Crushing type automobile auxiliary instrument panel structure design method, system, equipment and storage medium

Abstract

This invention discloses a design method, system, device, and storage medium for a crushable automotive sub-instrument panel structure, belonging to the field of automotive technology. The design includes: determining the installation position and dimensions of a two-stage crushable spring; defining the material properties of the two-stage crushable spring; simulation and real-vehicle verification. The structure obtained by this design method includes the sub-instrument panel body, left and right side panels, and crushable springs. Crushing springs are applied inside the left and right side panels of the sub-instrument panel. By setting the material properties of the crushable springs, specifically: when the crushing force reaches 0.8KN, the first spring crushes; when the crushing force reaches 1.5KN, the second spring crushes, thereby achieving the crushing of the sub-instrument panel side panels and playing a buffering and energy-absorbing role. The two-stage, two-stage crushable sub-instrument panel structure proposed in this invention can solve the defects of traditional sub-instrument panel materials, such as high hardness, non-deformability, poor energy absorption, and insufficient buffering capacity, significantly improving the protection effect on the hips and chest / abdomen of occupants in side collisions and effectively reducing occupant injuries.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically relating to a two-stage, two-level crushable automotive sub-instrument panel structure design method, system, device, and storage medium. Background Technology

[0002] Statistics show that side-impact collisions account for about 30% of all collision accidents, second only to frontal collisions. Furthermore, injuries caused by far-end side-impact collisions account for about 30% of all side-impact injuries. Therefore, reducing injuries caused by far-end side-impact collisions is particularly important.

[0003] As a key component of a car, the sub-dashboard is an important part of the restraint system. In the event of a side collision, it provides strong support for the occupants' legs, hips, chest, and abdomen, preventing them from moving inwards and avoiding secondary collisions, thus reducing injuries and providing excellent protection. At the same time, the sub-dashboard also has some storage functionality, meeting basic travel needs. Therefore, the sub-dashboard is an indispensable and crucial part of a car, and its role is self-evident.

[0004] While the secondary instrument panel is irreplaceable in its function, it also has certain drawbacks. For example, most current automotive secondary instrument panels are fixed to the vehicle body, made of relatively hard materials, and are not adjustable. In the event of a collision, occupants make strong contact with the secondary instrument panel, which hardly deforms, exhibiting poor energy absorption. This results in insufficient cushioning for the occupants' hips, chest, and abdomen, leading to excessive pressure in these areas and causing serious injury. Summary of the Invention

[0005] To address the shortcomings of existing sub-instrument panels, this invention provides a two-stage, two-level crushable sub-instrument panel structure design method, system, device, and storage medium. The structure obtained by this design method includes a sub-instrument panel body, left and right side panels, and crushing springs. Crushing springs are applied inside the left and right side panels of the sub-instrument panel. By setting the material properties of the crushing springs, specifically: when the crushing force reaches 0.8 kN, the first spring crushes; when the crushing force reaches 1.5 kN, the second spring crushes, thereby achieving the crushing of the sub-instrument panel side panels and playing a buffering and energy-absorbing role. The two-stage, two-level crushable sub-instrument panel structure proposed in this invention can solve the defects of traditional sub-instrument panel materials, such as high hardness, non-deformability, poor energy absorption, and insufficient buffering capacity, significantly improving the protection effect on the hips and chest / abdomen of occupants in side collisions and effectively reducing occupant injuries.

[0006] This invention is achieved through the following technical solution:

[0007] A design method for a crushable automotive sub-instrument panel structure is applied to a two-stage, two-level crushable automotive sub-instrument panel structure, including a sub-instrument panel body. The sub-instrument panel body consists of a first crushable structure located at the upper part and a second crushable structure located at the lower part. Mounting points are provided on both the first and second crushable structures, and the mounting points are used for rigid connection with a two-level crushable spring. The design method includes:

[0008] S1. Determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel;

[0009] S2. Based on the installation position and dimensions of the secondary crushing spring, use a pressure device to calibrate the material properties of the crushing spring, and then define the material properties of the secondary crushing spring.

[0010] S3. Based on the installation position and dimensions of the secondary crushing spring, establish a three-dimensional data model of the secondary crushing spring; simulate the three-dimensional data model of the secondary crushing spring to obtain a three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; perform animation simulation on the three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated, and determine whether the crushable vehicle sub-instrument panel structure effectively reduces the pelvic and abdominal injuries of the dummy based on the deformation results of the animation simulation of the sub-instrument panel structure. If so, obtain the final three-dimensional data of the crushable vehicle sub-instrument panel structure and conduct subsequent real vehicle tests.

[0011] Furthermore, one end of the secondary crushing spring is rigidly connected to the left and right sides of the sub-instrument panel, and the other end is rigidly connected to the first crushing structure and the second crushing structure, respectively.

[0012] Furthermore, the secondary crushing spring is composed of two crushing springs with different elastic coefficients, namely a first-stage crushing spring and a second-stage crushing spring. The secondary crushing spring is respectively fitted with a first sleeve, a second sleeve and a third sleeve that are inserted into each other. The first-stage crushing spring is fitted inside the first sleeve and the second sleeve, and the second-stage crushing spring is fitted inside the third sleeve.

[0013] Furthermore, step S2 specifically includes the following:

[0014] After determining the installation position and size of the secondary crushing spring, a pressure gauge is used to calibrate the material properties of the crushing spring. When the crushing force is greater than 0.8KN, only the first crushing spring will crush. When the crushing force is greater than 1.5KN, the second spring will also crush simultaneously.

[0015] Further, in step S3, the simulation of the three-dimensional data model of the secondary crushing spring to obtain the three-dimensional data model of the crushable automotive sub-instrument panel structure to be simulated includes:

[0016] Finite element meshing was performed on the three-dimensional data model of the secondary crush spring. The secondary crush spring was rigidly connected to the sub-instrument body and the sub-instrument side panel (RIGID_BODY). The material properties of the secondary crush spring were set to obtain the process data of the three-dimensional data model of the secondary crush spring. Boundary conditions were applied to the process data of the three-dimensional data model of the secondary crush spring to obtain the three-dimensional data model of the crushable automotive sub-instrument structure to be simulated.

[0017] Secondly, the present invention also provides a design system for a crushable automotive sub-instrument panel structure, used to implement the above-mentioned design method, comprising:

[0018] The determination module is used to determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel.

[0019] The definition module is used to calibrate the material properties of the secondary crushing spring using a pressure device according to the installation position and size of the secondary crushing spring, and then define the material properties of the secondary crushing spring.

[0020] The simulation module is used to establish a three-dimensional data model of the secondary crush spring based on its installation position and dimensions; to simulate the three-dimensional data model of the secondary crush spring to obtain a three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; to perform animation simulation on the three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; and to determine whether the crushable vehicle sub-instrument panel structure effectively reduces the pelvic and abdominal injuries of the dummy based on the deformation results of the animation simulation. If so, the final three-dimensional data of the crushable vehicle sub-instrument panel structure is obtained, and subsequent real vehicle tests are conducted.

[0021] Thirdly, the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the design method of the crushable automotive sub-instrument panel structure as described in any of the embodiments of the present invention.

[0022] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the design method of the crushable automotive sub-instrument panel structure as described in any of the embodiments of the present invention.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] This invention proposes a two-stage, two-level crushable sub-instrument panel structure design method, system, equipment, and storage medium. By replacing the original sub-instrument panel structure with a two-stage, two-level crushable sub-instrument panel structure, the dummy's pelvic and abdominal injuries can be reduced. This invention has guiding significance for the development and optimization of subsequent occupant restraint system performance, greatly improves the protection effect of the occupant's pelvis and abdomen in side impact conditions, and effectively reduces occupant pelvic injuries. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a diagram showing the seating positions for passengers.

[0027] Figure 2 This is a schematic diagram of the sub-instrument panel body structure;

[0028] Figure 3 This is a schematic diagram of the crush spring installation. Points 1, 2, 3, and 4 represent the installation points that connect to the left side panel of the sub-instrument panel; points 5, 6, 7, and 8 represent the installation points that connect to the main body of the sub-instrument panel.

[0029] Figure 4 This is a cross-sectional view of the crush spring structure;

[0030] Figure 5 This is a schematic diagram of a two-stage, two-level crushable sub-instrument panel structure;

[0031] Figure 6 Set the material properties diagram for the first crush spring;

[0032] Figure 7 Set the material properties diagram for the second crush spring;

[0033] Figure 8 Comparison of pelvic and pubic bone strength in dummy pelvis;

[0034] Figure 9 A comparison chart of the compression volume of the dummy's abdomen;

[0035] Figure 10 This is a schematic diagram of the structure of an electronic device according to Embodiment 3 of the present invention. Detailed Implementation

[0036] To clearly and completely describe the technical solution and its specific working process of the present invention, the specific embodiments of the present invention are as follows, in conjunction with the accompanying drawings:

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Example 1

[0041] This embodiment provides a design method for a crushable automotive sub-instrument panel structure, applied to a two-stage, two-level crushable automotive sub-instrument panel structure. The two-stage, two-level crushable automotive sub-instrument panel structure of this embodiment is described in detail below. For most drivers and passengers, when sitting in the front seat, the height of the sub-instrument panel will exceed the abdominal ribs of a dummy. Figure 1 As shown; the two-stage, two-level crushable sub-instrument structure provided in this embodiment can achieve independent protection of the occupant's pelvis and abdominal ribs in side collision conditions, such as... Figure 2As shown, the instrument panel sidewall is divided into two parts from top to bottom at the corresponding positions of the occupant's pelvis and abdomen. The upper part, corresponding to the occupant's abdomen, is the first crushing structure; the lower part, corresponding to the occupant's pelvis, is the second crushing structure. Each crushing structure has four mounting points, for a total of 16 mounting points, for rigid connection with the crushing spring.

[0042] The two-stage, two-level crushable automotive sub-instrument panel structure of this embodiment, such as Figure 3 As shown, the sub-instrument body comprises a first crushing structure at the top and a second crushing structure at the bottom. Both the first and second crushing structures have mounting points for rigid connection with a secondary crushing spring. One end of the secondary crushing spring (mounting points 1, 2, 3, 4) is rigidly connected to the left side of the sub-instrument body, and the other end (mounting points 5, 6, 7, 8) is rigidly connected to the sub-instrument body. A rigid connection means that when one component is displaced or subjected to force, the other component will not experience relative displacement or deformation relative to the first component; they can be considered as a single unit. The rigid connection between the crushing spring and the sub-instrument body offers advantages such as high impact resistance and stability, effectively preventing connection failure during a collision.

[0043] like Figure 4 As shown, the secondary crushing spring consists of two crushing springs with different elastic coefficients, namely a first-stage crushing spring and a second-stage crushing spring. The secondary crushing spring is fitted with a first sleeve, a second sleeve, and a third sleeve that are mutually inserted and withdrawn. The first-stage crushing spring is fitted inside the first sleeve and the second sleeve, and the second-stage crushing spring is fitted inside the third sleeve.

[0044] Compared to a single-stage collapsible spring, a two-stage collapsible spring offers advantages such as longer collapsible travel, wider applicability, superior protective performance, and stronger accident-specificity. In a side-impact collision, if the impact is minor, only the first-stage collapsible spring collapses, providing cushioning and reducing injuries to the occupants' pelvis and abdomen. It also effectively prevents excessive movement of occupants towards the dashboard, thus avoiding secondary contact and collisions between front-seat passengers, significantly reducing injury. However, in more severe collisions, the entire second-stage spring collapses, maximizing cushioning and further minimizing pelvic and abdominal injuries. The collapsible spring is externally fitted with a sleeve to restrict its rotation and torsion, ensuring it can only move axially, increasing spring stability, and ensuring a stable connection between the spring and the dashboard body.

[0045] like Figure 5The diagram shows a two-stage, two-level crushable sub-instrument structure. One end of the crushing spring is rigidly connected to the left and right sides of the sub-instrument, and the other end is rigidly connected to the sub-instrument body, forming a two-stage, two-level crushable sub-instrument structure. By setting the material properties of the two crushing springs, the crushing of the sub-instrument during a collision can be achieved.

[0046] The material property design principle of the secondary crushing spring in this embodiment is as follows: According to the 2021 version of the China New Car Assessment Programme (C-NCAP) regulations, in the side impact test of a deformable moving barrier, if the pubic bone force of the front-row impact dummy exceeds 1.7KN, the dummy's pelvis will experience a deduction in points, meaning the occupant's pelvis will suffer a certain degree of damage. Therefore, to avoid injury to the occupant's pelvis, the material properties of the spring need to reserve a certain safety margin. Based on this, the pressure limit of the second crushing spring is determined to be 1.5KN, meaning that when the spring is subjected to an axial compressive force of 1.5KN, the second spring will crush. The material curve is set as follows: Figure 7 As shown; for the first crush spring, to avoid injury to the dummy's pelvis and other parts during minor impacts, resulting in penalties, its pressure limit is set to 0.8 kN, and its material curve is set as follows. Figure 6 As shown.

[0047] The design method includes:

[0048] S1. Determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel;

[0049] S2. Based on the installation position and dimensions of the secondary crushing spring, use a pressure device to calibrate the material properties of the crushing spring, and then define the material properties of the secondary crushing spring.

[0050] S3. Based on the installation position and dimensions of the secondary crushing spring, establish a three-dimensional data model of the secondary crushing spring; simulate the three-dimensional data model of the secondary crushing spring to obtain a three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; perform animation simulation on the three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated, and determine whether the crushable vehicle sub-instrument panel structure effectively reduces the pelvic and abdominal injuries of the dummy based on the deformation results of the animation simulation of the sub-instrument panel structure. If so, obtain the final three-dimensional data of the crushable vehicle sub-instrument panel structure and conduct subsequent real vehicle tests.

[0051] Finite element meshing was performed on the three-dimensional data model of the secondary crush spring. The secondary crush spring was rigidly connected to the sub-instrument body and the sub-instrument side panel (RIGID_BODY). The material properties of the secondary crush spring were set to obtain the process data of the three-dimensional data model of the secondary crush spring. Boundary conditions were applied to the process data of the three-dimensional data model of the secondary crush spring to obtain the three-dimensional data model of the crushable automotive sub-instrument structure to be simulated.

[0052] Specifically, to verify the correctness and rationality of this invention, a two-stage, two-level crushable sub-instrument panel model was used to replace the original sub-instrument panel model for system-level simulation analysis, and the results were compared with the original calculation results. The system-level simulation analysis model includes a rigid body-in-white, instrument panel, sub-instrument panel, driver's seat, carpet, seat belt, and driver's side WorldSID 50. th The dummy model has all its components stored in separate sub-files, which are called using the `*INCLUDE` keyword in the main file. The material and thickness of each component are assigned according to the vehicle's BOM. Finally, the Farside test acceleration waveform is applied to the rigid body white car using the LS-DYNA keyword `*BOUNDARY_PRESCRIBED_MOTION`, and a gravity field is set for the entire model. The time step `TIMESTEP` is set to -4e-7s, the time step scaling factor is set to 0.9, and the calculation termination time is set to 0.2s. Figure 8 and Figure 9 As shown in the figure, the results of the comparison of the injury indices of pelvic pubis force and abdominal compression volume in the dummy are as follows. It can be seen from the figure that the pelvic pubis force and abdominal compression volume calculated by the two-stage two-level crushable sub-instrument model are significantly smaller than the calculation results of the original sub-instrument model.

[0053] Example 2

[0054] This embodiment provides a design system for a crushable automotive sub-instrument panel structure to implement the above design method, including:

[0055] The determination module is used to determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel.

[0056] The definition module is used to calibrate the material properties of the secondary crushing spring using a pressure device according to the installation position and size of the secondary crushing spring, and then define the material properties of the secondary crushing spring.

[0057] The simulation module is used to establish a three-dimensional data model of the secondary crush spring based on its installation position and dimensions; to simulate the three-dimensional data model of the secondary crush spring to obtain a three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; to perform animation simulation on the three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; and to determine whether the crushable vehicle sub-instrument panel structure effectively reduces the pelvic and abdominal injuries of the dummy based on the deformation results of the animation simulation. If so, the final three-dimensional data of the crushable vehicle sub-instrument panel structure is obtained, and subsequent real vehicle tests are conducted.

[0058] Example 3

[0059] Figure 10 This is a schematic diagram of the structure of a computer device in Embodiment 3 of the present invention. Figure 10 A block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention is shown. Figure 10 The computer device 12 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0060] like Figure 10 As shown, the computer device 12 is represented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0061] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0062] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0063] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 3Not shown; usually referred to as a "hard drive"). Although Figure 3 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0064] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include—but are not limited to—an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.

[0065] The computer device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the computer device 12, and / or with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via the input / output (I / O) interface 22. Furthermore, in this embodiment, the display 24 of the computer device 12 is not an independent entity, but is embedded in a mirror, so that when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface visually blend together. Moreover, the computer device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via the network adapter 20. As shown, the network adapter 20 communicates with other modules of the computer device 12 via the bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0066] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the design method of the crushable automotive sub-instrument panel structure provided in the embodiments of the present invention.

[0067] Example 4

[0068] Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the design method of the crushable automotive sub-instrument panel structure as provided in all embodiments of the present application.

[0069] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0070] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0071] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0072] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0073] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A design method of a crushable automobile sub-instrument panel structure, characterized by, An application is made to a two-stage, two-level crushable automotive sub-instrument panel structure, comprising a sub-instrument panel body, the sub-instrument panel body being composed of an upper first crushable structure and a lower second crushable structure, both the first and second crushable structures being provided with mounting points for rigid connection with a two-stage crushable spring, the design method comprising: S1. Determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel; S2. Based on the installation position and dimensions of the secondary crushing spring, use a pressure device to calibrate the material properties of the crushing spring, and then define the material properties of the secondary crushing spring. S3. Based on the installation position and dimensions of the secondary crush spring, establish a three-dimensional data model of the secondary crush spring; simulate the three-dimensional data model of the secondary crush spring to obtain a three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated; perform animation simulation on the three-dimensional data model of the crushable vehicle sub-instrument panel structure to be simulated, and determine whether the crushable vehicle sub-instrument panel structure effectively reduces the pelvic and abdominal injuries of the dummy based on the deformation results of the animation simulation of the sub-instrument panel structure. If so, obtain the final three-dimensional data of the crushable vehicle sub-instrument panel structure, and conduct subsequent real vehicle tests. One end of the secondary crushing spring is rigidly connected to the left and right sides of the sub-instrument panel, and the other end is rigidly connected to the first crushing structure and the second crushing structure respectively. The secondary crushing spring consists of two crushing springs with different elastic coefficients, namely a first-stage crushing spring and a second-stage crushing spring. The secondary crushing spring is fitted with a first sleeve, a second sleeve, and a third sleeve that are inserted into each other. The first-stage crushing spring is fitted inside the first and second sleeves, and the second-stage crushing spring is fitted inside the third sleeve.

2. The design method of the crushable automotive sub-instrument panel structure as described in claim 1, characterized in that, Step S2 specifically includes the following: After determining the installation position and size of the secondary crushing spring, a pressure gauge is used to calibrate the material properties of the crushing spring. When the crushing force is greater than 0.8KN, only the first crushing spring will crush. When the crushing force is greater than 1.5KN, the second spring will also crush simultaneously.

3. The design method of the crushable automotive sub-instrument panel structure as described in claim 1, characterized in that, In step S3, the simulation of the three-dimensional data model of the secondary crushing spring yields a three-dimensional data model of the crushable automotive sub-instrument panel structure to be simulated, including: Finite element meshing was performed on the three-dimensional data model of the secondary crushing spring. The secondary crushing spring was rigidly connected to the sub-instrument body and the sub-instrument side panel. The material properties of the secondary crushing spring were set to obtain the process data of the three-dimensional data model of the secondary crushing spring. Boundary conditions were applied to the process data of the three-dimensional data model of the secondary crushing spring to obtain the three-dimensional data model of the crushable automotive sub-instrument structure to be simulated.

4. A design system for a crushable automotive sub-instrument panel structure, used to implement the design method for a crushable automotive sub-instrument panel structure as described in any one of claims 1-3, characterized in that, include: The determination module is used to determine the installation position and dimensions of the secondary crush spring based on the structural dimensions of the sub-instrument panel and the spatial layout of the central channel. The definition module is used to calibrate the material properties of the secondary crushing spring using a pressure device according to the installation position and size of the secondary crushing spring, and then define the material properties of the secondary crushing spring. The simulation module is used to establish a three-dimensional data model of the secondary crushing spring based on its installation position and dimensions; and to simulate the three-dimensional data model of the secondary crushing spring to obtain a three-dimensional data model of the crushable automotive sub-instrument panel structure to be simulated. Animation simulation is performed on the three-dimensional data model of the crushable vehicle sub-instrument structure to be simulated. Based on the deformation results of the animation simulation of the sub-instrument structure, it is determined whether the crushable vehicle sub-instrument structure effectively reduces the pelvic and abdominal injuries of the dummy. If so, the final three-dimensional data of the crushable vehicle sub-instrument structure is obtained, and subsequent real vehicle tests are conducted.

5. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the design method of the crushable automotive sub-dashboard structure as described in any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the design method of the crushable automotive sub-instrument panel structure as described in any one of claims 1-3.

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