A long-period wave-reducing breakwater based on the principle of water wave resonance

Abstract

The invention relates to the technical field of coastal engineering, and discloses a long-period wave-reducing breakwater based on the water wave resonance principle. The breakwater comprises a C-shaped resonator and a plurality of pile legs, wherein a base is commonly connected between the C-shaped resonator and the plurality of pile legs, the C-shaped resonator is detachably connected to the upper end of the base through bolts, and the plurality of pile legs are circumferentially distributed at the lower end of the base, and the base, the C-shaped resonator and the plurality of pile legs jointly form a wave-reducing unit, which is arranged in a rectangular array to form a breakwater, and the outer diameter, the inner diameter and the opening size of two adjacent C-shaped resonators in the array are gradually changed according to a certain rule, and the C-shaped resonator utilizes a large cavity and a small opening structure to induce resonance to reduce long waves several times the wavelength of a characteristic size of a cylinder, so that waves of different frequencies undergo local resonance and wave-reduction at different spatial positions of the array-type breakwater, and long-period waves within a wide frequency domain are effectively reduced, and a sheltered water area with stable mooring is formed behind the breakwater.

Description

Technical Field

[0001] The invention relates to the technical field of coastal engineering, in particular to a long-period wave reduction breakwater based on the water wave resonance principle. Background Art

[0002] As a coastal engineering structure to resist the action of waves, breakwaters provide sufficient water depth and stable water surface for ships to berth, operate and enter and leave in the sheltered waters behind the breakwaters. At the same time, they can also prevent the erosion of the shoreline behind the breakwaters, thereby playing a role in protecting the marine ecological environment. With the increase in export trade, overseas port engineering projects have increased year by year, and most of them are located in sea areas dominated by long-period swells. Traditional breakwaters mainly act on short waves and have limited effect on reducing long waves. When a traveling wave encounters an offshore structure, part of the wave energy will be reflected by the structure (reflected wave), and the other part of the energy will bypass the structure and continue to propagate forward (diffraction / transmission wave). There will be complex interactions between the incident wave and the reflected wave and the diffracted wave, which may induce wave resonance phenomena, such as local resonance induced by sub-wavelength resonant cavity structure, Bragg resonance induced by uniformly arranged array structure, and "rainbow trap wave" induced by gradient array. When resonance occurs, a large part of the wave energy is reflected back to the open sea or dissipated, thereby greatly reducing the wave energy after entering the structure and forming a sheltered water area with good operation / mooring conditions.

[0003] Since traditional breakwaters mainly act on short waves and have limited effect on reducing long waves, it is necessary to build breakwaters of larger size and volume to eliminate waves with longer periods, which also increases construction costs and requirements for seabed foundations.

[0004] Currently, existing breakwaters are unable to attenuate longer period waves with smaller structural feature dimensions and are unable to induce polymorphic wave resonance. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the present invention provides a breakwater for reducing long-period waves based on the principle of water wave resonance, which solves the problem that the existing breakwaters cannot reduce long-period waves with smaller structural characteristic dimensions.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a long-period wave reduction breakwater based on the principle of water wave resonance, comprising a C-shaped resonator and a plurality of pile legs, wherein a base is commonly connected between the C-shaped resonator and the plurality of pile legs, wherein the upper end of the C-shaped resonator is detachably connected to the upper end of the base by bolts, and the C-shaped resonator is connected to the upper end of the base to form a pressure relief channel for mitigating water flow impact;

[0009] The plurality of pile legs are circumferentially distributed at the lower end of the base, the upper ends of the pile legs are detachably connected to the lower end of the base, the base, the C-shaped resonator and the plurality of pile legs together form an independent wave-breaking unit, the C-shaped resonator is made by opening a water inlet on the side wall of the pipe, the plurality of independent wave-breaking units are inserted into the seabed foundation and arranged in a rectangular array to form a breakwater, and the outer diameter, inner diameter and opening size of two adjacent C-shaped resonators in the array are gradually changed according to a certain rule;

[0010] The C-shaped resonator utilizes a large cavity with a small opening to induce resonance and attenuate long waves that are several times longer than the characteristic wavelength of the cylinder.

[0011] The pile leg is a tubular structure and a flow guide assembly is movably connected therein, and the lower end of the pile leg is a conical structure;

[0012] The base is a box-shaped structure and an end cover is fixedly connected to its upper opening. A flow guide structure is arranged inside the base. Two inlets respectively connected to the flow guide structure are provided on one side of the base, and two outlets respectively connected to the flow guide structure are provided on the other side of the base.

[0013] Preferably, the guide assembly comprises a guide plate with a special-shaped structure, a first strip opening is provided on one side of the pile leg, a second strip opening is provided on the other side of the pile leg, a plurality of rectangular through-holes are provided on the side wall of the pile leg, screws are provided in the plurality of rectangular through-holes, and a gasket is sleeved on the side wall of the screw, protrusions contacting the inner wall of the pile leg are provided at both upper and lower ends of the guide plate, the screws are threadedly connected to the protrusions at the lower end of the guide plate, a plurality of pressure relief holes are provided on the side wall of the pile leg, and the plurality of pressure relief holes are symmetrically distributed on both sides of the second strip opening;

[0014] The edge of the guide plate forms a flow-through portion between the protrusion and the inner wall of the pile leg.

[0015] Preferably, the side wall of the guide plate is fixedly connected with a plurality of evenly distributed circular plates, and the circular plates are located between two adjacent pressure relief holes. The guide plate is provided with a diverter portion and two guide portions, and the cross-section is a Y-shaped structure. The edge of the diverter portion faces the first strip opening, and the two guide portions respectively face the plurality of symmetrically distributed pressure relief holes, and the second strip opening is located between the two guide portions.

[0016] Preferably, the upper end of the pile leg is fixedly connected with a connecting plate, the connecting plate is symmetrically provided with bending portions at both ends, and the bending portions are provided with right-angle clamps, the right-angle clamps are fixed to the lower end of the base, one side of the right-angle clamp is threadedly connected with a fixing bolt through a threaded hole, the other two sides of the connecting plate are provided with connecting portions, the connecting portions are sleeved with screws, and the lower end of the base is connected to the screws through the threaded holes.

[0017] Preferably, a first arc groove is provided on one side of the right-angle clamping block, the first arc groove is connected to the threaded hole on one side of the right-angle clamping block, the bending portion is provided with a second arc groove, a positioning groove is provided at the bending part of the bending portion, the second arc groove is connected to the positioning groove, one end of the fixing bolt is fixedly connected with a positioning pin, the positioning pin passes through the first arc groove and the second arc groove and extends into the positioning groove.

[0018] Preferably, the upper end of the bending portion is fixedly connected with two positioning blocks, and the lower end of the base is provided with two blind holes matched with the positioning blocks, and the positioning blocks are located in the blind holes.

[0019] Preferably, a circular ring is sleeved at the opening of the lower end of the C-shaped resonator, a cutout corresponding to the position of the water inlet is opened on the side wall of the circular ring, a plurality of arc blocks are fixedly connected to the inner wall of the C-shaped resonator, a plurality of third strip openings are opened on the side wall of the circular ring, connecting bolts are sleeved in the plurality of third strip openings, the arc blocks are threadedly connected to the connecting bolts through threaded holes, a plurality of the arc blocks form a pressure relief channel between the C-shaped resonator and the circular ring, and the circular ring is coaxially fixed to the upper end of the end cover.

[0020] Preferably, the guide structure includes two first partitions and two second partitions, and the first partitions and the second partitions are symmetrically distributed and divide the base into a first channel and a second channel, and the first partition and the second partition are both provided with two folded edges, and the two folded edges of the first partition are not in contact with the inner wall of the base, and the two folded edges of the second partition are in contact with the inner wall of the base.

[0021] Preferably, a pressure relief port is provided on the side wall of the end cover, and the pressure relief port is connected to the inside of the base. A drain port is provided on one side of the base, and the drain port is located between two outlets. A baffle is provided in the base, and the baffle is located on one side of the drain port.

[0022] Preferably, the breakwater takes a central area consisting of 4×4 C-shaped resonators as a basic area, in which the spacing between two adjacent C-shaped resonators in the x direction is a1, and the spacing in the y direction is a2, along the x direction, the spacing a1, the outer diameter, the inner diameter and the opening size of two adjacent C-shaped resonators are gradually changed according to a certain rule, and the specific values ​​and the gradual change rules of the gradual change parameters are determined according to the sea conditions of the target sea area combined with the Bloch band theory analysis, in the y direction, the size parameters and spacing of two adjacent C-shaped resonators are the same, and the number N and M of the C-shaped resonator array is determined according to the main frequency range of waves in the target sea area and the size of the required sheltered waters, wherein the larger the N, the wider the frequency domain range of wave elimination, and the larger the M, the larger the sheltered waters area.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a long-period wave reduction breakwater based on the water wave resonance principle, which has the following beneficial effects:

[0025] 1. By inducing local resonance using the unique "C"-shaped structural design, the limitation of traditional breakwater structures that cannot effectively reduce and resist long-period waves can be broken through. At the same time, the unique "C"-shaped structural gradient array arrangement can be used to induce multi-type wave resonance, effectively reducing long-period waves in the wide frequency domain of the target sea area, so that waves of different frequencies can undergo local resonance and wave elimination at different spatial positions of the C-shaped cylindrical array. Long-period waves in the wide frequency domain are effectively reduced, forming a sheltered water area with good operating conditions behind the breakwater.

[0026] 2. The characteristic parameters of the C-shaped resonator include draft d, outer diameter R1, inner diameter R2 and water inlet size ln. These parameters can be determined according to the wave conditions in the target sea area and combined with the Bloch band theory and the linear potential flow hydrodynamic calculation model analysis. The C-shaped cylinder is fixed to the seabed by a guide pile. At this time, each C-shaped resonator is installed with four or more pile legs. When fixing, the pile legs need to be driven into the seabed. When installing, take a central area composed of 4×4 C-shaped resonators as an example. In this area, the spacing between adjacent C-shaped resonators in the x direction is a1, and in the y direction is a2. The upward spacing is a2. Along the x direction, the spacing a1, the outer diameter, inner diameter and opening size of the two adjacent C-shaped resonators gradually change according to a certain rule. The specific values ​​and gradual change rules of these parameters need to be determined according to the sea conditions of the target sea area combined with the Bloch band theory analysis. In the y direction, the size parameters and spacing of the two adjacent C-shaped resonators are the same. In practical applications, the number N and M of the C-shaped resonator array are determined according to the main frequency range of waves in the target sea area and the size of the required sheltered waters. The larger N is, the wider the frequency domain range of wave elimination is, and the larger M is, the larger the sheltered water area is.

[0027] 3. The leg parts are inserted into the seabed foundation to arrange multiple wave-breaking units in a rectangular array to form a breakwater. The C-shaped resonator at the top is formed into a "C"-shaped structure through the water inlet. The structure has a cylindrical chamber that allows water to move up and down. When waves of a specific frequency propagate and enter the cavity through the opening, they will continue to oscillate up and down inside and radiate waves with the same frequency / wave number as the incident wave outward. When the radiated waves constructively interfere with the incident waves, local resonance is induced. At this time, most of the wave energy is reflected back upstream or dissipated at the opening of the C-shaped structure, thereby reducing long-period waves of a specific frequency. According to the sea conditions of the target sea area, combined with the Bloch band theory and the linear potential flow hydrodynamic calculation and analysis model, the outer diameter, inner diameter, draft, opening size and direction of the C-shaped resonator structure are reasonably designed / selected to achieve the purpose of reducing the target long-period waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a wave-breaking unit in a breakwater for reducing long-period waves based on the principle of water wave resonance proposed by the present invention;

[0029] Figure 2 A schematic diagram of the structure of the pile legs in a long-period wave breakwater based on the water wave resonance principle proposed by the present invention Figure 1 ;

[0030] Figure 3 The structural diagram of the bed legs of a long-period wave breakwater based on the water wave resonance principle proposed by the present invention Figure 2 ;

[0031] Figure 4 This is a schematic diagram of the structure of a flow guide component in a breakwater for reducing long-period waves based on the principle of water wave resonance proposed by the present invention;

[0032] Figure 5 The invention proposes a long-period wave breakwater based on the principle of water wave resonance. Figure 2 A cross-sectional view of

[0033] Figure 6 A schematic diagram of the bottom structure of a base in a breakwater for reducing long-period waves based on the water wave resonance principle proposed by the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of pile legs, connecting plates, right-angle blocks, fixing bolts and positioning pins in a long-period wave reduction breakwater based on the water wave resonance principle proposed by the present invention;

[0035] Figure 8 A schematic diagram of the bottom structure of pile legs and connecting plates in a long-period wave reduction breakwater based on the water wave resonance principle proposed by the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of a C-shaped resonator and an arc-shaped block in a breakwater for reducing long-period waves based on the principle of water wave resonance proposed by the present invention;

[0037] Fig.10 Schematic diagram of the structure of the end cover and the ring in the long-period wave breakwater based on the water wave resonance principle proposed by the present invention Figure 1 ;

[0038] Fig.11 Schematic diagram of the structure of the end cover and the ring in the long-period wave breakwater based on the water wave resonance principle proposed by the present invention Figure 2 ;

[0039] Fig.12This is a schematic structural diagram of a base, a first baffle and a second baffle in a long-period wave reduction breakwater based on the water wave resonance principle proposed by the present invention;

[0040] Fig.13 This is a diagram showing the array distribution effect of the wave-breaking units in a breakwater for reducing long-period waves based on the water wave resonance principle proposed by the present invention;

[0041] Fig.14 This is a top view of a C-shaped resonator in a breakwater for reducing long-period waves based on the principle of water wave resonance proposed by the present invention.

[0042] In the figure: 1, pile leg; 2, base; 3, end cover; 4, C-shaped resonator; 5, water inlet; 6, entrance; 7, bending part; 8, positioning block; 9, connecting plate; 10, first strip opening; 11, guide plate; 12, circular plate; 13, gasket; 14, pressure relief hole; 15, rectangular perforation; 16, second strip opening; 17, right-angle block; 18, fixing bolt; 19, blind hole; 20, positioning pin; 21, positioning groove; 22, incision; 23, first channel; 24, arc block; 25, pressure relief channel; 26, circular ring; 27, third strip opening; 28, connecting bolt; 29, pressure relief port; 30, drain outlet; 31, second channel; 32, baffle; 33, first partition; 34, second partition; 35, outlet. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1: Refer to the attached Figure 1-14 A long-period wave breakwater based on the principle of water wave resonance comprises a C-shaped resonator 4 and a plurality of pile legs 1, characterized in that: a base 2 is commonly connected between the C-shaped resonator 4 and the plurality of pile legs 1, the lower end of the C-shaped resonator 4 is detachably connected to the upper end of the base 2, and a pressure relief channel 25 for mitigating water flow impact is formed after the C-shaped resonator 4 is connected to the upper end of the base 2, the C-shaped resonator 4 is made by opening a water inlet 5 on the side wall of a pipe, and a plurality of independent wave-breaking units are inserted into a seabed foundation and arranged in a rectangular array to form a breakwater; and the outer diameter, inner diameter and opening size of two adjacent C-shaped resonators 4 in the array are gradually changed according to a certain rule, and the structure of a large cavity and a small opening is utilized to achieve induced resonance to reduce long waves several times the wavelength of the characteristic size of a cylinder;

[0045] A circular ring 26 is sleeved at the lower opening of the C-shaped resonator 4, and a cutout 22 corresponding to the position of the water inlet 5 is opened on the side wall of the circular ring 26. A plurality of arc blocks 24 are fixedly connected to the inner wall of the C-shaped resonator 4, and a plurality of third strip openings 27 are opened on the side wall of the circular ring 26. Connecting bolts 28 are sleeved in the plurality of third strip openings 27. The arc blocks 24 are threadedly connected to the connecting bolts 28 through threaded holes. The plurality of arc blocks 24 form a pressure relief channel 25 between the C-shaped resonator 4 and the circular ring 26. The circular ring 26 is coaxially fixed to the upper end of the end cover 3;

[0046] A plurality of pile legs 1 are circumferentially distributed at the lower end of the base 2, the upper end of the pile leg 1 is detachably connected to the lower end of the base 2, the base 2, the C-shaped resonator 4 and the plurality of pile legs 1 together form a wave-absorbing unit, the pile leg 1 is a tubular structure and a flow guide component is movably connected therein, and the lower end of the pile leg 1 is a conical structure;

[0047] The base 2 is a box-shaped structure and is fixedly connected to an end cover 3 at its upper opening. A flow guide structure is arranged in the base 2, and the flow guide structure includes two first partitions 33 and two second partitions 34, and the first partitions 33 and the second partitions 34 are symmetrically distributed and divide the base 2 into a first channel 23 and a second channel 31. The first partition 33 and the second partition 34 are both provided with two folded edges, and the two folded edges of the first partition 33 do not contact the inner wall of the base 2, and the two folded edges of the second partition 34 are both in contact with the inner wall of the base 2. One side of the base 2 is provided with two inlets 6 respectively connected to the flow guide structure, and the other side of the base 2 is provided with two outlets 35 respectively connected to the flow guide structure. A pressure relief port 29 is provided on the side wall of the end cover 3, and the pressure relief port 29 is connected to the inside of the base 2. A drain port 30 is provided on one side of the base 2, and the drain port 30 is located between the two outlets 35. A baffle 32 is arranged in the base 2, and the baffle 32 is located on one side of the drain port 30.

[0048] like Fig.14 As shown, a C-shaped cylindrical structure is formed after a water inlet 5 is opened on the side wall of the C-shaped resonator 4. Its characteristic parameters include draft d, outer diameter R1, inner diameter R2 and size of the water inlet 5 ln. These parameters can be determined according to the wave conditions of the target sea area in combination with Bloch band theory and linear potential flow hydrodynamic calculation model analysis. The C-shaped cylinder is fixed to the seabed by a guide pile. At this time, each C-shaped resonator 4 is installed with four or more pile legs 1. When fixing, the pile legs 1 need to be driven into the seabed.

[0049] Fig.13An N×M C-shaped resonator 4 array area is shown, and a central area composed of 4×4 C-shaped resonators 4 is taken as an example for explanation. In this area, the spacing between adjacent C-shaped resonators 4 in the x direction is a1, and the spacing in the y direction is a2. Along the x direction, the spacing a1, the outer diameter, inner diameter and opening size of two adjacent C-shaped resonators 4 gradually change according to a certain rule. The specific values ​​and gradual change rules of these parameters need to be determined according to the sea conditions of the target sea area combined with the Bloch band theory analysis. In the y direction, the size parameters and spacing of two adjacent C-shaped resonators 4 are the same. In practical applications, the number N and M of the C-shaped resonator 4 array is determined according to the main frequency range of waves in the target sea area and the size of the required sheltered waters. The larger N is, the wider the frequency domain range of wave elimination is, and the larger M is, the larger the sheltered water area is.

[0050] Through the design of the above structure, the pile leg 1 is partially inserted into the seabed foundation to arrange multiple wave-breaking units in a rectangular array to form a breakwater, wherein the C-shaped resonator 4 at the top is formed into a "C"-shaped structure through the opened water inlet 5. The structure has a cylindrical chamber that allows water to move up and down. When waves of a specific frequency propagate and enter the cavity through the opening, they will continue to oscillate up and down therein and radiate waves with the same frequency / wave number as the incident wave outward. When the radiated waves constructively interfere with the incident waves, local resonance is induced. At this time, most of the wave energy is reflected back upstream or dissipated at the opening of the C-shaped structure, thereby reducing long-period waves of a specific frequency. According to the sea conditions of the target sea area, and in combination with the Bloch band theory and the linear potential flow hydrodynamic calculation and analysis model, the outer diameter, inner diameter, draft, opening size, and direction of the C-shaped resonator 4 structure are reasonably designed / selected to achieve the purpose of reducing the target long-period waves.

[0051] C-type cylindrical array breakwater:

[0052] A single C-cylindrical structure can only absorb long-period waves with a single frequency or a very narrow frequency range, while real sea waves are composed of a series of regular waves with different frequencies superimposed on each other. To resolve this contradiction, C-cylindrical structures can be arranged in an array, and the characteristic parameters of the C-cylindrical structures, including their inner diameter, outer diameter and opening size, can be gradually processed along the wave propagation direction according to a certain rule, so that waves of different frequencies can undergo local resonance at different spatial positions of the C-cylindrical array, forming a "rainbow trap" type wave resonance wave absorption technology. At this time, long-period waves within a wide frequency domain are effectively absorbed, forming a sheltered water area with good operating / mooring conditions behind the breakwater.

[0053] The structure provided in the present technical solution is divided into three parts, namely, upper, middle and lower parts, and the middle base 2 is used as the connection foundation, and the upper end thereof is connected by a connecting bolt 28, and the width of the third strip-shaped opening 27 can be conveniently adjusted in the direction of the water inlet 5 according to actual needs, and then locked by the connecting bolt 28 after adjustment. In addition, when water flows into the C-shaped resonator 4 through the water inlet, the increased water body can be discharged through the pressure relief channel 25 between the C-shaped resonator 4 and the circular ring 26, and the arc block 24 can slow down the water flow speed during discharge, thereby slowing down the waves and the impact of the waves on the breakwater.

[0054] In addition, a guide structure is also provided in the middle base 2. Firstly, water flows through the inlet 6 into the first channel 23 and the second channel 31 in the base 2, and is finally discharged from the outlet 35. When the water flows back, the water can enter and discharge in the reverse direction, so that the effect of secondary wave elimination can be achieved. Secondly, the pressure relief port 29 on the end cover connects the C-shaped resonator 4 and the base 2. When the water body in the base 2 increases, the water body passes through the pressure relief port 29 into the channel between the two second partitions 34, and is discharged from the drain port 30. Similarly, when the water flows back, the water can enter and discharge in the reverse direction.

[0055] Finally, a flow guide component is provided inside the pile leg 1. The flow guide component and a plurality of pile legs 1 can be used to achieve wave elimination for deep wave currents.

[0056] Embodiment 2: Based on embodiment 1, the difference is that;

[0057] See attached Figure 2-5 The guide assembly includes a guide plate 11 with a special-shaped structure, a first strip opening 10 is opened on one side of the pile leg 1, a second strip opening 16 is opened on the other side of the pile leg 1, a plurality of rectangular through holes 15 are opened on the side wall of the pile leg 1, screws are arranged in the plurality of rectangular through holes 15, and a gasket 13 is sleeved on the side wall of the screw, protrusions contacting the inner wall of the pile leg 1 are arranged at the upper and lower ends of the guide plate 11, and the screws are threadedly connected to the protrusions at the lower end of the guide plate 11, and a plurality of pressure relief holes 14 are opened on the side wall of the pile leg 1, and the plurality of pressure relief holes 14 are symmetrically distributed on both sides of the second strip opening 16;

[0058] The edge of the guide plate 11 forms a flow-through portion between the protrusion and the inner wall of the pile leg 1. The side wall of the guide plate 11 is fixedly connected with a plurality of evenly distributed circular plates 12, and the circular plates 12 are located between two adjacent pressure relief holes 14. The guide plate 11 is provided with a diverter portion and two guide portions, and the cross section is a Y-shaped structure. The edge of the diverter portion faces the first strip opening 10, and the two guide portions respectively face the symmetrically distributed multiple pressure relief holes 14, and the second strip opening 16 is located between the two guide portions.

[0059] When the deep water enters the pile leg 1 from the first strip-shaped opening 10, the diversion part divides the water flow into two flows, and during the flow process, the water is respectively diverted to the pressure relief hole 14 by the two guide parts and partially discharged. The water that is not discharged passes through the flow-through part and is concentrated and discharged from the second strip-shaped opening 16, so that the deep water flow can be blocked. The multiple pile legs 1 are all cylindrical structures, and the direction of the wave water flow can be changed when encountering waves, so that the wave-breaking effect can be achieved. The multiple circular plates 12 fixed on the guide plate 11 can divide the pile leg 1 into multiple flow chambers, and the gasket 13 can slide on the surface of the pile leg 1 when the screws are tightened, so that the guide plate 11 can slide up and down a certain distance when the water flows, so that the pile leg 1 can support the C-shaped resonator 4 to form a breakwater, and can also use its own circular structure and its internal structure to play a wave-breaking role.

[0060] Embodiment 3: Based on embodiment 1, the difference is that;

[0061] See attached Figure 6-8 The upper end of the pile leg 1 is fixedly connected with a connecting plate 9, and the two symmetrical ends of the connecting plate 9 are provided with bending parts 7, and the bending parts 7 are provided with right-angle clamping blocks 17, and the right-angle clamping blocks 17 are fixed to the lower end of the base 2, and one side of the right-angle clamping block 17 is threadedly connected with a fixing bolt 18 through a threaded hole, and the other two sides of the connecting plate 9 are provided with connecting parts, and the connecting parts are sleeved with screws. The lower end of the base 2 is connected with the screws through the threaded holes, and one side of the right-angle clamping block 17 is provided with a first arc groove, and the first arc groove and the right-angle clamping block The threaded hole on one side of 17 is connected, the bending portion 7 is provided with a second arc groove, a positioning groove 21 is opened at the bending portion 7, the second arc groove is connected to the positioning groove 21, one end of the fixing bolt 18 is fixedly connected with a positioning pin 20, the positioning pin 20 passes through the first arc groove and the second arc groove and extends into the positioning groove 21, the upper end of the bending portion 7 is fixedly connected with two positioning blocks 8, and the lower end of the base 2 is provided with two blind holes 19 matched with the positioning blocks 8, and the positioning blocks 8 are located in the blind holes 19.

[0062] Designing the pile leg 1 and the base 2 as an assembled structure can save transportation space (such as installing the pile leg 1 in a C-shaped resonator), and can also replace a damaged component separately when the breakwater is subsequently maintained, and the connection method is simple and reliable. For example, when the fixing bolt 18 installed on the side is inserted into the threaded hole, the positioning pin 20 first penetrates the first arc groove and the second arc groove. At this time, the positioning block 8 on the bent portion 7 inserted into the right-angle block 17 is inserted into the blind hole 19. At this time, the upper end of the bent portion 17 contacts the lower end of the base 2. Continue to screw the fixing bolt 18 into the screw hole until one end of the positioning pin 20 is inserted into the positioning groove 21, so that the pile leg 1 can be assembled.

[0063] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-period wave reduction breakwater based on the water wave resonance principle, comprising a C-shaped resonator (4) and a plurality of pile legs (1), characterized in that: A base (2) is commonly connected between the C-shaped resonator (4) and the plurality of pile legs (1); the lower end of the C-shaped resonator (4) is detachably connected to the upper end of the base (2) via bolts; and after the C-shaped resonator (4) is connected to the upper end of the base (2), a pressure relief channel (25) is formed to mitigate water flow impact; The plurality of pile legs (1) are circumferentially distributed at the lower end of the base (2); the upper end of the pile leg (1) is detachably connected to the lower end of the base (2); the base (2), the C-shaped resonator (4) and the plurality of pile legs (1) together form an independent wave-breaking unit; the C-shaped resonator (4) is obtained by opening a water inlet (5) on the side wall of a pipe; the plurality of independent wave-breaking units are inserted into a seabed foundation and arranged in a rectangular array to form a breakwater; and the outer diameter, inner diameter and opening size of two adjacent C-shaped resonators (4) in the array are gradually changed according to a certain rule. The gradual change rule needs to be determined according to the sea conditions of the target sea area combined with the Bloch band theory analysis; in the y direction, the size parameters and spacing of two adjacent C-shaped resonators 4 are the same; The C-shaped resonator (4) utilizes a large cavity with a small opening to induce resonance and attenuate long waves that are several times longer than the wavelength of the characteristic dimensions of the cylinder; The pile leg (1) is a tubular structure and has a flow guide component movably connected therein, and the lower end of the pile leg (1) is a conical structure; The base (2) is a box-shaped structure and is fixedly connected to an end cover (3) at its upper opening. A flow guiding structure is arranged inside the base (2). Two inlets (6) are provided on one side of the base (2) and are respectively connected to the flow guiding structure. Two outlets (35) are provided on the other side of the base (2) and are respectively connected to the flow guiding structure.

2. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 1 is characterized by: The guide assembly comprises a guide plate (11) of a special-shaped structure, a first strip opening (10) is provided on one side of the pile leg (1), a second strip opening (16) is provided on the other side of the pile leg (1), a plurality of rectangular through-holes (15) are provided on the side wall of the pile leg (1), screws are provided in the plurality of rectangular through-holes (15), and gaskets (13) are sleeved on the side walls of the screws, protrusions contacting the inner wall of the pile leg (1) are provided at the upper and lower ends of the guide plate (11), the screws are threadedly connected to the protrusions at the lower end of the guide plate (11), a plurality of pressure relief holes (14) are provided on the side wall of the pile leg (1), and the plurality of pressure relief holes (14) are symmetrically distributed on both sides of the second strip opening (16); The edge of the guide plate (11) forms a flow-through portion between the protrusion and the inner wall of the pile leg (1).

3. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 2 is characterized by: The side wall of the guide plate (11) is fixedly connected to a plurality of evenly distributed circular plates (12), and the circular plates (12) are located between two adjacent pressure relief holes (14). The guide plate (11) is provided with a diverter portion and two guide portions, and has a Y-shaped cross-section. The edge of the diverter portion faces the first strip-shaped opening (10), and the two guide portions respectively face the plurality of symmetrically distributed pressure relief holes (14), and the second strip-shaped opening (16) is located between the two guide portions.

4. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 1 is characterized by: The upper end of the pile leg (1) is fixedly connected to a connecting plate (9), and the connecting plate (9) is symmetrically provided with bending portions (7) at both ends, and the bending portions (7) are provided with right-angle clamping blocks (17), and the right-angle clamping blocks (17) are fixed to the lower end of the base (2), and one side of the right-angle clamping block (17) is threadedly connected to a fixing bolt (18) through a threaded hole, and the other two sides of the connecting plate (9) are provided with connecting portions, and the connecting portions are sleeved with screws, and the lower end of the base (2) is connected to the screws through the threaded holes.

5. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 4 is characterized by: A first arc-shaped groove is provided on one side of the right-angle clamping block (17), and the first arc-shaped groove is communicated with a threaded hole on one side of the right-angle clamping block (17). The bending portion (7) is provided with a second arc-shaped groove, and a positioning groove (21) is provided at the bending portion of the bending portion (7), and the second arc-shaped groove is communicated with the positioning groove (21). A positioning pin (20) is fixedly connected to one end of the fixing bolt (18), and the positioning pin (20) passes through the first arc-shaped groove and the second arc-shaped groove and extends into the positioning groove (21).

6. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 5 is characterized by: The upper end of the bending portion (7) is fixedly connected to two positioning blocks (8), and the lower end of the base (2) is provided with two blind holes (19) that match the positioning blocks (8), and the positioning blocks (8) are located in the blind holes (19).

7. The long-period wave reduction breakwater based on the water wave resonance principle according to claim 1 is characterized by: A circular ring (26) is sleeved at the lower opening of the C-shaped resonator (4); a cutout (22) corresponding to the position of the water inlet (5) is provided on the side wall of the circular ring (26); a plurality of arc-shaped blocks (24) are fixedly connected to the inner wall of the C-shaped resonator (4); a plurality of third strip-shaped openings (27) are provided on the side wall of the circular ring (26); a connecting bolt (28) is sleeved in each of the plurality of third strip-shaped openings (27); the arc-shaped blocks (24) are threadedly connected to the connecting bolts (28) via threaded holes; the plurality of arc-shaped blocks (24) form a pressure relief channel (25) between the C-shaped resonator (4) and the circular ring (26); and the circular ring (26) is coaxially fixed to the upper end of the end cover (3).

8. The long-period wave reducing breakwater based on the water wave resonance principle according to claim 1 is characterized by: The flow guiding structure comprises two first partitions (33) and two second partitions (34), and the first partitions (33) and the second partitions (34) are symmetrically distributed and divide the base (2) into a first channel (23) and a second channel (31), and the first partitions (33) and the second partitions (34) are both provided with two folded edges, and the two folded edges of the first partition (33) are not in contact with the inner wall of the base (2), and the two folded edges of the second partition (34) are in contact with the inner wall of the base (2).

9. The long-period wave reducing breakwater based on the water wave resonance principle according to claim 1 is characterized by: A pressure relief port (29) is provided on the side wall of the end cover (3), the pressure relief port (29) being in communication with the interior of the base (2); a drainage port (30) is provided on one side of the base (2), the drainage port (30) being located between two outlets (35); a flow baffle (32) is provided inside the base (2), the flow baffle (32) being located on one side of the drainage port (30).

10. The long-period wave reducing breakwater based on the water wave resonance principle according to claim 1, characterized in that: The breakwater is based on a central area consisting of 4×4 C-shaped resonators (4). In the area, the spacing between two adjacent C-shaped resonators (4) in the x direction is a1, and the spacing in the y direction is a2. Along the x direction, the spacing a1, the outer diameter, the inner diameter and the opening size of the two adjacent C-shaped resonators gradually change according to a certain rule. The specific values ​​and the gradual change rules of the gradual change parameters are determined according to the sea conditions of the target sea area combined with the Bloch band theory analysis. In the y direction, the size parameters and spacing of the two adjacent C-shaped resonators are the same. The number N and M of the C-shaped resonator (4) array is determined according to the main frequency range of the waves in the target sea area and the size of the required sheltered waters. The larger N is, the wider the frequency domain range of wave elimination is, and the larger M is, the larger the sheltered waters area is.

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