An instrument panel simplified modeling method, device, equipment and storage medium

Abstract

The application is a kind of instrument panel simplified modeling method, device, equipment and storage medium. Including: the instrument panel is divided into the upper half area of the instrument panel and the lower half area of the instrument panel;The lower half area of the instrument panel is divided into different areas;The upper half area of the instrument panel and the lower half area of the instrument panel are simplified;The simplified instrument panel is modeled, the stiffness characteristic of the upper half area of the instrument panel is set separately, and the stiffness characteristic of each area of the lower half area of the instrument panel is set separately;The model of the instrument panel is optimized. The application is twisted by applying a torsional spring on the surface of the instrument panel, the stiffness attribute of the torsional spring is set, and then the contact response process of the human leg and the instrument panel is correctly simulated, the injury index of the human leg is obtained, the preliminary simulation analysis can be completed by using the surface data of the instrument panel in the modeling stage, and the development cycle is greatly shortened while ensuring the calculation accuracy.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobiles, in particular to a dashboard simplified modeling method, device, equipment and storage medium. BACKGROUND

[0002] In recent years, with the continuous increase of the number of automobiles, people's demand for automobile safety performance also increases. Automobile safety mainly includes active safety and passive safety. Simulation analysis and optimization of automobile occupant restraint system is an effective guarantee for improving passive safety performance. Through simulation of the restraint system, the real crash condition of the automobile is simulated, the damage of each part of the dummy is obtained, and the optimization direction is provided for the engineers.

[0003] The dashboard, as an important part of the restraint system, can provide support for the legs of the passengers when the crash occurs, prevent the passengers from continuing to move forward due to inertia, avoid secondary collision, reduce the injury of the passengers, and have good energy absorption characteristics and protection effect. At the same time, the dashboard also provides mounting points for the steering column, airbag, air conditioning duct and other key core components, meeting the functional and entertainment needs of the automobile. As can be seen, the dashboard is an indispensable important part of the automobile, and its absolute advantages are self-evident, but it also has certain disadvantages, such as complex structure, numerous types of parts, etc., which directly brings great trouble to the subsequent simulation analysis work.

[0004] So far, the main dashboard simulation modeling methods include Madymo software multi-rigid body modeling method and LS-DYNA software flexible body modeling method. The Madymo software is used to establish a multi-rigid body model for simulation of the restraint system, which has simple structure, convenient modeling and fast calculation speed, but the calculation precision is insufficient. Since the dashboard is rigidly processed as a whole, the contact response process between the dummy legs and the dashboard cannot be correctly simulated, losing the significance and value of simulation, and it is impossible to provide guiding suggestions for subsequent optimization. Therefore, this method is rarely used in engineering. When the LS-DYNA software is used to establish the simulation model of the dashboard, the calculation precision is high, and the real crash condition can be accurately reflected to a certain extent. However, due to the complex structure of the dashboard, the number of meshes is large, which will increase the modeling difficulty, prolong the calculation time, waste the calculation resources, etc. Moreover, due to the complex structure of the dashboard, it is difficult to completely define the structure parameters of each subtle component of the dashboard at the initial stage of the project, which will seriously affect the development progress of the occupant protection system performance. SUMMARY

[0005] The application provides a dashboard simplified modeling method, device, equipment and storage medium, which applies a torsional spring on the surface of the dashboard, sets the stiffness attribute of the torsional spring, correctly simulates the contact response process of the leg of a human body and the dashboard, and obtains the injury index of the leg of the human body. The dashboard surface data in the modeling stage is used to complete preliminary simulation analysis, the calculation precision is ensured, the development cycle is greatly shortened, and the above problems in the prior dashboard simplified modeling method are solved.

[0006] The technical scheme of the application is described below in combination with the drawings:

[0007] In a first aspect, the application provides a dashboard simplified modeling method, which comprises:

[0008] The dashboard is divided into an upper half area 1 of the dashboard and a lower half area of the dashboard, the upper half area 1 of the dashboard is a part that cannot be contacted by the leg of an occupant, and the lower half area of the dashboard is a part that can be contacted by the leg of the occupant;

[0009] The lower half area of the dashboard is divided into different areas;

[0010] The upper half area 1 of the dashboard and the lower half area of the dashboard are simplified;

[0011] The simplified dashboard is modeled, the stiffness characteristics of the upper half area 1 of the dashboard are set separately, and the stiffness characteristics of each area of the lower half area of the dashboard are set separately;

[0012] The model of the dashboard is optimized.

[0013] Further, the lower half area of the dashboard is divided into different areas, and specifically divided into a lower left area 2 of the dashboard and a lower right area 3 of the dashboard; the lower left area 2 of the dashboard is a contact area of the left leg of the occupant; and the lower right area 3 of the dashboard is a contact area of the right leg of the occupant.

[0014] Further, the specific method for simplifying the upper half area 1 of the dashboard is as follows: the upper half area 1 of the dashboard is simplified into a rigid surface of the outer surface of the dashboard, which is connected with the body in white and moves together.

[0015] Further, the specific method for simplifying the lower half area of the dashboard is as follows: the lower half part of the dashboard is simplified into a torsional spring.

[0016] Further, the stiffness characteristics of the upper half area 1 of the dashboard are simulated by the stiffness of the rigid surface of the outer surface of the dashboard.

[0017] Further, the stiffness characteristics of the lower half area of the dashboard are simulated by the material curve of the torsional spring 4.

[0018] Further, the torsion spring 4 is internally provided with a fixed rod 5; the torsion spring 4 is externally provided with a sleeve 6; one end of the torsion spring 4 is connected with the bottom of the instrument panel, and the connecting point has two.

[0019] In a second aspect, the embodiment of the present application further provides an instrument panel simplified modeling device, comprising:

[0020] A first dividing module is used for dividing the instrument panel into an upper half region 1 of the instrument panel and a lower half region of the instrument panel.

[0021] A second dividing module is used for dividing the lower half region of the instrument panel into different regions.

[0022] A simplifying module is used for simplifying the upper half region 1 of the instrument panel and the lower half region of the instrument panel.

[0023] A modeling module is used for modeling the simplified instrument panel.

[0024] An optimizing module is used for optimizing the model of the instrument panel.

[0025] In a third aspect, the embodiment of the present application further provides a computer device, comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor executes the program to realize the instrument panel simplified modeling method in any of the embodiments of the present application.

[0026] In a fourth aspect, the embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the program is executed by the processor to realize the instrument panel simplified modeling method in any of the embodiments of the present application.

[0027] The present application has the following beneficial effects:

[0028] 1) The present application applies the torsion spring on the surface of the instrument panel, sets the stiffness attribute of the torsion spring, correctly simulates the contact response process between the leg of the human body and the instrument panel, and obtains the injury index of the leg of the human body; the preliminary simulation analysis can be completed by using the surface data of the instrument panel in the modeling stage, the calculation precision is ensured, and the development cycle is greatly shortened.

[0029] 2) In the present application, the torsion spring has two contact points with the instrument panel, and is distributed at the two ends of the leg contact area of the instrument panel, that is, no matter how the knee of the occupant slides, the motion stability of the instrument panel can be ensured.

[0030] 3) The present application adopts the method that the torsion spring is arranged at the bottom of the instrument panel, does not require the position of the leg contact point of the occupant and the motion direction of the leg of the occupant, and as long as the contact with the instrument panel, the knee sliding amount and the thigh compression force of the occupant can be calculated, and the calculation precision is improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 Schematic diagram of instrument panel partitioning;

[0033] Figure 2 Schematic diagram of torsion spring structure;

[0034] Figure 3 Schematic diagram of simplified instrument panel modeling;

[0035] Figure 4 Comparison curve diagram of occupant thigh compression force;

[0036] Figure 5 Comparison curve diagram of occupant knee slip amount;

[0037] Figure 6 Flowchart of a simplified instrument panel modeling method;

[0038] Figure 7 Schematic diagram of structure of a simplified instrument panel modeling device;

[0039] Figure 8 Schematic diagram of structure of an electronic device.

[0040] In the drawings:

[0041] 1, upper half region of instrument panel; 2, left lower region of instrument panel; 3, right lower region of instrument panel; 4, torsion spring; 5, fixed rod; 6, sleeve; 7, connection end. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0043] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0044] Embodiment one

[0045] Figure 6 A flow chart of a dashboard simplified modeling method is provided for embodiment one of the present application. The embodiment can be applicable to a dashboard simplified modeling case. The method can be executed by a dashboard simplified modeling device in the embodiments of the present application. The device can be realized in the form of software and / or hardware, as shown in Figure 6 .

[0046] Referring to Figure 1 , a dashboard simplified modeling method includes the following steps:

[0047] Step one, divide the dashboard into an upper half area 1 of the dashboard and a lower half area of the dashboard.

[0048] The upper half area 1 of the dashboard is a part that cannot be contacted by the legs of the occupant.

[0049] The lower half area of the dashboard is a part that can be contacted by the legs of the occupant.

[0050] Step two, divide the lower half area of the dashboard into a left lower area 2 of the dashboard and a right lower area 3 of the dashboard; the left lower area 2 of the dashboard is the left leg contact area of the occupant; the right lower area 3 of the dashboard is the right leg contact area of the occupant.

[0051] Step three, simplify the upper half area 1 of the dashboard and the lower half area of the dashboard; specifically:

[0052] Simplify the upper half area 1 of the dashboard into a rigid surface of the outer surface of the dashboard, which is connected together with the body-in-white and moves together.

[0053] Simplify the lower half part of the dashboard into a torsional spring 4. The torsional spring 4 is internally provided with a fixed rod 5; the fixed rod 5 is used to limit the torsional spring 4 to rotate only in the XZ plane, thereby increasing the stability of the torsional spring 4; the torsional spring 4 is externally provided with a sleeve 6, which is used to fix the torsional spring 4, while ensuring that the torsional spring 4 can be stably connected with the body-in-white.

[0054] During the process of vehicle collision, the occupant's leg not only moves along the longitudinal direction of the vehicle body, but also slides outward or inward after the occupant's knee contacts the instrument panel, the contact point of the knee deviates from the fixed point of the axial spring and the instrument panel, and if the telescopic spring is used to simulate the stiffness, the irregular distortion of the leg contact area of the instrument panel will be caused, and the motion stability is affected. Therefore, the torsional spring 4 is adopted to bear the torsion in the application, the torsional spring 4 is deformed by the torsion, and the above problems can be avoided. Moreover, the connecting end 7 of the torsional spring 4 is connected with the bottom of the instrument panel, and the connecting points are two, which are distributed at the two ends of the leg contact area of the instrument panel, that is, no matter how the occupant's knee slides, the motion stability of the instrument panel can be ensured, and the other end is connected with the sleeve 6.

[0055] In addition, the method that the torsional spring 4 is arranged at the bottom of the instrument panel is adopted in the application, the position of the occupant's leg contact point and the motion direction of the occupant's leg are not required, and the knee sliding amount and the thigh compression force can be calculated as long as the instrument panel is contacted, and the calculation accuracy is improved to a certain extent.

[0056] Step four, the simplified instrument panel is modeled, the stiffness characteristics of the upper half area 1 of the instrument panel are set separately, and the stiffness characteristics of the upper half area 1 of the instrument panel are simulated by the stiffness of the rigid surface of the outer surface of the instrument panel. The stiffness characteristics of each area of the lower half area of the instrument panel are set separately, and the stiffness characteristics of the lower half area of the instrument panel are simulated by the material curve of the torsional spring 4.

[0057] Step five, the model of the instrument panel is optimized.

[0058] The complete instrument panel model is replaced by the simplified instrument panel model, and the system level simulation calculation is performed again, and the original calculation result is compared. As shown in Figure 4 and Figure 5 , that is, the comparison results of the dummy thigh compression force and the knee sliding amount injury index, and it can be known from the figure that the change trends of the thigh compression force curves and the knee sliding amount curves obtained by two times of calculation are basically the same, the peak error is less than 10%, and good consistency is obtained.

[0059] Therefore, it is proved that the instrument panel model simplification method provided in the application is reasonable, the same calculation result can be obtained by using the simplified instrument panel model to replace the complete instrument panel model, the development and optimization of the subsequent occupant restraint system performance have guiding significance, the calculation cost can be greatly saved while the calculation accuracy is ensured, the development cycle is shortened, and the application has popularization value.

[0060] Embodiment two

[0061] Referring to Figure 7 , an instrument panel simplified modeling device comprises:

[0062] The first partitioning module is used to divide the dashboard into the upper half of the dashboard 1 and the lower half of the dashboard.

[0063] The second partitioning module is used to divide the lower half of the dashboard into different areas;

[0064] The simplification module is used to simplify the upper half of the dashboard (1) and the lower half of the dashboard.

[0065] The modeling module is used to model simplified dashboards;

[0066] The optimization module is used to optimize the dashboard model.

[0067] Example 3

[0068] Figure 8 This is a schematic diagram of the structure of a computer device according to Embodiment 3 of the present invention. Figure 8 A block diagram of an exemplary computer device 102 suitable for implementing embodiments of the present invention is shown. Figure 8 The computer device 102 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.

[0069] like Figure 8 As shown, the computer device 102 is presented in the form of a general-purpose computing device. The components of the computer device 102 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).

[0070] 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.

[0071] Computer device 102 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 102, including volatile and non-volatile media, removable and non-removable media.

[0072] System memory 28 can 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 102 can further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 can be provided for reading from and writing to a non-removable, non-volatile magnetic media (not shown and typically called a "hard drive"). Figure 8 Although not shown, a magnetic disk drive can also be utilized in some embodiments for reading from and writing to a removable, non-volatile magnetic media such as a "floppy disk," and an optical disk drive can be used for reading from and / or writing to a removable, non-volatile optical media such as an optical disk such as CD-ROM, DVD-ROM or other optical media. In such instances, each drive can be connected to bus 18 by one or more data media interfaces. Storage 28 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the application. Figure 8

[0073] Program / utility 40, having a set (at least one) of program modules 42, can be stored in, for example, storage 28 by way of example, and not limitation, as well as an operating system, one or more application programs, other program modules, and program data, each or some combination thereof, can include implementation of a networking environment. Program modules 42 generally carry out the functions and / or methodologies of embodiments of the application as described herein.

[0074] Computer device 102 can also communicate with one or more external devices 14 such as a keyboard, a pointing device, a display 24, etc.; one or more devices that enable a user to interact with computer device 102; and / or one or more devices that enable computer device 102 to communicate with one or more other computing devices. Such communication can be via input / output (I / O) interfaces 22. Additionally, in embodiments where computer device 102 is embedded in a mirror, display 24 is not present as a separate entity, but rather the display surface of display 24 is integrated with the mirror surface such that the display surface of display 24 is visually merged with the mirror surface when the display surface of display 24 is not displaying. Still yet, computer device 102 can communicate with one or more networks, such as a local area network (LAN), a wide area network (WAN), and / or the Internet, through network adapter 20. As depicted, network adapter 20 communicates with the other components of computer device 102 via bus 18. It should be appreciated that although not shown, other hardware and / or software modules could be utilized in conjunction with computer device 102. Such as, but not limited to, microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data archival storage systems, etc.​

[0075] The processing unit 16 performs various function applications and data processing by running programs stored in the system memory 28, such as implementing a dashboard simplified modeling method provided by embodiments of the present application.

[0076] Example Four

[0077] Embodiment four of the present application provides a computer readable storage medium, having stored thereon a computer program, which when executed by a processor implements a dashboard simplified modeling method as provided by all embodiments of the present application.

[0078] Any combination of one or more computer readable medium can be employed. The 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 electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, the computer readable storage medium can be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

[0079] A computer readable signal medium can include a propagated data signal with computer readable program code embodied therein, for use by or in connection with an instruction execution system, apparatus, or device. The computer readable program code can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the foregoing. A computer readable signal medium can be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport program for use by or in connection with an instruction execution system, apparatus, or device.

[0080] Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0081] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0082] It is to be understood that the above description is directed to the preferred embodiments and that those skilled in the art will be able to devise various modifications which, although not specifically described herein, embody the principles of the application and are included within the spirit and scope of the application. Accordingly, while the preferred embodiments have been described above, those skilled in the art will understand that they are not to be limited to the preferred embodiments, but are to include all such embodiments falling within the scope of the application as defined by the appended claims.

Claims

1. A simplified modeling method for dashboards, characterized in that, include: The dashboard is divided into an upper half (1) and a lower half, wherein the upper half (1) is the part that the occupant's legs cannot reach, and the lower half is the part that the occupant's legs can reach. The lower half of the dashboard is divided into different areas; The upper half (1) and lower half of the dashboard are simplified; A simplified dashboard is modeled, and the stiffness characteristics of the upper half region (1) of the dashboard are set separately, and the stiffness characteristics of each region of the lower half region of the dashboard are set separately. Optimize the dashboard model; The lower half of the instrument panel is divided into different areas, specifically: the lower left area (2) and the lower right area (3); the lower left area (2) is the contact area for the occupant's left leg; the lower right area (3) is the contact area for the occupant's right leg. The specific method for simplifying the lower half of the dashboard is as follows: simplify the torsion spring in the lower half of the dashboard; The stiffness characteristics of the upper half region (1) of the instrument panel are simulated by the stiffness of the stiffened surface of the outer surface of the instrument panel. The stiffness characteristics of the lower half of the instrument panel are simulated using the material curve of the torsion spring (4); The torsion spring (4) has a fixing rod (5) inside; a sleeve (6) is provided on the outside of the torsion spring (4); one end of the torsion spring (4) is connected to the bottom of the instrument panel, and there are two connection points.

2. A simplified dashboard modeling apparatus for implementing the simplified dashboard modeling method of claim 1, characterized in that, include: The first division module is used to divide the dashboard into the upper half of the dashboard (1) and the lower half of the dashboard; The second partitioning module is used to divide the lower half of the dashboard into different areas; A simplification module is used to simplify the upper half (1) and lower half of the dashboard. The modeling module is used to model simplified dashboards; The optimization module is used to optimize the dashboard model.

3. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements a simplified dashboard modeling method as described in claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements a simplified dashboard modeling method as described in claim 1.

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