Stress simulation method, device, equipment and storage medium for main bearing of shield machine

Abstract

The present application proposes a stress simulation method, device, equipment and storage medium for a shield machine main bearing, wherein the method comprises: establishing a three-dimensional model of the shield machine main bearing; wherein the three-dimensional model comprises an outer ring model, an inner ring model, a retaining frame model and a roller sub-model; performing finite element meshing based on the three-dimensional model to obtain a finite element mesh model corresponding to the shield machine main bearing; obtaining material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing; performing stress simulation based on the finite element mesh model, the material property information, the contact conditions, the load conditions and the boundary conditions to obtain stress simulation results. Through the technical solution of the present application, the efficiency of stress analysis of the shield machine main bearing can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and in particular to a stress simulation method, device, equipment and storage medium for a main bearing of a shield machine. Background Art

[0002] In the related art, when performing stress simulation on the main bearing of a shield machine, it is necessary to accurately model the bearing to obtain various characteristics and geometric details, which is relatively complicated in actual operation. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] In the first aspect, the present application proposes a stress simulation method for a shield machine main bearing, the method comprising: establishing a three-dimensional model of the shield machine main bearing; wherein the three-dimensional model comprises an outer ring model, an inner ring model, a retaining frame model and a roller sub-model; performing finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the shield machine main bearing; obtaining material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing; performing stress simulation based on the finite element mesh model, the material property information, the contact conditions, the load conditions and the boundary conditions to obtain a stress simulation result.

[0005] In one implementation, the finite element meshing is performed based on the three-dimensional model to obtain the finite element mesh model corresponding to the main bearing of the shield machine, including: determining the contact area between the outer ring model, the inner ring model, the retaining frame model and the roller sub-model; based on the contact area, respectively setting the source surface, target surface and sweeping path corresponding to the outer ring model, the inner ring model, the retaining frame model and the roller model; performing finite element meshing on each of the sub-models based on the source surface, the target surface and the sweeping path corresponding to each of the sub-models to obtain the finite element mesh model.

[0006] In one implementation, the contact condition includes a preset static friction coefficient and a preset dynamic friction coefficient.

[0007] In an optional implementation, the stress simulation is performed based on the finite element mesh model, the material property information, the contact conditions, the load conditions and the boundary conditions to obtain the stress simulation result, including: performing stress simulation based on the finite element mesh model, the material property information, the static friction coefficient, the load conditions and the boundary conditions to obtain a first stress simulation result of a preset roller node under a first working condition; performing stress simulation based on the finite element mesh model, the material property information, the dynamic friction coefficient, the load conditions and the boundary conditions to obtain a second stress simulation result of the roller node under a second working condition.

[0008] In one implementation, the load condition includes a gravity load and a radial load of a preset magnitude.

[0009] In one implementation, the boundary condition includes fixing the degree of freedom of the outer ring surface along a preset direction.

[0010] In the second aspect, the present application proposes a stress simulation device for a shield machine main bearing, the device comprising: a first processing module, used to establish a three-dimensional model of the shield machine main bearing; wherein the three-dimensional model comprises an outer circle model, an inner circle model, a retaining frame model and a roller sub-model; a second processing module, used to perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the shield machine main bearing; an acquisition module, used to obtain material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing; a simulation module, used to perform stress simulation based on the finite element mesh model, the material property information, the contact conditions, the load conditions and the boundary conditions to obtain stress simulation results.

[0011] In one implementation, the second processing module can be used to: determine the contact area between the outer ring model, the inner ring model, the retaining frame model and the roller sub-model; based on the contact area, respectively set the source surface, target surface and sweeping path corresponding to the outer ring model, the inner ring model, the retaining frame model and the roller model; perform finite element mesh division on each of the sub-models based on the source surface, the target surface and the sweeping path corresponding to each of the sub-models to obtain the finite element mesh model.

[0012] In one implementation, the contact condition includes a preset static friction coefficient and a preset dynamic friction coefficient.

[0013] In an optional implementation, the simulation module can be used to: perform stress simulation based on the finite element mesh model, the material property information, the static friction coefficient, load conditions and boundary conditions to obtain a first stress simulation result of a preset roller node under a first working condition; perform stress simulation based on the finite element mesh model, the material property information, the dynamic friction coefficient, load conditions and boundary conditions to obtain a second stress simulation result of the roller node under a second working condition.

[0014] In one implementation, the load condition includes a gravity load and a radial load of a preset magnitude.

[0015] In one implementation, the boundary condition includes fixing the degree of freedom of the outer ring surface along a preset direction.

[0016] In a third aspect, the present application proposes 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 stress simulation method for the main bearing of a shield machine as described in the first aspect.

[0017] In a fourth aspect, the present application proposes a computer-readable storage medium for storing instructions, which, when executed, enables the method described in the first aspect to be implemented.

[0018] In a fifth aspect, the present application proposes a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the stress simulation method for a main bearing of a shield machine as described in the first aspect.

[0019] The stress simulation method, device, equipment and storage medium of the shield machine main bearing provided in the present application can mesh the three-dimensional model of the shield machine main bearing to obtain a finite element mesh model, thereby performing stress simulation based on the finite element mesh model and the material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing to obtain stress simulation results. It is convenient to perform stress analysis on the shield machine main bearing based on the stress simulation results.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1It is a schematic flow chart of a stress simulation method for a main bearing of a shield machine provided in an embodiment of the present application;

[0023] Figure 2 This is an example diagram of a three-dimensional model of a shield machine main bearing according to an embodiment of the present application;

[0024] Figure 3 It is a flow chart of another stress simulation method for a main bearing of a shield machine provided in an embodiment of the present application;

[0025] Figure 4 It is a flow chart of another stress simulation method for a main bearing of a shield machine provided in an embodiment of the present application;

[0026] Figure 5 It is a schematic diagram of a roller node provided in an embodiment of the present application;

[0027] Figure 6 It is a schematic diagram of stress simulation results of a roller node provided in an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of stress simulation results of another roller node provided in an embodiment of the present application;

[0029] Figure 8 It is a structural schematic diagram of a stress simulation device for a main bearing of a shield machine provided in an embodiment of the present application;

[0030] Fig. 9 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes the stress simulation method and device of the main bearing of a shield machine according to an embodiment of the present application with reference to the accompanying drawings.

[0033] Figure 1 1 is a schematic flow chart of a stress simulation method for a shield machine main bearing provided in an embodiment of the present application. Figure 1 As shown, the method may include but is not limited to the following steps:

[0034] Step S101: Establish a three-dimensional model of the main bearing of the shield machine.

[0035] The three-dimensional model includes an outer ring model, an inner ring model, a cage model and a roller model.

[0036] Exemplarily, a three-dimensional model of the shield machine main bearing is established by using three-dimensional modeling software (eg, Solidworks).

[0037] As an example, see Figure 2 , Figure 2 This is an example diagram of a three-dimensional model of a shield machine main bearing according to an embodiment of the present application.

[0038] It should be noted that, for the convenience of subsequent calculations, the chamfers, transition arcs and steps on the bearing structure in the shield machine main bearing have little effect on the contact stress and deformation inside the bearing, so they can be ignored during modeling. And the focus of stress simulation of the shield machine main bearing is on the raceway and rollers, so multiple outer rings can be merged into one during modeling.

[0039] It should be noted that, in the embodiments of the present application, the shield machine main bearing may be a three-row cylindrical roller shield machine main bearing.

[0040] Step S102: Perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine.

[0041] Exemplarily, the three-dimensional model of the shield machine main bearing is input into the simulation software through a standard graphic input interface to obtain a finite element mesh model corresponding to the shield machine main bearing.

[0042] Step S103: Obtaining material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine.

[0043] Exemplarily, the material property information of each part of the shield machine main bearing, such as the outer ring, inner ring, cage, roller, etc., as well as the pre-set contact conditions, load conditions and boundary conditions are obtained.

[0044] Step S104: performing stress simulation based on the finite element mesh model, material property information, contact conditions, load conditions and boundary conditions to obtain stress simulation results.

[0045] Exemplarily, a finite element mesh model is set based on a finite element mesh model, material property information, contact conditions, load conditions and boundary conditions, and a stress simulation calculation is performed based on the set finite element mesh model to obtain a stress simulation result.

[0046] By implementing the embodiment of the present application, the three-dimensional model of the shield machine main bearing can be meshed to obtain a finite element mesh model, thereby performing stress simulation based on the finite element mesh model and the material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing to obtain stress simulation results. It is convenient to perform stress analysis on the shield machine main bearing based on the stress simulation results.

[0047] In one implementation, finite element meshing can be performed on each part of the three-dimensional model to obtain a finite element mesh model corresponding to the three-dimensional model. Figure 3 FIG. 1 is a flow chart of another stress simulation method for a main bearing of a shield machine provided in an embodiment of the present application. Figure 3 As shown, the method may include but is not limited to the following steps:

[0048] Step S301: Establish a three-dimensional model of the main bearing of the shield machine.

[0049] In the embodiments of the present application, step S301 can be implemented in any of the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0050] Step S302: Determine the contact area between the outer circle model, the inner circle model, the retaining frame model and the roller sub-model.

[0051] Step S303: Based on the contact area, the source surface, target surface and scanning path corresponding to the outer circle model, the inner circle model, the retaining frame model and the roller model are respectively set.

[0052] Exemplarily, the area of ​​each sub-model that contacts other sub-models is used as the source surface, and the other surface opposite to the source surface is set as the target surface, so that the sweep path corresponding to each sub-model is set based on the source surface and the target surface of each sub-model.

[0053] Step S304: performing finite element mesh division on each sub-model based on the source surface, target surface and sweep path corresponding to each sub-model to obtain a finite element mesh model.

[0054] Exemplarily, finite element meshing is performed on each sub-model based on the source surface, target surface and sweeping path corresponding to each sub-model to obtain a partial finite element mesh model corresponding to each sub-model, and the partial finite element mesh models corresponding to each sub-model are combined to obtain a finite element mesh model corresponding to the main bearing of the shield machine.

[0055] Step S305: Obtain material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine.

[0056] In the embodiments of the present application, step S305 can be implemented in any of the ways in the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0057] Step S306: Perform stress simulation based on the finite element mesh model, material property information, contact conditions, load conditions and boundary conditions to obtain stress simulation results.

[0058] In the embodiments of the present application, step S306 can be implemented in any of the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0059] By implementing the embodiment of the present application, the three-dimensional model of the shield machine main bearing can be meshed to obtain a finite element mesh model, thereby performing stress simulation based on the finite element mesh model and the material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing to obtain stress simulation results. It is convenient to perform stress analysis on the shield machine main bearing based on the stress simulation results.

[0060] In one implementation, stress simulation can be performed under different contact conditions to obtain stress simulation results of the shield machine main bearing under different working conditions. As an example, see Figure 4 , Figure 4 FIG. 1 is a flow chart of another stress simulation method for a main bearing of a shield machine provided in an embodiment of the present application. Figure 4 As shown, the method may include but is not limited to the following steps:

[0061] Step S401: Establish a three-dimensional model of the shield machine main bearing.

[0062] In the embodiments of the present application, step S401 can be implemented by any of the methods in the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0063] Step S402: Perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine.

[0064] In the embodiments of the present application, step S402 can be implemented by any of the methods in the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0065] Step S403: Obtain material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine.

[0066] In the embodiments of the present application, step S403 can be implemented by any of the methods in the embodiments of the present application, and the embodiments of the present application do not limit this and will not be described in detail.

[0067] Step S404: performing stress simulation based on the finite element mesh model, material property information, static friction coefficient, load conditions and boundary conditions to obtain a first stress simulation result of a preset roller node under a first working condition.

[0068] The first working condition is a working condition in which the roller rolls normally.

[0069] Exemplarily, the static friction coefficient may be 0.2.

[0070] Exemplarily, material property information, static friction coefficient and boundary conditions are set for the finite element mesh model, and load conditions are applied. Then, the finite element mesh model is solved and calculated using the central difference method to obtain the first stress simulation result.

[0071] As an example, please refer to Table 1, which is a material parameter table of a main bearing finite element model provided in an embodiment of the present application.

[0072] Table 1 Main bearing finite element model material parameters

[0073]

[0074] As an example, see Figure 5 , Figure 5 This is a schematic diagram of a roller node provided in an embodiment of the present application.

[0075] As an example, see Figure 6 , Figure 6 Schematic diagram of stress simulation results of a roller node provided in an embodiment of the present application. Figure 6 As shown in the figure above, it can be seen that the stress has a peak at time 0, because the node just contacts the outer ring raceway at this time, and then the roller rotates, the node is no longer in contact with the outer ring, and the stress value drops sharply. Then, at about 2.2e-2s, the stress reaches a peak again, and the node just contacts the inner ring raceway. As can be seen from the figure, the stress on a node of the roller changes cyclically, and only when it contacts the inner and outer ring raceways will the stress be large. At other times, due to no contact, the stress value is close to 0Mpa.

[0076] It should be noted that, for the convenience of simulation calculation, the influence of cage, seal ring, fixing screw, axial direction, clearance and lubrication on the analysis process can be ignored; and there are too many mesh contacts in the finite element mesh model. If three rows of rollers are considered at the same time, the calculation amount is large, so only one row of radial rollers can be considered during stress simulation.

[0077] Step S405: Perform stress simulation based on the finite element mesh model, material property information, dynamic friction coefficient, load conditions and boundary conditions to obtain a second stress simulation result of the roller node under the second working condition.

[0078] The second working condition mentioned above is a working condition where the roller is stuck.

[0079] Exemplarily, the above-mentioned dynamic friction coefficient may be 0.1.

[0080] Exemplarily, material property information, dynamic friction coefficient and boundary conditions are set for the finite element mesh model, and load conditions are applied. Then, the finite element mesh model is solved and calculated using the central difference method to obtain the first stress simulation result.

[0081] As an example, see Figure 7 , Figure 7 It is a schematic diagram of stress simulation results of another roller node provided in the embodiment of the present application. After the inner ring speed reaches stability, the stress on the roller node in the stuck state is always at a high position, about 700MPa, and the stress of the node does not present a reciprocating cycle like a normal roller. The stress value only has a small fluctuation after reaching stability, and is significantly higher than the maximum stress of 511.08Mpa under normal roller rotation. Therefore, it is inferred that in actual working conditions, if the shield machine main bearing enters mud and sand and other reasons cause the roller to get stuck due to a failure, then under the push of the cage, the stuck roller will continue to generate a large stress value at the place where it contacts the inner and outer rings, thereby accelerating the wear of the roller, and then causing the entire bearing to fail.

[0082] By implementing the embodiments of the present application, stress simulation can be performed based on different contact conditions to obtain stress simulation results of the shield machine main bearing under different working conditions, which facilitates safety assessment based on stress simulation results under different working conditions.

[0083] In some embodiments, the aforementioned load conditions include a gravity load and a radial load of a predetermined magnitude.

[0084] Exemplary loading conditions include gravity in the negative Z direction and a radial force of 100,000 N.

[0085] In some embodiments, the aforementioned boundary conditions include fixing the degree of freedom of the outer ring surface along a preset direction.

[0086] Exemplarily, the outer ring surface has six degrees of freedom in the positive direction of the X-axis, the negative direction of the X-axis, the positive direction of the Y-axis, the negative direction of the Y-axis, the positive direction of the Z-axis, and the negative direction of the Z-axis.

[0087] See also Figure 8 , Figure 8 Schematic diagram of the structure of a stress simulation device for a main bearing of a shield machine provided in an embodiment of the present application. Figure 8As shown, the device 800 includes: a first processing module 801, which is used to establish a three-dimensional model of the main bearing of the shield machine; wherein the three-dimensional model includes an outer circle model, an inner circle model, a retaining frame model and a roller sub-model; a second processing module 802, which is used to perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine; an acquisition module 803, which is used to obtain material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine; a simulation module 804, which is used to perform stress simulation based on the finite element mesh model, material property information, contact conditions, load conditions and boundary conditions to obtain stress simulation results.

[0088] In one implementation, the second processing module 802 can be used to: determine the contact area between the outer circle model, the inner circle model, the retaining frame model and the roller sub-model; based on the contact area, respectively set the source surface, target surface and sweeping path corresponding to the outer circle model, the inner circle model, the retaining frame model and the roller model; perform finite element mesh division on each sub-model based on the source surface, target surface and sweeping path corresponding to each sub-model, to obtain a finite element mesh model.

[0089] In one implementation, the contact condition includes a preset static friction coefficient and a preset dynamic friction coefficient.

[0090] In an optional implementation, the simulation module 804 can be used to: perform stress simulation based on a finite element mesh model, material property information, static friction coefficient, load conditions and boundary conditions to obtain a first stress simulation result of a preset roller node under a first working condition; perform stress simulation based on a finite element mesh model, material property information, dynamic friction coefficient, load conditions and boundary conditions to obtain a second stress simulation result of the roller node under a second working condition.

[0091] In one implementation, the load condition includes a gravity load and a radial load of a preset magnitude.

[0092] In one implementation, the boundary condition includes fixing the degree of freedom of the outer ring surface along a preset direction.

[0093] Through the device of the embodiment of the present application, the three-dimensional model of the shield machine main bearing can be meshed to obtain a finite element mesh model, thereby performing stress simulation based on the finite element mesh model and the material property information, contact conditions, load conditions and boundary conditions of the shield machine main bearing to obtain stress simulation results. It is convenient to perform stress analysis on the shield machine main bearing based on the stress simulation results.

[0094] It should be noted that the above explanation of the embodiment of the stress simulation method for the main bearing of a shield machine is also applicable to the stress simulation device for the main bearing of a shield machine of this embodiment, and will not be repeated here.

[0095] In order to implement the above embodiment, the present application also proposes an electronic device. Fig. 9 , Fig. 9 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Fig. 9 As shown, the electronic device 900 includes: a processor 901, and a memory 902 communicatively connected to the processor 901; the memory 902 stores computer-executable instructions; the processor 901 executes the computer-executable instructions stored in the memory to implement the method provided in the aforementioned embodiment.

[0096] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0097] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0098] In the description of this application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0099] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0101] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0102] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0103] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0104] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0105] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0106] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A stress simulation method for a shield machine main bearing, characterized in that: include: Establishing a three-dimensional model of the shield machine main bearing; wherein the three-dimensional model includes an outer ring model, an inner ring model, a cage model and a roller sub-model; Perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine; Obtaining material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine; Stress simulation is performed based on the finite element mesh model, the material property information, the contact condition, the load condition and the boundary condition to obtain a stress simulation result.

2. The method according to claim 1, characterized in that The finite element mesh division is performed based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine, including: Determining contact areas among the outer race model, the inner race model, the cage sub-model and the roller sub-model; Based on the contact area, respectively setting the source surface, the target surface and the sweep path corresponding to the outer ring model, the inner ring model, the cage model and the roller model; Based on the source surface, the target surface and the sweeping path corresponding to each sub-model, finite element mesh division is performed on each sub-model to obtain the finite element mesh model.

3. The method according to claim 1, characterized in that The contact condition includes a preset static friction coefficient and a preset dynamic friction coefficient.

4. The method according to claim 3, characterized in that The performing stress simulation based on the finite element mesh model, the material property information, the contact condition, the load condition and the boundary condition to obtain the stress simulation result includes: Perform stress simulation based on the finite element mesh model, the material property information, the static friction coefficient, the load condition and the boundary condition to obtain a first stress simulation result of a preset roller node under a first working condition; Stress simulation is performed based on the finite element mesh model, the material property information, the dynamic friction coefficient, load conditions and boundary conditions to obtain a second stress simulation result of the roller node under a second working condition.

5. The method according to any one of claims 1 to 4, characterized in that: The load conditions include a gravity load and a radial load of a predetermined magnitude.

6. The method according to any one of claims 1 to 4, characterized in that: The boundary condition includes fixing the degree of freedom of the outer ring surface along a preset direction.

7. A stress simulation device for a main bearing of a shield machine, characterized in that: include: The first processing module is used to establish a three-dimensional model of the shield machine main bearing; wherein the three-dimensional model includes an outer ring model, an inner ring model, a retaining frame model and a roller sub-model. A second processing module is used to perform finite element mesh division based on the three-dimensional model to obtain a finite element mesh model corresponding to the main bearing of the shield machine; An acquisition module, used to acquire material property information, contact conditions, load conditions and boundary conditions of the main bearing of the shield machine; The simulation module is used to perform stress simulation based on the finite element mesh model, the material property information, the contact conditions, the load conditions and the boundary conditions to obtain stress simulation results.

8. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises a computer program, which, when executed by a processor, implements the steps of the stress simulation method for a main bearing of a shield machine as claimed in any one of claims 1 to 6.

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