Design method for wave absorbing bank in pool with combined perforated plate and wave absorbing device of wave absorbing bank

Abstract

The invention relates to the technical field of wave absorbing devices, and discloses a method for designing a wave absorbing bank in a pool of a combined perforated plate and a wave absorbing device thereof, and the method comprises the following steps: measuring the length # imgabs0 #, the width # imgabs1 # and the water depth # imgabs2 # of an experimental pool, determining the maximum wavelength # imgabs3 # and the wave steep range generated by a wave maker, and determining the total length # imgabs5 # of the wave absorbing device according to # imgabs4 #, the length of the vertical perforated plate section is # imgabs7 #; a first-layer inclined perforated plate is arranged, a PVC perforated plate with the porosity of # imgabs 8 is adopted, the aperture of # imgabs 9, the plate thickness of # imgabs 10 and the installation angle of # imgabs 11 are determined through experimental optimization within the range of # imgabs 12, the rear end of a plate body is flush with the free liquid level, and the immersion depth of the front end of the plate body is # imgabs 13. The design method of the wave absorbing bank in the pool of the combined perforated plate and the wave absorbing device of the wave absorbing bank aim at solving the problems that in an existing pool wave absorbing technology, the wave absorbing bank is not compact enough in design, a large pool testing length is occupied, and the absorbing efficiency of non-linear large waves is poor.

Description

Technical Field

[0001] The invention relates to the technical field of wave-breaking devices, in particular to a design method for a wave-breaking bank in a pool with a combined porous plate and a wave-breaking device thereof. Background Art

[0002] With the rapid development of the shipping industry, this research field requires a large number of physical experimental tests, and wave pools / tanks are essential devices for conducting the above experiments. During the experiment, when waves are transmitted from the wave-making end of the pool to the end of the pool, wave reflections will be generated, which will interfere with the experiment and affect the accuracy of the experiment. Therefore, it is particularly necessary to add a wave-breaking device at the end of the pool. By adding a wave-breaking device at the end of the pool, the reflected waves can be effectively reduced, thereby realizing the ability to simulate the flow field of the open sea in a closed area and ensuring the experimental effect.

[0003] In the existing water pool wave-breaking technology, the wave-breaking bank design is generally not compact enough, which occupies a large amount of valuable water pool test length, which limits the effective use space of the water pool and affects the flexibility of scientific research and experiments. Secondly, the current design method mainly focuses on the wave-breaking effect of linear small waves, but lacks effective optimization means for the absorption efficiency of nonlinear large waves. As a result, in practical applications, facing complex and changeable wave conditions, the effectiveness of existing wave-breaking devices is greatly reduced. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the existing water pool wave-breaking technology that the wave-breaking bank design is not compact enough, occupies a large amount of water pool test length, and has poor absorption efficiency for nonlinear large waves, and to propose a wave-breaking bank design method in a water pool with a combined porous plate and a wave-breaking device.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A method for designing a wave-breaking bank in a pool with a combined porous plate comprises the following steps: S10. Measure the length of the experimental pool ,Width , water depth , determine the maximum wavelength generated by the wave machine and wave steepness range, and according to Determine the total length of the wave-breaking device , where the length of the inclined porous plate section is , the length of the vertical porous plate section is ; S20, arrange the first floor inclined porous plate, using porosity PVC porous plate, pore size , plate thickness , installation angle exist The range is determined by experimental optimization, the rear end of the plate is flush with the free liquid surface, and the front end is immersed in the depth ; S30, arranging multiple layers of inclined porous plates, setting n kinds of porosity and n kinds of plate spacing candidate values, performing combination tests, where n>2, evaluating the reflection coefficient, and determining the best porosity and plate spacing combination through iterative optimization; S40, vertical perforated plates are arranged in descending order of porosity. 5. Last layer , the middle layer decreases linearly ,in is the total number of layers, the board spacing , total length ; S50, Optimization of tilted plate angles through STARCCM+ numerical simulation The optimization goal is to reduce the number of physical experiments with the vertical plate porosity sequence. ; S60, at the wave-making plate of the wave-making machine , Two wave height meters are arranged at each location to record the wave surface time course. , using the GODA two-point method to solve the incident amplitude and reflected amplitude , the formula is

[0006] in is the distance between the two wave height meters, is the phase difference between the wave surface time histories recorded by the two wave height meters, is the wave number, where is the wavelength; S70. After obtaining the incident wave amplitude and the reflected wave amplitude, the ratio between the incident wave amplitude and the reflected wave amplitude needs to be corrected according to the nonlinear characteristics of the wave, and a correction factor is introduced for the nonlinear wave. , where the wave steepness Defined as the ratio of wave height to wavelength, the final reflection coefficient is calculated ; S80, establish VOF two-phase flow model through STARCCM+, use k-ωSST model turbulence model, grid size , to verify the wave-cutting effect, and to verify the ratio between the incident amplitude and the reflected amplitude for optimization and improvement.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, in the step S10, the distance between the installation position of the wave-breaking device and the wave-making plate is set to .

[0009] Furthermore, the installation angle of the inclined porous plate in step S20 is The optimization process is tested experimentally with a test step length of 2°. , gradually adjust and measure the reflection coefficient, and finally select the one with the lowest reflection coefficient value as the optimal installation angle.

[0010] Furthermore, in the step S60, the phase difference Calculated by Fourier analysis and satisfies the dispersion relation ,in is the circular frequency, is the acceleration due to gravity, is the wave number, For water depth.

[0011] A wave-breaking device in a pool with a combined porous plate, the wave-breaking device comprising: There are two first side panels, which are arranged parallel to each other; An inclined porous plate is arranged between the two first side plates, and a plurality of the inclined porous plates are arranged; The second side panels are fixedly mounted on the side ends of the first side panels, and the number and distribution positions of the second side panels are adapted to those of the first side panels; The vertical porous plate is arranged between the two second side plates, and is perpendicular to the second side plates.

[0012] Furthermore, slots are provided on the surfaces of opposite sides of the two first side plates, wherein the number of the slots is set to be several and equally divided into two groups, which are respectively arranged on the surfaces of the two first side plates, and the inclined porous plate is interference-connected between the two first side plates through the slots.

[0013] Furthermore, the slot is inclined with respect to the horizontal plane, wherein the inclination angle between the slot and the horizontal plane is between 10° and 20°.

[0014] Furthermore, a plurality of vertical placement grooves are evenly spaced on the surfaces of the opposite sides of the two second side plates, wherein the vertical porous plate is interference-connected between the two second side plates through the vertical placement grooves, and the number of the second side plates is set to be a plurality.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The present invention aims to solve the problem that the wave-breaking bank is not compact enough and occupies a large amount of the test length of the water pool. By measuring the size of the experimental water pool and the maximum wavelength and wave steepness range generated by the wave maker, the total length of the wave-breaking device is determined. This design minimizes the footprint of the wave-breaking device while ensuring the wave-breaking effect, thereby increasing the effective test length of the water pool and enhancing the flexibility of scientific research and experiments. Secondly, the prior art mainly focuses on the linear small wave absorbing effect, but has poor absorption efficiency for nonlinear large waves. The present invention adopts a multi-layer combined porous plate structure and adjusts the pore size of each layer of the porous plate. The parameters such as rate, aperture, plate thickness, installation angle and plate spacing were designed and optimized. By adjusting the porosity increment sequence and plate spacing of the inclined porous plates, effective wave absorption of waves with different wavelengths and wave heights, especially nonlinear large waves, was achieved. This not only improved the adaptability of the wave absorption device to complex wave conditions, but also significantly improved the wave absorption efficiency. The STAR-CCM+ numerical simulation technology was also used to optimize the inclined plate angle and the vertical plate porosity sequence, which greatly reduced the number of physical experiments, thereby reducing the R&D cost and cycle. At the same time, the GODA two-point method was used to solve the incident wave amplitude. and reflected amplitude , and introduce the correction factor The nonlinear wave is corrected to make the calculation of the reflection coefficient more accurate and reliable. Finally, the VOF two-phase flow model is established through STAR-CCM+ and the k-ωSST turbulence model is used for numerical simulation. The grid size is refined to , further verified the actual effect of the wave-absorbing device, which not only solved the problems of design compactness and wave-absorbing efficiency in the existing technology, but also improved the design efficiency and accuracy through the introduction of numerical simulation technology, providing a more efficient, reliable and flexible testing environment for physical experiments and scientific research in the shipbuilding industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a wave-breaking device in a pool with a combined porous plate.

[0017] In the figure: 1, first side plate; 2, inclined porous plate; 3, second side plate; 4, vertical porous plate; 5, slot; 6, vertical placement slot. DETAILED DESCRIPTION

[0018] 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. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides a method for designing a wave-breaking bank in a pool with a combined porous plate, comprising the following steps: S10. Measure the length of the experimental pool ,Width , water depth , determine the maximum wavelength generated by the wave machine and wave steepness (wave steepness = wave height / wavelength) range, and according to Determine the total length of the wave-breaking device , where the length of the inclined porous plate section is , the length of the vertical porous plate section is , wherein in S10, by understanding the basic size and wave characteristics of the water pool, a basis is provided for subsequent design, ensuring that the total length of the wave absorbing device matches the size of the water pool and the wave characteristics, thereby improving the wave absorbing effect; S20, arrange the first floor inclined porous plate, using porosity PVC porous plate, pore size , plate thickness , installation angle exist The range is determined by experimental optimization, the rear end of the plate is flush with the free liquid surface, and the front end is immersed in the depth , wherein in S20 , the wave energy is initially dissipated by tilting the porous plate, the tilting porous plate can guide the wave flow direction, and dissipate part of the wave energy through the pores, thereby reducing the reflection of the wave; S30, arrange multiple layers of inclined porous plates, set n kinds of porosity and n kinds of plate spacing candidate values, conduct combination tests, where n>2, evaluate the reflection coefficient, and determine the best porosity and plate spacing combination through iterative optimization. For example, there are 25 working conditions for the combination of 5 kinds of porosity and 5 kinds of plate spacing that need to be tested and combined. Test the results under different schemes, and finally obtain the porosity and plate spacing combination with the best wave-breaking effect. In S30, the wave energy is further dissipated through the combination of multiple layers of inclined porous plates. The best porosity and plate spacing combination is determined through iterative optimization, so that the multiple layers of inclined porous plates can dissipate wave energy more effectively and reduce the reflection coefficient. S40, vertical perforated plates are arranged in descending order of porosity. , the last layer , the middle layer decreases linearly ,in is the total number of layers, the board spacing , total length , where the remaining wave energy is further dissipated by vertical porous plates at S40. The vertical porous plates are arranged in decreasing porosity, which can better adapt to waves of different wave heights, further reduce the reflection coefficient, and improve the wave absorption effect; S50, Optimization of tilted plate angles through STARCCM+ numerical simulation The optimization goal is to reduce the number of physical experiments with the vertical plate porosity sequence. At the same time, STARCCM+ software was used for numerical simulation to optimize the angle of the inclined porous plate. and vertical porous plate porosity series. According to the size of the experimental pool and the parameters of the porous plate, a corresponding numerical model was established. The influence of the inclined porous plate on the waves was studied. At the same time, the dissipation effect of vertical porous plates with different porosity sequences on the waves was simulated. By comparing multiple combinations, the optimal porosity sequence was determined, that is, the porosity was arranged from large to small to minimize the reflection of the waves and the re-radiation of energy. In S50, the installation angle of the inclined porous plate and the porosity sequence of the vertical porous plate were further optimized through numerical simulation technology, which reduced the number of physical experiments, shortened the experimental cycle, and improved the accuracy and reliability of the design. S60, at the wave-making plate of the wave-making machine , Two wave height meters are arranged at each location to record the wave surface time course. , using the GODA two-point method to solve the incident amplitude and reflected amplitude , the formula is

[0020] in is the distance between the two wave height meters, is the phase difference between the wave surface time histories recorded by the two wave height meters, is the wave number, where is the wavelength; in the experimental pool, it is also based on the maximum wavelength of the waves generated by the wave-making board , at a distance of and Two wave height meters are arranged at the positions of and , through these two time history data, the GODA two-point method can be used to calculate the incident amplitude and reflected amplitude ; Specifically, the GODA two-point method measures the wave surface height at two different positions and calculates the phase difference and wave number difference between them to solve the amplitude of the incident wave and the reflected wave. This method has high precision and reliability and can accurately reflect the propagation and reflection of waves in front of the wave-breaking bank. In S60, the incident wave amplitude and the reflected wave amplitude are calculated by measuring and analyzing wave data, which provides important parameters for evaluating the wave-breaking effect. It also helps to correct nonlinear waves in subsequent steps. Nonlinear waves refer to the wave forms corresponding to a series of nonlinear effects caused by the interaction between waves and the experimental pool during propagation, which leads to changes in wave form. S70. After obtaining the incident wave amplitude and the reflected wave amplitude, the ratio between the incident wave amplitude and the reflected wave amplitude needs to be corrected according to the nonlinear characteristics of the wave, and a correction factor is introduced for the nonlinear wave. , where the wave steepness Defined as the ratio of wave height to wavelength, the final reflection coefficient is calculated , for nonlinear waves, a correction factor is introduced To calculate the reflection coefficient more accurately , correction factor It is a steep wave The function of , where the wave steepness It is the ratio of the wave amplitude to the wavelength, which reflects the nonlinearity of the wave. When calculating the reflection coefficient C_r, the incident wave amplitude is first obtained using the GODA two-point method. and reflected amplitude , and then substitute these two values ​​into the revised reflection coefficient formula By this method, a more accurate reflection coefficient value can be obtained, so as to better evaluate the wave-breaking effect of the wave-breaking bank. In S70, the influence of nonlinear waves is considered, the reflection coefficient is corrected, the calculation accuracy of the reflection coefficient is improved, and the evaluation of the wave-breaking effect is more reliable. The reflection coefficient is the ratio of the incident wave amplitude to the reflected wave amplitude. It should also be noted that only by measuring and analyzing the accurate incident wave amplitude and reflected wave amplitude can the influence of nonlinear waves be further considered and the reflection coefficient is corrected. In S70, the calculation accuracy of the reflection coefficient is improved, which provides a more reliable data basis for the numerical simulation in S80. Nonlinear waves do not directly refer to the incident wave amplitude, reflected wave amplitude, and wave phase, frequency and other parameters, but refer to the wave morphology corresponding to a series of nonlinear effects caused by the interaction between the wave and the experimental pool during the propagation process. The characteristics of nonlinear waves are the irregularity of their waveforms, the asymmetry of wave heights, and the interaction between waves, which are all caused by the influence of various nonlinear factors on the waves during the propagation process. S80, establish VOF two-phase flow model through STARCCM+, use k-ωSST model turbulence model, grid size , the ratio between the incident wave amplitude and the reflected wave amplitude is verified for optimization and improvement; in order to verify the wave-breaking effect of the wave-breaking bank, the VOF two-phase flow model is established again using the STARCCM+ software. In this model, the k-ωSST turbulence model is used to describe the turbulent characteristics of the waves. At the same time, in order to ensure the accuracy of the simulation, a fine grid with a grid size less than or equal to 0.01λ_max is set. By simulating the propagation and reflection process of the waves in front of the wave-breaking bank, the wave height distribution and energy dissipation of the waves behind the wave-breaking bank can be obtained. By comparing and analyzing these simulation results with the experimental results, it can be verified whether the wave-breaking effect of the wave-breaking bank meets the design requirements. In S80, the VOF is established through numerical simulation technology. The two-phase flow model verifies the wave breaking effect, intuitively displays the wave breaking process, and evaluates the wave breaking effect, providing a basis for subsequent optimization and improvement. S80 is the process of verifying and applying the reflection coefficient corrected by S70. By establishing the VOF two-phase flow model, the wave breaking process can be intuitively displayed and the wave breaking effect can be evaluated, thereby verifying the effectiveness of the correction factor introduced in S70. The correction result of S70 needs to be verified and applied by S80 to guide subsequent optimization and improvement work. In summary, the basic wave data is first obtained through S60, and then corrected by S70 considering nonlinear characteristics, and finally verified and applied by numerical simulation through S80. This process not only ensures the accuracy of the data, but also improves the reliability and practicality of the research.

[0021] Example Physics experiment pool: Dimensions: 6 meters long, 0.35 meters wide, and 1.01 meters high, providing a stable wave environment for the experiment.

[0022] Water depth: 0.735 meters, ensuring that the waves have sufficient depth to exhibit their dynamic characteristics during propagation.

[0023] Wave-making range: wavelength 0.5 to 2 meters, amplitude 0 to 50 mm, covering a wide range of wave conditions, facilitating testing of wave-breaking bank performance.

[0024] Multiwell plate parameters: Size: 450mm long, 336mm wide, 5mm thick, ensuring the perforated plate has sufficient strength and stability.

[0025] Porosity and pore size: According to the experimental requirements, five porous plates with different porosities and pore sizes were designed as shown in Table 1 to test their dissipation effects on wave energy.

[0026] Table 1 Multi-well plate parameters

[0027] Side panel parameters: Inclined side panels: 850 mm long, 400 mm wide, 1 cm thick, designed with inclined convex grooves with an inclination angle of 12°, used to fix the inclined perforated plates and guide waves.

[0028] Vertical side panels: 765 mm long, 396.4 mm wide, 1 cm thick, designed with horizontal and vertical grooves for fixing vertical porous plates.

[0029] Design and implementation steps Arrangement of inclined perforated plate: The first layer of porous plates (porosity 0.1) is placed near the free liquid surface with a front immersion depth of 0.0735 m to maximize the absorption of wave energy.

[0030] Through experimental testing, a porous plate with a porosity of 0.3 was selected as the second layer and placed 1.5 cm away from the first layer of porous plates to further optimize the wave-breaking effect.

[0031] The third layer of porous plates has a porosity of 0.1 and is placed 5.5 cm away from the first layer of porous plates to further dissipate wave energy.

[0032] Subsequently, multiple layers of inclined porous plates were added, with the porosity of each layer decreasing in sequence (two plates each at 0.5, 0.4, 0.3, and 0.2), and the spacing between the plates was 1.5 cm, until the wave-absorbing effect was optimal.

[0033] Arrange vertical perforated plates: The porosity of the vertical porous plates is arranged from large to small (from 0.5 to 0.2, with a linear decrease in the middle layer), and the spacing between the plates and the total length are optimized according to the wave conditions to ensure that the energy can be fully dissipated when the waves pass through.

[0034] The upper edge of the vertical perforated plate is fixed at 65 mm of the vertical side plate to ensure that the waves can smoothly contact and pass through the perforated plate during propagation.

[0035] Assembly and testing: The inclined perforated plates are assembled with the inclined side plates, and the vertical perforated plates are assembled with the vertical side plates respectively to ensure that the structure is stable and easy to adjust.

[0036] The assembled wave-breaking bank was placed in a physical experimental water pool and a wave simulation experiment was carried out to test its wave-breaking performance.

[0037] Experimental results and analysis Reflection coefficient: The reflection coefficient tests were conducted for waves with different wavelengths and wave steepness, as shown in Table 2. The experimental results show that under the conditions of wave steepness of 3% and 9%, the reflection coefficients of each wavelength are low, indicating that the wave elimination effect is significant.

[0038] Especially under the condition of large wave steepness, the wave steepness is 9%, the average reflection coefficient is only less than 7%, and the corresponding energy absorption efficiency is as high as more than 99.28%, which fully proves the effectiveness of the wave-breaking bank design.

[0039] Table 2 Wavelength elimination efficiency at different wavelengths

[0040] Wave elimination principle: When the wave is transmitted to the inclined porous plate, the propagation path and speed of the wave are changed, and the energy of the wave is consumed. Considering the water depth and pressure factors, it can be known that when the wave passes through the inclined porous plate, due to the pores distributed on the porous plate and the pressure difference between the upper and lower porous plates, the wave is deformed and broken, the pressure is reduced, and the wave energy is lost, so that the purpose of wave breaking is achieved. Since the inclined porous plate cannot completely consume the wave energy, the broken wave will continue to be transmitted backward to the vertical porous plate. The porosity of the vertical porous plate is arranged from large to small. The vertical porous plate with large porosity can reduce the wave reflection caused by the direct collision of the wave and allow the wave to pass through. The vertical porous plate with small porosity further dissipates the wave energy through the interaction between the wave and the pores to achieve further wave breaking. Under the interaction between large and steep waves and multiple vertical porous plates, the wave breaking effect of nonlinear waves is improved.

[0041] In a preferred embodiment of the present invention, the installation position of the wave-breaking device in step S10 is set to a distance from the wave-making plate of By installing the wave-breaking device at a specified location, it can be ensured that the wave has experienced a sufficient propagation distance before reaching the wave-breaking device, thereby achieving full development of the wave. The wave may encounter boundaries or obstacles during propagation and produce reflections. Setting the wave-breaking device at a specified location can effectively reduce the interference caused by wave reflection to the wave-making board and the experimental area, ensuring the accuracy and stability of the experimental results.

[0042] In a preferred embodiment of the present invention, the inclined porous plate installation angle in step S20 is further configured as follows: The optimization process is tested experimentally with a test step length of 2°. , gradually adjust and measure the reflection coefficient, and finally select the one with the lowest reflection coefficient The value is taken as the optimal installation angle, and the installation angle of the inclined perforated plate is precisely adjusted. , effectively reducing the wave reflection coefficient. Experimental tests show that when When the value is optimized to the lowest reflection coefficient, the reflection interference encountered by the wave during propagation is significantly reduced. This improvement not only improves the stability of the experimental environment and makes the wave shape closer to the natural state, thereby enhancing the accuracy and credibility of the experimental results, but also reduces wave reflections and helps protect experimental equipment from unnecessary impact and damage, thus extending the service life of the equipment.

[0043] In a preferred embodiment of the present invention, the phase difference in step S60 can be further configured as follows: Calculated by Fourier analysis and satisfies the dispersion relation ,in is the circular frequency, is the acceleration due to gravity, is the wave number, is the water depth. The dispersion relation describes the propagation characteristics of waves at different frequencies and wavelengths. In this formula, and Through and A nonlinear relationship is established. When it is much larger than the wavelength (i.e. deep water), Approaching 1, the formula is simplified to , which is the dispersion relation for deep water waves. When the wavelength is equal to or smaller (i.e. shallow water), The value of and The relationship between them causes the dispersion characteristics of shallow water waves to be different from those of deep water waves. This not only improves the accuracy of the GODA two-point method in wave measurement, but also provides more reliable technical support for the calculation of wave parameters and the study of wave propagation characteristics.

[0044] A wave-breaking device in a pool with a combined porous plate, the wave-breaking device comprising: The first side panels 1 are two in number and are arranged parallel to each other; The inclined porous plate 2 is arranged between the two first side plates 1, and the number of the inclined porous plate 2 is several; The second side panels 3 are fixedly mounted on the side ends of the first side panels 1, and the number and distribution positions thereof are adapted to the first side panels 1; The vertical porous plate 4 is disposed between the two second side plates 3 , and is perpendicular to the second side plates 3 .

[0045] The wave-breaking device includes two mutually parallel first side plates 1, which provide a stable support frame for the entire device. A plurality of inclined porous plates 2 are arranged between the first side plates 1. These inclined porous plates 2 change the propagation path and speed of the waves, and utilize the pores and the pressure difference between the upper and lower parts to cause the waves to deform and break when in contact, thereby effectively consuming the wave energy. The inclination angle and porosity design of the inclined porous plates 2 are carefully calculated and optimized to ensure the best wave-breaking effect.

[0046] In addition, the wave-breaking device also includes a second side plate 3 fixedly mounted on the side end of the first side plate 1. The number and distribution position of the second side plates 3 are adapted to the first side plate 1, and they together constitute the side wall of the device, providing support for the installation of the vertical porous plate 4. Between the two second side plates 3, a vertical porous plate 4 is arranged perpendicular to the second side plates 3. The vertical porous plate 4 further dissipates the wave energy, and through the interaction between the pores and the waves, the wave-breaking effect of the nonlinear wave is enhanced. The porosity and pore size of the vertical porous plate 4 are also optimized to ensure that the wave can fully dissipate energy when passing through.

[0047] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown; slots 5 are provided on the surfaces of the opposite sides of the two first side plates 1, wherein the number of the slots 5 is set to be several and equally divided into two groups, which are respectively arranged on the surfaces of the two first side plates 1, and the inclined porous plate 2 is interference connected between the two first side plates 1 through the slots 5. The inclined porous plate 2 no longer relies on traditional bolt connection or welding methods, but realizes interference connection with the two first side plates 1 through the slots 5. This interference connection method not only simplifies the installation steps and improves the installation efficiency, but also ensures the close fit between the inclined porous plate 2 and the first side plate 1, and effectively prevents loosening or falling off under the impact of waves. During the working process, the wave first contacts the inclined porous plate 2. Since the inclined porous plate 2 is tightly connected to the first side plate 1 through the slots 5, when the wave hits the inclined porous plate 2, it can make full use of the wave-absorbing characteristics of the porous structure, and deform, break and dissipate energy. At the same time, the design of the slots 5 also enhances the stability of the inclined porous plate 2 under the impact of waves, so that it can better play a wave-absorbing role.

[0048] In a preferred embodiment, the present invention can be further configured as follows: Figure 1As shown; the slot 5 is inclined with respect to the horizontal plane, wherein the inclination angle between the slot 5 and the horizontal plane is between 10° and 20°. The design of the inclination angle between 10° and 20°, within this range of inclination angles, can ensure that the waves are subjected to sufficient resistance when passing through the wave-breaking device, while avoiding the situation where the waves directly pass over the inclined porous plate 2 and cannot be effectively broken due to excessive inclination angles. Therefore, this inclination setting not only improves the wave-breaking efficiency, but also ensures the stability and reliability of the wave-breaking device under various wave conditions.

[0049] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown; a plurality of vertical placement grooves 6 are evenly spaced on the surfaces of the opposite sides of the two second side plates 3, wherein the vertical porous plate 4 is connected between the two second side plates 3 by the vertical placement grooves 6, wherein the number of the second side plates 3 is set to be several, and the vertical porous plate 4 can be stably and tightly installed between the two second side plates 3 through the interference connection of the vertical placement grooves 6. This interference connection method not only simplifies the installation steps and improves the installation efficiency, but also ensures the stability of the vertical porous plate 4 under the impact of waves, and prevents the reduction of the wave-breaking effect caused by loosening or falling off. The number of the second side plates 3 is set to be several, and this design enables the wave-breaking device to be expanded or reduced according to actual needs, so as to adapt to different water environments and wave-breaking requirements. At the same time, the vertical placement grooves 6 opened at equal intervals ensure the uniform distribution of the vertical porous plates 4 between the second side plates 3, which not only improves the overall stability of the wave-breaking device, but also enables the waves to receive a more uniform wave-breaking effect when passing through the wave-breaking device. During the working process, the wave first contacts the vertical porous plate 4. Since the vertical porous plate 4 is tightly connected to the second side plate 3 through the vertical placement groove 6, when the wave hits the vertical porous plate 4, it can make full use of the wave-absorbing characteristics of the porous structure to deform, break and dissipate energy. At the same time, the design of the vertical placement groove 6 also enhances the stability of the vertical porous plate 4 under wave impact, so that it can better play a wave-absorbing role.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] 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 method for designing a wave-breaking bank in a pool with a combined porous plate, characterized in that: The following steps are involved: S10. Measure the length of the experimental pool ,Width , water depth , determine the maximum wavelength generated by the wave machine and wave steepness range, and according to Determine the total length of the wave-breaking device , where the length of the inclined porous plate section is , the length of the vertical porous plate section is ; S20, arrange the first floor inclined porous plate, using porosity PVC porous plate, pore size , plate thickness , installation angle exist The range is determined by experimental optimization, the rear end of the plate is flush with the free liquid surface, and the front end is immersed in the depth ; S30, arranging multiple layers of inclined porous plates, setting n kinds of porosity and n kinds of plate spacing candidate values, performing combination tests, where n>2, evaluating the reflection coefficient, and determining the best porosity and plate spacing combination through iterative optimization; S40, vertical perforated plates are arranged in descending order of porosity.

5. Last layer , the middle layer decreases linearly ,in is the total number of layers, the board spacing , total length ; S50, Optimization of tilted plate angles through STARCCM+ numerical simulation With vertical plate porosity sequence, the number of physical experiments can be reduced, and the experimental cycle can be reduced ; S60, at the wave-making plate of the wave-making machine , Two wave height meters are arranged at each location to record the wave surface time course. , using the GODA two-point method to solve the incident amplitude and reflected amplitude , the formula is in is the distance between the two wave height meters, is the phase difference between the wave surface time histories recorded by the two wave height meters, is the wave number, where is the wavelength; S70. After obtaining the incident wave amplitude and the reflected wave amplitude, the ratio between the incident wave amplitude and the reflected wave amplitude needs to be corrected according to the nonlinear characteristics of the wave, and a correction factor is introduced for the nonlinear wave. , where the wave steepness Defined as the ratio of wave height to wavelength, the final reflection coefficient is calculated ; S80, establish VOF two-phase flow model through STARCCM+, use k-ωSST model turbulence model, grid size , the ratio between the incident amplitude and the reflected amplitude is verified for optimization and improvement.

2. The method for designing a wave-breaking bank in a pool with a combined porous plate according to claim 1, characterized in that: The distance between the installation position of the wave-breaking device and the wave-making plate in step S10 is set to .

3. The method for designing a wave-breaking bank in a pool with a combined porous plate according to claim 1, characterized in that: The inclined multi-well plate installation angle in step S20 The optimization process is tested experimentally with a test step length of 2°. , gradually adjust and measure the reflection coefficient, and finally select the one with the lowest reflection coefficient value as the optimal installation angle.

4. The method for designing a wave-breaking bank in a pool with a combined porous plate according to claim 1, characterized in that: The phase difference in step S60 Calculated by Fourier analysis and satisfies the dispersion relation ,in is the circular frequency, is the acceleration due to gravity, is the wave number, For water depth.

5. A wave-breaking device designed according to the method for designing a wave-breaking bank in a pool with a combined porous plate according to any one of claims 1 to 4, characterized in that: The wave-breaking device comprises: Two first side plates (1) are arranged parallel to each other; An inclined porous plate (2) is arranged between the two first side plates (1), and a plurality of inclined porous plates are provided; The second side panels (3) are fixedly mounted on the side ends of the first side panels (1), and the number and distribution positions of the second side panels (3) are compatible with those of the first side panels (1); The vertical porous plate (4) is arranged between the two second side plates (3), and is arranged perpendicular to the second side plates (3).

6. A wave-breaking device in a pool with a combined porous plate according to claim 5, characterized in that: Slots (5) are provided on surfaces of opposite sides of the two first side plates (1), wherein the number of the slots (5) is set to be equal and divided into two groups, which are respectively arranged on the surfaces of the two first side plates (1); the inclined porous plate (2) is interference-connected between the two first side plates (1) via the slots (5).

7. A wave-breaking device in a pool with a combined porous plate according to claim 6, characterized in that: The slot (5) is arranged at an inclination with respect to the horizontal plane, wherein the inclination angle between the slot (5) and the horizontal plane is between 10° and 20°.

8. The wave-breaking device in a pool with a combined porous plate according to claim 5, characterized in that: A plurality of vertical placement grooves (6) are provided at equal intervals on the surfaces of one side opposite to the two second side plates (3), wherein the vertical porous plate (4) is interference-connected between the two second side plates (3) via the vertical placement grooves (6), wherein the number of the second side plates (3) is set to be a plurality.

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