A cooling liquid kettle creep analysis method based on finite elements, computer equipment and computer readable storage medium

Abstract

The application provides a cooling liquid kettle creep analysis method based on finite elements, computer equipment and a computer readable storage medium, and is applied to the field of materials. The method comprises the following steps: dividing a two-dimensional grid for each component of the cooling liquid kettle; setting material and thickness information for each component; setting a load boundary for each component; setting a convective heat transfer coefficient and a temperature for components to be subjected to convective heat transfer; and performing creep calculation on each component based on finite element analysis.

Description

Technical Field

[0001] This invention relates to the field of materials, and more specifically to the field of material creep. Background Technology

[0002] The importance of the coolant reservoir is self-evident for both traditional and new energy vehicles. The coolant stored in the reservoir is crucial to the vehicle's powertrain cooling system. Its cooling effect directly affects the efficiency of the entire powertrain and even the vehicle's overall safety. If the coolant reservoir cracks and leaks, it poses a significant danger to both the vehicle and the user.

[0003] As a solid material, coolant reservoirs exhibit creep during use. That is, under constant stress, the strain increases over time. This phenomenon must be rigorously considered in the design of coolant reservoirs. Therefore, creep analysis of coolant reservoirs is essential.

[0004] In vehicle development, creep analysis of coolant reservoirs plays a crucial guiding role in the structural design of components. However, due to the influence of structural layout and overall vehicle performance requirements, creep analysis of coolant reservoirs often requires numerous iterations during vehicle development. If such creep analysis is performed using existing technologies, such as through reservoir reliability bench testing, the workload is substantial. Summary of the Invention

[0005] To address or at least alleviate one or more of the above problems, the following technical solutions are provided.

[0006] According to one aspect of the present invention, a method for creep analysis of coolant reservoirs based on the finite element method is provided, the method comprising:

[0007] Each component of the coolant reservoir is divided into a two-dimensional grid;

[0008] Set material and thickness information for each component;

[0009] Set load boundaries for each component;

[0010] Set the convective heat transfer coefficient and temperature for components requiring convective heat transfer; and

[0011] Creep calculations were performed on each component based on finite element analysis.

[0012] Optionally, the divided two-dimensional grid includes triangular grids and quadrilateral grids.

[0013] Optionally, the finite element method for coolant reservoir creep analysis also includes adjusting the normal of the divided two-dimensional mesh to be consistent with the load application surface.

[0014] Optionally, the coolant reservoir components include an upper reservoir body, a lower reservoir body, upper reservoir body reinforcing ribs, lower reservoir body reinforcing ribs, upper reservoir body lifting lugs, lower reservoir body lifting lugs, and an exhaust port.

[0015] Optionally, setting the load boundary includes setting a basic load, internal surface pressure, and / or displacement constraints.

[0016] Optionally, the basic load includes low-temperature immersion temperature, high-temperature immersion temperature, initial temperature, creep time, post-creep temperature rise time, post-creep temperature rise holding time, post-creep cooling time, temperature rise temperature, and cooling temperature.

[0017] Optionally, the convective heat transfer coefficient and temperature include low-temperature immersion convective coefficient, high-temperature immersion convective coefficient, coupled operating condition convective coefficient, creep operating condition temperature rise convective coefficient, creep operating condition temperature drop convective coefficient, coupled operating condition ambient temperature, creep operating condition temperature rise ambient temperature, and creep operating condition temperature drop ambient temperature.

[0018] Optionally, the creep analysis is based on ABAQUS finite element analysis.

[0019] According to another aspect of the present invention, a computer device is provided. The computer device includes a processor and a memory. When a computer program stored in the memory is run on the processor, the above-described finite element-based method for coolant reservoir creep analysis is implemented.

[0020] According to another aspect of the present invention, a computer-readable storage medium is provided. This computer-readable storage medium stores a computer program. When the computer program is run on a processor, the above-described finite element-based method for coolant reservoir creep analysis is implemented.

[0021] According to the technical solution of the present invention, the creep calculation of automotive coolant reservoirs is realized through finite element analysis, which greatly improves work efficiency and reduces time and labor costs. Attached Figure Description

[0022] The above and other objects and advantages of the present invention will become more fully clear from the following detailed description taken in conjunction with the accompanying drawings.

[0023] Figure 1 and Figure 2 A perspective view of a portion of the coolant reservoir according to an embodiment of the present invention is shown.

[0024] Figure 3 A flowchart 30 illustrates a finite element-based method for creep analysis of coolant reservoirs according to an embodiment of the present invention.

[0025] Figure 4A block diagram of a computer device 40 for implementing a finite element-based method for creep analysis of coolant reservoirs is shown according to an embodiment of the present invention. Detailed Implementation

[0026] It should be understood that the term "vehicle" or other similar terms used herein include motor vehicles in general, such as passenger cars (including SUVs, buses, trucks, etc.), various commercial vehicles, ships, aircraft, etc., and includes hybrid electric vehicles, electric vehicles, plug-in hybrid electric vehicles, etc. A hybrid electric vehicle is a vehicle with two or more power sources, such as a gasoline-powered and an electric vehicle.

[0027] It should also be noted that the term "comprising" and similar expressions in the specification and claims of this invention are intended to indicate non-exclusive inclusion unless otherwise specifically indicated.

[0028] In the following, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] Figure 1 and Figure 2 Perspective views of portions of a coolant reservoir according to an embodiment of the present invention are shown. Generally, the coolant reservoir may include the components shown in Table 1. It should be noted that the coolant reservoir is not limited to including only the above components or necessarily includes all of them. Figure 1 The coolant reservoir shown includes an upper reservoir body 101, an upper reservoir body lug 102, a lower reservoir body 103, lower reservoir body lugs 104 and 105, and a vent 106. Additionally, [the text abruptly ends here, likely due to an incomplete sentence or missing information]. Figure 2 As can be seen, the coolant reservoir also includes an upper reservoir body reinforcing rib 201 and a lower reservoir body reinforcing rib 202.

[0030] Table 1 List of Coolant Reservoir Components

[0031]

[0032] like Figure 3 As shown, the flowchart 30 of the finite element method for coolant reservoir creep analysis according to an embodiment of the present invention includes step S301, dividing each component in the coolant reservoir into a two-dimensional mesh. Specifically, the various components of the coolant reservoir can be divided into triangular meshes and quadrilateral meshes. For example, the triangular mesh is designated as S3RT, and the quadrilateral mesh is designated as S4RT, and this type setting is assigned to all meshes. It should be noted that the normals of the pressure-bearing meshes need to be adjusted to be consistent; generally, the normals face inwards to ensure that the internal components are under pressure.

[0033] Then, all meshes can be grouped into components, meaning meshes belonging to the same component are grouped together, allowing for subsequent specification of properties such as thickness and material for different components. Custom grouping operations can also be performed as needed. Furthermore, pressure surfaces and convection surfaces can be grouped. Optionally, the normal surface of the 2D mesh is used as the application surface by default. If the normal of the 2D mesh is not consistent with the load application surface, then they need to be adjusted to be consistent.

[0034] Furthermore, the meshes at structural intersections can be set as element sets. This is because the creep equivalents at these intersections need to be checked in subsequent creep analyses. Additionally, nodes with displacement constraints can be set as displacement-constrained node sets, and nodes with initial temperatures can be set as initial-temperature node sets. Here, nodes are simply the endpoints of each two-dimensional mesh. Furthermore, an empty material can be defined. This is because actual material data can be set in subsequent finite element analysis software (such as ABAQUS); here, only an empty material needs to be created to assign properties to the mesh, thereby outputting a valid initial model. After defining the empty material, properties can be defined, specifying the material as the previously set empty material, and assigning these properties to all components. These steps can be performed in preprocessing software, and after completing these steps, the coolant reservoir model can be exported in the format required by subsequent finite element analysis software (such as ABAQUS).

[0035] Next, in step S302, material and thickness information is set for each component of the coolant reservoir. In step S303, load boundaries are set for each component of the coolant reservoir. Optionally, setting load boundaries includes setting basic loads, internal surface pressure, displacement constraints, etc. The basic loads include: low-temperature immersion temperature, high-temperature immersion temperature, initial temperature, creep time, post-creep temperature rise time, post-creep temperature rise holding time, post-creep cooling time, temperature rise, and temperature drop. Setting the internal surface pressure mainly assigns pressure values ​​to the pressure-bearing components in the coolant reservoir. Setting displacement constraints generally includes displacement and rotation angles in the X, Y, and Z directions, for a total of six degrees of freedom.

[0036] In step S304, the convective heat transfer coefficient and temperature are set for the components to be subjected to convective heat transfer. This step may include setting the following parameters: the convective heat transfer coefficient and temperature include the low-temperature immersion convective coefficient, the high-temperature immersion convective coefficient, the coupled operating condition convective coefficient, the creep operating condition temperature rise convective coefficient, the creep operating condition temperature drop convective coefficient, the coupled operating condition ambient temperature, the creep operating condition temperature rise ambient temperature, and the creep operating condition temperature drop ambient temperature.

[0037] In step S305, creep calculations are performed on each component based on finite element analysis. This step can be completed using software such as ABAQUS or ANSYS. Check if the calculation results converge: if converged, record the results and generate an analysis report; if not converged, reset the calculation model and parameters.

[0038] It is evident that the finite element method-based creep analysis of coolant reservoirs enables automated creep calculation of automotive coolant reservoirs, greatly improving work efficiency and significantly reducing time and labor costs.

[0039] Figure 4 This is a block diagram of a computer device 40 for implementing a finite element method for creep analysis of coolant reservoirs according to an embodiment of the present invention. The computer device 40 includes a memory 401 and a processor 402. Although not shown in... Figure 2 As shown, however, computer device 40 also includes a computer program stored in memory 401 and executable on processor 402, thereby implementing the various steps of the finite element-based coolant reservoir creep analysis method. Processor 402 may be a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, etc.

[0040] The present invention also provides a computer-readable medium having a computer program stored thereon. When executed by a processor, the computer program implements the above-described finite element-based method for creep analysis of coolant reservoirs.

[0041] It should be noted that in some alternative embodiments, the functions / steps included in the method may not occur in the order shown in the flowchart. For example, two functions / steps shown sequentially may be executed substantially simultaneously or even in reverse order. This depends specifically on the functions / steps involved.

[0042] Furthermore, the elements disclosed and described herein (including steps in the accompanying drawings, etc.) refer to logical boundaries between elements. However, according to software or hardware engineering practice, the described elements and functions can be executed on a machine via a computer-executable medium. A computer-executable medium has a processor capable of executing program instructions stored thereon. These program instructions may be as a monolithic software architecture, as a standalone software module, or as a module using external programs, code, services, etc., or any combination thereof, and all such execution schemes may fall within the scope of this disclosure.

[0043] While only some embodiments of the invention have been described above, those skilled in the art will understand that the invention can be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments shown are to be considered illustrative rather than restrictive, and the invention may encompass various modifications and substitutions without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for creep analysis of coolant reservoirs based on the finite element method, characterized in that, include: Divide each component of the coolant reservoir into a two-dimensional grid; Adjust the normal of the divided two-dimensional mesh to be consistent with the load application surface; The two-dimensional grid at the intersection of each component is used to create a first unit set; Set material and thickness information for each component; Set load boundaries for each component; Set the convective heat transfer coefficient and temperature for components that require convective heat transfer; Creep calculations were performed on each component based on finite element analysis. Check whether the creep calculation results converge. If they converge, record the results and generate an analysis report. If convergence is not achieved, the component will be reset. as well as The creep calculation results of the two-dimensional mesh in the first unit set are verified.

2. The finite element method for creep analysis of coolant reservoirs according to claim 1, characterized in that, The divided two-dimensional grid includes triangular grids and quadrilateral grids.

3. The finite element method for creep analysis of coolant reservoirs according to claim 1, characterized in that, The coolant reservoir comprises an upper reservoir body, a lower reservoir body, upper reservoir body reinforcing ribs, lower reservoir body reinforcing ribs, upper reservoir body lifting lugs, lower reservoir body lifting lugs, and / or vent holes.

4. The finite element method for creep analysis of coolant reservoirs according to claim 1, characterized in that, Setting load boundaries includes setting basic loads, internal surface pressure, and / or displacement constraints.

5. The finite element method for creep analysis of coolant reservoirs according to claim 4, characterized in that, The basic loads include low-temperature immersion temperature, high-temperature immersion temperature, initial temperature, creep time, post-creep temperature rise time, post-creep temperature rise holding time, post-creep cooling time, temperature rise and / or cooling temperature.

6. The finite element method for creep analysis of coolant reservoirs according to claim 1, characterized in that, The convective heat transfer coefficient and temperature include low-temperature immersion convective coefficient, high-temperature immersion convective coefficient, coupled operating condition convective coefficient, creep operating condition temperature rise convective coefficient, creep operating condition temperature drop convective coefficient, coupled operating condition ambient temperature, creep operating condition temperature rise ambient temperature and / or creep operating condition temperature drop ambient temperature.

7. The finite element method for creep analysis of coolant reservoirs according to claim 1, characterized in that, The creep analysis is based on ABAQUS finite element analysis.

8. A computer device comprising a processor and a memory, characterized in that, When the computer program stored in the memory is run on the processor, the finite element-based method for coolant reservoir creep analysis as described in any one of claims 1-7 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The method for creep analysis of coolant reservoirs based on any one of claims 1-7 is implemented when the computer program is run on the processor.

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