Simulation method and device for sea photovoltaic platform deck wave rising phenomenon

Abstract

The invention relates to the technical field of offshore photovoltaic power generation, in particular to a method and a device for simulating a deck wave rising phenomenon of an offshore photovoltaic platform. The method comprises the following steps: acquiring geometric parameters of an offshore photovoltaic platform, determining a three-dimensional model of the offshore photovoltaic platform based on the geometric parameters, carrying out computational domain extraction on the three-dimensional model and carrying out grid division to obtain the three-dimensional model of the offshore photovoltaic platform after grid division, and calculating the three-dimensional model of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after grid division and a simulation equation. 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 the flow field simulation equation is subjected to source item wave absorption processing. Through the above configuration mode, the device can rapidly and accurately simulate the sea photovoltaic platform deck wave rising phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and particularly relates to a method and device for simulating the overtopping phenomenon on the deck of an offshore photovoltaic platform. Background Art

[0002] In actual engineering, the deck of an offshore photovoltaic platform is prone to overtopping under the action of waves. Once the photovoltaic modules located above the deck are contaminated with seawater, salt stains will be generated after the seawater evaporates. Such salt stains will cause local shading effects on the photovoltaic modules, which will, in the lightest case, affect the power generation efficiency of the photovoltaic modules, and in the severest case, cause serious heating of the photovoltaic modules and thus damage them. Therefore, compared with traditional marine structures, this overtopping phenomenon on the deck 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 its motion responses, such as design parameters like displacement and mooring force. However, this method assumes that the fluid is inviscid and irrotational and requires artificial addition of damping terms, so it cannot calculate the overtopping impact phenomenon on the deck.

[0004] Based on this, the present invention proposes a method and device for simulating the overtopping phenomenon on the deck of an offshore photovoltaic platform to solve the problem of how to quickly and accurately simulate the overtopping phenomenon on the deck of an offshore photovoltaic platform. Summary of the Invention

[0005] In order to solve the problem of how to quickly and accurately simulate the overtopping phenomenon on the deck of an offshore photovoltaic platform, an embodiment of the present invention provides a method and device for simulating the overtopping phenomenon on the deck of an offshore photovoltaic platform.

[0006] In a first aspect, an embodiment of the present invention provides a method for simulating the overtopping phenomenon on the deck of an offshore photovoltaic platform, and the method includes:

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

[0008] Based on the geometric parameters, determine the three-dimensional model of the offshore photovoltaic platform;

[0009] Extract the computational domain of the three-dimensional model and perform mesh division to obtain the three-dimensional model of the offshore photovoltaic platform after mesh division;

[0010] Based on the three-dimensional model of the offshore photovoltaic platform after mesh division and the simulation equations, determine the overtopping phenomenon on the deck of the offshore photovoltaic platform;

[0011] Wherein, the simulation equations include 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 overtopping phenomenon on the deck of the offshore photovoltaic platform, the flow field simulation equation is processed by source term wave absorption.

[0012] According to a second aspect, the present invention provides a simulation device for the phenomenon of waves hitting the deck of an offshore photovoltaic platform, comprising:

[0013] An acquisition module, configured to acquire the 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 extract a 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;

[0016] A third data processing module, configured to determine the phenomenon of waves hitting the deck of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after mesh division and a simulation equation;

[0017] Wherein, the simulation equation includes 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 phenomenon of waves hitting the deck of the offshore photovoltaic platform, the flow field simulation equation is subjected to source term wave absorption treatment.

[0018] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the method described in any embodiment of the present invention is implemented.

[0019] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed in a computer, the computer is made to execute the method described in any embodiment of the present invention.

[0020] An embodiment of the present invention provides a method and device for simulating the phenomenon of waves hitting the deck of an offshore photovoltaic platform. First, geometric parameters of the offshore photovoltaic platform are obtained, and based on these detailed parameters, a three-dimensional model of the offshore photovoltaic platform is constructed. After the construction of the three-dimensional model is completed, the computational domain of the model is extracted, and then mesh generation is carried out, so as to obtain the three-dimensional model of the offshore photovoltaic platform after mesh generation. Subsequently, based on the simulation equations, numerical simulation is carried out on the three-dimensional model after mesh generation to determine the phenomenon of waves hitting the deck of the offshore photovoltaic platform. The simulation equations here include a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of the floating body, and a mooring force simulation equation. The application of multi-dimensional simulation equations makes the simulation of the phenomenon of waves hitting the deck of the offshore photovoltaic platform more comprehensive and detailed, and can accurately capture various complex physical phenomena. In addition, source term wave dissipation treatment is carried out in the flow field simulation equation. This not only effectively reduces the requirement for the number of meshes in the numerical wave generation simulation of the photovoltaic platform, avoids the time and resource consumption caused by a large number of mesh calculations, but also significantly improves the simulation efficiency, making the entire simulation process more efficient and fast. In summary, the method proposed by the present invention can quickly and accurately simulate the phenomenon of waves hitting the deck of the offshore photovoltaic platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a flowchart of a method for simulating the phenomenon of waves hitting the deck of an offshore photovoltaic platform provided by an embodiment of the present invention;

[0023] Figure 2 is a hardware architecture diagram of an electronic device provided by an embodiment of the present invention;

[0024] Figure 3 is a structural diagram of a device for simulating the phenomenon of waves hitting the deck of an offshore photovoltaic platform provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0026] Please refer to Figure 1 , an embodiment of the present invention provides a method for simulating the wave slamming phenomenon on the deck of an offshore photovoltaic platform, and the method includes:

[0027] Step 100: Obtain the geometric parameters of the offshore photovoltaic platform;

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

[0029] Step 104: Extract the computational domain of the three-dimensional model and perform mesh division to obtain the three-dimensional model of the offshore photovoltaic platform after mesh division;

[0030] Step 106: Determine the wave slamming phenomenon on the deck of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after mesh division and the simulation equations; wherein, the simulation equations include a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of the floating body, and a mooring force simulation equation, and in the process of determining the wave slamming phenomenon on the deck of the offshore photovoltaic platform, the source term wave dissipation treatment is performed on the flow field simulation equation.

[0031] In this embodiment, first, the geometric parameters of the offshore photovoltaic platform are obtained, and based on these detailed parameters, a three-dimensional model of the offshore photovoltaic platform is constructed. After the construction of the three-dimensional model is completed, the computational domain of the model is extracted, and then mesh division is carried out, so as to obtain the three-dimensional model of the offshore photovoltaic platform after mesh division. Subsequently, based on the simulation equations, numerical simulation is carried out on the three-dimensional model after mesh division to determine the wave slamming phenomenon on the deck of the offshore photovoltaic platform. The simulation equations here include a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of the floating body, and a mooring force simulation equation. The application of multi-dimensional simulation equations makes the simulation of the wave slamming phenomenon on the deck of the offshore photovoltaic platform more comprehensive and detailed, and can accurately capture various complex physical phenomena. In addition, the source term wave dissipation treatment is performed in the flow field simulation equation. This not only effectively reduces the requirement for the number of meshes in the numerical wave generation simulation of the photovoltaic platform, avoids the time and resource consumption caused by a large number of mesh calculations, but also significantly improves the simulation efficiency, making the entire simulation process more efficient and fast. In summary, the method proposed by the present invention can quickly and accurately simulate the wave slamming phenomenon on the deck of the offshore photovoltaic platform, provide strong data support and technical guarantee for the design optimization, safety assessment and performance improvement of the offshore photovoltaic platform, and contribute to the stable development of the offshore photovoltaic industry.

[0032] In this embodiment, the calculation domain extraction aims to determine the specific area for subsequent mesh generation and numerical simulation. The selection of this area is directly related to the accuracy and efficiency of simulating the wave impact on the deck of the offshore photovoltaic platform. A suitable calculation domain can not only cover the key physical processes and areas related to the wave impact on the deck but also avoid increasing the computational burden due to including too many irrelevant areas. Based on the three-dimensional model of the offshore photovoltaic platform, the area around the platform itself and within a certain range is used as the calculation domain. For example, considering the range of wave action, the sea area within a certain radius around the platform and the space at a certain height above the platform (i.e., the estimated height that the waves may reach) may be used as the calculation domain to ensure that the entire process of the waves hitting the platform and surging onto the deck can be captured.

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

[0034]

[0035] ρ = aρ 1 +(1 - a)ρ 2

[0036] μ = αμ 1 +(1 - α)μ 2

[0037] In the formula, ρ 1 is the density of water, ρ 2 is the density of air, μ 1 is the viscosity of water, μ 2 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 this embodiment, with the help of the flow field simulation equation, the free liquid surface formed by the interaction and coupling of two or more immiscible fluids can be characterized. Based on this, the flow field borne by the offshore photovoltaic platform can be simulated extremely accurately, effectively improving the accuracy and reliability of the simulation results, and providing data support and theoretical basis for in-depth study of the performance of the offshore photovoltaic platform in a complex flow field environment.

[0039] In one embodiment of the present invention, 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, z directions, ω f is the angular velocity component of the floating body rotating around the x, y, z axes, F mooring is the mooring force, Ff Let \(f\) be the resultant external force acting on the floating body. c Let \(M\) be the connecting force between multiple floating bodies. f Let \(dS\) be the structural stress area, and \(m\) be the sum of the moments generated by each acting force. f Let \(I\) be the total mass of the platform. f Let \(r\) be the moment of inertia of the structure. CS Let \(r\) be the hydrodynamic force. CM Let \(r\) be the mooring force. CG Let \(r\) be the gravitational force. CF Let \(t\) be the time, and \(r\) be the lever arm length of the multi-body connecting force from the centroid.

[0042] In this embodiment, the six-degree-of-freedom motion simulation equation of the floating body describes the dynamic behavior of multiple interconnected rigid bodies, which are coupled together using different types of constraints and can translate and rotate relative to each other. The constraint equation of the connecting members of the rigid bodies can be described as follows.

[0043] Constraint equation for multi-floating-body connecting members:

[0044] \(\varphi(q,t)=0\)

[0045] \(Ja = Q\)

[0046] where \(J\) is the Jacobian matrix of \(\varphi\), \(a\) is the acceleration of the floating body, and \(Q\) is the heterogeneity.

[0047] To enforce the acceleration conditions of the constraints, the constraint forces need to be added to the system. By introducing the Lagrange multiplier \(\lambda\) for all constraints, we get

[0048] \(f\) c \(=\) T \(J\)

[0049] We need to find the vector \(\lambda\) such that when the constraint force \(f\) c is combined with any external force \(F\) f (such as gravitational force, wave force, etc.), it can generate a solution that satisfies the constraints.

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

[0051] \(Ma = J\) T \(\lambda+F\) f

[0052] Assume \(A\lambda = b\), and multiply both sides of the equation on the left by the Jacobian matrix \(J\) to get

[0053] \(A = JM\) -1 \(J\) T

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

[0055] Substituting A and b, λ can be obtained. Given λ, integrating the equation twice will yield the generalized coordinate vector.

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

[0057]

[0058] where 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 line tension and T V is the vertical component of the anchor line tension, φw is the 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 elastic stiffness of the mooring chain, and l s is the length of the mooring line.

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

[0060] F = 0.5ρg 2 H 2 T 2 / 2π

[0061] where H is the wave height in the wave parameters, T is the period, ρ is the seawater density, g is the acceleration due to gravity, and F is the wave force.

[0062] In this embodiment, those skilled in the art can customize the wave height, period, seawater density, and acceleration due to gravity in the wave parameters according to the actual usage.

[0063] In an embodiment of the present invention, the source term wave dissipation treatment of the flow field simulation equation is performed by the following equation:

[0064] q φ = -γρ(φ - φ * )

[0065] where γ is the hydrodynamic coefficient, ρ is the fluid density, φ is the current solution of the flow field simulation equation, and φ* is the value approximated by the flow field simulation equation.

[0066] In this embodiment, regarding the numerical wave generation method, considering the numerical solution efficiency issue, the source term damping method is adopted. Different from the damping wave elimination method, this method can select a shorter computational domain to achieve numerical wave generation. In this computational domain, the inlet boundary, outlet boundary, and both side boundaries are all set as velocity inlet boundaries, and a force damping region is set at the boundaries. 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 computational domain is set as a pressure outlet boundary, and both the floating array photovoltaic platform and the bottom of the computational domain are set as no-slip wall boundaries (determined by the structural geometric characteristics).

[0067] In this embodiment, for the solution of the simulation equations, the finite volume method (FVM) with unstructured grids is used to discretize the numerical grids of the partial differential equations. Such numerical grids can describe the characteristics of the computational domain and can also perform variable transfer and calculation. At the same time, considering the hydrodynamic problems of the large-scale movement of the floating photovoltaic platform, the overlapping grid method is adopted in the present invention. By dividing the computational domain into multiple sub-grids, these sub-grids can be independently formed and moved, and then merged by interpolation and information transfer at the required places to simulate the motion information of the floating body platform. To ensure the accuracy of the numerical solution, grid refinement processing is also required for the computational domain. Considering the numerical wave generation accuracy requirements, generally, along the wave propagation direction, 1 wavelength needs to be divided into 80 - 100 grids, and at least 20 grids are required along the wave height direction. In addition, to facilitate the good transition of the overlapping grids during the solution of the floating body motion, a transition region generally needs to be divided around the overlapping grids, and the grid quantity in the transition region should be as consistent as possible with that in the overlapping grid region. To ensure the stability and convergence of the calculation, the convergence conditions of the numerical simulation also need to be defined. The convergence conditions 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] where U Max is the maximum fluid velocity, Δx Min is the minimum structural grid size, and Δt is the computational time step.

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

[0071] Performing numerical simulation on each node of the three-dimensional model of the offshore photovoltaic platform after grid division according to the simulation equations to determine the wave overtopping phenomenon of each node;

[0072] Determining the wave overtopping phenomenon on the deck of the offshore photovoltaic platform through the wave overtopping phenomenon of each node.

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

[0074] As Figure 2 , Figure 3 shown, the embodiment of the present invention provides a simulation measurement device for the overtopping phenomenon of the deck of an offshore photovoltaic platform. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. In terms of the hardware level, as Figure 2 shown, it is a hardware architecture diagram of an electronic device where the simulation measurement device for the overtopping phenomenon of the deck of an offshore photovoltaic platform provided by the embodiment of the present invention is located. In addition to Figure 2 the shown processor, memory, network interface, and non-volatile memory, the electronic device where the device is located in the embodiment usually may also include other hardware, such as a forwarding chip responsible for processing packets, etc. Taking software implementation as an example, as Figure 3 shown, as a logically meaningful device, it is formed by the CPU of its corresponding electronic device reading the computer program in the non-volatile memory into the memory and running.

[0075] As Figure 3 shown, a simulation measurement device for the overtopping phenomenon of the deck of an offshore photovoltaic platform provided in this embodiment, the device includes:

[0076] An acquisition module 300, configured to acquire the geometric parameters of the offshore photovoltaic platform;

[0077] A first data processing module 302, configured to determine a three-dimensional model of the offshore photovoltaic platform based on the geometric parameters;

[0078] A second data processing module 304, configured to extract a computational domain from the three-dimensional model and perform grid division to obtain a three-dimensional model of the offshore photovoltaic platform after grid division;

[0079] A third data processing module 306, configured to determine the overtopping phenomenon of the deck of the offshore photovoltaic platform based on the three-dimensional model of the offshore photovoltaic platform after grid division and the simulation equation;

[0080] Among them, the simulation equations include a force field simulation equation, a flow field simulation equation, a six-degree-of-freedom motion simulation equation of the floating body, and a mooring force simulation equation. During the process of determining the overtopping phenomenon on the deck of the offshore photovoltaic platform, the flow field simulation equation is processed by source term wave absorption.

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

[0082]

[0083] ρ = aρ 1 +(1 - a)ρ 2

[0084] μ = αμ 1 +(1 - α)μ 2

[0085] In the formula, ρ 1 is the density of water, ρ 2 is the density of air, μ 1 is the viscosity of water, μ 2 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 computational domain.

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

[0087]

[0088]

[0089] In the formula, v f is the velocity component of the floating body along the x, y, z directions, ω f is the angular velocity component of the floating body rotating around the x, y, z axes, F mooring is the mooring force, F f is the resultant external force acting on the floating body, f c is the connection force between multiple floating bodies, M f is the sum of the torques generated by each acting force, dS is the structural stress area, m f is the total mass of the platform, I f is the moment of inertia of the structure, r CS is the hydrodynamic force, r CM is the mooring force, r CG is the gravitational force, r CF is the lever arm length of the multi-body connection force from the centroid, and t is the time.

[0090] In an embodiment of the present invention, 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, and 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, and T h is the direction vector, W is the constant weight in water corresponding to the unit mooring line length, EA is the elastic stiffness of the mooring chain, and l s is the length of the mooring line.

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

[0094] F = 0.5ρg 2 H 2 T 2 / 2π

[0095] Wherein, H is the wave height in the wave parameters, T is the period, ρ is the seawater density, g is the acceleration due to gravity, and F is the wave force.

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

[0097] q φ = -γρ(φ - φ * )

[0098] Wherein, γ is the hydrodynamic coefficient, ρ is the fluid density, φ is the current solution of the flow field simulation equation, and φ* is the value approximated by the flow field simulation equation.

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

[0100] Perform numerical simulation on each node of the three-dimensional model of the offshore photovoltaic platform after grid division according to the simulation equation to determine the overtopping phenomenon of each node;

[0101] Determine the overtopping phenomenon on the deck of the offshore photovoltaic platform through the overtopping phenomenon of each node.

[0102] It can be understood that the structure illustrated in the embodiments of the present invention does not specifically limit a simulation measurement device for the overtopping phenomenon on the deck of an offshore photovoltaic platform. In other embodiments of the present invention, a simulation measurement device for the overtopping phenomenon on the deck of an offshore photovoltaic platform may include more or fewer components than those illustrated, or combine certain components, or split certain components, or have different component arrangements. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0103] Regarding the information interaction, execution process, etc. between the various modules within the above-mentioned device, since they are based on the same concept as the method embodiments of the present invention, the specific content can be referred to the description in the method embodiments of the present invention, and will not be elaborated here.

[0104] The embodiments of the present invention also provide an electronic device, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements a simulation method for the overtopping phenomenon on the deck of an offshore photovoltaic platform according to any embodiment of the present invention.

[0105] The embodiments of the present invention also provide a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the processor is caused to execute a simulation method for the overtopping phenomenon on the deck of an offshore photovoltaic platform according to any embodiment of the present invention.

[0106] Specifically, a system or device equipped with a storage medium can be provided. Software program codes for implementing the functions of any of the above embodiments are stored on the storage medium, and the computer (or CPU or MPU) of the system or device is caused to read and execute the program codes stored on the storage medium.

[0107] In this case, the program codes read from the storage medium itself can implement the functions of any one of the above embodiments. Therefore, the program codes and the storage medium storing the program codes constitute a part of the present invention.

[0108] Embodiments of the storage medium for providing program codes include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Optionally, the program codes can be downloaded from a server computer via a communication network.

[0109] Furthermore, it should be clear that not only can the actual operations be completed in part or in whole by executing the program codes read by the computer, but also by the operating system operating on the computer based on the instructions of the program codes, thereby implementing the functions of any one of the above embodiments.

[0110] In addition, it can be understood that the program code read from the storage medium is written into the memory provided in the expansion board inserted into the computer or into the memory provided in the expansion module connected to the computer. Subsequently, based on the instructions of the program code, the CPU or the like installed on the expansion board or the expansion module is made to execute part or all of the actual operations, thereby implementing the functions of any of the above embodiments.

[0111] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0112] Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above method embodiments; and the foregoing storage medium includes various media such as ROM, RAM, magnetic disk or optical disc that can store program code.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; 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 invention.

Claims

1. A method for simulating wave phenomena on the deck of an offshore photovoltaic platform, characterized in that: The method comprises: Obtain geometric parameters of offshore photovoltaic platforms; Based on the geometric parameters, determining a three-dimensional model of the offshore photovoltaic platform; Extracting the computational domain of the three-dimensional model and performing meshing to obtain a three-dimensional model of the offshore photovoltaic platform after meshing; Based on the three-dimensional model and simulation equation of the offshore photovoltaic platform after the grid division, determining the wave phenomenon on the deck of the offshore photovoltaic platform; Among them, the simulation equations include force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations of floating bodies, 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 elimination.

2. The method according to claim 1, characterized in that The flow field simulation equation is constructed by the following formula: ρ=aρ1+(1-a)ρ2 μ=αμ1+(1-α)μ2 Where 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 is the dynamic viscosity of water. r is the dynamic viscosity of air, and α is the volume fraction of water in the computational domain.

3. The method according to claim 2, characterized in that The six-degree-of-freedom motion simulation equation of the floating body is constructed by the following formula: 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 net external force on the floating body, f c is the connection force between multiple floating bodies, M f is the sum of the moments generated by each force, dS is the structural force area, 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 gravity, r CF is the length of the force arm of the multi-body connection force from the center of mass, and t is the time.

4. The method according to claim 3, characterized in that The mooring force simulation equation is constructed by the following formula: Where x is the horizontal distance between the fairlead hole and the anchor point, h is the vertical distance between the fairlead hole and the anchor point, and 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 angle formed by the mooring tension, T h is the direction vector, W is the constant weight in water corresponding to the unit length of mooring line, EA is the elastic stiffness of the mooring chain, l s is the length of the mooring line.

5. The method according to claim 1, characterized in that The force field simulation equation is constructed by the following formula: F=0.5ρg 2 H 2 T 2 / 2π Where H is the wave height among wave parameters, T is the period, ρ is the seawater density, g is the gravitational acceleration, and F is the wave force.

6. The method according to claim 1, characterized in that The flow field simulation equation is processed by the source term wave elimination through the following equation: q φ =-gr(φ-φ * ) Where 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.

7. The method according to claim 6, characterized in that Based on the three-dimensional model of the offshore photovoltaic platform after the grid division and the simulation equation, determining the wave phenomenon on the deck of the offshore photovoltaic platform, including: performing numerical simulation on each node on the three-dimensional model of the offshore photovoltaic platform after the grid division according to the simulation equation to determine the wave phenomenon of each node; The wave phenomenon on the deck of the offshore photovoltaic platform is determined by the wave phenomenon at each node.

8. A device for simulating wave phenomena on the deck of an offshore photovoltaic platform, characterized in that: include: An acquisition module is used to obtain geometric parameters of the offshore photovoltaic platform; A first data processing module is used to determine a three-dimensional model of the offshore photovoltaic platform based on the geometric parameters; A second data processing module is used to extract the computational domain of the three-dimensional model and perform mesh division to obtain a three-dimensional model of the offshore photovoltaic platform after mesh division; A 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 of the offshore photovoltaic platform after the grid division and the simulation equation; Among them, the simulation equations include force field simulation equations, flow field simulation equations, six-degree-of-freedom motion simulation equations of floating bodies, 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 elimination.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed in a computer, the computer is caused to execute the method according to any one of claims 1 to 7.

Images