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CN-116341114-B - Vehicle forward structure design method, system, electronic equipment and storage medium

CN116341114BCN 116341114 BCN116341114 BCN 116341114BCN-116341114-B

Abstract

The invention provides a vehicle forward structural design method, a system, electronic equipment and a storage medium, wherein the vehicle forward structural design method comprises the following steps of S1, constructing an F-S curve of a side column collision of a vehicle, S2, guiding a corresponding structural member of the vehicle according to the F-S curve to obtain data related to a force transmission path and a structure of the corresponding structural member, S3, carrying out finite element modeling by using the data related to the force transmission path and the structure of the corresponding structural member, carrying out simulation analysis on the side column collision safety, evaluating whether an intrusion displacement S 1 along the force transmission path of the corresponding structural member obtained through the simulation analysis meets a preset intrusion displacement S requirement, if yes, finishing the structural design of the vehicle, if no, returning to the S1, and re-executing the S1-S3. The invention can accurately complete the structural design of the vehicle under the guidance of the theoretical value F-S curve of the side column collision.

Inventors

  • LIU JIANG
  • YANG ZHONG
  • LONG GUI
  • He Yancun

Assignees

  • 重庆长安新能源汽车科技有限公司

Dates

Publication Date
20260505
Application Date
20230329

Claims (17)

  1. 1. The method for designing the forward structure of the vehicle is characterized by comprising the following steps of: S1, constructing a side column collision of the vehicle A curve; s2, according to the method Curve guiding the design of the corresponding structural member of the vehicle to obtain the force transmission path and structure related data of the corresponding structural member; S3, finite element modeling is carried out by using the data related to the force transmission path and the structure of the corresponding structural member, simulation analysis of the side column collision safety is carried out, and the intrusion displacement along the force transmission path of the corresponding structural member, which is obtained by the simulation analysis, is estimated Whether or not to conform to a predetermined intrusion displacement If yes, finishing the structural design of the vehicle, and if not, returning to the step S1, and re-executing the step S1-S3; the S1 includes S11 determining a maximum absorption energy of the vehicle at which the side pillar collision occurs ; S12, determining at least two energy absorption areas along a force transmission path from the door to the battery pack battery core and the distribution proportion of the absorption energy corresponding to each energy absorption area, thereby determining the absorption energy corresponding to each energy absorption area ; S13, determining the crushing proportion corresponding to each energy absorption area And using the crushing ratio To calculate and obtain the intrusion displacement corresponding to the energy absorption area Crushing ratio For determining theoretical values, i.e. crushing ratios, based on the corrected structural design of the vehicle , wherein, For the theoretical value of the length of the material after crushing, Is the length of material before crushing; S14, correspondingly bearing the absorption energy according to each energy absorption area And corresponding said intrusion displacement Calculating to obtain the average crushing force correspondingly born by each energy absorption area Thereby obtaining the side column collision A curve.
  2. 2. The method of designing a forward structure of a vehicle according to claim 1, wherein in S11, the maximum absorption energy is calculated Wherein the maximum absorption energy Is the post-collision velocity Zero rotation speed Zero and maintain initial velocity Maximum kinetic energy of the side column during collision under the condition, The experimental quality of the whole car is that of the whole car, Is the moment of inertia of the vehicle.
  3. 3. The method for designing a forward structure of a vehicle according to claim 1, wherein in S12, each of the energy absorbing regions absorbs energy correspondingly And the maximum absorption energy The following relationships are satisfied: 。
  4. 4. the method of designing a forward structure of a vehicle according to claim 1, wherein in S12, the energy absorbing regions of the force transmitting path from the door to the battery pack cell include a first energy absorbing region corresponding to the force transmitting path from the door to the outside of the door sill, a second energy absorbing region corresponding to the force transmitting path from the outside of the door sill to the inside of the door sill, a third energy absorbing region corresponding to the force transmitting path from the inside of the door sill to the outside of the battery pack, and a fourth energy absorbing region corresponding to the force transmitting path from the outside of the battery pack to the outside of the battery pack cell.
  5. 5. The method of designing a forward structure of a vehicle according to claim 1, wherein if the S1-S3 is re-executed after the S3, the crush ratio corresponding to each energy absorbing region is determined in the S13 based on crush ratio databases obtained by statistics of simulation experiments of various vehicle models and materials 。
  6. 6. The method of designing a forward structure of a vehicle according to claim 1, wherein in S13, the intrusion displacement is calculated The calculation of (1) comprises: acquiring the length corresponding to each energy absorption area According to the length Corresponding crushing ratio Calculating the intrusion displacement = Wherein the crushing ratio And determining according to the related data in the crushing ratio database obtained through the simulation experiment statistics of various vehicle types and materials.
  7. 7. The method of designing a forward structure of a vehicle according to claim 1, wherein in S14, the average crushing force received by each energy absorbing region corresponds to the average crushing force 。
  8. 8. The method for designing a forward structure of a vehicle according to claim 1, wherein in S3, the simulation analysis of the side pillar collision is to assign a finite element vehicle as a whole =32 A simulation of a rigid column with a fixed impact in a direction having an impact direction at an angle of 75 ° to the longitudinal direction of the vehicle body.
  9. 9. The method for designing a forward structure of a vehicle according to claim 1, wherein in S3, the simulation analysis of the side pillar crash safety includes: Based on the simulation analysis, the intrusion displacement along the force transmission path of the corresponding structural member And average crushing force Building a corresponding Curve of the said Curve and the said Comparing curves, correcting, enhancing or weakening structural design of structural members of corresponding energy absorption areas, and correcting the crushing proportion of each corresponding energy absorption area The energy absorption areas are correspondingly arranged The curve part is adjusted to be in contact with the The curves are identical.
  10. 10. The method for designing a forward structure of a vehicle according to claim 9, wherein the simulation analysis obtains the forward structure of the vehicle The curve further comprises: reading the crushing force and time curve of the rigid column to the vehicle during the simulation analysis Setting reference coordinates outside the tail end of the force transmission path, and reading the displacement and time of the rigid column during the simulation analysis Curve, and thus obtain the A curve.
  11. 11. The method of designing a forward structure of a vehicle according to claim 1, wherein in S3, the evaluation of the intrusion displacement along the force transmission path of the corresponding structural member is performed by the simulation analysis Whether or not the predetermined intrusion displacement is met The requirements include: Before the front energy absorbing area is completely deformed, whether the rear energy absorbing area meets the requirement of no deformation or not is evaluated.
  12. 12. The method of designing a forward structure of a vehicle according to claim 11, wherein in S3, the evaluation of the intrusion displacement along the force transmission path of the corresponding structural member is performed by the simulation analysis Whether or not the predetermined intrusion displacement is met The requirements also include: Evaluating the average crushing force of the latter one of said energy absorbing areas Average crushing force with the previous energy absorption area Ratio of (2) Whether or not to accord with Is not limited.
  13. 13. A vehicle forward structural design system, comprising: Building up a module, said Building module for building side column collision of vehicle A curve; the structure design module is used for the design of the module, the structural design module is based on the Curve guiding the design of the corresponding structural member of the vehicle to obtain the force transmission path and structure related data of the corresponding structural member, and The evaluation module is used for carrying out finite element modeling by using the data related to the force transmission path and the structure of the corresponding structural member, carrying out simulation analysis on the side column collision safety, and evaluating the intrusion displacement along the force transmission path of the corresponding structural member, which is obtained by the simulation analysis Whether or not to conform to a predetermined intrusion displacement A request to determine whether structural design of the vehicle is complete; The said The construction module comprises: the parameter acquisition module acquires initial collision speed of the vehicle The energy absorption proportion data of each energy absorption area along the force transmission path are determined along the force transmission path from the door to the battery pack core, and the number of the energy absorption areas is at least two; The energy-absorbing conversion module is used for converting the initial speed into the initial speed Calculating the post-collision velocity Zero and angular velocity Maximum absorption energy below zero And distributing absorption energy to each energy absorption area according to the energy absorption proportion data And (C) sum The crushing force measuring and calculating module is used for measuring and calculating the crushing force according to the length of each energy absorption area Crush ratio Calculating to obtain average crushing force And draw up Curve, crushing ratio For determining theoretical values, i.e. crushing ratios, based on the corrected structural design of the vehicle , wherein, For the theoretical value of the length of the material after crushing, Is the length of material before crushing.
  14. 14. The vehicle forward structural design system of claim 13, wherein the evaluation module comprises: The deformation data feedback module feeds back an alarm signal that the front energy absorption area deforms before the front energy absorption area deforms completely and the rear energy absorption area deforms, and The crushing data feedback module feeds back average crushing force of the latter energy absorption area Average crushing force with the previous energy absorption area Ratio of (2) = Is provided.
  15. 15. The vehicle forward structural design system of claim 13, wherein the structural design module comprises: A structural reinforcement module, and a structural weakening module; When invading to displace Absorbing energy in the corresponding energy absorbing region Less than the distributed absorption energy When the structure reinforcing module is used, the corresponding structural member of the vehicle is subjected to reinforcing design; When invading to displace Absorbing energy in the corresponding energy absorbing region Greater than the distributed absorption energy In this case, the structural weakening module performs a weakening design of the corresponding structural part of the vehicle.
  16. 16. An electronic device, comprising: a memory and a processor, the memory having stored therein at least one program that is loaded and executed by the processor to implement the method of any one of claims 1 to 12.
  17. 17. A computer readable storage medium having stored therein at least one instruction that is loaded and executed by a processor to implement the method of any one of claims 1 to 12.

Description

Vehicle forward structure design method, system, electronic equipment and storage medium Technical Field The present invention relates to the field of vehicle structural design technologies, and in particular, to a method, a system, an electronic device, and a storage medium for designing a forward structure of a vehicle. Background Along with the development of society, the current new energy electric automobile in China develops very rapidly, meanwhile, the high-voltage safety requirement on the battery of the electric automobile is higher and higher, in side collision, particularly in the side 32km/h column collision experimental working condition of C-NCAP2021 version, besides the requirement of small deformation of the automobile, the condition that the battery cannot generate fire, explosion, release toxic and harmful gas, electric arc and the like during collision experiment is also required, wherein the collision resistance of the automobile body assembly, particularly the collision resistance in the collision direction, directly determines the collision degree of a power battery pack, namely the collision resistance of the automobile body assembly is closely related to the safety of the power battery system. In the prior art, when the structural design is carried out on the vehicle, the design is carried out under the conditions of no guidance and a large number of trial and error due to no theoretical value reference of the design, so that the structural design efficiency of the automobile is lower, the development cost of the structural design is high, and the development period is long. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a method, a system, an electronic device and a storage medium for designing a forward structure of a vehicle, which are used for solving the problems of inaccurate structural design, low structural design efficiency and high development cost of the vehicle in the prior art. To achieve the above and other related objects, the present invention provides a method for designing a forward structure of a vehicle, comprising the steps of: S1, constructing a side column collision of the vehicle A curve; s2, according to the method Curve guiding the design of the corresponding structural member of the vehicle to obtain the force transmission path and structure related data of the corresponding structural member; S3, finite element modeling is carried out by using the data related to the force transmission path and the structure of the corresponding structural member, simulation analysis of the side column collision safety is carried out, and the intrusion displacement along the force transmission path of the corresponding structural member, which is obtained by the simulation analysis, is estimated Whether or not to conform to a predetermined intrusion displacementAnd if the requirements are met, completing the structural design of the vehicle, and if the requirements are not met, returning to the step S1, and re-executing the step S1-S3. In an embodiment of the invention, the S1 includes: s11, determining the maximum absorption energy of the vehicle in the event of the side column collision ; S12, determining at least two energy absorption areas along a force transmission path from the door to the battery pack battery core and the distribution proportion of the absorption energy corresponding to each energy absorption area, thereby determining the absorption energy corresponding to each energy absorption area; S13, determining the crushing proportion corresponding to each energy absorption areaAnd using the crushing ratioTo calculate and obtain the intrusion displacement corresponding to the energy absorption area; S14, correspondingly bearing the absorption energy according to each energy absorption areaAnd corresponding said intrusion displacementCalculating to obtain the average crushing force correspondingly born by each energy absorption areaThereby obtaining the side column collisionA curve. In an embodiment of the present invention, in S11, the maximum absorption energyWherein the maximum absorption energyIs the post-collision velocityZero rotation speedZero and maintain initial velocityMaximum kinetic energy of the side column during collision under the condition,The experimental quality of the whole car is that of the whole car,Is the moment of inertia of the vehicle. In an embodiment of the present invention, in S12, each of the energy absorbing regions is configured to absorb energyAnd the maximum absorption energyThe following relationships are satisfied:。 In an embodiment of the present invention, in S12, the energy absorbing areas of the force transmission path from the door to the battery pack core include a first energy absorbing area corresponding to the force transmission path from the door to the outside of the door sill, a second energy absorbing area corresponding to the