CN116628835A - Anti-dent analysis method and device, electronic equipment and vehicle - Google Patents
Anti-dent analysis method and device, electronic equipment and vehicle Download PDFInfo
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Abstract
The disclosure relates to an analysis method, an analysis device, electronic equipment and a vehicle for concavity resistance, and relates to the technical field of testing, wherein the method comprises the following steps: firstly, obtaining a concave resistance simulation result corresponding to a test point on an automobile panel; obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position; and then determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result. By applying the technical scheme disclosed by the invention, the anti-dishing analysis result which is closer to the actual feeling of the user can be obtained, and the satisfaction degree of the user feeling of the test point can be reflected.
Description
Technical Field
The disclosure relates to the technical field of automobile testing, in particular to a method and a device for analyzing concavity resistance, electronic equipment and a vehicle.
Background
The automobile panel can generate dent and even local deformation when bearing static loads such as artificial pressing, snow pressure and the like and impact dynamic loads such as flying sand, flying stone and the like in the running process, thereby greatly affecting the beauty and safety of the automobile. With the development of the automobile industry and the continuous consumption of non-renewable energy sources, automobile manufacturers have had to use thinner steel plates as outer covers of automobiles in order to save energy consumption and meet the strict emission standards set by the country. The dent resistance of the automobile panel is an important basis for evaluating whether the thinning and material substitution of the panel are acceptable, and therefore, it is necessary to study the dent resistance of the automobile panel.
The automobile has no real automobile in the early design stage, so that the anti-dent property experiment cannot be carried out. Currently, in the analysis of dent resistance, a model of an automobile panel can be built by a finite element method, and then dent resistance analysis is performed. And comparing the measured value with a single standard value to determine whether the dent resistance of the loading point is qualified.
However, in the automobile panel manufactured according to the analysis method, the user is likely to fail to meet the test standard in the actual pressing test, and reworking manufacturing is likely to be caused, so that not only is resource waste caused, but also the test cost is increased.
Disclosure of Invention
In view of the above, the present disclosure provides an analysis method, an apparatus, an electronic device and a vehicle for dent resistance, which are mainly aimed at improving the technical problems that in the prior art, the dent resistance analysis method is not suitable for the actual pressing test of the user, and reworking is easy to be caused, which not only causes resource waste, but also increases the test cost.
In a first aspect, the present disclosure provides a method of analyzing dent resistance, comprising:
obtaining a dent resistance simulation result corresponding to a test point on the automobile panel;
obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position;
and determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result.
In a second aspect, the present disclosure provides an assay device for dent resistance comprising:
the acquisition module is configured to acquire a concave resistance simulation result corresponding to a test point on the automobile panel; obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position;
and the determining module is configured to determine the anti-dishing analysis result corresponding to the test point based on the acquired user scoring information and the anti-dishing simulation result.
In a third aspect, the present disclosure provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of analyzing dent resistance according to the first aspect.
In a fourth aspect, the present disclosure provides an electronic device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, the processor implementing the method for analyzing dent resistance according to the first aspect when executing the computer program.
In a fifth aspect, the present disclosure provides a vehicle comprising: the apparatus according to the second aspect, or the electronic device according to the fourth aspect.
By means of the technical scheme, the anti-dishing analysis method, the device, the electronic equipment and the vehicle are capable of achieving correlation between the anti-dishing simulation result and subjective evaluation of a user and obtaining the anti-dishing analysis result which is closer to real feeling of the user compared with the prior art. Firstly, obtaining a concave resistance simulation result corresponding to a test point on an automobile panel; obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position; and then determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result. By applying the technical scheme disclosed by the invention, the anti-dishing analysis result which is closer to the actual feeling of the user can be obtained, and the satisfaction degree of the user feeling of the test point can be reflected. According to the automobile panel manufactured by the analysis method, in the actual pressing test of a user, the success rate of meeting the test standard can be improved, the reworking manufacturing condition is reduced, the resource waste can be reduced, and the test cost can be saved.
The foregoing description is merely an overview of the technical solutions of the present disclosure, and may be implemented according to the content of the specification in order to make the technical means of the present disclosure more clearly understood, and in order to make the above and other objects, features and advantages of the present disclosure more clearly understood, the following specific embodiments of the present disclosure are specifically described.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of an analysis method for dent resistance according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for analyzing dent resistance provided by an embodiment of the present disclosure;
FIG. 3 shows a schematic diagram of a meshing structure provided by an embodiment of the present disclosure;
FIG. 4 illustrates an example flow diagram for calculating an initial stiffness provided by embodiments of the present disclosure;
FIG. 5 illustrates an example flow diagram provided by embodiments of the present disclosure for determining whether buckling has occurred;
fig. 6 shows a schematic structural diagram of an analysis device for dent resistance according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In order to improve the automobile panel manufactured according to the prior art in the anti-dent analysis mode, in the actual pressing test of a user, the test standard is likely to be not met, and reworking manufacturing is easily caused, so that not only is the resource waste caused, but also the technical problem of test cost is increased. An embodiment of the present disclosure provides a method for analyzing dent resistance, as shown in fig. 1, the method comprising:
and 101, acquiring a dent resistance simulation result corresponding to a test point on the automobile panel.
The automobile panel is a surface or an internal part of a space shape formed by a metal sheet for covering an engine and a chassis to constitute a cab and a vehicle body, and is divided into an external panel, an internal panel, a skeleton panel, and the like according to functions and parts. Dent resistance refers to the ability of an automobile panel to withstand external loads, resist dent deflection and localized dent deformation, and retain shape in the automotive manufacturing field. Dent resistance of automobile panels is an important basis for evaluating whether the thinning and material replacement of the panels are acceptable.
Embodiments of the present disclosure may be modeled by a finite element method for dent resistance analysis. And obtaining the anti-dent simulation results of maximum displacement, initial rigidity, buckling and the like corresponding to the test points on the automobile panel through simulation calculation. In contrast to comparing with a single standard value to determine whether the dent resistance of the test point is qualified, the embodiment of the disclosure can correlate the dent resistance simulation result with the user actual experience to obtain a dent resistance analysis result closer to the user actual experience, and specifically can execute the processes shown in steps 102 to 103.
Step 102, obtaining user scoring information corresponding to the anti-dishing simulation result from a preset storage position.
The user grading information is anti-dent test grading information of the user on the same or similar real parts as the automobile panel, and preset storage positions (such as a preset table or database) store the user grading information respectively corresponding to different anti-dent simulation results.
For example, the anti-dishing simulation result may be associated with the subjective evaluation of the user in advance, and user scoring information corresponding to different anti-dishing simulation results may be stored in a preset table. In a specific use process, according to the anti-dent performance simulation result corresponding to the test point on the current automobile panel, user scoring information corresponding to the anti-dent performance simulation result can be obtained from the preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel. Furthermore, the maximum displacement, the initial rigidity and the buckling result in the simulation result can be used as judgment standards by the embodiment of the present disclosure, and subjective evaluation of the test point user can be comprehensively scored, so that the satisfaction degree of the user at the location can be detailed.
And step 103, determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result.
For example, according to the user scoring content corresponding to the dent resistance simulation result of the current test point, it can be directly known whether the test standard can be satisfied in the actual pressing test of the user if the automobile panel manufactured according to the standard. If the corresponding user score is lower, the concave resistance of the test point is poorer, a finished product is not required to be manufactured, corresponding adjustment can be performed in advance, then concave resistance analysis of the embodiment of the disclosure is performed, and whether the concave resistance at the test point meets the design requirement is judged. If the corresponding user score is higher, the test point has better dent resistance, and a finished product can be correspondingly manufactured.
The embodiment of the disclosure can realize the association of the anti-dishing simulation result and the subjective evaluation of the user, obtain the anti-dishing analysis result which is closer to the actual feeling of the user, and can embody the satisfaction degree of the user feeling of the test point. According to the automobile panel manufactured by the analysis method, in the actual pressing test of a user, the success rate of meeting the test standard can be improved, the reworking manufacturing condition is reduced, the resource waste can be reduced, and the test cost can be saved.
Further, as a refinement and extension of the foregoing embodiments, in order to fully describe a specific implementation procedure of the method of the embodiment of the disclosure, the embodiment of the disclosure provides a specific method as shown in fig. 2, where the method includes:
step 201, pre-establishing mapping relations between different user scoring information and respectively corresponding anti-dishing simulation results.
For example, for a real part of a different automobile panel, it is necessary to judge in advance a part to be subjected to dent resistance evaluation by a professional, select points at intervals of 100mm in this region, and mark the test points with a circular patch of 30mm diameter marked with a serial number. The subjective feeling evaluation scores of the users can be classified into 6 grades, and the related descriptions and scores can be shown in the following table 1.
TABLE 1
When the pressing is performed, the center of the contact part of the finger or palm of the tester and the test part is required to be overlapped with the round patch as much as possible, and the pressing mode of the tester is not limited. And counting the scoring of each test point, and obtaining the average subjective evaluation scoring of the test point after averaging. For example, different testers score the same test site separately and then average the scores as the average subjective evaluation score for that test site.
As shown in table 1, the test points are divided into six groups according to subjective scores, and the test points in each group can be subjected to the dent resistance analysis by establishing a model through a finite element method. The sag resistance of the test point can be simulated by using an arc length method. After a model is built and test points are selected according to the mode, firstly, grid division is carried out, a circle with the diameter of 25.4mm is built at the center of a circular patch, the circle is projected onto the surface of a test part along the normal direction of a nearest shell unit at the center, the center is projected during projection, the consistency of grid nodes and the coordinates of the center is ensured, the nodes at the center are built into a set and named, the divided grid is shown as a figure 3, and the center point in the figure is the center. And establishing a local coordinate system by taking the normal direction of the shell unit closest to the circle center as a Z axis of the local coordinate system and taking the circle center as an origin. The local coordinate system X, Y axis is not specified. The purpose of establishing the local coordinate system is to output the maximum displacement of the center of a circle under the local coordinate system in the simulation result for the determination of the dent resistance.
The vertical loading surface is then loaded in a circle at a pressure of 0.2962MPa inwards (e.g. 150N total). The geometric nonlinearity is opened. The analysis method is an arc length method, the initial arc length is 0.1, the maximum arc length is 1, the increment step of the minimum arc length is 0.05, the increment step of the maximum arc length is 0.1, and the maximum load proportion coefficient is 1. In order to output the displacement at the center of the circle in the result, a keyword "× NODE PRINT, nset=setname U, COORD" needs to be set, where SetName is the set name of the NODE at the established center of the circle. Finally, constraint conditions are set, the vehicle body with the cutting distance of 500mm from the test part is cut off, and the degree of freedom of the cut-off section 1-6 direction of the vehicle body is constrained.
After the parameter configuration is completed, the analysis result is specifically calculated as follows:
for reading the load time step vector Vt at the center node: [ t1 … … tn ], displacement vector Vd in local coordinate system: [ d1 … … dn ]. The vector Vf of the resultant force (for example, the resultant force is 150N) of the loading in the circle under the loading time can be obtained through calculation: [ f1 … … fn ], the specific calculation formula is shown in the following formula one:
V f ＝150×V t (equation I)
The final output maximum load time step is greater than 1 when the arc length method is calculated, and in order to obtain the maximum displacement when the load time step is 1, the load time step vector and the displacement vector are required to be used for carrying out difference calculation, and a specific calculation formula is as follows:
wherein V is t Representing the load time step vector at the test point, V t [-1]Representing the penultimate value of the load time step vector, V t [-2]Representing the penultimate value of the load time step vector; v (V) d Representing displacement vector of the test point under the local coordinate system, V d [-1]Representing the penultimate value of the displacement vector, V d [-2]Representing the penultimate value of the displacement vector.
The stiffness at a loading force resultant of 30N was calculated as the initial stiffness, the calculation flow is shown in fig. 4, and a=v f [n]And b=v f [n+1]Starting from n=0, iterating, terminating the iteration when it is determined that a is less than 30 and b is greater than or equal to 30, and finally determining the stiffness when the loading resultant force is 30N by the following formula three;
(V f [n+1]-V f [n])/(V d [n+1]-V d [n]) (equation three)
Wherein V is f Representing a resultant force vector (as shown in formula one) loaded at the test point at the load time; v (V) f [n+1]Greater than or equal to 30, and V f [n]Less than 30.
Judging whether buckling occurs according to whether the time load step generates withdrawal or not, wherein the calculation flow is shown in fig. 5, and a=v t [n]And b=v t [n+1]Iteration is started from n=0, and n+1=v is determined t Terminating the iteration when the vector length of (2) is equal to or greater than the threshold value, determining V t Whether or not there is V t [n]Greater than V t [n+1]The method comprises the steps of carrying out a first treatment on the surface of the If V t V in (1) t [n]Are all less than or equal to V t [n+1]Then determining buckling at the test point and connecting V t [n]Multiplying 150 (such as 150N total force) to obtain a force value F when buckling occurs at the test point; if V t In the absence of V t [n]Greater than V t [n+1]And determining that buckling does not occur at the test point.
The maximum displacement, the initial rigidity and the buckling condition at the circle center can be calculated according to the processes. If buckling occurs, a force value at the buckling position can be obtained. Dividing test points into six groups according to subjective scoring, judging whether simulation results capable of representing subjective scores of each group exist or not, and if so, using the simulation results as anti-dishing analysis standards corresponding to the subjective scores of the group; if not, the initial stiffness calculation load is changed, and then calculation is performed again by referring to the calculation process until simulation results which can characterize each set of subjective scores are found. Thus, the corresponding simulation result ranges under different subjective experiences can be obtained. For the gear which is subjectively perceived as buckling, only buckling force in the simulation result needs to be confirmed, if buckling force proves that buckling occurs, otherwise, no buckling occurs. Finally, the simulation results corresponding to the test points in each group have the corresponding relation of the following table 2 after statistics.
TABLE 2
D in Table 2 1 -D 2 、D 3 -D 4 、…D 11 -D 12 The range intervals of maximum deformation are respectively represented; k (K) 1 -K 2 、K 3 -K 4 、…K 11 -K 12 Respectively representing the range intervals of the initial stiffness.
In some embodiments, step 201 may specifically include: firstly, comparing the end value of the maximum displacement value simulation result range corresponding to the first scoring information with the end value of the maximum displacement value simulation result range corresponding to the second scoring information, wherein the first scoring information and the second scoring information are scoring information of adjacent grades; and then, according to the comparison result of the end point value of the maximum displacement value simulation result range, adjusting the maximum displacement value simulation result range respectively corresponding to the first scoring information and the second scoring information.
For example, as shown in Table 2, the scoring range is 1-2 points, the maximum deformation corresponds to D 3 -D 4 The method comprises the steps of carrying out a first treatment on the surface of the Scoring range 3-4 points, maximum deformation corresponding to D 5 -D 6 . Judging the maximum deformation upper limit D corresponding to 1-2 points 4 3-4 minutes corresponds to the maximum deformation lower limit D 5 : if D 4 Less than D 5 The maximum deformation range is adjusted to D 3 -D 5 (1-2 minutes) and D 5 -D 6 (3-4 minutes); if D 4 Greater than D 5 The maximum deformation range is adjusted to D 3 -D 4 (1-2 minutes) and D 4 -D 6 (3-4 minutes). If the scoring range is 1-2 points, the maximum deformation corresponds to a range value of 1-5 points, the scoring range is 3-4 points, the maximum deformation corresponds to a range value of 4-10 points, and after comparison and adjustment, the final corresponding relation is as follows: scoring a range of 1-2 points, the maximum deformation corresponding to a range value of 1-5; scoring ranges from 3 to 4 points, with maximum deformation corresponding to range values of 5 to 10. If the scoring range is 1-2 points, the maximum deformation corresponds to a range value of 1-5 points, the scoring range is 3-4 points, the maximum deformation corresponds to a range value of 6-10 points, and after comparison and adjustment, the final corresponding relation is as follows: scoring a range of 1-2 points, the maximum deformation corresponding to a range value of 1-6; scoring ranges from 3 to 4 points, with maximum deformation corresponding to range values of 6 to 10.
By the adjustment mode, the judgment standard can be improved, the correlation between the anti-dishing simulation result (maximum deformation) and the subjective evaluation of the user can be better, the anti-dishing analysis result which is closer to the actual feeling of the user can be obtained, and the satisfaction degree of the user feeling of the test point can be reflected.
In some embodiments, step 201 may specifically further include: comparing the end point value of the initial stiffness simulation result range corresponding to the first scoring information with the end point value of the initial stiffness simulation result range corresponding to the second scoring information; and then, according to the comparison result of the end point values of the initial stiffness simulation result range, adjusting the initial stiffness simulation result range corresponding to the first scoring information and the second scoring information respectively.
For example, as shown in Table 2, the scoring range is 1-2 points, and the stiffness value (initial stiffness) corresponds to K 3 -K 4 The method comprises the steps of carrying out a first treatment on the surface of the Scoring range is 3-4 points, and the rigidity value corresponds to K 5 -K 6 . Judging the upper limit K of the stiffness value corresponding to 1-2 minutes 4 Lower limit K of stiffness value corresponding to 3-4 minutes 5 : if K 4 Less than K 5 The stiffness value range is adjusted to K 3 -K 5 (1-2 minutes) and K 5 -K 6 (3-4 minutes); if K 4 Greater than K 5 The stiffness value range is adjusted to K 3 -K 4 (1-2 minutes) and K 4 -K 6 (3-4 minutes). If the scoring range is 1-2 points, the stiffness value corresponds to a range value of 1-7, the scoring range is 3-4 points, the stiffness value corresponds to a range value of 6-10, and after comparison and adjustment, the final corresponding relation is as follows: scoring a range of 1-2 points, the stiffness value corresponding to a range of 1-7 points; scoring ranges from 3 to 4 points, and stiffness values correspond to range values of 7 to 10. If the scoring range is 1-2 points, the stiffness value corresponds to the range value of 1-3 points, the scoring range is 3-4 points, the stiffness value corresponds to the range value of 4-10 points, and after comparison and adjustment, the final corresponding relation is as follows: scoring a range of 1-2 points, the stiffness value corresponding to a range of 1-4; scoring ranges from 3 to 4 points, and stiffness values correspond to range values of 4 to 10.
By the adjustment mode, the judgment standard can be improved, the correlation between the anti-dishing simulation result (initial rigidity) and the subjective evaluation of the user can be better, the anti-dishing analysis result which is closer to the actual feeling of the user can be obtained, and the satisfaction degree of the user feeling of the test point can be reflected.
The embodiment of the disclosure provides a method for anti-concave simulation analysis and a method for calculating an anti-concave evaluation index. The maximum displacement, the initial rigidity, the buckling and the subjective evaluation scoring are associated through the simulation method, a simulation result range for directly obtaining the subjective evaluation scoring can be obtained, the dent resistance of different parts can be rapidly and quantitatively evaluated through the simulation result, and then the structural design is improved. The time and cost for changing the design due to the fact that the dent resistance in the later design period is not met are greatly reduced, and the development time is shortened.
Step 202, storing mapping relations between different user scoring information and respectively corresponding anti-dishing simulation results in a preset storage position.
For example, the mapping relationship shown in table 2 is stored in a preset list or database.
The following starting from step 203 to step 207 is a procedure describing how to use the mapping relation, i.e. to perform a dent resistance analysis of the current automobile panel.
Step 203, creating model data of the automobile panel.
And 204, selecting test points on the model data, meshing the model data of the automobile covering part according to the test points, and configuring corresponding simulation parameter information.
In some embodiments, configuring the corresponding simulation parameter information includes: establishing a local coordinate system according to the position of the test point on the model data; loading the pressure corresponding to the first preset resultant force value (for example, the pressure with the resultant force of 150N is 0.2962 MPa) at the position of the test point, and configuring the relevant information of the loading time step and the constraint condition information.
The specific implementation procedure may be referred to in the corresponding description in step 201, and will not be described herein.
And 205, performing simulation on the dent resistance of the test point selected from the model data of the automobile panel by using an arc length method to obtain a dent resistance simulation result corresponding to the test point.
In some embodiments, step 205 may specifically include: at the test point, obtaining a maximum displacement value when the load time step is a preset time step value (for example, the load time step is 1); and, at the test point, acquiring the rigidity when the loading resultant force is a second preset resultant force value (for example, the loading resultant force is 30N) as the initial rigidity; and determining whether buckling information occurs at the test point according to whether the load time step is retracted. By the method, the information contents such as maximum displacement, initial rigidity and buckling at the test point can be accurately analyzed.
In some embodiments, the obtaining, at the test point, the maximum displacement value when the load time step is a preset time step value includes: through the formula IIDetermining the maximum displacement value d at a load time step of 1 t＝1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein V is t Representing the load time step vector at the test point, V t [-1]Representing the penultimate value of the load time step vector, V t [-2]Representing the penultimate value of the load time step vector; v (V) d Representing displacement vector of test point under local coordinate system, V d [-1]Representing the penultimate value of the displacement vector, V d [-2]Representing the penultimate value of the displacement vector.
At the test point, the obtaining the rigidity when the loading resultant force is the second preset resultant force value (for example, the loading resultant force is 30N) as the initial rigidity may specifically include: through the formula III (V f [n+1]-V f [n])/(V d [n+1]-V d [n]) Determining the rigidity when the loading resultant force is a second preset resultant force value; wherein V is f Representing the resultant force vector loaded at the test point at load time, V f ＝A×V t A represents a first predetermined resultant force value (e.g., 150N); v (V) f [n+1]Is greater than or equal to a second preset resultant force value, and V f [n]Less than a second predetermined resultant force value.
The determining whether buckling occurs at the test point according to whether the load time step is retracted or not may specifically include: judgment of V t Whether or not there is V t [n]Greater than V t [n+1]The method comprises the steps of carrying out a first treatment on the surface of the If V t In the presence of V t [n]Greater than V t [n+1]Then determining buckling at the test point and connecting V t [n]Multiplying a first preset resultant force value (such as 150N) to obtain a force value when buckling occurs at the test point; if V t V in (1) t [n]Are all less than or equal to V t [n+1]And determining that buckling does not occur at the test point.
The specific implementation of each calculation process may be referred to the corresponding description in step 201, and will not be described herein.
And 206, obtaining user scoring information corresponding to the anti-dishing simulation result from a preset storage position.
The user scoring information is information of a user scoring on a dent resistance test of a real part which is the same as or similar to the automobile panel, and different dent resistance simulation results are stored in a preset storage position, namely, the mapping relationship obtained in the step 201.
Step 207, determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result.
The embodiment of the disclosure can realize the association of the anti-dishing simulation result and the subjective evaluation of the user, obtain the anti-dishing analysis result which is closer to the actual feeling of the user, and can embody the satisfaction degree of the user feeling of the test point. According to the automobile panel manufactured by the analysis method, in the actual pressing test of a user, the success rate of meeting the test standard can be improved, the reworking manufacturing condition is reduced, the resource waste can be reduced, and the test cost can be saved. The anti-concave simulation result (maximum displacement, initial rigidity and buckling) can be utilized to directly perform quantitative evaluation on anti-concave subjective feelings of different parts, so that the structural design is improved. The time and cost for changing the design due to the fact that the dent resistance in the later design period is not met are greatly reduced, and the development time is shortened.
Further, as a specific implementation of the method shown in fig. 1 and fig. 2, an embodiment of the disclosure provides an apparatus for analyzing dent resistance, as shown in fig. 6, including: an acquisition module 31 and a determination module 32.
An acquisition module 31 configured to acquire a dent resistance simulation result corresponding to a test point on the automobile panel; and obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position.
The determining module 32 is configured to determine a dishing analysis result corresponding to the test point based on the obtained user scoring information and the dishing simulation result.
In a specific application scenario, the acquisition module 31 is specifically configured to create model data of the automobile panel; selecting the test points from the model data, carrying out grid division on the model data according to the test points, and configuring corresponding simulation parameter information; and performing simulation on the dent resistance of the test point selected from the model data by using an arc length method to obtain a dent resistance simulation result corresponding to the test point.
In a specific application scenario, the obtaining module 31 is specifically further configured to establish a local coordinate system according to the position of the test point on the model data; loading the pressure corresponding to the first preset resultant force value at the position of the test point, and configuring the relevant information of the loading time step and the constraint condition information.
In a specific application scenario, the obtaining module 31 is specifically further configured to obtain, at the test point, a maximum displacement value when the load time step is a preset time step value; and acquiring the rigidity when the loading resultant force is a second preset resultant force value at the test point as initial rigidity; and determining whether buckling information occurs at the test point according to whether the load time step is retracted.
In a specific application scenario, the acquisition module 31 is specifically further configured to pass through the formula Determining the maximum displacement value d at a load time step of 1 t＝1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,,V t representing the load time step vector at the test point, V t [-1]Representing the penultimate value of the load time step vector, V t [-2]Representing the penultimate value of the load time step vector; v (V) d Representing displacement vector of the test point under the local coordinate system, V d [-1]Representing the penultimate value of the displacement vector, V d [-2]Representing the penultimate value of the displacement vector.
In a specific application scenario, the acquisition module 31, in particular also configured to pass through the formula (V f [n+1]-V f [n])/(V d [n+1]-V d [n]) Determining the rigidity when the loading resultant force is a second preset resultant force value; wherein V is f Representing the resultant force vector loaded at the test point at load time, V f ＝A×V t A represents the first preset resultant force value; v (V) f [n+1]Is greater than or equal to the second preset resultant force value, and V f [n]Less than the second predetermined resultant force value.
In a specific application scenario, the obtaining module 31 is specifically further configured to determine V t Whether or not there is V t [n]Greater than V t [n+1]The method comprises the steps of carrying out a first treatment on the surface of the If V t In the presence of V t [n]Greater than V t [n+1]Determining that buckling occurs at the test point, and connecting V t [n]Multiplying the first preset resultant force value to obtain a force value when buckling occurs at the test point; if V t V in (1) t [n]Are all less than or equal to V t [n+1]And determining that buckling does not occur at the test point.
In a specific application scenario, the determining module 32 is further configured to pre-establish a mapping relationship between different user scoring information and corresponding anti-dishing simulation results respectively; and storing the mapping relation in the preset storage position.
In a specific application scenario, the determining module 32 is specifically configured to compare an endpoint value of a maximum displacement value simulation result range corresponding to the first scoring information with an endpoint value of a maximum displacement value simulation result range corresponding to the second scoring information, where the first scoring information and the second scoring information are scoring information of adjacent grades; and adjusting the maximum displacement value simulation result ranges respectively corresponding to the first scoring information and the second scoring information according to the comparison results of the end points of the maximum displacement value simulation result ranges.
In a specific application scenario, the determining module 32 is specifically further configured to compare the end point value of the initial stiffness simulation result range corresponding to the first scoring information with the end point value of the initial stiffness simulation result range corresponding to the second scoring information; and adjusting the initial stiffness simulation result ranges respectively corresponding to the first scoring information and the second scoring information according to the comparison results of the end point values of the initial stiffness simulation result ranges.
It should be noted that, for other corresponding descriptions of each functional unit related to the anti-concavity analysis device provided by the embodiments of the present disclosure, reference may be made to corresponding descriptions in fig. 1 and fig. 2, and details are not repeated herein.
Based on the above-described methods shown in fig. 1 and 2, correspondingly, the embodiments of the present disclosure further provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the above-described methods shown in fig. 1 and 2.
Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.), and includes several instructions for causing a computer device (may be a personal computer, a server, or a network device, etc.) to execute the method of each implementation scenario of the present disclosure.
Based on the methods shown in fig. 1 and fig. 2 and the virtual device embodiment shown in fig. 6, in order to achieve the above objects, the embodiments of the present disclosure further provide an electronic device, which may be configured on a computer side or the like, and the device includes a storage medium and a processor; a storage medium storing a computer program; a processor for executing a computer program to implement the method as shown in fig. 1 and 2 described above.
In some embodiments, the physical device may further include a user interface, a network interface, a camera, radio Frequency (RF) circuitry, sensors, audio circuitry, WI-FI modules, and the like. The user interface may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may include a standard wired interface, a wireless interface (e.g., WI-FI interface), etc. in some embodiments.
It will be appreciated by those skilled in the art that the above-described physical device structure provided by the embodiments of the present disclosure is not limiting of the physical device, and may include more or fewer components, or may combine certain components, or may be a different arrangement of components.
The storage medium may also include an operating system, a network communication module. The operating system is a program that manages the physical device hardware and software resources described above, supporting the execution of information handling programs and other software and/or programs. The network communication module is used for realizing communication among all components in the storage medium and communication with other hardware and software in the information processing entity equipment.
Based on the above electronic device, the embodiment of the disclosure further provides a vehicle, which may specifically include: an apparatus as shown in fig. 6 or an electronic device as described above. The vehicle can be a new energy automobile or a traditional automobile and the like.
From the description of the embodiments disclosed above, it will be apparent to those skilled in the art that the present disclosure may be implemented by means of software plus necessary general hardware platforms, or may be implemented by hardware. By applying the scheme of the embodiment of the disclosure, the correlation between the anti-dishing simulation result and the subjective evaluation of the user can be realized, the anti-dishing analysis result which is closer to the actual feeling of the user can be obtained, and the satisfaction degree of the user feeling of the test point can be reflected. According to the automobile panel manufactured by the analysis method, in the actual pressing test of a user, the success rate of meeting the test standard can be improved, the reworking manufacturing condition is reduced, the resource waste can be reduced, and the test cost can be saved. The anti-concave simulation result (maximum displacement, initial rigidity and buckling) can be utilized to directly perform quantitative evaluation on anti-concave subjective feelings of different parts, so that the structural design is improved. The time and cost for changing the design due to the fact that the dent resistance in the later design period is not met are greatly reduced, and the development time is shortened.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. A method for analyzing dent resistance, comprising:
obtaining a dent resistance simulation result corresponding to a test point on the automobile panel;
obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position;
and determining the anti-dishing analysis result corresponding to the test point based on the obtained user scoring information and the anti-dishing simulation result.
2. The method according to claim 1, wherein the obtaining the dent resistance simulation results corresponding to the test points on the automobile panel comprises:
creating model data of the automobile panel;
selecting the test points from the model data, carrying out grid division on the model data according to the test points, and configuring corresponding simulation parameter information;
and performing simulation on the dent resistance of the test point selected from the model data by using an arc length method to obtain a dent resistance simulation result corresponding to the test point.
3. The method according to claim 2, wherein said configuring the corresponding simulation parameter information comprises:
establishing a local coordinate system according to the position of the test point on the model data;
loading the pressure corresponding to the first preset resultant force value at the position of the test point, and configuring the relevant information of the loading time step and the constraint condition information.
4. The method of claim 3, wherein the performing simulation on the dent resistance of the test point selected on the model data using the arc length method to obtain the dent resistance simulation result corresponding to the test point comprises:
at the test point, obtaining a maximum displacement value when the load time step is a preset time step value; the method comprises the steps of,
at the test point, acquiring the rigidity when the loading resultant force is a second preset resultant force value as initial rigidity; the method comprises the steps of,
and determining whether buckling information occurs at the test point according to whether the load time step is retracted.
5. The method of claim 4, wherein the obtaining, at the test point, the maximum displacement value at which the load time step is a preset time step value comprises:
by the formulaDetermining the maximum displacement value d at a load time step of 1 t＝1 ；
Wherein V is t Representing the load time step vector at the test point, V t [-1]Representing the penultimate value of the load time step vector, V t [-2]Representing the penultimate value of the load time step vector; v (V) d Representing displacement vector of the test point under the local coordinate system, V d [-1]Representing the penultimate value of the displacement vector, V d [-2]Representing the penultimate value of the displacement vector.
6. The method of claim 5, wherein the obtaining, at the test point, the stiffness at which the resultant force is loaded to the second predetermined resultant force value as the initial stiffness comprises:
by the formula (V) f [n+1]-V f [n])/(V d [n+1]-V d [n]) Determining the rigidity when the loading resultant force is a second preset resultant force value;
wherein V is f Representing the resultant force vector loaded at the test point at load time, V f ＝A×V t A represents the first preset resultant force value; v (V) f [n+1]Is greater than or equal to the second preset resultant force value, and V f [n]Less than the second predetermined resultant force value.
7. The method of claim 6, wherein determining whether buckling at the test point occurs based on whether pullback occurred for the load time step comprises:
judgment of V t Whether or not there is V t [n]Greater than V t [n+1]；
If V t In the presence of V t [n]Greater than V t [n+1]Determining that buckling occurs at the test point, and connecting V t [n]Multiplying the first preset resultant force value to obtain a force value when buckling occurs at the test point;
if V t V in (1) t [n]Are all less than or equal to V t [n+1]And determining that buckling does not occur at the test point.
8. The method according to any one of claims 1 to 7, further comprising:
pre-establishing mapping relations between different user scoring information and corresponding anti-dishing simulation results respectively;
and storing the mapping relation in the preset storage position.
9. The method of claim 8, wherein pre-establishing a mapping relationship between different user scoring information and respectively corresponding dent resistance simulation results comprises:
comparing the end point value of the maximum displacement value simulation result range corresponding to the first scoring information with the end point value of the maximum displacement value simulation result range corresponding to the second scoring information, wherein the first scoring information and the second scoring information are scoring information of adjacent grades;
and adjusting the maximum displacement value simulation result ranges respectively corresponding to the first scoring information and the second scoring information according to the comparison results of the end points of the maximum displacement value simulation result ranges.
10. The method of claim 9, wherein the pre-establishing a mapping relationship between different user scoring information and respectively corresponding dent resistance simulation results, further comprises:
comparing the end point value of the initial stiffness simulation result range corresponding to the first scoring information with the end point value of the initial stiffness simulation result range corresponding to the second scoring information;
and adjusting the initial stiffness simulation result ranges respectively corresponding to the first scoring information and the second scoring information according to the comparison results of the end point values of the initial stiffness simulation result ranges.
11. An analysis device for dent resistance, comprising:
the acquisition module is configured to acquire a concave resistance simulation result corresponding to a test point on the automobile panel; obtaining user scoring information corresponding to the anti-dent performance simulation result from a preset storage position, wherein the user scoring information is anti-dent performance test scoring information of a user on a real part which is the same as or similar to the automobile panel, and the user scoring information respectively corresponding to different anti-dent performance simulation results is stored in the preset storage position;
and the determining module is configured to determine the anti-dishing analysis result corresponding to the test point based on the acquired user scoring information and the anti-dishing simulation result.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any one of claims 1 to 10.
13. An electronic device comprising a storage medium, a processor and a computer program stored on the storage medium and executable on the processor, characterized in that the processor implements the method of any one of claims 1 to 10 when executing the computer program.
14. A vehicle, characterized by comprising: the apparatus of claim 11, or the electronic device of claim 13.
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| CN202211663166.2A CN116628835A (en) | 2022-12-23 | 2022-12-23 | Anti-dent analysis method and device, electronic equipment and vehicle |
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| CN202211663166.2A CN116628835A (en) | 2022-12-23 | 2022-12-23 | Anti-dent analysis method and device, electronic equipment and vehicle |
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