Method and system for evaluating sudden closing passing amount of front hatch cover of automobile

Abstract

The invention discloses an automobile front hatch cover violent closing passing amount evaluation method and system. The method comprises the steps that a violent closing model containing all parts influencing the front hatch cover violent closing passing amount, the constraint relation of all the parts, automobile body cutting position information and working condition load information are obtained; according to the position information of the cut automobile body, cutting the violent closing model, and reserving the model on the side where the engine cover is located to obtain a cut model; constraint is applied to the cutting model according to the constraint relation of all the components, and a constrained model is obtained; applying a working condition load to the constrained model according to the working condition load information to obtain a front hatch cover violent closing analysis model; according to the front hatch cover fierce closing analysis model, the front hatch cover fierce closing passing amount is determined; and judging whether the automobile front hatch cover violently-closed passing amount meets the requirement or not. And rapid determination and optimization of the sudden-closing passing amount of the front cabin cover of the automobile are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile body optimization, and in particular to a method and system for evaluating the slam-shut clearance of an automobile hood. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The slam clearance of a car's hood is a key performance indicator during hood development, ensuring it meets design requirements for mating with adjacent components. Excessive hood clearance can result in excessive clearance around the hood, affecting its aesthetics. Too little hood clearance can interfere with surrounding parts, resulting in slash marks.

[0004] Currently, the main method is to determine the slam closure amount of the front hatch cover by building a front hatch cover slam closure analysis model and conducting simulation analysis on the front hatch cover slam closure analysis model.

[0005] However, the current hood slam analysis model construction requires selecting each component individually and then adding constraints to each component, resulting in low efficiency. Furthermore, the current model only simulates the hood slam clearance, but does not automatically determine whether the hood slam clearance meets the requirements, nor can it optimize the hood slam clearance. Summary of the Invention

[0006] In order to solve the above problems, the present invention proposes a method and system for evaluating the clearance of automobile hood slam closure, which improves the efficiency of constructing a hood slam closure analysis model and realizes the optimized analysis of the clearance of automobile hood slam closure.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] First, a method for evaluating the slam closure of a car's hood is proposed, including:

[0009] Obtaining a slam-shut model of each component that affects the slam-shut clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information;

[0010] According to the position information of the cut body, the Mengguan model is cut, and the model of the side where the hood is located is retained to obtain the cut model;

[0011] Apply constraints to the cut model according to the constraint relationship of each component to obtain a constrained model;

[0012] Apply working loads to the constrained model based on working load information to obtain the hood slam-shut analysis model;

[0013] According to the hood slam closure analysis model, determine the hood slam closure clearance;

[0014] Determine whether the slamming amount of the car's front hood meets the requirements.

[0015] Further, it is determined whether the slamming amount of the vehicle's front hood meets the requirements;

[0016] When the slam closure amount of the automobile hood does not meet the requirement, various parameters affecting the slam closure amount of the hood are optimized until the slam closure amount of the hood meets the requirement.

[0017] Furthermore, when the clearance amount of the front hatch cover slamming shut is within the required clearance amount range, it is determined that the clearance amount of the front hatch cover slamming shut meets the requirement;

[0018] When the clearance amount of the front hatch cover slamming shut is not within the required clearance amount range, it is determined that the clearance amount of the front hatch cover slamming shut of the vehicle does not meet the requirement.

[0019] Furthermore, the constraint relationship includes connection information, boundary constraint information, and contact relationship and contact type information between components.

[0020] Furthermore, when the initial model for the clearance analysis is cut, the cutting surface is parallel to the width direction of the vehicle body.

[0021] Furthermore, the working load information includes the rotation center and rotation angular velocity of the moving parts in the initial model of the clearance analysis.

[0022] Furthermore, the Mengguan model is a three-dimensional geometric model.

[0023] Furthermore, the Mengguan model includes a hood model, a buffer block model, a front bumper model, a sealing strip model, a lower body model, a headlight model and a fender model.

[0024] Secondly, a vehicle hood slamming pass assessment system is proposed, including:

[0025] A data acquisition unit is used to obtain a slam-close model of each component that affects the slam-close clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information;

[0026] A hood slam closure analysis model construction unit is used to truncate the slam closure model based on the position information of the truncation body, retain the model of the side where the hood is located, and obtain a truncation model; apply constraints to the truncation model based on the constraint relationship of each component to obtain a constrained model; apply working loads to the constrained model based on working load information to obtain a hood slam closure analysis model;

[0027] A front hood slam closure clearance amount determination unit, configured to determine the front hood slam closure clearance amount based on a front hood slam closure analysis model;

[0028] The clearance optimization unit is used to determine whether the clearance of the car's front hood slamming shut meets the requirements.

[0029] In a third aspect, a computer device is provided, comprising:

[0030] a processor adapted to execute a computer program;

[0031] A computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the method for evaluating the amount of slam-shut clearance of a vehicle hood proposed in the first aspect is implemented.

[0032] In a fourth aspect, a computer-readable storage medium is proposed, wherein the computer-readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor and executed by a method for evaluating the amount of slamming of a car hood proposed in the first aspect.

[0033] In a fifth aspect, a computer program product is proposed, which includes a computer program. When the computer program is executed by a processor, it implements the method for evaluating the amount of slamming of a car hood proposed in the first aspect.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention proposes a method and system for evaluating the slam closure clearance of a car hood. The method directly obtains a slam closure model, the constraint relationships of various components, the position information of the cut body, and the working load information; then, the slam closure model is cut according to the cut body position information, and the model of the side where the hood is located is retained to obtain a truncated model; constraints are applied to the truncated model according to the constraint relationships of various components to obtain a constrained model; working loads are applied to the constrained model according to the working load information to obtain a slam closure analysis model of the hood; there is no need to additionally select various components and add constraints to the components separately, thereby improving the construction efficiency of the slam closure analysis model; and after obtaining the slam closure clearance of the hood, the method of the present invention also judges whether the slam closure clearance of the hood meets the requirements, and further realizes the optimization analysis of the slam closure clearance of the hood.

[0036] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0038] Figure 1 A flow chart of a method for evaluating the slam-shut clearance of a vehicle hood disclosed in an embodiment;

[0039] Figure 2 This is a schematic diagram of the interface of the pre-processing tool for the hair cover and the slam closure disclosed in the embodiment;

[0040] Figure 3 This is a schematic diagram of a truncated model disclosed in the embodiment.

[0041] Among them: 1. Cover selection button; 2. Cover part ID number text box; 3. Buffer block selection button; 4. Buffer block part ID number text box; 5. Front fender (including grille) selection button; 6. Front fender (including grille) part ID number text box; 7. Sealing strip selection button; 8. Sealing strip part ID number text box; 9. Lower body selection button; 10. Lower body part ID number text box; 11. Headlight selection button; 12. Headlight part ID number text box; 13. Fender selection button; 14. Fender part ID number text box; 15. Moving part selection button; 16. Moving part ID number text box; 17. Cut body position information selection button; 18. Single point connection selection button; 19. Batch single point connection selection button; 20. Multi-point connection selection button; 21. Prompt button; 22. Generate contact button; 23. Select constraint point button; 24. Rotation center selection button; 25. Rotation center input box; 26. Angular velocity input box; 27. Establish working condition button. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] In the present invention, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations of the present invention.

[0046] Example 1

[0047] First, the application scenario of the method for evaluating the slam-shut clearance of a car hood provided in an embodiment of the present application is described.

[0048] An application scenario of a method for evaluating the amount of slam-shut clearance of a vehicle's hood provided by an embodiment of the present application is to optimize and analyze the amount of slam-shut clearance of a vehicle's hood.

[0049] Currently, the bonnet slam clearance amount can only be obtained through simulation analysis of the bonnet slam analysis model; and whether the bonnet slam clearance amount meets the requirements cannot be automatically determined; let alone optimized. Moreover, when building the current bonnet slam analysis model, it is necessary to click on the bonnet slam model to select the component, and then add various constraints to the component, resulting in low model building efficiency.

[0050] In order to improve the efficiency of constructing a hood slam analysis model and achieve optimized analysis of the hood slam clearance, an embodiment of the present application provides a method for evaluating the hood slam clearance of an automobile.

[0051] Next, a method for evaluating the amount of slam-shut clearance of a vehicle hood provided in an embodiment of the present application is described in detail.

[0052] The embodiment of the present application provides a method for evaluating the slam closure of a car hood. Figure 1-Figure 3 Shown, including:

[0053] Obtaining a slam-shut model of each component that affects the slam-shut clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information;

[0054] According to the position information of the cut body, the Mengguan model is cut, and the model of the side where the hood is located is retained to obtain the cut model;

[0055] Apply constraints to the cut model according to the constraint relationship of each component to obtain the constrained model;

[0056] Apply working loads to the constrained model based on working load information to obtain the hood slam-shut analysis model;

[0057] According to the hood slam closure analysis model, determine the hood slam closure clearance;

[0058] Determine whether the slamming amount of the car's front hood meets the requirements.

[0059] The Mengguan model obtained in the embodiment of the present application includes a hood model, a buffer block model, a front bumper model, a sealing strip model, a lower body model, a headlight model and a fender model.

[0060] The obtained model is a three-dimensional model that can be used for simulation analysis, such as a finite element model.

[0061] In this embodiment, when the initial model of the clearance analysis is cut, the cutting surface is parallel to the width direction of the vehicle body, and after the initial model of the clearance analysis is cut, six degrees of freedom constraints are established to fix the model.

[0062] The constraint relationships acquired in this embodiment include connection information, boundary constraint information, and contact relationship and contact type information between components.

[0063] Among them, the connection information between each component includes the rigid connection between the hood and the shotgun, the rigid connection between the sealing strip and the inner panel of the hood or the lower body, the rigid connection between the buffer block and the inner panel of the hood or the lower body, the rigid connection between the front bumper and the lower body, the rigid connection between the front bumper and the grille, the rigid connection between the front bumper and the headlights, the rigid connection between the lower body and the headlights, the rigid connection between the front bumper and the fenders, the rigid connection between the headlights and the fenders, etc.

[0064] Contact types include self-contact and surface-to-surface contact.

[0065] Individual self-contacts include hood self-contact, lower body self-contact, and self-contact of the entire vehicle consisting of the front bumper, grille, headlights, and fenders.

[0066] Surface-to-surface contact includes surface-to-surface contact between the hood lock and the lock, surface-to-surface contact between the hood inner panel and the buffer block, surface-to-surface contact between the hood inner panel and the sealing strip, surface-to-surface contact between the hood and the overall component of the front bumper, grille, headlights and fenders, surface-to-surface contact between the lower body and the buffer block, surface-to-surface contact between the lower body and the sealing strip, surface-to-surface contact between the lower body and the overall component of the front bumper, headlights, grille and fenders, etc.

[0067] The working load information includes the rotation center and rotation angular velocity of the moving parts in the initial model of the clearance analysis.

[0068] The embodiment of the present application can be Figure 2 The slam closure pre-processing tool shown obtains the slam closure model of each component that affects the slam closure clearance of the front hood, the constraint relationship of each component, the position information of the cut body and the working load information.

[0069] Figure 2The function or role corresponding to the serial number

[0070]

[0071]

[0072] In some embodiments, the constraint points serving as boundary conditions are about the sealing strip and buffer block of the front hood. In the simulation data, in order to save computing resources, there is no counterpart at the bottom of the sealing strip at the rear of the front hood, and it is necessary to select a point constraint at the bottom of the sealing strip. Some models also have front sealing strips. In addition, since the buffer block of the front hood of some models is installed on the vehicle body, it may be necessary to select the bottom of the buffer block for constraint.

[0073] In some embodiments, after selecting the component models, constraint relationships, cut-off vehicle body position information and working condition load information through the slam closure pre-processing tool, click the working condition button 22 to start building the hood slam closure analysis model. After the hood slam closure analysis model is built, the hood slam closure analysis model is simulated and analyzed to measure the hood slam closure clearance.

[0074] After obtaining the amount of slam closure of the vehicle's hood, the embodiment of the present application further determines whether the amount of slam closure of the vehicle's hood meets the requirements.

[0075] When the slam closure amount of the automobile hood does not meet the requirement, various parameters affecting the slam closure amount of the hood are optimized until the slam closure amount of the hood meets the requirement.

[0076] When the clearance amount of the front hatch cover is within the required clearance amount range, it is determined that the clearance amount of the front hatch cover of the vehicle meets the requirement;

[0077] When the clearance amount of the front hatch cover slamming shut is not within the required clearance amount range, it is determined that the clearance amount of the front hatch cover slamming shut of the vehicle does not meet the requirement.

[0078] Parameters influencing hood slam clearance include the buffer block mounting point stiffness and TB modes. After optimizing these parameters, the component models are reconstructed based on the optimized parameters, and the hood slam analysis model is updated. Finally, based on the updated hood slam analysis model, the updated hood slam clearance is determined and whether the updated hood slam clearance meets the requirements. If not, the parameters are optimized again and the above steps are repeated.

[0079] The present application also provides a vehicle hood slam closure assessment system, comprising:

[0080] A data acquisition unit is used to obtain a slam-close model of each component that affects the slam-close clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information;

[0081] A hood slam closure analysis model construction unit is used to truncate the slam closure model based on the position information of the truncation body, retain the model of the side where the hood is located, and obtain a truncation model; apply constraints to the truncation model based on the constraint relationship of each component to obtain a constrained model; apply working loads to the constrained model based on working load information to obtain a hood slam closure analysis model;

[0082] A front hood slam closure clearance amount determination unit, configured to determine the front hood slam closure clearance amount based on a front hood slam closure analysis model;

[0083] The clearance optimization unit is used to determine whether the clearance of the car's front hood slamming shut meets the requirements.

[0084] The present invention also discloses a computer device, comprising:

[0085] a processor adapted to execute a computer program;

[0086] A computer-readable storage medium having a computer program stored therein, wherein when the computer program is executed by the processor, a method for evaluating the amount of slam-shut clearance of a vehicle hood disclosed in embodiment 1 is implemented.

[0087] The present invention also discloses a computer-readable storage medium storing a computer program. The computer program is suitable for being loaded by a processor and executed by a method for evaluating the amount of slam-shut clearance of a vehicle hood disclosed in Example 1.

[0088] The present invention also discloses a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the method for evaluating the amount of slam closure of a car hood disclosed in Example 1.

[0089] The method disclosed in Example 1 can be directly implemented as a hardware processor, or can be implemented using a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, it will not be described in detail here.

[0090] Those skilled in the art will appreciate that the units and algorithm steps of the various examples described in conjunction with this embodiment can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0091] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A method for evaluating the slam closure of a car hood, characterized in that: include: Obtaining a slam-shut model of each component that affects the slam-shut clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information; According to the position information of the cut body, the Mengguan model is cut, and the model of the side where the hood is located is retained to obtain the cut model; Apply constraints to the cut model according to the constraint relationship of each component to obtain a constrained model; Apply working loads to the constrained model based on working load information to obtain the hood slam-shut analysis model; According to the hood slam closure analysis model, determine the hood slam closure clearance; Determine whether the slamming amount of the car's front hood meets the requirements.

2. The method for evaluating the slam closure of a vehicle hood as claimed in claim 1, wherein: Determine whether the slam-shut clearance of the car's front hood meets the requirements; When the slam closure amount of the automobile hood does not meet the requirement, various parameters affecting the slam closure amount of the hood are optimized until the slam closure amount of the hood meets the requirement.

3. The method for evaluating the slam closure of a vehicle hood as claimed in claim 1, wherein: When the clearance amount of the front hatch cover slamming shut is within the required clearance amount range, it is determined that the clearance amount of the front hatch cover slamming shut of the vehicle meets the requirement; When the clearance amount of the front hatch cover slamming shut is not within the required clearance amount range, it is determined that the clearance amount of the front hatch cover slamming shut of the vehicle does not meet the requirement.

4. The method for evaluating the slam closure of a vehicle hood as claimed in claim 1, wherein: Constraint relationships include connection information between components, boundary constraint information, and contact relationship and contact type information.

5. The method for evaluating the slam closure of a vehicle hood as claimed in claim 1, wherein: When cutting the initial model for clearance analysis, the cutting surface is parallel to the width direction of the vehicle body.

6. The method for evaluating the slam closure of a vehicle hood as claimed in claim 1, wherein: The working load information includes the rotation center and rotation angular velocity of the moving parts in the initial model of the clearance analysis.

7. A vehicle hood slamming pass rate assessment system, characterized in that: include: A data acquisition unit is used to obtain a slam-close model of each component that affects the slam-close clearance of the front hood, constraint relationships of each component, position information of the cut-off vehicle body, and working load information; A hood slam closure analysis model construction unit is used to truncate the slam closure model based on the position information of the truncation body, retain the model of the side where the hood is located, and obtain a truncation model; apply constraints to the truncation model based on the constraint relationship of each component to obtain a constrained model; apply working loads to the constrained model based on working load information to obtain a hood slam closure analysis model; A front hood slam closure clearance amount determination unit, configured to determine the front hood slam closure clearance amount based on a front hood slam closure analysis model; The clearance optimization unit is used to determine whether the clearance of the car's front hood slamming shut meets the requirements.

8. An electronic device, characterized in that: The device comprises: a processor adapted to execute a computer program; A computer-readable storage medium having a computer program stored therein, wherein when the computer program is executed by the processor, the method for evaluating the amount of slam-shut clearance of a vehicle hood as described in any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor and executing the method for evaluating the amount of slam-shut clearance of a vehicle hood according to any one of claims 1 to 6.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the method for evaluating the slam closure quality of a vehicle hood as claimed in any one of claims 1 to 6 is implemented.

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