Design method, structure and application of ship wave tip ridge plate floating breakwater

Abstract

The invention discloses a design method, structure and application of a ship wave sharp ridge plate floating breakwater, and the design method comprises the following steps: collecting basic data, determining the periodic unit structure and layout of the ship wave sharp ridge plate floating breakwater, determining the size parameters of the ship wave sharp ridge plate floating breakwater, and determining the size parameters of the ship wave sharp ridge plate floating breakwater. And finally, the ship wave sharp ridge plate floating breakwater suitable for the water area range to be shielded is obtained through design. By applying the wave modulation theory, innovation of the river and coast protection technology is achieved, the energy dissipation and wave absorption efficiency is remarkably improved, meanwhile, environmental friendliness and economical efficiency are considered, the mangrove forest vegetation zone is protected through the structural design, and cost is reduced. In addition, the flexibility of the structure and the construction convenience are enhanced through the modular and customized design method, different water area environments and requirements are allowed to be rapidly adapted, and an efficient, environment-friendly and economical solution is provided for river and coast protection.

Description

Technical Field

[0001] The present invention belongs to the technical field of floating breakwaters, and particularly relates to a design method, structure and application of a ship wave crest plate floating breakwater. Background Art

[0002] Floating breakwaters can adapt to situations such as large water depths, soft foundations, large tidal differences, and introduction of water body exchange. This means they can be used in a variety of environments without being restricted by foundation conditions. Floating breakwaters have less impact on sediments and the ecological environment, being more environmentally friendly. Moreover, due to their floating body structure, floating breakwaters have good mobility and can be quickly deployed as temporary structures when needed. Especially within the range of river channels densely covered with mangroves, the waves are small, and the mangroves are mainly affected by ship waves. The wave energy is mainly concentrated on the water surface. In such a situation, building a floating breakwater with high energy dissipation efficiency is more cost-effective. Therefore, floating breakwaters have the characteristics of economy, ecology, and convenient construction, and have a very broad development prospect.

[0003] Existing research shows that floating breakwaters have a good wave dissipation effect on short-period waves, but there are few research results on the wave dissipation effect of ship waves. Therefore, it is very important to research and develop a new type of floating breakwater that can provide excellent shielding effect under the action of ship waves. There are numerous river channels in our country, the shipping industry is developed, and the ship types are diverse. Building highly efficient floating breakwaters faces huge challenges. It is still in its infancy in terms of new structural forms, wave dissipation mechanisms, as well as design and engineering applications.

[0004] Therefore, how to invent a ship wave floating breakwater with universality under ship waves aiming at different environmental characteristics, reveal its wave dissipation mechanism under ship waves, improve the wave dissipation efficiency of the ship wave floating breakwater, and further improve the modulation effect of the ship wave floating breakwater on waves is an urgent problem to be solved at present. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a design method, structure and application of a ship wave crest plate floating breakwater. By using the wave modulation theory, the energy dissipation and wave elimination crest plate floating structure of the present invention has a special structure with triple wave elimination combinations. By using the wave interference effect to change the wave propagation path, efficient wave reflection is achieved, the wave transmission rate is reduced, the wave energy is dissipated, and design modularization is realized. The construction is flexible and convenient and is easy to expand.

[0006] The present invention is implemented as follows:

[0007] In a first aspect, there is provided a design method of a ship wave crest plate floating breakwater, and the steps of the design method are as follows:

[0008] Step 1, collect the hydrological conditions and ship type characteristic data of the water area to be protected;

[0009] The hydrographic conditions of the intended protected sea area include: the designed navigable water level;

[0010] The ship type characteristics include: the wave height H, wavelength L, and wave direction θ of the ship-generated waves;

[0011] Step 2, determine the periodic unit structure and layout of the ship-generated wave cusp plate floating breakwater;

[0012] S21, construct a floating breakwater structure with a triple wave dissipation and energy dissipation module;

[0013] For the first structure, a cusp-shaped perforated plate is arranged on the outer side of the periodic unit structure. When the waves reach the cusp-shaped perforated plate, they interact with each other and break the waves;

[0014] The cusp-shaped vertex B of the cusp-shaped perforated plate and the bottom endpoint form a straight line AB or a straight line BC perpendicular to the wave direction θ of the ship-generated waves;

[0015] S22, for the second structure, using the wave modulation theory, connect multiple identical isosceles cusp-shaped perforated plates in sequence to form an overlapping wave ridge plate group, constituting a rhythmical structure;

[0016] The length r of the bottom side AC of the cusp-shaped perforated plate needs to satisfy the following formula with the wave direction θ and the main wavelength L of the ship-generated waves in the intended protected water area:

[0017]

[0018] Here, ε1 = 1, 2, 3... ε1 represents the diffraction secondary and takes positive numbers;

[0019] S23, for the third structure, construct a floating box inside the periodic unit structure. The floating box is a cuboid wave dissipation cavity composed of perforated plates, allowing the waves to move back and forth in it to further dissipate the energy of the waves; Step 3, determine the dimensional parameters of each periodic unit structure in the ship-generated wave cusp plate floating breakwater;

[0020] Step 4, connect multiple said periodic unit structures in sequence to form the ship-generated wave cusp plate floating breakwater.

[0021] Furthermore, the overlapping wave ridge plate group is three or four groups. The three groups are connected to the upper and lower surfaces and the front surface facing the waves of the floating box, and the four groups are connected to the upper and lower surfaces and the front and rear surfaces of the floating box; the length of the floating box is equal to the length of each overlapping wave ridge plate group, that is, the number N of the cusp-shaped perforated plate structures needs to satisfy the following formula:

[0022] Nr = a.

[0023] Furthermore, n perforated partitions facing the front of the box are equidistantly arranged inside the floating box, where n ≥ 1.

[0024] Furthermore, the bottom surface of the overlapping wave ridge plate group forms a straight line, and the distances from the pointed ridge-shaped vertex B to the endpoints of the bottom surface are equal for the straight lines AB and BC.

[0025] Furthermore, the overall height of each periodic unit structure of the ship wave pointed ridge plate floating breakwater is 2 to 4 times the height of the ship wave.

[0026] Furthermore, there are three groups of the overlapping wave ridge plate groups in total. The length and width of the overlapping wave ridge plate groups are the same as those of the floating box body. The overlapping wave ridge plate groups are connected to the upper and lower surfaces and the front and rear surfaces of the floating box body, and the edges fit with the floating box body. The wave directions of the overlapping wave ridge plate groups connected to the upper and lower and front and rear surfaces of the floating box body are arranged horizontally in the left-right direction.

[0027] Furthermore, there are four groups of the overlapping wave ridge plate groups in total. The length and width of the overlapping wave ridge plate groups are the same as those of the floating box body. The overlapping wave ridge plate groups are connected to the upper and lower surfaces and the front and rear surfaces of the floating box body, and the edges fit with the floating box body. The wave directions of the overlapping wave ridge plate groups connected to the upper and lower and front and rear surfaces of the floating box body are arranged horizontally in the left-right direction.

[0028] The second aspect of the present invention is a periodic unit of a ship wave pointed ridge plate floating breakwater. Based on the above-mentioned design method of the ship wave pointed ridge plate floating breakwater, it includes a floating box body and an overlapping wave ridge plate group. The floating box body is a rectangular box body composed of perforated plates. Inside the floating box body, n perforated partitions facing the front of the box body are arranged at equal distances, where n≥1, and the internal space of the box body is orderly divided into multiple equidistant intervals.

[0029] The left and right sides of the floating box body are squares; the overlapping wave ridge plate group is composed of multiple identical isosceles pointed ridge-shaped perforated plates connected in sequence, with the bottom surface on a horizontal line and an undulating wave-like surface formed above; the pointed ridge-shaped perforated plate is a pointed ridge-shaped plate composed of two identical rectangular perforated plates; the overlapping wave ridge plate group is at least three groups, the length and width of the overlapping wave ridge plate group are the same as those of the floating box body, the overlapping wave ridge plate group is connected to the upper and lower surfaces and the front surface of the floating box body, and the edges fit with the floating box body. The wave directions of the overlapping wave ridge plate groups connected to the upper and lower and front surfaces of the floating box body are arranged horizontally in the left-right direction.

[0030] The third aspect of the present invention is that the above structure is used for a ship wave pointed ridge plate floating breakwater device, which can protect rivers, lakes, and coasts.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention consists of a triple wave dissipation module. First, when the wave reaches the pointed-ridge perforated plate, the interaction between the two causes wave breaking and the first wave dissipation effect. Secondly, the present invention adopts the wave motion modulation theory, connects the pointed-ridge plates in sequence to form a rhythmic structure, and uses the wave interference effect to change the wave propagation path, realizing efficient wave reflection and reducing the wave transmission rate. Finally, through the cuboid wave dissipation cavity composed of rectangular perforated plates, the wave moves back and forth in it, generating energy dissipation. This technological innovation not only enhances the protection effect of river and coastal areas, but also provides a more scientific and efficient method for river and coastal protection.

[0033] 2. The modular design of the ship traveling wave pointed-ridge plate floating breakwater provides high flexibility, construction convenience and scalability, and can quickly adjust the structural 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 water area environments and requirements. In addition, the structural design takes into account both environmental protection and economic benefits, adapts to different water area environments through customized design, and reduces material use and cost at the same time.

[0034] The following further elaborates on the present invention in combination with the accompanying drawings and specific implementation manners. Description of the Drawings

[0035] Figure 1 It is a three-dimensional structure schematic diagram of the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater of the present invention;

[0036] Figure 2 It is the front view of the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater of the present invention;

[0037] Figure 3 It is the top view of the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater of the present invention;

[0038] Figure 4 It is the left view of the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater of the present invention;

[0039] Figure 5 It is the diagram of the positional relationship between the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater of the present invention and the direction of the ship traveling wave;

[0040] Figure 6 It is the wave dissipation effect diagram of the ship traveling wave pointed-ridge plate floating breakwater of the present invention;

[0041] Figure 7 It is the diagram of the positional relationship between the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater in Embodiment 2 of the present invention and the direction of the ship traveling wave;

[0042] Figure 8 It is the left view of the periodic unit structure of the ship traveling wave pointed-ridge plate floating breakwater in Embodiment 2 of the present invention.

[0043] In the figure: 10 is a floating box body, 20 is a group of stacked wave ridge plates, 1 is a pointed ridge-shaped perforated plate, and 2 is a perforated partition plate. Specific implementation mode

[0044] Embodiment 1:

[0045] This embodiment is a design method for a ship traveling wave pointed ridge plate floating breakwater. As Figures 1-8 shown, the steps of the design method are as follows:

[0046] Step 1, collect the hydrological conditions and ship type characteristic data of the water area to be protected:

[0047] S11. The hydrological conditions of the water area to be protected include: the designed navigable water level is 6.3 m;

[0048] S12. The ship type characteristics include: the wave height H, wavelength L, and wave direction θ of the ship traveling wave. In this embodiment, H = 0.353 m, L = 7.54 m, and θ = 35.14°.

[0049] Step 2, determine the layout of the periodic unit structure of the ship traveling wave pointed ridge plate floating breakwater:

[0050] The design idea is to construct a floating breakwater structure with a triple wave dissipation and energy dissipation module. This structure is composed of several periodic single-use structures, including: the first structure, multiple pointed ridge-shaped perforated plates are arranged on the outer side of the periodic unit structure, and the waves interact when they reach the pointed ridge-shaped perforated plates, breaking the waves; the second structure, using the wave motion modulation theory, the pointed ridge-shaped perforated plates are connected in sequence to form a rhythm structure, so that the waves have a phase difference during propagation, and the wave propagation path is changed by the wave interference effect; the third structure, a cuboid wave dissipation cavity composed of perforated plates is constructed inside the periodic unit structure, so that the waves move back and forth in it, further dissipating the energy of the waves.

[0051] S21. The periodic unit structure of the ship traveling wave pointed ridge plate floating breakwater is composed of a floating box body 10 and a group of stacked wave ridge plates 20. The floating box body 10 is a rectangular box body composed of 4 rectangular perforated plates and 2 square perforated plates. The group of stacked wave ridge plates 20 is composed of multiple identical isosceles pointed ridge-shaped perforated plates 1 connected in sequence; in this embodiment, the group of stacked wave ridge plates 20 is three groups, which are respectively connected to the upper and lower surfaces and the front surface facing the waves of the floating box body 10;

[0052] S22. There are n equally spaced rectangular perforated partitions inside the floating box body 10, where n ≥ 1. In this embodiment, n is 2;

[0053] S23. The bottom edges of the group of stacked wave ridge plates 20 are all on the same straight line;

[0054] S24. Since the energy of the ship traveling wave mainly concentrates on the water surface, the vertical height m of the periodic unit of the ship traveling wave ridge plate floating breakwater is 2 to 4 times the wave height of the ship traveling wave. In this embodiment, it is calculated as 4 times, m = 4H = 1.41 m;

[0055] S25. The vertex B of the ridge-shaped perforated plate 1 and the bottom end point form a straight line AB or a straight line BC perpendicular to the wave direction θ of the ship traveling wave;

[0056] S26. The length r of the bottom edge AC of the ridge-shaped perforated plate 1 and the main wavelength L of the wave direction θ of the ship traveling wave in the water area to be protected satisfy the following formula:

[0057]

[0058] S27. There are three groups of the overlapping wave ridge plate groups 20, and each group is composed of N ridge-shaped perforated plates 1 connected. In this embodiment, N = 4.

[0059] Step 3. Determine the dimensional parameters of each periodic unit structure in the ship traveling wave ridge plate floating breakwater:

[0060] The dimensions of the periodic unit structure include: the vertical height m of the unit structure, the length a of the floating box body 10, the height b of the floating box body 10, the width b of the floating box body 10, the height h of the ridge-shaped perforated plate 1, the width r of the ridge-shaped perforated plate 1, and the number N of the ridge-shaped perforated plates 1;

[0061] According to the hydrological conditions and ship type characteristic data of the water area to be protected and the layout of the periodic unit structure, the vertical height m of the periodic unit structure is 1.41 m, the number N of the ridge-shaped perforated plates 1 is 4, the ship traveling wave wavelength L is 7.54 m, and the ship traveling wave direction θ is 35.14°. For the convenience of calculation, 35° is taken here;

[0062] The length r of the bottom edge AC of the ridge-shaped perforated plate 1 and the main wavelength L of the wave direction θ of the ship traveling wave in the water area to be protected satisfy the formula in the above step S26.

[0063] The value of r will affect the height of the ridge-shaped perforated plate and the overall change of the structure. Since the navigable water level is relatively shallow in the embodiment, preferably, ε1 is taken as 10 in this embodiment, and it can be calculated that r is 0.46 m;

[0064] According to the design scheme, the ship traveling wave direction θ is perpendicular to AB or BC. It is calculated that ∠BAD = 180 - 90 - 35 = 55°. According to the trigonometric function tanθ = BD / AD = h / 0.5r, it can be calculated that the height h of the ridge-shaped perforated plate 1 is 0.33 m.

[0065] Therefore, the height b of the floating box body 10 is obtained as b = m - 2h = 0.75 m.

[0066] The length a of the floating box body 10 is a = Nr = 1.84 m, that is, the length of each periodic unit structure is 1.84 m (the above calculation is rounded to two decimal places, and the length of the periodic unit structure can be adjusted according to actual needs, and the adjustment method is usually to change the value of N).

[0067] The comprehensive data of this embodiment are as follows: the vertical height m of the periodic unit structure is 1.41 m, the number of three groups of pointed ridge-shaped perforated plates 1 is 3N = 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 floating box body 10 is 1.84 m, the height b of the floating box body 10 is 0.75 m, the height h of the pointed ridge-shaped perforated plate 1 is 0.33 m, and the width r of the pointed ridge-shaped perforated plate 1 is 0.46 m.

[0068] Step 4: Connect a plurality of the periodic unit structures in sequence to form the ship traveling wave pointed ridge plate floating breakwater.

[0069] Embodiment 2:

[0070] A ship traveling wave pointed ridge plate floating breakwater in this embodiment is composed of a plurality of ship traveling wave pointed ridge plate floating breakwater periodic units connected together, as shown in Figure 1 and Figures 7-8 As shown, the periodic unit includes a floating box body 10 and a stacked wave ridge plate group 20. The floating box body 10 is a rectangular box body composed of perforated plates. Two perforated partition plates 2 facing the front of the box body are equidistantly arranged inside the floating box body 10, and the internal space of the box body is orderly divided into three equidistant intervals. The left and right sides of the floating box body 10 are square;

[0071] The stacked wave ridge plate group 20 is composed of a plurality of identical isosceles pointed ridge-shaped perforated plates 1 connected in sequence, with the bottom surface on a horizontal line and an orderly undulating wavy surface formed above;

[0072] The pointed ridge-shaped perforated plate 1 is a pointed ridge-shaped plate composed of two identical rectangular perforated plates;

[0073] There are four groups of the stacked wave ridge plate group 20 in total, as shown in Figure 1 and Figures 7-8 As shown, the length and width of the stacked wave ridge plate group 20 are the same as those of the floating box body 10. The stacked wave ridge plate group 20 is connected to the upper and lower surfaces and the front and rear surfaces of the floating box body 10, and the edges fit with the floating box body 10. The wave direction of the stacked wave ridge plate group 20 connected to the upper and lower and front and rear surfaces of the floating box body 10 is arranged horizontally in the left-right direction.

[0074] The perforated plate is made of PVC material.

[0075] A ship traveling wave pointed ridge plate floating breakwater of the present invention, as shown in Figure 1As shown in the figure, it consists of a triple wave dissipation module. First, the wave travels to the pointed-ridge perforated plate 1, and the interaction between the two causes wave breaking and the first wave dissipation effect. Secondly, the present invention adopts the wave motion modulation theory, connects the pointed-ridge perforated plates 1 in sequence to form a rhythmical structure, and uses the wave interference effect to change the wave propagation path, realizing the efficient reflection of waves and reducing the wave transmittance. Finally, a cuboid wave dissipation cavity composed of rectangular perforated plates is set, and the wave moves back and forth in it, generating energy dissipation. Figure 6 It is the wave dissipation effect diagram of the ship traveling wave pointed-ridge plate floating breakwater obtained by the design method of the present invention. In the figure, the black part represents the structure of the pointed-ridge plate floating breakwater of the present invention. The linear shape in front of it (left side) is the change of the ship traveling wave height state, and the linear state behind it (right side) represents the ship traveling wave state after passing through the pointed-ridge plate floating breakwater 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 (right side) the pointed-ridge plate floating breakwater structure 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.

[0076] In this embodiment, according to the experimental equipment and prototype size, a 1:10 length scale is adopted to conduct the energy dissipation experiment of this embodiment. The ship model used is scaled according to the 1:10 scale of a 5000 DWT bulk carrier, and the ship model size is 7m * 1.5m. The experimental ship speed is set at 1.35m / s. Experiments are carried out respectively under three water depth conditions of 1.05m, 1.09m, and 1.13m to study the characteristics of the floating breakwater. Through pre-experiments, the effective energy dissipation rate of the floating breakwater is about 60% - 75%.

[0077] Finally, it should be noted that the above is only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred arrangement, those of ordinary skill in the art should understand that the technical solution of the present invention (such as the application of various formulas, the sequence of steps, etc.) can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for designing a ship-borne wave crest ridge floating breakwater, characterized in that: The design method steps are as follows: Step 1: Collect the hydrological conditions and ship type characteristic data of the waters to be protected; The hydrological conditions of the sea area to be protected include: the designed navigation water level; Ship characteristics include: ship wave height H, wave length L, ship wave direction θ; Step 2, determining the periodic unit structure and layout of the ship wave tip ridge plate floating breakwater; S21, construct a floating breakwater structure with triple wave-absorbing and energy-dissipating modules; In the first structure, a sharp ridge-shaped perforated plate (1) is arranged outside the periodic unit structure, and waves interact with the sharp ridge-shaped perforated plate (1) when traveling to the sharp ridge-shaped perforated plate (1), thereby breaking the waves; The apex B of the pointed ridge opening plate (1) and the end point of the bottom surface form a straight line AB or a straight line BC which is perpendicular to the wave direction θ of the ship wave; S22, the second structure, adopting the wave modulation theory, connects a plurality of the same isosceles pointed ridge opening plates (1) in sequence to form a stacked wave ridge plate group (20), forming a rhythmic structure; The length r of the bottom side AC of the pointed ridge perforated plate (1) and the wave direction θ and the main wavelength L of the ship wave in the water area to be protected need to satisfy the following formula: Here ε1 = 1, 2, 3…ε1 represents the diffraction order and takes a positive number; S23, a third structure, a floating box (10) is constructed inside the periodic unit structure, the floating box (10) is a rectangular parallelepiped wave-absorbing cavity composed of perforated plates, allowing waves to move back and forth therein, further dissipating the energy of the waves; Step 3, determining the size parameters of each periodic unit structure in the ship wave tip ridge plate floating breakwater; Step 4, a plurality of the periodic unit structures are sequentially connected to form the ship-borne wave crest ridge floating breakwater.

2. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 1, characterized in that: The wave-stacked ridge plate groups (20) are three or four groups, three groups are connected to the upper and lower surfaces and the front surface facing the waves of the floating box (10), and four groups are connected to the upper and lower surfaces and the front and rear surfaces of the floating box (10); the length of the floating box (10) is equal to the length of each group of the wave-stacked ridge plate groups (20), that is, the number N of the pointed ridge perforated plate (1) structures needs to satisfy the following formula: Nr=a.

3. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 1, characterized in that: N perforated partitions (2) facing the front of the floating box (10) are arranged at equal distances in the floating box (10), wherein n≥1.

4. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 1, characterized in that: The bottom surface of the stacked corrugated ridge plate group (20) forms a straight line, and the distances between the apex B of the pointed ridge and the end point of the bottom surface to form a straight line AB and a straight line BC are equal.

5. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 1, characterized in that: The overall height of each periodic unit structure in the ship wave peak ridge plate floating breakwater is 2 to 4 times the height of the ship wave.

6. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 2, characterized in that: There are three groups of the stacked wave ridge plate groups (20), the length and width of the stacked wave ridge plate groups (20) are equal to the floating box (10), the stacked wave ridge plate groups (20) are connected to the upper and lower surfaces and the front surface of the floating box (10), the edges are matched with the floating box (10), and the wave direction of the stacked wave ridge plate groups (20) connected to the upper and lower surfaces and the front and rear surfaces of the floating box (10) is arranged horizontally in the left and right direction.

7. The method for designing a ship-borne wave crest ridge floating breakwater according to claim 2, characterized in that: There are four groups of the stacked wave ridge plate groups (20), the length and width of the stacked wave ridge plate groups (20) are equal to the floating box (10), the stacked wave ridge plate groups (20) are connected to the upper and lower surfaces and the front and rear surfaces of the floating box (10), the edges are matched with the floating box (10), and the wave direction of the stacked wave ridge plate groups (20) connected to the upper and lower surfaces and the front and rear surfaces of the floating box (10) is arranged horizontally in the left and right direction.

8. A periodic unit structure of a ship-borne wave tip ridge plate floating breakwater, based on the ship-borne wave tip ridge plate floating breakwater design method according to any one of claims 1 to 7, characterized in that: The invention comprises a floating box (10) and a stacked corrugated ridge plate group (20), wherein the floating box (10) is a rectangular box composed of perforated plates, and n perforated partition plates (2) facing the front of the box are arranged at equal distances in the floating box (10), wherein n≥1, so that the internal space of the box is orderly divided into a plurality of equidistant intervals; The left and right sides of the floating box (10) are square; the stacked wave ridge plate group (20) is composed of a plurality of identical isosceles pointed ridge perforated plates (1) connected in sequence, the bottom surface is on a horizontal line, and an undulating and orderly wavy surface is formed on the top; the pointed ridge perforated plates (1) are pointed ridge plates composed of two identical rectangular perforated plates; the stacked wave ridge plate group (20) is at least three groups, the length and width of the stacked wave ridge plate group (20) are equal to the floating box (10), the stacked wave ridge plate group (20) is connected to the upper and lower surfaces and the front surface of the floating box (10), the edge is matched with the floating box (10), and the wave direction of the stacked wave ridge plate group (20) connected to the upper and lower surfaces and the front surface of the floating box (10) is arranged horizontally in the left and right direction.

9. A ship-type wave tip ridge plate floating breakwater periodic unit structure based on claim 8 is used for a ship-type wave tip ridge plate floating breakwater device, which can protect rivers, lakes and coasts.

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