A vehicle front structure design method and system, electronic device and storage medium

Abstract

This invention provides a vehicle forward structural design method, system, electronic device, and storage medium. The vehicle forward structural design method includes the following steps: S1: Constructing the F-S curve for a side pole collision of the vehicle; S2: Designing the corresponding structural components of the vehicle based on the F-S curve to obtain the force transmission path and structure-related data of the corresponding structural components; S3: Using the force transmission path and structure-related data of the corresponding structural components, performing finite element modeling, conducting simulation analysis of the side pole collision safety, and evaluating whether the intrusion displacement S1 along the force transmission path of the corresponding structural component obtained from the simulation analysis meets the preset intrusion displacement S requirement. If it meets the requirement, the vehicle structural design is completed; if it does not meet the requirement, returning to S1 and re-executing S1-S3. This invention enables accurate completion of vehicle structural design under the guidance of the theoretical F-S curve of a side pole collision.

Description

Technical Field

[0001] This invention relates to the field of vehicle structural design technology, and in particular to a vehicle forward structural design method, system, electronic device, and storage medium. Background Technology

[0002] With social development, my country's new energy electric vehicle industry is developing very rapidly. At the same time, the high-voltage safety requirements for electric vehicle batteries are also becoming increasingly stringent. In side collisions, especially the 32km / h pole impact test of the C-NCAP 2021 version, in addition to requiring minimal vehicle deformation to ensure occupant survival space, the battery must not catch fire, explode, release toxic or harmful gases, or arc during the impact test. The impact resistance of the vehicle body assembly, especially its impact resistance in the direction of impact, directly determines the impact severity of the power battery pack. In other words, the impact resistance of the vehicle body assembly is closely related to the safety of the power battery system.

[0003] In the existing technology, when designing the structure of a vehicle, the lack of theoretical reference values ​​leads to the design being carried out without guidance and under conditions of extensive trial and error. This results in low efficiency, high development costs, and long development cycles for automotive structural design. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a vehicle forward structural design method, system, electronic device and storage medium to solve the problems of inaccurate vehicle structural design, low structural design efficiency and high development cost in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a method for designing a vehicle's forward structure, characterized by comprising the following steps:

[0006] S1: Construct the scenario where the vehicle experiences a side pole collision. curve;

[0007] S2: According to the above The curve guides the design of the corresponding structural components of the vehicle to obtain the force transmission path and structural data of the corresponding structural components;

[0008] S3: Using the force transmission path of the corresponding structural component and the structure-related data, perform finite element modeling to conduct a simulation analysis of the side column collision safety, and evaluate the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. Does it meet the preset intrusion displacement? If the requirements are met, the structural design of the vehicle is completed; otherwise, return to step S1 and repeat steps S1-S3.

[0009] In one embodiment of the present invention, S1 includes:

[0010] S11: Determine the maximum energy absorbed by the vehicle during the side pole collision. ;

[0011] S12: Determine at least two energy-absorbing regions along the force transmission path from the gate to the battery pack cell, and the energy absorption distribution ratio of each energy-absorbing region, thereby determining the energy absorption capacity of each energy-absorbing region. ;

[0012] S13: Determine the crushing ratio corresponding to each energy-absorbing region. and using the crushing ratio To calculate the intrusion displacement corresponding to the energy absorption region. ;

[0013] S14: Based on the energy absorbed by each of the energy-absorbing regions. and the corresponding intrusion displacement The average crushing force borne by each energy-absorbing region was calculated. Thus, the side pillar collision is obtained. curve.

[0014] In one embodiment of the present invention, in S11, the maximum absorbed energy Wherein, the maximum absorbed energy Velocity after collision Zero rotational speed Zero and maintaining initial velocity The maximum kinetic energy during the side-pillar collision under the specified conditions. For the quality of the whole vehicle test, Let represent the vehicle's moment of inertia.

[0015] In one embodiment of the present invention, in step S12, each of the energy-absorbing regions is responsible for absorbing energy. and the maximum absorbed energy The relationship is satisfied as follows: .

[0016] In one embodiment of the present invention, in S12, the energy-absorbing region of the force transmission path from the door to the battery pack cell includes: a first energy-absorbing region corresponding to the force transmission path from the door to the outside of the threshold, a second energy-absorbing region corresponding to the force transmission path from the outside of the threshold to the inside of the threshold, a third energy-absorbing region corresponding to the force transmission path from the inside of the threshold to the outside of the battery pack, and a fourth energy-absorbing region corresponding to the force transmission path from the outside of the battery pack to the outside of the battery pack cell.

[0017] In one embodiment of the present invention, if S1-S3 are re-executed after S3, then in S13, the crushing ratio corresponding to each energy-absorbing region is determined based on the crushing ratio database obtained from simulation experiments of various vehicle models and materials. .

[0018] In one embodiment of the present invention, in S13, the intrusion displacement The calculations include:

[0019] Obtain the length corresponding to each of the energy-absorbing regions. According to the length Corresponding crushing ratio The intrusion displacement was calculated. = The crushing ratio The crush ratio is determined based on relevant data from a database obtained through simulation experiments of various vehicle models and materials.

[0020] In one embodiment of the present invention, the crushing ratio The crush ratio is a theoretical value determined based on the modified structural design of the vehicle. ,in, This is the theoretical value of the length of the crushed material. The length of the material before crushing.

[0021] In one embodiment of the present invention, in step S14, the average crushing force borne by each of the energy-absorbing regions is... .

[0022] In one embodiment of the present invention, in step S3, the simulation analysis of the side pole collision is to apply a finite element method to the entire vehicle. =32 The simulation of an initial velocity and an impact direction that forms a 75° angle with the length direction of the vehicle body when impacting a stationary rigid column.

[0023] In one embodiment of the present invention, in step S3, the simulation analysis of the side pillar collision safety includes:

[0024] The intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. and average crushing force Build the corresponding The curve will be the curve and the By comparing the curves, the structural design of the structural components in the corresponding energy-absorbing regions is modified to strengthen or weaken them, and the crushing ratio of each energy-absorbing region is also adjusted accordingly. So that each of the energy-absorbing regions is corresponding to the The curve portion is adjusted to match the... The curves are consistent.

[0025] In one embodiment of the present invention, the displacement of the force transmission path under simulation is... The crushing force and stated The acquisition of the curve includes:

[0026] Read the crush force and time curve of the rigid column on the vehicle. A reference coordinate is set on the outer side of the end of the force transmission path to read the displacement and time of the rigid column. The curve, and thus the curve. curve.

[0027] In one embodiment of the present invention, in step S3, the intrusion displacement along the force transmission path of the corresponding structural member obtained from the simulation analysis is evaluated. Does it meet the preset intrusion displacement? Requirements include:

[0028] Before the preceding energy-absorbing region is fully deformed, assess whether the subsequent energy-absorbing region meets the requirement of not deforming.

[0029] In one embodiment of the present invention, in step S3, the intrusion displacement along the force transmission path of the corresponding structural member obtained from the simulation analysis is evaluated. Does it meet the preset intrusion displacement? The requirements also include:

[0030] Assess the average crushing force of the energy-absorbing region described later. Compared with the average crushing force of the previous energy absorption region ratio Does it meet the requirements? Requirements.

[0031] The present invention also provides a vehicle forward structure design system, characterized in that it includes:

[0032] Build module, the The building module constructs the vehicle's side pole collision. curve;

[0033] Structural design module, the structural design module according to the The curve guides the design of the corresponding structural components of the vehicle to obtain the force transmission path and structurally related data of the corresponding structural components; and

[0034] The evaluation module uses the force transmission path of the corresponding structural component and the structure-related data to perform finite element modeling, conducts simulation analysis of the side column collision safety, and evaluates the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. Does it meet the preset intrusion displacement? The requirement is to determine whether the structural design of the vehicle has been completed.

[0035] In one embodiment of the present invention, the evaluation module includes:

[0036] The deformation data feedback module provides an alarm signal indicating that deformation of the next energy-absorbing region occurs before the previous energy-absorbing region has fully deformed; and

[0037] The crushing data feedback module provides feedback on the average crushing force of the next energy-absorbing zone. Compared with the average crushing force of the previous energy absorption region ratio = The alarm signal.

[0038] In one embodiment of the present invention, the The building blocks include:

[0039] The parameter acquisition module acquires the initial velocity of the vehicle during the collision. And the energy absorption ratio data of each energy absorption region along the force transmission path;

[0040] Energy absorption and conversion module, the energy absorption and conversion module according to the initial velocity Calculate the velocity after the collision zero and angular velocity Maximum energy absorbed below zero The energy absorption is distributed to each of the energy-absorbing regions according to the energy absorption ratio data. ;as well as

[0041] The crushing force calculation module calculates the crushing force based on the length of each energy-absorbing region. and the crushing ratio The average crushing force was calculated. and draw curve.

[0042] In one embodiment of the present invention, the structural design module includes:

[0043] Structural reinforcement modules and structural weakening modules;

[0044] When the intrusion displacement Energy absorbed in the corresponding energy-absorbing region Less than the energy absorbed by the distribution At that time, the structural reinforcement module reinforces the corresponding structural components of the vehicle.

[0045] When the intrusion displacement Energy absorbed in the corresponding energy-absorbing region Greater than the energy absorbed by the distribution At that time, the structural weakening module performs weakening design on the corresponding structural components of the vehicle.

[0046] The present invention further provides an electronic device, characterized in that it comprises:

[0047] A memory and a processor, wherein the memory stores at least one program, which is loaded and executed by the processor to implement the method described above.

[0048] The present invention further provides a computer-readable storage medium, characterized in that the storage medium stores at least one instruction, which is loaded and executed by a processor to implement the above-described method.

[0049] As described above, the vehicle forward structure design method of the present invention has the following beneficial effects:

[0050] By designing the vehicle's structural components through side-pillar impact tests, the theoretical energy absorption ratio is obtained. The curve was calculated, and the side column collision was simulated in the simulation experiment to confirm the intrusion displacement under the simulation analysis. corresponding Does it meet the requirements? If the curve does not conform, adjust the design of the reinforced or weakened structural components according to the differences, reset the crushing ratio parameters, and regenerate the curve. The curve was simulated again until the designed structural components could meet the corresponding requirements. The curves improve the accuracy of vehicle structure design, increase development efficiency, reduce development costs, and shorten the development cycle. Attached Figure Description

[0051] Figure 1 This is a flowchart of the design method of the present invention.

[0052] Figure 2 This is a flowchart illustrating the design of a side-pillar collision forward structure in a preferred embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram of the side pillar collision at 75° and its mechanics according to the present invention;

[0054] Figure 4 A schematic diagram of the energy absorption areas of the side column collision of the present invention and the corresponding displacement measurement;

[0055] Figure 5 Force displacement designed and planned for this invention Schematic diagram of the curve;

[0056] Figure 6 The crushing force and displacement constructed for this invention curve, Curve comparison and schematic diagram of each energy absorption region segment;

[0057] Figure 7 The system architecture diagram for the system designed in this invention is shown.

[0058] Component designation explanation

[0059] Rigid column center point C 35; impact point D 31; distance CD segment 30; distance DP 32; H rotating arm from impact point D to center of mass P 36; whole vehicle 40;

[0060] Rigid column 20; door 21; threshold 22; outer threshold 221; inner threshold 222; inner threshold 222; threshold aluminum material 23; outer battery pack 241; battery pack cell 251; seat crossbeam 26;

[0061] Door energy absorption space area 51; threshold energy absorption area 52; threshold to battery pack frame outer side energy absorption area 53; battery pack frame outer side to battery pack cell energy absorption area 54. Detailed Implementation

[0062] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes and not for limiting the scope of protection of the present invention. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0063] Please see Figures 1 to 7It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0064] Please see Figure 1 This invention provides a method for designing a vehicle's forward structure, comprising the following steps:

[0065] S1: Construct a scenario where the vehicle experiences a side pole collision. curve;

[0066] S2: According to Curves guide the design of corresponding structural components of the vehicle to obtain the force transmission path and structural data of the corresponding structural components;

[0067] S3: Using the force transmission path and structural data of the corresponding structural components, perform finite element modeling, conduct simulation analysis of side column collision safety, and evaluate the intrusion displacement along the force transmission path of the corresponding structural components obtained from the simulation analysis. Does it meet the preset intrusion displacement? If the requirements are met, the vehicle's structural design is completed; otherwise, return to S1 and repeat S1-S3.

[0068] In this embodiment, during the vehicle structural design process based on the vehicle side pole collision data, the side pole collision data corresponding to the structural component design data is obtained by using the initial design data of the vehicle's structural components. The curve is used to realize finite element modeling based on the force transmission path and structural design data of vehicle structural components. After modeling, a side pillar impact simulation test is carried out to evaluate the intrusion displacement. Below Does it conform to the construction? If the curve conforms to the design, the vehicle's structural design is complete; otherwise, the structural design needs to be readjusted, and a new side pole collision test needs to be established based on the revised design. The curve is then analyzed using finite element modeling and simulation based on the newly adjusted structural design, until the intrusion displacement is reached. Below Conforming to the construction Curves complete the structural design.

[0069] Among them, the vehicle forward structural design is a structural design carried out through the normal design sequence.

[0070] Please also refer to Figure 1 and 2 In a preferred embodiment of the present invention, S1 further includes:

[0071] S11: Determine the maximum energy absorbed by the vehicle in a side pole collision. ;

[0072] S12: Determine at least two energy-absorbing regions along the force transmission path from gate 21 to battery pack cell 25, and the energy absorption distribution ratio of each energy-absorbing region, thereby determining the energy absorption capacity of each energy-absorbing region. ;

[0073] S13: Determine the crushing ratio corresponding to each energy-absorbing zone. and using crush ratio To calculate the intrusion displacement corresponding to the energy absorption region. ;

[0074] S14: Based on the energy absorbed by each energy-absorbing region. and the corresponding intrusion displacement The average crushing force borne by each energy-absorbing region was calculated. Thus, the side pillar collision is obtained. curve.

[0075] In one embodiment of the present invention, a side pillar collision is constructed. When navigating a curve, the maximum kinetic energy absorbed during a side pole collision is determined by finding that the vehicle's velocity and angular velocity are both zero after the collision. The energy absorption of each energy-absorbing region is determined by dividing the energy absorption area along the force transmission path from gate 21 to battery cell 25. Then, based on the crushing ratio determined during the structural design process... By combining the length of the energy absorption zone from gate 21 to battery cell 25, the intrusion displacement corresponding to the energy absorption zone can be obtained. Then, based on the energy absorbed by each energy absorption region... This leads to the average crushing force, and thus the side column collision. curve.

[0076] like Figure 3 As shown, in S11, the maximum absorbed energy Among them, the maximum absorbed energy Velocity after collision Zero rotational speed Zero and maintaining initial velocity The maximum kinetic energy during a side-pillar collision under certain conditions. For the quality of the whole vehicle test, Let represent the vehicle's moment of inertia.

[0077] In one embodiment of the present invention, according to the formula Therefore, the velocity after the collision Zero and rotational speed When the initial velocity is zero (i.e., just hitting the center of mass at point P, with H rotating arm = 0), the initial velocity at this point is... The resulting kinetic energy This is the maximum energy absorbed by the vehicle. .

[0078] In S12, each energy-absorbing region is responsible for absorbing energy. and maximum absorbed energy The relationship is satisfied as follows: In other words, energy is absorbed only in each energy-absorbing region. The sum is less than or equal to In simulation tests, it can be ensured that the collision intrusion of the side pillars after structural design will not reach the inner area of ​​the battery pack cells.

[0079] exist After constructing the curve, finite element modeling was performed on the vehicle structural design data, and a side pole impact simulation was conducted to obtain the intrusion displacement on the force transmission path under the simulation. and average crushing force And thus obtain curve and Compare the curves to determine the differences. The curve satisfies When the curve is being processed, the design results are output. If the results are not met, the vehicle structure is redesigned and adjusted. The crush ratio is then corrected based on the structural design. After correction, the energy absorption ratio of the energy absorption area is redistributed, and the finite element modeling and simulation are re-done.

[0080] In S3, the side pole collision simulation analysis is performed using the finite element method for the entire vehicle according to the C-NCAP 2021 rules. =32 The simulation was conducted by impacting a stationary rigid pole with an initial velocity and an impact direction that makes a 75° angle with the length direction of the vehicle body; the simulation method is the side impact test of 32km / h in the C-NCAP 2021 version.

[0081] In S3, the simulation analysis of side pillar collision safety includes:

[0082] The intrusion displacement along the force transmission path of the corresponding structural component is obtained from simulation analysis. and average crushing force Build the corresponding The curve will curve and By comparing the curves, the structural design of the structural components in the corresponding energy-absorbing regions was adjusted to strengthen or weaken them, and the crushing ratio of each energy-absorbing region was also adjusted accordingly. This makes each energy-absorbing region corresponding to Adjust the curve section to match The curves are consistent.

[0083] Displacement of the force transmission path under simulation Crushing force and The acquisition of the curves includes: reading the crushing force and time curve of the rigid column on the vehicle. A reference coordinate system is set on the outer side of the end of the force transmission path to read the displacement and time of the rigid column 20. Curve, and thus obtain curve.

[0084] In S3, the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis is evaluated. Does it meet the preset intrusion displacement? The requirements include: assessing whether the next energy-absorbing region meets the requirement of not deforming before the previous energy-absorbing region is fully deformed.

[0085] In one embodiment of the present invention, in order to better ensure that each energy-absorbing region does not affect each other during crushing deformation, it is necessary to evaluate whether the next energy-absorbing region is affected before the previous energy-absorbing region is completely deformed. For example, when crushing to the outside of the battery pack, in order to ensure that the battery pack cells are not affected, it is necessary that the battery pack cells 25 are not affected before the battery pack cells 25 are completely crushed and deformed from the outside of the battery pack 241 to the outside of the battery pack cells 251.

[0086] In S3, the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis is evaluated. Does it meet the preset intrusion displacement? The requirements also include: assessing the average crushing force of the subsequent energy-absorbing zone. Compared with the average crushing force of the previous energy absorption region ratio Does it meet the requirements? Requirements.

[0087] In one embodiment of the present invention, the average crushing force of each energy-absorbing region also needs to be evaluated during the evaluation process. In cases where, for example, the average crushing force from door 21 to the outer edge of the threshold 221 is... The average crushing force from the outer side 221 to the inner side 222 of the threshold is The distance from the inner side of the threshold 222 to the outer side of the battery pack 241 is... The outer side of the battery pack 241 to the battery pack cell 25 is Then an assessment is needed. / , / , / Whether it is ∈ [1.2, 1.5] is used to determine the intrusion displacement of the force transmission path of the corresponding structural component. Does it meet the preset intrusion displacement? Require.

[0088] like Figure 4 As shown in S12, the energy absorption area of ​​the force transmission path from door 21 to battery pack cell 25 includes: a first energy absorption area corresponding to the force transmission path from door 21 to the outer side 221 of the threshold, a second energy absorption area corresponding to the force transmission path from the outer side 221 of the threshold to the inner side 222 of the threshold, a third energy absorption area corresponding to the force transmission path from the inner side 222 of the threshold to the outer side 241 of the battery pack, and a fourth energy absorption area corresponding to the force transmission path from the outer side 241 of the battery pack to the outer side 251 of the battery pack cell.

[0089] In one embodiment of the present invention, when the rigid column 20 collides with a vehicle, a first energy-absorbing region is formed along the force transmission path. Second energy absorption zone Third energy absorption zone and the fourth energy absorption region .

[0090] If S1-S3 are re-executed after S3, then in step S13, the crushing ratio corresponding to each energy-absorbing region is determined based on the crushing ratio database obtained from simulation experiments of various vehicle models and materials. .

[0091] like Figure 5 As shown, in S13, the intrusion displacement The calculations include: obtaining the length of each energy-absorbing region. According to length Corresponding crushing ratio The intrusion displacement was calculated. = Among them, the crushing ratio The crush ratio is determined based on relevant data from a database obtained through simulation experiments of various vehicle models and materials.

[0092] In one embodiment of the present invention, during the process of determining the intrusion displacement of each energy-absorbing region, the crushing ratio corresponding to the first energy-absorbing region is: The crushing ratio corresponding to the second energy absorption zone is The crushing ratio corresponding to the third energy absorption zone is The crushing ratio corresponding to the fourth energy absorption zone is Therefore, the intrusion displacements corresponding to each region are respectively , , , And the energy absorbed by each energy-absorbing region is respectively = , = , = , = .

[0093] Crushing ratio The crush ratio is a theoretical value determined based on the modified structural design of the vehicle. ,in, This is the theoretical value of the material length after crushing. The length of the material before it was crushed.

[0094] Specifically, in the finite element modeling process, the 3D data of the entire vehicle 40 is used to create finite element meshes according to subsystem assemblies (such as body-in-white, opening and closing components, chassis, powertrain, etc.). Each structural component is assigned a corresponding material and thickness. After the mesh modeling is completed, the subsystem assemblies are connected, and then the entire vehicle is assembled and its weight is set. The finite element model needs to be set to output the contact force and deformation animation files between the entire vehicle 40 and the rigid pillar 20. During the crash test, the finite element model of the entire vehicle 40 is given an initial velocity of 32 km / h and an impact direction with an angle of 75° to the X direction to impact the rigid pillar 20. The rigid pillar 20 is fixed, and the DYNA software is used to perform explicit dynamic simulation analysis. After the analysis and calculation are completed, the contact force-time curve between the entire vehicle and the rigid pillar is read. Define a local coordinate system on the non-collision side and read the vehicle's displacement time in the Y direction. Curve, then by displacement The x-axis is... Using the ordinate, we obtain curve.

[0095] In S14, according to the formula This is then converted into the average crushing force borne by each energy-absorbing region. .

[0096] like Figure 6 As shown, according to The curve shows the corresponding curves for each energy absorption region. The curve is calculated, and the vehicle structural components are designed accordingly based on the differences in each energy-absorbing region, thereby ensuring that each energy-absorbing region corresponds to... The curve gradually tends to Curves are used to complete the structural design.

[0097] like Figure 7 As shown, the present invention also provides a vehicle forward structure design system, comprising: Module building The building block constructs a vehicle that has experienced a side pole collision. Curve; Structural design module, the structural design module is based on The system guides the design of corresponding vehicle structural components to obtain force transmission paths and structurally relevant data. An evaluation module uses this data to perform finite element modeling, conducts side-pillar collision safety simulation analysis, and evaluates the intrusion displacement along the force transmission path of the corresponding structural component. Does it meet the preset intrusion displacement? The requirement is to determine whether the vehicle's structural design has been completed.

[0098] The evaluation module includes: a deformation data feedback module, which provides an alarm signal indicating deformation of the next energy-absorbing area before the previous energy-absorbing area is fully deformed; and a crushing data feedback module, which provides the average crushing force of the next energy-absorbing area. Compared with the average crushing force of the previous energy absorption region ratio = The alarm signal.

[0099] In one embodiment of the present invention, when the evaluation module performs side pillar collision simulation analysis, it can promptly report through the deformation data feedback module the situation where, before the previous energy-absorbing area is completely crushed during vehicle structural design, it comes into contact with the next energy-absorbing area and causes the next energy-absorbing area to deform.

[0100] The construction module includes: a parameter acquisition module, which collects the initial velocity of the vehicle during the collision. And the energy absorption ratio data of each energy absorption region along the force transmission path; the energy absorption conversion module, which converts energy based on the initial velocity. Calculate the velocity after the collision zero and angular velocity Maximum energy absorbed below zero And distribute the absorbed energy to each energy absorption area according to the energy absorption ratio data. ; and a crushing force calculation module, which calculates the crushing force based on the length of each energy-absorbing region. and the crushing ratio The average crushing force was calculated. and draw curve.

[0101] In one embodiment of the present invention, the initial speed at the time of vehicle collision can be set according to preset needs, and the energy absorption ratio corresponding to each energy absorption area can be determined according to the specific vehicle structure design. Furthermore, based on the energy absorption ratio and the maximum absorbed energy... The energy absorbed in each energy-absorbing region is calculated and divided to obtain the average crushing force of each energy-absorbing region.

[0102] The structural design module includes: a structural strengthening module and a structural weakening module; when intrusive displacement... Energy absorption in the corresponding energy absorption region Less than the energy absorbed by the distribution At that time, the structural reinforcement module strengthens the corresponding structural components of the vehicle; when intrusive displacement occurs... Energy absorption in the corresponding energy absorption region Greater than the energy absorbed by the distribution At that time, the structural weakening module performs weakening design on the corresponding structural components of the vehicle.

[0103] In one embodiment of the present invention, in order to better realize the structural design of the vehicle, by utilizing structural strengthening modules and structural weakening modules, the intrusion displacement can be calculated in the system. Energy absorption in the corresponding energy absorption region and the distribution of absorbed energy After determining the size relationship between them, the structure can be quickly strengthened or weakened. For example, the structure can be strengthened by adding material to the structural components in the energy-absorbing area, and weakened by reducing the material of the structural components in the energy-absorbing area.

[0104] The present invention further provides an electronic device, comprising: a memory and a processor, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the aforementioned method. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.

[0105] The present invention further provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the aforementioned method.

[0106] In summary, this invention distributes the energy absorbed by each energy-absorbing region based on the structural design of the vehicle, adjusts it according to the crush ratio after the structural design, and then, based on the length of the energy-absorbing space, derives the relationship between the average crush force and the intrusion displacement. The curve was obtained, and finite element modeling was performed using the data from the structural component design. Side column collision simulation tests were then conducted to determine the intrusion displacement under simulation. Formed Does the curve correspond to The curves show differences, and based on these differences, the structural components are designed to be strengthened or weakened. The crushing ratio is then readjusted based on the strengthening or weakening of the structural components until... The curve reached The design requirements of the curve are met, and through simulation analysis, it is possible to observe whether the complete crushing of the previous energy-absorbing region affects the subsequent energy-absorbing region, and the relationship between the average crushing force of the previous energy-absorbing region and the average crushing force of the subsequent energy-absorbing region, so as to adjust and improve the design of the corresponding structural components. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0107] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for forward structural design of a vehicle, characterized in that, Includes the following steps: S1: Construct the scenario where the vehicle experiences a side pole collision. curve; S2: According to the above The curve guides the design of the corresponding structural components of the vehicle to obtain the force transmission path and structural data of the corresponding structural components; S3: Using the force transmission path of the corresponding structural component and the structure-related data, perform finite element modeling to conduct a simulation analysis of the side column collision safety, and evaluate the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. Does it meet the preset intrusion displacement? If the requirements are met, the structural design of the vehicle is completed; otherwise, return to step S1 and repeat steps S1-S3. S1 includes: S11: determining the maximum energy absorbed by the vehicle during the side pole collision. ; S12: Determine at least two energy-absorbing regions along the force transmission path from the gate to the battery pack cell, and the energy absorption distribution ratio of each energy-absorbing region, thereby determining the energy absorption capacity of each energy-absorbing region. ; S13: Determine the crushing ratio corresponding to each energy-absorbing region. and using the crushing ratio To calculate the intrusion displacement corresponding to the energy absorption region. Crushing ratio The crush ratio is a theoretical value determined based on the modified structural design of the vehicle. ,in, This is the theoretical value of the material length after crushing. The length of the material before it collapsed; S14: Based on the energy absorbed by each of the energy-absorbing regions. and the corresponding intrusion displacement The average crushing force borne by each energy-absorbing region was calculated. Thus, the side pillar collision is obtained. curve.

2. The vehicle forward structure design method according to claim 1, characterized in that: In S11, the maximum absorbed energy Wherein, the maximum absorbed energy Velocity after collision Zero rotational speed Zero and maintaining initial velocity The maximum kinetic energy during the side-pillar collision under the specified conditions. For the quality of the whole vehicle test, Let represent the vehicle's moment of inertia.

3. The vehicle forward structure design method according to claim 1, characterized in that: In step S12, each energy-absorbing region is responsible for absorbing energy. and the maximum absorbed energy The relationship is satisfied as follows: .

4. The vehicle forward structure design method according to claim 1, characterized in that: In step S12, the energy-absorbing region of the force transmission path from the door to the battery pack cell includes: a first energy-absorbing region corresponding to the force transmission path from the door to the outside of the threshold, a second energy-absorbing region corresponding to the force transmission path from the outside of the threshold to the inside of the threshold, a third energy-absorbing region corresponding to the force transmission path from the inside of the threshold to the outside of the battery pack, and a fourth energy-absorbing region corresponding to the force transmission path from the outside of the battery pack to the outside of the battery pack cell.

5. The vehicle forward structure design method according to claim 1, characterized in that: If S1-S3 are re-executed after S3, then in S13, the crushing ratio corresponding to each energy-absorbing region is determined based on the crushing ratio database obtained from simulation experiments of various vehicle models and materials. .

6. The vehicle forward structure design method according to claim 1, characterized in that: In S13, the intrusion displacement The calculations include: Obtain the length corresponding to each of the energy-absorbing regions. According to the length Corresponding crushing ratio The intrusion displacement was calculated. = The crushing ratio The crush ratio is determined based on relevant data from a database obtained through simulation experiments of various vehicle models and materials.

7. The vehicle forward structure design method according to claim 1, characterized in that: In step S14, each energy-absorbing region bears the average crushing force. .

8. The vehicle forward structure design method according to claim 1, characterized in that: In S3, the simulation analysis of the side pole collision is to apply the finite element method to the whole vehicle. =32 The simulation of an initial velocity and an impact direction that forms a 75° angle with the length direction of the vehicle body when impacting a stationary rigid column.

9. The vehicle forward structure design method according to claim 1, characterized in that: In S3, the simulation analysis of the side pillar collision safety includes: The intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. and average crushing force Build the corresponding The curve will be the curve and the By comparing the curves, the structural design of the structural components in the corresponding energy-absorbing regions is modified to strengthen or weaken them, and the crushing ratio of each energy-absorbing region is also adjusted accordingly. So that each of the energy-absorbing regions is corresponding to the The curve portion is adjusted to match the... The curves are consistent.

10. The vehicle forward structure design method according to claim 9, characterized in that: The simulation analysis obtains the The curve further includes: Read the crushing force and time curves of the rigid column on the vehicle during the simulation analysis. A reference coordinate system is set outside the end of the force transmission path to read the displacement and time of the rigid column during the simulation analysis. The curve, and thus the curve. curve.

11. The vehicle forward structure design method according to claim 1, characterized in that: In step S3, the evaluation involves assessing the intrusion displacement along the force transmission path of the corresponding structural member obtained from the simulation analysis. Does it meet the preset intrusion displacement? Requirements include: Before the preceding energy-absorbing region is fully deformed, assess whether the subsequent energy-absorbing region meets the requirement of not deforming.

12. The vehicle forward structure design method according to claim 11, characterized in that: In step S3, the evaluation involves assessing the intrusion displacement along the force transmission path of the corresponding structural member obtained from the simulation analysis. Does it meet the preset intrusion displacement? The requirements also include: Assess the average crushing force of the energy-absorbing region described later. Compared with the average crushing force of the previous energy absorption region ratio Does it meet the requirements? Requirements.

13. A vehicle forward structural design system, characterized in that, include: Build module, the The building block constructs a vehicle that has experienced a side pole collision. curve; Structural design module, the structural design module according to the The curve guides the design of the corresponding structural components of the vehicle to obtain the force transmission path and structural data of the corresponding structural components; as well as The evaluation module uses the force transmission path of the corresponding structural component and the structure-related data to perform finite element modeling, conducts simulation analysis of the side column collision safety, and evaluates the intrusion displacement along the force transmission path of the corresponding structural component obtained from the simulation analysis. Does it meet the preset intrusion displacement? Requirements are required to determine whether the structural design of the vehicle has been completed; The The building blocks include: The parameter acquisition module acquires the initial velocity of the vehicle during the collision. And the energy absorption ratio data of each energy absorption region along the force transmission path. The energy absorption region is determined along the force transmission path from the door to the battery pack cell, and there are at least two energy absorption regions. Energy absorption and conversion module, the energy absorption and conversion module according to the initial velocity Calculate the velocity after the collision zero and angular velocity Maximum energy absorbed below zero The absorbed energy is allocated to each of the energy-absorbing regions according to the energy absorption ratio data. ;as well as The crushing force calculation module calculates the crushing force based on the length of each energy-absorbing region. and the crushing ratio The average crushing force was calculated. and draw Curve; Crushing ratio The crush ratio is a theoretical value determined based on the modified structural design of the vehicle. ,in, This is the theoretical value of the material length after crushing. The length of the material before it was crushed.

14. The vehicle forward structural design system according to claim 13, characterized in that, The evaluation module includes: The deformation data feedback module provides an alarm signal indicating that deformation of the next energy-absorbing region occurs before the previous energy-absorbing region has fully deformed; and The crushing data feedback module provides feedback on the average crushing force of the next energy-absorbing zone. Compared with the average crushing force of the previous energy absorption region ratio = The alarm signal.

15. The vehicle forward structural design system according to claim 13, characterized in that, The structural design module includes: Structural reinforcement modules and structural weakening modules; When the intrusion displacement Energy absorbed in the corresponding energy-absorbing region Less than the energy absorbed by the distribution At that time, the structural reinforcement module reinforces the corresponding structural components of the vehicle. When the intrusion displacement Energy absorbed in the corresponding energy-absorbing region Greater than the energy absorbed by the distribution At that time, the structural weakening module performs weakening design on the corresponding structural components of the vehicle.

16. An electronic device, characterized in that, include: A memory and a processor, wherein the memory stores at least one program, which is loaded and executed by the processor to implement the method of any one of claims 1 to 12.

17. A computer-readable storage medium, characterized in that, The storage medium stores at least one instruction, which is loaded and executed by a processor to implement the method as described in any one of claims 1 to 12.

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