Integrated die-casting vehicle body structure modeling method, system and equipment and storage medium thereof

Abstract

The invention discloses an integrated die-casting vehicle body structure modeling method, system and device and a storage medium, and relates to the field of vehicle body structure network modeling, and the integrated die-casting vehicle body structure modeling method specifically comprises the following steps: building a shell unit of a large-area assembly, an upper vehicle body and an integrated die-casting lower vehicle body in an integrated die-casting vehicle body structure; each shell unit is provided with a riveting point; the large-area assembly, the upper vehicle body and the integrated die-casting lower vehicle body are arranged according to the distribution positions of the large-area assembly, the upper vehicle body and the integrated die-casting lower vehicle body in the integrated die-casting vehicle body structure Establishing a riveting point eight-diagram connection model based on the arranged riveting points of each shell unit; and riveting the arranged shell units based on the riveting point eight-diagram connection model to obtain the integrated die-casting vehicle body structure model. The method can solve the problems that manufacturing of riveting points on an actual vehicle body structure lacks data support in an earlier-stage design stage, and extra maintenance cost and maintenance time are brought to actual vehicle body maintenance.

Description

Technical Field

[0001] The present invention relates to the field of automobile body structure network modeling, and in particular to an integrated die-casting body structure modeling method, system, equipment and storage medium thereof. Background Art

[0002] In the current automobile body structure construction process, the frame structure in the automobile body structure is usually divided into two modules: the upper body and the lower body. Among them, since the structural performance of the upper body has higher collision requirements, the white body of the traditional frame structure is usually used for manufacturing, and the lower body is manufactured using integrated die-casting technology.

[0003] The body structure includes the upper body, the integrated die-cast lower body, the interior components and the larger shell structure. When assembling the various structures of the body structure, riveting is usually used to rivet the various components together to improve the overall strength of the body structure. In the early stage of the construction of the automobile structure, the durability test of the automobile body structure is also required. Usually, a finite element network model of the integrated die-cast body is established to calculate the durability of the body structure.

[0004] However, at present, when conducting finite element network modeling of the body structure, the modeling of the riveted points on the body structure is usually ignored. The lack of modeling and simulation at the actual riveted points makes it difficult to directly obtain the durability performance of the riveted points in the body structure in the early design stage. It is necessary to manufacture a real car model and then conduct actual experimental simulation to obtain the durability performance of the riveted points on the body structure, which makes the early development cost high and the cycle long. Summary of the invention

[0005] The present application provides an integrated die-cast vehicle body structure modeling method, system, equipment and storage medium, which can solve the technical problem that it is difficult to directly obtain the durability performance of the riveted points in the vehicle body structure in the early design stage in the prior art, and it is necessary to manufacture a real vehicle model and then conduct actual experimental simulation to obtain the durability performance of the riveted points on the vehicle body structure, resulting in high early development costs and a long cycle.

[0006] In a first aspect, an embodiment of the present application provides a method for modeling an integrated die-casting vehicle body structure, characterized in that it comprises the following steps:

[0007] Establishing modeling units of large-area components, upper body and integrated die-cast lower body in the integrated die-cast body structure, each of the modeling units having a riveting point;

[0008] Arrange the large-area components, upper body and integrated die-cast lower body in the integrated die-cast body structure according to their distribution positions in the actual integrated die-cast body structure;

[0009] Based on the laid out riveting points of each of the modeling units, a riveting point Bagua connection model is established;

[0010] Based on the riveting point Bagua connection model, the laid out modeling units are riveted to obtain a finite element network model of the integrated die-casting body structure.

[0011] In combination with the first aspect, in one implementation, based on the riveting points of each of the modeling units that have been laid out, a riveting point Bagua connection model is established, which specifically includes:

[0012] Based on the riveting points of the laid-out modeling units, the center coordinates of the riveting points, and the inner circle mesh diameter and outer circle width corresponding to the riveting points are obtained;

[0013] Based on the center coordinates, inner circle mesh diameter, and outer circle width, a Bagua connection model of riveted points is established.

[0014] In combination with the first aspect, in one implementation, the inner circle grid diameter is 5 mm.

[0015] In combination with the first aspect, in one implementation, the outer ring width is 1.275 mm.

[0016] In combination with the first aspect, in one implementation, the riveting point Bagua connection model includes:

[0017] A first riveting point Bagua connection model is established at a riveting point of one of the two connected modeling units;

[0018] A second riveting point Bagua connection model is established at a riveting point of another one of the two connected modeling units, and a vertical projection of the second riveting point Bagua connection model on the first riveting point Bagua connection model coincides with the first riveting point Bagua connection model;

[0019] And, a beam element connected to the middle node 4 of the first riveted point Bagua connection model and the second riveted point Bagua connection model.

[0020] In a second aspect, an integrated die-casting vehicle body structure modeling system includes:

[0021] The first module is used to: establish the modeling units of the large-area components, the upper body and the integrated die-cast lower body in the integrated die-cast body structure, each of the modeling units having a riveting point;

[0022] The second module is used to: arrange the large-area components, the upper body and the integrated die-cast lower body in the integrated die-cast body structure according to their distribution positions in the actual integrated die-cast body structure;

[0023] The third module is used to: establish a riveting point Bagua connection model based on the riveting points of each of the modeling units that have been laid out;

[0024] The fourth module is used to: rivet each of the laid out modeling units based on the riveting point Bagua connection model to obtain a finite element network model of the integrated die-casting body structure.

[0025] In conjunction with the second aspect, in one implementation, the third module includes:

[0026] The first submodule is used to: based on the riveting points of the laid out modeling units, obtain the center coordinates of the riveting points, and the inner circle grid diameter and outer circle width corresponding to the riveting points;

[0027] The second submodule is used to establish a riveting point Bagua connection model based on the center coordinates, the inner circle grid diameter, and the outer circle width.

[0028] In a third aspect, an embodiment of the present application provides an integrated die-cast vehicle body structure, which includes:

[0029] The frame structure includes large-area components, an upper body and an integrated die-cast lower body in the integrated die-cast body structure. The large-area components, the upper body and the integrated die-cast lower body in the integrated die-cast body structure are riveted according to the riveting point Bagua connection model. The riveting point Bagua connection model is obtained using the integrated die-cast body structure modeling method as described in claim 1.

[0030] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the finite element network modeling method of the integrated die-cast vehicle body structure as described in any one of claims 1 to 5 is implemented.

[0031] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, the finite element network modeling method of the integrated die-cast vehicle body structure described in any one of claims 1 to 5 is implemented.

[0032] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0033] The front cabin assembly, rear floor assembly and two ends of the middle assembly formed by one-piece die-casting are spliced ​​together through an integrated die-casting process to form an integrated die-cast lower body, which greatly reduces the number of components of the lower body, reduces the weight of the lower body and simplifies the process flow, thereby shortening the production cycle. The reduction in the number of components also reduces the factors affecting the accuracy of the lower body, making the body accuracy of the lower body more controllable, and solving the problems of heavy overall body mass, low production efficiency and difficulty in controlling accuracy in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 An exploded structural diagram of an integrated die-cast lower body in an integrated die-cast body structure in this application;

[0036] Figure 2 This is a schematic diagram of the overall structure of an integrated die-cast lower body in this application;

[0037] Figure 3 A schematic diagram of modeling a vehicle body structure in this application;

[0038] Figure 4 A schematic diagram of modeling a Bagua connection model of a first riveted point in a finite element network modeling method of a vehicle body structure of the present application;

[0039] Figure 5 A schematic diagram of modeling a Bagua connection model of a single riveted point in a finite element network modeling method of a vehicle body structure in the present application;

[0040] In the figure: 1. Upper body; 2. Integrated die-cast lower body; 21. Front cabin assembly; 22. Intermediate assembly; 221. Battery pack upper cover; 222. Battery pack bottom guard plate; 223. Rear floor assembly; 3. In-vehicle components; 31. Large-area components; 32. Unit components; 4. Intermediate nodes; 41. First node; 411. Inner ring unit; 42. Second node; 421. Outer ring unit; 5. Bagua connection model of the first riveted point; 6. Bagua connection model of the second riveted point; 7. Beam unit. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The embodiments of the present application provide an integrated die-cast vehicle body structure modeling method, system, device and storage medium thereof, which can solve the problem in the prior art that it is difficult to directly obtain the durability performance of the riveted points in the vehicle body structure in the early design stage, and it is necessary to manufacture a real vehicle model and then conduct actual experimental simulation to obtain the durability performance of the riveted points on the vehicle body structure, resulting in high early development costs and a long cycle.

[0043] For ease of understanding, the present application embodiment is described with reference to the physical integrated die-casting vehicle body structure produced after the durability test. Figure 1 The integrated die-cast vehicle body structure disclosed in the present application includes a frame structure and an in-vehicle component 3 . The frame structure includes an upper vehicle body 1 and an integrated die-cast lower vehicle body 2 .

[0044] The integrated die-cast lower body 2 includes a front cabin assembly 21, a rear floor assembly 223 and an intermediate assembly 22. The front cabin assembly 21 is made by integral die-casting, and the rear floor assembly 223 is also made by integral die-casting. The two ends of the intermediate assembly 22 are respectively spliced ​​with the front cabin assembly 21 and the rear floor assembly 223 to form an integrated die-cast lower body 2. By replacing the welding process with die-casting, the connection strength of a single component is improved, thereby enhancing the safety of the integrated die-cast lower body 2, and the number of components of the lower body is greatly reduced, the weight of the lower body is reduced, and the process flow is simplified, thereby shortening the production cycle. The reduction in the number of components also reduces the factors affecting the accuracy of the lower body, making the body accuracy of the lower body more controllable, and solving the problems of heavy overall structural mass of the lower body, low production efficiency and difficulty in controlling accuracy that have always existed in body manufacturing.

[0045] In one embodiment of the present application, the intermediate assembly 22 includes a battery pack upper cover 221 and a battery pack bottom guard plate 222. The battery pack upper cover 221 is made by integral die casting, and the battery pack bottom guard plate 222 is also made by integral die casting. The battery pack upper cover 221 and the battery pack bottom guard plate 222 are spliced ​​up and down, and the two ends of the battery pack bottom guard plate 222 are spliced ​​with the front compartment assembly 21 and the rear floor assembly 223 respectively, reducing the total number of parts of the integrated die-cast lower body 2 from hundreds of parts in the traditional way to four parts for splicing, which greatly reduces the number of parts, and the battery pack upper cover The storage space formed between 221 and the battery pack bottom guard plate 222 is used to install the power battery pack module. The power battery pack module is integrated with the integrated die-cast lower body 2, which greatly improves the structural strength of the vehicle. In the event of a frontal collision, the safety of the vehicle interior structure can be increased by 50%, and in the event of a side collision, it can also be increased by 45%, so that the vehicle can better protect the safety of the occupants in the event of a collision; and the integration of the power battery pack module and the integrated die-cast lower body 2 also enhances the torsional rigidity of the vehicle, making the deformation of the chassis suspension and other components of the vehicle smaller under various road conditions. This means that when cornering at high speed, the roll phenomenon of the vehicle will be significantly improved, the body stability will be greatly improved, and the handling will also be enhanced.

[0046] In other embodiments, the intermediate assembly 22 may also be manufactured by integral die-casting, thereby reducing the number of parts of the integral die-cast lower body 2 to three, and further simplifying the manufacturing process of the integral die-cast lower body 2.

[0047] Reference Figure 2 The battery pack upper cover 221 and the battery pack bottom guard plate 222 are connected by rivets up and down to form an intermediate assembly 22. The two ends of the battery pack bottom guard plate 222 in the length direction are respectively connected to the front compartment assembly 21 and the rear floor assembly 223 by a number of rivets distributed at intervals. The installation method is simple and the installation is firm.

[0048] In order to further improve the lightweight degree of the integrated die-cast lower body 2, the front cabin assembly 21, the battery pack upper cover 221, the battery pack bottom guard plate 222 and the rear floor assembly 223 are all made of aluminum alloy materials, which have the characteristics of high strength and lightness. Compared with the traditional steel material lower body, the weight of the integrated die-cast lower body 2 can be significantly reduced, with a maximum weight reduction of 150kg to 200kg, which helps to improve the fuel efficiency and driving performance of the vehicle.

[0049] Since the upper body 1 has higher requirements for collision performance in actual use, and the strength of steel is higher than that of aluminum alloy, the upper body 1 is still made of steel using traditional technology. The upper body 1 and the integrated die-cast lower body 2 are connected by a number of rivets distributed at intervals to form the final frame structure, which has a simple structure and a stable connection.

[0050] The vehicle interior component 3 includes a large-area component 31 and a unit component 32, both of which are arranged in the vehicle frame structure by rivets. In this embodiment, the large-area component 31 includes components with a large area and a thin thickness, such as a vehicle panel, and the unit component 32 includes block components such as a vehicle seat and a shock absorber.

[0051] In order to simulate the actual vehicle body structure in the early design stage and verify the durability of the vehicle body structure, this application proposes an integrated die-cast vehicle body structure modeling method, which specifically uses finite element network modeling to perform early modeling of the vehicle body structure and calculates its durability based on the finite element network modeling of the integrated die-cast vehicle body structure. Finite element modeling is widely used in many fields such as architecture, machinery, heat conduction, electromagnetic fields, fluid mechanics, geomechanics, biomedicine, etc. Through finite element modeling, the mechanical behavior of complex structures can be deeply analyzed and predicted.

[0052] Based on the above-mentioned integrated die-casting vehicle body structure, the present application proposes an integrated die-casting vehicle body structure modeling method, which specifically includes:

[0053] S1: Establishing modeling units of a large-area component 31, an upper body 1 and an integrated die-cast lower body 2 in an integrated die-cast body structure, each of the modeling units having a riveting point;

[0054] More specifically, the upper body 1, the front compartment assembly 21, the battery pack upper cover 221, the battery pack bottom guard plate 222, the rear floor assembly 223 and the unit component 32 are modeled using body unit modeling; the large area component 31 is modeled using shell unit modeling. According to the design of the actual integrated die-casting body structure, the CAD graphics of the actual integrated die-casting body structure will be drawn before the finite element network modeling, and the corresponding riveting points on the integrated die-casting body structure will be marked, so that the operator can find the position of the corresponding riveting point in the reference system according to the pre-designed marking points after completing the finite element modeling of each body unit and shell unit. .

[0055] Among them, solid unit modeling is an important method in finite element modeling. Solid unit modeling can more accurately represent the three-dimensional shape and internal properties of complex structures. Therefore, the upper body 1, front compartment assembly 21, battery pack cover 221, battery pack bottom guard plate 222, rear floor assembly 223 and unit component 32, which have three-dimensional shapes, are all modeled using solid units; shell unit modeling is mainly used to simulate structures whose scale in one direction is much smaller than that in other directions, such as plates and shells. Therefore, large-area components 31 with thin-walled structures such as body sheet metal are modeled using shell units.

[0056] More specifically, the average mesh size of the body unit and the shell unit is 8 mm. After the finite element unit model of each component is established, the network material parameters required for actual manufacturing are assigned to the mesh. For example, in this embodiment, the upper body 1 is made of steel material, and the integrated die-cast lower body 2 is made of aluminum alloy for parameter assignment to simulate various data of the integrated die-cast body structure in reality.

[0057] S2: Arrange the large-area component 31, the upper body 1 and the integrated die-cast lower body 2 according to their distribution positions in the actual integrated die-cast body structure. At this time, the large-area component 31, the upper body 1 and the integrated die-cast lower body 2 are only in contact with each other and are not riveted.

[0058] S3: establishing a riveted point Bagua connection model based on the riveted points of each of the modeling units that have been laid out;

[0059] Operators can establish a riveting point Bagua connection model at the preset riveting points to simulate the riveting state of two modeling units in the finite element network modeling. Figure 4 and Figure 5 A single riveting point Bagua connection model includes a first riveting point Bagua connection model 5, a second riveting point Bagua connection model 6 and a beam unit 7. The first riveting point Bagua connection model 5 and the second riveting point Bagua connection model 6 are respectively established at riveting points reserved on two modeling units that need to be riveted, and the vertical projection of the second riveting point Bagua connection model 6 on the first riveting point Bagua connection model 5 coincides with the first riveting point Bagua connection model 5.

[0060] The modeling method of the first riveting point Bagua connection model 5 is the same as that of the second riveting point Bagua connection model 6. Therefore, the modeling method of the first riveting point Bagua connection model 5 is used as an example for explanation. Figure 4 The middle node 4 of the first riveting point Bagua connection model 5 is the axis of the riveting point reserved on the modeling unit, and the first riveting point Bagua connection model 5 is divided into an inner circle unit 411 and an outer circle unit 421. The inner circle unit 411 is used to simulate the actual riveting point, and the outer circle unit 421 is extended outside the inner circle unit 411 to expand the area of ​​the first riveting point Bagua connection model 5, so as to better reflect the stress distribution at the riveting point in the subsequent durability performance simulation.

[0061] In finite element network modeling, all types of modeling units are formed by splicing multiple network cells such as triangles and quadrilaterals, wherein the more edges a single network cell has, the higher its accuracy. Therefore, the inner circle unit 411 includes an octagonal network unit formed by splicing four quadrilateral network cells. After determining the middle node 4, four mutually spliced ​​quadrilaterals are established according to the preset inner circle mesh diameter to complete the establishment of the inner circle unit 411; then, along the eight first nodes 41 outside the inner circle unit 411, eight mutually connected quadrilateral mesh units are established along the outer side of the inner circle unit 411 according to the preset outer circle width, to complete the modeling of the outer circle unit 421. After the modeling is completed, the network material of the base material is assigned to each mesh unit of the first riveting point Bagua connection model 5 and the second riveting point Bagua connection model 6, and the reference system number is assigned to the middle node 4, the first node 41 and the second node 42 of each first riveting point Bagua connection model 5 and the second riveting point Bagua connection model 6 to indicate that a riveting point modeling is formed here.

[0062] Furthermore, since the frame structure belongs to the skeleton structure of the car, the connection between the upper body 1 and the integrated die-cast lower body 2 requires a high-strength connection, so the rivet connections between the frame structures are modeled using FDS riveting points, that is, the riveting points between the upper body 1 and the integrated die-cast lower body 2, the riveting points between the front compartment assembly 21, the battery pack upper cover 221, the battery pack bottom guard plate 222 and the rear floor assembly 223 are modeled using FDS riveting points to improve the connection strength of the frame structure.

[0063] FDS (Flow Drill Screw) riveting is a cold forming process that transmits the high-speed rotation of the motor to the sheet to be connected through the central tightening shaft of the equipment, generates heat through friction and produces plastic deformation, and then self-taps and screws. FDS riveting has the advantages of being able to connect metals and non-metals of different materials, no welding is required during the connection process, no smoke and harmful substances are generated, high connection strength, good dynamic load-bearing capacity, high shear strength, and good air tightness and water tightness.

[0064] Taking a specific embodiment as an example, the inner circle grid diameter of the riveting point is 5mm, and the outer circle width is 1.275mm. The elastic modulus of the inner circle unit 411 is 40 times the elastic modulus of the substrate; the elastic modulus of the outer circle unit 421 is 6 times the elastic modulus of the substrate. The substrate is the material of the first riveting point Bagua connection model 5 or the second riveting point Bagua connection model 6. In this embodiment, there are only two substrates, steel and aluminum alloy.

[0065] The mesh material IDs of the inner ring unit 411 and the outer ring unit 421 at the steel end are 151 and 152 respectively, and the mesh material IDs of the inner ring unit 411 and the outer ring unit 421 at the aluminum end are 154 and 15 respectively. The intermediate nodes 4 modeled by adjacent FDS riveted points are connected by beam units 7. Beam unit 7 can support multiple mechanical behaviors such as tension, compression, torsion in two orthogonal planes, bending and shear, so as to more realistically simulate the beam structure in actual engineering. The intermediate node 4 is numbered 560 in the modeling reference system, the first-layer nodes are numbered 15 in the modeling reference system, and the second-layer nodes are numbered 120 in the modeling reference system.

[0066] The rivet connection between the unit component 32 and the frame structure is modeled using SPR riveting points. SPR (Self-Piercing Riveting) riveting is a riveting process that uses a tubular rivet to pierce the upper plate under pressure, penetrate the lower plate, and then open the tail to form a self-locking connection. The fastening points of SPR rivets have high fatigue resistance and strength, and can meet the strict requirements of the automotive, aviation and other fields for connection strength. In automobile manufacturing, SPR riveting can be used to connect body structural parts, engine parts, chassis systems, etc., to achieve lightweight body and improved structural strength. Therefore, self-piercing riveting is usually used to complete the connection between the unit component 32 and the frame structure.

[0067] The SPR riveted joints are modeled in the same way as above. The difference between them and the FDS riveted joints is that the mesh material IDs of the inner ring unit 411 and the outer ring unit 421 of the steel end of the SPR riveted joints are 161 and 162 respectively, and the mesh material IDs of the inner ring unit 411 and the outer ring unit 421 of the aluminum end are 164 and 165 respectively. The intermediate nodes 4 of the adjacent SPR riveted joints are also connected by CBAR units. The intermediate nodes 4 of the SPR riveted joints are numbered 451 in the modeling reference system, the first-layer nodes are numbered 135 in the modeling reference system, and the second-layer nodes are numbered 140 in the modeling reference system.

[0068] S4: Based on the riveting point Bagua connection model, the laid-out modeling units are riveted to obtain a finite element network model of the integrated die-casting vehicle body structure.

[0069] After the body structure is modeled according to the finite element network modeling method of the above-mentioned body structure, the quasi-static multi-channel method can be used, that is, the system is regarded as being under slowly changing or nearly static conditions, and the data of multiple variables can be monitored and processed simultaneously. Unit loads are applied to the hard points originally set on the integrated die-cast body structure, and the stress results are calculated. Then, the stress results are accumulated with the road load spectrum of similar models to simulate the time history of the external loads borne by the vehicle structure during actual road driving of the actual vehicle, and the stress amplitude and average stress correction are statistically calculated. By comparing with the material SN curve (Stress-Number of Cycles curve, that is, stress-life curve or fatigue life curve, which is an important tool for describing the fatigue performance of materials under cyclic stress or cyclic strain), the overall durability damage is calculated. In the early design stage, the durability performance of the body structure can be calculated by constructing a finite element modeling of the body structure, potential design risks can be identified in advance, and risk items can be optimized and improved to increase the possibility of passing the subsequent test verification once. Here, automatic calculations can be performed through the program, which will not be explained in more detail.

[0070] In view of the above-mentioned integrated die-casting vehicle body structure modeling method, the present application also provides an integrated die-casting vehicle body structure modeling system, which includes:

[0071] The first module is used to: establish the modeling units of the vehicle interior component 3, the upper vehicle body 1 and the integrated die-cast lower vehicle body 2 in the integrated die-cast vehicle body structure, each of the modeling units having a riveting point;

[0072] The second module is used to: arrange the in-vehicle components 3, the upper vehicle body 1 and the integrated die-cast lower vehicle body 2 in the integrated die-cast vehicle body structure according to their distribution positions in the actual integrated die-cast vehicle body structure;

[0073] The third module is used to: establish a riveting point Bagua connection model based on the riveting points of each of the modeling units that have been laid out;

[0074] The fourth module is used to: rivet each of the laid out modeling units based on the riveting point Bagua connection model to obtain a finite element network model of the integrated die-casting body structure.

[0075] The present application embodiment also provides a storage medium, on which a computer program is stored, and the steps of the above-mentioned embodiments are implemented when the computer program is executed by the processor. It should be noted that the storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0076] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0077] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0078] Computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and also conventional procedural programming languages-such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect through the Internet).

[0079] Corresponding to the above-mentioned vehicle engine oil pressure control method, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and the processor implements the steps of the above-mentioned embodiments when executing the computer program.

[0080] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0081] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0082] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for modeling an integrated die-casting vehicle body structure, characterized in that: It includes the following steps: Establishing modeling units of an interior component (3), an upper body (1) and an integrated die-cast lower body (2) in an integrated die-cast body structure, each of the modeling units having a riveting point; Arrange the vehicle interior components (3), the upper vehicle body (1) and the integrated die-cast lower vehicle body (2) according to their distribution positions in the actual integrated die-cast vehicle body structure; Based on the laid out riveting points of each of the modeling units, a riveting point Bagua connection model is established; Based on the riveting point Bagua connection model, the laid out modeling units are riveted to obtain a finite element network model of the integrated die-casting body structure.

2. The integrated die-casting vehicle body structure modeling method according to claim 1, characterized in that: Based on the riveting points of each of the modeling units that have been laid out, a riveting point Bagua connection model is established, which specifically includes: Based on the riveting points of the laid-out modeling units, the center coordinates of the riveting points, and the inner circle mesh diameter and outer circle width corresponding to the riveting points are obtained; Based on the center coordinates, inner circle mesh diameter, and outer circle width, a Bagua connection model of riveted points is established.

3. The method for modeling an integrated die-casting vehicle body structure according to claim 2, characterized in that: The inner circle grid diameter is 5mm.

4. The method for modeling an integrated die-casting vehicle body structure according to claim 2, characterized in that: The outer ring width is 1.275mm.

5. The method for modeling an integrated die-casting vehicle body structure according to claim 1, characterized in that: The riveted point gossip connection model includes: A first riveting point Bagua connection model (5), which is established at a riveting point of one of the two connected modeling units; A second riveting point Bagua connection model (6) is established at a riveting point of another of the two connected modeling units, and a vertical projection of the second riveting point Bagua connection model (6) on the first riveting point Bagua connection model (5) coincides with the first riveting point Bagua connection model (5); And, a beam unit (7) connected to the middle node (4) 4 of the first riveted point Bagua connection model (5) and the second riveted point Bagua connection model (6).

6. An integrated die-casting vehicle body structure modeling system, characterized in that: It includes: A first module is used to: establish the modeling units of the vehicle interior component (3), the upper vehicle body (1) and the integrated die-cast lower vehicle body (2) in the integrated die-cast vehicle body structure, each of the modeling units having a riveting point; The second module is used to: arrange the in-vehicle components (3), the upper vehicle body (1) and the integrated die-cast lower vehicle body (2) according to their distribution positions in the actual integrated die-cast vehicle body structure; The third module is used to: establish a riveting point Bagua connection model based on the riveting points of each of the modeling units that have been laid out; The fourth module is used to: rivet each of the laid out modeling units based on the riveting point Bagua connection model to obtain a finite element network model of the integrated die-casting body structure.

7. The integrated die-casting vehicle body structure modeling system according to claim 6, characterized in that: The third module includes: The first submodule is used to: based on the riveting points of the laid out modeling units, obtain the center coordinates of the riveting points, and the inner circle grid diameter and outer circle width corresponding to the riveting points; The second submodule is used to establish a riveting point Bagua connection model based on the center coordinates, the inner circle grid diameter, and the outer circle width.

8. Integrated die-cast body structure, characterized in that: It includes: A vehicle frame structure, the vehicle frame structure comprising an interior component (3), an upper vehicle body (1) and an integrated die-cast lower vehicle body (2) in an integrated die-cast vehicle body structure, wherein the interior component (3), the upper vehicle body (1) and the integrated die-cast lower vehicle body (2) in the integrated die-cast vehicle body structure are riveted according to a riveted point Bagua connection model, and the riveted point Bagua connection model is obtained by using the integrated die-cast vehicle body structure modeling method as described in claim 1.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the finite element network modeling method of the integrated die-cast vehicle body structure described in any one of claims 1 to 5 is implemented.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program running on the processor, wherein: When the processor executes the computer program, the finite element network modeling method of the integrated die-cast vehicle body structure described in any one of claims 1 to 5 is implemented.

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