A simulation method, device and electronic equipment for the whole process of heavy rail rolling

Abstract

The present application discloses a simulation method, device and electronic equipment for the whole process of heavy rail rolling. The method includes: obtaining the initial distribution range of the core material of the continuous casting billet, the physical parameters of the external material and the physical parameters of the core material, the target boundary conditions and the target contact conditions, and inputting them into a finite element system based on the CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet. Thus, the present application adopts a finite element simulation method based on the CEL algorithm, combines the advantages of Lagrangian grids and Eulerian grids, and can effectively solve problems such as large deformation, material failure and fluid materials. Further, by distinguishing the initial distribution range and material properties of the core material and the external material of the continuous casting billet, it provides support for studying the flow distribution of the core material of the continuous casting billet during the heavy rail rolling process.

Description

Technical Field

[0001] The present application relates to the technical field of rolling process control, and particularly relates to a simulation method, device and electronic device for the whole process of heavy rail rolling. Background Art

[0002] With the rapid development of technology in the field of railway transportation in China, accurately simulating the whole process of heavy rail rolling has become one of the main research directions. In particular, using the finite element method to simulate the heavy rail rolling process is an important means to obtain the metal flow law, temperature field distribution and stress-strain field distribution during the heavy rail rolling process.

[0003] In related technologies, the finite element method based on the Lagrangian algorithm or ALE (Arbitrary Lagrangian Eulerian adaptive meshing) algorithm is often used to simulate the heavy rail rolling process. However, in the process of simulation calculation using the aforementioned methods, there are still problems such as mesh distortion, cumbersome methods, high degree of manual intervention, inability to ensure the accuracy of node mapping before and after segmented simulation, and even the model shapes before and after adjacent two-segment simulations are inconsistent, which is different from the actual shape of the rolled piece. Further, based on the finite element method in related technologies, the material flow behavior of the core of the continuous casting billet cannot be predicted. In this way, it is often impossible to accurately improve the roll pass design, and it is very likely to cause problems such as low product accuracy and low finished product rate. In addition, the prediction result of the material flow behavior of the core of the continuous casting billet cannot be obtained accurately and intuitively.

[0004] Therefore, how to improve the accuracy and reliability in the simulation process of the whole process of heavy rail rolling, so as to accurately improve the roll pass design, improve product accuracy and finished product rate, and accurately and intuitively obtain the prediction result of the material flow behavior of the core of the continuous casting billet has become an urgent problem to be solved. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems in related technologies to some extent.

[0006] For this reason, the first object of the present application is to propose a simulation method for the whole process of heavy rail rolling, which is used to solve the technical problems in the prior art that it is impossible to accurately simulate the whole process of heavy rail rolling, and it is also impossible to accurately and intuitively obtain the prediction result of the material flow behavior of the core of the continuous casting billet.

[0007] To achieve the above object, an embodiment of the first aspect of the present application provides a simulation method for the whole process of heavy rail rolling, and the method includes: obtaining the initial distribution range of the core material of the continuous casting billet; obtaining the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet; obtaining the target boundary conditions and target contact conditions of the heavy rail to be simulated; inputting the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress-strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0008] In addition, a simulation method for the whole process of heavy rail rolling according to the above embodiment of the present application may further have the following additional technical features:

[0009] According to an embodiment of the present application, the obtaining of the target boundary conditions and target contact conditions of the heavy rail to be simulated includes: obtaining the rolling process parameters and ambient temperature of the heavy rail to be simulated, so as to obtain the target boundary conditions according to the rolling process parameters and the ambient temperature; obtaining the friction coefficient of the heavy rail to be simulated, so as to obtain the target contact conditions according to the friction coefficient.

[0010] According to an embodiment of the present application, the inputting of the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress-strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet, includes: inputting the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm, and performing simulation on the heavy rail to be simulated by the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrange body of the roll group in the finite element system based on the coupled Euler-Lagrange CEL algorithm, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress-strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0011] According to an embodiment of the present application, the construction process of the finite element system based on the coupled Euler-Lagrange CEL algorithm includes: obtaining the target Euler domain size and the target Euler domain range, and constructing the finite element model of the rolled piece Euler body according to the target Euler domain size and the target Euler domain range; obtaining the pass shapes of each roll in the roll group, and constructing the finite element model of the roll group Lagrangian body according to all the pass shapes; and constructing the finite element system based on the coupled Euler-Lagrange CEL algorithm according to the finite element model of the rolled piece Euler body and the finite element model of the roll group Lagrangian body.

[0012] According to an embodiment of the present application, the obtaining of the target Euler domain size and the target Euler domain range includes: obtaining the size of the rolled piece of the heavy rail to be simulated, and taking the size of the rolled piece as the minimum value of the target Euler domain size; obtaining the maximum range of deformation movement of the rolled piece during the rolling simulation, and taking the maximum range of deformation movement as the minimum value of the target Euler domain range.

[0013] According to an embodiment of the present application, the method further includes: defining the three-dimensional spatial size and position of the continuous casting billet before heavy rail rolling in the Euler domain, and taking the external material and the core material of the billet as the Euler body.

[0014] The present application discloses a simulation method, device and electronic equipment for the whole process of heavy rail rolling. The method obtains the initial distribution range of the core material of the continuous casting billet, obtains the physical parameters of the external material and the core material of the continuous casting billet, then obtains the target boundary conditions and target contact conditions of the heavy rail to be simulated, and further inputs the initial distribution range of the core material, the physical parameters of the external material of the billet, the physical parameters of the core material, the target boundary conditions and the target contact conditions into the finite element system based on the CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet. Thus, the present application no longer relies on the finite element simulation method based on Lagrangian, but adopts the finite element simulation method based on the CEL algorithm, combines the advantages of Lagrangian grids and Euler grids, can effectively solve problems such as large deformation, material failure and fluid materials, improves the accuracy and reliability in the simulation process of the whole process of heavy rail rolling, and further can accurately improve the roll pass design, and improve the product precision and the finished product rate. Further, by distinguishing the initial distribution range and material properties of the core material and the external material of the continuous casting billet, it is beneficial to separately study the deformation and flow distribution of the core material during the rolling process in the future, can intuitively and clearly display the distribution range of the core material in the post-processing, provides technical support for predicting and studying the flow distribution of the core material of the continuous casting billet during the heavy rail rolling process, and provides an important reference basis for clarifying the core material ratio requirements of the heavy rail continuous casting billet and improving the heavy rail quality.

[0015] To achieve the above object, an embodiment of the second aspect of the present application provides a simulation device for the whole process of heavy rail rolling, and the device includes: a first acquisition module, configured to acquire the initial distribution range of the core material of the continuous casting billet; a second acquisition module, configured to acquire the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet; a third acquisition module, configured to acquire the target boundary conditions and the target contact conditions of the heavy rail to be simulated; a simulation module, configured to input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0016] In addition, a simulation device for the whole process of heavy rail rolling according to the above embodiment of the present application may further have the following additional technical features:

[0017] According to an embodiment of the present application, the acquisition module is further configured to: acquire the rolling process parameters and the ambient temperature of the heavy rail to be simulated, so as to acquire the target boundary conditions according to the rolling process parameters and the ambient temperature; acquire the friction coefficient of the heavy rail to be simulated, so as to acquire the target contact conditions according to the friction coefficient.

[0018] According to an embodiment of the present application, the simulation module is further configured to: input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm, and perform simulation on the heavy rail to be simulated by the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrange body of the roll group in the finite element system based on the coupled Euler-Lagrange CEL algorithm, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0019] According to an embodiment of the present application, the device further includes a construction module, configured to: acquire the target Euler domain size and the target Euler domain range, and construct the finite element model of the Euler body of the rolled piece according to the target Euler domain size and the target Euler domain range; acquire the pass profile of each roll in the roll group, and construct the finite element model of the Lagrange body of the roll group according to all the pass profiles; construct the finite element system based on the coupled Euler-Lagrange CEL algorithm according to the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrange body of the roll group.

[0020] According to an embodiment of the present application, the building module is further configured to: obtain the rolled piece size of the heavy rail to be simulated, and use the rolled piece size as the minimum value of the target Euler domain size; obtain the maximum range of deformation movement of the rolled piece during the rolling simulation, and use the maximum range of deformation movement as the minimum value of the target Euler domain range.

[0021] According to an embodiment of the present application, the building module is further configured to: define the three-dimensional spatial size and position of the continuous casting billet before heavy rail rolling in the Euler domain, and use the external material and core material of the continuous casting billet as the Euler body.

[0022] To achieve the above object, an embodiment of the third aspect of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the simulation method for the entire process of heavy rail rolling as described in any one of the embodiments of the first aspect of the present application.

[0023] To achieve the above object, an embodiment of the fourth aspect of the present application provides a non-transitory computer-readable storage medium storing computer instructions, and the computer instructions are used to cause a computer to implement the simulation method for the entire process of heavy rail rolling as described in any one of the embodiments of the first aspect of the present application when executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the method for simulating the entire process of heavy rail rolling disclosed in an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the method for simulating the entire process of heavy rail rolling disclosed in an embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the method for simulating the entire process of heavy rail rolling disclosed in an embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the method for simulating the entire process of heavy rail rolling disclosed in an embodiment of the present application.

[0028] Figure 5 It is a schematic diagram of the method for simulating the entire process of heavy rail rolling disclosed in an embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the three-dimensional space of the continuous casting billet before heavy rail rolling disclosed in an embodiment of the present application.

[0030] Figure 7 It is a schematic diagram of the initial size of the rolled piece disclosed in an embodiment of the present application.

[0031] Figure 8 Schematic diagram of the pass profile of the BD2 roll for heavy rail rolling disclosed in an embodiment of the present application.

[0032] Figure 9 Schematic diagram of the Lagrangian finite element model of the roll set of the BD2 rolling mill disclosed in an embodiment of the present application.

[0033] Figure 10 Schematic diagram of the heavy rail BD2 rolling process disclosed in an embodiment of the present application.

[0034] Figure 11 Schematic diagram of the distribution of the core material of the heavy rail continuous casting billet at the stable cross-sections of each pass of BD2 disclosed in an embodiment of the present application.

[0035] Figure 12 Schematic diagram of the structure of the simulation device for the whole process of heavy rail rolling disclosed in an embodiment of the present application.

[0036] Figure 13 Schematic diagram of the structure of the simulation device for the whole process of heavy rail rolling disclosed in an embodiment of the present application.

[0037] Figure 14 Schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application. Detailed implementation manners

[0038] To better understand the above technical solutions, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0039] It should be noted that by using the finite element method to simulate the heavy rail rolling process, the metal flow law, temperature field distribution and stress-strain field distribution during the heavy rail rolling process can be obtained, which is of great significance for improving the roll pass profile design, product accuracy and finished product rate.

[0040] However, heavy rail rolling is a large-deformation special-shaped rolling with numerous passes. During the simulation calculation process, the mesh distortion is serious, which affects the simulation accuracy and even leads to the termination of the calculation. Using mesh redrawing will result in inconsistent mesh nodes before and after, and the metal flow cannot be accurately tracked.

[0041] To improve the simulation accuracy, in related technologies, a combined method of model extraction, mesh reconstruction, and node mapping is often used for segmented simulation to achieve the entire heavy rail rolling process. However, such finite element methods are based on the Lagrangian algorithm or the ALE (Arbitrary Lagrangian Eulerian adaptive meshing) algorithm. There are still mesh distortions in the simulation calculation process, the method is cumbersome, the degree of manual intervention is large, and the segmented simulation cannot guarantee the accuracy of node mapping before and after; moreover, such methods reconstruct the mesh by extracting a certain spatial surface, making the model shapes before and after adjacent two-segment simulations inconsistent, and different from the actual shape of the rolled piece.

[0042] Furthermore, in recent years, high-speed railways around the world have developed vigorously. Especially in China, the scale of high-speed railways is getting larger and larger, ranking first in the world, and higher requirements are put forward for its key component, heavy rails, namely high strength and toughness, high purity, high precision, and high flatness. The factors affecting the quality of heavy rail products include the forming quality of continuous casting billets of heavy rail steel and process parameters during heavy rail rolling, such as rolling temperature, rolling speed, reduction ratio, roll diameter, etc. However, the continuous casting billet of heavy rail steel is not a homogeneous material. Due to problems such as central segregation, porosity, and shrinkage cavity in the core area of the continuous casting billet of heavy rail steel, the material properties of the outer and core parts of the continuous casting billet of heavy rail steel are inconsistent. Furthermore, during the rolling process, the distribution of the core material of the continuous casting billet affects the mechanical properties of heavy rails.

[0043] Among them, the rail head is an important sampling position for rail inspection. The distribution of the core material with element segregation in the rail head affects the inspection results and the qualification rate. Therefore, to improve the acceptance qualification rate of heavy rails and clarify the ratio requirements of the core material of the continuous casting billet before rolling, it is particularly important to study the flow distribution of the core material of the continuous casting billet of heavy rail steel during the rolling process.

[0044] In summary, the heavy rail rolling process includes BD1 rolling, BD2 rolling, and universal continuous rolling, involving many complex problems that are difficult to handle by traditional experimental means. With the development of finite element software, the finite element method has been more and more widely used in the field of heavy rail rolling. Using the finite element method to simulate the heavy rail rolling process can obtain the metal flow law, temperature field, and stress-strain field distribution during the heavy rail rolling process, which is of great significance for improving the roll pass design, product accuracy, and finished product rate, etc.

[0045] However, the current finite element simulation study on the heavy rail steel rolling process still has limitations: First, in terms of research content, it mainly focuses on the influence of rolling process parameters on the rolling process of homogeneous heavy rail continuous casting billets, and regards the heavy rail steel continuous casting billets as homogeneous materials; Second, in terms of research methods, heavy rail rolling is a large-deformation special-shaped rolling with numerous passes. During the simulation calculation process, the mesh distortion is serious, which affects the simulation accuracy and even leads to the termination of the calculation. When using mesh redrawing, the front and rear mesh nodes will be inconsistent, and the metal flow cannot be accurately tracked. To improve the simulation accuracy, some scholars have proposed to use a combined method of model extraction, mesh reconstruction, and node mapping for segmented simulation to achieve the entire heavy rail rolling process.

[0046] Therefore, this application proposes a finite element simulation method based on the Coupled Eulerian-Lagrangian (CEL) algorithm, which can avoid mesh distortion and segmented simulation, continuously simulate the entire heavy rail rolling process, and thus provide technical support for studying and predicting the heavy rail rolling process. On this basis, it provides technical support for predicting the flow distribution of the core material of the continuous casting billet during the heavy rail rolling process, and provides an important reference basis for clarifying the requirements for the core material ratio (the ratio of the core material volume to the total volume of the continuous casting billet) of the heavy rail continuous casting billet and improving the quality of heavy rails.

[0047] The following describes a simulation method, device, and electronic device for the entire heavy rail rolling process according to an embodiment of this application with reference to the accompanying drawings.

[0048] Figure 1 It is a schematic flowchart of a simulation method for the entire heavy rail rolling process according to an embodiment disclosed in this application.

[0049] As shown in Figure 1 the simulation method for the entire heavy rail rolling process proposed in the embodiment of this application specifically includes the following steps:

[0050] S101. Obtain the initial distribution range of the core material of the continuous casting billet.

[0051] Among them, the continuous casting billet includes external material and core material. There are differences in the element composition and crystal types between the external material and the core material of the continuous casting billet.

[0052] It should be noted that in this application, the specific method for obtaining the initial distribution range of the core material of the continuous casting billet is not limited and can be set according to the actual situation.

[0053] As a possible implementation manner, optionally, since the core material has composition segregation and is coarse equiaxed crystal. Therefore, the initial distribution range of the core material of the continuous casting billet can be obtained by performing metallographic macrostructure characterization to obtain the distribution range of the coarse equiaxed crystal.

[0054] S102. Obtain the physical parameters of the external material and the core material of the continuous casting billet.

[0055] Among them, the physical parameters of the external material and the core material of the billet include thermal conductivity, specific heat, density, elastic modulus, Poisson's ratio, thermal constitutive relationship, etc.

[0056] It should be noted that in this application, the specific method for obtaining the physical parameters of the external material and the core material of the continuous casting billet is not limited and can be set according to the actual situation.

[0057] As a possible implementation, optionally, thermal compression specimens of the external material and the core material of the continuous casting billet can be prepared, and through thermal compression tests, the stress-strain relationships of the external material and the core material of the continuous casting billet at different temperatures and strain rates can be obtained respectively. Further, the thermal constitutive relationships of the external material and the core material of the continuous casting billet are calculated respectively.

[0058] S103. Obtain the target boundary conditions and target contact conditions of the to-be-simulated heavy rail.

[0059] In the embodiments of this application, the target boundary conditions and target contact conditions of the to-be-simulated heavy rail can be obtained to perform mesh division, boundary condition setting, and contact setting, thereby laying a foundation for simulating heavy rail rolling.

[0060] It should be noted that in this application, the specific method for obtaining the target boundary conditions and target contact conditions of the to-be-simulated heavy rail is not limited and can be set according to the actual situation.

[0061] As a possible implementation, optionally, relevant staff can input acquisition instructions for the target boundary conditions and target contact conditions of the to-be-simulated heavy rail in ways such as text and voice. Correspondingly, the acquisition instructions can be received, and according to the acquisition instructions, the target boundary conditions and target contact conditions of the to-be-simulated heavy rail can be obtained.

[0062] As another possible implementation, optionally, the target operation can be actively detected, and after detecting the target operation, the target boundary conditions and target contact conditions of the to-be-simulated heavy rail can be obtained.

[0063] Among them, the target operation can be set according to the actual situation. For example, it can be set that the operation device associated with the target operation is powered on, the associated application program is opened, etc.

[0064] S104. Input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet.

[0065] It should be noted that in the finite element simulation analysis based on the Lagrangian algorithm in the related art, the grid nodes are bound to the material, and the grid elements deform with the deformation of the material. Therefore, when the material undergoes large deformation, the grid distortion is serious.

[0066] Therefore, the present application adopts the finite element simulation analysis method based on the CEL algorithm, that is, uses the finite element system based on the CEL algorithm for simulation. Different from the finite element simulation method based on the Lagrangian algorithm in the related art, in the present application, in the Euler domain, the grid nodes are fixed, and the material deforms and flows within the grid. Therefore, during the finite element simulation analysis based on the CEL algorithm, the rolled piece deforms in the Euler domain and no grid distortion will occur.

[0067] That is to say, based on the inherent properties of the Lagrangian body and the Eulerian body, that is, the grid nodes of the Lagrangian body are associated with the material, the grid elements deform with the deformation of the material, and the grid nodes of the Eulerian body are fixed and the material flows in the grid, which can ensure the accuracy of the simulation process of the whole process of heavy rail rolling.

[0068] Furthermore, in the present application, the initial distribution range and material properties of the core material and the external material of the continuous casting billet are also distinguished.

[0069] In the embodiment of the present application, after obtaining the initial distribution range of the core material of the heavy rail to be simulated, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions, the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions can be input into the finite element system based on the CEL algorithm for simulation, and the simulation results are output, that is, the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet.

[0070] Among them, the CEL algorithm refers to an algorithm that effectively combines the Lagrangian algorithm and the Euler algorithm.

[0071] Among them, the finite element system based on the CEL algorithm refers to a simulation system including at least one convergent model.

[0072] The simulation method for the whole process of heavy rail rolling provided by this application can obtain the initial distribution range of the core material of the continuous casting billet, and obtain the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet. Then, obtain the target boundary conditions and target contact conditions of the heavy rail to be simulated, and then input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions and the target contact conditions into the finite element system based on the CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet. Thus, this application no longer relies on the finite element simulation method based on Lagrange, but adopts the finite element simulation method based on the CEL algorithm, which combines the advantages of Lagrangian grids and Eulerian grids, can effectively solve problems such as large deformation, material failure and fluid materials, improves the accuracy and reliability in the simulation process of the whole process of heavy rail rolling, and then can accurately improve the roll pass design and improve the product accuracy and yield. Further, by distinguishing the initial distribution range and material properties of the core material and the external material of the continuous casting billet, it is beneficial to separately study the deformation and flow distribution of the core material during the rolling process next, and can intuitively display the distribution range of the core material in the post-processing, providing technical support for predicting and studying the flow distribution of the core material of the continuous casting billet during the heavy rail rolling process, and providing an important reference basis for clarifying the core material ratio requirements of the heavy rail continuous casting billet and improving the heavy rail quality.

[0073] It should be noted that in this application, when obtaining the target boundary conditions and target contact conditions of the heavy rail to be simulated, relevant parameters can be obtained.

[0074] As a possible implementation manner, as Figure 2 shown, on the basis of the above embodiment, the specific process of obtaining the target boundary conditions and target contact conditions of the heavy rail to be simulated in step S103 includes the following steps:

[0075] S201. Obtain the rolling process parameters and ambient temperature of the heavy rail to be simulated, so as to obtain the target boundary conditions according to the rolling process parameters and ambient temperature.

[0076] Among them, the rolling process parameters include at least one of the following parameters: rolling speed, rolling temperature, etc.

[0077] Thus, in this application, after obtaining the rolling process parameters and ambient temperature of the heavy rail to be simulated, the target boundary conditions can be obtained according to the rolling process parameters and ambient temperature.

[0078] S202. Obtain the friction coefficient of the heavy rail to be simulated, so as to obtain the target contact conditions according to the friction coefficient.

[0079] Further, after obtaining the initial distribution range of the core material of the heavy rail to be simulated, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions, the calculation can be submitted in the finite element system based on the CEL algorithm, that is, input into the finite element system based on the CEL algorithm for simulation, so that the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet can be obtained in the post-processing interface.

[0080] It should be noted that the specific model included in the finite element system based on the CEL algorithm in this application is not limited and can be set according to the actual situation.

[0081] As a possible implementation, it can be set that the finite element system based on the CEL algorithm includes an Eulerian finite element model of the rolled piece and a Lagrangian finite element model of the roll group.

[0082] Optionally, the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions obtained according to the relevant parameters can be input into the finite element system based on the CEL algorithm, and the Eulerian finite element model of the rolled piece and the Lagrangian finite element model of the roll group in the finite element system based on the CEL algorithm are used to simulate the heavy rail to be simulated, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet.

[0083] It should be noted that in this application, the Eulerian finite element model of the rolled piece and the Lagrangian finite element model of the roll group can be constructed respectively, and then the constructed Eulerian finite element model of the rolled piece and the Lagrangian finite element model of the roll group are used as the finite element system based on the CEL algorithm.

[0084] As a possible implementation, as Figure 3 shown, on the basis of the above embodiment, it specifically includes the following steps:

[0085] S301. Obtain the target Euler domain size and the target Euler domain range, and construct an Eulerian finite element model of the rolled piece according to the target Euler domain size and the target Euler domain range.

[0086] It should be noted that the specific method for obtaining the target Euler domain size and the target Euler domain range in this application is not limited and can be selected according to the actual situation.

[0087] As a possible implementation, as Figure 4 shown, on the basis of the above embodiment, the specific process of obtaining the target Euler domain size and the target Euler domain range in the above step S301 includes the following steps:

[0088] S401. Obtain the rolled piece dimensions of the heavy rail to be simulated, and use the rolled piece dimensions as the minimum value of the target Euler domain dimensions.

[0089] In the embodiments of the present application, the rolled piece dimensions of the heavy rail to be simulated can be obtained, and the rolled piece dimensions are used as the minimum value of the target Euler domain dimensions. That is to say, in the present application, it can be ensured that the dimensions of the Euler domain are larger than the dimensions of the rolled piece.

[0090] S402. Obtain the maximum range of deformation and movement of the rolled piece during the rolling simulation, and use the maximum range of deformation and movement as the minimum value of the target Euler domain range.

[0091] In the embodiments of the present application, the maximum range of deformation and movement of the rolled piece during the rolling simulation can be obtained, and the maximum range of deformation and movement is used as the minimum value of the target Euler domain range. That is to say, in the present application, it can be ensured that the range of the Euler domain covers the range of deformation and movement of the rolled piece during the rolling simulation.

[0092] Furthermore, in the present application, the three-dimensional spatial dimensions and positions of the continuous casting billet before heavy rail rolling can be defined in the Euler domain, and the billet is used as the Euler body.

[0093] S302. Obtain the pass profiles of each roll in the roll group, and construct a Lagrangian body finite element model of the roll group based on all the pass profiles.

[0094] Among them, the roll group includes the rolls of the BD1 rolling mill, the rolls of the BD2 rolling mill, and the universal continuous rolling roll group.

[0095] In this way, process one by one. As a result, it often takes a long time for the rolls of the BD1 rolling mill, the rolls of the BD2 rolling mill, and the universal continuous rolling roll group.

[0096] Therefore, in the present application, in order to improve the simulation speed of the entire heavy rail rolling process, the actual rolls can be divided into several pairs of rolls according to the pass profiles of each pass, that is, obtain the pass profiles of each roll in the roll group, and construct a Lagrangian body finite element model of the roll group based on all the pass profiles.

[0097] S303. Construct a finite element system based on the coupled Euler-Lagrange CEL algorithm according to the rolled piece Eulerian body finite element model and the roll group Lagrangian body finite element model.

[0098] The simulation method for the whole process of heavy rail rolling provided by this application can input the target material properties, target boundary conditions, and target contact conditions into a finite element system based on the CEL algorithm. The finite element model of the Euler body of the rolled piece and the finite element model of the Lagrangian body of the roll group in the finite element system based on the CEL algorithm are used to simulate the heavy rail to be simulated, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, and the simulation results of the stress and strain field distribution. Therefore, this application adopts a finite element system based on the CEL algorithm including the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrangian body of the roll group, which can ensure that during the simulation of the whole process of heavy rail rolling, the rolled piece deforms in the Euler domain and no mesh distortion occurs. Further, it lays a foundation for accurately obtaining the prediction results of the core material flow behavior of the continuous casting billet.

[0099] Figure 5 It is a schematic flow chart of a simulation method for the whole process of heavy rail rolling according to another embodiment disclosed in this application.

[0100] As Figure 5 shown, the simulation method for the whole process of heavy rail rolling proposed in the embodiment of this application specifically includes the following steps:

[0101] S501. Obtain the initial distribution range of the core material of the continuous casting billet.

[0102] S502. Obtain the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet.

[0103] S503. Obtain the rolling process parameters and the ambient temperature of the heavy rail to be simulated, and obtain the target boundary conditions according to the rolling process parameters and the ambient temperature.

[0104] S504. Obtain the friction coefficient of the heavy rail to be simulated, and obtain the target contact conditions according to the friction coefficient.

[0105] S505. Input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0106] For example, it can be set that the volume ratio of the core material of the rolled piece before BD2 rolling is 21.3%. Further, the finite element system based on the CEL algorithm includes a finite element model of the Euler body of the rolled piece and a finite element model of the Lagrangian body of the roll group.

[0107] For the finite element model of the Euler body of the rolled piece, optionally, it can be established as Figure 6The Eulerian finite element model of the rolled piece shown. The size of the Eulerian domain needs to be larger than that of the rolled piece, and the range of the Eulerian domain needs to include the deformation and movement ranges of the rolled piece during the rolling simulation, which is the finite element model of the Eulerian domain.

[0108] Furthermore, define the three-dimensional spatial size and position of the continuous casting billet before heavy rail rolling in the Eulerian domain, and regard the external material and core material of the billet as Eulerian bodies; as Figure 6 shown, region 6-1 is the initial position of the rolled piece. The material of the rolled piece is defined as an elastoplastic body. As Figure 7 shown, before BD2 rolling, the initial size of the rolled piece is: width 220 mm × height 230 mm × length 600 mm, where the cross-sectional width of the core material is 90 mm and the height is 120 mm.

[0109] For the Lagrangian finite element model of the roll set, optionally, a Lagrangian finite element model of the roll set of the BD2 rolling mill can be established according to the heavy rail rolling BD2 roll pass shown as Figure 8 shown. Since the deformation of the roll can be ignored compared with the rolled piece during the rolling process, the roll material is defined as a rigid body. Figure 9 shown.

[0110] Furthermore, after the finite element system based on the CEL algorithm is constructed, material property settings, mesh generation, boundary condition settings, and contact settings can be carried out to perform rolling simulation calculations.

[0111] Regarding material property settings, the roll is a Lagrangian body and is defined as a rigid body, and the rolled piece is an Eulerian body and is defined as an elastoplastic body. Set the physical parameters (thermal conductivity, specific heat, density, elastic modulus, Poisson's ratio, and constitutive relationship) of the external material and core material of the billet according to the actual working conditions and materials.

[0112] Regarding mesh generation and element type definition, since the roll diameter is large, to reduce the number of elements, shorten the calculation time while ensuring the calculation accuracy, the roll is set as a shell element. The roll element type is S4RT, the mesh size is 10 mm, and the Eulerian body element type is EC3D8RT, and the mesh size is 8 mm.

[0113] Regarding contact condition settings. The contact between the roll and the rolled piece is a general penalty function contact, and the Coulomb friction law is adopted. Set the initial temperature and ambient temperature of the billet and the roll, set the heat transfer coefficient between the billet and the roll and the environment, and the rolling speed of each pass is determined according to the actual working conditions.

[0114] Regarding boundary condition setting. The rolling process of the heavy rail BD2 is a 5-pass reciprocating rolling process. During the finite element simulation, in each pass, a certain initial velocity (in the -Z direction) is first given to the rolled piece, and the rolls rotate at a constant speed. After the rolled piece comes into contact with the rolls, relying on the frictional force between the two, the rolled piece is bitten into the roll gap, and then rolling deformation occurs. After completing the rolling of this pass, the roll set is moved (in the -Y direction) to align the roll gap of the next pass with the rolled piece, and a reverse velocity (in the +Z direction) is given to the entire rolled piece to make it bite into the roll gap, thereby realizing reciprocating rolling. Figure 10 ) After the rolling of each pass is completed, the roll set is translated. At this time, the rolls have degrees of freedom in the translation direction and axial rotation. In addition, in other processes, the rolls only have degrees of freedom in axial rotation. During the entire rolling process, the degrees of freedom of the rolled piece are not restricted.

[0115] Regarding the simulation calculation, it can be carried out according to the finite element system based on the CEL algorithm, and the distribution of the core material of the continuous casting billet of heavy rail steel at the stable cross-section of each pass of BD2 can be obtained, as Figure 11 shown. The results show that during the rolling process of BD2, the cross-section of the core material of the rolled piece gradually changes from a rectangle to a long strip, and the width-to-height ratio becomes smaller. After rolling by BD2, the core material is mainly distributed in the middle of the web and the lower middle part of the head of the rail, accounting for about 14% and 50% of the cross-sectional area of the head and web of the rail respectively. Among them, Figure 11 (a) - (e) in

[0116] respectively show the flow distribution of the core material of the rolled piece at the stable cross-section of the rolling exit of the first pass - the fifth pass of BD2.

[0117] Figures 12 - 13 is a schematic structural diagram of a simulation device for the whole process of heavy rail rolling according to an embodiment disclosed in the present application.

[0118] AsFigure 13 As shown in the figure, the simulation device 100 for the whole process of heavy rail rolling includes: a first acquisition module 11, a second acquisition module 12, a third acquisition module 13, and a simulation module 14. Among them,

[0119] The first acquisition module 11 is used to acquire the initial distribution range of the core material of the continuous casting billet;

[0120] The second acquisition module 12 is used to acquire the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet;

[0121] The third acquisition module 13 is used to acquire the target boundary conditions and target contact conditions of the heavy rail to be simulated;

[0122] The simulation module 14 is used to input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress-strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0123] According to an embodiment of the present application, the third acquisition module 13 is further used for:

[0124] Acquiring the rolling process parameters and ambient temperature of the heavy rail to be simulated, and acquiring the target boundary conditions according to the rolling process parameters and the ambient temperature;

[0125] Acquiring the friction coefficient of the heavy rail to be simulated, and acquiring the target contact conditions according to the friction coefficient.

[0126] According to an embodiment of the present application, the simulation module 14 is further used for:

[0127] Inputting the initial distribution range of the core material, the physical parameters of the external material of the billet, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm, and performing simulation on the heavy rail to be simulated by the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrange body of the roll group in the finite element system based on the coupled Euler-Lagrange CEL algorithm, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress-strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet.

[0128] According to an embodiment of the present application, as Figure 13 shown, the simulation device 100 for the whole process of heavy rail rolling further includes a construction module 15, which is used for:

[0129] Obtain the target Euler domain size and the target Euler domain range, and construct the finite element model of the rolled piece Euler body according to the target Euler domain size and the target Euler domain range;

[0130] Obtain the pass profile of each roll in the roll set, and construct the finite element model of the roll set Lagrangian body according to all the pass profiles;

[0131] Construct the finite element system based on the coupled Euler-Lagrange CEL algorithm according to the finite element model of the rolled piece Euler body and the finite element model of the roll set Lagrangian body.

[0132] According to an embodiment of the present application, the construction module 15 is further configured to:

[0133] Obtain the size of the rolled piece of the heavy rail to be simulated, and use the size of the rolled piece as the minimum value of the target Euler domain size;

[0134] Obtain the maximum range of deformation movement of the rolled piece during the rolling simulation, and use the maximum range of deformation movement as the minimum value of the target Euler domain range.

[0135] According to an embodiment of the present application, the construction module 15 is further configured to:

[0136] Define the three-dimensional spatial size and position of the continuous casting billet before heavy rail rolling in the Euler domain, and use the external material and the core material of the continuous casting billet as the Euler body.

[0137] A simulation device for the whole process of heavy rail rolling provided by an embodiment of the present application can obtain the initial distribution range of the core material of a continuous casting billet, obtain the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet, then obtain the target boundary conditions and target contact conditions of the heavy rail to be simulated, and further input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions and the target contact conditions into a finite element system based on the CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet. Thus, the present application no longer relies on the finite element simulation method based on Lagrangian, but adopts the finite element simulation method based on the CEL algorithm, which combines the advantages of Lagrangian grids and Eulerian grids, can effectively solve problems such as large deformation, material failure and fluid materials, improves the accuracy and reliability in the simulation process of the whole process of heavy rail rolling, and can further accurately improve the roll pass design and improve the product precision and yield. Further, by distinguishing the initial distribution range and material properties of the core material and the external material of the continuous casting billet, it is beneficial to separately study the deformation and flow distribution of the core material during the rolling process in the future, and can intuitively and clearly display the distribution range of the core material in post-processing, providing technical support for predicting and studying the flow distribution of the core material of the continuous casting billet during the heavy rail rolling process, and providing an important reference basis for clarifying the core material ratio requirements of the heavy rail continuous casting billet and improving the heavy rail quality.

[0138] To implement the above embodiment, the present application also proposes an electronic device 2000, as Figure 14 shown, including a memory 210, a processor 220, and a computer program stored on the memory 210 and executable on the processor 220. When the processor executes the program, it implements the foregoing simulation method for the whole process of heavy rail rolling.

[0139] To implement the above embodiment, the present application also proposes a non-transitory computer-readable storage medium storing computer instructions, and the computer instructions are used to cause a computer to implement the foregoing simulation method for the whole process of heavy rail rolling when executed.

[0140] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0141] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0142] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0143] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0144] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0145] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A simulation method for the whole process of heavy rail rolling, including: Obtaining the initial distribution range of the core material of the continuous casting billet; Obtaining the physical parameters of the external material and the physical parameters of the core material of the continuous casting billet; Obtaining the target boundary conditions and target contact conditions of the heavy rail to be simulated; Inputting the initial distribution range of the core material, the physical parameters of the external material of the continuous casting billet, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet; The obtaining of the target boundary conditions and target contact conditions of the heavy rail to be simulated includes: Obtaining the rolling process parameters and ambient temperature of the heavy rail to be simulated, and obtaining the target boundary conditions according to the rolling process parameters and the ambient temperature; Obtaining the friction coefficient of the heavy rail to be simulated, and obtaining the target contact conditions according to the friction coefficient; The construction process of the finite element system based on the coupled Euler-Lagrange CEL algorithm includes: Obtaining the target Euler domain size and target Euler domain range, and constructing the finite element model of the rolled piece Euler body according to the target Euler domain size and the target Euler domain range; Obtaining the pass profile of each roll in the roll set, and constructing the finite element model of the roll set Lagrange body according to all the pass profiles; Constructing the finite element system based on the coupled Euler-Lagrange CEL algorithm according to the finite element model of the rolled piece Euler body and the finite element model of the roll set Lagrange body; The obtaining of the target Euler domain size and target Euler domain range includes: Obtaining the size of the rolled piece of the heavy rail to be simulated, and taking the size of the rolled piece as the minimum value of the target Euler domain size; Obtaining the maximum range of deformation and movement of the rolled piece during the rolling simulation, and taking the maximum range of deformation and movement as the minimum value of the target Euler domain range.

2. The simulation method according to claim 1, wherein, The inputting of the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into a finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the core material flow behavior of the continuous casting billet includes: Input the initial distribution range of the core material, the physical parameters of the external material of the billet, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm. Use the finite element models of the Euler body of the rolled piece and the Lagrange body of the roll group in the finite element system based on the coupled Euler-Lagrange CEL algorithm to simulate the heavy rail to be simulated, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet.

3. The simulation method according to claim 1, wherein, the method further includes: Define the three-dimensional spatial dimensions and positions of the continuous casting billet before heavy rail rolling in the Euler domain, and regard the external material and core material of the continuous casting billet as the Euler body.

4. A simulation device for the whole process of heavy rail rolling, including: The first acquisition module is used to acquire the initial distribution range of the core material of the continuous casting billet; The second acquisition module is used to acquire the physical parameters of the external material and the core material of the continuous casting billet; The third acquisition module is used to acquire the target boundary conditions and target contact conditions of the heavy rail to be simulated; The simulation module is used to input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm for simulation, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece of the heavy rail to be simulated, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet; The third acquisition module is further used for: Acquire the rolling process parameters and ambient temperature of the heavy rail to be simulated, and acquire the target boundary conditions according to the rolling process parameters and the ambient temperature; Acquire the friction coefficient of the heavy rail to be simulated, and acquire the target contact conditions according to the friction coefficient; The device further includes a construction module for: Acquire the target Euler domain size and target Euler domain range, and construct the finite element model of the Euler body of the rolled piece according to the target Euler domain size and the target Euler domain range; Acquire the pass profile of each roll in the roll group, and construct the finite element model of the Lagrange body of the roll group according to all the pass profiles; Construct the finite element system based on the coupled Euler-Lagrange CEL algorithm according to the finite element model of the Euler body of the rolled piece and the finite element model of the Lagrange body of the roll group; The construction module is further used for: Acquire the size of the rolled piece of the heavy rail to be simulated, and use the size of the rolled piece as the minimum value of the target Euler domain size; Acquire the maximum range of deformation and movement of the rolled piece during the rolling simulation, and use the maximum range of deformation and movement as the minimum value of the target Euler domain range.

5. The simulation device according to claim 4, wherein, the simulation module is further used for: Input the initial distribution range of the core material, the physical parameters of the external material, the physical parameters of the core material, the target boundary conditions, and the target contact conditions into the finite element system based on the coupled Euler-Lagrange CEL algorithm. Use the finite element models of the Eulerian body of the rolled piece and the Lagrangian body of the roll set in the finite element system based on the coupled Euler-Lagrange CEL algorithm to simulate the heavy rail to be simulated, so as to output the simulation results of the metal deformation and flow behavior of the rolled piece, the simulation results of the temperature field distribution, the simulation results of the stress and strain field distribution, and the prediction results of the flow behavior of the core material of the continuous casting billet.

6. The simulation device according to claim 4, wherein, the construction module is further configured to: Define the three-dimensional spatial dimensions and positions of the continuous casting billet before heavy rail rolling in the Eulerian domain, and regard the external material and the core material of the continuous casting billet as Eulerian bodies.

7. An electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1-3.

8. A non-transitory computer-readable storage medium storing computer instructions, wherein, the computer instructions are used to cause the computer to execute the method according to any one of claims 1-3.

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