A load-bearing, enhanced arched acoustic black hole structure

Abstract

This invention discloses a load-bearing enhanced arched acoustic black hole structure, comprising a gradient section and a uniform section. The gradient section has an arched centerline, which serves as the reference line for the thickness distribution of the gradient section. The thickness profile of the gradient section is formed by offsetting the centerline to both sides along its normal direction, and the thickness is distributed in a power law manner along the extension direction of the centerline, with the power exponent being greater than or equal to 2. The uniform section is disposed at both ends of the gradient section and is transitionally connected to the gradient section along the length direction of the structure. The combination of the arched gradient section and the uniform section improves the load-bearing capacity of the acoustic black hole structure.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction structural technology, specifically to a load-bearing reinforced arched acoustic black hole structure. Background Technology

[0002] Acoustic black hole structures are a type of vibration reduction structure that utilizes a power-law reduction in thickness to create a bending wave velocity gradient, thereby gradually accumulating and absorbing vibrational energy in the thinner region. These structures typically involve thinning plates or beams along their length in a power-law manner, causing the bending wave propagation velocity to decrease with decreasing thickness, thus concentrating and dissipating vibrational energy. Due to their ability to achieve good vibration reduction performance without the need for complex damping structures, acoustic black hole structures have attracted considerable attention in the field of engineering vibration control in recent years.

[0003] However, most existing acoustic black hole structures employ power-law thinning along a straight centerline, inherently resulting in extremely low thickness at the thin-end regions. While the presence of thin ends facilitates vibration energy concentration, it also leads to a significant reduction in local structural stiffness, causing severe deficiencies in the load-bearing capacity of these regions under both static and dynamic loads. This is particularly problematic in load-bearing components such as beams and slabs, where external loads acting at points of abrupt thickness changes can easily cause significant deflection and stress concentration, leading to surface damage, fatigue cracks, and even structural failure. Furthermore, because the thinning direction overlaps with the load-bearing path, the thinned region becomes a weak point in the overall structure, rendering traditional acoustic black hole structures unsuitable for direct application under load-bearing conditions.

[0004] Therefore, how to improve the overall load-bearing capacity of the acoustic black hole structure while maintaining its thinning law and vibration suppression mechanism has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a load-bearing enhanced arched acoustic black hole structure to solve the technical problem of insufficient load-bearing capacity of existing acoustic black hole structures.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] The present invention provides a load-bearing reinforced arched acoustic black hole structure, comprising: a gradient section having an arched center line, the center line serving as a reference line for the thickness distribution of the gradient section, the thickness profile of the gradient section being offset to both sides along the normal direction of the center line, and the thickness being distributed in a power law manner along the extension direction of the center line, with the power exponent being greater than or equal to 2; and a uniform section disposed at both ends of the gradient section and transitionally connected to the gradient section along the length direction of the structure.

[0008] In some embodiments, the centerline is any one or a combination of a power function curve, a circular arc curve, or a catenary curve.

[0009] In some embodiments, the curvature of the centerline changes uniformly from the midpoint of the centerline to both ends.

[0010] In some embodiments, the curvature of the centerline changes continuously along its length.

[0011] In some embodiments, the thickness h(x) of the gradient portion satisfies Where x is the length along the centerline, with the midpoint of the centerline as the zero point; ε is the thickness coefficient, and ε>0. The cutoff thickness is given by m, which is a power exponent and m ≥ 2.

[0012] In some embodiments, cut-off thickness Satisfying Relationships ≥k· Where 0.05≤k≤0.2, This is the reference thickness for the gradient section.

[0013] In some embodiments, the thickness of the uniform portion remains constant along the extension direction.

[0014] In some embodiments, the thickness of the uniform portion is not less than the thickness of the gradient portion and its connection point.

[0015] In some embodiments, the gradient portion and the uniform portion are connected by a linear chamfer or a rounded transition to avoid stress concentration.

[0016] In some embodiments, the reinforced arched acoustic black hole structure further includes a damping layer, which is symmetrically laid on the concave side of the gradient section along the midpoint of the centerline.

[0017] Compared with existing technologies, this invention provides a load-bearing-enhanced arched acoustic black hole structure. By introducing an arched centerline, the thickness distribution of the gradient section varies along the arched direction with continuous curvature, thereby significantly optimizing the load transfer path within the structure. The arched geometry decomposes and disperses external loads along the curved direction, effectively reducing bending stress in the thin-end region and improving the mechanical stability and load-bearing capacity of the thinned area. Simultaneously, the thickness gradually increases along the arched direction according to a power-law relationship, with the power exponent greater than or equal to 2, ensuring that the structure retains the bending wave velocity gradient and energy accumulation mechanism of a traditional acoustic black hole, thus improving load-bearing capacity without sacrificing vibration reduction. Furthermore, the smooth transition between the uniform and gradient sections makes the thickness change more continuous, further reducing the risk of stress concentration at the connection interface. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a load-bearing enhanced arched acoustic black hole structure provided in an embodiment of the present invention;

[0019] Figure 2 This is a deformation and displacement analysis diagram of an arched acoustic black hole structure and a linear acoustic black hole structure provided in an embodiment of the present invention;

[0020] Figure 3 This is a stress analysis diagram of an arched acoustic black hole structure and a linear acoustic black hole structure provided in an embodiment of the present invention;

[0021] Figure 4 This is a vibration analysis diagram of an arched acoustic black hole structure and a beam structure with uniform thickness provided in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Gradient section; 11. Center line; 20. Uniform section; 30. Damping layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] To address the technical problem of insufficient load-bearing capacity in existing acoustic black hole structures, this invention provides a load-bearing enhanced arched acoustic black hole structure device, which can significantly improve load-bearing capacity.

[0026] It should be noted that the load-bearing reinforced arched acoustic black hole structure described in this invention is used, but not limited to, vibration reduction and noise reduction structures. For ease of explanation, this invention only uses the application of a load-bearing reinforced arched acoustic black hole structure to vibration reduction and noise reduction structures as an example. The principle of applying a load-bearing reinforced arched acoustic black hole structure to other types of equipment is essentially the same as that applied to vibration reduction and noise reduction structures, and will not be elaborated here.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of a load-bearing enhanced arched acoustic black hole structure according to an embodiment of the present invention. The structure includes a gradient section 10 and a uniform section 20. The gradient section 10 is used to achieve power-law thinning of the acoustic black hole's thickness, thereby achieving the effect of vibration energy concentration and attenuation. The uniform section 20 is used to bear the horizontal component of the force decomposed by the gradient section 10 under external loads. When the structure is subjected to bending or compression, the load in the gradient section 10 is decomposed along the centerline of the arch, with a portion of the load forming a horizontal component along the length of the structure. This horizontal component is carried and transmitted by the uniform section 20. Therefore, the arched acoustic black hole structure including the gradient section 10 and the uniform section 20 has both vibration reduction and wave-concentrating capabilities, while also enhancing its load-bearing capacity.

[0028] The gradient section 10 has an arched centerline 11. This centerline 11 serves as the geometric reference line for the thickness distribution of the entire gradient section 10. Its shape is composed of an arch with continuous curvature, resulting in a smooth and continuous geometric change in the thickness direction. During the thickness formation process, the arched centerline 11 is offset to both sides along its normal direction to generate the thickness profile of the gradient section 10. The cross-sectional thickness is symmetrical about the center position and gradually increases along the extension direction of the centerline 11 according to a power law relationship, with the power exponent being greater than or equal to 2, to construct the bending wave velocity gradient, thereby concentrating the vibration energy at the center position and further dissipating it.

[0029] The uniform portion 20 is disposed at both ends of the gradient portion 10 to connect the thinned area with the adjacent structural body. The uniform portion 20 achieves a smooth geometric transition with the gradient portion 10 along the length of the structure, so that the thickness change transitions from the power-law thinning area to a structural area that is basically constant and has sufficient load-bearing capacity.

[0030] In this embodiment, by introducing an arched centerline 11 into the acoustic black hole structure, the thickness distribution of the gradient section 10 is no longer thinned along a traditional straight line, but rather forms a geometrically continuous thickness variation trajectory guided by the curvature of the arch. Since the arched centerline 11 can alter the load transfer path within the structure, it decomposes the external load along the curve into axial compressive force and bending components, thereby effectively reducing the peak local bending stress in the thin-end region and improving the mechanical bearing capacity of the thinned area. The introduction of the arched geometry also makes the thickness gradient exhibit a more gradual and dispersed distribution in space, helping to avoid stress concentration caused by abrupt changes in thickness. Simultaneously, the gradient section 10 still follows a power-law relationship in its thickness variation along the arched centerline 11, with the power exponent remaining greater than or equal to 2, allowing the bending wave to still form an effective velocity gradient and energy accumulation effect within the structure, thus maintaining the original vibration reduction characteristics of the acoustic black hole structure.

[0031] Furthermore, in some embodiments, the centerline 11 of the transition section 10 can be selected as any one of a power function curve, a circular arc curve, or a catenary curve, depending on the structural stress requirements and installation space conditions. Alternatively, these curves can be segmented and combined along their length to obtain an arched path that meets different engineering application scenarios. By selecting different types of curves, load transfer paths with different curvature distribution characteristics can be formed within the structure, enabling the transition section 10 to exhibit a more optimized mechanical response when subjected to external loads.

[0032] For example, power function curves have the characteristic that curvature gradually changes along the length direction; that is, the further the curve extends towards both ends, the more significant its offset becomes, making it particularly suitable for the gradual geometric transitions of the transition section 10. When a power function curve is used as the centerline 11, the load can be transmitted along the direction of gradually increasing curvature, thereby effectively weakening the sharp bending effect generated at the ends of the straight black hole structure and reducing the risk of local stress concentration.

[0033] Circular arc curves possess the characteristic of constant curvature, have a simple geometry, and are easy to manufacture with guaranteed precision. When the centerline 11 is circular, the structure can form a uniform and predictable bending path during thickness changes, allowing the load to be distributed along a constant arc trajectory in the transition section, which is beneficial to ensuring the overall mechanical stability of the structure. Especially in scenarios such as continuous beams and frame members where strict control of the load-bearing path is required, the circular arc centerline 11 can provide a highly controllable thinning geometry.

[0034] The catenary curve possesses inherent mechanical equilibrium characteristics, with its curvature varying exponentially along the arc length. This allows for a smoother bending path in the transition section 10, further homogenizing the load distribution. When the catenary is used as the centerline 11, the transition section 10 exhibits a natural force diffusion characteristic under external loads, helping to avoid stress peaks at the ends caused by abrupt changes in thickness. This makes it particularly suitable for applications sensitive to high stress or large deformations.

[0035] Furthermore, depending on the constraints of actual engineering applications, structural shape requirements, or manufacturing process limitations, power function curves, circular arc curves, and catenary curves can be combined as needed. For example, power function segments can be used in thinned areas, circular arc segments in end transition areas, and catenary segments in areas with rapid stress changes, thereby forming a composite arch-shaped centerline 11 with multiple curvature segments. By using different curves or combinations of curves as the centerline 11, the gradient section 10 of this application has higher geometric adjustability and structural adaptability to meet different load environments, spatial layouts, and performance requirements.

[0036] In one embodiment, the curvature of the center line 11 extends from its midpoint to both ends, maintaining a consistent pattern, meaning the center line 11 is symmetrical about its midpoint. This structural arrangement ensures that the curvature of the center line 11 exhibits the same pattern of change on both sides in space, thereby guaranteeing the geometric continuity and symmetry of the overall structure.

[0037] When an external load is applied to the structure, the load transfer path in the thinned region will be distributed along the centerline 11. The fact that the curvature changes in the same way on both sides ensures that the load is transferred along the same geometric trajectory on both sides, thus avoiding problems such as eccentric loading, localized stress concentration, or uneven bending moment distribution caused by geometric asymmetry. In other words, the consistent curvature of the centerline 11 along the symmetrical direction makes the stiffness distribution of the transition section 10 more balanced in different directions, contributing to improved overall stability of the thinned region.

[0038] In one embodiment, the curvature of the centerline 11 varies continuously along its length, meaning there are no geometric broken lines or curvature steps along the entire arched path, making the centerline 11 a smooth curve. By employing such a centerline 11 with continuous curvature, the transition section 10 maintains geometric smoothness as it transitions from the center to both ends, thus avoiding local stress concentration or abrupt load transfer caused by sudden changes in curvature. The continuous change in curvature not only ensures the smoothness of the geometry of the thinned area but also allows external loads to be naturally decomposed and transmitted along the curvature change trend when propagating along the centerline 11, which is beneficial for forming a more stable load-bearing path.

[0039] In terms of mechanical effects, by setting a centerline 11 with continuous curvature, the gradient section 10 can achieve a more reasonable bending stiffness distribution based on the thickness power-law distribution. This ensures that the deformation mode of the structure remains continuous and predictable under load, thereby effectively reducing the peak stress caused by geometric fracture or curvature abrupt changes in the thin-end region. At the same time, the continuity of curvature also makes the path of the vibration energy of the acoustic black hole more smooth when it accumulates along the direction of the centerline 11, preventing abrupt changes in wave impedance caused by geometric discontinuities and ensuring that the vibration reduction characteristics of the structure are maintained.

[0040] Furthermore, in some embodiments, the thickness distribution of the gradient portion 10 satisfies the following power-law relationship: Where x is the length along the center line 11 with the midpoint of the center line 11 as the origin, and the positive and negative directions correspond to the extension directions of the center line 11 to both sides; ε is the thickness coefficient, and ε>0, which is used to adjust the thickness increment of the gradient part 10 along the direction of the center line 11. The cutoff thickness is the minimum thickness of the gradient section 10 at its center position; m is a power exponent, and m≥2, used to control the rate of thickness increase and the steepness of the thinning curve.

[0041] Using the aforementioned power-law expression, the thickness of the gradient section 10 can be made to gradually increase non-linearly with the increase of |x|. Since the power exponent m is not less than 2, the thickness distribution maintains a high degree of thinning near the center region, while the thickness increases rapidly away from the center region, thus forming a significant bending wave velocity gradient inside the structure. This gradient allows the vibration energy generated by external excitation to gradually accumulate towards the center position during propagation, and is ultimately effectively dissipated in the thin-end region, thereby achieving the vibration reduction function of the acoustic black hole.

[0042] Furthermore, by introducing a thickness coefficient ε, the overall thickness variation can be adjusted without changing the power-law form, enabling the structure of this invention to adapt to the needs of different materials, scales, or engineering applications. (Truncation thickness) The design ensures that the thinned area does not approach zero thickness indefinitely, thus guaranteeing that the structure still has the necessary stiffness and load-bearing capacity in the thinned area, avoiding the structural instability or vulnerability caused by excessive thinning at the thin end of traditional acoustic black hole structures.

[0043] For example, in one specific embodiment, a circular arc curve is selected as the centerline 11, with a radius of R = 0.5m and a corresponding central angle of . Therefore, the horizontal projection span of centerline 11 is approximately m. Take =0.0328 , =2mm. The range of x is [- The uniform portion 20 is symmetrically distributed along the center line 11 with the center position as the zero point. The thickness of the uniform portion 20 is set to 20 mm, and the length of the center line 11 on both the left and right sides is approximately 0.2 m.

[0044] Based on this, an arched acoustic black hole structure was constructed, and a traditional linear acoustic black hole structure with the same length and thickness distribution as the centerline 11 was built as a comparison model. Static analysis of the two structures was then performed using finite element method software. Please refer to [link / reference]. Figure 2 and Figure 3 , Figure 2 This is a deformation and displacement analysis diagram of an arched acoustic black hole structure and a linear acoustic black hole structure provided in an embodiment of the present invention; Figure 3 This is a stress analysis diagram of an arched acoustic black hole structure and a straight acoustic black hole structure provided by an embodiment of the present invention. It can be seen that under the same static load, the maximum deformation of the arched acoustic black hole structure in this embodiment is reduced by approximately 86.8% compared to the straight acoustic black hole, and the maximum principal stress is reduced by approximately 38.7%. This indicates that this embodiment effectively improves the stress path in the thinned region by using the arched centerline 11, significantly enhancing the structure's load-bearing capacity.

[0045] In addition, vibration analysis was performed on the arched acoustic black hole structure and the uniform thickness beam structure; please refer to [link to relevant documentation]. Figure 4 , Figure 4 This figure shows vibration analysis diagrams of an arched acoustic black hole structure and a uniform thickness beam structure provided by an embodiment of the present invention. Curve a in the figure represents the vibration curve of the uniform thickness beam structure, and curve b represents the vibration curve of the arched acoustic black hole structure. It can be seen that in the frequency range of 10–1000 Hz, the peak value of the vibration acceleration response of the arched acoustic black hole structure is significantly lower than that of the uniform thickness beam structure, indicating that this embodiment maintains good acoustic black hole vibration reduction characteristics while improving load-bearing performance.

[0046] Furthermore, in some embodiments, the thickness is truncated. Satisfying Relationships ≥k· Where 0.05≤k≤0.2, The reference thickness of the gradient section 10 is used to characterize the typical thickness of the structure when it is located away from the midpoint of the centerline 11. The above relationship defines the lower limit of the minimum thickness of the thinned region, so that the gradient section 10 still retains a certain structural rigidity at the thin end, thereby avoiding problems such as local buckling, fatigue damage, or difficulty in processing due to excessive thinning.

[0047] By cutting off the thickness Set as reference thickness Within a range of 5% to 20%, while maintaining the thickness reduction characteristics required for the acoustic black hole vibration reduction mechanism, the structure can possess the necessary load-bearing capacity and deformation resistance in the thinner central region. Smaller (For example, close to 0.05) The higher the level, the more significant the thinning effect, making it easier for bending wave energy to concentrate at the thinner end, which is beneficial for improving vibration damping performance; while a slightly larger level... (For example, close to 0.2) A higher k-value (at a certain level) can provide higher local stiffness to the structure, making the thinned area less prone to local failure under static or dynamic loads. In engineering applications, an appropriate k-value can be selected within the above range based on factors such as structural load-bearing capacity, material thickness limitations, processing precision, and target vibration attenuation performance, thereby achieving a balance between vibration reduction effect and load-bearing performance.

[0048] In one embodiment, the thickness of the uniform portion 20 remains constant along its extension direction; that is, the region no longer employs a gradually varying thickness or thinning design, but instead has a uniform cross-sectional thickness structure. By using a uniform portion 20 with constant thickness, the horizontal component of the force generated inside the arched gradually varying portion 10 after external loading can be reliably supported and transmitted, forming a stable and reliable force transmission interface between the gradually varying portion 10 and the external structure. When the gradually varying portion 10 generates load decomposition along the arched direction under bending or compression conditions, the horizontal component can be absorbed and transmitted by the uniform portion 20 with high stiffness, ensuring the load-bearing safety of the overall structure.

[0049] The uniform section 20 with constant thickness provides higher bending stiffness and shear resistance, while also bearing the thrust caused by the arched geometry. This ensures that the ends of the tapered section 10 maintain stable boundary conditions under load, reducing the risk of premature plastic deformation or local buckling in the thinned area. In mechanical connections or integral structural fixing methods, the constant thickness region can also serve as a mounting surface or connection interface, giving it greater compatibility in machining and assembly during structural assembly.

[0050] Furthermore, maintaining a constant thickness in the uniform section 20 simplifies the manufacturing process. Compared to the complex machining of the gradient section 10, the constant thickness region is easier to form using conventional processes such as turning, milling, cutting, or molding, thereby reducing manufacturing costs and improving dimensional consistency and processing quality stability. By rationally partitioning the gradient thinning region and the constant thickness region, this embodiment achieves a good balance between material utilization, load-bearing capacity, and the acoustic black hole thinning mechanism, enabling the arched acoustic black hole structure to meet mechanical requirements while still possessing excellent vibration energy concentration characteristics.

[0051] In one embodiment, the thickness of the uniform portion 20 is not less than the thickness of the transition portion 10 and its connection point. That is, at the transition interface between the two, the cross-sectional thickness of the uniform portion 20 remains relatively large, thereby forming a structural shape in which the thickness gradually transitions to the thinning region. Through this thickness relationship, it can be ensured that the uniform portion 20 provides sufficient supporting stiffness in the overall structure, so that external loads are first dispersed and buffered by the thicker uniform portion 20 before being transmitted to the transition portion 10, thereby avoiding the generation of local weak points at the connection point.

[0052] Furthermore, the larger thickness of the uniform portion 20 provides a more reliable connection interface for installation, clamping, or other structural fixing methods, resulting in better assembly convenience and damage resistance in practical engineering applications. For the power-law thinning gradient portion 10, its end thickness is relatively small, while the relatively large thickness of the uniform portion 20 prevents the thinned area from prematurely entering plastic deformation or experiencing local buckling when the structure is subjected to concentrated loads or boundary constraints. By ensuring that the thickness of the uniform portion 20 is not less than the thinning thickness at the connection point, this embodiment provides strong load-bearing support for the overall structure while ensuring the thinned area possesses the necessary flexibility and acoustic energy-concentrating characteristics.

[0053] In one embodiment, a chamfered section or a rounded transition section of a certain length is provided at the interface between the gradient section 10 and the uniform section 20. This allows the thinning thickness of the gradient section 10 to undergo a continuous and smooth thickness change process before entering the uniform section 20, thereby avoiding structural weakening problems caused by abrupt thickness changes. This transition structure can be selected according to actual application requirements and processing methods. Linear chamfers have the advantages of simple structure and convenient processing, while rounded transitions can provide higher geometric continuity and make stress transmission more uniform.

[0054] In this embodiment, by setting a linear chamfer or a circular arc transition surface, the stress concentration caused by abrupt changes in cross-section near the connection interface can be effectively reduced, ensuring a smooth change in stress flow when external loads are transmitted from the uniform part 20 with higher stiffness to the gradually decreasing thickness part 10. A linear chamfer acts as a buffer through a straight thickness transition, allowing local stiffness changes to occur in a predictable manner; while a circular arc transition, due to its continuous curvature characteristics, completely avoids geometrical sharp angles in thickness changes, thus forming a smoother stress gradient and giving the connection area better fatigue resistance under long-term loads.

[0055] Linear chamfers can be easily achieved through conventional milling, grinding, and other processes, making them suitable for applications where structural machining accuracy requirements are relatively low. Circular transitions can be achieved through surface milling or forming processes, providing a higher quality transition interface and offering advantages in applications with higher requirements for surface continuity and structural reliability.

[0056] In one embodiment, the arched acoustic black hole structure further includes a damping layer 30, which is laid on the concave side of the gradient section 10 and symmetrically distributed to both sides with the midpoint of the center line 11 as a reference. Since the gradient section 10 forms a concave curved surface through power-law thinning, this curved surface area is exactly at the main path position where the bending wave energy gathers towards the central region. Placing the damping material on this concave side can make full use of the energy focusing characteristics of the acoustic black hole, so that the vibration energy is effectively dissipated when it propagates to the vicinity of the thin end, thereby further improving the vibration reduction performance of the structure.

[0057] The symmetrical arrangement of the damping layer 30 ensures a balanced mass distribution on both sides of the structure, which helps maintain the dynamic stability of the entire acoustic black hole structure and avoids additional vibration modes or eccentric coupling caused by localized mass imbalance of the damping material. The gradual extension of the damping layer 30 from the midpoint of the centerline 11 to both ends also matches the gradual reduction in thickness, allowing the damping material to cover the area where vibration energy is most concentrated, causing the energy to gradually attenuate during propagation, thereby further reducing vibration response while maintaining load-bearing capacity. In practical engineering applications, the damping layer 30 can be made of various surface-attached damping media such as rubber, polymer composites, and viscoelastic materials, and its specific thickness and coverage length can be flexibly selected based on the target vibration reduction effect, material properties, and processing technology.

[0058] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A load bearing enhanced archway acoustic black hole structure, characterized by, include: The gradient section has an arched center line, which serves as the reference line for the thickness distribution of the gradient section. The thickness profile of the gradient section is formed by offsetting along both sides of the normal direction of the center line, and the thickness is distributed in a power law manner along the extension direction of the center line, with the power exponent being greater than or equal to 2. The uniform portion is disposed at both ends of the gradient portion and is transitionally connected to the gradient portion along the length direction of the structure.

2. The load-enhanced archimedean acoustic black hole structure of claim 1, wherein, The centerline is any one or a combination of a power function curve, a circular arc curve, or a catenary curve.

3. The load-bearing reinforced arched acoustic black hole structure according to claim 1, characterized in that, The curvature of the center line changes uniformly from its midpoint to both ends.

4. The load-bearing reinforced arched acoustic black hole structure according to claim 3, characterized in that, The curvature of the centerline changes continuously along its length.

5. The load-bearing reinforced arched acoustic black hole structure according to claim 3, characterized in that, The thickness h(x) of the gradient section satisfies Where x is the length along the centerline, with the midpoint of the centerline as the zero point; ε is the thickness coefficient, and ε>

0. The cutoff thickness is given by m, which is a power exponent and m ≥ 2.

6. The load-bearing reinforced arched acoustic black hole structure according to claim 5, characterized in that, The cut-off thickness Satisfying Relationships ≥k· Where 0.05≤k≤0.2, The reference thickness is the thickness of the gradient section.

7. The load-bearing reinforced arched acoustic black hole structure according to claim 1, characterized in that, The thickness of the uniform portion remains constant along the extension direction.

8. The load-bearing reinforced arched acoustic black hole structure according to claim 7, characterized in that, The thickness of the uniform portion is not less than the thickness of the gradient portion and the connection point therebetween.

9. The load-bearing reinforced arched acoustic black hole structure according to any one of claims 1 to 8, characterized in that, The gradient section and the uniform section are connected by a linear chamfer or a rounded transition to avoid stress concentration.

10. The load-bearing reinforced arched acoustic black hole structure according to claim 1, characterized in that, The load-bearing reinforced arched acoustic black hole structure also includes a damping layer, which is symmetrically laid on the concave side of the gradient section along the midpoint of the center line.

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