Submarine cable stress analysis method and apparatus, computer device and storage medium

Abstract

The present application relates to the technical field of simulation, and relates to a submarine cable stress analysis method. The method comprises: establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model comprises a mechanics module and a fluid module, the mechanics module comprises a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer coating layer, and the fluid module comprises an inner flow region and an outer flow region; configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model; coupling the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and performing a simulation test on the coupled submarine cable simulation model to obtain a simulation result, and performing submarine cable stress analysis on the basis of the simulation result.

Description

Submarine cable stress analysis method, device, computer equipment and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on August 11, 2023, with application number CN202311015368.0 and entitled “Submarine Cable Stress Analysis Method, Device, Computer Equipment and Storage Medium,” all contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of simulation technology, and in particular to a submarine cable stress analysis method, apparatus, computer equipment, and storage medium. Background Art

[0004] With the rapid development of offshore wind power in recent years, the number and length of submarine cables, a crucial electrical component of offshore wind power projects, have increased significantly year by year. Compared to terrestrial cables, submarine cables operate in harsher environments, and their safe operation is often impacted by the natural environment and offshore operations. For example, during routine operation, submarine cables can be eroded by ocean currents and other factors, leaving them exposed or even suspended in the seawater. This erosion of suspended cables can easily cause vortex-induced vibrations, leading to mechanical fatigue and seriously threatening their mechanical and electrical performance.

[0005] However, the inventors realized that traditional technologies did not take into account the environmental impact of vortex-induced vibration when monitoring the operating status of submarine cables. They only monitored the cables by deploying specific sensors, which was incomplete and resulted in poor monitoring results.

[0006] Summary of the Invention

[0007] According to various embodiments disclosed in the present application, a submarine cable stress analysis method, apparatus, computer equipment, and storage medium are provided that can improve monitoring effects.

[0008] A submarine cable stress analysis method includes:

[0009] Establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module including a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module including an inner flow domain and an outer flow domain;

[0010] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0011] Coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0012] A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

[0013] A submarine cable stress analysis device comprising:

[0014] a model building module, configured to build an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module including a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module including an inner flow domain and an outer flow domain;

[0015] A model configuration module, configured to configure the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0016] a coupling module, configured to couple the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0017] The simulation test module is used to perform a simulation test on the coupled submarine cable simulation model to obtain simulation results, and perform submarine cable stress analysis based on the simulation results.

[0018] A computer device includes a memory and one or more processors, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processors, the one or more processors perform the following steps:

[0019] Establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module including a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module including an inner flow domain and an outer flow domain;

[0020] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0021] Coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0022] A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

[0023] One or more computer-readable storage media storing computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the following steps:

[0024] Establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module including a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module including an inner flow domain and an outer flow domain;

[0025] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0026] Coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0027] A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

[0028] A computer program product, comprising a computer program, which, when executed by a processor, causes the processor or processors to perform the following steps:

[0029] Establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module including a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module including an inner flow domain and an outer flow domain;

[0030] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0031] Coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0032] A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

[0033] The above-mentioned submarine cable stress analysis method, device, computer equipment and storage medium establish an initial submarine cable simulation model including a mechanical module and a fluid module, configure the initial submarine cable simulation model to obtain a final submarine cable simulation model, couple the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model, perform simulation tests on the coupled submarine cable simulation model, and perform submarine cable stress analysis based on the simulation results. Compared with the problem of poor monitoring effect in traditional technologies, the present application establishes an initial submarine cable simulation model, the initial submarine cable simulation model includes a fluid module, takes into account the influence of seawater, and performs more comprehensive status monitoring of the submarine cable. The initial submarine cable simulation model is configured and coupled, and simulation tests are performed on the coupled submarine cable simulation model. Submarine cable stress analysis is performed based on the simulation results. Submarine cable stress analysis performed through simulation tests can consider the influence of the force on the submarine cable and improve the monitoring effect.

[0034] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] FIG1 is a diagram illustrating an application scenario of a submarine cable stress analysis method according to one or more embodiments;

[0037] FIG2 is a schematic flow chart of a submarine cable stress analysis method according to one or more embodiments;

[0038] FIG3 is a schematic diagram of a mechanics module of an initial submarine cable simulation model according to one or more embodiments;

[0039] FIG4 is a schematic diagram of a fluid module providing an initial submarine cable simulation model according to one or more embodiments;

[0040] FIG5 is a schematic diagram of a process for configuring an initial submarine cable simulation model according to one or more embodiments;

[0041] FIG6 is a schematic diagram of a mesh after a mechanics module is divided according to one or more embodiments;

[0042] FIG7 is a schematic diagram of a process for obtaining simulation results according to one or more embodiments;

[0043] FIG8 is a schematic diagram of providing a sampling line segment according to one or more embodiments;

[0044] FIG9 is a schematic diagram of a stress spatiotemporal distribution curve of a torsion structure layer according to one or more embodiments;

[0045] FIG10 is a schematic diagram of a vortex-induced vibration amplitude curve of a submarine cable according to one or more embodiments;

[0046] FIG11 is a schematic diagram of stress distribution curves of various structural layers along sampling line segments according to one or more embodiments;

[0047] FIG12 is a structural block diagram of a submarine cable stress analysis device provided according to one or more embodiments;

[0048] FIG13 is a diagram illustrating the internal structure of a computer device according to one or more embodiments. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0050] The submarine cable stress analysis method provided in this application can be applied in the application environment shown in Figure 1. A terminal 102 communicates with a computer device 104 via a network. The computer device 104 establishes an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module. The mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filler layer, an armor layer, and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin. The computer device 104 configures the initial submarine cable simulation model to obtain a final submarine cable simulation model. The computer device 104 couples the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model. The computer device 104 performs a simulation test on the coupled submarine cable simulation model to obtain simulation results, and performs submarine cable stress analysis based on the simulation results. The terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablet computers, and portable wearable devices.

[0051] In one embodiment, as shown in FIG2 , a method for analyzing submarine cable stress is provided. This method is described using the computer device shown in FIG1 as an example. It is understood that the method can also be applied to a server, or to a system including a computer device and a server, and implemented through interaction between the computer device and the server. The method includes the following steps:

[0052] S101, establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin.

[0053] The initial submarine cable simulation model is based on the actual submarine cable structure and environment. The mechanics module reflects the actual submarine cable structure, and the fluid module reflects the actual submarine cable environment.

[0054] Specifically, the initial submarine cable simulation model is, for example, a YJQ41 type 110kV single-core XLPE insulated optical fiber composite submarine cable, and a schematic diagram of a mechanical module of the initial submarine cable simulation model is provided, as shown in FIG3 . The mechanical module shown in FIG3 includes a copper conductor 1, an insulating layer 2, a lead alloy sheath 3, a high-density polyethylene (HDPE) sheath 4, a polyethylene terephthalate (PET) filling layer 5, an armor layer 6, and an outer layer 7. A schematic diagram of a fluid module of an initial submarine cable simulation model is also provided, as shown in FIG4 . The fluid module shown in FIG4 includes an inner flow basin 8 and an outer flow basin 9. The inner flow basin is the seawater flow basin close to the submarine cable, and the outer flow basin is the seawater flow basin within a certain range excluding the inner flow basin.

[0055] It should be understood that the mechanical module and fluid module of the initial submarine cable simulation model shown in Figures 3 and 4 do not constitute a limitation on the mechanical module and fluid module of the initial submarine cable simulation model, and the corresponding included parts can be increased or decreased according to actual conditions.

[0056] S202: configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model.

[0057] Here, the initial submarine cable simulation model is configured based on the material parameters, simulation test requirements and environment of the actual submarine cable. The final submarine cable simulation model can well match the actual situation of the submarine cable.

[0058] S203 , coupling the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model.

[0059] In some embodiments, the mechanical module and the fluid module in the final submarine cable simulation model are coupled, including: setting the simulation step size, total simulation time and number of iterations of the coupling solver based on the situation that the submarine cable is in vortex-induced vibration.

[0060] The coupled submarine cable simulation model can transmit the force of seawater on the submarine cable, and can also transmit the displacement information of the submarine cable.

[0061] S204, performing a simulation test on the coupled submarine cable simulation model to obtain simulation results, and performing submarine cable stress analysis based on the simulation results.

[0062] In some embodiments, simulation tests can be performed by changing the configuration and coupling settings of the coupled submarine cable simulation model to obtain different simulation results.

[0063] In the above-mentioned submarine cable stress analysis method, an initial submarine cable simulation model including a mechanical module and a fluid module is established, and the initial submarine cable simulation model is configured to obtain a final submarine cable simulation model. The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain a coupled submarine cable simulation model. A simulation test is performed on the coupled submarine cable simulation model, and submarine cable stress analysis is performed based on the simulation results. Compared to the problem of poor monitoring effect in traditional technologies, this embodiment establishes an initial submarine cable simulation model that includes a fluid module, takes into account the influence of seawater, and provides more comprehensive submarine cable status monitoring. The initial submarine cable simulation model is configured and coupled, and a simulation test is performed on the coupled submarine cable simulation model. Submarine cable stress analysis is performed based on the simulation results. Submarine cable stress analysis performed through simulation tests can consider the influence of submarine cable stress, thereby improving monitoring effect.

[0064] In one embodiment, a flow chart of configuring the initial submarine cable simulation model is shown in FIG5 , and includes the following contents:

[0065] S501 , setting material parameters for the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting.

[0066] Among them, material parameter settings can be set in advance manually.

[0067] S502 , meshing the submarine cable simulation model after parameter setting according to a preset method to obtain a meshed submarine cable simulation model.

[0068] S503, setting physical field boundary conditions for the divided submarine cable simulation model.

[0069] The technical solution, material parameter settings and physical field boundary condition settings of this embodiment can be closer to the actual situation of submarine cables, and the grid division can ensure the accuracy of the simulation results.

[0070] In one embodiment, setting material parameters for the initial submarine cable simulation model includes:

[0071] Setting the Poisson's ratio, elastic modulus and density of the materials used in each part of the mechanical module in the initial submarine cable simulation model;

[0072] Setting the density and dynamic viscosity of the fluid module in the initial submarine cable simulation model.

[0073] Here, the material parameter settings of the initial submarine cable simulation model are given as an example, as shown in Table 1 below:

[0074] Among them, seawater is the material of the fluid module.

[0075] It should be understood that the specific values ​​shown in Table 1 are merely examples and do not constitute numerical limitations for setting material parameters for the initial submarine cable simulation model.

[0076] The technical solution of this embodiment sets the material parameters of the mechanical module and the fluid module in the initial submarine cable simulation model, taking into account Poisson's ratio, elastic modulus, density and dynamic viscosity. This is a more comprehensive consideration and can better fit the submarine cable itself and the environment in which it is located.

[0077] In one embodiment, meshing the submarine cable simulation model after parameter setting is performed in a preset manner, including:

[0078] The swept meshing method is used to mesh the fluid module in the submarine cable simulation model after parameter setting;

[0079] The mapped meshing method is used to mesh the mechanical module in the submarine cable simulation model after parameter setting.

[0080] In some embodiments, meshing the fluid module in the parameter-set submarine cable simulation model using swept meshing includes meshing the surface using quadrilaterals and refining the internal flow domain mesh. Refining the internal flow domain mesh ensures the accuracy of the fluid module simulation results. For details, see the schematic diagram of meshing in Figure 4.

[0081] In other embodiments, a mapped meshing method is used to mesh the mechanical module in the submarine cable simulation model after parameter setting, including meshing the mechanical module in a structural hexahedron manner. Specifically, a schematic diagram of the mechanical module after meshing is shown in FIG6 .

[0082] The technical solution of this embodiment divides the submarine cable simulation model after parameter setting into grids according to a preset method, which can ensure the accuracy of the simulation results.

[0083] In one embodiment, the fluid module further includes an inlet, an outlet, and a boundary wall, such as 10 for the inlet, 11 for the outlet, and 12 for the boundary wall in FIG4 ; setting physical field boundary conditions for the divided submarine cable simulation model includes:

[0084] Setting the water velocity, fluid gravity and fluid buoyancy in the fluid module of the divided submarine cable simulation model through the inlet, outlet and boundary wall;

[0085] Gravity is set for the mechanical module in the divided submarine cable simulation model, and fixed supports are set at both ends of the mechanical module.

[0086] In some embodiments, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module in the divided submarine cable simulation model are set so that the fluid type of the fluid module is turbulent.

[0087] The technical solution of this embodiment sets fixed supports at both ends of the mechanical module, which can simulate the suspended state of the submarine cable. By setting the inlet, outlet and boundary wall, the water flow velocity, fluid gravity and fluid buoyancy are set to simulate the environment in which the submarine cable is located, which can better fit the submarine cable itself and the environment in which it is located.

[0088] In one embodiment, a simulation test is performed on the coupled submarine cable simulation model to obtain a simulation result, as shown in FIG7 , which includes the following contents:

[0089] S701: Use any part of the mechanical module in the coupled submarine cable simulation model as a torque structure layer.

[0090] The torsional structure layer may be a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer or an outer layer.

[0091] S702: Determine a preset straight line sampling path on the torsion structure layer, and determine sampling points on the preset straight line sampling path based on the twist pitch.

[0092] In some embodiments, the preset straight line sampling path is determined on the torsional structure layer according to the direction of coastal water flow, and the preset straight line sampling path is determined by a preset cross-sectional angle value, wherein the preset angle values ​​include 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees.

[0093] S703: Connect the sampling points in a preset manner to obtain sampling line segments.

[0094] The preset method may be a spiral extension method.

[0095] Here, a schematic diagram of a sampling line segment is provided, as shown in Figure 8. The points in Figure 8 are sampling points, and the sampling points are connected in a spiral extension manner to obtain the sampling line segment of the torsion structure layer.

[0096] S704, performing a simulation test on the coupled submarine cable simulation model, and obtaining a stress spatiotemporal distribution curve of the torsional structural layer based on the sampling line segments.

[0097] In some embodiments, a schematic diagram of a spatiotemporal stress distribution curve for a torsion structure layer is provided, as shown in FIG9 . The coordinate axes of FIG9 are stress value, axial distance, and time, respectively. The axial distance is the vertical distance from a position on the submarine cable to the fixed end where the cable is installed, along the direction of coastal water flow.

[0098] The technical solution of this embodiment can obtain the spatiotemporal stress distribution of the torsional structure layer by determining the sampling line segments of the torsional structure layer and extracting the stress data of the sampling points at different times, so as to be used for submarine cable stress analysis, making submarine cable stress analysis simpler and more convenient.

[0099] In some embodiments, a simulation test is performed on the coupled submarine cable simulation model to obtain various simulation results, which are not specifically limited. For example, the simulation results include a vortex-induced vibration amplitude curve of the submarine cable and a stress distribution curve of each structural layer along the sampling line segment.

[0100] Among them, the schematic diagram of the vortex-induced vibration amplitude curve of the submarine cable is shown in Figure 10, where the horizontal axis of Figure 10 is time and the vertical axis is the cross-flow amplitude. The dotted line in Figure 10 represents the case where the water flow velocity is 1.6 meters per second, and the solid line represents the case where the water flow velocity is 4.4 meters per second. The schematic diagram of the stress distribution curve of each structural layer along the sampling line segment is shown in Figure 11, where the horizontal axis in Figure 11 is the axial distance and the vertical axis is the stress value. Figure 11 shows the stress distribution curves of the polyethylene terephthalate filling layer, lead alloy sheath and armor layer at the same time, where the axial distance is the direction of coastal water flow, and the vertical distance between a certain position of the submarine cable and the fixed end where the cable is installed.

[0101] The technical solution of this embodiment monitors the operating status of the submarine cable under vortex-induced vibration conditions through simulation, and obtains the stress distribution of the torsional structure layer, providing a theoretical basis for the operation, maintenance and status monitoring of the submarine cable.

[0102] It should be understood that, although the various steps in the flowcharts of Figures 2-7 are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in Figures 2-7 may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0103] In one embodiment, as shown in FIG12 , a submarine cable stress analysis device is provided, comprising: a model building module 1201 , a model configuration module 1202 , a coupling module 1203 and a simulation test module 1204 , wherein:

[0104] The model building module 1201 is used to build an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module. The mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer. The fluid module includes an inner flow basin and an outer flow basin.

[0105] The model configuration module 1202 is used to configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;

[0106] A coupling module 1203 is used to couple the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model;

[0107] The simulation test module 1204 is used to perform a simulation test on the coupled submarine cable simulation model, obtain simulation results, and perform submarine cable stress analysis based on the simulation results.

[0108] In one embodiment, the model configuration module 1202 includes:

[0109] A parameter setting unit is used to set material parameters of the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting;

[0110] A grid division unit is used to perform grid division on the submarine cable simulation model after parameter setting according to a preset method to obtain a divided submarine cable simulation model;

[0111] The condition setting unit is used to set the physical field boundary conditions for the divided submarine cable simulation model.

[0112] In one embodiment, the parameter setting unit includes:

[0113] The mechanical module parameter setting subunit is used to set the Poisson's ratio, elastic modulus and density of the material used in each part of the mechanical module in the initial submarine cable simulation model;

[0114] The fluid module parameter setting subunit is used to set the density and dynamic viscosity of the fluid module in the initial submarine cable simulation model.

[0115] In one embodiment, the grid division unit includes:

[0116] The fluid module meshing subunit is used to mesh the fluid module in the submarine cable simulation model after parameter setting using a swept meshing method;

[0117] The mechanics module meshing subunit is used to mesh the mechanics module in the submarine cable simulation model after parameter setting using a mapping meshing method.

[0118] In one embodiment, the fluid module further includes an inlet, an outlet, and a boundary wall; and the condition setting unit includes:

[0119] The fluid module condition setting subunit is used to set the water flow velocity, fluid gravity and fluid buoyancy in the fluid module of the divided submarine cable simulation model through the inlet, outlet and boundary wall;

[0120] The mechanical module condition setting subunit is used to set the gravity of the mechanical module in the divided submarine cable simulation model and to set fixed supports at both ends of the mechanical module.

[0121] In one embodiment, the simulation test module 1204 includes:

[0122] a torque structure layer determining unit, configured to use any included part of the mechanics module in the coupled submarine cable simulation model as a torque structure layer;

[0123] a sampling point determination unit, configured to determine a preset straight line sampling path on the torsion structure layer, and determine sampling points on the preset straight line sampling path based on the twist pitch;

[0124] A sampling line segment acquisition unit, configured to connect the sampling points in a preset manner to obtain a sampling line segment;

[0125] The simulation test unit is used to perform simulation tests on the coupled submarine cable simulation model and obtain the stress spatiotemporal distribution curve of the torsional structural layer based on the sampling line segments.

[0126] The specific definitions of the submarine cable stress analysis device can be found in the definitions of the submarine cable stress analysis method described above and will not be further elaborated here. Each module in the aforementioned submarine cable stress analysis device can be implemented in whole or in part through software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0127] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in FIG13 . The computer device includes a processor, a memory, a network interface, and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile or volatile storage medium and an internal memory. The non-volatile or volatile storage medium stores an operating system, computer-readable instructions, and a database. The internal memory provides an environment for the operation of the operating system and computer-readable instructions in the non-volatile storage medium. The database of the computer device is used to store submarine cable stress analysis data. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer-readable instructions are executed by the processor, a submarine cable stress analysis method is implemented.

[0128] Those skilled in the art will understand that the structure shown in FIG13 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0129] A computer device includes a memory and one or more processors, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processors, the one or more processors perform the following steps:

[0130] Establish an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module. The mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer. The fluid module includes an inner flow basin and an outer flow basin.

[0131] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0132] Coupling the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0133] A simulation test is carried out on the coupled submarine cable simulation model to obtain simulation results, and submarine cable stress analysis is performed based on the simulation results.

[0134] In one embodiment, when the processor executes the computer-readable instructions, the processor further implements the following steps:

[0135] Setting material parameters for the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting;

[0136] Meshing the submarine cable simulation model after parameter setting according to a preset method to obtain a meshed submarine cable simulation model;

[0137] Set the physical field boundary conditions for the divided submarine cable simulation model.

[0138] In one embodiment, when the processor executes the computer-readable instructions, the processor further implements the following steps:

[0139] Setting the Poisson's ratio, elastic modulus and density of the materials used in each part of the mechanical module in the initial submarine cable simulation model;

[0140] Setting the density and dynamic viscosity of the fluid module in the initial submarine cable simulation model.

[0141] In one embodiment, when the processor executes the computer-readable instructions, the processor further implements the following steps:

[0142] The swept meshing method is used to mesh the fluid module in the submarine cable simulation model after parameter setting;

[0143] The mapped meshing method is used to mesh the mechanical module in the submarine cable simulation model after parameter setting.

[0144] In one embodiment, when the processor executes the computer-readable instructions, the processor further implements the following steps:

[0145] The fluid module further includes an inlet, an outlet, and a boundary wall; the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the divided submarine cable simulation model are set through the inlet, outlet, and boundary wall;

[0146] Gravity is set for the mechanical module in the divided submarine cable simulation model, and fixed supports are set at both ends of the mechanical module.

[0147] In one embodiment, when the processor executes the computer-readable instructions, the processor further implements the following steps:

[0148] Any included part of the mechanics module in the coupled submarine cable simulation model is used as a torque structure layer;

[0149] Determining a preset straight line sampling path on the torsion structure layer, and determining sampling points on the preset straight line sampling path based on the twist pitch;

[0150] The sampling points are connected in a preset manner to obtain sampling line segments;

[0151] A simulation test was carried out on the coupled submarine cable simulation model, and the stress spatiotemporal distribution curve of the torsional structural layer was obtained based on the sampling line segments.

[0152] One or more computer-readable storage media storing computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the following steps:

[0153] Establish an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module. The mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer. The fluid module includes an inner flow basin and an outer flow basin.

[0154] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0155] Coupling the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0156] A simulation test is carried out on the coupled submarine cable simulation model to obtain simulation results, and submarine cable stress analysis is performed based on the simulation results.

[0157] The computer-readable storage medium may be non-volatile or volatile.

[0158] In one embodiment, the computer readable instructions, when executed by a processor, further implement the following steps:

[0159] Setting material parameters for the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting;

[0160] Meshing the submarine cable simulation model after parameter setting according to a preset method to obtain a meshed submarine cable simulation model;

[0161] Set the physical field boundary conditions for the divided submarine cable simulation model.

[0162] In one embodiment, the computer readable instructions, when executed by a processor, further implement the following steps:

[0163] Setting the Poisson's ratio, elastic modulus and density of the materials used in each part of the mechanical module in the initial submarine cable simulation model;

[0164] Setting the density and dynamic viscosity of the fluid module in the initial submarine cable simulation model.

[0165] In one embodiment, the computer readable instructions, when executed by a processor, further implement the following steps:

[0166] The swept meshing method is used to mesh the fluid module in the submarine cable simulation model after parameter setting;

[0167] The mapped meshing method is used to mesh the mechanical module in the submarine cable simulation model after parameter setting.

[0168] In one embodiment, the computer readable instructions, when executed by a processor, further implement the following steps:

[0169] The fluid module further includes an inlet, an outlet, and a boundary wall; the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the divided submarine cable simulation model are set through the inlet, outlet, and boundary wall;

[0170] Gravity is set for the mechanical module in the divided submarine cable simulation model, and fixed supports are set at both ends of the mechanical module.

[0171] In one embodiment, the computer readable instructions, when executed by a processor, further implement the following steps:

[0172] Any included part of the mechanics module in the coupled submarine cable simulation model is used as a torque structure layer;

[0173] Determining a preset straight line sampling path on the torsion structure layer, and determining sampling points on the preset straight line sampling path based on the twist pitch;

[0174] The sampling points are connected in a preset manner to obtain sampling line segments;

[0175] A simulation test was carried out on the coupled submarine cable simulation model, and the stress spatiotemporal distribution curve of the torsional structural layer was obtained based on the sampling line segments.

[0176] A computer program product comprises a computer program, which, when executed by a processor, causes one or more processors to perform the following steps:

[0177] Establish an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module. The mechanical module includes a copper conductor, an insulation layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer, and an outer layer. The fluid module includes an inner flow basin and an outer flow basin.

[0178] configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model;

[0179] Coupling the mechanics module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and

[0180] A simulation test is carried out on the coupled submarine cable simulation model to obtain simulation results, and submarine cable stress analysis is performed based on the simulation results.

[0181] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0182] Setting material parameters for the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting;

[0183] Meshing the submarine cable simulation model after parameter setting according to a preset method to obtain a meshed submarine cable simulation model;

[0184] Set the physical field boundary conditions for the divided submarine cable simulation model.

[0185] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0186] Setting the Poisson's ratio, elastic modulus and density of the materials used in each part of the mechanical module in the initial submarine cable simulation model;

[0187] Setting the density and dynamic viscosity of the fluid module in the initial submarine cable simulation model.

[0188] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0189] The swept meshing method is used to mesh the fluid module in the submarine cable simulation model after parameter setting;

[0190] The mapped meshing method is used to mesh the mechanical module in the submarine cable simulation model after parameter setting.

[0191] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0192] The fluid module further includes an inlet, an outlet, and a boundary wall; the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the divided submarine cable simulation model are set through the inlet, outlet, and boundary wall;

[0193] Gravity is set for the mechanical module in the divided submarine cable simulation model, and fixed supports are set at both ends of the mechanical module.

[0194] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0195] Any included part of the mechanics module in the coupled submarine cable simulation model is used as a torque structure layer;

[0196] Determining a preset straight line sampling path on the torsion structure layer, and determining sampling points on the preset straight line sampling path based on the twist pitch;

[0197] The sampling points are connected in a preset manner to obtain sampling line segments;

[0198] A simulation test was carried out on the coupled submarine cable simulation model, and the stress spatiotemporal distribution curve of the torsional structural layer was obtained based on the sampling line segments.

[0199] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through computer-readable instructions. The computer-readable instructions can be stored in a non-volatile computer-readable storage medium. When the computer-readable instructions are executed, they can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0200] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0201] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for analyzing stress of a submarine cable, comprising: Establishing an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module includes a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin; configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model; Coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

2. The method according to claim 1, wherein: The configuring the initial submarine cable simulation model comprises: Setting material parameters for the initial submarine cable simulation model to obtain a submarine cable simulation model after parameter setting; Meshing the submarine cable simulation model after the parameter setting according to a preset method to obtain a meshed submarine cable simulation model; and The physical field boundary conditions are set for the divided submarine cable simulation model.

3. The method according to claim 2, wherein: The material parameter setting of the initial submarine cable simulation model includes: Setting the Poisson's ratio, elastic modulus and density of the material used for each part of the mechanical module in the initial submarine cable simulation model; and The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.

4. The method according to claim 2, wherein: The gridding of the submarine cable simulation model after the parameter setting according to a preset method includes: Meshing the fluid module in the submarine cable simulation model after the parameter setting by using a swept meshing method; and The mechanical module in the submarine cable simulation model after the parameter setting is meshed by using a mapping meshing method.

5. The method according to claim 2, wherein: The fluid module further includes an inlet, an outlet and a boundary wall; the physical field boundary condition setting for the divided submarine cable simulation model includes: Setting the water flow velocity, fluid gravity and fluid buoyancy in the fluid module in the divided submarine cable simulation model through the inlet, the outlet and the boundary wall; and Gravity is set for the mechanical module in the divided submarine cable simulation model, and fixed supports are set at both ends of the mechanical module.

6. The method according to any one of claims 1 to 5, wherein: The performing of a simulation test on the coupled submarine cable simulation model to obtain a simulation result includes: Using any included part of the mechanical module in the coupled submarine cable simulation model as a torque structure layer; Determining a preset straight line sampling path on the torsion structure layer, and determining sampling points on the preset straight line sampling path based on the twisting pitch; Connecting the sampling points in a preset manner to obtain sampling line segments; and A simulation test is performed on the coupled submarine cable simulation model, and a stress spatiotemporal distribution curve of the torsion structure layer is obtained based on the sampling line segment.

7. A submarine cable stress analysis device, comprising: A model building module, used to build an initial submarine cable simulation model, wherein the initial submarine cable simulation model includes a mechanical module and a fluid module, the mechanical module includes a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin; The model configuration module is used to configure the initial submarine cable simulation model to obtain the final submarine cable simulation model. type; a coupling module, used for coupling the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model; and The simulation test module is used to perform a simulation test on the coupled submarine cable simulation model to obtain simulation results, and perform submarine cable stress analysis based on the simulation results.

8. A computer device comprising a memory and one or more processors, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the one or more processors perform the following steps: Establish an initial submarine cable simulation model, where: The initial submarine cable simulation model includes a mechanical module and a fluid module, wherein the mechanical module includes a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin; configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model; The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain a coupled submarine cable simulation model; and A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

9. One or more computer-readable storage media storing computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the following steps: Establish an initial submarine cable simulation model, where: The initial submarine cable simulation model includes a mechanical module and a fluid module, wherein the mechanical module includes a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin; configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model; The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain a coupled submarine cable simulation model; and A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

10. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program causes the processor or processors to perform the following steps: Establish an initial submarine cable simulation model, where: The initial submarine cable simulation model includes a mechanical module and a fluid module, wherein the mechanical module includes a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filling layer, an armor layer and an outer layer, and the fluid module includes an inner flow basin and an outer flow basin; configuring the initial submarine cable simulation model to obtain a final submarine cable simulation model; The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain a coupled submarine cable simulation model; and A simulation test is performed on the coupled submarine cable simulation model to obtain simulation results, and a submarine cable stress analysis is performed based on the simulation results.

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