Simulation method and device for wave phenomenon on deck of offshore photovoltaic platform

Abstract

The present application relates to offshore photovoltaic power generation technology field, especially to a kind of offshore photovoltaic platform deck wave phenomenon simulation method and device.The present application obtains the geometric parameter of offshore photovoltaic platform, determines the three-dimensional model of offshore photovoltaic platform based on geometric parameter, carries out computational domain extraction to three-dimensional model and carries out mesh division, obtains the three-dimensional model of offshore photovoltaic platform after mesh division, determines offshore photovoltaic platform deck wave phenomenon based on the three-dimensional model of offshore photovoltaic platform after mesh division and simulation equation, wherein simulation equation includes force field simulation equation, flow field simulation equation, six degrees of freedom motion simulation equation of floating body, mooring force simulation equation, and flow field simulation equation is processed by source term wave suppression.The present application can quickly and accurately simulate offshore photovoltaic platform deck wave phenomenon by the above configuration mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the offshore photovoltaic power generation technical field, and particularly relates to a simulation method and device for deck wave phenomenon of an offshore photovoltaic platform. BACKGROUND

[0002] In actual engineering, the deck of the offshore photovoltaic platform is prone to wave phenomenon, and once the photovoltaic components above the deck are splashed by seawater, salt deposits will be generated after the seawater evaporates. The salt deposits have a local shading effect on the photovoltaic components, which may affect the power generation efficiency of the photovoltaic components, or even cause the photovoltaic components to overheat and be damaged. Therefore, compared with the traditional offshore structure, the deck wave phenomenon needs to be considered additionally.

[0003] In the prior art, the potential flow method is a convenient and fast numerical simulation method, which can quickly simulate the action of waves on a floating structure and calculate the motion response, such as displacement, mooring force and other design parameters. However, this method assumes that the fluid is inviscid and irrotational, and needs to artificially add a damping term, so it cannot calculate the deck wave impact phenomenon.

[0004] Therefore, the present application provides a simulation method and device for deck wave phenomenon of an offshore photovoltaic platform to solve the problem of how to quickly and accurately simulate the deck wave phenomenon of the offshore photovoltaic platform. SUMMARY

[0005] To solve the problem of how to quickly and accurately simulate the deck wave phenomenon of the offshore photovoltaic platform, the present application provides a simulation method and device for deck wave phenomenon of an offshore photovoltaic platform.

[0006] In a first aspect, the present application provides a simulation method for deck wave phenomenon of an offshore photovoltaic platform, which comprises the following steps.

[0007] Obtaining the geometric parameters of the offshore photovoltaic platform;

[0008] Determining a three-dimensional model of the offshore photovoltaic platform based on the geometric parameters;

[0009] Extracting the calculation domain of the three-dimensional model and performing mesh division to obtain a three-dimensional model of the offshore photovoltaic platform after mesh division;

[0010] Determining the deck wave phenomenon of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after mesh division and a simulation equation;

[0011] The simulation equation comprises a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of a floating body, and a mooring force simulation equation, and in the process of determining the deck wave phenomenon of the offshore photovoltaic platform, the flow field simulation equation is processed by a source term wave suppression.

[0012] According to a second aspect, the present application provides a simulation device for wave on deck phenomenon of offshore photovoltaic platform, comprising:

[0013] an acquisition module configured to acquire geometric parameters of the offshore photovoltaic platform;

[0014] a first data processing module configured to determine a three-dimensional model of the offshore photovoltaic platform based on the geometric parameters;

[0015] a second data processing module configured to perform computational domain extraction and meshing on the three-dimensional model to obtain a meshed three-dimensional model of the offshore photovoltaic platform;

[0016] a third data processing module configured to determine the wave on deck phenomenon of the offshore photovoltaic platform based on the meshed three-dimensional model of the offshore photovoltaic platform and a simulation equation;

[0017] wherein the simulation equation comprises a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of a floating body, and a mooring force simulation equation, and in the process of determining the wave on deck phenomenon of the offshore photovoltaic platform, the flow field simulation equation is subjected to source term wave suppression processing.

[0018] In a third aspect, an electronic device is provided, which includes a memory and a processor, and the memory stores a computer program, and the processor executes the computer program to implement the method according to any of the embodiments of the present application.

[0019] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and when the computer program is executed in a computer, the computer is caused to perform the method according to any of the embodiments of the present application.

[0020] The embodiment of the present application provides a simulation method and device for the deck wave phenomenon of a marine photovoltaic platform. First, the geometric parameters of the marine photovoltaic platform are acquired, and a three-dimensional model of the marine photovoltaic platform is constructed according to the detailed parameters. After the three-dimensional model is constructed, the calculation domain of the model is extracted, and then mesh division is performed, so that the three-dimensional model of the marine photovoltaic platform after mesh division is obtained. Subsequently, numerical simulation is carried out on the three-dimensional model after mesh division based on simulation equations, so as to determine the deck wave phenomenon of the marine photovoltaic platform. The simulation equations include force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations of the floating body, and mooring force simulation equations. The use of multi-dimensional simulation equations makes the simulation of the deck wave phenomenon of the marine photovoltaic platform more comprehensive and detailed, and can accurately capture various complex physical phenomena. In addition, the source term wave suppression processing is performed in the flow field simulation equation. This not only effectively reduces the demand for the amount of grid for the numerical wave simulation of the photovoltaic platform, avoids the time and resource consumption caused by a large number of grid calculations, but also significantly improves the simulation efficiency, so that the entire simulation process is more efficient and fast. In summary, the method proposed in the present application can quickly and accurately simulate the deck wave phenomenon of the marine photovoltaic platform. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a simulation method flowchart for the deck wave phenomenon of a marine photovoltaic platform provided by the embodiment of the present application.

[0023] Figure 2 It is a hardware architecture diagram of an electronic device provided by the embodiment of the present application.

[0024] Figure 3 It is a simulation device structure diagram for the deck wave phenomenon of a marine photovoltaic platform provided by the embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0026] Reference is made to Figure 1 The embodiment of the present application provides a simulation method for the sea surface wave phenomenon on the deck of a sea photovoltaic platform, and the method comprises the following steps:

[0027] Step 100: Obtain the geometric parameters of the sea photovoltaic platform.

[0028] Step 102: Determine the three-dimensional model of the sea photovoltaic platform based on the geometric parameters.

[0029] Step 104: Extract the calculation domain of the three-dimensional model and perform mesh division to obtain the three-dimensional model of the sea photovoltaic platform after mesh division.

[0030] Step 106: Determine the sea surface wave phenomenon on the deck of the sea photovoltaic platform based on the three-dimensional model of the sea photovoltaic platform after mesh division and simulation equations, wherein the simulation equations comprise force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations of a floating body, and mooring force simulation equations, and in the process of determining the sea surface wave phenomenon on the deck of the sea photovoltaic platform, the flow field simulation equations are subjected to source term wave elimination processing.

[0031] In the embodiment, first, the geometric parameters of the sea photovoltaic platform are obtained, and according to these detailed parameters, the three-dimensional model of the sea photovoltaic platform is constructed. After the three-dimensional model is constructed, the calculation domain of the model is extracted, and then mesh division is performed, so as to obtain the three-dimensional model of the sea photovoltaic platform after mesh division. Subsequently, based on the simulation equations, numerical simulation is carried out on the three-dimensional model after mesh division, so as to determine the sea surface wave phenomenon on the deck of the sea photovoltaic platform. The simulation equations herein comprise force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations of a floating body, and mooring force simulation equations. The use of multi-dimensional simulation equations makes the simulation of the sea surface wave phenomenon on the deck of the sea photovoltaic platform more comprehensive and detailed, and various complex physical phenomena can be accurately captured. In addition, the flow field simulation equations are subjected to source term wave elimination processing. This not only effectively reduces the demand for the amount of grid for the numerical wave simulation of the photovoltaic platform, avoids the time and resource consumption caused by a large amount of grid calculation, but also significantly improves the simulation efficiency, so that the entire simulation process is more efficient and fast. In summary, the method proposed by the present application can quickly and accurately simulate the sea surface wave phenomenon on the deck of the sea photovoltaic platform, and provides strong data support and technical support for the design optimization, safety evaluation and performance improvement of the sea photovoltaic platform, and helps the stable development of the sea photovoltaic industry.

[0032] In the embodiment, the calculation domain extraction aims to determine the specific area for subsequent meshing and numerical simulation. The selection of the area is directly related to the accuracy and efficiency of the simulation of the deck wave phenomenon of the offshore photovoltaic platform. A suitable calculation domain can cover the key physical processes and areas related to the deck wave phenomenon, and will not increase the calculation burden due to the inclusion of too many irrelevant areas. Based on the three-dimensional model of the offshore photovoltaic platform, the area around the platform itself and the area within a certain range around the platform are taken as the calculation domain. For example, considering the range of sea wave action, the sea area within a certain radius around the platform and the space within a certain height (i.e. the height that the sea wave may reach) above the platform are taken as the calculation domain, so as to ensure that the whole process of the sea wave impacting the platform and the deck wave can be captured.

[0033] In an embodiment of the present application, the flow field simulation equation is constructed by the following formula:

[0034]

[0035] ρ = aρ1 + (1-a)ρ2

[0036] μ = αμ1 + (1-α)μ2

[0037] In the formula, ρ1 is the density of water, ρ2 is the density of air, μ1 is the viscosity of water, μ2 is the viscosity of air, U is the dynamic viscosity of water, U r is the dynamic viscosity of air, and α is the volume fraction of water in the calculation domain.

[0038] In the embodiment, the flow field simulation equation can depict the free surface formed by the interaction and coupling of two or more mutually insoluble fluids. Based on this, the flow field borne by the offshore photovoltaic platform can be simulated very accurately, effectively improving the accuracy and reliability of the simulation results, and providing data support and theoretical basis for in-depth research on the performance of the offshore photovoltaic platform in complex flow field environment.

[0039] In an embodiment of the present application, the six-degree-of-freedom motion simulation equation of the floating body is constructed by the following formula:

[0040]

[0041] In the formula, v f is the velocity component of the floating body along the x, y and z directions, ω f is the angular velocity component of the floating body rotating around the x, y and z axes, F mooring is the mooring force, F f is the total external force acting on the floating body, f c is the connecting force between the multiple floating bodies, M f is the sum of the moments generated by the forces, and dS is the force area of the structure, and m fMtot f I CS F CM T CG G CF t

[0042] In this embodiment, the six degrees of freedom motion simulation equation of the floating body describes the dynamic behavior of a number of interconnected rigid bodies, coupled together using different types of constraints, which can translate and rotate with respect to each other. The constraint equation of the connection of the rigid bodies can be described as follows.

[0043] The constraint equation of the connection of the floating bodies:

[0044] φ(q,t)=0

[0045] Ja=Q

[0046] where J is the Jacobian matrix of φ, a is the acceleration of the floating body, and Q is the different quality.

[0047] In order to enforce the acceleration condition of the constraint, it is necessary to add a constraint force to the system. By introducing the Lagrange multiplier λ of all constraints,

[0048] f c =J T ×λ

[0049] The vector λ needs to be found so that when the constraint force f c is combined with any external force F f (such as gravity, wave force, etc.), it can generate a constraint that satisfies

[0050] Therefore, the multi-body motion equation can also be written as

[0051] Ma=J T λ+F f

[0052] Assuming Aλ=b, and multiplying the equation on the left by the Jacobian matrix J

[0053] A=JM -1 J T

[0054] b=-JM -1 F f +Q

[0055] Substituting A and b can obtain λ, and in the case of known λ, the equation is integrated twice, that is, the generalized coordinate vector can be obtained.

[0056] In one embodiment of the present application, the mooring force simulation equation is constructed by the following formula:

[0057]

[0058] In the formula, x is the horizontal distance between the fairlead and the anchor point, h is the vertical distance between the fairlead and the anchor point, T H is the horizontal component of the anchor rope tension, and T V is the vertical component of the anchor rope tension, φw is the included angle formed by the mooring tension, T h is the direction vector, W is the constant weight in water corresponding to the unit mooring line length, EA is the mooring chain elastic stiffness, l s is the length of the mooring line.

[0059] In one embodiment of the present application, the force field simulation equation is constructed by the following formula:

[0060] F = 0.5ρg 2 H 2 T 2 / 2π

[0061] In the formula, H is the wave height in the wave parameter, T is the period, ρ is the seawater density, g is the gravitational acceleration, and F is the wave force.

[0062] In the present embodiment, the wave height, the period, the seawater density, and the gravitational acceleration in the wave parameter can be self-defined by the person skilled in the art according to the actual use.

[0063] In one embodiment of the present application, the flow field simulation equation is subjected to source term damping by the following equation:

[0064] q φ = -γρ (φ - φ * )

[0065] In the formula, γ is the fluid force coefficient, ρ is the fluid density, φ is the current solution of the flow field simulation equation, and φ* is the value approached by the flow field simulation equation.

[0066] In the present embodiment, regarding the numerical wave making method, considering the numerical solution efficiency, the source term damping method is adopted, which can select a shorter calculation domain to realize numerical wave making, unlike the damping damping method. In the calculation domain, the inlet boundary, the outlet boundary, and the two side boundaries are all set as velocity inlet boundaries, and force damping regions are set at the boundaries, and the region length is 1.5 times the incident wavelength (the optimal width of the damping region depends on the model geometric parameters). The top of the calculation domain is set as a pressure outlet edge, the floating array photovoltaic platform is set as a no-slip wall boundary (determined by the structural geometric characteristics), and the bottom of the calculation domain is set as a no-slip wall boundary.

[0067] In this embodiment, for the solution of the simulation equation, the finite volume method (FVM) of unstructured grid is used to numerically grid the partial differential equation, which can describe the characteristics of the calculation domain and also can transfer and calculate the variables. At the same time, considering the fluid dynamics problem of large amplitude motion of the floating photovoltaic platform, the present application divides the calculation domain into multiple sub-grids by using the overlapping grid method, which can be independently formed and moved, and then combined by interpolation and information transfer at the required place, so as to simulate the motion information of the floating platform. In order to ensure the accuracy of numerical solution, the grid encryption processing of the calculation domain is also needed. Considering the numerical wave making accuracy requirement, generally, 80-100 grids should be divided along the wave direction of the wave propagation, and at least 20 grids should be divided along the wave height direction. In addition, in order to facilitate the transition of the overlapping grid in the process of solving the floating body motion, a transition area is generally divided around the overlapping grid, and the grid amount of the transition area and the overlapping grid area should be consistent as much as possible. In order to ensure the stability and convergence of the calculation, the convergence condition of the numerical simulation should also be defined. The convergence condition of the numerical simulation should be set according to the Courant number (CFL), and the Courant number should be controlled below 1. The Courant number can be defined as follows:

[0068]

[0069] Wherein, U Max is the maximum fluid velocity, Δx Min is the minimum structured grid size, and Δt is the calculation time step.

[0070] In an embodiment of the present application, based on the three-dimensional model of the offshore photovoltaic platform after grid division and the simulation equation, the wave phenomenon on the deck of the offshore photovoltaic platform is determined, including:

[0071] According to the simulation equation, the numerical simulation is carried out on each node of the three-dimensional model of the offshore photovoltaic platform after grid division, and the wave phenomenon of each node is determined;

[0072] The wave phenomenon on the deck of the offshore photovoltaic platform is determined through the wave phenomenon of each node.

[0073] In this embodiment, first, according to the simulation equation, the numerical simulation operation is carried out on each node of the three-dimensional model of the offshore photovoltaic platform after grid division, so as to determine the wave phenomenon at each node. This step can accurately capture the changes on the microscopic level of the model and obtain detailed data of each node. Then, through the summary and analysis of the wave phenomenon of each node, the wave phenomenon on the deck of the offshore photovoltaic platform is determined from the micro to the macro. This analysis method from the local to the whole can comprehensively and accurately reflect the wave condition of the deck of the offshore photovoltaic platform under complex working conditions, and provide detailed and reliable data support for subsequent research and evaluation.

[0074] As Figure 2 , Figure 3 indicated, the embodiment of the present application provides a simulation measurement device for the wave phenomenon on the deck of the offshore photovoltaic platform. The device embodiment can be realized by software, or realized by hardware or the combination of software and hardware. From the hardware layer, as Figure 2 indicated, it is a hardware architecture diagram of the electronic device where the simulation measurement device for the wave phenomenon on the deck of the offshore photovoltaic platform provided by the embodiment of the present application is located. In addition to the processor, the memory, the network interface, and the non-volatile memory as Figure 2 indicated, the electronic device where the device in the embodiment is usually also can include other hardware, such as the forwarding chip responsible for processing the message and the like. Taking the software realization as an example, as Figure 3 indicated, as a logically meaningful device, it is formed by the CPU of the electronic device where it is located to read the corresponding computer program in the non-volatile memory to the memory for running.

[0075] As Figure 3 indicated, the embodiment provides a simulation measurement device for the wave phenomenon on the deck of the offshore photovoltaic platform, and the device comprises:

[0076] The acquisition module 300 is configured to acquire the geometric parameters of the offshore photovoltaic platform.

[0077] The first data processing module 302 is configured to determine the three-dimensional model of the offshore photovoltaic platform based on the geometric parameters.

[0078] The second data processing module 304 is configured to extract the calculation domain and perform the mesh division on the three-dimensional model to obtain the three-dimensional model of the offshore photovoltaic platform after the mesh division.

[0079] The third data processing module 306 is configured to determine the wave phenomenon on the deck of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after the mesh division and the simulation equation.

[0080] The simulation equation comprises the force field simulation equation, the flow field simulation equation, the six-degree-of-freedom motion simulation equation of the floating body, and the mooring force simulation equation, and in the process of determining the wave phenomenon on the deck of the offshore photovoltaic platform, the flow field simulation equation is subjected to the source term wave suppression processing.

[0081] In an embodiment of the present application, the flow field simulation equation is constructed by the following formula:

[0082]

[0083] ρ=aρ1+(1-a)ρ2

[0084] μ=αμ1+(1-α)μ2

[0085] wherein p1 is the density of water, p2 is the density of air, m1 is the viscosity of water, m2 is the viscosity of air, U is the dynamic viscosity of water, U r is the dynamic viscosity of air, and a is the volume fraction of water in the calculation domain.

[0086] In one embodiment of the present application, the six-degree-of-freedom motion simulation equation of the floating body is constructed by the following formula:

[0087]

[0088]

[0089] wherein v f is the velocity component of the floating body along the x, y, and z directions, w f is the angular velocity component of the floating body rotating around the x, y, and z axes, F mooring is the mooring force, F f is the resultant external force on the floating body, f c is the connecting force between the multiple floating bodies, M f is the sum of the moments generated by the respective forces, dS is the force-receiving area of the structure, m f is the total mass of the platform, I f is the moment of inertia of the structure, r CS is the fluid force, r CM is the mooring force, r CG is the gravity, r CF is the force arm length of the multi-body connecting force from the center of mass, and t is time.

[0090] In one embodiment of the present application, the mooring force simulation equation is constructed by the following formula:

[0091]

[0092] wherein x is the horizontal distance between the fairlead and the anchor point, h is the vertical distance between the fairlead and the anchor point, T H is the horizontal component of the anchor rope tension, and T V is the vertical component of the anchor rope tension, w is the included angle formed by the mooring tension, T h is the direction vector, W is the weight in water corresponding to a unit length of the mooring line, EA is the elastic stiffness of the mooring chain, and l s is the length of the mooring line.

[0093] In one embodiment of the present application, the force field simulation equation is constructed by the following formula:

[0094] F = 0.5 p g 2 H 2 T2 / 2π

[0095] In the formula, H is the wave height in the wave parameter, T is the period, p is the density of seawater, g is the acceleration of gravity, and F is the wave force.

[0096] In an embodiment of the present application, the source term elimination of the flow field simulation equation is performed by the following equation:

[0097] q φ = -γρ(φ-φ * )

[0098] In the formula, y is the fluid force coefficient, p is the fluid density, φ is the current solution of the flow field simulation equation, and φ* is the value approached by the flow field simulation equation.

[0099] In an embodiment of the present application, the third data processing module is configured to perform the following operations:

[0100] numerically simulate each node on the three-dimensional model of the grid-divided offshore photovoltaic platform according to the simulation equation, and determine the wave-riding phenomenon of each node;

[0101] determine the wave-riding phenomenon on the deck of the offshore photovoltaic platform through the wave-riding phenomenon of each node.

[0102] It can be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the simulation and measurement device for the wave-riding phenomenon on the deck of the offshore photovoltaic platform. In other embodiments of the present application, the simulation and measurement device for the wave-riding phenomenon on the deck of the offshore photovoltaic platform can include more or fewer components than the illustration, or combine certain components, or split certain components, or different component arrangements. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0103] The information interaction, execution process, and other contents between the modules in the device are based on the same concept as the method embodiments of the present application, and the specific contents can be referred to the description in the method embodiments of the present application, which will not be described here.

[0104] The embodiments of the present application also provide an electronic device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the simulation method for the wave-riding phenomenon on the deck of the offshore photovoltaic platform in any embodiment of the present application when executing the computer program.

[0105] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program makes the processor execute the simulation method for the wave-riding phenomenon on the deck of the offshore photovoltaic platform in any embodiment of the present application when being executed by the processor.

[0106] Specifically, a system or apparatus equipped with a storage medium on which a software program code for implementing the functions of any of the above-described embodiments is stored, and a computer (or CPU or MPU) of the system or apparatus is caused to read out and execute the program code stored in the storage medium.

[0107] In this case, the program code read out from the storage medium can itself implement the functions of any of the above-described embodiments, and therefore the program code and the storage medium which stores the program code constitute a part of the present application.

[0108] Embodiments of the storage medium for supplying the program code include a floppy disk, a hard disk, an optical disk such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0109] Further, it should be understood by those skilled in the art that not only the program code read out by the computer, but also the operating system or the like operating on the computer based on the instructions of the program code can perform part or all of the actual operations to realize the functions of any of the above-described embodiments.

[0110] Further, it should be understood that the program code read out from the storage medium is written into a memory provided in an expansion board inserted into the computer or a memory provided in an expansion module connected to the computer, and then part or all of the actual operations are performed by a CPU or the like mounted on the expansion board or the expansion module based on the instructions of the program code to realize the functions of any of the above-described embodiments.

[0111] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0112] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the foregoing program can be stored in a computer readable storage medium, and the program executes the steps of the above-mentioned method embodiments when executed; and the foregoing storage medium includes various storage media that can store program codes, such as ROM, RAM, magnetic disk or optical disk.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for simulating wave phenomena on the deck of an offshore photovoltaic platform, characterized in that, The method includes: Obtain the geometric parameters of the offshore photovoltaic platform; Based on the aforementioned geometric parameters, a three-dimensional model of the offshore photovoltaic platform is determined; The computational domain of the three-dimensional model is extracted and meshed to obtain a three-dimensional model of the offshore photovoltaic platform after meshing. Based on the three-dimensional model and simulation equations of the offshore photovoltaic platform after the grid division, the wave phenomenon on the deck of the offshore photovoltaic platform is determined. The simulation equations include force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations for the floating body, and mooring force simulation equations. In the process of determining the wave phenomenon on the deck of the offshore photovoltaic platform, the flow field simulation equations are processed by source term wave suppression. The flow field simulation equations are constructed using the following formula: ρ=aρ1+(1-a)ρ2 μ=αμ1+(1-α)μ2 In the formula, ρ1 is the density of water, ρ2 is the density of air, μ1 is the viscosity of water, μ2 is the viscosity of air, U is the dynamic viscosity of water, and U r Let be the dynamic viscosity of air, and α be the volume fraction of water in the computational domain; The six-degree-of-freedom motion simulation equations for the floating body are constructed using the following formula: In the formula, v f Let ω be the velocity components of the floating body along the x, y, z directions. f F represents the angular velocity components of the floating body rotating about the x, y, and z axes. mooring For mooring force, F f For the floating body to be subjected to the net external force, f c M is the connecting force between multiple floating bodies. f The sum of the moments generated by the various forces, dS is the area of ​​the structure subjected to the forces, m f For the overall platform quality, I f Let r be the rotational inertia of the structure. CS For fluid force, r CM For mooring force, r CG For gravity, r CF t represents the lever arm length of the multibody connection force from the center of mass, and t represents time. The six-degree-of-freedom motion simulation equations of the floating bodies describe the dynamic behavior of multiple interconnected floating bodies, coupled together using different types of constraints to translate and rotate relative to each other. The constraint equations for the multi-floating body connectors are as follows: φ(q,t)=0 Ja=Q In the formula, J is the Jacobian matrix of φ, a is the acceleration of the floating body, and Q represents heterogeneity; To enforce the acceleration conditions, constraint forces need to be added to the system, which is achieved by introducing the Lagrange multiplier λ of all constraints. f c =J T ×λ We need to find the vector λ so that we can combine the constraint forces f. c With any external force F f In all cases, it can generate results that satisfy the constraints; Therefore, the equations of motion for a multi-buoy body can be written as follows: Ma=J T λ+F f Assuming Aλ = b, and multiplying the equations of motion of the multi-buoyant body by the Jacobian matrix J on the left, we get... A=JM -1 J T b=-JM -1 F f +Q Substituting A and b, we can find λ. Given λ, we can then apply the equation... By performing two integrations, the generalized coordinate vector can be obtained; The mooring force simulation equations are constructed using the following formula: In the formula, x is the horizontal distance between the cable guide hole and the anchor point, h is the vertical distance between the cable guide hole and the anchor point, and T is the vertical distance between the cable guide hole and the anchor point. H The horizontal component of the anchor rope tension and T V Let φ be the vertical component of the anchor rope tension, φw be the angle formed by the mooring tension, W be the constant weight per unit length of mooring line in water, EA be the elastic stiffness of the mooring chain, and l be the vertical component of the anchor rope tension. s This refers to the length of the mooring line; The force field simulation equations are constructed using the following formula: F=0.5ρ3g 2 H 2 T 2 / 2π In the formula, H is the wave height, T is the period, ρ3 is the seawater density, g is the gravitational acceleration, and F is the wave force. The flow field simulation equations are processed by source term mitigation using the following equations: q φ =-gr4(φ-φ * ) In the formula, γ is the fluid dynamic coefficient, ρ4 is the fluid density, φ is the current solution of the flow field simulation equation, and φ* is the value that the flow field simulation equation approaches.

2. The method according to claim 1, characterized in that, Based on the three-dimensional model and simulation equations of the offshore photovoltaic platform after mesh division, the wave phenomenon on the deck of the offshore photovoltaic platform is determined, including: Numerical simulations are performed on each node of the three-dimensional model of the offshore photovoltaic platform after the grid division based on the simulation equations to determine the wave phenomenon of each node. By observing the wave-climbing phenomenon at each node, the wave-climbing phenomenon on the deck of the offshore photovoltaic platform can be determined.

3. A device for simulating wave phenomena on the deck of an offshore photovoltaic platform, characterized in that, For performing the method according to any one of claims 1-2, comprising: The acquisition module is used to acquire the geometric parameters of the offshore photovoltaic platform; The first data processing module is used to determine the three-dimensional model of the offshore photovoltaic platform based on the geometric parameters. The second data processing module is used to extract the computational domain from the three-dimensional model and perform mesh division to obtain a three-dimensional model of the offshore photovoltaic platform after mesh division. The third data processing module is used to determine the wave phenomenon on the deck of the offshore photovoltaic platform based on the three-dimensional model and simulation equations of the offshore photovoltaic platform after grid division. The simulation equations include force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations for the floating body, and mooring force simulation equations. In the process of determining the wave phenomenon on the deck of the offshore photovoltaic platform, the flow field simulation equations are processed by source term wave suppression.

4. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method as described in any one of claims 1-2.

5. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed in a computer, causes the computer to perform the method described in any one of claims 1-2.

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