Acoustic black hole structure and acoustic black hole assembly

Abstract

The application provides an acoustic black hole structure, which comprises a bottom beam, a first structural part, a second structural part, an elastic part, an elastic plate and a mass block; the bottom beam is used for being fixed with an external support; the first structural part is fixed on one side of the upper surface of the bottom beam, and the second structural part is fixed on the other side of the upper surface of the bottom beam through the elastic part; a first curved slot recessed to the bottom beam is formed on the upper surface of the first structural part; a pair of second curved slots recessed inward are formed on both ends of the y-axis of the second structural part, so that the second structural part is in a vertically arranged hourglass-shaped structure; the first curved slot and the two second curved slots form three acoustic black holes; a part of the length direction of the elastic plate is fixed on the upper end surface of the second structural part, and the other part is suspended and arranged above the first curved slot; the mass block is fixed on the side of the elastic plate away from the second structural part; the top end of the second structural part is higher than that of the first structural part; and the application can effectively suppress low-frequency vibration.

Description

Technical Field

[0001] This invention relates to the field of steel structure engineering technology, and more specifically, to an acoustic black hole structure and acoustic black hole components. Background Technology

[0002] In astrophysics, a black hole forms when matter reaches a sufficiently high density and collapses into a "singularity." Black holes possess such immense gravity that no matter, not even light, can escape the gravitational pull of their boundary.

[0003] Inspired by black holes in astrophysics, physicists have proposed the concept of acoustic black holes. Acoustic black holes, through power-law clipping, form a wave-manipulating structure with gradually changing impedance. Because the phase velocity and group velocity of elastic waves change due to the gradual change in impedance, and gradually decrease, ideally decreasing to zero, they cannot propagate to the edge and do not reflect. This produces a bending wave aggregation effect, forming a high-energy-density region. Simply put, acoustic black holes are similar to celestial black holes; they absorb sound waves, preventing their escape. Therefore, acoustic black holes are widely used in civil engineering, geotechnical engineering, bridge and tunnel engineering, and steel structure engineering to absorb sound waves and achieve vibration reduction.

[0004] When sound waves, which are vibrations, propagate through a medium, the higher the frequency, the shorter the wavelength, the faster the energy attenuates, and the less harmful the resulting vibration. Therefore, acoustic black holes can effectively reduce the harm caused by high-frequency vibrations. However, the lower the frequency, the longer the wavelength, the slower the energy attenuation during propagation, and the greater the harm. Therefore, to reduce the harm caused by vibrations, the suppression of low-frequency vibrations should be the primary focus. While traditional acoustic black holes are often effective at suppressing high-frequency sound waves, further improvements to acoustic black holes are needed to suppress low-frequency vibrations. Summary of the Invention

[0005] The problem solved by this invention is to provide an acoustic black hole structure and acoustic black hole components, which are specifically applied in the field of steel structure engineering. The structure is simple, the design is reasonable, and it can effectively suppress low-frequency vibrations.

[0006] To address the above problems, the present invention provides an acoustic black hole structure, comprising:

[0007] The structure includes a bottom beam, a first structural component, a second structural component, an elastic component, an elastic plate, and a mass block. The length of the bottom beam is coaxial with the y-axis and is used to fix it to the external support components.

[0008] The first structural component is fixed to one side of the upper surface of the bottom beam, and the second structural component is fixed to the other side of the upper surface of the bottom beam by means of an elastic element;

[0009] The upper surface of the first structural component has a first curved groove that is recessed towards the bottom beam; both ends of the second structural component in the y-axis direction have a pair of inwardly recessed second curved grooves, making the second structural component a vertically arranged hourglass-shaped structure; the first curved groove and the two second curved grooves constitute three acoustic black holes.

[0010] A portion of the elastic plate along its length is fixed to the upper end face of the second structural member, while the other portion is suspended in the air; the mass block is fixed on the side of the elastic plate away from the second structural member; the second structural member, the elastic member, the elastic plate, and the mass block constitute an inertia amplification mechanism to increase the dynamic mass of the mass block;

[0011] The bottom curve h(x) of the first curved groove and the two second curved grooves satisfies the following expression:

[0012]

[0013] Where L represents the straight-line distance between the two ends of the groove bottom along its length; for the first structural component, it represents the straight-line distance from the bottom of the first structural component to the top of the first curved groove; for the second structural component, it represents the straight-line distance from the center line S of the second structural component to the top of the second curved groove; for the first structural component, it represents the straight-line distance from the bottom of the first curved groove to the bottom of the first structural component; for the second structural component, it represents the straight-line distance from the bottom of the second curved groove to the center line S; and is the independent variable of the function.

[0014] The beneficial effects of this invention are as follows: the first curved groove and the two second curved grooves constitute three acoustic black holes, which can simultaneously absorb sound waves and then reduce them in a gradient. By setting multiple acoustic black holes on a single structure, the propagation bandwidth of the sound waves is expanded. Through the additional oscillator structure, the high-frequency bandgap is reduced and the low-frequency bandgap is expanded, thereby effectively suppressing low-frequency vibrations. The second structural component, the elastic component, the elastic plate, and the mass block form an inertial amplification device to amplify the dynamic mass of the mass block to generate a wide bandgap. When sound wave vibration occurs, the second structural component, as the oscillator structure, will... Vibration occurs because the elastic plate and the mass block are additional oscillator structures. Therefore, the vibration of the second structural component will cause the elastic plate to vibrate, and the vibration of the elastic plate will cause the mass block to vibrate. The vibration of the mass block will increase the dynamic mass of the entire oscillator structure. Since the mass block is fixed on the side of the elastic plate away from the second structural component, the arm length from the mass block to the elastic component is maximized. According to the oscillator resonance frequency formula, the larger the ratio of the oscillator mass to the arm length, the smaller the resonance frequency will be. This will also reduce the high-frequency band gap of the entire structure, thereby expanding the low-frequency band gap and effectively suppressing low-frequency vibration.

[0015] Furthermore, damping components are provided on the bottom of both the first curved groove and the second curved groove.

[0016] The beneficial effect of this setup is that it can dissipate the power of the central region of an acoustic black hole, suppress the propagation of curved waves, and thus better suppress low-frequency vibrations.

[0017] Furthermore, the first structural component includes a first sub-structural component and a second sub-structural component, which together form an integral first curved groove; the first sub-structural component is made of a rigid metallic material, and the second sub-structural component is made of a rigid non-metallic material.

[0018] The beneficial effect of this setup is that, due to the significant difference in materials between the first and second substructure components, the transmission of sound waves results in different refractions and reflections due to the different media, forming an impedance mismatch. This leads to a wide bandgap in the low-frequency range, thereby effectively controlling the vibration within that bandgap frequency range.

[0019] Furthermore, the first sub-structural component is made of aluminum, and the second sub-structural component is made of PMMA.

[0020] The beneficial effect of this setup is that the first substructure is made of aluminum and the second substructure is made of PMMA. In this case, the different materials of the first and second substructures cause different refractions and reflections of sound waves due to the different media, resulting in impedance mismatch. This allows for the acquisition of a wide bandgap in the low-frequency range, thereby effectively controlling the vibration within that bandgap frequency range.

[0021] Furthermore, the elastic element is made of epoxy resin.

[0022] The beneficial effect of this design is that the epoxy resin will have a certain degree of elasticity after curing, which allows the second structural component to be effectively fixed to the bottom beam without affecting its normal vibration.

[0023] Furthermore, the tops of the two grooves of the first curved groove are flush; the tops of the two grooves of the second curved groove are flush.

[0024] The beneficial effect of this setting is that the acoustic black hole openings on the first and second curved grooves have a more uniform structure, which can fully absorb sound waves and attenuate them evenly, without the situation of uneven absorption caused by one being higher and the other lower.

[0025] Furthermore, it also includes a pair of vertically arranged support members; a support surface is formed between the suspended part of the elastic plate and the upper end surface of the second structural member; the lower ends of the two support members are fixed to the side wall of the bottom beam, and the upper ends are located on both sides of the support surface and are fixed to the elastic plate to form a support.

[0026] The beneficial effect of this design is to ensure the strength of the elastic plate, making it less prone to breakage.

[0027] Furthermore, the mass block is made of lead; the bottom beam is made of steel; and the second structural member, elastic plate, and support members are all made of aluminum.

[0028] The beneficial effects of this setup are that the lead mass block can effectively move and change its dynamic mass; the steel base beam can ensure strength; and the aluminum second structural component, elastic plate, and support components can ensure strength, while the aluminum elastic plate has good elasticity.

[0029] Furthermore, the elastic plate is arranged parallel to the length direction of the bottom beam, the elastic plate is positioned directly above the bottom beam, and the mass block is positioned directly above the first curved groove.

[0030] The advantage of this design is that it minimizes the overall structural volume, which facilitates installation.

[0031] The present invention also provides an acoustic black hole structure component. According to the above-mentioned acoustic black hole structure, there are multiple bottom beams, all of which are coaxially arranged with the y-axis, and each bottom beam is integrally formed along the y-axis; each bottom beam is provided with a first structural component, a second structural component, an elastic component, an elastic plate, a mass block, a first curved groove, and a second curved groove.

[0032] The beneficial effect of this setup is that it allows the acoustic black holes to form a group and be fixed to the external support structure to work effectively. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram showing multiple versions of the present invention connected end-to-end in actual use;

[0035] Figure 3 This is a schematic diagram of the parameters in the curve function h(x) of this invention;

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

[0037] 1-Bottom beam, 2-First structural component, 2.1-First sub-structural component, 2.2-Second sub-structural component, 3-Second structural component, 4-Elastic component, 5-Elastic plate, 6-Mass block, 7-Support component, 8-Damping component, 21-First curved groove, 31-Second curved groove, 53-Support surface, S-Center line. Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. (The accompanying drawings of embodiments of the invention are also included.) Figure 1 A coordinate system xyz is set up, where the positive x-axis represents forward, the negative x-axis represents backward, the positive y-axis represents right, the negative y-axis represents left, the positive z-axis represents up, and the negative z-axis represents down. (Appendix) Figure 3 The coordinate system in this invention is not a positional coordinate system, but a function coordinate system of the curve function h(x). Therefore, all descriptions of position or positional relationships in this invention are based on the appendix. Figure 1 The coordinate system in the image is used as the reference.

[0040] Additionally, it should be noted that this invention exhibits good performance within a low-frequency wide bandwidth range of 1Hz-300Hz. (See attached image.) Figure 1 As shown, a center line S is provided on the second structural member 3, which divides the second structural member 3 into two symmetrical structural members, left and right. Both symmetrical structural members have S as their base, so that the base S of the two symmetrical structural members on the second structural member 3 can be attached to the bottom edge. Figure 3 The x-axis of the function coordinate system coincides with the curve function h(x), so that the curve function h(x) can correspond to the bottom curve of the second curved groove 31. Therefore, it can be easily seen that when the curve function h(x) is applied to the second structural component 3, it is the straight-line distance from the center line S to the top of the second curved groove 31.

[0041] This embodiment provides an acoustic black hole structure, including:

[0042] The components include a bottom beam 1, a first structural component 2, a second structural component 3, an elastic component 4, an elastic plate 5, and a mass block 6. The length of the bottom beam 1 is coaxial with the y-axis and is used to fix it to the external support components.

[0043] The first structural component 2 is fixed to one side of the upper surface of the bottom beam 1, and the second structural component 3 is fixed to the other side of the upper surface of the bottom beam 1 by means of the elastic component 4.

[0044] The upper surface of the first structural component 2 is provided with a first curved groove 21 that is recessed into the bottom beam 1; both ends of the second structural component 3 in the y-axis direction are provided with a pair of inwardly recessed second curved grooves 31, so that the second structural component 3 is a vertically arranged hourglass structure; the first curved groove 21 and the two second curved grooves 31 constitute three acoustic black holes.

[0045] A portion of the elastic plate 5 along its length is fixed to the upper end face of the second structural member 3, while the other portion is suspended in the air; the mass block 6 is fixed on the elastic plate 5 on the side away from the second structural member 3; the second structural member 3, the elastic member 4, the elastic plate 5, and the mass block 6 constitute an inertia amplification mechanism, used to increase the dynamic mass of the mass block 6;

[0046] The bottom curve h(x) of the first curved groove 21 and the two second curved grooves 31 satisfies the following expression:

[0047]

[0048] Where L represents the straight-line distance between the two ends along the length of the groove bottom; for the first structural member 2, h0 represents the straight-line distance from the bottom of the first structural member 2 to the top of the first curved groove 21; for the second structural member 3, h0 represents the straight-line distance from the center line S of the second structural member 3 to the top of the second curved groove 31; for the first structural member 2, h t This represents the straight-line distance from the bottom of the first curved groove 21 to the bottom of the first structural member 2; for the second structural member 3, h represents... t x represents the straight-line distance from the bottom of the second curved groove 31 to the center line S; x is the independent variable of the function.

[0049] Specifically, the top of the second curved groove 31 refers to the end of the second curved groove 31 that opens in the y-axis direction; the bottom beam 1 has a strip-shaped cuboid structure, and both the first structural member 2 and the second structural member 3 have a plate-like structure. Both the first structural member 2 and the second structural member 3 are vertically arranged. The bottom surface of the first structural member 2 is fixedly mounted on the upper surface of the bottom beam 1, and the bottom surface of the second structural member 3 is fixed to the upper surface of the bottom beam 1 by an elastic member 4. The contact surface dimensions between the first structural member 2, the second structural member 3, and the bottom beam 1 are consistent. This structure includes the bottom beam 1, the first structural member 2, and the second structural member 3. The three components (component 3, 4, and 5) form a relatively robust structure with high strength. When the second structural component 3 protrudes above the top of the first structural component 2, the protrusion distance of the second structural component 3 is not less than one-third of the height of the first structural component 2, ensuring that the elastic plate 5 has sufficient vibration space. The height of the mass block 6 does not exceed five times the thickness of the elastic plate 5, preventing the mass block 6 from being too heavy and causing the elastic plate 5 to break. The length of the elastic plate 5 does not exceed three-quarters of the length of the bottom beam 1. The length direction of the elastic plate 5 is consistent with and parallel to the length direction of the bottom beam 1, with the elastic plate 5 positioned directly above the bottom beam 1 and the mass block 6 positioned directly above the first curved groove 21. The upper surface of the second structural component 3 protrudes above the top of the first structural component 2. The first curved groove 21 and the two second curved grooves 31 constitute three acoustic black holes, which can simultaneously absorb sound waves and reduce them in a gradient manner. By setting multiple acoustic black holes on one structure, the high-frequency bandgap is reduced and the low-frequency bandgap is expanded, thereby effectively suppressing low-frequency vibration. On the other hand, the second structural component 3, the elastic component 4, the elastic plate 5, and the mass block 6 form an inertial amplification device to amplify... The dynamic mass of the large mass block 6 creates a wide bandgap. When sound wave vibration occurs, the second structural member 3, which is part of the oscillator structure, will vibrate. Since the elastic plate 5 and the mass block 6 are further added to the oscillator structure, the vibration of the second structural member 3 will drive the elastic plate 5 to vibrate, and the vibration of the elastic plate 5 will drive the mass block 6 to vibrate. The vibration of the mass block 6 will increase the dynamic mass of the entire oscillator structure. Since the mass block 6 is fixed on the elastic plate 5 on the side away from the second structural member 3, the arm length from the mass block 6 to the elastic member 5 is maximized. According to the following formula for the oscillator resonance frequency f:

[0050]

[0051] Where k is the stiffness of the elastic element, R is the arm length ratio, R = b / c, m t Let c be the mass of the mass block, c be the arm length from the support surface of the elastic plate to the elastic element, and b be the arm length from the mass block to the elastic element. It can be seen that the larger the mass of the mass block and the ratio of the arm length, the smaller the resonant frequency f will be, which will make the high-frequency band gap of the entire structure smaller, thereby expanding the low-frequency band gap and effectively suppressing low-frequency vibration.

[0052] Furthermore, the specific dimensions of the present invention can be as follows: the bottom beam 1 is 2m long, 0.3m wide, and 0.1m high; the first structural member 2 is 1.6m long and 1m high; the distance from the bottom of the first curved groove 21 to the bottom of the first structural member 2 is 0.02m; the elastic member 4 is 0.1m high; the second structural member 3 is 1m high; the elastic plate 5 is 1.35m long and 0.05m thick; and the mass block 6 is 0.25m high. Under these dimensions, a complete bandgap is generated in the bandgap frequency ranges of 0-2.94Hz, 9.85-13.04Hz, 55.18-85.35Hz, 140.15-183.22Hz, and 202.25-283.3Hz. That is, a bandgap of about 53.5% is generated within the low-frequency range of 300Hz, thereby effectively controlling low-frequency vibration.

[0053] In a preferred embodiment of the present invention, damping elements 8 are provided on the bottom of both the first curved groove 21 and the second curved groove 31.

[0054] Specifically, the material density of damping component 8 is 950 kg / m³. 3 The elastic modulus is 5 GPa, the Poisson's ratio is 0.3, the cover thickness is 0.01 m, the cover length is half the length of the bottom curve of the trough, and it is set in the middle of the bottom of the trough.

[0055] In a preferred embodiment of the present invention, the first structural member 2 includes a first sub-structural member 2.1 and a second sub-structural member 2.2, and the first sub-structural member 2.1 and the second sub-structural member 2.1 together form an integral first curved groove 21; the first sub-structural member 2.1 is made of a rigid metal material, and the second sub-structural member 2.2 is made of a rigid non-metallic material.

[0056] Specifically, in steel structure engineering, acoustic black holes are often made of steel. Using other non-metallic materials would result in insufficient strength, making it difficult for those skilled in the art to conceive of using non-metallic materials to make acoustic black holes. The first sub-structural component 2.1 is fixed to the bottom beam 1 by welding, and the second sub-structural component 2.2 is fixed to the bottom beam 1 by adhesive. Due to the significant difference in materials between the first sub-structural component 2.1 and the second sub-structural component 2.2, the transmission of sound waves is affected by different refractions and reflections due to the different media, resulting in impedance mismatch. This is to obtain a wide bandgap in the low-frequency range, thereby effectively controlling the vibration in the frequency range of this bandgap.

[0057] In a preferred embodiment of the present invention, the first substructure 2.1 is made of aluminum and the second substructure 2.2 is made of PMMA.

[0058] Specifically, the first sub-structural component 2.1 is made of aluminum, and the second sub-structural component 2.2 is made of PMMA. In this case, the materials of the first sub-structural component 2.1 and the second sub-structural component 2.2 are significantly different, which causes different refraction and reflection of sound waves due to the different media, resulting in impedance mismatch in order to obtain a wide bandgap in the low frequency range, thereby effectively controlling the vibration in the frequency range of this bandgap.

[0059] In a preferred embodiment of the present invention, the elastic element 4 is epoxy resin.

[0060] Specifically, the epoxy resin has a certain degree of elasticity after curing, which allows the second structural component 3 to be effectively fixed on the bottom beam 1 without affecting its normal vibration.

[0061] In a preferred embodiment of the present invention, the two tops of the first curved groove 21 are flush; the two tops of the second curved groove 31 are flush.

[0062] Specifically, the opening structure of the first curved groove 21 is flush with the horizontal direction along the y-axis, and the opening structure of the second curved groove 31 is flush with the vertical direction along the z-axis. This can fully absorb sound waves and attenuate them evenly, avoiding uneven absorption and affecting sound wave attenuation.

[0063] In a preferred embodiment of the present invention, a pair of vertically arranged support members 7 are further included; a support surface 53 is formed between the suspended portion of the elastic plate 5 and the upper end surface of the second structural member 3; the lower ends of the two support members 7 are fixed on the side wall of the bottom beam 1, and the upper ends are located on both sides of the support surface 53, and are fixed to both sides of the elastic plate 5 to form support.

[0064] Specifically, the upper ends of the two support members 7 are fixed to the outer walls on both sides of the elastic plate 5 in the width direction. The support members 7 can support the elastic plate 5. Since the elastic plate 5 will be subject to vibration, the support members 7 can ensure the strength of the elastic plate 5 and prevent the support surface 53 of the elastic plate 5 from breaking easily.

[0065] In a preferred embodiment of the invention, the mass block 6 is made of lead; the bottom beam 1 is made of steel; and the second structural member 3, the elastic plate 5, and the support member 7 are all made of aluminum.

[0066] Specifically, the lead mass block 6 can effectively move and change its dynamic mass, and the mass block 6 can also be made of other high-density materials; the steel bottom beam 1 can ensure strength; the aluminum second structural component 3, elastic plate 5 and support component 7 can ensure strength, and the aluminum elastic plate 5 has good elasticity.

[0067] In a possible embodiment of the present invention, an acoustic black hole structure component is also provided. According to the acoustic black hole structure described in the above embodiments, in this embodiment, there are multiple bottom beams 1, all coaxially arranged with the y-axis, and each bottom beam 1 is integrally formed along the y-axis. Each bottom beam 1 is provided with a first structural component 2, a second structural component 3, an elastic component 4, an elastic plate 5, a mass block 6, a first curved groove 21, and a second curved groove 31. This embodiment enables the acoustic black hole structures in the above embodiments to be integrally formed, ultimately forming a set. When the size or length of the external support component to be fixed is relatively large, this embodiment can achieve better results. Those skilled in the art can flexibly adjust the number of acoustic black hole structures in a set of acoustic black hole structure components according to actual conditions.

[0068] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. An acoustic black hole structure, characterized in that, include: The bottom beam (1), the first structural component (2), the second structural component (3), the elastic component (4), the elastic plate (5), and the mass block (6) are arranged coaxially with the y-axis in the length direction and are used to fix with the external support component. The first structural member (2) is fixed to one side of the upper surface of the bottom beam (1), and the second structural member (3) is fixed to the other side of the upper surface of the bottom beam (1) by the elastic member (4); The upper surface of the first structural member (2) is provided with a first curved groove (21) that is recessed into the bottom beam (1); both ends of the second structural member (3) in the y-axis direction are provided with a pair of inwardly recessed second curved grooves (31), so that the second structural member (3) has a vertically arranged hourglass structure; the first curved groove (21) and the two second curved grooves (31) constitute three acoustic black holes; A portion of the elastic plate (5) along its length is fixed to the upper end face of the second structural member (3), while the other portion is suspended in the air. The mass block (6) is fixed on the elastic plate (5) on the side away from the second structural member (3). The second structural member (3), the elastic member (4), the elastic plate (5), and the mass block (6) constitute an inertial amplification mechanism to increase the dynamic mass of the mass block (6). The bottom curve h(x) of the first curved groove (21) and the two second curved grooves (31) satisfies the following expression: Where L represents the straight-line distance between the two ends of the groove bottom length direction; for the first structural member (2), h0 represents the straight-line distance from the bottom of the first structural member (2) to the top of the first curved groove (21); for the second structural member (3), h0 represents the straight-line distance from the center line S of the second structural member (3) to the top of the second curved groove (31); for the first structural member (2), h t h represents the straight-line distance from the bottom of the first curved groove (21) to the bottom of the first structural member (2); for the second structural member (3), h t x represents the straight-line distance from the bottom of the second curved groove (31) to the center line S; x is the independent variable of the function.

2. The acoustic black hole structure according to claim 1, characterized in that, Damping elements (8) are provided on the bottom of both the first curved groove (21) and the second curved groove (31).

3. An acoustic black hole structure according to claim 1 or 2, characterized in that, The first structural member (2) includes a first sub-structural member (2.1) and a second sub-structural member (2.2), which together form an integral first curved groove (21); the first sub-structural member (2.1) is made of a rigid metal material, and the second sub-structural member (2.2) is made of a rigid non-metallic material.

4. The acoustic black hole structure according to claim 3, characterized in that, The first substructure (2.1) is made of aluminum, and the second substructure (2.2) is made of PMMA.

5. An acoustic black hole structure according to claim 1, 2, or 4, characterized in that, The elastic element (4) is epoxy resin.

6. An acoustic black hole structure according to claim 1, 2, or 4, characterized in that, The tops of the two grooves of the first curved groove (21) are flush; the tops of the two grooves of the second curved groove (31) are flush.

7. An acoustic black hole structure according to claim 1, 2, or 4, characterized in that, It also includes a pair of vertically arranged support members (7); a support surface (53) is formed between the suspended part of the elastic plate (5) and the upper end surface of the second structural member (3); the lower ends of the two support members (7) are fixed on the side wall of the bottom beam (1), and the upper ends are located on both sides of the support surface (53) and are fixed to the elastic plate (5) to form a support.

8. An acoustic black hole structure according to claim 7, characterized in that, The mass block (6) is made of lead; the bottom beam (1) is made of steel; the second structural member (3), the elastic plate (5) and the support member (7) are all made of aluminum.

9. An acoustic black hole structure according to claim 1, 2, 4 or 8, characterized in that, The elastic plate (5) is arranged parallel to the length direction of the bottom beam (1), the elastic plate (5) is located directly above the bottom beam (1), and the mass block (6) is located directly above the first curved groove (21).

10. An acoustic black hole structure component, characterized in that, According to any one of claims 1 to 9, there are multiple bottom beams (1), all of which are coaxial with the y-axis, and each bottom beam (1) is integrally formed along the y-axis; each bottom beam (1) is provided with the first structural member (2), the second structural member (3), the elastic member (4), the elastic plate (5), the mass block (6), the first curved groove (21), and the second curved groove (31).

Images