A design method and system of a floating structure adaptive to sea surface wave

Abstract

This invention proposes an adaptive floating structure design method and system for sea surface fluctuations, belonging to the field of floating structure design technology. Addressing the problem of low safety in existing floating structures, this invention designs a grid-like floating structure and connecting structures; determines the maximum wave steepness parameter based on the wave conditions of the target sea area; calculates the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, ensuring that the ratio of the connecting structure extension scale to the grid cell size meets the theoretical value of the deep-water wave breaking limit; constructs a floating structure simulation model, simulates the floating structure under different wave conditions, and adjusts the grid cell size based on the simulation results until the simulation results meet the preset safety conditions; after adjusting the grid cell size based on the simulation results, the extension scale of the connecting structure is recalculated based on the adjusted grid cell size to determine the final floating structure design parameters. The floating structure designed by this invention has high safety.

Description

Technical Field

[0001] This invention relates to the field of floating structure design technology, and in particular to a floating structure design method and system that adapts to sea surface fluctuations. Background Technology

[0002] With the continuous growth in demand for clean energy, offshore photovoltaic power generation technology has developed rapidly. Floating structures are the key support carriers for photovoltaic power generation systems in the marine environment. However, the marine environment is complex and changeable, and dynamic loads such as waves and tides pose severe challenges to floating structures.

[0003] Currently, floating photovoltaic structures at sea mainly employ two design schemes: rigid connection structures and flexible connection structures. Rigid connection structures resist wave impact by strengthening the structure, but they cannot disperse forces, leading to stress concentration at the connection points. Flexible connection structures use simple flexible connectors, but lack precise adaptation to wave characteristics, resulting in significant stress concentration at the connection points and failing to effectively reduce the wave load on the overall floating structure. These problems in existing technologies lead to lower safety for floating structures.

[0004] Therefore, developing an adaptive floating structure design method and system for sea surface fluctuations is of great significance for improving the safety of floating structures. Summary of the Invention

[0005] To address the issue of low safety in existing floating structures, this invention proposes a floating structure design method that adapts to sea surface fluctuations, specifically including the following steps: S1. Design a grid-like floating structure and set up a connection structure between adjacent grid cells; S2. Determine the maximum wave steepness parameter based on the wave conditions of the target sea area; S3. Calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. S4. Construct a simulation model of the floating structure based on the designed grid cells, connection structure, and wave conditions of the target sea area; S5. In the simulation model, the floating structure under different wave conditions is simulated to obtain the simulation results. The size of the mesh unit is adjusted according to the simulation results until the simulation results meet the preset safety conditions. In this process, after adjusting the mesh cell size based on the simulation results, the adjusted mesh cell size is input into S3 to recalculate the extension scale of the connection structure. S6. The mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions are used as the final floating structure design parameters.

[0006] Furthermore, in S3, the extension scale of the connection structure is calculated based on the grid cell size and the maximum wave steepness parameter, including multiplying the side length of the grid cell and the maximum wave steepness parameter to obtain the extension scale of the connection structure.

[0007] Furthermore, the side length of a grid cell refers to the length of the side of the grid cell that is parallel to the wave direction.

[0008] Furthermore, in S5, the floating structure under different wave conditions is simulated in the simulation model to obtain simulation results, including: loading wave conditions with multiple return periods for the target sea area into the simulation model; performing time-domain coupling analysis for wave conditions with different return periods for the target sea area to obtain simulation results, wherein the simulation results include: the maximum instantaneous tension value of the connecting structure when passing through the wave crest, and the minimum gap value of adjacent grid cells when converging at the wave trough.

[0009] Furthermore, in step S5, the mesh cell size is adjusted based on the simulation results until the simulation results meet the preset safety conditions. This includes: reducing the mesh cell size when the maximum instantaneous tension value exceeds the preset tension limit value; increasing the mesh cell size when the maximum instantaneous tension value is less than the preset tension limit value and the difference is greater than the preset difference value; calculating the extension scale of the connection structure based on the adjusted mesh cell size to obtain the adjusted extension scale of the connection structure; and inputting the adjusted extension scale of the connection structure and the adjusted mesh cell side length into the floating structure simulation model for simulation until the simulation results meet the preset safety conditions.

[0010] Furthermore, the preset safety conditions include: the maximum instantaneous tension value meets the safety threshold, and the adjacent grid cells take the maximum value of the grid cell size under the condition of no collision.

[0011] Furthermore, in step S2, determining the maximum wave steepness parameter based on the wave conditions of the target sea area includes: collecting historical hydrological and meteorological data of the target sea area and extracting wave-related parameters; determining the wave steepness values ​​under different wave return periods based on the wave-related parameters; and determining the maximum wave steepness parameter by combining the wave steepness values ​​under different wave return periods and the theoretical value of deep-water wave breaking limit.

[0012] Furthermore, in S1, a grid-like floating structure is designed, and a connection structure is set between adjacent grid units, including: adopting an orthogonal connection mode, and connecting each grid unit with its adjacent grid units in the front, back, left, and right directions through a loop connection structure by connecting corner to corner.

[0013] Furthermore, the shackle connection structure is made of flexible soft buckles or closed rope loops made of high-modulus polyethylene or aramid fiber.

[0014] The present invention also provides a floating structure design system for adaptive sea surface fluctuations, the system being used to execute the floating structure design method for adaptive sea surface fluctuations described in any of the preceding claims, the system comprising: The floating structure setting module is used to design a grid-like floating structure and set up connection structures between adjacent grid cells; The maximum wave steepness parameter determination module is used to determine the maximum wave steepness parameter based on the wave conditions of the target sea area. The extension scale calculation module is used to calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. The model building module is used to construct a simulation model of the floating structure based on the designed mesh cells, connection structure, and wave conditions of the target sea area. The simulation module is used to simulate floating structures under different wave conditions in the simulation model, obtain simulation results, and adjust the grid cell size according to the simulation results until the simulation results meet the preset safety conditions; in particular, after adjusting the grid cell size according to the simulation results, the extension scale of the connection structure is recalculated based on the adjusted grid cell size. The final parameter determination module is used to take the mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions as the final floating structure design parameters.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention designs a grid-like floating structure and establishes connecting structures between adjacent grid cells. Based on the wave conditions of the target sea area, the maximum wave steepness parameter is determined. The extension scale of the connecting structure is calculated based on the grid cell size and the maximum wave steepness parameter, ensuring that the ratio of the extension scale to the grid cell size meets the theoretical value of the deep-water wave breaking limit. A simulation model of the floating structure is constructed based on the designed grid cells, connecting structures, and the wave conditions of the target sea area. The floating structure is simulated under different wave conditions in the simulation model, and the grid cell size is adjusted according to the simulation results until the simulation results meet the preset safety conditions. Specifically, after adjusting the grid cell size based on the simulation results, the extension scale of the connecting structure is recalculated based on the adjusted grid cell size. The grid cell size and the extension scale of the connecting structure corresponding to the simulation results that meet the preset safety conditions are used as the final floating structure design parameters. By performing simulations in the simulation model and iteratively adjusting the grid cell size and recalculating the extension scale of the connecting structure based on the simulation results, the final design is ensured to meet the safety conditions of the floating structure, thus improving the safety of the floating structure. Meanwhile, the maximum wave steepness parameter is determined based on the wave conditions of the target sea area, and the extension scale of the connecting structure is calculated in combination with the theoretical value of the deep-water wave breaking limit. This makes the ratio of the connecting structure to the grid unit size more in line with the actual requirements, allowing the floating structure to accurately adapt to the wave characteristics of the sea area, achieve adaptive following of sea surface fluctuations, effectively reduce the impact of wave loads, and help improve the safety of the floating structure. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the adaptive sea surface wave floating structure design method provided in the embodiments of the present invention; Figure 2 This is a plan view of the grid-like floating structure provided in the embodiment of the present invention; Figure 3 This is a schematic diagram of a floating structure design system that adapts to sea surface fluctuations, provided in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] The specific embodiments of the present invention will be described below.

[0020] To address the issue of low safety in existing floating structures, this invention designs a grid-like floating structure and its connecting structure. Based on the wave conditions of the target sea area, the maximum wave steepness parameter is determined. Based on the grid cell size and the maximum wave steepness parameter, the extension scale of the connecting structure is calculated so that the ratio of the extension scale to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. A simulation model of the floating structure is constructed, and simulations are performed on the floating structure under different wave conditions. The grid cell size is adjusted based on the simulation results until the simulation results meet the preset safety conditions. After adjusting the grid cell size based on the simulation results, the extension scale of the connecting structure is recalculated based on the adjusted grid cell size to determine the final floating structure design parameters. The floating structure designed in this invention has high safety.

[0021] Example 1 This invention provides a method for designing a floating structure that adapts to sea surface fluctuations. Figure 1 This is a flowchart of the adaptive sea surface wave floating structure design method provided in an embodiment of the present invention, such as... Figure 1 As shown, the specific steps include the following: S1. Design a grid-like floating structure and set up a connection structure between adjacent grid cells.

[0022] A grid-like floating structure is a floating carrier composed of multiple standardized square or rectangular units arranged in an array. Each grid unit has a metal support for mounting photovoltaic modules on top and a closed-cell foam float on the bottom. The entire grid-like floating structure supports offshore photovoltaic panels and adapts to sea surface fluctuations. The grid unit is the basic building block of the grid-like floating structure, and each grid unit is rectangular or rectangular in shape. The connecting structure is a key component used to connect adjacent grid units, enabling the floating structure to flexibly adapt to waves.

[0023] Figure 2 This is a plan view of the grid-like floating structure provided in an embodiment of the present invention, as shown below. Figure 2As shown, a grid-like floating structure is designed, and a connection structure is set between adjacent grid units, including: adopting an orthogonal connection mode, and connecting each grid unit with its adjacent grid units in the four directions of front, back, left and right through a loop connection structure by connecting corner to corner.

[0024] At the four corner points of the grid unit, high-strength U-shaped connecting lugs or embedded buckles are pre-embedded or welded as hard points for force transmission. The collar connection structure uses flexible shackles or closed rope loops made of high-modulus polyethylene or aramid fiber. The orthogonal connection mode refers to the connection layout of the grid units, where each unit only connects with adjacent units in the four directions (front, back, left, and right) to form a regular array structure, without involving diagonal unit connections. The corner-to-corner connection method refers to adjacent grid units connecting through pre-set connecting lugs and buckles at their respective corners, concentrating the connection points at the unit corners to ensure balanced force transmission.

[0025] The grid-like floating structure uses orthogonal connections and corner docking to make the connection points regularly distributed. It is connected by flexible collars, which can effectively disperse wave loads, avoid local stress concentration, and allow the structure to deform flexibly with the waves to adapt to the characteristics of sea surface fluctuations.

[0026] S2. Determine the maximum wave steepness parameter based on the wave conditions of the target sea area.

[0027] The target sea area refers to the specific sea area where the floating structure is planned to be deployed, and the wave conditions are the relevant characteristic parameters of the waves within the target sea area. The maximum wave steepness parameter is a critical wave steepness value determined based on the wave characteristics of the target sea area. Specifically, it refers to the upper limit of the ratio of the maximum wave height to the corresponding wavelength under the design conditions of the target sea area, used to ensure the structure's flexible following capability under extreme sea conditions. For example, the maximum wave steepness parameter is taken as the theoretical value of the deep-water wave breaking limit, which is usually 1 / 7. In this embodiment, 1 / 7 is selected as the limit adaptation standard for the floating structure design to ensure the floating structure's flexible following capability under extreme sea conditions. Among them, the theoretical value of the deep-water wave breaking limit refers to the critical threshold at which waves can maintain their intact shape without breaking in deep-sea waters; essentially, it is the limit boundary of the wave's own structural stability.

[0028] Specifically, based on the wave conditions of the target sea area, the maximum wave steepness parameter is determined, including: collecting historical hydrological and meteorological data of the target sea area and extracting wave-related parameters; determining the wave steepness values ​​under different wave return periods based on the wave-related parameters; and determining the maximum wave steepness parameter by combining the wave steepness values ​​under different wave return periods and the theoretical value of deep-water wave breaking limit.

[0029] Historical hydrological and meteorological data refers to a systematic collection of data related to the marine environment and meteorology recorded through professional observation and monitoring methods over a relatively long period of time in a target sea area, such as the last 10-50 years. It serves as a fundamental data source reflecting the long-term patterns of wave, hydrological, and other natural characteristics of the sea area. Wave-related parameters are parameters directly related to wave characteristics selected from historical hydrological and meteorological data, including significant wave height, maximum wave height, mean period, and corresponding wavelength. Wave return period refers to the average time interval between the recurrence of waves of a specific intensity over a long period; different return periods correspond to different wave intensities. Wave steepness is a numerical value representing the steepness of waves, calculated using wave theory formulas: δ=H max / λ,H max λ represents the maximum wave height, and λ represents the corresponding wavelength.

[0030] Hydrological and meteorological data from the target deployment area over the past 10-50 years were collected, with a focus on extracting wave-related parameters such as significant wave height, maximum wave height, mean period, and corresponding wavelength. Based on wave theory formulas, the extracted maximum wave height and corresponding wavelength were substituted to calculate wave steepness values ​​for different wave return periods in the target sea area, ensuring that the parameters closely match the actual wave conditions of the sea area. Based on the calculated wave steepness values ​​for different return periods, and referring to the theoretical value of the deep-water wave breaking limit, the critical maximum wave steepness parameter under the design conditions of this sea area was finally determined. Using 1 / 7 of the deep-water wave breaking limit theoretical value as a constraint, this was used as the limit adaptation standard for the structural design. The final determined maximum wave steepness parameter not only conforms to the actual wave characteristics of the target sea area but also ensures the structure's flexible following capability under extreme sea conditions.

[0031] S3. Calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit.

[0032] The extension dimension of the connecting structure refers to the effective extension length of the collar used to connect adjacent grid units, that is, the effective length of the collar that can flexibly expand and contract, which is the core parameter to ensure that the structure can adapt to wave deformation.

[0033] Specifically, based on the grid cell size and the maximum wave steepness parameter, the extension scale of the connection structure is calculated, including multiplying the side length of the grid cell by the maximum wave steepness parameter to obtain the extension scale of the connection structure. Here, the side length of the grid cell refers to the length of the side of the grid cell parallel to the wave direction.

[0034] The extension dimensions of the connecting structure are calculated using a linear geometric relationship formula: E = L × δ max Where E represents the effective extension scale of the connection structure, L is the side length of the network unit, and δ maxThe maximum wave steepness parameter can be used to directly obtain the extension scale value of the connected structure. For example, when the grid cell side length L = 5m, the maximum wave steepness parameter δ max When the value is 1 / 7, substituting it into the formula, we get E = 5m × 1 / 7 ≈ 0.71m.

[0035] By forcing the ratio of the extension scale of the connecting structure to the side length of the grid cell to match the theoretical value of the deep-water wave breaking limit through a formula, the extension capacity of the connecting structure can be accurately matched with the wave characteristics of the target sea area. This ensures that the floating structure can flexibly follow the wave deformation under extreme sea conditions, effectively disperse wave loads, avoid stress concentration at the connection points, reduce the risk of structural fatigue failure, and lay a reliable foundation for subsequent simulation optimization and the safety and economy of the overall structure.

[0036] S4. Construct a simulation model of the floating structure based on the designed grid cells, connection structure, and wave conditions of the target sea area.

[0037] A floating structure simulation model is a virtual model constructed using hydrodynamic analysis software. It includes an array of element meshes and a flexible collar connection structure, capable of simulating the stress and deformation states of floating structures in a real marine environment. Based on the designed mesh element parameters, connection structure parameters, and wave conditions of the target sea area, the simulation model is constructed to ensure that it closely matches the actual design scheme and marine environment, guaranteeing the authenticity of the simulation results.

[0038] S5. In the simulation model, the floating structure under different wave conditions is simulated to obtain simulation results. The grid cell size is then adjusted based on the simulation results until the simulation results meet the preset safety conditions. Specifically, after adjusting the grid cell size based on the simulation results, the adjusted grid cell size is input into S3 to recalculate the extension scale of the connecting structure.

[0039] Specifically, the simulation model simulates the floating structure under different wave conditions and obtains simulation results, including: loading wave conditions with multiple return periods for the target sea area into the simulation model; performing time-domain coupling analysis for wave conditions with different return periods for the target sea area and obtaining simulation results, including: the maximum instantaneous tension value of the connecting structure when passing through the wave crest, and the minimum gap value of adjacent grid cells when converging at the wave trough.

[0040] Temporal coupling analysis refers to the process of simulating the dynamic interaction between a floating structure and waves by loading time-varying wave loads into the model, and accurately capturing the stress and displacement state of the structure at different time points.

[0041] In the constructed floating structure simulation model, wave data from multiple return periods for the target sea area are imported, covering wave conditions of varying intensities. For each return period wave condition, the model's time-domain coupled calculation is initiated to simulate the dynamic response of the structure during wave propagation. Finally, two core simulation results are output: the maximum instantaneous tension value of the collar when it passes through the wave crest, and the minimum gap value of adjacent grid cells when they converge at the wave trough.

[0042] The mesh cell size is adjusted based on the simulation results until the simulation results meet the preset safety conditions. This includes: reducing the mesh cell size when the maximum instantaneous tension value exceeds the preset tension limit; increasing the mesh cell size when the maximum instantaneous tension value is less than the preset tension limit and the difference is greater than the preset difference; calculating the extension scale of the connecting structure based on the adjusted mesh cell size; and inputting the adjusted extension scale of the connecting structure and the adjusted mesh cell side length into the floating structure simulation model for simulation until the simulation results meet the preset safety conditions. The preset safety conditions include: the maximum instantaneous tension value meets the safety threshold, and adjacent mesh cells take the maximum mesh cell size under the condition of no collision.

[0043] The maximum instantaneous tension value refers to the maximum instantaneous tensile force that the connection structure experiences when passing through a wave crest, as monitored during simulation. It is a core indicator for evaluating whether the strength of the connection structure meets the standards. The preset tension limit value refers to the allowable safe load of the material, which is the maximum tensile force threshold that the connection structure can withstand. Exceeding this value will lead to the breakage of the connection structure, and it is a critical standard for judging whether the tension is safe. The preset difference value is a reference threshold for judging the material utilization rate of the connection structure. When the difference between the maximum instantaneous tension value and the preset tension limit value exceeds this value, it indicates that the material is not being fully utilized and there is room for optimization.

[0044] Based on the initially set mesh cell size and corresponding connection structure extension scale, a time-domain coupling analysis is performed using a floating structure simulation model to obtain the maximum instantaneous tension value and the minimum gap value between adjacent cells, determining whether the preset safety conditions are met. If the maximum instantaneous tension value exceeds the preset tension limit value, it indicates that the wave-exposed area of ​​the cell is too large, and the mesh cell size needs to be reduced. If the maximum instantaneous tension value is less than the preset tension limit value, and the difference between the two is greater than the preset difference, it indicates low material utilization, and the mesh cell size needs to be increased. Based on the adjusted mesh cell size, the connection structure extension scale is recalculated to ensure that the ratio of the structure extension scale to the mesh cell size always conforms to the theoretical value of the deep-water wave breakage limit. The adjusted mesh cell size and the updated connection structure extension scale are input into the floating structure simulation model, and simulation analysis is performed again to obtain new maximum instantaneous tension values ​​and minimum gap values ​​between adjacent cells. The above iterative process of evaluation, adjustment, calculation, and simulation is repeated until the simulation results meet the preset safety conditions of maximum instantaneous tension value reaching the standard, no collision between adjacent cells, and mesh cell size being as large as possible, at which point the iteration stops.

[0045] By monitoring tension, adjusting dimensions, and iterative simulation, the risk of fracture due to excessive tension in the connecting structure and the risk of collision between adjacent units are precisely avoided, ensuring stable operation of the structure even under extreme sea conditions and reducing the probability of fatigue failure. Preset differential values ​​are used to determine material usage, avoiding material waste caused by excessive tension margins. Simultaneously, the mesh element size is maximized under safe conditions to improve the load-bearing efficiency per unit material, achieving a balance between economy and safety.

[0046] S6. The mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions are used as the final floating structure design parameters.

[0047] After multiple rounds of iterative simulation optimization, simulation results that meet preset safety conditions are selected. These conditions include: the maximum instantaneous tension value of the connecting structure is less than the allowable safe load of the material; adjacent mesh cells do not experience destructive rigid collisions when converging at wave troughs; and the mesh cell size reaches its maximum under safe conditions. The core parameter corresponding to this simulation result, the mesh cell size, is extracted. Based on the mesh cell size and the maximum wave steepness parameter, the extension scale of the connecting structure is calculated. These two sets of parameters are determined as the final floating structure design parameters, serving as the basis for subsequent structural fabrication, assembly, and engineering applications. The final design parameters are the optimal solution verified through theoretical calculations and multiple rounds of simulations. By accurately matching the wave characteristics of the target sea area, the safety of the floating structure under extreme sea conditions and its adaptability to sea surface fluctuations are ensured. Furthermore, the mesh cell size is maximized, improving material utilization.

[0048] This embodiment designs a grid-like floating structure and establishes connecting structures between adjacent grid cells. Based on the wave conditions of the target sea area, the maximum wave steepness parameter is determined. The extension scale of the connecting structure is calculated based on the grid cell size and the maximum wave steepness parameter, ensuring that the ratio of the extension scale to the grid cell size meets the theoretical value of the deep-water wave breaking limit. A simulation model of the floating structure is constructed based on the designed grid cells, connecting structures, and the wave conditions of the target sea area. The floating structure is simulated under different wave conditions in the simulation model, and the simulation results are obtained. The grid cell size is adjusted based on the simulation results until the simulation results meet the preset safety conditions. After adjusting the grid cell size based on the simulation results, the extension scale of the connecting structure is recalculated based on the adjusted grid cell size. The grid cell size and the extension scale of the connecting structure corresponding to the simulation results that meet the preset safety conditions are used as the final floating structure design parameters. By performing simulations in the simulation model and iteratively adjusting the grid cell size and recalculating the extension scale of the connecting structure based on the simulation results, the final design is ensured to meet the safety conditions of the floating structure, thus improving the safety of the floating structure. Meanwhile, the maximum wave steepness parameter is determined based on the wave conditions of the target sea area, and the extension scale of the connecting structure is calculated in combination with the theoretical value of the deep-water wave breaking limit. This makes the ratio of the connecting structure to the grid unit size more in line with the actual requirements, allowing the floating structure to accurately adapt to the wave characteristics of the sea area, achieve adaptive following of sea surface fluctuations, effectively reduce the impact of wave loads, and help improve the safety of the floating structure.

[0049] Example 2 This invention also provides a floating structure design system that adapts to sea surface fluctuations. Figure 3 This is a schematic diagram of a floating structure design system for adaptive sea surface fluctuations provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the system includes: The floating structure setting module is used to design a grid-like floating structure and set up connection structures between adjacent grid cells; The maximum wave steepness parameter determination module is used to determine the maximum wave steepness parameter based on the wave conditions of the target sea area. The extension scale calculation module is used to calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. The model building module is used to construct a simulation model of the floating structure based on the designed mesh cells, connection structure, and wave conditions of the target sea area. The simulation module is used to simulate floating structures under different wave conditions in the simulation model, obtain simulation results, and adjust the grid cell size according to the simulation results until the simulation results meet the preset safety conditions; in particular, after adjusting the grid cell size according to the simulation results, the extension scale of the connection structure is recalculated based on the adjusted grid cell size. The final parameter determination module is used to take the mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions as the final floating structure design parameters.

[0050] The adaptive sea surface wave floating structure design system provided in this embodiment is used to execute the adaptive sea surface wave floating structure design system method in any of the above embodiments, and has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a floating structure that adapts to sea surface fluctuations, characterized in that, include: S1. Design a grid-like floating structure and set up a connection structure between adjacent grid cells; S2. Determine the maximum wave steepness parameter based on the wave conditions of the target sea area; S3. Calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. S4. Construct a simulation model of the floating structure based on the designed grid cells, connection structure, and wave conditions of the target sea area; S5. In the simulation model, the floating structure under different wave conditions is simulated to obtain the simulation results. The size of the mesh unit is adjusted according to the simulation results until the simulation results meet the preset safety conditions. In this process, after adjusting the mesh cell size based on the simulation results, the adjusted mesh cell size is input into S3 to recalculate the extension scale of the connection structure. Specifically, the simulation model simulates floating structures under different wave conditions, and the simulation results include: In the simulation model, wave conditions with multiple return periods are loaded for the target sea area; For wave conditions with different return periods in the target sea area, a time-domain coupled analysis was performed to obtain simulation results. The simulation results include: the maximum instantaneous tension value of the connecting structure when passing through the wave crest, and the minimum gap value of adjacent grid cells when converging at the wave trough. The mesh cell size is adjusted based on the simulation results until the simulation results meet the preset safety conditions, including: When the maximum instantaneous tension value exceeds the preset tension limit value, reduce the mesh cell size; When the maximum instantaneous tension value is less than the preset tension limit value, and the difference is greater than the preset difference value, the mesh cell size is increased; The extension scale of the connection structure is calculated based on the adjusted grid cell size, and the adjusted extension scale of the connection structure is obtained. The adjusted extension scale of the connection structure and the adjusted side length of the mesh unit are input into the floating structure simulation model for simulation until the simulation results meet the preset safety conditions. S6. The mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions are used as the final floating structure design parameters.

2. The adaptive sea surface wave floating structure design method according to claim 1, characterized in that, In step S3, the extension scale of the connection structure is calculated based on the grid cell size and the maximum wave steepness parameter, including: Multiplying the side length of the grid cell by the maximum steepness parameter yields the extension scale of the connection structure.

3. The adaptive sea surface wave floating structure design method according to claim 2, characterized in that, The side length of a grid cell refers to the length of the side of the grid cell that is parallel to the direction of the wave.

4. The adaptive sea surface wave floating structure design method according to claim 1, characterized in that, The preset safety conditions include: the maximum instantaneous tension value meets the safety threshold, and the adjacent grid cells take the maximum value of the grid cell size under the condition of no collision.

5. The adaptive sea surface wave floating structure design method according to claim 1, characterized in that, In step S2, the maximum wave steepness parameter is determined based on the wave conditions of the target sea area, including: Collect historical hydrological and meteorological data for the target sea area and extract wave-related parameters; Determine the wave steepness values ​​for different wave return periods based on wave-related parameters; The maximum wave steepness parameter was determined by combining the wave steepness values ​​under different wave return periods and the theoretical value of deep-water wave breaking limit.

6. The adaptive sea surface wave floating structure design method according to claim 1, characterized in that, In step S1, a grid-like floating structure is designed, and a connection structure is set between adjacent grid cells, including: An orthogonal connection mode is adopted, and each grid cell is connected to its adjacent grid cells in the four directions of front, back, left and right through a loop connection structure by connecting corner to corner.

7. The adaptive sea surface wave floating structure design method according to claim 6, characterized in that, The shackle connection structure uses flexible soft buckles or closed rope loops made of high-modulus polyethylene or aramid fiber.

8. A floating structure design system that adapts to sea surface fluctuations, characterized in that, The system is used to execute the adaptive sea surface wave floating structure design method according to any one of claims 1-7, the system comprising: The floating structure setting module is used to design a grid-like floating structure and set up connection structures between adjacent grid cells; The maximum wave steepness parameter determination module is used to determine the maximum wave steepness parameter based on the wave conditions of the target sea area. The extension scale calculation module is used to calculate the extension scale of the connecting structure based on the grid cell size and the maximum wave steepness parameter, so that the ratio of the extension scale of the connecting structure to the grid cell size satisfies the theoretical value of the deep-water wave breaking limit. The model building module is used to construct a simulation model of the floating structure based on the designed mesh cells, connection structure, and wave conditions of the target sea area. The simulation module is used to simulate floating structures under different wave conditions in the simulation model, obtain simulation results, and adjust the grid cell size according to the simulation results until the simulation results meet the preset safety conditions; in particular, after adjusting the grid cell size according to the simulation results, the extension scale of the connection structure is recalculated based on the adjusted grid cell size. The final parameter determination module is used to take the mesh cell size and connection structure extension scale corresponding to the simulation results that meet the preset safety conditions as the final floating structure design parameters.

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