Force measurement method, device and equipment of ground coil model and storage medium

Abstract

The application discloses a force measurement method and device of a ground coil model, equipment and a storage medium. The method comprises the following steps: acquiring design parameters of a ground coil, wherein the design parameters comprise structure parameters and preparation materials; determining a ground coil model according to the structure parameters and the preparation materials; building a finite element simulation model of a superconducting high-speed magnetic suspension linear motor based on the ground coil model; generating a force waveform diagram of the ground coil model based on the finite element simulation model of the linear motor; applying electromagnetic force contained in the force waveform diagram to the ground coil model, and measuring force conditions of the ground coil model under normal working conditions and force conditions of the ground coil model under deterioration factor conditions respectively. The method can improve the accuracy of simulation analysis results of force conditions of the ground coil under various working conditions.

Description

Technical Field

[0001] This application relates to the field of superconducting high-speed magnetic levitation technology, and more specifically, to a method, apparatus, equipment, and storage medium for measuring the force on a ground coil model. Background Technology

[0002] With the advancement of technology and the rapid development of the transportation industry, superconducting electric levitation (EDS) technology has become increasingly mature, especially superconducting high-speed magnetic levitation technology, which has gradually transitioned from theory to practice. Maglev trains are driven using the principle of linear synchronous motors. A linear motor consists of a long stator winding (also called a long stator coil or ground coil) and an onboard mover coil. The ground coil provides the levitation, guiding, and driving magnetic field to complete the driving, levitation, and guidance of the train.

[0003] The primary function of the ground coils is to generate propulsion, levitation, and guidance forces through the electromagnetic force they interact with the superconducting magnets on the train. The entire superconducting high-speed maglev railway is equipped with ground coils, which are numerous and operate outdoors for extended periods. Therefore, the ground coils are required to possess high reliability and durability.

[0004] In the transition from theory to engineering, it is necessary to conduct simulation analysis of the ground coils under actual engineering conditions and scenarios, especially the installation method, fatigue characteristics, and durability of the ground coils. For superconducting high-speed magnetic levitation systems, the entire vehicle's drive, levitation, and guidance rely entirely on electromagnetic forces, requiring high stability of the magnetic field. Furthermore, the number of ground coils is enormous. Therefore, it is necessary to build a dynamic simulation model that can accurately analyze the stress conditions of the ground coils under various operating conditions.

[0005] However, the dynamic simulation models of ground coils in superconducting high-speed magnetic levitation systems built in traditional technologies still suffer from inaccurate simulation analysis results because the design parameters of the ground coils differ from the design parameters of the ground coils under actual engineering conditions and scenarios. Summary of the Invention

[0006] To address at least one deficiency or improvement need in the prior art, the present invention provides a method, apparatus, device, and storage medium for measuring the force on a ground coil model, which can improve the accuracy of simulation analysis results of the force on the ground coil under various working conditions.

[0007] To achieve the above objectives, according to a first aspect of the present invention, a method for measuring the force on a ground coil model is provided, the method comprising:

[0008] Obtain the design parameters of the ground coil, including structural parameters and fabrication materials;

[0009] The ground coil model was determined based on the structural parameters and the materials used in its fabrication.

[0010] A finite element simulation model of a superconducting high-speed magnetic levitation linear motor was built based on a ground coil model.

[0011] Based on the finite element simulation model of the linear motor, the force waveform diagram of the ground coil model is generated.

[0012] The electromagnetic force contained in the force waveform diagram is applied to the ground coil model, and the force conditions of the ground coil model under normal working conditions and under deterioration conditions are measured respectively.

[0013] Furthermore, the design parameters include electrical parameters. Based on the ground coil model, a finite element simulation model of the superconducting high-speed magnetic levitation linear motor is built, including determining the stator electrical circuit based on the ground coil model; forming stator units according to the electrical parameters and stator electrical circuit; building a stator finite element simulation model with a pre-set stator scale according to the stator units; and building a finite element simulation model of the superconducting high-speed magnetic levitation linear motor through the stator finite element simulation model.

[0014] Furthermore, based on the stator elements, a stator finite element simulation model with a preset stator scale is constructed, including linear array stator elements.

[0015] Furthermore, based on the finite element simulation model of the linear motor, a force waveform diagram of the ground coil model is generated. This includes simulating the driving state of the maglev train at different speed levels using the finite element simulation model of the linear motor, obtaining the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period. The electromagnetic force on the ground coil model includes the electromagnetic force in each direction at each position of the ground coil model. Based on the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period, a force waveform diagram of the ground coil model is generated.

[0016] Furthermore, the ground coil model is bolted to the sidewall of the track. Electromagnetic forces contained in the force waveform diagram are applied to the ground coil model. The force conditions of the ground coil model under normal operating conditions and under deterioration conditions are measured respectively. This includes applying the electromagnetic forces contained in the force waveform diagram to the ground coil model under normal operating conditions and measuring the first force condition at the bolt fixing position; applying the electromagnetic forces contained in the force waveform diagram to the ground coil model under deterioration conditions and measuring the second force condition at the bolt fixing position; and evaluating the degree of influence of the deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil model based on the first and second force conditions.

[0017] Furthermore, the degradation factors include temperature change conditions. The electromagnetic force contained in the force waveform diagram is applied to the ground coil model under degradation factors, and the second stress condition of the bolt fixing position is measured. The second stress condition includes thermal stress caused by instantaneous overcurrent temperature difference.

[0018] Furthermore, the degradation factors include coil surface accuracy variation conditions. The electromagnetic force contained in the force waveform diagram is applied to the ground coil model under degradation factors conditions, and the second stress condition of the bolt fixing position is measured. The second stress condition includes the connection stress caused by uneven coil mounting surface.

[0019] According to a second aspect of the invention, a force measurement device for a ground coil model is also provided, the device comprising:

[0020] The acquisition module is configured to acquire the design parameters of the ground coil, including structural parameters and fabrication materials.

[0021] The determination module is configured to determine the ground coil model based on structural parameters and fabrication materials;

[0022] The module is configured to build a finite element simulation model of a superconducting high-speed magnetic levitation linear motor based on a ground coil model.

[0023] The generation module is configured to generate a force waveform diagram of the ground coil model based on the finite element simulation model of the linear motor.

[0024] The measurement module is configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model, and to measure the force on the ground coil model under normal operating conditions and under deterioration conditions.

[0025] According to a third aspect of the invention, a force measurement device for a ground coil model is also provided, comprising at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program that, when executed by the processing unit, causes the processing unit to perform the steps of any of the above methods.

[0026] According to a fourth aspect of the invention, a storage medium is also provided, which stores a computer program executable by a force measurement device of a ground coil model, which, when run on the force measurement device of the ground coil model, causes the force measurement device of the ground coil model to perform the steps of any of the above methods.

[0027] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0028] (1) The method for measuring the force on the ground coil model provided by the present invention is to select the design parameters of the ground coil that are close to the actual working conditions, build a finite element simulation model of the superconducting electric levitation linear motor, generate a force waveform diagram of the ground coil model based on the finite element simulation model of the superconducting electric levitation linear motor, and then apply the electromagnetic force contained in the force waveform diagram to the ground coil model, so as to measure the force on the ground coil model under normal working conditions and deterioration factors, thereby achieving the purpose of improving the accuracy of the simulation analysis results of the force on the ground coil under various working conditions.

[0029] (2) The force measurement method of the ground coil model provided by the present invention can provide guidance and basis for the processing and manufacturing of components of superconducting high-speed magnetic levitation long stator traction network.

[0030] (3) The stress measurement method of the ground coil model provided by the present invention can measure the stress of the ground coil model under the conditions of high conductor temperature and uneven coil mounting surface.

[0031] (4) By using the stress measurement method of the ground coil model provided by the present invention, after obtaining accurate simulation analysis results of the stress of the ground coil under various working conditions, it is also possible to evaluate the degree of influence of the deterioration factors on at least one of the mechanical strength, fatigue characteristics or durability of the ground coil based on the simulation analysis results, so as to provide guidance for construction process management and product equipment manufacturing. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A flowchart illustrating a force measurement method for a ground coil model provided in one embodiment;

[0034] Figure 2A A schematic diagram of the structure of the superconducting magnet of a superconducting high-speed magnetic levitation linear motor provided in one embodiment;

[0035] Figure 2B A schematic diagram of the structure of the LG coil of a superconducting high-speed magnetic levitation linear motor provided in one embodiment;

[0036] Figure 2C A schematic diagram of the structure of the P coil of a superconducting high-speed magnetic levitation linear motor provided in one embodiment;

[0037] Figure 2D A schematic diagram showing the relative positions of the components of a superconducting high-speed magnetic levitation linear motor provided in one embodiment;

[0038] Figure 3 Front and side views of a single PLG coil product provided for one embodiment;

[0039] Figure 4 A flowchart illustrating a force measurement method for a ground coil model provided in another embodiment;

[0040] Figure 5 A schematic diagram of the force measurement device for a ground coil model provided in one embodiment;

[0041] Figure 6 A schematic diagram of the force measurement device for a ground coil model provided in one embodiment. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0043] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0044] like Figure 1 As shown, a method for measuring the force on a ground coil model is provided. This method can be executed by a terminal, which can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. Taking the application of this method to a terminal as an example, the method includes the following steps:

[0045] Step 101: Obtain the design parameters of the ground coil, including structural parameters and fabrication materials;

[0046] Step 102: Determine the ground coil model based on the structural parameters and fabrication materials;

[0047] Step 103: Based on the ground coil model, build a finite element simulation model of the superconducting high-speed magnetic levitation linear motor;

[0048] Step 104: Based on the finite element simulation model of the linear motor, generate the force waveform diagram of the ground coil model;

[0049] Step 105: Apply the electromagnetic force contained in the force waveform diagram to the ground coil model, and measure the force on the ground coil model under normal working conditions and under deterioration conditions.

[0050] In this system, the ground coil is the long stator winding that constitutes the linear motor in the superconducting high-speed magnetic levitation system. The ground coil can be a propulsion-levitation-guidance (PLG) coil, which consists of a propulsion coil (P coil) and a levitation-guidance coil (LG coil) installed simultaneously on the sidewall of the track.

[0051] The superconducting high-speed magnetic levitation linear motor consists of ground coils mounted on the inner wall of the track and superconducting magnets (or superconducting magnets) installed inside the train frame. The working principle of the superconducting high-speed magnetic levitation linear motor is that the stator can only provide sufficient levitation force for the vehicle when the train speed reaches the set speed.

[0052] For example, step 101 includes obtaining the design parameters of the ground coil after determining the electrical and structural parameters of the superconducting magnet of the superconducting high-speed magnetic levitation linear motor. The design parameters of the ground coil include electrical parameters, structural parameters, and fabrication materials.

[0053] The electrical parameters of a superconducting magnet include the dynamic superconducting current flowing through it, and the mover superconducting current, which is the current flowing within the superconducting magnet in a cryogenic environment (in the absence of resistance).

[0054] The electrical parameters of a PLG coil include operating voltage, operating current, and operating frequency.

[0055] Figure 2A This is a schematic diagram of the superconducting magnet structure of the superconducting high-speed magnetic levitation linear motor provided in an embodiment of this application. The number of superconducting magnets can include at least two. For example, in the case of eight superconducting magnets, four superconducting magnets can be arranged on each side of the carriage near the front of the vehicle, and four superconducting magnets can be arranged on each side of the carriage near the rear of the vehicle. Figure 2A As shown, the two superconducting magnets are installed adjacent to each other. The structural parameters of the superconducting magnets include: a center-to-center distance of 1350 mm between the two adjacent superconducting magnets; a length of 1112 mm and a width of 542 mm for each superconducting magnet; a cross-sectional dimension of 42 mm * 40 mm; and 2800 coil turns. The driving superconducting current flowing through each superconducting magnet is 250 A.

[0056] Figure 2B This is a schematic diagram of the LG coil structure of a superconducting high-speed magnetic levitation linear motor provided in an embodiment of this application. The number of LG coils may include at least two, and these two LG coils are arranged vertically to form a figure-eight structure. Figure 2B As shown, the four LG coils are installed in adjacent left and right and adjacent top and bottom positions. The structural parameters of the LG coils include: the total width of the two adjacent LG coils is 810mm, the length of each LG coil is 400mm, the width is 390mm, the cross-sectional dimensions are 50mm*51mm, and the number of coil turns is 36.

[0057] Figure 2C This is a schematic diagram of the structure of the P-coil of a superconducting high-speed magnetic levitation linear motor provided in an embodiment of this application. The number of P-coils may include at least two, and the number of P-coils and LG-coils is in a preset ratio. For example... Figure 2C As shown, the structural parameters of the P coil include: each P coil is 800mm long, 645mm wide, has a cross-sectional dimension of 45mm*40mm, and has 18 turns.

[0058] Figure 2DThis is a schematic diagram showing the relative positions of the components of the superconducting high-speed magnetic levitation linear motor provided in an embodiment of this application. Figure 2D As shown, the three components in the top row are driven by a three-phase current source, such as... Figure 2C The P coil shown has six components in the middle row as follows: Figure 2B The LG coils shown are arranged side-by-side, with the two components in the bottom row as follows: Figure 2A The superconducting magnets shown are adjacent to each other in the installation position. The distance between the P coil and the LG coil is 72 mm, and the distance between the LG coil and the superconducting magnet is 185 mm.

[0059] Table 1 is a list of materials used in the fabrication of each component of the superconducting high-speed magnetic levitation linear motor provided in this embodiment.

[0060] Table 1

[0061]

[0062] As shown in Table 1, the ground coil is made of aluminum. The superconducting magnet is made of REBCO (Rare Earth Barium Copper Oxide) tape.

[0063] A ground coil model is a simulation model of a single ground coil built using simulation software installed on a terminal, based on the ground coil's structural parameters and manufacturing materials. A ground coil model can be as follows: Figure 3 The single PLG coil product shown.

[0064] Figure 3 Front and side views of a single PLG coil product. (Example) Figure 3 As shown, the PLG coil product includes an upper coil and a lower coil, with the lower coil located directly below the upper coil. The structural parameters of the PLG coil product include: outer contour dimensions of 880mm * 832mm * 70mm, and a center distance of 755mm. The center distance corresponds to the length of the P coil. Because the PLG coil product requires resin encapsulation, the center distance is smaller than the length in the outer contour dimensions.

[0065] The finite element simulation model of the superconducting high-speed magnetic levitation linear motor includes a stator finite element simulation model with a preset rotor size and a mover finite element simulation model with a preset mover size. The stator finite element simulation model with the preset rotor size is determined based on the ground coil model.

[0066] In one embodiment, step 103 includes determining the stator electrical circuit based on the ground coil model; forming stator units according to the electrical parameters and the stator electrical circuit; building a stator finite element simulation model with a predetermined stator scale according to the stator units; and building a finite element simulation model of the superconducting electric levitation linear motor through the stator finite element simulation model.

[0067] like Figure 3 As shown, the PLG coil product also includes a cable interface located below the lower coil for connection to a three-phase current source and other PLG coil products. The stator electrical circuit includes a three-phase current source and at least one ground coil model. The connection method between the at least one ground coil model can be determined according to simulation requirements, and this embodiment does not limit this.

[0068] The stator unit is the stator electrical circuit in operation under ideal conditions. The stator finite element simulation model is a simulation model established by performing finite element simulation analysis on the stator unit.

[0069] For example, after building the ground coil model, the terminal draws the stator electrical circuit and applies current to the stator electrical circuit to form a stator unit; the stator units are linearly arrayed to build a stator finite element simulation model with a preset stator size.

[0070] Linear arrays are a common operation in simulation software. The direction and number of linear arrays can be determined according to simulation requirements. For example, the direction of a linear array can be along a horizontal straight line or a vertical straight line, and the number of linear arrays can be two or more. This embodiment does not limit this. The preset subscale is the number of linear arrays, which is predetermined according to simulation requirements.

[0071] On the other hand, before or after building a stator finite element simulation model with a preset stator size, the terminal also builds a superconducting mover coil model based on the electrical and structural parameters of the superconducting magnet; applies a mover superconducting current to the superconducting mover coil model to form a mover element; and linearly arrays the mover elements to build a mover finite element simulation model with a preset mover size.

[0072] The superconducting mover coil model is a simulation model of a single superconducting magnet built using simulation software installed on the terminal, based on the structural parameters and materials of the superconducting magnet. The mover element is the superconducting mover coil in an ideal working state. The mover finite element simulation model is a simulation model established by performing finite element simulation analysis on the mover element.

[0073] The force waveform diagram of the ground coil model reflects the electromagnetic forces in various directions experienced by different locations of the ground coil model at different times when the maglev train is traveling at different speed levels. Because... Figure 3The PLG coil product shown includes an upper coil and a lower coil. During the operation of the maglev train, the electromagnetic forces experienced by different positions of the upper and lower coils at the same time are different, and the electromagnetic forces experienced by the same position of the PLG coil product at different times are also different. In addition, since the ground coil generates propulsion, levitation, and guiding forces through the electromagnetic force generated by the interaction between the ground coil and the superconducting magnets on the maglev train, the same position of the PLG coil product at the same time during the operation of the maglev train will experience forces in different directions, including at least propulsion (along the direction of train travel), levitation (along the direction perpendicular to the track sidewall), and guiding force (along the lateral direction perpendicular to the direction of train travel in the plane where the track sidewall is located).

[0074] In one embodiment, step 104 includes simulating the driving state of a maglev train at different speed levels using a finite element simulation model of a linear motor, obtaining the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period, wherein the electromagnetic force on the ground coil model includes the electromagnetic force in each direction at each position of the ground coil model; and generating a force waveform diagram of the ground coil model based on the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period.

[0075] In one embodiment, the ground coil model is bolted to the track sidewall. Step 105 includes applying the electromagnetic force contained in the force waveform diagram to the ground coil model under normal operating conditions and measuring the first force condition at the bolt fixing position; applying the electromagnetic force contained in the force waveform diagram to the ground coil model under deterioration conditions and measuring the second force condition at the bolt fixing position; and evaluating the degree of influence of the deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil model based on the first and second force conditions.

[0076] The ground coil can be installed on the track sidewall using bolts. For example... Figure 3 As shown, a single PLG coil contains four bolt fixing positions: two symmetrical bolt fixing positions on the upper coil and two symmetrical bolt fixing positions on the lower coil. Furthermore, the two bolt fixing positions on the upper coil and the two bolt fixing positions on the lower coil are also symmetrically arranged. Bolts pass through these fixing positions in the ground coil model, fixing the ground coil model to the inner wall of the track. Measuring the force on these bolt fixing positions reflects the stress on the ground coil model.

[0077] The first stress condition is the stress condition of the bolt fixing position under normal working conditions, and the second stress condition is the stress condition of the bolt fixing position under deterioration factors.

[0078] Degradation factors are various factors that cause malfunctions in maglev trains, specifically the ground coils. The ground coils are outdoor electrical devices, and the resin coating of these structural components requires not only electrical performance but also mechanical durability. Prolonged exposure to various outdoor environments causes the resin polymer materials to degrade, with degradation factors including water absorption, ultraviolet radiation, and heat. Table 2 shows the correspondence between degradation factors and stress.

[0079] Table 2

[0080]

[0081] As shown in Table 2, normal operating conditions include the electromagnetic force applied to the ground coil, the conductor temperature of the ground coil, the ambient temperature of the ground coil, the accuracy of the connection surface between the ground coil and the inner wall of the track, and the connection axial force, etc., when the maglev train is operating normally.

[0082] In the aforementioned method for measuring the stress on the ground coil model, design parameters close to actual working conditions are selected for the ground coil. A finite element simulation model of a superconducting electric levitation linear motor is then built. Based on this model, a stress waveform diagram of the ground coil model is generated. Then, the electromagnetic force contained in the waveform diagram is applied to the ground coil model, allowing for the measurement of the stress under normal operating conditions and deterioration factors. This improves the accuracy of simulation analysis results for the stress on the ground coil under various working conditions and provides guidance and a basis for the manufacturing of components for superconducting high-speed magnetic levitation long stator traction networks. Furthermore, after obtaining accurate simulation analysis results of the ground coil's stress under various working conditions, the impact of deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil can be evaluated based on the simulation analysis results, providing guidance for construction process management and product equipment manufacturing.

[0083] In one embodiment, the degradation factor conditions include temperature change conditions. Applying the electromagnetic force contained in the force waveform diagram to the ground coil model under degradation factor conditions and measuring the second stress condition of the bolt fixing position includes applying the electromagnetic force contained in the force waveform diagram to the ground coil model under temperature change conditions and measuring the second stress condition of the bolt fixing position, the second stress condition including thermal stress caused by instantaneous overcurrent temperature difference.

[0084] The temperature change conditions include heating the ground coil model, for example, by 30°C, to simulate the working conditions when the conductor temperature is high.

[0085] In one embodiment, the degradation factor conditions include coil surface accuracy variation conditions. Applying the electromagnetic force contained in the force waveform diagram to the ground coil model under degradation factor conditions, and measuring the second stress condition at the bolt fixing position, includes applying the electromagnetic force contained in the force waveform diagram to the ground coil model under coil surface accuracy variation conditions, and measuring the second stress condition at the bolt fixing position, the second stress condition including connection stress caused by unevenness of the coil mounting surface.

[0086] Among them, the coil surface accuracy variation conditions include setting the connection surface between the ground coil and the inner wall of the track (also known as the coil mounting surface) as a broken slope to simulate the working condition when the coil mounting surface is uneven.

[0087] In one embodiment, such as Figure 4 As shown, a method for measuring the force on a ground coil model is provided.

[0088] Step 1: Based on the design parameters of the superconducting magnet in the superconducting high-speed magnetic levitation system, construct a finite element simulation model of the mover under ideal conditions of a certain scale (i.e., Figure 4 (The moving part model in the text). The design parameters of the superconducting magnet include electrical parameters, structural parameters, and fabrication materials.

[0089] Step 1.1 Draw the superconducting mover coil to form the electromagnetic dimension profile.

[0090] Step 1.2 Apply a superconducting current to the mover to form a mover unit under ideal conditions.

[0091] Step 1.3 Based on the actual situation of the vehicle, linear array the moving sub-elements to form a finite element simulation model of the moving sub-elements under ideal conditions of a certain scale.

[0092] Among them, the linear array of moving sub-units can be determined according to the actual situation of the vehicle, such as the distance between the front of the train and the moving sub-unit, the number of linear arrays and the number of groups. For example, the distance between the front of the train and the first moving sub-unit is set to 5 meters. After linear arraying the moving sub-units, a total of 16 moving sub-units are obtained, including 8 on each side of the train. These 8 moving sub-units are divided into two groups, one group is close to the front of the train and the other group is close to the rear of the train.

[0093] Step 2: Based on the design parameters of the ground coil in the superconducting high-speed magnetic levitation system, construct a stator finite element simulation model of a certain scale under ideal conditions (i.e., Figure 4 (Stator model in the text).

[0094] Step 2.1 Draw the basic outline of the long stator module to form the basic electromagnetic dimension outline. Based on the basic electromagnetic dimension outline, draw the long stator module (i.e., the ground coil model mentioned above) according to the design parameters of the ground coil.

[0095] Step 2.2 Draw the electrical circuit of the long stator, apply current, and form a long stator unit under ideal conditions.

[0096] Step 2.3 Linear array stator elements to form a stator finite element simulation model under ideal conditions of a certain scale.

[0097] Step 3: Based on the electromagnetic finite element simulation results, obtain the electromagnetic force on the long stator coil in each direction at different speed levels, and obtain the electromagnetic force waveform based on the electromagnetic force.

[0098] Step 4: Apply the electromagnetic force waveform diagram to the long stator coil and measure the stress at the bolt fixing point under normal conditions. Fix the long stator coil to the inner wall of the track with a specified axial force, heat the long stator coil by 30°C, and calculate the thermal stress at the bolt fixing point. Set a slope on the coil mounting surface of the inner wall of the track to simulate an uneven surface, connect the long stator coil with a specified axial force, and calculate the connection stress at the bolt fixing point. Based on the stress and thermal stress at the bolt fixing point under normal conditions, analyze at least one of the following characteristics of the long stator coil under temperature rise conditions: mechanical strength, fatigue characteristics, or durability. Also, based on the stress and connection stress at the bolt fixing point under normal conditions, analyze at least one of the following characteristics of the long stator coil under the condition of a sloped mounting surface.

[0099] Based on the same inventive concept, this application also provides a force measuring device for a ground coil model used to implement the force measuring method for the ground coil model described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of the one or more force measuring device embodiments for ground coil models provided below can be found in the limitations of the force measuring method for ground coil models described above, and will not be repeated here.

[0100] like Figure 5 As shown, this application also provides a force measurement device 500 for a ground coil model, which includes an acquisition module 501 configured to acquire the design parameters of the ground coil, including structural parameters and fabrication materials; a determination module 502 configured to determine the ground coil model based on the structural parameters and fabrication materials; a construction module 503 configured to construct a finite element simulation model of a superconducting high-speed magnetic levitation linear motor based on the ground coil model; a generation module 504 configured to generate a force waveform diagram of the ground coil model based on the finite element simulation model of the linear motor; and a measurement module 505 configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model, and measure the force condition of the ground coil model under normal working conditions and under deterioration conditions, respectively.

[0101] In one embodiment, the design parameters include electrical parameters, and the building module 503 is further configured to determine the stator electrical circuit based on the ground coil model; form stator units according to the electrical parameters and the stator electrical circuit; build a stator finite element simulation model with a preset stator scale according to the stator units; and build a finite element simulation model of the superconducting high-speed magnetic levitation linear motor through the stator finite element simulation model.

[0102] In one embodiment, the building module 503 is also configured as a linear array stator unit to build a stator finite element simulation model with a preset stator size.

[0103] In one embodiment, the generation module 504 is further configured to simulate the driving state of a maglev train at different speed levels using a finite element simulation model of a linear motor, and obtain the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period. The electromagnetic force on the ground coil model includes the electromagnetic force in each direction at each position of the ground coil model. Based on the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period, a force waveform diagram of the ground coil model is generated.

[0104] In one embodiment, the ground coil model is bolted to the track sidewall. The measurement module 505 is further configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model under normal operating conditions and measure a first force condition at the bolt fixing position; apply the electromagnetic force contained in the force waveform diagram to the ground coil model under deterioration conditions and measure a second force condition at the bolt fixing position; and evaluate the degree of influence of the deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil model based on the first and second force conditions.

[0105] In one embodiment, the degradation factors include temperature variation conditions, and the measurement module 505 is further configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model under temperature variation conditions, and to measure a second stress condition at the bolt fixing position, the second stress condition including thermal stress caused by instantaneous overcurrent temperature difference.

[0106] In one embodiment, the degradation factor conditions include coil surface accuracy variation conditions, and the measurement module 505 is further configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model under the coil surface accuracy variation conditions, and to measure a second force condition at the bolt fixing position, the second force condition including connection stress caused by unevenness of the coil mounting surface.

[0107] Each module in the force measurement device of the aforementioned ground coil model can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the client in hardware form or independent of it, or stored in the client's memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0108] This application also provides a force measurement device for a ground coil model. This force measurement device can be a computer device, and its internal structure diagram can be as follows: Figure 6 As 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 a non-volatile storage medium and internal memory. The non-volatile storage medium 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 medium. 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 measuring the force on a ground coil model. The display unit of the computer device is used to form a visually visible image. It can be a display screen, a projection device, or a virtual reality imaging device. 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.

[0109] Those skilled in the art will understand that Figure 6 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.

[0110] This application also provides a force measurement device for a ground coil model, which includes at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit performs the steps in the above-described method embodiments.

[0111] This application also provides a computer-readable storage medium storing a computer program executable by a force measurement device of a ground coil model. When the computer program is run on the force measurement device of the ground coil model, the force measurement device of the ground coil model performs the steps in the above-described method embodiments. The computer-readable storage medium may include, but is not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, microdrives, magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic cards or optical cards, nanosystems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and / or data.

[0112] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0113] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0114] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0115] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0116] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0117] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0118] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0119] The above description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

[0120] 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.

[0121] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for measuring the force on a ground coil model, characterized in that, include: Obtain the design parameters of the ground coil, including structural parameters and fabrication materials; Based on the structural parameters and the fabrication materials, a ground coil model is determined, and the ground coil model is installed on the side wall of the track by bolts; Based on the aforementioned ground coil model, a finite element simulation model of a superconducting high-speed magnetic levitation linear motor was constructed. Based on the finite element simulation model of the linear motor, a force waveform diagram of the ground coil model is generated; The electromagnetic force contained in the force waveform diagram is applied to the ground coil model. The stress on the bolt fixing points under normal working conditions and under deterioration conditions is measured respectively. Based on the stress on the bolt fixing points under normal working conditions and under deterioration conditions, the degree of influence of deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil model is evaluated. The deterioration conditions include coil surface accuracy variation conditions, which include setting the coil mounting surface of the ground coil and the inner wall of the track as a broken slope to simulate the working condition when the coil mounting surface is uneven. The electromagnetic force contained in the force waveform diagram is applied to the ground coil model under the coil surface accuracy variation conditions, and the measured stress on the bolt fixing points includes the connection stress caused by the unevenness of the coil mounting surface.

2. The method as described in claim 1, characterized in that, The design parameters include electrical parameters. The finite element simulation model of the superconducting high-speed magnetic levitation linear motor, built based on the ground coil model, includes: Based on the aforementioned ground coil model, the stator electrical circuit is determined; Based on the electrical parameters and the stator electrical circuit, a stator unit is formed; Based on the stator unit, a stator finite element simulation model with a predetermined stator size is constructed; A finite element simulation model of a superconducting high-speed magnetic levitation linear motor was built using the aforementioned stator finite element simulation model.

3. The method as described in claim 2, characterized in that, The step of constructing a stator finite element simulation model with a predetermined stator scale based on the stator unit includes: The stator elements are linearly arrayed to build a finite element simulation model of the stator with a preset stator size.

4. The method as described in claim 1, characterized in that, The finite element simulation model based on the linear motor generates a force waveform diagram of the ground coil model, including: The finite element simulation model of the linear motor is used to simulate the driving state of the maglev train at different speed levels, and the electromagnetic force on the ground coil model at different speed levels and at each moment within a preset time period is obtained. The electromagnetic force on the ground coil model includes the electromagnetic force in each direction at each position of the ground coil model. Based on the electromagnetic forces experienced by the ground coil model at different speed levels and at various times within a preset time period, a force waveform diagram of the ground coil model is generated.

5. The method as described in claim 1, characterized in that, The degradation factors include temperature change conditions. The electromagnetic force contained in the force waveform diagram is applied to the ground coil model under temperature change conditions. The measured stress at the bolt fixing position includes thermal stress caused by instantaneous overcurrent temperature difference.

6. A force measurement device for a ground coil model, characterized in that, include: An acquisition module is configured to acquire design parameters of the ground coil, including structural parameters and fabrication materials; A determination module is configured to determine a ground coil model based on the structural parameters and the fabrication materials, the ground coil model being bolted to the track sidewall; The module is configured to build a finite element simulation model of a superconducting high-speed magnetic levitation linear motor based on the ground coil model. The generation module is configured to generate a force waveform diagram of the ground coil model based on the finite element simulation model of the linear motor. A measurement module is configured to apply the electromagnetic force contained in the force waveform diagram to the ground coil model, and to measure the stress on the bolt fixing points under normal operating conditions and under deterioration conditions, respectively. Based on the stress on the bolt fixing points under normal operating conditions and under deterioration conditions, the module evaluates the degree of influence of deterioration factors on at least one of the mechanical strength, fatigue characteristics, or durability of the ground coil model. The deterioration conditions include coil surface accuracy variation conditions, which include setting the coil mounting surface of the ground coil and the inner wall of the track as a broken slope to simulate the working condition when the coil mounting surface is uneven. The electromagnetic force contained in the force waveform diagram is applied to the ground coil model under the coil surface accuracy variation conditions, and the measured stress on the bolt fixing points includes the connection stress caused by the unevenness of the coil mounting surface.

7. A force measurement device for a ground coil model, characterized in that, It includes at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program that, when executed by the processing unit, causes the processing unit to perform the steps of the method according to any one of claims 1-5.

8. A storage medium, characterized in that, It stores a computer program executed by a force measuring device of a ground coil model, which, when run on the force measuring device of the ground coil model, causes the force measuring device of the ground coil model to perform the steps of the method according to any one of claims 1-5.

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