Multi-physical-field simulation calculation method and system for high-voltage submarine cable anchoring device

Abstract

The invention discloses a multi-physical-field simulation calculation method and system for a high-voltage submarine cable anchoring device, and belongs to the technical field of ocean energy. The method comprises the following steps: constructing a finite element model of the submarine cable anchoring device based on a geometric model of the high-voltage submarine cable anchoring device; the finite element model of the submarine cable anchoring device carries out simulation area boundary condition and multi-physical field setting, after setting is completed, free tetrahedral mesh generation is carried out on a high-voltage submarine cable body and the anchoring device, the corresponding mesh size is selected according to the size of each part obtained after mesh generation, and the high-voltage submarine cable anchoring device is constructed. Obtaining a finite element simulation model of the submarine cable anchoring device; and in the finite element simulation model of the submarine cable anchoring device, performing multi-physics field coupling calculation to form a simulation calculation result. The method is based on finite element simulation software, three-dimensional modeling is carried out according to the actual arrangement condition of the high-voltage submarine cable anchoring device, and accurate description of physical fields around the anchoring device during operation of the high-voltage submarine cable is achieved.

Description

Technical Field

[0001] This invention relates to the field of marine energy technology, specifically to a multiphysics simulation calculation method and system for high-voltage submarine cable anchoring devices. Background Technology

[0002] The vigorous development of island economies and offshore wind power has spurred further research into marine energy transmission. As one of the main methods of marine energy transmission, submarine cables are widely used in domestic and international marine power transmission projects due to their ease of manufacture, safety, stability, and high economic efficiency. Among numerous marine energy transmission methods, submarine cables stand out with their significant advantages, becoming the core choice for domestic and international marine power transmission projects. Submarine cables are easy to manufacture and can be mass-produced to meet the needs of projects of varying scales; they possess extremely high safety and stability, reliably transmitting power in complex marine environments and reducing the risk of interruptions during energy transmission; simultaneously, they exhibit excellent economic performance, with lower total life-cycle costs compared to other transmission methods. Therefore, submarine cables are widely used in various marine power transmission projects, providing a solid energy transmission guarantee for island development and offshore wind power grid connection.

[0003] However, submarine cables face numerous challenges during operation, with their safe and reliable operation being a key issue. To prevent structural damage from external forces, submarine cables are typically anchored in geologically stable shallows, along the shore, or on structurally sound platforms. While this effectively secures the cable, it introduces new problems. During anchoring, the cable armor is directly grounded at the anchor point, placing the anchoring device in a complex working environment. It must withstand electrical, thermal, and mechanical forces, as well as the severe challenges of the marine environment, such as seawater corrosion, marine organism attachment, and temperature fluctuations. These factors interact, leading to abnormal heating in the anchoring device. This abnormal heating accelerates insulation thermal aging, severely impacting the service life of high-voltage submarine cables, increasing the risk of cable failure, and ultimately threatening the stability and reliability of marine energy transmission. Therefore, accurate simulation calculations of the temperature field of submarine cable anchoring devices and in-depth research into their temperature characteristics are of significant practical importance. This not only helps to identify potential problems with anchoring devices in advance and take targeted maintenance and improvement measures, but also provides a scientific basis for the design, selection and operation management of submarine cables, thereby ensuring the safe and stable operation of marine energy transmission systems.

[0004] However, current simulation research on submarine cable anchoring devices is significantly insufficient, and the exploration of the temperature characteristics of these devices is still in its early stages. Existing research mainly focuses on the application scenarios of submarine cable anchoring devices and different forms of cable anchoring, and designs various anchoring device structures accordingly. In terms of simulation calculations based on the finite element method, most studies focus on the cable itself, investigating only the temperature field and current-carrying characteristics of the cable in a single laying environment and under different laying environments, neglecting the influence of the anchoring device on the temperature field distribution of the cable. This results in an inability to accurately reflect the temperature field of the anchored section of the cable. Summary of the Invention

[0005] Existing finite element method (FEM) simulation studies of submarine cables often focus on the cable itself, neglecting the impact of anchoring devices on the cable's temperature field distribution, thus failing to accurately reflect the temperature field conditions of the anchored section. This invention provides a multiphysics simulation method for high-voltage submarine cable anchoring devices. Based on finite element simulation software, this method performs three-dimensional modeling according to the actual layout of the high-voltage submarine cable anchoring device, achieving an accurate description of the various physical fields surrounding the anchoring device during high-voltage submarine cable operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] In a first aspect, the present invention provides a multiphysics simulation calculation method for high-voltage submarine cable anchoring devices, comprising: Based on the geometric model of the high-voltage submarine cable anchoring device, a finite element model of the submarine cable anchoring device is constructed. The finite element model of the submarine cable anchoring device is used to set the boundary conditions and multiphysics fields of the simulation area. After the settings are completed, the high-voltage submarine cable body and anchoring device are meshed into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. In the finite element simulation model of the submarine cable anchoring device, multi-physics field coupling calculations are performed to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and the simulation calculation results are formed. The simulation results are compared with the actual measured temperature data to determine whether the error is within the set range. If it is, the calculation results are output.

[0008] As a further improvement of the present invention, the construction of a finite element model of the submarine cable anchoring device based on the geometric model of the high-voltage submarine cable anchoring device includes: Based on the actual structural data of the high-voltage submarine cable anchoring device, a geometric model of the high-voltage submarine cable anchoring device is constructed. In the geometric model of the high-voltage submarine cable anchoring device, the material and physical parameters of the high-voltage submarine cable and the high-voltage submarine cable anchoring device are added to form the finite element model of the submarine cable anchoring device.

[0009] As a further improvement of the present invention, the finite element model of the submarine cable anchoring device is configured with boundary conditions and multiphysics fields for the simulation area. After the configuration is completed, the high-voltage submarine cable body and the anchoring device are subjected to free tetrahedral meshing. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device, including: Constraints were set for the solid and fluid heat transfer module, magnetic field module, and turbulence module in the finite element model of the submarine cable anchoring device. The constraints included temperature boundary conditions, magnetic field current excitation, and fluid flow boundary conditions. Based on temperature boundary conditions, magnetic field current excitation and fluid flow boundary conditions, two multi-physics field coupling situations, namely non-isothermal flow and electromagnetic heat, were set up to obtain a simulation model of the submarine cable anchoring device. Based on the simulation model of the submarine cable anchoring device, the high-voltage submarine cable body and anchoring device are divided into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part, and a finite element simulation model after mesh division is established to obtain the finite element simulation model of the submarine cable anchoring device.

[0010] As a further improvement of the present invention, the temperature boundary condition includes: First type of boundary condition: The temperature at the boundary is constant.

[0011] In the formula, T For temperature; The boundary location applied for the first type of boundary condition; Given a known temperature value; Second type of boundary condition: Normal heat flux density at the boundary location is known.

[0012] In the formula, The thermal conductivity of the material; For temperature T In the direction of the boundary normal n The derivative on; The boundary location applied for the second type of boundary condition; Let be the known heat flux density at the boundary, where When, it indicates that heat is flowing into the system. When this occurs, it indicates that no heat passes through the boundary; When, it indicates that heat is flowing out of the system; Third type of boundary condition: The fluid temperature and the convective heat transfer coefficient between the object surface and the fluid at the boundary are known.

[0013] In the formula, The boundary location applied for the third type of boundary condition; h The convective heat transfer coefficient of the object surface; The surface temperature of the object; The ambient temperature surrounding the object.

[0014] 5. A multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 3, characterized in that the magnetic field current excitation boundary conditions include:

[0015] In the formula, E Electric field strength, V / m; H Magnetic field strength, A / m; J The conduction current density is expressed in A / m. 3 ; D The electric displacement vector is C / m. 2 ; B Let T be the magnetic flux density. Free charge density, C / m 3 ; This is a vector differential operator. The magnitude of the current excitation in the conductor is set in the coil module.

[0016] As a further improvement of the present invention, the fluid flow boundary conditions include:

[0017]

[0018] In the formula, The density of the fluid material is kg / m³. 3 ; v The velocity vector is in m / s. Pressure, Pa; μ The viscosity is dynamic, Pa·s; I It is the identity matrix; For the Nebra operator; This is the convective acceleration term; For the velocity gradient tensor; It is the transpose of the velocity gradient tensor.

[0019] As a further improvement of the present invention, multi-physics coupling calculations are performed in the finite element simulation model of the submarine cable anchoring device to obtain the temperature, magnetic field, and fluid velocity field distributions of the cable anchoring device, forming simulation calculation results, including: In the finite element simulation model of the submarine cable anchoring device, solver parameters are set and multiphysics coupling calculations are performed to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device under the target conditions, thus forming the simulation calculation results.

[0020] As a further improvement of the present invention, the step of comparing the simulation results with the actual measured temperature data to determine whether the error is within a set range, and if so, outputting the calculation results, includes: The simulated temperatures of various parts of the anchoring device are compared with the temperatures measured at fixed points on the surface of the anchoring device to obtain the error between the simulation results and the actual values. If the error between the simulation result and the actual value is within 5% for a given location, then the temperature, magnetic field, and fluid velocity field distribution at that location will be obtained, and the calculation results will be output. If the simulation result is more than 5% away from the actual result at a certain point, the environmental parameters and boundary conditions are reset, and the multiphysics coupling calculation is performed again until the temperature error is within 5%. The temperature, magnetic field and fluid flow field distribution at that point are obtained, and the calculation results are output.

[0021] Secondly, the present invention provides a multiphysics simulation calculation system for high-voltage submarine cable anchoring devices, comprising: Finite Element Model Module: Used to construct the finite element model of the submarine cable anchoring device based on the geometric model of the high-voltage submarine cable anchoring device; Finite element simulation model module: Used to set the boundary conditions and multiphysics fields of the finite element model of the submarine cable anchoring device. After the settings are completed, the high-voltage submarine cable body and anchoring device are meshed into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. Calculation Results Module: Used to perform multiphysics coupling calculations in the finite element simulation model of the submarine cable anchoring device, to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and to generate simulation calculation results; The result verification module is used to compare the simulation results with the actual measured temperature data to determine whether the error is within the set range. If it is, the calculation result is output.

[0022] Thirdly, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the multiphysics simulation calculation method for a high-voltage submarine cable anchoring device.

[0023] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the multiphysics simulation calculation method for a high-voltage submarine cable anchoring device.

[0024] Fifthly, the present invention provides a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the multiphysics simulation calculation method for a high-voltage submarine cable anchoring device.

[0025] Compared with the prior art, the present invention has the following beneficial effects: This method, based on the actual layout of high-voltage submarine cable anchoring devices, utilizes finite element simulation software for 3D modeling. This modeling approach abandons the previous coarse-grained methods that simplified or ignored key components, enabling a complete and accurate reproduction of the true geometric structure and spatial relationship between the anchoring device and the cable itself. Constructing such a detailed finite element model lays a solid foundation for subsequent accurate analysis of various physical field distributions, making the simulation results closer to reality and greatly improving the reliability and practicality of the research. Secondly, this method comprehensively sets the boundary conditions and multi-physics fields for the finite element model, covering multiple key physical fields such as temperature, magnetic field, and fluid velocity field. Furthermore, in the mesh generation stage, the corresponding mesh size is carefully selected based on the actual dimensions of each part after mesh generation. This refined processing ensures the calculation accuracy of each region, avoiding calculation errors caused by unreasonable mesh generation, and enabling high-precision multi-physics coupling calculations, thereby accurately obtaining the temperature, magnetic field, and fluid velocity field distributions of the cable anchoring device. Finally, this method meticulously compares the simulation results with the actual measured temperature data, ensuring the accuracy of the simulation results by strictly judging whether the error is within the set range. Calculation results are only output when the error is within a reasonable range. This rigorous verification mechanism ensures the reliability of the provided data. Based on these accurate and reliable simulation results, engineers can more scientifically evaluate the performance of high-voltage submarine cable anchoring devices under different operating conditions, predict potential problems in advance, and thus optimize the design parameters and layout of the anchoring devices, improving the overall safety and stability of the submarine cable system. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. In the drawings: Figure 1 This is a flowchart illustrating the multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to the present invention. Figure 2 This is a flowchart of the present invention; Figure 3 This is a three-dimensional schematic diagram of a submarine cable anchoring device model; Figure 4 This is a cross-sectional schematic diagram of a submarine cable anchoring device model; Figure 5 It is a schematic diagram of a 3D model in simulation software; Figure 6 This is a schematic diagram of the multiphysics simulation calculation system for a high-voltage submarine cable anchoring device according to the present invention. Figure 7 This is a schematic diagram of an electronic device in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures: 11 is the pressure cap, 12 is the connecting plate, 13 is the right pressure plate, 14 is the left pressure plate, 15 is the base, 16 is the pad, 17 is the lower main body, 18 is the upper main body; 21 is the connecting plate, 22 is the pressure plate, 23 is the pressure cap, 24 is the upper main body, 25 is the lower main body, and 26 is the base. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Existing finite element method-based simulation studies of submarine cables often focus on the cable itself, neglecting the impact of anchoring devices on the cable's temperature field distribution, thus failing to accurately reflect the temperature field conditions of the anchored section. This invention provides a multiphysics simulation calculation method for high-voltage submarine cable anchoring devices, such as... Figure 1 As shown, it includes: S100: Based on the geometric model of the high-voltage submarine cable anchoring device, a finite element model of the submarine cable anchoring device is constructed. S200: Set the boundary conditions and multiphysics field of the simulation area for the finite element model of the submarine cable anchoring device. After the setting is completed, perform free tetrahedral meshing on the high-voltage submarine cable body and anchoring device. Select the corresponding mesh size according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. S300: In the finite element simulation model of the submarine cable anchoring device, multi-physics field coupling calculations are performed to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and the simulation calculation results are formed. S400: Compare the simulation results with the actual measured temperature data to determine if the error is within the set range. If it is, output the calculation results.

[0031] This method is based on finite element simulation software and performs three-dimensional modeling according to the actual layout of the anchoring device of the high-voltage submarine cable, so as to achieve an accurate description of the physical fields around the anchoring device when the high-voltage submarine cable is running.

[0032] The present invention will be further explained below.

[0033] This invention provides a multiphysics simulation calculation method for high-voltage submarine cable anchoring devices, such as... Figure 2 As shown, it specifically includes the following: S1: Based on the actual structure of the high-voltage submarine cable anchoring device, a geometric model is established in the finite element simulation software; A geometric model of the submarine cable anchoring device was established, in which the cable body section, from the inside out, consists of the conductor core, conductor shielding layer, insulation layer, insulation shielding layer, buffer layer, metal sheath, inner lining layer, metal armor layer, and outer sheath. Based on the actual design parameters of the submarine cable anchoring device and the physical parameters of each structural material, a three-dimensional finite element simulation model of the anchoring device was established in multiphysics coupling simulation software. The anchoring device was parametrically modeled using simulation software. The model includes a pressure cap 11, connecting plate 12, right pressure plate 13, left pressure plate 14, base 15, pad 16, lower main body 17, and upper main body 18. A three-dimensional structural schematic diagram of the submarine cable anchoring device is shown below. Figure 3 As shown, the schematic diagram of the model cross-section is as follows. Figure 4 As shown.

[0034] S2: Based on the geometric model established in S1, the required simulation parameters are added to the material library according to the material and physical parameters of each structure of the high-voltage submarine cable and the high-voltage submarine cable anchoring device. The material is specified for each structure, and a complete finite element model is established to obtain the finite element model of the submarine cable anchoring device. Materials used in submarine cables include copper, semiconducting materials, cross-linked polyethylene (XLPE), lead alloys, polyethylene, polypropylene, asphalt, etc. Materials used in anchoring devices include brass, copper, stainless steel, etc. Physical parameters include thermal conductivity, constant pressure heat capacity, density, relative magnetic permeability, relative permittivity, and electrical conductivity.

[0035] S3: Based on the finite element model of the submarine cable anchoring device in S2, the constraint conditions of the solid and fluid heat transfer module, magnetic field module and turbulence module in the model are set respectively. The temperature conditions at the boundary of the model are set in the solid and fluid heat transfer module. The current magnitude in the conductor of the cable core passing through the anchoring device is set in the magnetic field module. Current excitation is added to the conductor. The fluid flow boundary conditions in the air region are set in the turbulence model. Temperature field boundary conditions are divided into three categories: First type of boundary condition: The temperature at the boundary is constant. (1) In the formula, T For temperature; The boundary location applied for the first type of boundary condition; Given a known temperature value; Second type of boundary condition: Normal heat flux density at the boundary location is known. (2) In the formula, The thermal conductivity of the material; For temperature T In the direction of the boundary normal n The derivative on; The boundary location applied for the second type of boundary condition; Let be the known heat flux density at the boundary, where When, it indicates that heat is flowing into the system. When this occurs, it indicates that no heat passes through the boundary; When, it indicates that heat is flowing out of the system.

[0036] Third type of boundary condition: The fluid temperature and the convective heat transfer coefficient between the object surface and the fluid at the boundary are known. (3) In the formula, The boundary location applied for the third type of boundary condition; h The convective heat transfer coefficient of the object surface; The surface temperature of the object; The ambient temperature surrounding the object.

[0037] The electromagnetic field control equations are expressed as follows: (4) In the formula, E Electric field strength, V / m; H Magnetic field strength, A / m; J The conduction current density is expressed in A / m. 3 ; D The electric displacement vector is C / m. 2 ; B Let T be the magnetic flux density. Free charge density, C / m 3 ; This is a vector differential operator. The magnitude of the current excitation in the conductor is set in the coil module.

[0038] The flow field equation is expressed as: (5) (6) In the formula, The density of the fluid material is kg / m³. 3 ; v The velocity vector is in m / s. Pressure, Pa; μ The viscosity is dynamic, Pa·s; I It is the identity matrix; For the Nebra operator; This is the convective acceleration term; For the velocity gradient tensor; It is the transpose of the velocity gradient tensor.

[0039] S4: Based on the boundary conditions of each physical field in S3, two multi-physical field coupling situations, namely non-isothermal flow and electromagnetic-thermal, are set to obtain the simulation model of the submarine cable anchoring device. S5: Based on the simulation model of the submarine cable anchoring device in S4, the high-voltage submarine cable body and anchoring device are subjected to free tetrahedral meshing. The corresponding mesh size is selected according to the size of each part, and the finite element simulation model after meshing is established to obtain the finite element simulation model of the submarine cable anchoring device. S6: Based on the finite element simulation model of the submarine cable anchoring device of S5, the solver parameters are set and multi-physics coupling calculation is performed to obtain the temperature, magnetic field and fluid velocity field distribution of each part of the anchoring device under a specific ambient temperature and a specific cable core current. S7: Based on the simulation results of S6, the temperature of each part of the anchoring device is compared with the temperature measurement results of the fixed-point temperature measuring device on the surface of the anchoring device to obtain the error between the simulation results and the actual values ​​at each point. S8: Based on the comparison results of S7, if the error of each point is within 5%, then the temperature distribution result obtained in S6 is the desired result; if there are points with errors outside 5%, then reset the environmental parameters and boundary conditions in S3, re-perform the multiphysics coupling calculation, and repeat S6~S9 until the temperature error at all points is within 5%, and obtain the accurate temperature, magnetic field and fluid flow field distribution.

[0040] The cable anchoring device is placed above the soil, with its base in contact with the soil via conduction. The remaining portion is in contact with the surrounding air via convection. The cable body in the simulation area is 1.5m long. The air region boundary is set as an open boundary, and the temperature gradient at the boundaries of the soil region is 0. Since the lower boundary of the soil is almost unaffected by the heating from the anchoring device, it is set to a fixed temperature. Heat transfer in the soil is via conduction. The entire simulation area consists of soil, the cable body, the anchoring device, and air. Solving the equations yields temperature and velocity distribution maps of the anchoring device and its surrounding environment. Based on these physical field distribution maps, the anchoring device and its surrounding conditions can be clearly understood.

[0041] In summary, this invention provides a multiphysics simulation calculation method for high-voltage submarine cable anchoring devices. This method includes creating a detailed three-dimensional model of the anchoring device, simulating the overall situation of the anchoring device in actual production, setting material parameters for the cable body and various structures of the anchoring device, setting constraints for temperature, magnetic field, and flow fields, and performing coupled calculations after setting the multiphysics coupling. The simulated temperatures at each point are compared with the temperature measurements from a fixed-point temperature measuring device in actual conditions. If the error is less than 5%, the distribution of each field obtained in the simulation is accurate. The three-dimensional simulation model established by this invention can accurately describe the structure of the submarine cable anchoring device and its surrounding environment under actual laying conditions. It is more intuitive and accurate than traditional temperature measurement methods, and can simultaneously observe the distribution of temperature, magnetic field, and fluid velocity fields around the anchoring device. This assists maintenance personnel in accurately identifying potential hot spots in the anchoring device and taking preventative measures, improving the operational safety of the anchoring device and the entire submarine cable system, increasing the work efficiency of operators, and improving economic benefits.

[0042] The second objective of this invention is to provide a multiphysics simulation calculation system for high-voltage submarine cable anchoring devices, such as... Figure 6 As shown, it includes: Finite Element Model Module 100: Used to construct the finite element model of the submarine cable anchoring device based on the geometric model of the high-voltage submarine cable anchoring device; Finite Element Simulation Model Module 200: Used to set the boundary conditions and multiphysics fields of the simulation area for the finite element model of the submarine cable anchoring device. After the settings are completed, the high-voltage submarine cable body and anchoring device are subjected to free tetrahedral meshing. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. Calculation Result Module 300: Used to perform multi-physics coupling calculations in the finite element simulation model of the submarine cable anchoring device, obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and form simulation calculation results; Result verification module 400: Used to compare the simulation results with the actual measured temperature data, determine whether the error is within the set range, and if so, output the calculation result.

[0043] like Figure 7 As shown, a third objective of this invention is to provide an electronic device comprising a processor 501, a memory 502, and a display screen 503. The memory 502 and the display screen 503 are both connected to the processor 501, such as via a bus 504. Optionally, the electronic device may further include a transceiver 505. It should be noted that in practical applications, the transceiver 505 is not limited to one type, and the structure of this electronic device does not constitute a limitation on the embodiments of this application.

[0044] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 501 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0045] Bus 504 may include a pathway for transmitting information between the aforementioned components. Bus 504 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 504 can be divided into address bus, data bus, control bus, etc.

[0046] The memory 502 may be a ROM (Read Only Memory) or other type of static storage device capable of storing static information and instructions, RAM (Random Access Memory) or other type of dynamic storage device capable of storing information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0047] The memory 502 is used to store application code that executes the solution of this application, and its execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 502 to implement the content shown in the foregoing method embodiments.

[0048] Figure 7 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0049] A fourth objective of this invention is to provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, performs the aforementioned functions. Figure 1 The illustrated method embodiments include various processes. For example, a memory may include instructions that can be executed by a processor of an electronic device to perform the described method.

[0050] A computer-readable storage medium can be a tangible device that holds and stores instructions used by an instruction execution device. A computer-readable storage medium can be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, a computer-readable storage medium can be a portable computer disk, a hard disk, a USB flash drive, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), staging random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory stick, floppy disk, optical disk, magnetic disk, mechanical encoding device, or any combination thereof.

[0051] A fifth objective of this invention is to provide a computer program product comprising computer instructions that, when executed by a processor, implement the above-described... Figure 1 The various processes of the method embodiments shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0052] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

[0053] The above content provides a further detailed description of the present invention. It should not be construed that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection of the present invention as defined by the submitted claims.

Claims

1. A multiphysics simulation calculation method for high-voltage submarine cable anchoring devices, characterized in that, include: Based on the geometric model of the high-voltage submarine cable anchoring device, a finite element model of the submarine cable anchoring device is constructed. The finite element model of the submarine cable anchoring device is used to set the boundary conditions and multiphysics fields of the simulation area. After the settings are completed, the high-voltage submarine cable body and anchoring device are meshed into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. In the finite element simulation model of the submarine cable anchoring device, multi-physics field coupling calculations are performed to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and the simulation calculation results are formed. The simulation results are compared with the actual measured temperature data to determine whether the error is within the set range. If it is, the calculation results are output.

2. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 1, characterized in that, The geometric model of the high-voltage submarine cable anchoring device is used to construct a finite element model of the submarine cable anchoring device, including: Based on the actual structural data of the high-voltage submarine cable anchoring device, a geometric model of the high-voltage submarine cable anchoring device is constructed. In the geometric model of the high-voltage submarine cable anchoring device, the material and physical parameters of the high-voltage submarine cable and the high-voltage submarine cable anchoring device are added to form the finite element model of the submarine cable anchoring device.

3. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 1, characterized in that, The finite element model of the submarine cable anchoring device is used to set the boundary conditions and multiphysics fields of the simulation area. After the settings are completed, the high-voltage submarine cable body and the anchoring device are subjected to free tetrahedral meshing. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device, including: Constraints were set for the solid and fluid heat transfer module, magnetic field module, and turbulence module in the finite element model of the submarine cable anchoring device. The constraints included temperature boundary conditions, magnetic field current excitation, and fluid flow boundary conditions. Based on temperature boundary conditions, magnetic field current excitation and fluid flow boundary conditions, two multi-physics field coupling situations, namely non-isothermal flow and electromagnetic heat, were set up to obtain a simulation model of the submarine cable anchoring device. Based on the simulation model of the submarine cable anchoring device, the high-voltage submarine cable body and anchoring device are divided into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part, and a finite element simulation model after mesh division is established to obtain the finite element simulation model of the submarine cable anchoring device.

4. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 3, characterized in that, The temperature boundary conditions include: First type of boundary condition: The temperature at the boundary is constant. In the formula, T For temperature; The boundary location applied for the first type of boundary condition; Given a known temperature value; Second type of boundary condition: Normal heat flux density at the boundary location is known. In the formula, The thermal conductivity of the material; For temperature T In the direction of the boundary normal n The derivative on; The boundary location applied for the second type of boundary condition; Let be the known heat flux density at the boundary, where When, it indicates that heat is flowing into the system. When this occurs, it indicates that no heat passes through the boundary; When, it indicates that heat is flowing out of the system; Third type of boundary condition: The fluid temperature and the convective heat transfer coefficient between the object surface and the fluid at the boundary are known. In the formula, The boundary location applied for the third type of boundary condition; h The convective heat transfer coefficient of the object surface; The surface temperature of the object; The ambient temperature surrounding the object.

5. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 3, characterized in that, The magnetic field current excitation boundary conditions include: In the formula, E Electric field strength, V / m; H Magnetic field strength, A / m; J The conduction current density is expressed in A / m. 3 ; D The electric displacement vector is C / m. 2 ; B Let T be the magnetic flux density. Free charge density, C / m 3 ; It is a vector differential operator; the magnitude of the current excitation in the conductor core is set in the coil module.

6. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 3, characterized in that, The fluid flow boundary conditions include: In the formula, The density of the fluid material is kg / m³. 3 ; v The velocity vector is in m / s; Pressure, Pa; μ The viscosity is dynamic, Pa·s; I It is the identity matrix; For the Nebula operator; This is the convective acceleration term; For the velocity gradient tensor; It is the transpose of the velocity gradient tensor.

7. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 1, characterized in that, In the finite element simulation model of the submarine cable anchoring device, multiphysics coupling calculations are performed to obtain the temperature, magnetic field, and fluid velocity field distributions of the cable anchoring device, forming simulation results, including: In the finite element simulation model of the submarine cable anchoring device, solver parameters are set and multiphysics coupling calculations are performed to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device under the target conditions, thus forming the simulation calculation results.

8. The multiphysics simulation calculation method for a high-voltage submarine cable anchoring device according to claim 1, characterized in that, The process involves comparing the simulation results with the actual measured temperature data to determine if the error is within a set range. If so, the calculation results are output, including: The simulated temperatures of various parts of the anchoring device are compared with the temperatures measured at fixed points on the surface of the anchoring device to obtain the error between the simulation results and the actual values. If the error between the simulation result and the actual value is within 5% for a given location, then the temperature, magnetic field, and fluid velocity field distribution at that location will be obtained, and the calculation results will be output. If the simulation result is more than 5% away from the actual result at a certain point, the environmental parameters and boundary conditions are reset, and the multiphysics coupling calculation is performed again until the temperature error is within 5%. The temperature, magnetic field and fluid flow field distribution at that point are obtained, and the calculation results are output.

9. A multiphysics simulation calculation system for a high-voltage submarine cable anchoring device, characterized in that, include: Finite Element Model Module: Used to construct the finite element model of the submarine cable anchoring device based on the geometric model of the high-voltage submarine cable anchoring device; Finite element simulation model module: Used to set the boundary conditions and multiphysics fields of the finite element model of the submarine cable anchoring device. After the settings are completed, the high-voltage submarine cable body and anchoring device are meshed into free tetrahedral meshes. The corresponding mesh size is selected according to the size of each part after meshing to obtain the finite element simulation model of the submarine cable anchoring device. Calculation Results Module: Used to perform multiphysics coupling calculations in the finite element simulation model of the submarine cable anchoring device, to obtain the temperature, magnetic field and fluid velocity field distribution of the cable anchoring device, and to generate simulation calculation results; The result verification module is used to compare the simulation results with the actual measured temperature data to determine whether the error is within the set range. If it is, the calculation result is output.

10. An electronic device, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the multiphysics simulation calculation method for a high-voltage submarine cable anchoring device as described in any one of claims 1-8.

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