CN115081101A

CN115081101A - Mechanical impact simulation method and device for vehicle-mounted display screen, terminal and storage medium

Info

Publication number: CN115081101A
Application number: CN202210400604.XA
Authority: CN
Inventors: 李�赫; 肖永富; 于保君; 张雨; 李鼎; 李景潭; 王月; 徐安杨; 杨涛
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2022-09-20

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a mechanical impact simulation method, a device, a terminal and a storage medium for a vehicle-mounted display screen. The method comprises the following steps: step one, selecting a simulation model range; step two, importing and processing entity geometric data; step three, carrying out grid division on each part and the special part of the part; step four, setting the connection type and parameters of each part; step five, simulation definition of the impact working condition; and step six, evaluating the simulation result. The impact strength of the vehicle-mounted display screen structure is verified by applying an analysis means, corresponding verification can be performed in a product development concept stage and before mold opening, meanwhile, connection parts related to interior decoration can be considered according to conditions, the actual use state is guaranteed as far as possible, and the defects of the existing impact test verification means are overcome.

Description

Mechanical impact simulation method and device for vehicle-mounted display screen, terminal and storage medium

Technical Field

The invention belongs to the technical field of automobiles, and particularly relates to a mechanical impact simulation method and device for a vehicle-mounted display screen, a terminal and a storage medium.

Background

In recent years, with the update of electronic products, vehicle-mounted display screens are more and more popular with users, and in different levels of passenger car cabins, the shapes, the number, the arrangement positions and the sizes of the display screens are more and more diversified, and the strength performance of the mounting structure of the display screens is also concerned by manufacturers correspondingly.

The impact of an automobile in the driving process is one of main loaded forms of corresponding parts installed on an interior trim, and due to the characteristics of large span and uncertain installation position of the current display screen, the impact resistance of the vehicle-mounted display screen is inspected. The traditional means is mainly tests, and the fixed position of the vehicle-mounted display screen is restricted to be positioned in a clamp with higher rigidity due to the limitation of development conditions, so that the method is far away from the actual use conditions.

Disclosure of Invention

The invention provides a vehicle-mounted display screen mechanical impact simulation method, a device, a terminal and a storage medium, which verify the impact strength of a vehicle-mounted display screen structure by applying an analysis means, can perform corresponding verification in a product development concept stage and before mold opening, can consider connecting parts related to interior decoration according to conditions, ensure the actual use state as far as possible, and overcome the defects of the existing impact test verification means.

The embodiments of the invention are described below with reference to the accompanying drawings:

in a first aspect, an embodiment of the present invention provides a mechanical impact simulation method for a vehicle-mounted display screen, including the following steps:

step one, selecting a simulation model range;

step two, importing and processing entity geometric data;

step three, carrying out grid division on each part and the special part of the part;

step four, setting the connection type and parameters of each part;

step five, simulation definition of impact working conditions;

and step six, evaluating the simulation result.

Further, the specific method of the first step is as follows:

the vehicle-mounted display screen comprises a vehicle-mounted instrument screen and a vehicle-mounted central control screen; intercepting vehicle body environment parts connected with a vehicle-mounted instrument screen and a vehicle-mounted central control screen; and judging the connection characteristics of the vehicle-mounted display screen and the impact influence of the corresponding parts of the connected vehicle body in X, Y, Z three directions, and selecting and intercepting the boundary of the local model, wherein the distance L between the intercepted boundary and the edge of the vehicle-mounted display screen is more than 100 mm.

Further, the specific method of the second step is as follows:

and (4) importing entity geometric data in the hypermesh software platform, and correcting the characteristics of different parts.

Further, the specific method of the third step is as follows:

and under the ABAQUS template environment in the hypermesh software platform, carrying out mesh generation of different types of characteristics on different parts.

Further, the specific method of the fourth step is as follows:

41) setting connection types of different parts under an ABAQUS platform modeling environment;

aiming at the connection between the parts of the display screen assembly: the glass cover plate, the glue and the front shell are connected in a key word TIE mode; the screw hole connection in other structures adopts rigid coupling connection;

for the connection between the display screen and the vehicle body environment part: the screw holes or screw connections adopt rigid coupling connection; the buckle connection is connected in a keyword CONNECTOR mode;

42) setting model parameters of different parts in an ABAQUS platform modeling environment;

for a physical grid cell: giving a mode by using a solid section attribute;

aiming at the shell grid unit, a shell section attribute endowing mode is adopted;

aiming at the glass material, the glass cover plate adopts a boutte brittle material constitutive model; the rest adopts plastic elastic-plastic material constitutive model;

for snap connections, the spring unit property is defined using the segment under segment type, and the force-displacement characteristic of the snap is entered using the segment under segment.

The specific parameters set above are used as input references according to the material grade and the test result of the product.

Further, the specific method of the fifth step is as follows:

51) the display screen assembly and the relevant connected environment piece are integrally a system model, and the interception boundary of the system model is used as a constraint boundary;

52) continuously impacting 9 times at 60g and 90ms periodic half sine wave acceleration in six directions of + X, -X, + Y, -Y, + Z and-Z respectively at a constraint boundary, wherein the total impact load process is 0.81 s;

53) defining EXPLICIT analysis EXPLICIT load analysis steps, and defining the load analysis steps by applying keywords DYNAMIC and EXPLICIT;

54) in the step of load analysis, BOUNDARY and TYPE are applied in the direction of mechanical impact

The ACCELERATION key words refer to periodic continuous half sine waves and apply impact excitation in an ACCELERATION mode;

55) finishing the setting of the damping value and the output parameter in the load analysis step;

56) step 51) -step 55) are respectively set once for six directions of + X, -X, + Y, -Y, + Z and-Z.

Further, the specific method of the sixth step is as follows:

and evaluating the maximum Mises stress of the front shell, the rear shell, the plastic structure and the metal sheet metal bracket structure in six directions of + X, -X, + Y, -Y, + Z and-Z respectively, and when the maximum Mises stress is less than the material yield limit, determining that the structure is qualified.

In a second aspect, an embodiment of the present invention further provides a device for simulating mechanical impact of a vehicle-mounted display screen, including:

a selection module for selecting a simulation model range;

the import and processing module is used for importing and processing the entity geometric data;

the meshing module is used for meshing each part and the special part of the part;

the setting module is used for setting the connection type and the parameters of each part;

the definition module is used for defining the simulation of the impact working condition;

and the result evaluation module is used for evaluating the simulation result.

In a third aspect, a terminal is provided, which includes:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

the method of the first aspect of the embodiments of the present invention is performed.

In a fourth aspect, there is provided a non-transitory computer readable storage medium having instructions which, when executed by a processor of a terminal, enable the terminal to perform the method of the first aspect of an embodiment of the invention.

In a fifth aspect, an application program product is provided, which, when running on a terminal, causes the terminal to perform the method according to the first aspect of the embodiments of the present invention.

The invention has the beneficial effects that:

the impact strength of the vehicle-mounted display screen structure is verified by applying an analysis means, corresponding verification can be performed at the product development concept stage and before the mould opening, meanwhile, the connection parts related to the interior decoration can be considered according to the condition, the actual use state is ensured as far as possible, and the defects of the existing impact test verification means are overcome.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a flow chart of a mechanical impact simulation method for a vehicle-mounted display screen according to the present invention;

FIG. 2 is a schematic illustration of a selected simulation model range; (ii) a

FIG. 3 is a schematic diagram of a system model truncation boundary;

FIG. 4 is a schematic diagram of a continuous impact at a constraint boundary with a half sine wave acceleration at a period of 60g and 90 ms;

FIG. 5 is a schematic structural diagram of a vehicle-mounted display screen mechanical impact simulation device according to the present invention;

fig. 6 is a schematic block diagram of a terminal structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Example one

Fig. 1 is a flowchart of a method for simulating mechanical impact of a vehicle-mounted display screen according to an embodiment of the present invention, where the embodiment is applicable to a situation of mechanical impact simulation of a vehicle-mounted display screen, and the method may be executed by a device for simulating mechanical impact of a vehicle-mounted display screen according to an embodiment of the present invention, and the device may be implemented in a software and/or hardware manner.

Step one, selecting a simulation model range;

the vehicle-mounted display screen comprises a vehicle-mounted instrument screen and a vehicle-mounted central control screen.

And intercepting the parts of the vehicle body environment connected with the vehicle-mounted instrument screen and the vehicle-mounted central control screen to enable the simulation result to be closer to the use characteristics of the real vehicle, as shown in fig. 2, wherein the parts of the vehicle body refer to parts connected with the display screen, and the parts belong to the parts of the vehicle body.

Before analysis, the connection characteristics of the vehicle-mounted display screen and the impact influence of the corresponding parts of the connected vehicle body in three directions are judged, and the boundary of the local model is selected and intercepted. After the treatment, it is stored separately for the next step.

The distance L between the intercepted boundary and the edge of the vehicle-mounted display screen is recommended to be larger than 100 mm.

Step two, importing and processing entity geometric data;

Taking an instrument screen as an example:

removing fine surface features aiming at the PCB, and ensuring the smooth features to be favorable for subdividing grids;

aiming at the TFT module, the multilayer complex on the TFT module is geometrically simplified into integrally wrapped block-shaped characteristics, and subsequent modeling can be planned and integrated with a glass cover plate to perform mesh division (node pair nodes);

performing washer processing on a geometric characteristic surface aiming at connecting hole positions (screw holes) between the parts to prepare for subsequent regularized refined mesh division;

for the relevant environment parts connected with the display screen, the quality has no special requirements and the principle that the number of units is as small as possible is followed.

Taking an instrument screen as an example:

aiming at the integrated meshing of the glass cover plate and the TFT module by node pairs and nodes, the meshes are divided into hexahedrons, wherein two rows of units are arranged in the thickness direction of the part of the glass cover plate, the size of each mesh is 1.5mm, and the type of each mesh is C3D 8;

the method comprises the following steps that hexahedron division grids are adopted for PCB grids, two rows of units are arranged in the thickness direction, the size of the grids is 1.5mm, the types of the grids are C3D8, and if the grids have the characteristic of connecting holes, the minimum size of the connecting hole washer grids is recommended to be 0.5 mm;

the method comprises the following steps of dividing a grid by using a tetrahedron aiming at a front shell grid and a back shell grid, converting the divided grids into tetrahedron units, wherein the size of the grid is 1.5mm, the type of the grid is C3D10M, and if the grid has the characteristic of a connecting hole, the minimum size of the connecting hole washer grid is recommended to be 0.5 mm;

for other plastic structures, a tetrahedron is adopted to divide meshes, the meshes are converted into tetrahedron units after division, the size of each mesh is 1.5mm, the type of each mesh is C3D10M, and if the mesh has a connecting hole characteristic, the minimum size of a connecting hole washer mesh is recommended to be 0.5 mm;

the metal plate support is divided into grids in a triangular or quadrilateral mode, the size of each grid is 1.5mm, the type of each grid is s3 or s4, and if the metal plate support has the characteristic of connecting holes, the minimum size of each connecting hole washer grid is recommended to be 0.5 mm.

Step four, setting the connection type and parameters of each part;

for a physical grid cell: giving a mode by using a solid section attribute;

Step five, simulation definition of the impact working condition;

51) the display screen assembly and the relevant connected environment piece are integrally a system model, and the interception boundary of the system model is used as a constraint boundary, as shown in FIG. 3;

52) continuously impacting for 9 times at six directions of + X, -X, + Y, -Y, + Z and-Z with half sine wave acceleration of 60g and 90ms cycle respectively at a constraint boundary, wherein the total impact load process is 0.81s, as shown in figure 4;

54) in the load analysis step, applying a BOUNDARY keyword, a TYPE keyword, an ACCELERATION keyword, a periodic continuous half sine wave and an impact excitation in an ACCELERATION mode in the direction of mechanical impact;

And step six, evaluating the simulation result.

Example two

Referring to fig. 5, a mechanical impact simulation apparatus for a vehicle-mounted display screen includes:

a selection module for selecting a simulation model range;

and the result evaluation module is used for evaluating the simulation result.

EXAMPLE III

Fig. 6 is a block diagram of a terminal according to an embodiment of the present application, where the terminal may be the terminal in the foregoing embodiment. The terminal 300 may be a portable mobile terminal such as: smart phones, tablet computers. The terminal 300 may also be referred to by other names such as user equipment, portable terminal, etc.

Generally, the terminal 300 includes: a processor 301 and a memory 302.

The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 301 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 301 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 302 is used to store at least one instruction for execution by processor 301 to implement a method of optimization of a solder joint arrangement provided herein.

In some embodiments, the terminal 300 may further include: a peripheral interface 303 and at least one peripheral. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, touch display screen 305, camera 306, audio circuitry 307, positioning components 308, and power supply 309.

The peripheral interface 303 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and peripheral interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302 and the peripheral interface 303 may be implemented on a separate chip or circuit board, which is not limited by the embodiment.

The Radio Frequency circuit 304 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 304 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 304 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 304 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The touch display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. Touch display screen 305 also has the ability to capture touch signals on or over the surface of touch display screen 305. The touch signal may be input to the processor 301 as a control signal for processing. The touch screen display 305 is used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the touch display screen 305 may be one, providing the front panel of the terminal 300; in other embodiments, the touch display screen 305 may be at least two, respectively disposed on different surfaces of the terminal 300 or in a folded design; in still other embodiments, the touch display 305 may be a flexible display disposed on a curved surface or on a folded surface of the terminal 300. Even more, the touch screen display 305 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The touch Display screen 305 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and the like.

The camera assembly 306 is used to capture images or video. Optionally, the camera assembly 306 includes a front camera and a rear camera. Generally, a front camera is used for realizing video call or self-shooting, and a rear camera is used for realizing shooting of pictures or videos. In some embodiments, the number of the rear cameras is at least two, and each of the rear cameras is any one of a main camera, a depth-of-field camera and a wide-angle camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting function and a VR (Virtual Reality) shooting function. In some embodiments, camera assembly 306 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

Audio circuit 307 is used to provide an audio interface between the user and terminal 300. The audio circuitry 307 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 301 for processing or inputting the electric signals to the radio frequency circuit 304 to realize voice communication. The microphones may be provided in plural numbers, respectively, at different portions of the terminal 300 for the purpose of stereo sound collection or noise reduction. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuitry 304 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 307 may also include a headphone jack.

The positioning component 308 is used to locate the current geographic Location of the terminal 300 for navigation or LBS (Location Based Service). The Positioning component 308 may be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

The power supply 309 is used to supply power to the various components in the terminal 300. The power source 309 may be alternating current, direct current, disposable or rechargeable. When the power source 309 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

Those skilled in the art will appreciate that the configuration shown in fig. 6 is not intended to be limiting of terminal 300 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

Example four

In an exemplary embodiment, a computer readable storage medium is further provided, on which a computer program is stored, which when executed by a processor, implements a vehicle-mounted display mechanical shock simulation method as provided in all inventive embodiments of this application.

Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: 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 the context of this document, a computer readable storage medium may 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.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

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

Computer program code for carrying out operations for aspects of the present invention may 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 may 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 case of a remote computer, the remote computer may 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 may be made to an external computer (for example, through the Internet using an Internet service provider).

EXAMPLE five

In an exemplary embodiment, an application program product is also provided, which includes one or more instructions executable by the processor 301 of the above apparatus to perform the above method for simulating mechanical shock of a vehicle display screen.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications set forth in the specification and the examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims

1. A mechanical impact simulation method for a vehicle-mounted display screen is characterized by comprising the following steps:

step one, selecting a simulation model range;

step two, importing and processing entity geometric data;

step four, setting the connection type and parameters of each part;

step five, simulation definition of the impact working condition;

and step six, evaluating the simulation result.

2. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the specific method in the first step is as follows:

3. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the specific method in the second step is as follows:

4. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the concrete method in the third step is as follows:

5. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the concrete method of the fourth step is as follows:

41) setting connection types of different parts under the ABAQUS platform modeling environment;

for a physical grid cell: giving a mode by adopting a solid section attribute;

6. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the concrete method in the fifth step is as follows:

55) setting the damping value and the output parameter in the load analysis step;

7. The mechanical impact simulation method for the vehicle-mounted display screen according to claim 1, wherein the concrete method of the sixth step is as follows:

and evaluating the maximum Mises stress of the front shell, the rear shell, the plastic structure and the metal sheet support structure in six directions of + X, -X, + Y, -Y, + Z and-Z respectively, and when the maximum Mises stress is less than the material yield limit, determining that the structure is qualified.

8. The utility model provides a vehicle-mounted display screen mechanical shock simulation device which characterized in that includes:

a selection module for selecting a simulation model range;

and the result evaluation module is used for evaluating the simulation result.

9. A terminal, comprising:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

executing a mechanical impact simulation method of a vehicle-mounted display screen according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform a method of simulating mechanical impact on a vehicle display screen according to any one of claims 1 to 7.