A method for simulating additive manufacturing partitioning processes

Abstract

The present invention provides an additive manufacturing partition process simulation method, which first performs layered processing on a finite element mesh model according to additive process parameters to obtain a finite element mesh layer corresponding to each stack of the additive manufacturing process; partitions the obtained mesh layer according to the additive manufacturing partition process to obtain a finite element mesh group corresponding to each partition; numbers the mesh group corresponding to each partition and records the numbering information; determines the activation order of the mesh group corresponding to each partition according to the jump sequence strategy of the additive partition process through the numbering information; and sequentially activates the mesh group corresponding to each partition according to the activation order to perform stress and deformation simulation calculations, thereby solving and improving the problem and current situation that the results of the complex partition process of additive manufacturing in actual engineering are difficult to predict, which limits the application potential of the process.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing, and in particular to an additive manufacturing partition process simulation method, device, and equipment-readable storage medium. Background Art

[0002] Additive manufacturing technology is one of the most important and promising manufacturing technologies in the manufacturing industry, and the additive manufacturing technology of large structural parts is one of the key difficulties in engineering practice. In the additive manufacturing of large structural parts, due to the large cross-sectional area of ​​the layers, the use of continuous scanning usually leads to process defects such as excessive deformation and stress concentration cracking. Therefore, partitioning the scanning area is one of the effective ways to solve this engineering problem; with the increasing complexity of manufacturing structures and processes, the design of additive manufacturing partitioning processes has become more and more complex and changeable. Traditional engineering experience and experimental methods are difficult to predict the results of complex partitioned additive manufacturing.

[0003] In view of this, this application is filed. Summary of the invention

[0004] The present invention discloses an additive manufacturing partitioning process simulation method, device, and equipment-readable storage medium, aiming to solve and improve the problem and current situation that the results of complex partitioning processes in additive manufacturing in actual engineering are difficult to predict, resulting in limited application potential of the process.

[0005] A first embodiment of the present invention provides an additive manufacturing partition process simulation method, comprising:

[0006] Obtain the finite element mesh model of the additive structure;

[0007] Acquiring additive process parameters, and performing layered processing on the finite element mesh model according to the process parameters to generate a finite element mesh layer for each stacking layer of the additive structure in the manufacturing process;

[0008] Creating a boundary curve of the additive material, and partitioning the finite element mesh layer of each stacked layer according to the boundary curve to generate a finite element mesh group corresponding to each partition;

[0009] Numbering the finite element mesh groups corresponding to each partition and generating numbering information;

[0010] Acquire a jump sequence strategy of a partitioning process of additive manufacturing, and generate an activation sequence of a finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy;

[0011] Obtain mandatory conditions, and perform stress and deformation simulation operations on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation sequence.

[0012] Preferably, the additive process parameters include: a layer height of a layered process, a number of layers of a layered process, a layered normal, a layered scanning direction, and a layered process grouping.

[0013] Preferably, the boundary curve for creating the additive material is specifically:

[0014] A global coordinate system is established, and a boundary curve is generated in the global coordinate system according to an expression of the boundary curve.

[0015] Preferably, the jump sequence strategy for obtaining the partition process of the additive manufacturing generates the activation sequence of the finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy, specifically:

[0016] Create a queue;

[0017] The position of the finite element mesh group corresponding to each partition in the queue is determined according to the jump order strategy of the partition process, and the activation order of the finite element mesh group corresponding to each partition is generated according to the position.

[0018] Preferably, the mandatory conditions include:

[0019] In a layer-priority additive process, before the current partition is activated, all partitions contained in the previous layer of the layer to which it belongs have been activated;

[0020] In a partition-prioritized additive process, before the current layer is activated, all previous layers in the partition to which it belongs have been activated.

[0021] Preferably, the obtaining of the mandatory conditions and performing stress deformation simulation calculation on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation order are specifically as follows:

[0022] Get the number of the partition to be activated;

[0023] Obtaining a corresponding finite element mesh group according to the activated partition number, and applying an inherent strain load to the currently activated finite element mesh group;

[0024] Assemble and generate the stiffness matrix of all activated units and perform solution calculations, keep the activated mesh group in the activated state, and obtain the next partition number to be activated;

[0025] Repeat the above process until the activation calculation of all units is completed.

[0026] A second embodiment of the present invention provides an additive manufacturing partition process simulation device, comprising a finite element mesh model acquisition unit for acquiring a finite element mesh model of an additive structural part;

[0027] A finite element mesh layer generation unit, used for obtaining additive process parameters and performing layered processing on the finite element mesh model according to the process parameters to generate a finite element mesh layer for each stacking layer of the additive structure in the manufacturing process;

[0028] A finite element mesh group generating unit, used for creating a boundary curve of the additive material, and partitioning the finite element mesh layer of each stacked layer according to the boundary curve to generate a finite element mesh group corresponding to each partition;

[0029] A numbering information generating unit, used for numbering the finite element mesh groups corresponding to each partition and generating numbering information;

[0030] An activation sequence generating unit, used for obtaining a jump sequence strategy of a partitioning process of additive manufacturing, and generating an activation sequence of a finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy;

[0031] The stress-deformation simulation operation unit is used to obtain the mandatory conditions and perform stress-deformation simulation operation on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation sequence.

[0032] Preferably, the additive process parameters include: a layer height of a layered process, a number of layers of a layered process, a layered normal, a layered scanning direction, and a layered process grouping.

[0033] The third embodiment of the present invention provides an additive manufacturing partition process simulation device, including a memory and a processor, wherein the memory stores a computer program, and the computer program can be executed by the processor to implement an additive manufacturing partition process simulation method as described in any one of the above.

[0034] A fourth embodiment of the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program can be executed by a processor of a device where the computer-readable storage medium is located to implement an additive manufacturing partition process simulation method as described in any one of the above.

[0035] Based on the additive manufacturing partition process simulation method, device, and equipment-readable storage medium provided by the present invention, the finite element mesh model is first layered according to the additive process parameters to obtain the finite element mesh layer corresponding to each stacked layer in the additive manufacturing process; the obtained mesh layer is partitioned according to the additive manufacturing partition process to obtain the finite element mesh group corresponding to each partition; the mesh group corresponding to each partition is numbered and the numbering information is recorded; the activation order of the mesh group corresponding to each partition is determined according to the jump sequence strategy of the additive partition process through the numbering information; according to the activation order, the mesh group corresponding to each partition is activated in turn to perform stress and deformation simulation calculations, so as to solve and improve the problem and current situation that the results of the complex partition process of additive manufacturing in actual engineering are difficult to predict, which leads to the limitation of the application potential of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The first embodiment of the present invention provides a schematic flow chart of a method for simulating a partitioning process of additive manufacturing;

[0037] Figure 2 is a finite element mesh model of the additive structure provided by the present invention;

[0038] Figure 3 It is a schematic diagram of partition process information definition provided by the present invention;

[0039] Figure 4 It is a schematic diagram of mapping boundary information into a boundary grid set provided by the present invention;

[0040] Figure 5 It is a schematic diagram of the structure after the corresponding hierarchical grid is partitioned provided by the present invention;

[0041] Figure 6 It is a schematic diagram of the jump sequence activation execution flow provided by the present invention.

[0042] Figure 7 The second embodiment of the present invention provides a schematic diagram of a module of an additive manufacturing partition process simulation device. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0047] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0049] The "first\second" mentioned in the embodiments is only to distinguish similar objects, and does not represent a specific order for the objects. It is understandable that the "first\second" can be interchanged with the specific order or sequence where permitted. It should be understood that the objects distinguished by "first\second" can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than those illustrated or described herein.

[0050] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] The present invention discloses an additive manufacturing partitioning process simulation method, device, and equipment-readable storage medium, aiming to solve and improve the problem and current situation that the results of complex partitioning processes in additive manufacturing in actual engineering are difficult to predict, resulting in limited application potential of the process.

[0052] See also Figure 1 The first embodiment of the present invention provides an additive manufacturing partition process simulation method, which can be executed by an additive manufacturing partition process simulation device (hereinafter referred to as the simulation device), and in particular, is executed by one or more processors in the simulation device to at least implement the following steps:

[0053] S101, obtaining a finite element mesh model of the additive structure, wherein the finite element mesh model is as follows: Figure 2 As shown;

[0054] In this embodiment, the simulation device can be a terminal with data processing and analysis capabilities such as a desktop computer, a laptop computer, a server, a workstation, etc., wherein the corresponding operating system and application software can be installed in the simulation device, and the functions required by this embodiment are realized through the combination of the operating system and application software.

[0055] It should be noted that the file format of the finite element mesh model of the additive structural component may be a ".i np" file format, which may be obtained from a local database.

[0056] S102, acquiring additive process parameters, and performing layered processing on the finite element mesh model according to the process parameters to generate a finite element mesh layer for each stacking layer of the additive structure in the manufacturing process;

[0057] In this embodiment, the additive process parameters may include: a layer height of a layered process, a number of layers of a layered process, a layered normal, a layered scanning direction, and a layered process grouping;

[0058] Specifically, in this embodiment, the processing technology of the additive part defaults to unidirectional and uniform stacking along the layer normal and with uniform layer thickness, and each layer is scanned in a fixed direction.

[0059] It should be noted that each layer of the additive manufacturing part contains an independent partitioning process, such as Figure 3 As shown in Figure 1, a complete partitioning process should include partition boundary information and partition jump information. The scope of each partitioning process is only for the additive manufacturing layer to which it belongs. Therefore, in numerical simulation, the mesh model needs to be layered first.

[0060] S103, creating a boundary curve of the additive material, and partitioning the finite element mesh layer of each stacked layer according to the boundary curve to generate a finite element mesh group corresponding to each partition;

[0061] In this embodiment, the creation of the additive boundary curve is specifically: establishing a global coordinate system, and generating the boundary curve in the global coordinate system according to the expression of the boundary curve. Of course, in other embodiments, the creation of the additive boundary curve can also be: creating by setting the curve type + definition parameters of the corresponding curve type;

[0062] Either: create by picking up the geometric features of the mesh model, by selecting the continuous mesh units in space; or: automatically create based on the unit boundaries;

[0063] After the boundary information defined in the global coordinate system is created, multiple mappings can be performed to partition the grid corresponding to different layered grids with the same partition boundary, that is, different scopes, without the need to create complete boundary information for each scope independently. Figure 4 shown.

[0064] S104, numbering the finite element mesh groups corresponding to each partition and generating numbering information;

[0065] It should be noted that the partitioning process of the finite element mesh layer needs to include at least the following operation data:

[0066] A finite element mesh model is located in the global Cartesian coordinate system,

[0067] A set of finite element meshes in the global coordinate system affected by the currently set partitioning process,

[0068] A set of boundary curves defined in the global coordinate system, containing partition information, that satisfy the valid topological conditions for segmentation of the partitioned mesh.

[0069] After all the required operating data are obtained, the following calculations are required:

[0070] Map the boundary curve to the scope grid of the current partitioning process, so that the boundary information is converted into a series of grid unit number information on the partition boundary.

[0071] All grid unit numbers contained in each partition are retrieved according to the number information of the grid units on the boundary, and the corresponding relationship information between the partition number and the unit number is established and stored in a certain format.

[0072] S105, obtaining a jump sequence strategy of a partitioning process of additive manufacturing, and generating an activation sequence of a finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy;

[0073] In this embodiment, according to the jump order strategy of the additive partitioning process, the activation order of the grid groups corresponding to each partition is determined, such as Figure 5 As shown, the jump sequence strategy of the partition process defaults to a layer-priority additive process, that is, before the current partition is activated, all partitions contained in the previous layer of the layer to which it belongs must have been activated.

[0074] Specifically: In this embodiment, a queue is established;

[0075] The position of the finite element mesh group corresponding to each partition in the queue is determined according to the jump order strategy of the partition process, and the activation order of the finite element mesh group corresponding to each partition is generated according to the position.

[0076] S106, obtaining mandatory conditions, and performing stress and deformation simulation calculations on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation sequence.

[0077] In this embodiment, the mandatory conditions may include:

[0078] In a layer-priority additive process, before the current partition is activated, all partitions contained in the previous layer of the layer to which it belongs have been activated;

[0079] In a partition-prioritized additive process, before the current layer is activated, all previous layers in the partition to which it belongs have been activated.

[0080] In this embodiment, if Figure 6 As shown, according to the activation order, the grid groups corresponding to each partition are activated in turn to perform stress and deformation simulation calculations.

[0081] Specifically, in this embodiment:

[0082] Get the number of the partition to be activated;

[0083] Obtaining a corresponding finite element mesh group according to the activated partition number, and applying an inherent strain load to the currently activated finite element mesh group;

[0084] Assemble and generate the stiffness matrix of all activated units and perform solution calculations, keep the activated mesh group in the activated state, and obtain the next partition number to be activated;

[0085] Repeat the above process until the activation calculation of all units is completed.

[0086] It should be noted that, in this embodiment, the specific requirements for activating the sequential queue may include:

[0087] The activation order queue must contain grid groups covering all partitions;

[0088] Each partitioned grid group can appear only once in the activation order queue;

[0089] The non-empty elements of the queue must be compact, that is, no empty elements are allowed between non-empty elements;

[0090] Among them, in addition to determining the activation order of each partition, the jump strategy also needs to set the time interval for jumping between partitions. Of course, the jump sequence strategy of the partition process, in addition to being defined according to the specific partition process, needs to be forced to meet certain conditions based on objective reality.

[0091] In summary, the above embodiments expand the process coverage of additive manufacturing numerical simulation by supporting parameter setting interfaces for various forms of additive partitioning processes. Through the mapping and conversion of partition boundary information on the grid unit scope and the sequential activation calculation of the units, the dynamic change process of the additive partitioning process can be accurately reproduced, reflecting the scientific nature of the welding numerical simulation method.

[0092] See also Figure 7 A second embodiment of the present invention provides an additive manufacturing partition process simulation device, comprising:

[0093] A finite element mesh model acquisition unit 201 is used to acquire a finite element mesh model of an additive structure;

[0094] A finite element mesh layer generation unit 202 is used to obtain additive process parameters and perform layered processing on the finite element mesh model according to the process parameters to generate a finite element mesh layer for each stacking layer of the additive structure in the manufacturing process;

[0095] The finite element mesh group generating unit 203 is used to create a boundary curve of the additive material, and partition the finite element mesh layer of each stacked layer according to the boundary curve to generate a finite element mesh group corresponding to each partition;

[0096] A numbering information generating unit 204 is used to number the finite element mesh groups corresponding to each partition and generate numbering information;

[0097] An activation sequence generating unit 205 is used to obtain a jump sequence strategy of a partitioning process of additive manufacturing, and to generate an activation sequence of a finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy;

[0098] The stress-deformation simulation operation unit 206 is used to obtain the mandatory conditions and perform stress-deformation simulation operation on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation sequence.

[0099] Preferably, the additive process parameters include: a layer height of a layered process, a number of layers of a layered process, a layered normal, a layered scanning direction, and a layered process grouping.

[0100] The third embodiment of the present invention provides an additive manufacturing partition process simulation device, including a memory and a processor, wherein the memory stores a computer program, and the computer program can be executed by the processor to implement an additive manufacturing partition process simulation method as described in any one of the above.

[0101] A fourth embodiment of the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program can be executed by a processor of a device where the computer-readable storage medium is located to implement an additive manufacturing partition process simulation method as described in any one of the above.

[0102] Based on the additive manufacturing partition process simulation method, device, and equipment-readable storage medium provided by the present invention, the finite element mesh model is first layered according to the additive process parameters to obtain the finite element mesh layer corresponding to each stacked layer in the additive manufacturing process; the obtained mesh layer is partitioned according to the additive manufacturing partition process to obtain the finite element mesh group corresponding to each partition; the mesh group corresponding to each partition is numbered and the numbering information is recorded; the activation order of the mesh group corresponding to each partition is determined according to the jump sequence strategy of the additive partition process through the numbering information; according to the activation order, the mesh group corresponding to each partition is activated in turn to perform stress and deformation simulation calculations, so as to solve and improve the problem and current situation that the results of the complex partition process of additive manufacturing in actual engineering are difficult to predict, which leads to the limitation of the application potential of the process.

[0103] Exemplarily, the computer program described in the third and fourth embodiments of the present invention may be divided into one or more modules, and the one or more modules are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the device for implementing an additive manufacturing partition process simulation. For example, the device described in the second embodiment of the present invention.

[0104] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the method for simulating the partitioning process of additive manufacturing, and uses various interfaces and lines to connect the various parts of the method for simulating the partitioning process of additive manufacturing.

[0105] The memory can be used to store the computer program and / or module, and the processor realizes various functions of an additive manufacturing partition process simulation method by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, a text conversion function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, text message data, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Med ia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0106] Wherein, if the implemented module is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0107] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0108] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for simulating a partitioning process of additive manufacturing, characterized in that: include: Obtain the finite element mesh model of the additive structure; Acquiring additive process parameters, and performing layered processing on the finite element mesh model according to the process parameters to generate a finite element mesh layer for each stacking layer of the additive structure in the manufacturing process; Creating a boundary curve of the additive material, and partitioning the finite element mesh layer of each stacked layer according to the boundary curve to generate a finite element mesh group corresponding to each partition; Numbering the finite element mesh groups corresponding to each partition and generating numbering information; Acquire a jump sequence strategy of a partitioning process of additive manufacturing, and generate an activation sequence of a finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy; Obtain mandatory conditions, and perform stress and deformation simulation operations on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation sequence.

2. The method for simulating a partitioning process of additive manufacturing according to claim 1, characterized in that: The additive process parameters include: a layer height of a layered process, a number of layers of a layered process, a layered normal, a layered scanning direction, and a layered process grouping.

3. The method for simulating a partitioning process of additive manufacturing according to claim 1, characterized in that: The boundary curve for creating the additive material is specifically: A global coordinate system is established, and a boundary curve is generated in the global coordinate system according to an expression of the boundary curve.

4. The method for simulating a partitioning process of additive manufacturing according to claim 1, characterized in that: The jump sequence strategy for obtaining the partition process of the additive manufacturing process generates the activation sequence of the finite element mesh group corresponding to each partition according to the numbering information and the jump sequence strategy, specifically: Create a queue; The position of the finite element mesh group corresponding to each partition in the queue is determined according to the jump order strategy of the partition process, and the activation order of the finite element mesh group corresponding to each partition is generated according to the position.

5. The method for simulating a partitioning process of additive manufacturing according to claim 1, characterized in that: The mandatory conditions include: In a layer-priority additive process, before the current partition is activated, all partitions contained in the previous layer of the layer to which it belongs have been activated; In a partition-prioritized additive process, before the current layer is activated, all previous layers in the partition to which it belongs have been activated.

6. The method for simulating a partitioning process of additive manufacturing according to claim 1, characterized in that: The obtaining of the mandatory conditions and performing stress and deformation simulation calculations on the finite element mesh group corresponding to each partition according to the mandatory conditions and the activation order are specifically as follows: Get the number of the partition to be activated; Obtaining a corresponding finite element mesh group according to the activated partition number, and applying an inherent strain load to the currently activated finite element mesh group; Assemble and generate the stiffness matrix of all activated units and perform solution calculations, keep the activated mesh group in the activated state, and obtain the next partition number to be activated; Repeat the above process until the activation calculation of all units is completed.

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