Low-frequency vibration reduction variable-thickness wave energy dissipation structure

Abstract

The invention provides a low-frequency vibration reduction variable-thickness wave energy dissipation structure, and belongs to the technical field of ship vibration reduction and noise reduction. The low-frequency vibration reduction variable-thickness wave energy dissipation structure comprises a base panel and a wave energy dissipation assembly, the wave energy dissipation assembly comprises a uniform-thickness plate, a bidirectional variable-thickness plate and a damping plate, the uniform-thickness plate is connected to the base panel, the bidirectional variable-thickness plate is connected to the side plate face of the uniform-thickness plate in the thickness direction, and the damping plate is connected to the side plate face of the uniform-thickness plate in the thickness direction. The top surface of the bidirectional variable-thickness plate is parallel to the top surface of the uniform-thickness plate, the bottom surface of the bidirectional variable-thickness plate comprises two variable-thickness surfaces which are symmetrically arranged along the center line, and the distances between the variable-thickness surfaces and the top surface are gradually reduced in the direction away from the uniform-thickness plate and the direction away from the center line; the damping plate is arranged at the end, away from the uniform-thickness plate, of the top face of the bidirectional variable-thickness plate. And a better vibration reduction effect can be provided while cost and weight are reduced and light weight is met.

Description

Technical Field

[0001] The present invention relates to the technical field of ship vibration reduction and noise reduction, and particularly relates to a low-frequency vibration reduction variable-thickness wave energy dissipation structure. Background Art

[0002] Vibration is a common physical phenomenon in the mechanical field, which usually has an adverse impact on mechanical and electronic devices, thereby reducing the performance and service life of mechanical and electronic devices. Vibration reduction operation is a means to minimize the impact of vibration. For different application fields and occasions, there are various vibration reduction measures. For ships, as large transportation tools, they undertake multiple functions including personnel and material transportation. Vibration reduction for many parts inside ships, especially in places such as mechanical power output, is a major issue, and the vibration requirements must be met according to theoretical and practical requirements as well as ship construction specifications.

[0003] There are many limitations in the current ship vibration reduction and noise reduction technologies, especially in low-frequency vibration reduction control. Vibration reduction control can be mainly divided into two methods: active control and passive control. In terms of active control, although it can effectively control low-frequency vibration, the active control system is quite complex, has poor stability, high cost, large mass, and large occupied space, which leads to many problems in the actual application of ship vibration reduction and noise reduction control. In general, the passive control method is often more selected in normal cases. The most basic form of current passive control is to attach damping materials at the positions where vibration reduction is required to reduce the reflection of elastic bending waves from the free boundary of the structure. For some large underwater vehicles, it is required to cover the entire vibrating surface with damping materials and a considerable thickness is needed, which greatly increases the overall structure mass. Although the effect of vibration reduction and noise reduction can be achieved, it is not conducive to the lightweight of the structure and the low-frequency vibration reduction is limited. Summary of the Invention

[0004] The embodiment of the present invention provides a low-frequency vibration reduction variable-thickness wave energy dissipation structure, which can reduce costs and weights, meet the lightweight requirement, and at the same time provide better vibration reduction effect. The technical solution is as follows: The embodiment of the present invention provides a low-frequency vibration reduction variable-thickness wave energy dissipation structure, including: a base panel and a wave energy dissipation component, The wave energy dissipation component includes a uniform thickness plate, a two-way variable thickness plate, and a damping plate. The uniform thickness plate is connected to the base panel. The two-way variable thickness plate is connected to the side plate surface of the uniform thickness plate in the thickness direction. The top surface of the two-way variable thickness plate is parallel to the top surface of the uniform thickness plate. The bottom surface of the two-way variable thickness plate includes two variable thickness surfaces symmetrically arranged along the midline. In the direction away from the uniform thickness plate and away from the midline, the distance between the variable thickness surface and the top surface gradually decreases. The damping plate is disposed at one end of the top surface of the two-way variable thickness plate away from the uniform thickness plate.

[0005] Optionally, a plurality of the two-way variable thickness plates are provided, and the plurality of two-way variable thickness plates are convexly arranged around the outer contour of the uniform thickness plate.

[0006] Optionally, the thickness of the two-way variable thickness plate satisfies the following formula:

[0007] Wherein, h(x, y) is the thickness at any position on the bottom surface of the two-way variable thickness plate; H is the maximum thickness of the two-way variable thickness plate; L is the length of the two-way variable thickness plate, B is the width of the two-way variable thickness plate; h x is the minimum thickness in the length direction of the two-way variable thickness plate; h y is the minimum thickness in the width direction of the two-way variable thickness plate; m ≥ 2.

[0008] Optionally, the wave energy dissipation component further includes an edge uniform plate. The edge uniform plate is adhesively disposed at one end of the top surface of the two-way variable thickness plate away from the uniform thickness plate, and the damping plate is adhesively attached to the edge uniform plate.

[0009] Optionally, the thickness of the edge uniform plate is less than the minimum thickness of the two-way variable thickness plate.

[0010] Optionally, the top surface of the two-way variable thickness plate is flush with the top surface of the uniform thickness plate.

[0011] Optionally, the uniform thickness plate is detachably connected to the base panel.

[0012] Optionally, a plurality of the wave energy dissipation components are provided, and the plurality of wave energy dissipation components are arranged at intervals on the base panel.

[0013] Optionally, the lengths of the two-way variable thickness plates in at least two wave energy dissipation components are different.

[0014] Optionally, the uniform thickness plate is a fiber reinforced material plate, and the two-way variable thickness plate is a steel plate. The beneficial effects brought by the technical solutions provided in the embodiments of the present invention at least include: By adopting the low-frequency vibration damping variable-thickness wave energy dissipation structure provided in the embodiments of the present invention, a wave energy dissipation assembly composed of a uniformly thick plate, a bidirectionally variable-thickness plate, and a damping plate is arranged at a position with large vibration on the base panel as the controlled object. The uniformly thick plate is in contact with the base panel. By connecting the bidirectionally variable-thickness plate to the side plate surface of the uniformly thick plate and adjusting parameters such as its length, width, and plate thickness relative to the uniformly thick plate, the overall natural frequency of the wave energy dissipation assembly is changed, so as to achieve coupled resonance with the vibration source on the base panel, and cooperate with the damping plate arranged at the edge of the bidirectionally variable-thickness plate to absorb and dissipate the bending low-frequency vibration energy, providing a reference for the passive vibration damping control of the ship. Compared with the form of directly laying damping materials over the entire position to be vibration-damped in the related art, it can greatly reduce the laying amount of damping materials, avoid the limitations of relevant layout positions on the ship, reduce costs and weights, meet the requirements of light weight, and at the same time provide better low-frequency vibration damping effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a three-dimensional structure schematic diagram of the low-frequency vibration damping variable-thickness wave energy dissipation structure provided in the embodiments of the present invention; Figure 2 is a structure schematic diagram of the base panel arranged in the shell model of the power cabin of the underwater vehicle; Figure 3 is a structure schematic diagram of the wave energy dissipation assembly provided in the embodiments of the present invention; Figure 4 is a modal vibration mode diagram of the wave energy dissipation assembly corresponding to the vibration peak frequency of 130 Hz provided in the embodiments of the present invention; Figure 5 is a modal vibration mode diagram of the wave energy dissipation assembly corresponding to the vibration peak frequency of 262 Hz provided in the embodiments of the present invention; Figure 6 is a vibration characteristic diagram of the base panel provided in the embodiments of the present invention; Figure 7 is a vibration characteristic comparison diagram of the base panel after adding the wave energy dissipation assembly provided in the embodiments of the present invention.

[0017] In the figure: 1 - base panel; 2 - wave energy dissipation component; 11 - reinforcing rib; 21 - uniform thickness plate; 22 - double-sided variable thickness plate; 22a - center line; 23 - damping plate; 24 - edge uniform plate; 221 - variable thickness surface; m - shell model; n - supporting I-beam. Detailed implementation manner To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 is a three-dimensional structural schematic diagram of a low-frequency vibration damping variable thickness wave energy dissipation structure provided by an embodiment of the present invention; Figure 2 is a structural schematic diagram of the base panel provided by an embodiment of the present invention disposed in the shell model of the power cabin of an underwater vehicle; Figure 3 is a structural schematic diagram of the wave energy dissipation component provided by an embodiment of the present invention; Figure 4 is a modal vibration mode diagram of the wave energy dissipation component corresponding to the 130 Hz vibration peak frequency provided by an embodiment of the present invention; Figure 5 is a modal vibration mode diagram of the wave energy dissipation component corresponding to the 262 Hz vibration peak frequency provided by an embodiment of the present invention; Figure 6 is a vibration characteristic diagram of the base panel provided by an embodiment of the present invention; Figure 7 is a vibration characteristic comparison diagram of the base panel after adding the wave energy dissipation component provided by an embodiment of the present invention. As Figures 1 to 7 shown, the embodiment of the present invention provides a low-frequency vibration damping variable thickness wave energy dissipation structure, including a base panel 1 and a wave energy dissipation component 2.

[0019] Among them, the wave energy dissipation component 2 includes a uniform thickness plate 21, a double-sided variable thickness plate 22 and a damping plate 23. The uniform thickness plate 21 is connected to the base panel 1, the double-sided variable thickness plate 22 is connected to the side plate surface of the uniform thickness plate 21 in the thickness direction, and the top surface of the double-sided variable thickness plate 22 is parallel to the top surface of the uniform thickness plate 21. The bottom surface of the double-sided variable thickness plate 22 includes two variable thickness surfaces 221 symmetrically arranged along the center line 22a. In the direction away from the uniform thickness plate 21 and in the direction away from the center line 22a, the distance between the variable thickness surface 221 and the top surface gradually decreases, and the damping plate 23 is disposed at one end of the top surface of the double-sided variable thickness plate 22 away from the uniform thickness plate 21.

[0020] In the embodiment of the present invention, the low-frequency vibration damping variable thickness wave energy dissipation structure is used to simulate the passive vibration damping at the corresponding position on an actual ship in a laboratory. As Figure 2As shown in the figure, the base panel 1 is arranged inside the shell model m of the power cabin of the underwater vehicle, and is supported in the middle of the cylindrical shell model m by multiple supporting I-beams n to simulate the environment inside the actual power cabin of the underwater vehicle. The wave energy dissipation component 2 is arranged on one side surface where the base panel 1 is connected to the supporting I-beams n. During the experiment, first, using the ABAQUS software, a low-frequency vibration damping variable-thickness wave energy dissipation structure and an underwater vehicle equipment base structure are established based on the structure of the base panel 1, and the control of the vibration of the base panel 1 by the low-frequency vibration damping variable-thickness wave energy dissipation structure is calculated through frequency response analysis. The vibration response of the base panel 1 is calculated through frequency response analysis to find the peak frequency. Refer to Figure 6 It can be known that the peak vibration frequencies of the base panel 1 are located at 130 Hz, 206 Hz, and 262 Hz respectively. Among them, the area on the base panel 1 where the stiffener 11 is provided corresponding to 206 Hz is not considered. Then, two corresponding wave energy dissipation components 2 are respectively set. The first-order natural frequencies of the two as oscillator structures are close to 130 Hz and 262 Hz, and are respectively set at positions with corresponding peak vibration frequencies. During the experiment, a vertical, single-frequency, unit sine excitation force F is applied at the center of the rectangular area on the upper surface of the base panel 1 to simulate the force exerted on the base panel 1 in the vertical direction when the rotating equipment is working. When the base panel 1 at the corresponding position vibrates, its vibration wave propagates from the uniformly thick plate 21 to the doubly variable-thickness plate 22. The bottom surface of the doubly variable-thickness plate 22 is arranged at intervals with the base panel 1. The bottom surface of the doubly variable-thickness plate 22 includes two variable-thickness surfaces 221 symmetrically arranged along the center line 22a. In the direction away from the uniformly thick plate 21 and in the direction away from the center line 22a, the distance between the variable-thickness surface 221 and the top surface gradually decreases, that is, the thickness gradually thins. At this time, the vibration wave propagates on the doubly variable-thickness plate 22 towards the edge with gradually decreasing thickness. As the thickness of the structure decreases, the wave amplitude increases and the wave speed decreases, and the wave energy finally accumulates in the area with the smallest thickness, that is, the outermost end where the damping plate 23 is provided above. Finally, the wave energy is converted and dissipated through the high impedance performance of the damping plate 23, so as to achieve the effect of vibration reduction and noise reduction and realize good low-frequency vibration suppression. Refer to Figure 7 It can be known that in the embodiment of the present invention, the vibration response of the base panel after installing the low-frequency vibration damping variable-thickness wave energy dissipation structure is calculated through frequency response analysis. For each frequency, the vibration accelerations of all nodes on the base panel 1 are extracted and compared. It can be clearly observed from the vibration characteristic comparison diagram that the maximum values of the vibration accelerations at the peak vibration frequencies of 130 Hz and 262 Hz of the base panel 1 are significantly suppressed, about 22 dB. Further, at the peak vibration frequency of 206 Hz, that is, at the position of the stiffener 11, the maximum value of the vibration acceleration also decreases by 8 dB accordingly.

[0021] By adopting the low-frequency vibration damping variable-thickness wave energy dissipation structure provided by the embodiment of the present invention, a wave energy dissipation component 2 composed of a uniform-thickness plate 21, a bidirectional variable-thickness plate 22, and a damping plate 23 is arranged at a position with large vibration on the base panel 1 as the controlled object. The uniform-thickness plate 21 is in contact with the base panel 1. The bidirectional variable-thickness plate 22 is connected and arranged on the side plate surface of the uniform-thickness plate 21, and by adjusting parameters such as its length, width, and plate thickness relative to the uniform-thickness plate 21, the overall natural frequency of the wave energy dissipation component 2 is changed to achieve coupled resonance with the vibration source on the base panel 1. The damping plate 23 arranged at the edge of the bidirectional variable-thickness plate 22 is cooperated to absorb and dissipate the bending low-frequency vibration energy, providing a reference for the passive vibration damping control of the ship. Compared with the form of directly laying damping materials fully at the position to be vibration-damped in the related technology, it can greatly reduce the laying amount of the damping materials, avoid the limitations of the related layout positions on the ship, reduce costs and weights, meet the lightweight requirement, and provide a better low-frequency vibration damping effect.

[0022] Optionally, a plurality of bidirectional variable-thickness plates 22 are provided, and the plurality of bidirectional variable-thickness plates 22 are convexly arranged around the outer contour of the uniform-thickness plate 21. Exemplarily, in the embodiment of the present invention, according to the vibration peak frequency of the corresponding part on the base panel 1, it is necessary to adjust the parameters such as the length, width, and plate thickness of the bidirectional variable-thickness plates 22 arranged at intervals with the base panel 1 on the wave energy dissipation component 2, as well as the number of the bidirectional variable-thickness plates 22 to adjust its natural frequency for correspondence. For example, in the embodiment as Figure 1 In the example, within each area surrounded by the stiffening rib 11 structure, two wave energy dissipation components 2 are provided. The two wave energy dissipation components 2 are arranged at intervals on the base panel 1, corresponding to the parts with different vibration peak frequencies respectively. Among them, the wave energy dissipation component 2 with a longer length of the bidirectional variable-thickness plate 22 corresponds to the position with a vibration peak frequency of 130 Hz; the wave energy dissipation component 2 with a shorter length of the bidirectional variable-thickness plate 22 corresponds to the position with a vibration peak frequency of 262 Hz. And through the structural vibration response, there are two positions with vibration peak frequencies of 130 Hz and 262 Hz respectively in each area. Therefore, a set of bidirectional variable-thickness plates 22 and damping plates 23 are arranged on each of the opposite sides of the uniform-thickness plate 21 for correspondence.

[0023] It should be noted that Figure 1 The arrangement quantity of the bidirectional variable-thickness plates 22 in the wave energy dissipation component 2 in the example and the side arrangement form relative to the uniform-thickness plate 21 are adaptively arranged according to the position of the vibration peak frequency on the base panel 1. In other possible implementation manners, more wave energy dissipation components 2 can also be provided, or different numbers of bidirectional variable-thickness plates 22 can be arranged on the side of the uniform-thickness plate 21 for coupled resonance.

[0024] Optionally, the thickness of the bidirectional variable-thickness plate 22 satisfies the following formula:

[0025] Among them, h(x, y) is the thickness at any position on the bottom surface of the doubly variable-thickness plate 22; H is the maximum thickness of the doubly variable-thickness plate 22; L is the length of the doubly variable-thickness plate 22, and B is the width of the doubly variable-thickness plate 22; h x is the minimum thickness in the length direction of the doubly variable-thickness plate 22; h y is the minimum thickness in the width direction of the doubly variable-thickness plate 22; m≥2. Exemplarily, in the embodiments of the present invention, based on the rectangular coordinate system described in Figure 3 and according to the installation position of the uniformly thick plate 21 and the position where the vibration peak frequency is located on the base panel 1, the installation position of the damping plate 23 is confirmed. Then, after determining the length and width of the doubly variable-thickness plate 22 connecting the damping plate 23 and the uniformly thick plate 21, taking the length and width directions of the bottom surface of the uniformly thick plate 21 as the x-axis and y-axis directions, the thickness at any position on the bottom surface of the doubly variable-thickness plate 22 can be determined according to this thickness formula. And based on the simulation calculation of the ABAQUS software, when the value of h y is greater than h x , better vibration damping effects can be achieved. The theoretical values of h y and h x are 0, and they are made as thin as possible according to the simulation calculation and processing capabilities to ensure the best vibration damping effects.

[0026] Exemplarily, in the embodiments of the present invention, the structural parameters of the doubly variable-thickness plate 22 are shown in the data table as follows:

[0027] Optionally, the wave energy dissipation component 2 further includes an edge uniform plate 24. The edge uniform plate 24 is attached to one end of the top surface of the doubly variable-thickness plate 22 away from the uniformly thick plate 21, and the damping plate 23 is attached to the edge uniform plate 24. Exemplarily, in the embodiments of the present invention, by attaching an edge uniform plate 24 to one end of the top surface of the doubly variable-thickness plate 22 away from the uniformly thick plate 21 and then arranging the damping plate 23 on the edge uniform plate 24, the vibration waves propagating to the edge of the doubly variable-thickness plate 22 can be accurately concentrated to ensure that the vibration waves can be fully dissipated through the damping plate 23. Its material can be the same as that of the doubly uniform-thickness plate 22, and its own thickness is less than the minimum thickness of the doubly variable-thickness plate 22, only serving as a relay structure for connecting the damping plate 23 and reducing the influence on the overall weight.

[0028] Optionally, the top surface of the two-way variable-thickness plate 22 is flush with the top surface of the uniform-thickness plate 21. Exemplarily, in the embodiment of the present invention, by setting the top surface of the two-way variable-thickness plate 22 to be flush with the top surface of the uniform-thickness plate 21, the maximum thickness range can be provided for the two-way variable-thickness plate 22 within the side plate surface range of the uniform-thickness plate 21 to ensure a larger range of natural frequency changes and further improve the adaptability.

[0029] Optionally, the uniform-thickness plate 21 is detachably connected to the base panel 1. Exemplarily, in the embodiment of the present invention, the wave energy dissipation component 2 is fixed to the position with large vibration of the controlled object through the uniform-thickness plate 21 by using adhesive materials such as glue and bolts. In other possible implementation manners, welding can also be used for fastening, with a simple structure and flexible installation.

[0030] Optionally, the uniform-thickness plate 21 is a fiber-reinforced material plate, and the two-way variable-thickness plate 22 is a steel plate. The uniform-thickness plate 21, as the connection structure between the wave energy dissipation component 2 and the base panel 1, is made of composite materials such as glass fiber or carbon fiber, and is combined and formed with the steel two-way variable-thickness plate 22. On the basis of ensuring mechanical strength, the overall weight is reduced, and the practicality is further improved. In the embodiment of the present invention, the total weight of the wave energy dissipation component 2 in the low-frequency vibration damping variable-thickness wave energy dissipation structure is only 0.4% of the weight of the base panel 1, reducing the influence of the weight of the low-frequency vibration damping variable-thickness wave energy dissipation structure on the vibration performance of the target structure, being easily satisfied for engineering applications, and having the advantages of high efficiency at the same time. Exemplarily, in the embodiment of the present invention, the material parameters of the two-way variable-thickness plate 22 and the damping plate 23 are shown in the data table as follows:

[0031] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the specification and claims of the present invention for patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. The terms such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0032] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-frequency vibration damping variable-thickness wave energy dissipation structure, characterized in that Comprising: A base panel (1) and a wave energy dissipation component (2), The wave energy dissipation component (2) includes a uniform thickness plate (21), a bidirectional variable thickness plate (22) and a damping plate (23). The uniform thickness plate (21) is connected to the base panel (1). The bidirectional variable thickness plate (22) is connected to the side plate surface of the uniform thickness plate (21) in the thickness direction. The top surface of the bidirectional variable thickness plate (22) is parallel to the top surface of the uniform thickness plate (21). The bottom surface of the bidirectional variable thickness plate (22) includes two variable thickness surfaces (221) symmetrically arranged along the center line (22a). In the direction away from the uniform thickness plate (21) and away from the center line (22a), the distance between the variable thickness surface (221) and the top surface gradually decreases. The damping plate (23) is arranged at one end of the top surface of the bidirectional variable thickness plate (22) away from the uniform thickness plate (21).

2. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to claim 1, characterized in that A plurality of the bidirectional variable thickness plates (22) are provided, and the plurality of bidirectional variable thickness plates (22) are arranged convexly around the outer contour of the uniform thickness plate (21).

3. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to claim 1, characterized in that The thickness of the bidirectional variable thickness plate (22) satisfies the following formula: Wherein, h(x, y) is the thickness at any position on the bottom surface of the double-sided variable-thickness plate (22); H is the maximum thickness of the double-sided variable-thickness plate (22); L is the length of the double-sided variable-thickness plate (22), and B is the width of the double-sided variable-thickness plate (22); h x is the minimum thickness in the length direction of the double-sided variable-thickness plate (22); h y is the minimum thickness in the width direction of the double-sided variable-thickness plate (22); m ≥ 2.

4. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to claim 1, characterized in that The wave energy dissipation component (2) further includes an edge uniform plate (24). The edge uniform plate (24) is attached to one end of the top surface of the bidirectional variable thickness plate (22) away from the uniform thickness plate (21), and the damping plate (23) is attached to the edge uniform plate (24).

5. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to claim 4, characterized in that The thickness of the edge uniform plate (24) is less than the minimum thickness of the bidirectional variable thickness plate (22).

6. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to any one of claims 1 to 5, characterized in that The top surface of the bidirectional variable thickness plate (22) is flush with the top surface of the uniform thickness plate (21).

7. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to any one of claims 1 to 5, characterized in that The uniform thickness plate (21) is detachably connected to the base panel (1).

8. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to any one of claims 1 to 5, characterized in that A plurality of the wave energy dissipation components (2) are provided, and the plurality of wave energy dissipation components (2) are arranged at intervals on the base panel (1).

9. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to claim 8, characterized in that The lengths of the bidirectional variable thickness plates (22) in at least two wave energy dissipation components (2) are different.

10. The low-frequency vibration damping variable-thickness wave energy dissipation structure according to any one of claims 1 to 5, characterized in that The uniform thickness plate (21) is a fiber reinforced material plate, and the bidirectional variable thickness plate (22) is a steel plate.

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