Design method of ship-shaped wave energy dissipation arc plate floating structure and periodic unit structure

Abstract

The invention discloses a ship type wave energy dissipation arc plate floating structure design method and a periodic unit structure, and belongs to the technical field of floating breakwaters, hydrological conditions and ship type characteristic data of a to-be-shielded water area are collected, and the hydrological conditions and ship type characteristic data comprise the navigable water level h, the navigational speed, the ship wave height H, the wave length L and the ship wave direction theta; a periodic unit structure with triple wave-absorbing and energy-dissipating modules is constructed, a plurality of periodic unit structures are connected to form an arc plate floating structure with a rhythm structure, so that phase difference is generated in the propagation process of waves, and the wave propagation path is changed and the energy of the waves is dissipated by utilizing the wave-wave interference effect. The energy dissipation arc plate floating structure is good in energy dissipation effect, the modular design of the periodic unit structure provides high flexibility, construction convenience and expandability, and the structural layout can be rapidly adjusted according to actual needs. The arc-shaped plates are sequentially connected to form a rhythm type structure, the structure is simple, the appearance is attractive, the material consumption can be reduced by using the hollow plates, and the cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of floating breakwaters and is used for river, lake and coastal protection projects. In particular, it relates to a design method for a ship-shaped wave energy dissipation and wave elimination arc plate floating structure and a periodic unit structure. Background Art

[0002] A ship wave refers to a wave generated on the water surface when a ship is running on the water surface. It displaces the water on both sides, resulting in changes in flow velocity and pressure, thereby generating a wave on the water surface. Ship waves mainly gather on the water surface and propagate directionally, usually along the direction of the ship's travel, and gradually attenuate during propagation. Ship waves will have a direct impact and erosion on the coast and river channels. In the river channels densely covered with mangroves, ship waves will have a greater impact on the mangroves. Mangroves have various ecological functions, can purify water areas, maintain biodiversity, provide a place for the growth and reproduction of many fish, shrimps, crabs and shellfishes, and are also important habitats and migration transfer stations for water birds and migratory birds. Constructing a breakwater is the most effective and direct method to reduce the impact of ship waves on mangroves.

[0003] Since floating breakwaters can adapt to situations such as large water depths, soft foundations, large tidal differences and the introduction of water body exchange, are not restricted by foundation conditions, can be used in a variety of water environments, have less impact on sediments and the ecological environment, are more environmentally friendly, and are convenient for construction. At the same time, due to their floating body structure, floating breakwaters have good mobility and can be quickly deployed as temporary buildings when needed. Therefore, they are attracting more and more attention in this field. Especially in the river channels densely covered with mangroves, which are mainly affected by ship waves and the wave energy is mainly concentrated on the water surface, it is more suitable to use floating breakwaters for protection.

[0004] Existing research shows that floating breakwaters have a good wave dissipation effect on short-period waves, but there is little research on the wave dissipation effect on ship waves. Therefore, it is very important to study and develop floating breakwaters that can provide excellent shelter effects under the action of ship waves. It is still in its infancy in terms of structural form, wave dissipation mechanism, design and engineering applications. Therefore, how to invent a floating breakwater with a universal energy dissipation and wave elimination arc plate floating structure under ship waves according to different water environment characteristics and reveal its wave dissipation mechanism under ship waves is an urgent problem to be solved at present.

[0005] The document with the publication number CN118127979A provides an ecological floating wave-dissipating device and an assembly method for an ecological waterway, including a floating guide pile fixing module I, a plant floating wave-dissipating module II, a power floating wave-dissipating module III, and a connection module IV. The floating guide pile fixing module includes a foundation block and a telescopic guide pile. The foundation block is used to be fixed at the bottom of the ecological waterway. One end of the telescopic guide pile is arranged at the side of the cross support on the foundation block, and the other end is connected to the telescopic guide pile floating box. The telescopic guide pile floating box floats on the water surface, and the telescopic guide pile can expand and contract with the change of water level. The plant floating wave-dissipating module includes a wave-dissipating floating body, a nutrient solution through member, and an aquatic plant fixing plate. The wave-dissipating floating body dissipates waves while floating on the water surface. The nutrient solution through member is arranged inside the wave-dissipating floating body. The aquatic plant fixing plate is arranged on the top of the nutrient solution through member and is used to fix ecological plants. The power floating wave-dissipating module includes a wave-dissipating floating body, a nutrient solution conveying member, and a power assembly. This device has many structural components and also has a plant floating module, with complex operation and maintenance and poor practicability. The document with the publication number CN115369820 discloses a ship wave energy dissipation device applicable to an ecological waterway, including a fountain pillar 100, a wave-dissipating mechanism 200, and an automatic water replenishing fountain mechanism 300. A rectangular wave-dissipating outer frame 210 is arranged on the outer peripheral side between the lower support plate 111 and the upper support plate 112. A rectangular wave-dissipating inner frame 220 is located inside the rectangular wave-dissipating outer frame 210, and a sliding fit is formed between the front and rear outer side surfaces of the rectangular wave-dissipating inner frame 220 and the front and rear inner side surfaces of the rectangular wave-dissipating outer frame 210. Two front and rear inner frame chutes 221a, 221b are arranged at intervals along the length direction on the front and rear frame bars of the rectangular wave-dissipating inner frame 220. One end of each of the front and rear sliding connecting rods 230a, 230b is fixedly connected to the front and rear inner side surfaces of the rectangular wave-dissipating outer frame 210, and the other end correspondingly passes through the front and rear inner frame chutes 221a, 221b and is fixedly connected to the front and rear connection blocks 113a, 113b. Of course, the number of the front and rear sliding connecting rods 230a, 230b is not limited to the number in this embodiment and should be set according to design requirements. A number of front and rear wave-dissipating components 240a, 240b are installed at intervals along the length direction on the front and rear frame bars of the rectangular wave-dissipating outer frame 210. This device has many moving parts, a complex structure, poor stability, and a high operation and maintenance cost. Summary of the Invention

[0006] In view of the above problems, the present invention proposes a design method for a ship-shaped wave energy dissipation and wave-dissipating arc plate floating structure and a periodic unit structure, aiming to adopt the wave modulation theory and utilize the wave interference effect to construct a general design method for a ship wave energy dissipation and wave-dissipating arc plate floating structure and a periodic unit structure under different water area conditions, with good wave dissipation and energy dissipation effects, modular design, beautiful appearance, simple structure, flexible and convenient construction, and expandability.

[0007] The present invention is implemented as follows:

[0008] On the one hand, the present invention provides a design method for a ship-shaped wave energy dissipation and wave elimination arc plate floating structure, which constructs a periodic unit structure with a triple wave elimination and energy dissipation module, and a plurality of periodic unit structures are connected to form an arc plate floating structure with a rhythm structure. The method steps include:

[0009] Step 1: Collect the hydrological conditions and ship type characteristic data of the sea area to be protected, including the navigable water level h, the ship speed, the wave height H of the ship traveling wave, the wavelength L, and the wave direction θ of the ship traveling wave;

[0010] Step 2: Determine the size parameters and layout of the arc plate floating structure, which is composed of a plurality of periodic unit structures;

[0011] Step 3: Determine the periodic unit structure and layout. The outside of each periodic unit structure is composed of a plurality of arc-shaped perforated plates with the same structure, and the inside is a cuboid wave elimination cavity containing n layers of wave elimination perforated partitions, where n≥1. A plurality of the same arc-shaped perforated plates are evenly arranged on the outer surface of the cuboid wave elimination cavity. The outer surface at least includes the front, bottom, and top. The arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N≥3. The length r of the line connecting the cross-section endpoints A and C of the arc-shaped perforated plate arranged on the cuboid wave elimination cavity satisfies the following formula with the wave direction θ of the ship traveling wave and the main wavelength L:

[0012]

[0013] In the formula, ε1 = 1, 2, 3…, ε1 represents the diffraction secondary, taking a positive number. The straight line AB or BC formed by the vertex B of the cross-section of the arc-shaped perforated plate to the endpoint A or C is perpendicular to the wave direction θ of the ship traveling wave.

[0014] Furthermore, the vertical height m of the arc plate floating structure is 2 - 4 times the wave height H of the ship traveling wave.

[0015] Furthermore, the length a of the periodic unit structure and the number N of the arc-shaped perforated plates need to satisfy the following formula:

[0016] Nr = a.

[0017] Furthermore, the upper, lower, front, and rear four surfaces of the cuboid wave elimination cavity are rectangular perforated plates, and the left and right two side surfaces are square perforated plates.

[0018] Furthermore, the n layers of wave elimination perforated partitions are 2 layers, and are arranged equidistantly in the cavity of the cuboid wave elimination cavity.

[0019] Furthermore, the arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N = 4.

[0020] Furthermore, the outer surface includes the front, bottom, top, and rear.

[0021] On the other hand, the present invention provides a ship-shaped wave energy dissipation and wave elimination arc plate floating periodic unit structure. The outside of each periodic unit structure is composed of a plurality of arc-shaped perforated plates with the same structure, and the inside is a cuboid wave elimination cavity containing n layers of wave elimination perforated partitions, where n ≥ 1. The plurality of arc-shaped perforated plates with the same structure are uniformly arranged on the outer side surface of the cuboid wave elimination cavity. The outer side surface at least includes the front, bottom, and top surfaces. The arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N ≥ 3. The length r of the connection line between the cross-section endpoints A and C of the arc-shaped perforated plate arranged on the cuboid wave elimination cavity, the wave direction θ of the ship wave, and the main wavelength L satisfy the following formula:

[0022]

[0023] In the formula, ε1 = 1, 2, 3…, ε1 represents the diffraction secondary, taking positive integers. The length a of the arc plate floating unit structure and the number N of the arc-shaped perforated plates need to satisfy: Nr = a.

[0024] Further, the upper, lower, front, and rear four surfaces of the cuboid wave elimination cavity are rectangular perforated plates, and the left and right two side surfaces are square perforated plates.

[0025] Further, the n layers of wave elimination perforated partitions are 2 layers, and are arranged at equal distances in the cavity of the cuboid wave elimination cavity.

[0026] The beneficial effects of the present invention are:

[0027] (1) The present invention constructs a periodic unit structure with a triple wave elimination and energy dissipation module, which is equivalent to being composed of triple wave elimination modules. First, when the wave travels to the arc-shaped perforated plate, the two interact to generate wave breaking and produce the first wave elimination effect; secondly, using the wave modulation theory, the arc-shaped plates are connected in sequence to form a rhythm structure, and the wave propagation path is changed by the wave interference effect to achieve efficient wave reflection, reduce the wave transmittance, and produce the second wave elimination effect; finally, the cuboid wave elimination cavity composed of rectangular perforated plates, where the wave moves back and forth, generates energy dissipation and produces the third wave elimination effect, and the elimination rate can reach 60% - 75%.

[0028] (2) The modular design of the energy dissipation and wave elimination arc plate floating structure periodic unit structure of the present invention provides high flexibility, construction convenience, and scalability for building breakwaters, and can quickly adjust the structure layout according to actual needs. At the same time, the convenience of construction and maintenance is also improved, enabling the structure to be quickly deployed and adjusted to adapt to changing river, lake, and ocean environments and requirements. In addition, the structure design takes into account both environmental protection and economic benefits, and adapts to different water environments through customized design, with strong practicability.

[0029] (3) The arc-shaped plates are connected in sequence to form a rhythmic structure, which is simple in structure and beautiful in appearance. The use of hollow plates can also reduce the amount of materials used and lower costs.

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0031] Figure 1 is a three-dimensional schematic diagram of the periodic unit structure of the floating structure of the present invention;

[0032] Figure 2 is a front view structural schematic diagram of the present invention;

[0033] Figure 3 is a top view structural schematic diagram of Embodiment 3 of the present invention;

[0034] Figure 4 is a right side view structural schematic diagram of Embodiment 3 of the present invention;

[0035] Figure 5 is a schematic diagram of the relationship between the wave direction θ of the ship traveling wave and the position of the arc plate floating structure of the present invention;

[0036] Figure 6 is the wave dissipation effect diagram of the arc plate floating structure of the present invention.

[0037] In the figure, 1 is the periodic unit structure, 2 is the wave dissipation cavity, 21 is the square perforated plate, 22 is the rectangular perforated plate, 23 is the wave dissipation perforated partition plate, and 3 is the arc-shaped perforated plate. Specific Embodiments

[0038] Embodiment 1:

[0039] This embodiment is a design method for a ship-shaped wave energy dissipation and wave dissipation arc plate floating structure. As Figures 1 to 6 shown, a periodic unit structure 1 with a triple wave dissipation and energy dissipation module is constructed. Multiple periodic unit structures 1 are connected to form an arc plate floating structure, including: First, a plurality of arc-shaped perforated plates 3 are arranged on the outer side of the periodic unit structure 1, and the waves interact when they reach the arc-shaped perforated plates 3, breaking the waves; Second, using the wave modulation theory, the arc-shaped perforated plates 3 are connected in sequence and combined to form a rhythmic structure, so that a phase difference occurs during the propagation of the waves, and the wave propagation path is changed by the wave interference effect; Third, a cuboid wave dissipation cavity 2 composed of perforated plates is constructed inside the periodic unit structure 1, so that the waves move back and forth therein, further dissipating the energy of the waves.

[0040] The method includes the following steps:

[0041] Step 1, collect the hydrological conditions and ship type characteristic data of the proposed protected sea area, including the designed navigable water level h and the ship speed V s, the wave height H, wavelength L and wave direction θ of the ship traveling wave.

[0042] Step 2, determine the size parameters and layout of the arc plate floating structure. The arc plate floating structure is formed by connecting multiple periodic unit structures 1. The vertical height m of the arc plate floating structure is 2 - 4 times the wave height H of the ship traveling wave.

[0043] Step 3, determine the periodic unit structure 1 and layout. Outside each periodic unit structure 1 are multiple arc-shaped perforated plates 3 with the same structure, and inside is a cuboid wave-dissipating cavity 2 containing n layers of wave-dissipating perforated partitions 23, where n ≥ 1. The multiple arc-shaped perforated plates 3 with the same structure are evenly arranged on the outer side surface of the cuboid wave-dissipating cavity 2. The outer side surface at least includes the lower, upper, and front surfaces facing the waves. The arc-shaped perforated plates 3 on each surface are closely connected to form N arched protrusions, with the bottom surfaces on a horizontal line, and an orderly undulating wavy surface is formed above. N ≥ 3. Preferably in this embodiment, the outer side surface includes the front, lower, and upper surfaces, and the number N of arc-shaped perforated plates 3 on each surface is 4.

[0044] The length r of the line connecting the cross-section endpoints A and C of the arc-shaped perforated plate 3 provided on the cuboid wave-dissipating cavity 2 satisfies the following formula with the ship traveling wave direction θ and the main wavelength L:

[0045]

[0046] In the formula, ε1 = 1, 2, 3…, ε1 represents the diffraction secondary, and positive numbers are taken.

[0047] The straight line AB or BC formed by the vertex B of the cross-section of the arc-shaped perforated plate 3 to the endpoint A or C is perpendicular to the ship traveling wave direction θ.

[0048] Preferably, in this embodiment, the upper, lower, front, and rear four surfaces of the cuboid wave-dissipating cavity 2 are rectangular perforated plates 22, and the left and right two side surfaces are square perforated plates 21. The multiple periodic unit structures 1 are sequentially and closely connected through the square perforated plates 21 to form the arc plate floating structure. The length a of the periodic unit structure 1 and the number N of the arc-shaped perforated plates 3 need to satisfy: Nr = a.

[0049] Embodiment 2:

[0050] This embodiment is a ship-shaped wave energy dissipation and wave elimination arc plate floating periodic unit structure. Based on the above-mentioned arc plate floating structure design method, the outer side of each periodic unit structure is composed of multiple arc-shaped perforated plates 3 with the same structure, and the inner side is a cuboid wave elimination cavity 2 containing n layers of wave dissipation perforated partitions, where n≥1. The multiple arc-shaped perforated plates 3 with the same structure are evenly arranged on the outer side surface of the cuboid wave elimination cavity 2. The outer side surface at least includes the front, bottom, and top surfaces. The arc-shaped perforated plates 3 on each surface are closely connected to form N arched protrusions, where N≥3. The length r of the connection line between the cross-section endpoints A and C of the arc-shaped perforated plate 3 arranged on the cuboid wave elimination cavity 2, the ship traveling wave direction θ, and the main wavelength L satisfy the following formula:

[0051]

[0052] In the formula, ε1 = 1, 2, 3…, ε1 represents the diffraction secondary, taking positive integers. The length a of the arc plate floating unit structure and the number N of the arc-shaped perforated plates 3 need to satisfy: Nr = a.

[0053] Preferably, in this embodiment, the upper, lower, front, and rear four surfaces of the cuboid wave elimination cavity 2 are rectangular perforated plates, and the left and right two side surfaces are square perforated plates 21. The wave dissipation perforated partitions 23 are equally spaced and arranged in 2 layers inside the cuboid wave elimination cavity 2.

[0054] Embodiment 3:

[0055] Based on the above embodiment, this embodiment is an improvement on the installation position of the arc-shaped perforated plate 3. In this embodiment, the arc-shaped perforated plates 3 are arranged on the upper, lower, front, and rear four outer side surfaces of the cuboid wave elimination cavity 2. The layout, structure, and size of the arc-shaped perforated plates 3 on the four outer side surfaces are the same. Arranging the arc-shaped perforated plates 3 on all four sides has a better wave elimination and energy dissipation effect, as Figures 3-4 shown.

[0056] Embodiment 4:

[0057] This embodiment is a specific example, collecting the hydrological conditions and ship type characteristic data of the proposed protected sea area:

[0058] The hydrological conditions of the proposed protected sea area include: the designed navigable water level is 3.6m, the wave height H of the ship traveling wave is 0.353m, the wavelength L is 7.54m, and the ship traveling wave direction θ is 35.14°.

[0059] Step 2, determine the size parameters and layout of the periodic unit structure of the arc plate floating structure:

[0060] The arc plate floating structure is formed by connecting multiple periodic unit structures 1. Each of the periodic unit structures 1 consists of two parts: a plurality of arc-shaped perforated plates 3 with the same structure and a cuboid wave-dissipating cavity 2. The four upper, lower, front, and rear faces of the cuboid wave-dissipating cavity 2 are rectangular perforated plates 22, and the left and right faces are square perforated plates 21. Two layers of wave-dissipating perforated partitions 23 are provided, and the two layers of the perforated partitions 23 can be placed vertically or horizontally. In this embodiment, they are placed vertically at equal distances, as Figures 1-4 shown.

[0061] Preferably, in this embodiment, the number of arc-shaped perforated plates 3 of the periodic unit structure 1 is 12, with the same structure, shape, and size. They are respectively arranged on the upper, lower, and front three faces of the cuboid wave-dissipating cavity 2, and 4 (N = 4) arc-shaped perforated plates 3 are arranged on each face. And they are closely connected in sequence along the cuboid wave-dissipating cavity 2. The chords AC of all the arc-shaped perforated plates 3 are on the same straight line and are connected to the cuboid wave-dissipating cavity 2. The arc-shaped perforated plates 3 on the lower surface of the cuboid wave-dissipating cavity 2 are symmetrically arranged with the arc-shaped perforated plates 3 on the upper surface. The straight line AB or BC formed by the center point (vertex) B of the arc cross-section of the arc-shaped perforated plate 3 to the end point A or C is perpendicular to the wave direction θ of the ship traveling wave, as Figures 1 to 5 shown.

[0062] Since the energy of the ship traveling wave is mainly concentrated on the water surface, in this embodiment, the multiple relationship between the vertical height m of the periodic unit structure 1 and the wave height H of the ship traveling wave is calculated as 4 times, m = 4H = 4 * 0.353 = 1.41m. According to the hydrological conditions of the intended protected sea area, the ship type characteristic data, and the relationship between the straight line BD in the arc-shaped perforated plate 3 and the height b of the cuboid wave-dissipating cavity 2, an energy-dissipating and wave-dissipating arc plate floating structure suitable for the range of the intended protected sea area is finally designed.

[0063] Figure 5 Schematic diagram of the relationship between the wave direction θ of the ship traveling wave and the position of the arc plate floating structure in the present invention. In this embodiment, the ship type characteristic data shows that the wavelength L of the ship traveling wave is 7.54m and the wave direction θ of the ship traveling wave is 35.14°. For the convenience of calculation, 35° is taken here and substituted into the following formula:

[0064]

[0065] Since the navigable water level is relatively shallow in this embodiment, h = 3.6m and r should not be too long, so ε1 is taken as 10, and it can be calculated that r is 0.46m (rounded to two decimal places).

[0066] According to the design scheme, the ship traveling wave is perpendicular to the connection line between the vertex B of the cross-section of the arc-shaped perforated plate 3 and an end point A, that is:

[0067] ∠BAD = 180° - 90° - 35° = 55°,

[0068] According to the trigonometric function tanθ = BD / AD, it is calculated that the straight line BD is 0.33 m. The height b of the cuboid wave-dissipating cavity 2 is b = m - BD×2 = 1.41 - 0.33×2 = 0.75 m.

[0069] The length a of the cuboid wave-dissipating cavity 2 is a = Nr = 4×0.46 = 1.84 m, that is, the length of each periodic unit structure 1 is 1.84 m.

[0070] The summary data of the periodic unit structure in this embodiment are as follows: the vertical height m = 1.41 m, the number of arc-shaped perforated plates 3 is 3N = 3×4 = 12, the wavelength L of the ship traveling wave is 7.54 m, and the wave direction θ of the ship traveling wave is 35.14°; the length a of the periodic unit structure 1 is 1.84 m, the height b of the cuboid wave-dissipating cavity 2 is 0.75 m, the height BD of the arc-shaped perforated plate 3 is 0.33 m, and the width r is 0.46 m.

[0071] In this embodiment, the ship model is scaled according to the scale of a 5000 DWT bulk carrier, with a scaling ratio of 1:10. The size of the ship model is 7 m×1.5 m. The experimental set ship speed is 1.35 m / s, and the experiment is carried out under the water depth condition of 1.13 m to study the wave-dissipating characteristics of the wave-dissipating structure. Through the experiment, the effective energy dissipation rate of the wave-dissipating structure is 60% - 75%.

[0072] Figure 6 It is the wave-dissipating effect diagram of the energy-dissipating and wave-dissipating arc plate floating structure obtained by the design method of the present invention. In the figure, the black part represents the arc plate floating structure of the present invention. The linear shape in front of it (left side) is the change state of the ship traveling wave height, and the linear shape state behind it (right side) represents the ship traveling wave state after passing through the arc plate floating structure of the present invention. It can be seen from the figure the change of the free surface height of the wave. The free surface height difference behind the energy-dissipating and wave-dissipating arc plate floating structure (right side) becomes significantly smaller, and the fluctuation becomes stable, indicating that the wave energy is significantly reduced, achieving the effect of covering the rear, and can effectively protect the mangrove vegetation belt.

[0073] The present invention constructs a periodic unit structure 1 with a triple wave-dissipating and energy-dissipating module. Multiple periodic unit structures 1 are connected to form a new type of arc plate floating structure with a rhythm structure, so that the waves generate a phase difference during the propagation process, and the wave propagation path is changed by the wave interference effect, and the effective energy dissipation rate can reach 60% - 75%. At the same time, a high-strength, lightweight and corrosion-resistant material is used. According to the actual application water area, it can be flexibly spliced and the structure layout can be quickly adjusted, with construction convenience and scalability to adapt to the changing water environment and requirements. The design of the perforated plate can reduce the material use and lower the cost.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention (such as the sequence of steps, the deformation of the cycle unit structure, etc.) can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A design method for a floating structure with a ship-shaped wave energy dissipation and wave elimination arc plate, characterized in that Construct a periodic unit structure with a triple wave-dissipating and energy-dissipating module, and connect multiple said periodic unit structures to form an arc-shaped floating structure with a rhythmic structure. The method steps include: Step 1: Collect the hydrological conditions and ship type characteristic data of the sea area to be protected, including the navigable water level h, the ship speed, the wave height H of the ship-generated wave, the wavelength L, and the wave direction θ of the ship-generated wave. Step 2: Determine the dimensional parameters and layout of the arc-shaped floating structure, which is composed of multiple periodic unit structures. Step 3: Determine the periodic unit structure and layout. The outside of each periodic unit structure is composed of multiple arc-shaped perforated plates with the same structure, and the inside is a cuboid wave-dissipating cavity containing n layers of wave-dissipating perforated partitions, where n≥1. The multiple arc-shaped perforated plates with the same structure are evenly arranged on the outer surface of the cuboid wave-dissipating cavity. The outer surface at least includes the front, bottom, and top. The arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N≥3. The length r of the connection line between the cross-section endpoints A and C of the arc-shaped perforated plate arranged on the cuboid wave-dissipating cavity, the wave direction θ of the ship-generated wave, and the main wavelength L satisfy the following formula: In the formula, ε1 = 1, 2, 3..., ε1 represents the diffraction secondary, and positive numbers are taken.

2. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to claim 1, characterized in that, The vertical height m of the arc-shaped floating structure is 2 - 4 times the wave height H of the ship-generated wave.

3. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to claim 1, characterized in that, The length a of the periodic unit structure and the number N of the arc-shaped perforated plates need to satisfy the following formula: Nr = a.

4. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to claim 1, characterized in that, The upper, lower, front, and rear four surfaces of the cuboid wave-dissipating cavity are rectangular perforated plates, and the left and right two side surfaces are square perforated plates.

5. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to claim 1, characterized in that, The n layers of wave-dissipating perforated partitions are 2 layers, and are arranged at equal distances in the cavity of the cuboid wave-dissipating cavity.

6. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to claim 1, characterized in that The arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N = 4.

7. The design method of the ship-shaped wave energy dissipation and wave elimination arc plate floating structure according to any one of claims 1-6, characterized in that, The outer surface includes the front, bottom, top, and rear.

8. A ship-shaped wave energy dissipation and wave elimination arc plate floating periodic unit structure, based on the arc plate floating structure design method described in claim 1, characterized in that, The outside of each periodic unit structure is composed of multiple arc-shaped perforated plates with the same structure, and the inside is a cuboid wave-dissipating cavity containing n layers of wave-dissipating perforated partitions, where n≥1. The multiple arc-shaped perforated plates with the same structure are evenly arranged on the outer surface of the cuboid wave-dissipating cavity. The outer surface at least includes the front, bottom, and top. The arc-shaped perforated plates on each surface are closely connected to form N arched protrusions, where N≥3. The length r of the connection line between the cross-section endpoints A and C of the arc-shaped perforated plate arranged on the cuboid wave-dissipating cavity, the wave direction θ of the ship-generated wave, and the main wavelength L satisfy the following formula: In the formula, ε1 = 1, 2, 3..., ε1 represents the diffraction secondary, and positive integers are taken. The length a of the arc-shaped floating unit structure and the number N of the arc-shaped perforated plates need to satisfy: Nr = a.

9. The floating periodic unit structure of the ship-shaped wave energy dissipation and wave elimination arc plate according to claim 8, characterized in that, The upper, lower, front, and rear four surfaces of the cuboid wave-dissipating cavity are rectangular perforated plates, and the left and right two side surfaces are square perforated plates.

10. The ship-shaped wave energy dissipation and wave elimination arc plate floating periodic unit structure according to claim 8, characterized in that, The n layers of wave-dissipating perforated partitions are 2 layers, and are arranged at equal distances in the cavity of the cuboid wave-dissipating cavity.

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