Optimization method of door guard plate side intrusion model and related equipment

Abstract

The embodiment of the invention relates to an optimization method of a door protection plate side intrusion model and related equipment, and the optimization method comprises the steps: constructing a vehicle door metal plate intrusion energy finite element model according to a whole vehicle side impact experiment; according to the vehicle door sheet metal intrusion energy finite element model simulation process, the stress-strain distribution condition of each part of the vehicle door sheet metal is analyzed, and the maximum intrusion energy area of the vehicle door sheet metal is determined; the rack is provided with an invasion block in a corresponding maximum invasion energy area, a constraint block is arranged, and impact force is applied to a loading block of the rack to simulate the side impact condition of the door guard plate; according to the vehicle door metal plate invasion energy finite element model and the material parameters of the invasion blocks, a door protection plate side invasion model is constructed; and comparing the actual pressure value applied to the corresponding constraint block by the invasion block with a simulation pressure value obtained through the door guard plate side invasion model, and correcting the door guard plate side invasion model according to the condition parameters of the door guard plate side impact experiment simulated by the rack. And the accuracy of the constructed door protection plate side intrusion model is ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of automobile component design, and in particular to an optimization method for a door panel side intrusion model and related equipment. Background Art

[0002] With current technology, in order to ensure the safety of the vehicle in a collision accident, it is necessary to test the side collision of the door guard panel. Currently, a large number of test vehicles need to be tested for side impact to verify the performance of the door system. However, in order to ensure the accuracy of the data, a large number of test vehicles need to be prepared for side impact tests. The cost is too high and the test cycle is long. In addition, there is a lack of research on breaking down the test results into specific locations, resulting in inaccurate construction of the door guard panel side intrusion model. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a method for optimizing a door guard panel side intrusion model;

[0005] A second aspect of the present invention provides an optimization device for a door guard plate side intrusion model;

[0006] A third aspect of the present invention provides an electronic device;

[0007] A fourth aspect of the present invention provides a computer-readable storage medium.

[0008] In view of this, according to the first embodiment of the present application, a method for optimizing a door guard plate side intrusion model is proposed, comprising:

[0009] Based on the vehicle side impact test, a finite element model of the door sheet metal intrusion energy was constructed;

[0010] Based on the simulation process of the door sheet metal intrusion energy finite element model under different loading conditions, the distribution of stress and strain in various parts of the door sheet metal is analyzed;

[0011] Determining the maximum intrusion energy region of the door sheet metal based on the distribution of stress and strain at various locations of the door sheet metal;

[0012] According to the maximum intrusion energy area of the door sheet metal, an intrusion block is set at the corresponding position of the test bench, and according to the above vehicle structure, a constraint block is set at the corresponding position of the test bench to add constraint conditions to the above simulated door guard plate side impact, and an impact force is applied to the loading block of the above test bench to simulate the door guard plate side impact situation;

[0013] Obtaining a door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block;

[0014] comparing an actual pressure value applied by the intrusion block to the corresponding restraint block with a simulated pressure value obtained by the door guard plate side intrusion model;

[0015] In which, when the difference between the above-mentioned actual pressure value and the above-mentioned simulated pressure value is greater than or equal to the preset difference, the above-mentioned door guard plate side intrusion model is corrected according to the condition parameters of the above-mentioned door guard plate side impact test simulated by the bench.

[0016] In a feasible implementation, it further includes:

[0017] The door guard plate side intrusion model is optimized according to the actual pressure value of the intrusion block on the restraint block.

[0018] In a feasible implementation manner, the step of optimizing the door guard plate side intrusion model according to the actual pressure value of the intrusion block on the restraint block includes:

[0019] Determining a preset maximum pressure value that the constraint block is allowed to withstand based on the simulation position corresponding to the constraint block;

[0020] comparing the actual pressure value with the preset maximum pressure value, and adjusting the material of the door sheet metal and / or the intrusion block when the actual pressure value is greater than or equal to the preset maximum pressure value;

[0021] The above-mentioned test bench is rearranged according to the adjusted material, and a simulated door guard panel side impact test is performed on the rearranged test bench. When the above-mentioned actual pressure value is less than the above-mentioned preset maximum pressure value, the above-mentioned adjusted material is loaded into the material library of the above-mentioned door guard panel side intrusion model.

[0022] In a feasible embodiment, the step of constructing a finite element model of the door sheet metal intrusion energy based on the vehicle side impact test includes:

[0023] Obtaining, based on a side impact test of the vehicle, the initial kinetic energy of the vehicle, the energy loss of the vehicle due to air resistance and collision angle, and the energy consumption of the vehicle due to external forces during the collision;

[0024] A finite element model of the door sheet metal intrusion energy is constructed based on the initial kinetic energy of the vehicle, the energy loss of the vehicle due to air resistance and collision angle, and the energy consumption value of the external force acting on the vehicle during the collision.

[0025] In a feasible embodiment, the step of obtaining the door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block includes:

[0026] Obtaining the stiffness coefficient and force-bearing area of the intrusion block at different positions;

[0027] The door guard plate side intrusion model is constructed based on the intrusion energy obtained from the above-mentioned door sheet metal intrusion energy finite element model, the above-mentioned rigidity coefficient and the above-mentioned force-bearing area.

[0028] In a feasible implementation manner, the intrusion block includes:

[0029] The upper body intrusion block, handle intrusion block, armrest intrusion block, energy absorption box intrusion block and speaker grille intrusion block of the above-mentioned door guard plate.

[0030] In a feasible implementation, the constraint block includes:

[0031] B-pillar guard plate restraint block, simulated chest restraint block, simulated abdomen restraint block and simulated pelvic restraint block.

[0032] According to a second aspect of the present application, an optimization device for a door guard plate side intrusion model is provided, comprising:

[0033] The first construction unit is used to construct a door sheet metal finite element model according to a full vehicle side impact test;

[0034] an analysis unit for analyzing the distribution of stress and strain at various locations of the door sheet metal according to a simulation process of the door sheet metal finite element model under different loading conditions;

[0035] a determination unit, configured to determine an area of maximum intrusion deformation of the door sheet metal according to the distribution of stress and strain at various locations of the door sheet metal;

[0036] The test unit is configured to place intrusion blocks at corresponding positions on the test bench based on the maximum intrusion energy area of the door sheet metal, and to place constraint blocks at corresponding positions on the test bench based on the entire vehicle structure, so as to add constraint conditions to the simulated door guard panel side impact, and to apply an impact force to the loading blocks of the test bench to simulate the door guard panel side impact;

[0037] A second construction unit is configured to obtain a door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block;

[0038] A comparison and correction unit is used to compare the actual pressure value applied by the above-mentioned intrusion block to the corresponding constraint block and the simulated pressure value obtained by the above-mentioned door guard panel side intrusion model; wherein, when the difference between the above-mentioned actual pressure value and the above-mentioned simulated pressure value is greater than or equal to the preset difference, the above-mentioned door guard panel side intrusion model is corrected according to the condition parameters of the above-mentioned door guard panel side impact test simulated by the bench.

[0039] According to the third aspect of the present application, an electronic device is proposed, including: a memory and a processor, characterized in that the above-mentioned processor is used to implement the steps of the door guard plate side intrusion model optimization method as described in any one of the above-mentioned technical solutions when executing the computer program stored in the memory.

[0040] According to the fourth aspect of the present application, a computer-readable storage medium is proposed, on which a computer program is stored, characterized in that when the above-mentioned computer program is executed by a processor, an optimization method for the door guard plate side intrusion model as described in any one of the above-mentioned technical solutions is implemented.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects: the optimization method of the door guard plate side intrusion model provided in the embodiment of the present application constructs a finite element model of the door sheet metal intrusion energy according to the whole vehicle side impact test; analyzes the distribution of stress and strain of each part of the door sheet metal according to the simulation process of the above-mentioned door sheet metal intrusion energy finite element model under different loading conditions; determines the maximum intrusion energy area of the door sheet metal according to the distribution of stress and strain of each part of the door sheet metal; sets an intrusion block at the corresponding position of the test bench according to the above-mentioned maximum intrusion energy area of the door sheet metal, and sets an intrusion block at the corresponding position of the test bench according to the above-mentioned whole vehicle structure. A constraint block is set at the corresponding position of the test bench to add constraint conditions to the above-mentioned simulated door guard panel side collision, and an impact force is applied to the loading block of the above-mentioned test bench to simulate the door guard panel side collision situation; the door guard panel side intrusion model is obtained based on the above-mentioned vehicle door sheet metal intrusion energy finite element model and the material parameters of the above-mentioned intrusion block; the actual pressure value applied by the above-mentioned intrusion block to the corresponding constraint block is compared with the simulated pressure value obtained by the above-mentioned door guard panel side intrusion model; wherein, when the difference between the above-mentioned actual pressure value and the above-mentioned simulated pressure value is greater than or equal to the preset difference, the above-mentioned door guard panel side intrusion model is corrected according to the condition parameters of the above-mentioned door guard panel side collision test simulated by the test bench. By constructing a test bench, the actual side collision situation of the door guard panel can be realistically simulated, and the data obtained from the test bench simulation and the data of the door guard panel side intrusion model can be mutually verified to correct the door guard panel side intrusion model, thereby ensuring the accuracy of the constructed door guard panel side intrusion model. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0043] Figure 1 A schematic flow chart of a method for optimizing a door guard plate side intrusion model according to an embodiment of the present application;

[0044] Figure 2 A schematic structural diagram of a stand at one angle according to an embodiment of the present application;

[0045] Figure 3 A schematic structural diagram of a stand according to an embodiment of the present application from another angle;

[0046] Figure 4 A schematic structural block diagram of a door guard plate side intrusion model optimization device according to an embodiment of the present application;

[0047] Figure 5 A schematic structural block diagram of an electronic device according to an embodiment of the present application.

[0048] in, Figure 2 and Figure 3 The corresponding relationship between the reference numerals and component names is as follows:

[0049] 200 test stand, 210 upper body intrusion block, 220 hand intrusion block, 230 armrest intrusion block, 240 energy absorption box intrusion block, 250 speaker grille intrusion block, 260 loading block, 270 secondary explosion-proof buckle. DETAILED DESCRIPTION

[0050] In order to better understand the above technical solution, the technical solution of the embodiment of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiment of the present application and the specific features in the embodiment are detailed descriptions of the technical solution of the embodiment of the present application, rather than limitations on the technical solution of the present application. In the absence of conflict, the embodiment of the present application and the technical features in the embodiment can be combined with each other.

[0051] like Figure 1 As shown, according to the first embodiment of the present application, a method for optimizing a door guard plate side intrusion model is proposed, comprising:

[0052] S110: Construct a finite element model of door sheet metal intrusion energy based on the vehicle side impact test;

[0053] Step S110 includes step S1101 and step S1102.

[0054] Among them, step S1101 includes: according to the side collision test of the vehicle, obtaining the initial kinetic energy of the above-mentioned vehicle, the energy loss of the above-mentioned vehicle caused by air resistance and collision angle, and the energy consumption value of the above-mentioned vehicle caused by external forces during the collision process.

[0055] It is understood that data collected during side impact tests on vehicles is combined with finite element simulation analysis to analyze various performance indicators of the door system. Specifically, during the test, the vehicle's initial kinetic energy, energy loss due to possible air resistance and collision angle, and the energy consumption of external forces during the collision are obtained.

[0056] Step S1102 includes: constructing a finite element model of the door sheet metal intrusion energy based on the initial kinetic energy of the vehicle, the energy loss of the vehicle due to air resistance and collision angle, and the energy consumption value of the external force acting on the vehicle during the collision.

[0057] It can be understood that the above parameter relationships are as follows:

[0058] The initial kinetic energy of the vehicle is

[0059] The vehicle's capacity loss due to air resistance and collision angle is

[0060] The energy consumption of the external force during the collision of the vehicle is

[0061] The door sheet metal intrusion energy is E, and the door sheet metal intrusion energy finite element model is:

[0062]

[0063] By introducing air density ρ, cross-sectional area A and drag coefficient C d , to account for the impact of air resistance on collision energy, ensuring the accuracy of the finite element model of door sheet metal intrusion energy in high-speed collisions. By introducing the collision angle θ, the effect of collisions at different angles on energy absorption is considered. By integrating the external force Fext, the impact of external forces such as friction and air resistance on the total intrusion energy during the collision can be calculated.

[0064] For example, according to the finite element model of the door sheet metal intrusion energy, when the door sheet metal is subjected to a side collision with an acceleration of 5m / s, the intrusion energy of the door sheet metal is 194KJ; when the door sheet metal is subjected to a side collision with an acceleration of 3m / s, the intrusion energy of the door sheet metal is 135KJ.

[0065] It's understandable that when performing finite element analysis of the door sheet metal intrusion energy finite element model, the entire simulated collision duration is set to 25 milliseconds. This time period covers the critical stages of the door sheet metal's state changes from the start of the collision to its end. For example, at different time points during the collision, the door sheet metal exhibits varying degrees of deformation. At 6 milliseconds, the maximum Y-direction deformation of the door is 7.8 mm; at 16 milliseconds, this deformation increases to 81 mm; at 21 milliseconds, the deformation further climbs to 219 mm; and at 25 milliseconds, the maximum Y-direction deformation reaches 334 mm. Clearly, the degree of door deformation increases with the duration of the collision, and judging by the deformation, the door sheet metal exhibits significant inward concavity after the collision.

[0066] S120: Analyze the distribution of stress and strain in various parts of the door sheet metal according to the simulation process of the door sheet metal intrusion energy finite element model under different loading conditions.

[0067] It's understandable that when a door sheet metal is subjected to external forces, its internal stress changes with strain. The speed and degree of the material's response to strain is the material's strain rate, which directly determines whether the door can effectively absorb and dissipate impact energy. Different materials have different strain rate characteristics, which can be analyzed in detail based on the material's stress-strain curve. The initial stage of the stress-strain curve reveals the material's initial elastic modulus—that is, its ability to resist elastic deformation. As strain increases, observing the curve's slope, yield point, and strengthening stage reveals the material's mechanical properties at different levels of deformation. During a door sheet metal side impact test, the material's stress-strain curve can be used to analyze the distribution of stress and strain in various parts of the door sheet metal.

[0068] S130: Determine the maximum intrusion energy region of the door sheet metal according to the distribution of stress and strain at each portion of the door sheet metal.

[0069] It is understandable that by collecting, organizing, and analyzing a large amount of simulation data, intuitive and visual analysis results such as stress cloud maps and strain cloud maps can be drawn. With the help of stress cloud maps and strain cloud maps, it is possible to clearly observe areas of stress concentration and locations with drastic strain changes. These locations are the most likely potential areas for large deformation or even maximum intrusion deformation. At the same time, combined with the mechanical properties of the material, such as yield strength and tensile strength, it can be further determined whether the sheet metal in the potential area of maximum intrusion deformation has exceeded the elastic deformation range of the material under the corresponding impact force and entered the plastic deformation stage. The degree of plastic deformation is also directly related to the severity of the intrusion deformation. After repeated simulation verification and comparison and calibration with some actual collision test results, the precise location of the maximum intrusion energy area of the door sheet metal was finally determined.

[0070] S140: According to the maximum intrusion energy area of the above-mentioned door sheet metal, an intrusion block is set at the corresponding position of the test stand 200, and according to the above-mentioned vehicle structure, a constraint block is set at the corresponding position of the above-mentioned test stand 200 to add constraint conditions to the above-mentioned simulated door guard panel side collision, and an impact force is applied to the loading block 260 of the above-mentioned test stand 200 to simulate the door guard panel side collision situation.

[0071] It is understood that after determining the maximum intrusion energy area of the door panel, in order to accurately and efficiently analyze the door panel's crashworthiness and reduce secondary damage to cabin passengers during a collision, the door panel's crashworthiness can be decomposed. Based on the modules installed on the door panel, intrusion blocks are installed at corresponding locations on the test bench 200 for simulation. Furthermore, considering that in a side collision, the door panel intrusion will impact the seat, B-pillar, and other locations, especially the side of the passenger facing the door panel, to ensure safety during side intrusion, constraint blocks are installed at corresponding locations on the test bench 200 to add constraints to the simulated door panel side impact. By applying an impact force to the loading block 260 of the test bench 200, the door panel side impact situation can be realistically simulated. This ensures that the door panel side intrusion model can guarantee side collision safety.

[0072] In some examples, such as Figure 2 As shown, the above-mentioned intrusion blocks include: the upper body intrusion block 210 of the above-mentioned door guard plate, the handle intrusion block 220, the armrest intrusion block 230, the energy absorption box intrusion block 240 and the speaker grille intrusion block 250.

[0073] It is understandable that the door panel crashworthiness performance can be decomposed and divided into eight modules. Specifically, the eight modules include: the decorative handle area, during a high-speed vehicle collision, the decorative handle is examined in particular. Attention is paid to whether there will be quality problems such as flying out and injuring people due to the impact of the collision, so as to evaluate the safety of this area in terms of crashworthiness and ensure that in extreme cases, the flying handle will not cause additional harm to the passengers in the car; the armrest crashworthiness area, for the armrest part of the door panel, its displacement during a side collision and whether there is a risk of cracking. When a side collision occurs, the displacement of the armrest is directly related to whether it will invade the space inside the car and cause squeezing and other effects on the passengers, while cracking may cause fragments to fly and endanger the safety of the passengers, so the examination of these two aspects is crucial; the switch panel crashworthiness area, focusing on the switch panel on the upper body of the door panel, examines whether it will fly out during a collision. If the switch panel is dislodged and ejected due to a collision, it could potentially strike passengers, potentially causing secondary injuries. This is a key area of consideration for evaluating the door guard's crashworthiness. In the chest impact buckle area, the secondary explosion-proof buckle 270 is located between the door sheet metal and the door guard. In the event of an impact, this secondary explosion-proof buckle 270 secures the door guard, preventing it from intruding too far. The chest impact buckle's effectiveness is critical. During a collision, the proper functioning of the chest impact buckle plays a crucial role in preventing chest damage from the door guard and other components. Failure to function effectively may prevent component displacement, increasing the risk of injury. In the crash box area, the effectiveness of the crash box's collapse is evaluated. The crash box absorbs and converts energy during a collision. Its collapse directly determines whether it effectively reduces the amount of collision energy transferred to the vehicle interior, mitigating the impact on passengers. Therefore, the energy absorption performance of this area is crucial. In the crashworthiness area of the side curtain airbag's anti-collision buckle, this module focuses on preventing the door guard panel from separating from the sheet metal upright. The side curtain airbag plays an important role in the vehicle's safety protection system, and the crashworthiness of its anti-collision buckle is related to whether it can maintain a stable connection between the door guard panel and the sheet metal upright. If separation occurs, it may affect the normal function of the side curtain airbag and will also have an adverse effect on the overall crashworthiness of the door guard panel. In the crashworthiness area of the B-pillar, the module examines the impact of the B-pillar's energy absorption and deformation on the energy transfer of the door guard panel. As an important energy-absorbing and force-transmitting component of the vehicle body, the B-pillar's energy absorption and deformation during a collision will change the energy transfer path and size, thereby affecting the energy received by the door guard panel. Understanding this impact is of great significance for comprehensively evaluating the crashworthiness of the door guard panel and optimizing the overall vehicle safety design. In the crashworthiness area of the subwoofer, the module examines the impact of the subwoofer on the energy transfer of the door guard panel.While the woofer may not appear to be a critical crashworthiness component, its structural characteristics and mounting position can affect energy transfer to the door trim during a collision, ultimately impacting energy distribution throughout the entire door trim and even within the cabin. Therefore, it is included in the door trim crashworthiness performance breakdown. By meticulously examining and analyzing these eight components of door trim crashworthiness, we can more comprehensively and accurately assess the door trim's crashworthiness performance under various crash scenarios, providing a reliable basis for subsequent product optimization and safety enhancements, minimizing secondary injuries to occupants.

[0074] It is understood that intrusion blocks are positioned according to the maximum intrusion energy area of each of the eight aforementioned modules corresponding to the door sheet metal, and the material selection of the intrusion blocks is consistent with that of each module to ensure accuracy. Specifically, a handle intrusion block 220 is positioned in the handle decoration area; an armrest intrusion block 230 is positioned in the armrest impact area; an upper body intrusion block 210 is positioned in the switch panel impact area; an energy absorption box intrusion block 240 is positioned in the energy absorption box area; and a speaker grille intrusion block 250 is positioned in the woofer impact area. The Y-direction intrusion amount and intrusion speed of each intrusion block can be adjusted based on the actual vehicle conditions. The Y-direction is perpendicular to the door sheet metal. During simulation tests, a servo cylinder applies an impact force to the loading block 260 of the test bench 200, transmitting the impact force to each of the aforementioned intrusion blocks to simulate damage to the door guard plate during a side impact.

[0075] In some examples, the restraint blocks include: a B-pillar guard restraint block, a simulated chest restraint block, a simulated abdomen restraint block, and a simulated pelvic restraint block.

[0076] It's understandable that the simulated chest, abdomen, and pelvis restraints can be used to simulate the areas of the passenger most vulnerable to side impact from the door guard, eliminating the need for a full-body dummy and saving costs. The B-pillar guard restraint block simulates the blocking effect of the B-pillar. By setting precise constraints, the stress and deformation environment of the door guard assembly during actual vehicle use can be more realistically simulated, providing a more realistic theoretical basis and technical support for stiffness analysis, material selection, and structural optimization, helping to improve the safety and stability of the entire vehicle cabin in the event of collisions and other unexpected situations.

[0077] Step S150: constructing a door guard panel side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block.

[0078] Step S150 includes step S1501 and step S1502.

[0079] Wherein, step S1501 is to obtain the rigidity coefficient and force-bearing area of the intrusion block at different positions.

[0080] It's understood that intrusion blocks can be made of different materials depending on the function of the simulated area and the force transmission path. Each material has a specific stiffness coefficient, and each intrusion block corresponds to a different force-bearing area. By obtaining the stiffness coefficient and force-bearing area of intrusion blocks at different locations, intrusion data for each intrusion block can be analyzed specifically to improve accuracy.

[0081] Step S1502 is to construct the door guard plate side intrusion model according to the intrusion energy obtained from the door sheet metal intrusion energy finite element model, the rigidity coefficient and the force-bearing area.

[0082] It can be understood that the above parameter relationships are as follows:

[0083] Based on the door sheet metal intrusion energy finite element model, calculate the displacement x of the intrusion block in different parts

[0084] Where k is the stiffness coefficient of the material.

[0085] According to the displacement of different parts of the intrusion block, the pressure value p of different parts of the intrusion block is constructed

[0086]

[0087] Where A is the force-bearing area of the intrusion block.

[0088] Step S160: Compare the actual pressure value applied by the above-mentioned intrusion block to the corresponding constraint block with the simulated pressure value obtained by the above-mentioned door guard panel side intrusion model; wherein, when the difference between the above-mentioned actual pressure value and the above-mentioned simulated pressure value is greater than or equal to the preset difference, the above-mentioned door guard panel side intrusion model is corrected according to the condition parameters of the above-mentioned door guard panel side impact test simulated by the test bench 200.

[0089] After the test bench 200 is subjected to a simulated door guard panel side collision test, the actual pressure value applied by the intrusion block to the corresponding constraint block can be obtained. The simulated pressure value can be obtained through the door guard panel side intrusion model, and the actual pressure value and the simulated pressure value are compared. According to the comparison result, it is confirmed whether the door guard panel side intrusion model is constructed accurately. Specifically, when the difference between the actual pressure value and the simulated pressure value is greater than or equal to the preset difference, it means that the deviation of the door guard panel side intrusion model is large, and the door guard panel side intrusion model needs to be corrected according to the condition parameters of the side collision simulation test of the bench 200. For example, the door guard panel side intrusion model can be corrected according to the actual parameters such as the material and force area of the intrusion block in the side collision simulation test of the bench 200, so as to ensure the accuracy of the door guard panel side intrusion model, thereby realizing the optimization of the door guard panel side intrusion model.

[0090] In some examples, the method for optimizing the door guard panel side intrusion model further includes optimizing the door guard panel side intrusion model according to an actual pressure value of the intrusion block on the constraint block.

[0091] It is understandable that after the door guard panel side intrusion model is corrected according to the conditional parameters of the door guard panel side impact test simulated by the test bench 200, the door guard panel side intrusion model can be further optimized according to the actual pressure value of the intrusion block on the restraint block.

[0092] In some examples, the step of optimizing the door panel side intrusion model based on the actual pressure value of the intrusion block on the restraint block includes:

[0093] According to the simulation position corresponding to the above-mentioned constraint block, the preset maximum pressure value that the above-mentioned constraint block is allowed to withstand is determined; the above-mentioned actual pressure value is compared with the above-mentioned preset maximum pressure value, and when the above-mentioned actual pressure value is greater than or equal to the above-mentioned preset maximum pressure value, the material of the above-mentioned door sheet metal and / or the above-mentioned intrusion block is adjusted; the above-mentioned test bench 200 is rearranged according to the above-mentioned adjusted material, and the rearranged above-mentioned test bench 200 is subjected to a simulated door guard panel side impact test, and when the above-mentioned actual pressure value is less than the above-mentioned preset maximum pressure value, the above-mentioned adjusted material is loaded into the material library of the above-mentioned door guard panel side intrusion model.

[0094] It is understood that a preset maximum pressure value allowed for the restraint block is set based on the corresponding position of the restraint block in actual application to minimize damage to passengers in the event of a side impact. The maximum pressure value allowed for restraint blocks in different positions is different. During the door guard panel side impact test simulated on test bench 200, the actual pressure value experienced by the restraint block is collected and compared with the preset maximum pressure value. If the actual pressure value is less than the preset maximum pressure value, it indicates that the materials used for the intrusion block and the door sheet metal meet the vehicle side impact safety requirements. The material can be stored in the material library of the door guard panel side intrusion model. If the actual pressure value is greater than or equal to the preset maximum pressure value, it indicates that the materials used for the intrusion block and the door sheet metal do not meet the vehicle side impact safety requirements. The material of the intrusion block and / or the door sheet metal needs to be adjusted. After rearranging test bench 200, simulated door guard panel side impact tests are performed on the rearranged test bench 200, and the actual pressure value of the restraint block is obtained until the actual pressure value is less than the preset maximum pressure value. The modified material is then loaded into the material library of the door guard panel side intrusion model to further optimize the door guard panel side intrusion model.

[0095] It should be noted that some lightweight polymer composite materials, despite their low density, may possess good elasticity and a certain degree of energy absorption, making them suitable for use in door guard panel trim assemblies where weight is a concern while also requiring a certain degree of energy absorption and cushioning. Certain metal alloys, however, possess higher strength and rigidity, making them more suitable for areas subject to high impact forces and requiring strict control of deformation. By comprehensively considering various factors, including the functional positioning, cost, and aesthetics of the door guard panel trim assembly, and incorporating the predetermined maximum pressure allowed by the defined restraint block, the most suitable material was selected from a wide range of candidate materials to ensure that the door guard panel trim assembly not only meets the decorative requirements of the vehicle interior, but also demonstrates good rigidity and energy absorption in the event of a collision or other unexpected situation, working in conjunction with the door sheet metal to ensure the safety of the vehicle occupants.

[0096] like Figure 4 As shown, according to the second aspect of the present application, an optimization device for a door guard plate side intrusion model is proposed, comprising:

[0097] The first construction unit 21 is used to construct a door sheet metal finite element model according to the vehicle side impact test;

[0098] An analysis unit 22 is configured to analyze the distribution of stress and strain at various locations of the door sheet metal according to a simulation process of the door sheet metal finite element model under different loading conditions;

[0099] a determination unit 23 for determining a region of maximum intrusion deformation of the door sheet metal according to the distribution of stress and strain at various locations of the door sheet metal;

[0100] A second construction unit 24 is configured to obtain a door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block;

[0101] The test unit 25 is used to set an intrusion block at a corresponding position on the test bench 200 based on the maximum intrusion energy area of the vehicle door sheet metal, and to set a constraint block at a corresponding position on the test bench 200 based on the vehicle structure, so as to add constraint conditions to the simulated door guard panel side impact, and to apply an impact force to the loading block 260 of the test bench 200 to simulate the door guard panel side impact;

[0102] The comparison and correction unit 26 is used to compare the actual pressure value applied by the above-mentioned intrusion block to the corresponding constraint block and the simulated pressure value obtained by the above-mentioned door guard panel side intrusion model; wherein, when the difference between the above-mentioned actual pressure value and the above-mentioned simulated pressure value is greater than or equal to the preset difference, the above-mentioned door guard panel side intrusion model is corrected according to the condition parameters of the above-mentioned door guard panel side impact test simulated by the test bench 200.

[0103] like Figure 5As shown, an electronic device proposed according to the third aspect of the embodiment of the present application includes a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any of the above-mentioned methods for door panel vibration durability verification are implemented.

[0104] In the specific implementation process, the computer program 311 can be implemented when executed by the processor Figure 1 Any implementation manner in the corresponding embodiments.

[0105] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0106] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0110] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are run on a processing device, the processing device executes the optimization process of the door panel side intrusion model in the corresponding embodiment.

[0111] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0112] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0114] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0115] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0116] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0117] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A door panel side intrusion model optimization method, characterized in that: include: Based on the vehicle side impact test, a finite element model of the door sheet metal intrusion energy was constructed; Analyzing the distribution of stress and strain at various locations of the door sheet metal according to the simulation process of the door sheet metal intrusion energy finite element model under different loading conditions; Determining a maximum intrusion energy region of the door sheet metal according to the distribution of stress and strain at various locations of the door sheet metal; According to the maximum intrusion energy area of the door sheet metal, an intrusion block is set at the corresponding position of the test bench, and according to the vehicle structure, a constraint block is set at the corresponding position of the test bench to add constraint conditions to the simulated door guard panel side impact, and an impact force is applied to the loading block of the test bench to simulate the door guard panel side impact situation; Constructing a door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block; comparing an actual pressure value applied by the intrusion block to the corresponding restraint block with a simulated pressure value obtained by the door guard plate side intrusion model; Wherein, when the difference between the actual pressure value and the simulated pressure value is greater than or equal to the preset difference, the door guard panel side intrusion model is corrected according to the condition parameters of the door guard panel side impact test simulated by the bench.

2. The door panel side intrusion model optimization method according to claim 1, characterized in that: Also includes: The door guard plate side intrusion model is optimized according to the actual pressure value of the intrusion block on the restraint block.

3. The door panel side intrusion model optimization method according to claim 1, characterized in that: The step of optimizing the door guard plate side intrusion model according to the actual pressure value of the intrusion block on the restraint block includes: Determining a preset maximum pressure value that the constraint block is allowed to withstand according to the simulation part corresponding to the constraint block; comparing the actual pressure value with the preset maximum pressure value, and adjusting the material of the door sheet metal and / or the intrusion block if the actual pressure value is greater than or equal to the preset maximum pressure value; The test bench is rearranged according to the adjusted material, and a simulated door panel side impact test is performed on the rearranged test bench. When the actual pressure value is less than the preset maximum pressure value, the adjusted material is loaded into the material library of the door panel side intrusion model.

4. The door panel side intrusion model optimization method according to claim 1, characterized in that: The steps of constructing a finite element model of door sheet metal intrusion energy based on the vehicle side impact test include: Obtaining, based on a side impact test of a vehicle, the initial kinetic energy of the vehicle, the energy loss of the vehicle due to air resistance and collision angle, and the energy consumption value of the vehicle due to external forces during the collision; A finite element model of the door sheet metal intrusion energy is constructed based on the initial kinetic energy of the vehicle, the energy loss of the vehicle due to air resistance and collision angle, and the energy consumption value of the external force acting on the vehicle during the collision.

5. The door panel side intrusion model optimization method according to claim 4, characterized in that: The step of constructing a door guard plate side intrusion model according to the door sheet metal intrusion energy finite element model and the material parameters of the intrusion block comprises: Obtaining the stiffness coefficient and force-bearing area of the intrusion block at different positions; The door panel side intrusion model is constructed based on the intrusion energy, the rigidity coefficient and the force-bearing area obtained from the door sheet metal intrusion energy finite element model.

6. The door panel side intrusion model optimization method according to claim 1, characterized in that: The intrusion block includes: The door guard plate includes an upper body intrusion block, a handle intrusion block, an armrest intrusion block, an energy absorption box intrusion block and a speaker grille intrusion block.

7. The door panel side intrusion model optimization method according to claim 1, characterized in that: The constraint block includes: B-pillar guard plate restraint block, simulated chest restraint block, simulated abdomen restraint block and simulated pelvic restraint block.

8. An optimization device for a door guard plate side intrusion model, characterized in that: include: The first construction unit is used to construct a door sheet metal finite element model according to a full vehicle side impact test; an analysis unit, configured to analyze the distribution of stress and strain at various locations of the door sheet metal according to a simulation process of the door sheet metal finite element model under different loading conditions; a determination unit, configured to determine an area of maximum intrusion deformation of the door sheet metal according to a distribution of stress and strain at various locations of the door sheet metal; A test unit, configured to set intrusion blocks at corresponding positions on a test bench based on the maximum intrusion energy area of the door sheet metal, and to set constraint blocks at corresponding positions on the test bench based on the entire vehicle structure, so as to add constraint conditions to the simulated door guard panel side impact, and to apply an impact force to the loading block of the test bench to simulate the door guard panel side impact; a second construction unit, configured to obtain a door guard plate side intrusion model based on the door sheet metal intrusion energy finite element model and material parameters of the intrusion block; A comparison and correction unit is used to compare the actual pressure value applied by the intrusion block to the corresponding constraint block with the simulated pressure value obtained by the door guard panel side intrusion model; wherein, when the difference between the actual pressure value and the simulated pressure value is greater than or equal to a preset difference, the door guard panel side intrusion model is corrected according to the condition parameters of the door guard panel side impact test simulated by the bench.

9. An electronic device comprising: A memory and a processor, wherein the processor is configured to implement the steps of the door guard panel side intrusion model optimization method according to any one of claims 1 to 7 when executing a computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for optimizing the door trim panel side intrusion model according to any one of claims 1 to 7 is implemented.

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