Submarine cable stress analysis method and device, computer equipment and storage medium
Patent Information
- Application Number
- CN202311015368.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-11
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2043-08-11
AI Technical Summary
比如日常运行时，海底电缆可能会因洋流等影响而导致表层受到冲刷，使海底电缆裸露甚至悬空在海水中，悬跨的海底电缆受海水冲刷易产生涡激振动而导致机械疲劳，使海底电缆的机械和电气性能受到严重威胁
[0036]上述海底电缆应力分析方法、装置、计算机设备和存储介质，通过建立包括力学模块和流体模块的初始海底电缆模拟模型，并对初始海底电缆模拟模型进行配置，得到最终海底电缆模拟模型，将最终海底电缆模拟模型中的力学模块和流体模块进行耦合设置，得到耦合后的海底电缆模拟模型，对耦合后的海底电缆模拟模型进行仿真试验，基于仿真结果进行海底电缆应力分析。相比于传统技术中存在监测效果不佳的问题而言，本申请通过建立初始海底电缆模拟模型，初始海底电缆模拟模型包括流体模块，考虑到海水的影响，对海底电缆的状态监测更加全面，并对初始海底电缆模拟模型进行配置，且进行耦合设置，对耦合后的海底电缆模拟模型进行仿真试验，基于仿真结果进行海底电缆应力分析，通过仿真试验进行海底电缆应力分析，能够考虑海底电缆受力方面的影响，提高监测效果。
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Figure CN116956779B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of simulation technology, and in particular to a method, apparatus, computer equipment, and storage medium for stress analysis of submarine cables. Background Technology
[0002] In recent years, with the rapid development of offshore wind power, the number and length of submarine cables, as one of the important electrical equipment in offshore wind power projects, have increased dramatically year by year. Compared with terrestrial cables, submarine cables are located in harsher environments, and their safe operation is often affected by the natural environment and offshore operations. For example, during normal operation, submarine cables may be eroded by ocean currents, causing them to be exposed or even suspended in the seawater. Suspended submarine cables are prone to vortex-induced vibration caused by seawater erosion, leading to mechanical fatigue and seriously threatening the mechanical and electrical performance of submarine cables.
[0003] Currently, the monitoring of the operating status of submarine cables does not take into account the environmental impact of vortex-induced vibration. Monitoring is carried out only by deploying specific sensors, which leads to incomplete monitoring and poor monitoring results. Summary of the Invention
[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, and storage medium for submarine cable stress analysis that can improve monitoring effectiveness, in response to the aforementioned technical problems.
[0005] Firstly, this application provides a method for stress analysis of submarine cables. The method includes:
[0006] An initial submarine cable simulation model is established, which 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 sheath. The fluid module includes an inner flow domain and an outer flow domain.
[0007] The initial submarine cable simulation model is configured to obtain the final submarine cable simulation model;
[0008] The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain the coupled submarine cable simulation model.
[0009] A simulation experiment was conducted on the coupled submarine cable simulation model to obtain simulation results, and stress analysis of the submarine cable was performed based on the simulation results.
[0010] In one embodiment, configuring the initial submarine cable simulation model includes:
[0011] Material parameters are set for the initial submarine cable simulation model to obtain the submarine cable simulation model with the parameters set.
[0012] The submarine cable simulation model with the parameters set is divided into meshes according to a preset method to obtain the divided submarine cable simulation model.
[0013] Physical field boundary conditions are set for the divided submarine cable simulation model.
[0014] In one embodiment, setting the material parameters for the initial submarine cable simulation model includes:
[0015] The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set.
[0016] The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
[0017] In one embodiment, the step of meshing the submarine cable simulation model after parameter settings according to a preset method includes:
[0018] The fluid module in the submarine cable simulation model after the parameter settings are configured is meshed using a swept mesh generation method.
[0019] The mechanical modules in the submarine cable simulation model after the parameters are set are meshed using a mapped meshing method.
[0020] In one embodiment, the fluid module further includes an inlet, an outlet, and a boundary wall; the setting of physical field boundary conditions for the divided submarine cable simulation model includes:
[0021] Through the inlet, the outlet, and the boundary wall, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the divided submarine cable simulation model are set;
[0022] Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules.
[0023] In one embodiment, the simulation test on the coupled submarine cable simulation model to obtain simulation results includes:
[0024] Any part of the mechanical module in the coupled submarine cable simulation model is used as a torque structure layer;
[0025] A preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twisting pitch;
[0026] The sampling points are connected in a preset manner to obtain sampling line segments;
[0027] A simulation experiment was conducted on the coupled submarine cable simulation model, and the stress spatiotemporal distribution curve of the torsion structure layer was obtained based on the sampled line segment.
[0028] Secondly, this application also provides a submarine cable stress analysis device. The device includes:
[0029] The model building module is used to build an initial submarine cable simulation model. 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 sheath. The fluid module includes an inner flow domain and an outer flow domain.
[0030] The model configuration module is used to configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;
[0031] The coupling module is used to couple the mechanical module and the fluid module in the final submarine cable simulation model to obtain the coupled submarine cable simulation model.
[0032] The simulation test module is used to conduct simulation tests on the coupled submarine cable simulation model, obtain simulation results, and perform stress analysis on the submarine cable based on the simulation results.
[0033] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of any of the methods described above.
[0034] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of any of the methods described above.
[0035] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of any of the methods described above.
[0036] The aforementioned submarine cable stress analysis method, apparatus, computer equipment, and storage medium establish an initial submarine cable simulation model including mechanical and fluid modules, configure this initial model to obtain a final submarine cable simulation model, couple the mechanical and fluid modules within the final model to obtain a coupled submarine cable simulation model, conduct simulation experiments on the coupled model, and perform submarine cable stress analysis based on the simulation results. Compared to the problem of poor monitoring effect in traditional technologies, this application, by establishing an initial submarine cable simulation model including a fluid module to consider the influence of seawater, provides more comprehensive monitoring of the submarine cable's condition. Furthermore, by configuring and coupling the initial submarine cable simulation model, conducting simulation experiments on the coupled model, and performing submarine cable stress analysis based on the simulation results, this method of submarine cable stress analysis through simulation experiments can consider the stress effects on the submarine cable, thus improving the monitoring effect. Attached Figure Description
[0037] Figure 1 This is a flowchart illustrating the submarine cable stress analysis method provided in the embodiments of this application;
[0038] Figure 2 A schematic diagram of the mechanical module of an initial submarine cable simulation model provided in one embodiment;
[0039] Figure 3 A schematic diagram of a fluid module providing an initial submarine cable simulation model in one embodiment;
[0040] Figure 4 This is a flowchart illustrating the configuration of an initial submarine cable simulation model in one embodiment;
[0041] Figure 5 This is a schematic diagram of the mechanics module after meshing in one embodiment;
[0042] Figure 6 This is a flowchart illustrating the process of obtaining simulation results in one embodiment;
[0043] Figure 7 A schematic diagram of a sampling line segment is provided for one embodiment;
[0044] Figure 8 This is a schematic diagram of the spatiotemporal stress distribution curve of a torsion structure layer in one embodiment;
[0045] Figure 9 This is a schematic diagram of the vortex-induced vibration amplitude curve of a submarine cable provided in one embodiment;
[0046] Figure 10This is a schematic diagram of the stress distribution curves of each structural layer along the sampling line segment provided in one embodiment;
[0047] Figure 11 This is a structural block diagram of a submarine cable stress analysis device provided in the embodiments of this application;
[0048] Figure 12 This is an internal structural diagram of a computer device provided in an embodiment of this application. Detailed Implementation
[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0050] In this embodiment, a method for stress analysis of submarine cables is provided. This embodiment uses the application of this method to computer equipment as an example for illustration. It can be understood that this method can also be applied to servers, and can also be applied to systems including computer equipment and servers, and can be implemented through interaction between computer equipment and servers.
[0051] Figure 1 This is a flowchart illustrating the submarine cable stress analysis method provided in this application embodiment. The method is applied in a computer device. In one embodiment, such as... Figure 1 As shown, it includes the following steps:
[0052] S101. Establish an initial submarine cable simulation model, which 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 sheath. The fluid module includes an inner flow domain and an outer flow domain.
[0053] The initial submarine cable simulation model is constructed based on the structure and environment of an actual submarine cable. The mechanics module reflects the structure of the actual submarine cable, while the fluid module reflects the environment in which the actual submarine cable is located.
[0054] Specifically, the initial submarine cable simulation model is, for example, a YJQ41 type 110kV single-core XLPE insulated optical fiber composite submarine cable. A schematic diagram of the mechanical modules of an initial submarine cable simulation model is provided, such as... Figure 2 As shown. Figure 2 The mechanical module shown includes a copper conductor 1, an insulation layer 2, a lead alloy sheath 3, a high-density polyethylene (HDPE) sheath 4, a polyethylene terephthalate (PET) filler layer 5, an armor layer 6, and an outer sheath 7. A schematic diagram of the fluid module for an initial submarine cable simulation model is also provided, as shown below. Figure 3As shown. Figure 3 The fluid module shown includes an inner basin 8 and an outer basin 9. The inner basin is the seawater basin close to the submarine cable, and the outer basin is the seawater basin within a certain range outside the inner basin.
[0055] It should be understood that, Figure 2 and Figure 3 The mechanical and fluid modules of the initial submarine cable simulation model shown herein do not constitute a limitation on the mechanical and fluid modules of the initial submarine cable simulation model, and the corresponding components may be added or removed according to the actual situation.
[0056] S102, Configure the initial submarine cable simulation model to obtain the final submarine cable simulation model.
[0057] Here, the initial submarine cable simulation model is configured based on the material parameters of the actual submarine cable, the simulation test requirements, and the environment in which it is located. The resulting final submarine cable simulation model closely approximates the actual situation of the submarine cable.
[0058] S103, couple the mechanical module and fluid module in the final submarine cable simulation model to obtain the 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 coupled solver based on the condition that the submarine cable is under vortex-induced vibration.
[0060] The coupled submarine cable simulation model can transmit the force exerted by seawater on the submarine cable, as well as the displacement information of the submarine cable.
[0061] S104. Simulation tests are conducted on the coupled submarine cable simulation model to obtain simulation results, and stress analysis of the submarine cable is performed based on the simulation results.
[0062] In some embodiments, simulation experiments can be conducted by changing the configuration and coupling settings of the coupled submarine cable simulation model to obtain different simulation results.
[0063] The submarine cable stress analysis method provided in this embodiment establishes an initial submarine cable simulation model including a mechanical module and a fluid module, configures the initial submarine cable simulation model to obtain a final submarine cable simulation model, couples the mechanical module and the fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model, conducts simulation experiments on the coupled submarine cable simulation model, and performs submarine cable stress analysis based on the simulation results. Compared with the problem of poor monitoring effect in traditional technologies, this embodiment, by establishing an initial submarine cable simulation model including a fluid module, takes into account the influence of seawater, providing more comprehensive monitoring of the submarine cable's condition. Furthermore, by configuring and coupling the initial submarine cable simulation model, conducting simulation experiments on the coupled submarine cable simulation model, and performing submarine cable stress analysis based on the simulation results, this method can consider the stress influence on the submarine cable, thus improving the monitoring effect.
[0064] In one embodiment, a flowchart illustrating the configuration of an initial submarine cable simulation model is shown below. Figure 4 As shown, it includes the following:
[0065] S401, Set the material parameters for the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting.
[0066] Material parameters can be set manually in advance.
[0067] S402, the submarine cable simulation model with preset parameters is meshed according to the preset method to obtain the meshed submarine cable simulation model.
[0068] S403 sets the physical field boundary conditions for the divided submarine cable simulation model.
[0069] In this embodiment, the material parameter settings and physical field boundary condition settings can more closely resemble the actual situation of submarine cables, and the mesh generation can ensure the accuracy of the simulation results.
[0070] In one embodiment, setting material parameters for the initial submarine cable simulation model includes:
[0071] The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set.
[0072] The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
[0073] Here, we provide an example of setting the material parameters for the initial submarine cable simulation model, as shown in Table 1 below. Table 1:
[0074]
[0075] Seawater is used as the material for the fluid module.
[0076] 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.
[0077] In this embodiment, material parameters are set for the mechanical and fluid modules in the initial submarine cable simulation model, taking into account Poisson's ratio, elastic modulus, density, and dynamic viscosity. This comprehensive approach better reflects the submarine cable itself and its environment.
[0078] In one embodiment, the simulated submarine cable model with preset parameters is meshed according to a preset method, including:
[0079] The fluid module in the submarine cable simulation model after parameter settings was meshed using a swept meshing method.
[0080] The mechanical modules in the submarine cable simulation model after parameter settings are meshed using a mapped meshing method.
[0081] In some embodiments, meshing the fluid module in the simulated submarine cable model after parameter settings using a swept meshing method 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, please refer to... Figure 3 The diagram shown is a schematic of the gridded area.
[0082] In other embodiments, a mapped meshing method is used to mesh the mechanical modules in the submarine cable simulation model after parameter settings, including meshing the mechanical modules according to a hexahedral structure. Specifically, a schematic diagram of the meshed mechanical modules is shown below. Figure 5 As shown.
[0083] In this embodiment, the simulation model of the submarine cable after parameter settings is meshed according to a preset method, which can ensure the accuracy of the simulation results.
[0084] In one embodiment, the fluid module further includes an inlet, an outlet, and a boundary wall, such as Figure 3 In the diagram, 10 represents the inlet, 11 the outlet, and 12 the boundary wall; physical field boundary conditions are set for the partitioned submarine cable simulation model, including:
[0085] By setting 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;
[0086] Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules.
[0087] In some embodiments, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model are set so that the fluid type of the fluid module is turbulent.
[0088] In this embodiment, fixed supports are set at both ends of the mechanical module to simulate the suspended state of the submarine cable. By setting 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.
[0089] In one embodiment, a flowchart illustrating the process of conducting simulation experiments on a coupled submarine cable simulation model to obtain simulation results is shown below. Figure 6 As shown, it includes the following:
[0090] S601, any part of the mechanical module in the coupled submarine cable simulation model is used as a torque structure layer.
[0091] The torsion structure layer can be a copper conductor, an insulating layer, a lead alloy sheath, a high-density polyethylene sheath, a polyethylene terephthalate filler layer, an armor layer, or an outer sheath.
[0092] S602, a preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twist pitch.
[0093] In some embodiments, the preset straight sampling path is determined on the torsion structure layer by means of the direction of coastal water flow, and the preset straight sampling path is determined by a preset angle value of the cross section, wherein the preset angle value includes 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees.
[0094] S603 connects the sampling points using a preset method to obtain the sampling line segment.
[0095] The preset method can be a spiral extension method.
[0096] Here is a schematic diagram of a sampled line segment, such as... Figure 7 As shown. Figure 7 The points in the diagram are used as sampling points. The sampling points are connected by a spiral extension method to obtain the sampling line segment of the torsion structure layer.
[0097] S604, a simulation test was conducted on the coupled submarine cable simulation model, and the stress spatiotemporal distribution curve of the torsion structure layer was obtained based on the sampled line segment.
[0098] In some embodiments, a schematic diagram of the spatiotemporal stress distribution curve of a torsional structural layer is provided, such as... Figure 8 As shown, Figure 8 The coordinate axes represent stress value, axial distance, and time, respectively. The axial distance represents the vertical distance from a specific location on the submarine cable to the fixed end where the cable is installed, along the direction of the coastal water flow.
[0099] In this embodiment, by determining the sampling line segment of the torsional structure layer and extracting the stress data of the sampling points at different times, the spatiotemporal distribution of stress in the torsional structure layer can be obtained for use in submarine cable stress analysis, making submarine cable stress analysis simpler and more convenient.
[0100] In some embodiments, simulation experiments are conducted on the coupled submarine cable simulation model to obtain various simulation results, which are not limited to any particular type. Examples of simulation results include the vortex-induced vibration amplitude curve of the submarine cable and the stress distribution curves of each structural layer along the sampling segment.
[0101] The schematic diagram of the vortex-induced vibration amplitude curve of the submarine cable is shown below. Figure 9 As shown, Figure 9 The horizontal axis represents time, and the vertical axis represents the transverse amplitude. Figure 9 The dashed line represents the water flow velocity of 1.6 m / s, and the solid line represents the water flow velocity of 4.4 m / s. A schematic diagram of the stress distribution curves along the sampling line segment for each structural layer is shown below. Figure 10 As shown, Figure 10 The horizontal axis represents the axial distance, and the vertical axis represents the stress value. Figure 10 The figure shows the stress distribution curves of the polyethylene terephthalate filler layer, lead alloy sheath, and armor layer at the same moment. The axial distance is the direction of the coastal water flow, and the vertical distance from a certain position of the submarine cable to the fixed end where the cable is installed is shown.
[0102] In this embodiment, the operating status of submarine cables under vortex-induced vibration is monitored through simulation, and the stress distribution of the torsional structural layer is obtained, providing a theoretical basis for the operation, maintenance and condition monitoring of submarine cables.
[0103] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.
[0104] Based on the same inventive concept, this application also provides a submarine cable stress analysis device for implementing the submarine cable stress analysis method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more submarine cable stress analysis device embodiments provided below can be found in the limitations of the submarine cable stress analysis method described above, and will not be repeated here.
[0105] See Figure 11 , Figure 11 This is a structural block diagram of a submarine cable stress analysis device provided in an embodiment of this application. The device 1100 includes: a model building module 1101, a model configuration module 1102, a coupling module 1103, and a simulation test module 1104, wherein:
[0106] The model building module 1101 is used to build an initial submarine cable simulation model. 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 sheath. The fluid module includes an inner flow domain and an outer flow domain.
[0107] The model configuration module 1102 is used to configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;
[0108] Coupling module 1103 is used to couple the mechanical module and the fluid module in the final submarine cable simulation model to obtain the coupled submarine cable simulation model.
[0109] The simulation test module 1104 is used to conduct simulation tests on the coupled submarine cable simulation model, obtain simulation results, and perform stress analysis on the submarine cable based on the simulation results.
[0110] The submarine cable stress analysis device provided in this embodiment establishes an initial submarine cable simulation model including a mechanical module and a fluid module, configures the initial submarine cable simulation model to obtain a final submarine cable simulation model, and couples the mechanical module and fluid module in the final submarine cable simulation model to obtain a coupled submarine cable simulation model. Simulation experiments are conducted on the coupled submarine cable simulation model, and submarine cable stress analysis is performed based on the simulation results. Compared with the problem of poor monitoring effect in traditional technologies, this embodiment, by establishing an initial submarine cable simulation model including a fluid module, takes into account the influence of seawater, providing more comprehensive monitoring of the submarine cable's condition. Furthermore, by configuring and coupling the initial submarine cable simulation model, simulation experiments are conducted on the coupled submarine cable simulation model, and submarine cable stress analysis is performed based on the simulation results. This simulation-based submarine cable stress analysis considers the stress influence on the submarine cable, improving the monitoring effect.
[0111] Optionally, the model configuration module 1102 includes:
[0112] The parameter setting unit is used to set the material parameters of the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting.
[0113] Mesh generation unit is used to divide the submarine cable simulation model after parameter settings into meshes according to a preset method, so as to obtain the divided submarine cable simulation model.
[0114] The condition setting unit is used to set the physical field boundary conditions for the divided submarine cable simulation model.
[0115] Optionally, the parameter setting unit includes:
[0116] The mechanical module parameter setting subunit is used to set the Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model;
[0117] 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.
[0118] Optionally, the meshing units include:
[0119] The fluid module meshing sub-unit is used to mesh the fluid module in the submarine cable simulation model after parameter settings using a swept meshing method.
[0120] The mechanical module meshing sub-unit is used to mesh the mechanical module in the submarine cable simulation model after parameter settings using a mapped meshing method.
[0121] Optionally, the fluid module also includes an inlet, an outlet, and a boundary wall; the condition setting unit includes:
[0122] The fluid module condition setting sub-unit is used to set the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model through the inlet, outlet, and boundary wall;
[0123] The mechanical module condition setting sub-unit is used to set gravity for the mechanical modules in the divided submarine cable simulation model and to set fixed supports at both ends of the mechanical modules.
[0124] Optionally, the simulation test module 1104 includes:
[0125] Torque structure layer determination unit, used to take any part of the mechanical module in the coupled submarine cable simulation model as the torque structure layer;
[0126] The sampling point determination unit is used to determine a preset straight sampling path on the torsion structure layer and to determine sampling points on the preset straight sampling path based on the twisting pitch.
[0127] The sampling line segment acquisition unit is used to connect sampling points in a preset manner to obtain sampling line segments;
[0128] The simulation test unit is used to conduct simulation tests on the coupled submarine cable simulation model and obtain the stress spatiotemporal distribution curve of the torsion structure layer based on the sampled line segments.
[0129] Each module in the aforementioned submarine cable stress analysis device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the corresponding operations of each module.
[0130] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 12As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for stress analysis of submarine cables. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.
[0131] Those skilled in the art will understand that Figure 12 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0132] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the submarine cable stress analysis method provided in the above embodiment:
[0133] An initial submarine cable simulation model was established, which included a mechanical module and a fluid module. The mechanical module included 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 sheath. The fluid module included an inner flow domain and an outer flow domain.
[0134] Configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;
[0135] The mechanical and fluid modules in the final submarine cable simulation model are coupled to obtain the coupled submarine cable simulation model.
[0136] Simulation tests were conducted on the coupled submarine cable simulation model to obtain simulation results, and stress analysis of the submarine cable was performed based on the simulation results.
[0137] In one embodiment, the processor, when executing a computer program, also performs the following steps:
[0138] Material parameters are set for the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting.
[0139] The submarine cable simulation model with preset parameters is meshed according to the preset method to obtain the meshed submarine cable simulation model.
[0140] Physical field boundary conditions are set for the divided submarine cable simulation model.
[0141] In one embodiment, the processor, when executing a computer program, also performs the following steps:
[0142] The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set.
[0143] The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
[0144] In one embodiment, the processor, when executing a computer program, also performs the following steps:
[0145] The fluid module in the submarine cable simulation model after parameter settings was meshed using a swept meshing method.
[0146] The mechanical modules in the submarine cable simulation model after parameter settings are meshed using a mapped meshing method.
[0147] In one embodiment, the processor, when executing a computer program, also performs the following steps:
[0148] The fluid module also includes an inlet, an outlet, and a boundary wall; through the inlet, outlet, and boundary wall, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model are set;
[0149] Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules.
[0150] In one embodiment, the processor, when executing a computer program, also performs the following steps:
[0151] Any part of the mechanical module in the coupled submarine cable simulation model is used as a torque structure layer.
[0152] A preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twisting pitch;
[0153] By connecting the sampling points in a preset manner, sampling line segments are obtained;
[0154] Simulation experiments were conducted on the coupled submarine cable simulation model, and the spatiotemporal stress distribution curve of the torsional structural layer was obtained based on the sampled line segments.
[0155] The implementation principle and technical effects of the above embodiments are similar to those of the above method embodiments, and will not be repeated here.
[0156] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the submarine cable stress analysis method provided in the above embodiment:
[0157] An initial submarine cable simulation model was established, which included a mechanical module and a fluid module. The mechanical module included 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 sheath. The fluid module included an inner flow domain and an outer flow domain.
[0158] Configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;
[0159] The mechanical and fluid modules in the final submarine cable simulation model are coupled to obtain the coupled submarine cable simulation model.
[0160] Simulation tests were conducted on the coupled submarine cable simulation model to obtain simulation results, and stress analysis of the submarine cable was performed based on the simulation results.
[0161] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0162] Material parameters are set for the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting.
[0163] The submarine cable simulation model with preset parameters is meshed according to the preset method to obtain the meshed submarine cable simulation model.
[0164] Physical field boundary conditions are set for the divided submarine cable simulation model.
[0165] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0166] The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set.
[0167] The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
[0168] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0169] The fluid module in the submarine cable simulation model after parameter settings was meshed using a swept meshing method.
[0170] The mechanical modules in the submarine cable simulation model after parameter settings are meshed using a mapped meshing method.
[0171] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0172] The fluid module also includes an inlet, an outlet, and a boundary wall; through the inlet, outlet, and boundary wall, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model are set;
[0173] Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules.
[0174] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0175] Any part of the mechanical module in the coupled submarine cable simulation model is used as a torque structure layer.
[0176] A preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twisting pitch;
[0177] By connecting the sampling points in a preset manner, sampling line segments are obtained;
[0178] Simulation experiments were conducted on the coupled submarine cable simulation model, and the spatiotemporal stress distribution curve of the torsional structural layer was obtained based on the sampled line segments.
[0179] The implementation principle and technical effects of the above embodiments are similar to those of the above method embodiments, and will not be repeated here.
[0180] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the submarine cable stress analysis method provided in the above embodiment:
[0181] An initial submarine cable simulation model was established, which included a mechanical module and a fluid module. The mechanical module included 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 sheath. The fluid module included an inner flow domain and an outer flow domain.
[0182] Configure the initial submarine cable simulation model to obtain the final submarine cable simulation model;
[0183] The mechanical and fluid modules in the final submarine cable simulation model are coupled to obtain the coupled submarine cable simulation model.
[0184] Simulation tests were conducted on the coupled submarine cable simulation model to obtain simulation results, and stress analysis of the submarine cable was performed based on the simulation results.
[0185] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0186] Material parameters are set for the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting.
[0187] The submarine cable simulation model with preset parameters is meshed according to the preset method to obtain the meshed submarine cable simulation model.
[0188] Physical field boundary conditions are set for the divided submarine cable simulation model.
[0189] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0190] The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set.
[0191] The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
[0192] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0193] The fluid module in the submarine cable simulation model after parameter settings was meshed using a swept meshing method.
[0194] The mechanical modules in the submarine cable simulation model after parameter settings are meshed using a mapped meshing method.
[0195] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0196] The fluid module also includes an inlet, an outlet, and a boundary wall; through the inlet, outlet, and boundary wall, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model are set;
[0197] Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules.
[0198] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:
[0199] Any part of the mechanical module in the coupled submarine cable simulation model is used as a torque structure layer.
[0200] A preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twisting pitch;
[0201] By connecting the sampling points in a preset manner, sampling line segments are obtained;
[0202] Simulation experiments were conducted on the coupled submarine cable simulation model, and the spatiotemporal stress distribution curve of the torsional structural layer was obtained based on the sampled line segments.
[0203] The implementation principle and technical effects of the above embodiments are similar to those of the above method embodiments, and will not be repeated here.
[0204] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can 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 can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0205] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.
[0206] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. A method for stress analysis of submarine cables, characterized in that, The method includes: An initial submarine cable simulation model is established, comprising 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 sheath. The fluid module includes an inner flow domain and an outer flow domain; the fluid module also includes an inlet, an outlet, and a boundary wall. Material parameters are set for the initial submarine cable simulation model to obtain the submarine cable simulation model with the parameters set. The submarine cable simulation model with the parameters set is divided into meshes according to a preset method to obtain the divided submarine cable simulation model. Through the inlet, the outlet, and the boundary wall, the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the divided submarine cable simulation model are set; Gravity is applied to the mechanical modules in the divided submarine cable simulation model, and fixed supports are installed at both ends of the mechanical modules to obtain the final submarine cable simulation model. The mechanical module and the fluid module in the final submarine cable simulation model are coupled to obtain the coupled submarine cable simulation model. Any part of the mechanical module in the coupled submarine cable simulation model is taken as a torsion structure layer; A preset straight sampling path is determined on the torsion structure layer, and sampling points are determined on the preset straight sampling path based on the twisting pitch; the preset straight sampling path is determined on the torsion structure layer by the direction of coastal water flow, and the preset straight sampling path is determined by a preset angle value of the cross section, wherein the preset angle value includes 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees; The sampling points are connected by a spiral extension method to obtain the sampling line segment of the torsion structure layer; A simulation test was conducted on the coupled submarine cable simulation model. The stress spatiotemporal distribution curve of the torsion structure layer was obtained based on the sampling line segment to obtain the simulation results. The coordinate axes of the stress spatiotemporal distribution curve of the torsion structure layer are stress value, axial distance and time, respectively. The axial distance is the direction of the coastal water flow and the vertical distance from a certain position of the submarine cable to the fixed end of the cable. Stress analysis of submarine cables was performed based on the simulation results.
2. The method according to claim 1, characterized in that, The process of setting material parameters for the initial submarine cable simulation model includes: The Poisson's ratio, elastic modulus, and density of the materials used in each component of the mechanical module in the initial submarine cable simulation model are set. The density and dynamic viscosity of the fluid module in the initial submarine cable simulation model are set.
3. The method according to claim 1, characterized in that, The step of meshing the submarine cable simulation model after setting the parameters according to a preset method includes: The fluid module in the submarine cable simulation model after the parameter settings are configured is meshed using a swept mesh generation method. The mechanical modules in the submarine cable simulation model after the parameters are set are meshed using a mapped meshing method.
4. A stress analysis device for submarine cables, characterized in that, The device includes: The model building module is used to build an initial submarine cable simulation model. 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 sheath. The fluid module includes an inner flow domain and an outer flow domain. A model configuration module is used to configure the initial submarine cable simulation model to obtain the final submarine cable simulation model; the model configuration module includes: The parameter setting unit is used to set the material parameters of the initial submarine cable simulation model to obtain the submarine cable simulation model after parameter setting. Mesh generation unit is used to divide the submarine cable simulation model after parameter settings into meshes according to a preset method, so as to obtain the divided submarine cable simulation model. The condition setting unit is used to set the physical field boundary conditions for the divided submarine cable simulation model; the condition setting unit includes: The fluid module condition setting sub-unit is used to set the water flow velocity, fluid gravity, and fluid buoyancy in the fluid module of the partitioned submarine cable simulation model through the inlet, outlet, and boundary wall; The mechanical module condition setting sub-unit is used to set gravity for the mechanical modules in the divided submarine cable simulation model and to set fixed supports at both ends of the mechanical modules. The coupling module is used to couple the mechanical module and the fluid module in the final submarine cable simulation model to obtain the coupled submarine cable simulation model. The simulation test module is used to conduct simulation tests on the coupled submarine cable simulation model, obtain simulation results, and perform stress analysis on the submarine cable based on the simulation results; the simulation test module includes: A torsion structure layer determining unit is used to take any part of the mechanical module in the coupled submarine cable simulation model as the torsion structure layer; The sampling point determination unit is used to determine a preset straight sampling path on the torsion structure layer, and to determine sampling points on the preset straight sampling path based on the twisting pitch; the preset straight sampling path on the torsion structure layer is determined by the direction of coastal water flow, and the preset straight sampling path is determined by a preset angle value of the cross section, wherein the preset angle value includes 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees; The sampling line segment acquisition unit connects the sampling points in a spiral extension manner to obtain the sampling line segments of the torsion structure layer; The simulation test unit is used to conduct simulation tests on the coupled submarine cable simulation model. Based on the sampling line segment, the stress spatiotemporal distribution curve of the torsion structure layer is obtained. The coordinate axes of the stress spatiotemporal distribution curve of the torsion structure layer are stress value, axial distance and time, respectively. The axial distance is the direction of the coastal water flow and the vertical distance from a certain position of the submarine cable to the fixed end of the cable.
5. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 3.
6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.
7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.