure, the noise is initially attenuated. The attenuated noise is introduced into the interlayer space between the noise reduction perforated plate 20 and the bottom plate 10 through the second noise reduction hole 52, which causes the noise reduction wire 40 to vibrate and deform under the action of the noise sound pressure, converting the noise energy into vibration mechanical energy, so as to significantly reduce the noise. Compared with the noise reduction method of the traditional honeycomb noise reduction structure, it has the advantage of energy absorption and conversion across the entire noise frequency range, and can adapt to complex multi-frequency noise sources. Compared with the noise reduction method of the traditional micro-perforated plate noise reduction structure, it not only reduces the processing difficulty and processing cost, but also facilitates the entry of noise sound pressure into the interior of the noise reduction structure, which helps to improve the noise reduction effect and has a wider range of noise absorption frequencies.

[0080] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sound-absorbing structure, characterized in that, include: Base plate (10); A sound-absorbing perforated plate (20) is spaced apart from the base plate (10) along a first direction to form a sandwich space; A column (30) is disposed between the sound-absorbing perforated plate (20) and the base plate (10). One end of the column (30) along the first direction is connected to the base plate (10), and the other end is connected to the sound-absorbing perforated plate (20). The sound-absorbing wire (40) is made of elastic material. One end of the sound-absorbing wire (40) is fixedly connected to the column (30), and the other end is suspended in the interlayer space. A plurality of the sound-absorbing wires (40) are arranged circumferentially on the outer peripheral wall of the column (30). The sound-absorbing wires (40) are adapted to vibrate and deform under the action of noise sound pressure to convert noise energy into vibration mechanical energy.

2. The sound-absorbing structure according to claim 1, characterized in that, The diameter of the sound-absorbing wire (40) is d, and d satisfies 0.5mm≤d≤1.0mm.

3. The sound-absorbing structure according to claim 1, characterized in that, The sound-absorbing perforated plate (20) has through holes along the first direction; The sound-absorbing structure also includes a sound-absorbing cylinder (50), one end of which is fixedly connected to the base plate (10) along the first direction, and the other end passes through the through hole and extends to the side of the sound-absorbing perforated plate (20) away from the base plate (10). The inner peripheral wall of the silencer cylinder (50) is adapted to enclose and form the first silencer hole (51).

4. The sound-absorbing structure according to claim 3, characterized in that, The diameter of the first silencing hole (51) is D1, and D1 satisfies 10mm≤D1≤20mm.

5. The sound-absorbing structure according to claim 3, characterized in that, The outer peripheral wall of the silencing cylinder (50) is provided with a plurality of second silencing holes (52), one end of the second silencing hole (52) is connected to the first silencing hole (51), and the other end is connected to the interlayer space.

6. The sound-absorbing structure according to claim 5, characterized in that, The diameter of the second silencing hole (52) is D2, and D2 satisfies 4mm≤D2≤8mm.

7. The sound-absorbing structure according to claim 3, characterized in that, A silencer cylinder (50) is provided between any four adjacent columns (30), and the distance between any silencer cylinder (50) and its four adjacent columns (30) is equal.

8. The sound-absorbing structure according to claim 6, characterized in that, The columns (30) are evenly spaced along the second direction and the third direction on the base plate (10); the distance between any two adjacent sound-absorbing wires (40) on the columns (30) along the second direction or the third direction is H, where H satisfies 0 < H < D2.

9. The sound-absorbing structure according to any one of claims 1-8, characterized in that, The column (30) is a solid structure.

10. A method for operating a sound-absorbing structure as described in any one of claims 1-9, characterized in that, include: Noise is introduced into the noise-absorbing structure through the first noise-absorbing hole (51), so that the noise compresses the air in the noise-absorbing structure, and the noise is initially attenuated under the action of the viscous force of the air in the noise-absorbing structure. The attenuated noise is introduced into the interlayer space between the attenuating plate (20) and the base plate (10) through the second silencing hole (52), so that the silencing wire (40) vibrates and deforms under the sound pressure of the noise, converting the noise energy into vibration mechanical energy, so that the noise is greatly attenuated.

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