Vehicle door inner plate structure optimization method, vehicle door inner plate structure, vehicle door and vehicle

Abstract

The invention discloses a vehicle door inner plate structure optimization method, a vehicle door inner plate structure, a vehicle door and an automobile, and the method comprises the steps: calculating the stress value distribution condition of a target vehicle door inner plate based on a static pressure experiment method and a node contribution analysis method, and carrying out optimization processing when the length of a first connection rib between a mounting hole and a third stiffness region meets a preset value, the optimization processing comprises the steps of cutting off the first connecting rib, arranging a second connecting rib between the mounting hole and the first rigidity area or the second rigidity area according to the distance information, and outputting the structure information of the target vehicle door inner plate after optimization processing. The stress distribution of the vehicle door inner plate is dispersed, the rigidity and the stability of the vehicle door are improved, and the optimization period of the vehicle door inner plate structure is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of automobile doors, and in particular to a door inner panel structure optimization method, a door inner panel structure, a door and an automobile. Background Art

[0002] With the rapid development of the automobile manufacturing industry and the continuous improvement of consumers' requirements for automobile quality, improving the stability of automobile doors has also become an important part of improving vehicle performance and user experience.

[0003] As a component of the door and the main load-bearing part, the structural design of the mounting holes of the inner door panel is directly related to the installation accuracy, sealing performance and overall strength of the door. When designing the door, it is necessary to meet the requirements of door stiffness, appearance coordination, operational convenience, anti-collision safety and durability. Among them, door stiffness, as a basic performance, is the most important indicator in door design. Insufficient door stiffness will affect the smoothness of glass lifting and lowering, the sealing of the interior space, etc.

[0004] It can be seen that how to optimize the structure of the vehicle door to effectively improve the rigidity of the vehicle door has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] The invention provides a door inner panel structure optimization method, a door inner panel structure, a door and a car, so as to enhance the rigidity of the door inner panel.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for optimizing the structure of a vehicle door inner panel, comprising:

[0007] The stress value distribution of the target door inner panel is calculated based on the static pressure test method and the node contribution analysis method, and the first stiffness area, the second stiffness area and the third stiffness area of ​​the target door inner panel are determined according to the stress value distribution.

[0008] Determine the position information of each mounting hole of the target door inner panel.

[0009] The distance information between each of the mounting holes and the first rigidity region and the second rigidity region is obtained according to the position information.

[0010] When the length of the first connecting rib between the mounting hole and the third stiffness area meets the preset value, optimization processing is performed, and the optimization processing includes cutting off the first connecting rib and arranging the second connecting rib between the mounting hole and the first stiffness area or the second stiffness area according to the distance information.

[0011] The structural information of the target door inner panel after optimization processing is output.

[0012] Furthermore, the door inner panel structure optimization method further includes:

[0013] According to the position information, a first mounting hole at a position of a variable cross-section of the target door inner panel is determined.

[0014] A third connecting rib is arranged between the first mounting hole and the second rigidity region.

[0015] Furthermore, the door inner panel structure optimization method further includes:

[0016] A second mounting hole at the target door inner panel lifter position is determined according to the position information.

[0017] An annular rib is arranged on the outer side of the second mounting hole.

[0018] Furthermore, there are two groups of the second mounting holes, and main reinforcing ribs are arranged between each group of the second mounting holes.

[0019] Furthermore, the door inner panel structure optimization method further includes:

[0020] The structural information is input into a pre-built finite element simulation model.

[0021] According to the results output by the finite element simulation model, a stiffness test, a stability test and a durability test of the vehicle door are carried out in sequence.

[0022] Further, after sequentially performing a door stiffness test, a stability test, and a durability test according to the results output by the finite element simulation model, the method further includes:

[0023] The structure of the target door inner panel is optimized and adjusted according to the test results.

[0024] Furthermore, the door inner panel structure optimization method further includes:

[0025] Generate a corresponding test report based on the test results and send it to the corresponding test terminal.

[0026] Another embodiment of the present invention provides a vehicle door inner panel structure, which is prepared by the vehicle door inner panel structure optimization method as described above.

[0027] Another embodiment of the present invention provides a vehicle door, comprising the vehicle door inner panel structure as described above.

[0028] Another embodiment of the present invention provides a car, comprising a plurality of the doors described above.

[0029] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0030] (1) For mounting holes close to the weak zone, cutting off the ribs leading to the weak zone can enhance the bearing capacity of the corresponding mounting holes and avoid deformation of the door structure;

[0031] (2) Arranging reinforcing ribs leading to the strong area of ​​the mounting holes at the edge of the variable cross-section can significantly improve the strength of the corresponding mounting holes, help resist external impact and collision, and ensure better integrity and stability of the door under external forces;

[0032] (3) An annular rib is arranged around the installation hole of the lifter to surround the installation hole, which can improve the overall rigidity of the vehicle door. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A flow chart of the steps of a method for optimizing the structure of a vehicle door inner panel provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of vehicle door partitions for a vehicle door inner panel structure optimization method provided by an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the arrangement of ribs in a method for optimizing the structure of a vehicle door inner panel provided by an embodiment of the present invention;

[0036] Figure 4 A first deformation comparison diagram of a door inner panel structure provided by an embodiment of the present invention and a conventional door structure;

[0037] Figure 5 A second deformation comparison diagram of the door inner panel structure provided by an embodiment of the present invention and a traditional door structure;

[0038] Figure 6 A third deformation comparison diagram of the door inner panel structure provided by an embodiment of the present invention and a traditional door structure;

[0039] Figure 7 A comparison diagram of the door inner panel structure provided by an embodiment of the present invention and a traditional door structure. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of this application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0044] An embodiment of the present invention provides a method for optimizing the structure of a vehicle door inner panel. For details, see Figure 1 , Figure 1 The flowchart of the method for optimizing the structure of the inner door panel in one embodiment of the present invention includes steps S11 to S15:

[0045] Step S11, calculating the stress value distribution of the target door inner panel based on the static pressure test method and the node contribution analysis method, and determining the first stiffness area, the second stiffness area and the third stiffness area of ​​the target door inner panel according to the stress value distribution.

[0046] The car door is a medium for the passengers and cargo to connect inside and outside the car, and is one of the important independent parts of the car body. The inner door panel is the main force-bearing component, and the accessory mounting holes are all over the inner panel. The stiffness of the mounting holes directly affects the installation and performance of functional parts, such as the installation reliability of the interior panel and the sound quality of the speaker. Therefore, the structure of the inner door panel needs to be optimized to improve the stiffness of the door.

[0047] This embodiment optimizes the mounting holes on the door inner panel. Specifically, it is necessary to first obtain the strong and weak rigidity partitioning of the target door inner panel. The partitioning process of the target door inner panel is as follows:

[0048] Based on the static pressure test method, static pressure is applied to the target door inner panel to simulate the stress conditions during actual use, and the strain data of different areas of the target door inner panel under static load are recorded and measured.

[0049] Preferably, the obtained strain data can be converted into stress values, and a stress distribution diagram can be drawn to intuitively display the stress states of the door inner panel in different areas.

[0050] A numerical model of the target door inner panel is established, the model is meshed, and nodes and units are determined.

[0051] The same load as in the above static pressure test was applied to the model of the target door inner panel, and the strain contribution data of each node and unit was calculated using the finite element analysis method.

[0052] The different strain data of the target door inner panel and the strain contribution data of each node are converted into stress values ​​to obtain the stress value distribution of the target door inner panel.

[0053] The target door inner panel is divided into a first stiffness region, a second stiffness region and a third stiffness region according to the stress value distribution of the target door inner panel.

[0054] The partition results are as follows Figure 2 As shown, the first stiffness area is the strong area, which is mostly the hinge position, the lock constraint position, and the area ① with a reinforcing plate and deep-drawn draw ribs; the second stiffness area is the secondary strong area, which is mostly the area ② with a reinforcing plate or deep-drawn draw ribs; the third stiffness area is the weak area, which is mostly the position around the through hole and the center of the plate body.

[0055] Through zoning, the key stress-bearing areas in the door inner panel can be identified and strengthened, thereby improving its structural strength, providing a basis for the subsequent arrangement of reinforcement ribs, optimizing the layout process, and reasonably arranging reinforcement measures for the mounting holes.

[0056] Step S12, determining the position information of each mounting hole of the target door inner panel.

[0057] The total number of mounting holes, the types of mounting holes, and the position information of each mounting hole on the target door inner panel are obtained for subsequent optimization based on the mounting hole position information.

[0058] Step S13, obtaining distance information between each of the mounting holes and the first rigidity region and the second rigidity region according to the position information.

[0059] Since some mounting holes need to be provided with ribs leading to the strong / secondary strong areas, it is necessary to obtain the distance between each mounting hole and the nearest first stiffness area and second stiffness area in advance based on the position information to determine the specific position to which the reinforcing ribs of the mounting hole lead.

[0060] It should be noted that the selection of the first stiffness area / the second stiffness area to which the mounting holes lead is mainly based on distance information in this embodiment. In the actual optimization process, adjustments may also be made based on the specific structure of the door inner panel and the distribution of the mounting holes.

[0061] Step S14, performing optimization processing when the length of the first connecting rib between the mounting hole and the third stiffness area meets the preset value, the optimization processing including cutting off the first connecting rib and arranging the second connecting rib between the mounting hole and the first stiffness area or the second stiffness area according to the distance information.

[0062] Preferably, in order to increase the main strength of the target door inner panel, the present embodiment arranges a main reinforcing rib on the target door inner panel, the main reinforcing rib is connected to the second mounting hole at the upper and lower lifter positions, spans the weak area of ​​the target door inner panel, forms a main force transmission path, and serves as a reinforcement area, that is, Figure 2 The third area in the figure increases the distribution area of ​​the stiffness strong zone of the target door inner panel and forms the main force-bearing frame of the target door inner panel.

[0063] Specifically, the ribs of the target door are arranged as follows: Figure 3 As shown, a mounting hole connected to the third stiffness region by a first connecting rib is obtained, and whether the first connecting rib needs to be cut off is determined according to the length of the first connecting rib. Specifically, when a mounting hole is too close to the third stiffness region, the first connecting rib between the mounting hole and the third stiffness region is cut off. The cut-off position is as shown in FIG. Figure 3 As shown in (b), the preset threshold for judging whether the mounting hole is too close to the third stiffness region is obtained based on simulation analysis.

[0064] In addition, for each mounting hole whose distance from the third stiffness area is less than a preset threshold, ribs leading to the strong area / secondary strong area need to be arranged to disperse the force around the mounting hole and guide it to the strong area / secondary strong area.

[0065] According to the distance information, the area to which each mounting hole needs to be directed is selected, and then the second connecting ribs leading to the first stiffness area / the second stiffness area are arranged for the mounting holes. The ribs are arranged in the following positions: Figure 3 (c) as shown.

[0066] Preferably, the present embodiment further comprises, according to the position information, arranging an annular rib on the outer side of the second mounting hole at the position of the lifter of the target door inner panel, so as to strengthen the rigidity of the lifter mounting hole, wherein the cross section of the annular rib is a "J" shape, and the arrangement of the annular rib is as follows: Figure 3 (a).

[0067] Preferably, the annular ribs of this embodiment serve as a structural reinforcement, one of whose main functions is to enhance the stiffness of the mounting hole and its surroundings. Therefore, the annular ribs can also be arranged around other mounting holes to enhance the stiffness and deformation resistance of the corresponding mounting holes. For example, they can be arranged around the mounting holes in weak areas to enhance the stability of the structure around the mounting holes; and they can be arranged around the mounting holes in ordinary areas to improve the bearing capacity of the mounting hole structure while enhancing the stiffness of the corresponding area.

[0068] Preferably, the present embodiment further comprises, according to the position information, determining the first mounting hole of the target door inner panel variable cross-section position interrupting the cross-section force transmission path, arranging a third connecting rib between the first mounting hole and the second stiffness area, the third connecting rib being a guide rib, connecting the two ends of the first mounting hole, providing a strong area force transmission path for the two ends of the first mounting hole, and the arrangement of the guide rib is as follows: Figure 3 (c) as shown.

[0069] By cutting off the reinforcing ribs leading to the third stiffness area from the mounting hole, the stress on the weak area can be reduced, thus preventing the area from undergoing plastic deformation or rupture due to stress concentration. At the same time, by arranging ribs leading to the first / second stiffness area, the stress can be dispersed to areas with higher strength, thereby improving the load-bearing capacity of the entire door inner panel.

[0070] The arrangement of the ribs leading from the mounting holes to the strong area can also enhance the overall structural strength of the door inner panel, thereby increasing its impact resistance when subjected to external force and being able to better resist deformation, thereby protecting the occupants of the vehicle when a collision occurs.

[0071] In addition, stronger door inner panel structures can reduce the extent of damage caused by collisions or accidents, thereby reducing repair costs.

[0072] Step S15, outputting the structural information of the target door inner panel after optimization processing.

[0073] After completing the optimization design of the target door inner panel structure, the structural information of the target door inner panel is output.

[0074] In order to further improve the stiffness performance of the target door inner panel, the structural information of the target door inner panel was input into the pre-built finite element simulation model, and the door stiffness test, stability test and durability test were carried out in sequence.

[0075] According to the results of the above tests, the structure of the target door inner panel is optimized and adjusted iteratively until the optimization result meets the preset optimization requirements.

[0076] A corresponding test report is generated based on the test results and sent to the corresponding test terminal. By analyzing the test report, we can gain an in-depth understanding of the performance of the vehicle door, including its structural strength, sealing, etc.

[0077] This embodiment takes the stiffness test as an example and illustrates the effect of the solution of this embodiment by comparing the deformation results of the mounting holes, as shown in Table 1. Table 1 is a comparison table of the deformation of the mounting holes.

[0078]

[0079]

[0080] Table 1 is a comparison table of mounting hole deformation

[0081] The mounting hole number positions in Table 1 are distributed as follows: Figure 7 As shown, Figure 7 (a) is the structure of a traditional door inner panel. Figure 7 (b) is the structure of the door inner panel after being optimized according to the method of this embodiment. From the comparison results in the above table, it can be seen that the deformation of each mounting hole of the door inner panel optimized according to the scheme of this embodiment is significantly improved in stiffness compared with the deformation of the mounting holes of the traditional door inner panel. The door designed using the scheme of this embodiment not only meets the stiffness design requirements, but also achieves weight reduction.

[0082] In addition, the optimization efficiency of the solution proposed in this embodiment is also improved, and the development cycle is reduced from 6 to 8 weeks for optimization analysis using traditional methods to 1 to 2 weeks.

[0083] This embodiment also provides a deformation comparison diagram of the door inner panel structure and the traditional door structure. Specifically, Figures 4 to 6 The deformation comparison diagram of the door inner panel structure provided by the embodiment of the present invention and the traditional door structure is shown in FIG. Figure 4 (a) shows the deformation of the lifter mounting hole of the traditional door inner panel, with a deformation of 1.99 mm. Figure 4 (b) shows the deformation of the lifter mounting hole after annular ribs are arranged according to the solution of this embodiment, with a deformation of 1.30 mm. Figure 5 (a) shows the deformation of the mounting hole of the conventional door inner panel without rib truncation, with a deformation of 2.24 mm. Figure 5 (b) is the deformation after the rib leading to the weak area is cut off in the mounting hole near the weak area according to the solution of this embodiment, with a deformation of 2.0 mm. Figure 5 (c) shows the deformation after annular ribs are arranged on the installation hole of the lifter according to the solution of this embodiment and the ribs connecting the weak areas are cut off, with a deformation of 1.67 mm. Figure 6 (a) shows the deformation of the traditional door inner panel without reinforcing ribs arranged between the mounting hole and the strong zone, with a deformation of 2.05 mm. Figure 6 (b) shows the deformation after reinforcing ribs leading to the strong area / secondary strong area are arranged on the mounting hole according to the solution of this embodiment, and the deformation is 1.57 mm.

[0084] The vehicle door inner panel structure optimization method of the present invention cuts off the ribs leading to the weak area for the mounting holes close to the weak area, thereby enhancing the bearing capacity of the corresponding mounting holes, reducing the stress borne by the weak area, and avoiding deformation of the door structure caused by plastic deformation or rupture in the area due to stress concentration; arranging reinforcing ribs leading to the strong area for the mounting holes close to the weak area and the mounting holes at the edge of the variable cross-section, can disperse the stress to the area with higher strength, thereby improving the bearing capacity of the entire vehicle door inner panel, significantly improving the strength of the corresponding mounting holes, helping to resist external impacts and collisions, and ensuring better integrity and stability of the door under the action of external forces; arranging annular ribs around the installation holes of the lifter to surround the installation holes can improve the overall rigidity of the vehicle door.

[0085] The arrangement of the ribs with the mounting holes leading to the strong area can also enhance the overall structural strength of the door inner panel, increase its impact resistance when subjected to external force, and better resist deformation, thereby protecting the occupants in the event of a vehicle collision. In addition, a stronger door inner panel structure can reduce the degree of damage caused by collisions or accidents, thereby reducing maintenance costs. Through the reasonable arrangement of the ribs, the material of the door inner panel can also be used more effectively, avoiding material waste or excessive thinning in the weak area.

[0086] An embodiment of the present invention further provides a vehicle door inner panel structure, which is obtained by the vehicle door inner panel structure optimization method as described above.

[0087] An embodiment of the present invention further provides a vehicle door, comprising the vehicle door inner panel structure as described above.

[0088] An embodiment of the present invention further provides a car, comprising a plurality of the car doors as described above.

[0089] The technical features and technical effects of the vehicle door inner panel structure, vehicle door and automobile proposed in the embodiment of the present invention are the same as those of the method proposed in the embodiment of the present invention, and are not described in detail here. The above-mentioned vehicle door inner panel structure, vehicle door and vehicle door inner panel part in the automobile can be realized by the above-mentioned vehicle door inner panel structure optimization method.

[0090] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for optimizing the structure of a vehicle door inner panel, characterized in that: include: Calculating the stress value distribution of the target door inner panel based on the static pressure test method and the node contribution analysis method, and determining the first stiffness region, the second stiffness region and the third stiffness region of the target door inner panel according to the stress value distribution; Determining position information of each mounting hole of the target door inner panel; Obtaining distance information between each of the mounting holes and the first stiffness region and the second stiffness region according to the position information; When the length of the first connecting rib between the mounting hole and the third stiffness region meets a preset value, an optimization process is performed, wherein the optimization process includes cutting off the first connecting rib and arranging a second connecting rib between the mounting hole and the first stiffness region or the second stiffness region according to the distance information; The structural information of the target door inner panel after optimization processing is output.

2. The method for optimizing the door inner panel structure according to claim 1, characterized in that: The door inner panel structure optimization method further includes: Determine, according to the position information, a first mounting hole at a variable cross-section position of the target door inner panel; A third connecting rib is arranged between the first mounting hole and the second rigidity region.

3. The method for optimizing the door inner panel structure according to claim 1, characterized in that: The door inner panel structure optimization method further includes: Determining a second mounting hole at a position of the target door inner panel lifter according to the position information; An annular rib is arranged on the outer side of the second mounting hole.

4. The method for optimizing the door inner panel structure as claimed in claim 3, characterized in that: There are two groups of the second mounting holes, and main reinforcing ribs are arranged between each group of the second mounting holes.

5. The method for optimizing the door inner panel structure according to claim 1, characterized in that: The door inner panel structure optimization method further includes: inputting the structural information into a pre-built finite element simulation model; According to the results output by the finite element simulation model, a stiffness test, a stability test and a durability test of the vehicle door are carried out in sequence.

6. The method for optimizing the door inner panel structure according to claim 5, characterized in that: After sequentially performing a door stiffness test, a door stability test, and a door durability test according to the results output by the finite element simulation model, the method further includes: The structure of the target door inner panel is optimized and adjusted according to the test results.

7. The method for optimizing the door inner panel structure as claimed in claim 5, characterized in that: The door inner panel structure optimization method further includes: Generate a corresponding test report based on the test results and send it to the corresponding test terminal.

8. A door inner panel structure, characterized in that: Obtained by the vehicle door inner panel structure optimization method as described in claims 1-7.

9. A vehicle door, characterized in that: It comprises the vehicle door inner panel structure as claimed in claim 8.

10. An automobile, characterized in that: The vehicle comprises a plurality of vehicle doors as claimed in claim 9.

Images