CN116628835A - Analytical method, device, electronic equipment and vehicle for dent resistance - Google Patents

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

Analytical method, device, electronic equipment and vehicle for dent resistance

technical field

The present disclosure relates to the technical field of automobile testing, in particular to an analysis method, device, electronic equipment and vehicle for dent resistance.

Background technique

When automobile panels are subjected to static loads such as artificial pressure and snow pressure, and impact dynamic loads such as flying sand and flying stones during driving, they will be dented or even partially deformed, which will greatly affect the appearance and safety of the car. With the development of the automobile industry and the continuous consumption of non-renewable energy, in order to save energy consumption and meet the strict emission standards set by the country, automobile manufacturers have to use thinner steel plates as the outer covering parts of automobiles. The dent resistance of automobile panels is an important basis for evaluating whether the thickness reduction and material substitution of the panels are qualified. Therefore, it is necessary to study the dent resistance of automotive panels.

There is no real car in the early stage of design, so the dent resistance test cannot be carried out. At present, in the analysis method of dent resistance, the model of the automobile panel can be established by the finite element method, and then the dent resistance analysis can be carried out. By comparing with a single standard value, it is determined whether the dent resistance of the loading point is qualified.

However, the automobile panels produced according to this analysis method may not meet the test standards in the user's actual press test, which will easily lead to rework, which not only causes waste of resources, but also increases the test cost.

Contents of the invention

In view of this, the present disclosure provides an analysis method, device, electronic equipment and vehicle for dent resistance. In the press test, it is likely that the test standard cannot be met, which will easily lead to rework, which not only causes waste of resources, but also increases the technical problem of test cost.

In a first aspect, the present disclosure provides a method for analyzing dent resistance, including:

Obtain the dent resistance simulation results corresponding to the test points on the automobile panel;

Acquiring the user score information corresponding to the dent resistance simulation result from a preset storage location, wherein the user score information is the user's score information of the dent resistance test on the real parts that are the same as or similar to the automobile cover , the user rating information corresponding to different anti-concave simulation results is stored in the preset storage location;

Based on the acquired user rating information and the sag resistance simulation result, determine the sag resistance analysis result corresponding to the test point.

In a second aspect, the present disclosure provides a dent resistance analysis device, comprising:

The obtaining module is configured to obtain the simulation results of the anti-dent performance corresponding to the test points on the automobile cover; obtain the user rating information corresponding to the simulation results of the anti-dent performance from the preset storage location, wherein the user rating information For the user's scoring information on the dent resistance test of the real parts that are the same as or similar to the automobile panel, the user scoring information corresponding to different dent resistance simulation results are stored in the preset storage location;

The determination module is configured to determine the dent resistance analysis result corresponding to the test point based on the acquired user rating information and the dent resistance simulation result.

In a third aspect, the present disclosure provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the analysis method for dent resistance described in the first aspect is implemented.

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 operable on the processor, and the first aspect is implemented when the processor executes the computer program The analysis method of the dent resistance.

In a fifth aspect, the present disclosure provides a vehicle, including: the device as described in the second aspect, or the electronic device as described in the fourth aspect.

By virtue of the above technical solutions, the present disclosure provides an analysis method, device, electronic equipment, and vehicle for dent resistance. Compared with the current prior art, the present disclosure can realize the correlation between the anti-dent simulation results and the user's subjective evaluation, and obtain Concave resistance analysis results that are closer to the user's real feelings. Specifically, the anti-dent simulation result corresponding to the test point on the automobile cover can be obtained at first; then the user rating information corresponding to the anti-dent simulation result can be obtained from the preset storage location, wherein the user rating information is the user's comparison with the car. The score information of the dent resistance test of the same or similar real parts of the cover, the user score information corresponding to the different dent resistance simulation results are stored in the preset storage location; then based on the obtained user score information and the dent resistance simulation As a result, the dent resistance analysis results corresponding to the test points are determined. By applying the technical solution of the present disclosure, it is possible to obtain an anti-dent analysis result that is closer to the user's real feeling, and can reflect the satisfaction degree of the user's feeling at the test point. The automobile panel produced according to the analysis method can improve the success rate of meeting the test standard in the user's actual press test, reduce the occurrence of rework, thereby reducing the waste of resources and saving the cost of testing.

The above description is only an overview of the technical solution of the present disclosure. In order to better understand the technical means of the present disclosure, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable , the specific embodiments of the present disclosure are enumerated below.

Description of 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 technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

Fig. 1 shows a schematic flow chart of an analysis method for dent resistance provided by an embodiment of the present disclosure;

Figure 2 shows a schematic flow chart of another analysis method for dent resistance provided by an embodiment of the present disclosure;

Fig. 3 shows a schematic diagram of a grid division structure provided by an embodiment of the present disclosure;

Fig. 4 shows a schematic flow chart of an example of calculating initial stiffness provided by an embodiment of the present disclosure;

Fig. 5 shows a schematic flowchart of an example of judging whether buckling occurs according to an embodiment of the present disclosure;

Fig. 6 shows a schematic structural diagram of a dent resistance analysis device provided by an embodiment of the present disclosure.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

In order to improve the current automobile panels made according to the dent resistance analysis method in the prior art, in the actual pressing test by the user, it is likely that the test standard cannot be met, which will easily lead to rework, which not only causes a waste of resources, but also Technical problems that increase the cost of testing. Embodiments of the present disclosure provide a method for analyzing dent resistance, as shown in FIG. 1 , the method includes:

Step 101 , obtaining simulation results of dent resistance corresponding to test points on the automobile panel.

Automobile panels refer to surfaces or internal parts made of thin metal plates that cover the engine, chassis, cab, and body. They can be divided into external panels, internal panels, and skeleton panels by function and location. Dent resistance refers to the ability of automobile panels to withstand external loads, resist dent deflection and local dent deformation, and maintain shape in the field of automobile manufacturing. The dent resistance of automobile panels is an important basis for evaluating whether the thinning and material substitution of the panels are qualified.

In the embodiment of the present disclosure, a finite element method can be used to establish a model for dent resistance analysis. Through the simulation calculation, the maximum displacement, initial stiffness, buckling and other anti-dent simulation results corresponding to the test points on the automobile panel are obtained. Different from comparing with a single standard value to determine whether the dent resistance of the test point is qualified, the embodiments of the present disclosure can associate the dent resistance simulation results with the user's real feelings, and obtain the dent resistance analysis results that are closer to the user's real feelings. Specifically, the processes shown in steps 102 to 103 can be performed.

Step 102. Obtain user rating information corresponding to the dent resistance simulation result from a preset storage location.

Among them, the user score information is the user's score information on the dent resistance test of the same or similar real parts as the automobile panel, and different dent resistance simulation results are stored in the preset storage location (such as a preset table or database, etc.) Corresponding user rating information.

For example, the dent resistance simulation results may be associated with user subjective evaluations in advance, and user rating information corresponding to different dent resistance simulation results may be saved in a preset table. In the process of specific use, according to the simulation results of the anti-dent performance corresponding to the test points on the current automobile panel, the user rating information corresponding to the simulation results of the anti-dent performance can be obtained from the preset storage location, and the user rating information is User rating information for dent resistance tests on real parts identical or similar to automotive panels. Furthermore, the embodiments of the present disclosure can use the maximum displacement, initial stiffness, and buckling results in the simulation results as evaluation criteria to comprehensively score the user's subjective evaluation of the test point, and reflect in detail the satisfaction degree of the user's experience at this part.

Step 103 , based on the obtained user rating information and sag resistance simulation results, determine the sag resistance analysis results corresponding to the test points.

For example, according to the user rating content corresponding to the dent resistance simulation result of the current test point, it can be directly known whether the automobile panel manufactured according to this standard can meet the test standard in the user's actual pressing test. If the corresponding user score is low, it means that the test point has poor dent resistance. It is not necessary to make a finished product, and corresponding adjustments can be made in advance. Whether the concavity meets the design requirements. If the corresponding user score is higher, it means that the test point has better dent resistance, and the finished product can be produced accordingly.

The embodiments of the present disclosure can realize the correlation between the anti-sag simulation results and the user's subjective evaluation, and obtain the anti-sag analysis results that are closer to the user's real experience, and can reflect the satisfaction degree of the user's experience at the test point. The automobile panel produced according to the analysis method can improve the success rate of meeting the test standard in the user's actual press test, reduce the occurrence of rework, thereby reducing the waste of resources and saving the cost of testing.

Further, as a refinement and extension of the above embodiments, in order to fully describe the specific implementation process of the methods in the embodiments of the present disclosure, the embodiments of the present disclosure provide a specific method as shown in Figure 2, the method includes:

Step 201, establishing in advance the mapping relationship between different user rating information and corresponding corresponding sag resistance simulation results.

For example, for the real parts of different automobile panels, it is necessary to judge the parts that need to be evaluated for dent resistance by professionals in advance. In this area, select points at an interval of 100mm, and use a circular shape with a diameter of 30mm marked with a serial number at the test point. Label the stickers. The evaluation and scoring of users' subjective feelings can be divided into 6 grades, and the relevant description and scoring can be shown in Table 1 below.

Table 1

When pressing, the tester's fingers or palms are required to coincide with the center of the contact part of the test part as much as possible, and the tester's pressing form is not limited. The score of each test point is counted, and the average subjective evaluation score of the test point is obtained after averaging. For example, different testers score the same test point separately, and then calculate the average value of these scores as the average subjective evaluation score of the test point.

As shown in Table 1, the test points are divided into six groups according to the subjective scoring, and the test points in each group can be modeled by the finite element method for anti-dent analysis. Specifically, the arc length method can be used to simulate the dent resistance of the test point. After establishing the model and selecting the test points according to the above method, first perform grid division, establish a circle with a diameter of 25.4mm at the center of the circular patch, and project it onto the surface of the test part along the normal direction of the nearest shell element at the center of the circle. At the same time, the center of the circle is projected to ensure that the coordinates of the grid nodes and the center of the circle are consistent, and the nodes at the center of the circle are set up and named. The divided grid is shown in Figure 3, and the center point in the figure is the center of the circle. Then establish a local coordinate system, take the normal direction of the shell element closest to the center of the circle as the Z axis of the local coordinate system, and establish the local coordinate system with the center of the circle as the origin. The X and Y axes of the local coordinate system are not specified. The purpose of establishing the local coordinate system is to output the maximum displacement of the center of the circle in the local coordinate system in the simulation results for the judgment of anti-concave.

Then load a pressure of 0.2962MPa inward from the vertical loading surface in the circle (for example, the resultant force is 150N). Turn on geometric nonlinearity. Set the analysis method to the arc length method, the initial arc length is 0.1, the maximum arc length is 1, the minimum arc length increment step is 0.05, the maximum arc length increment step is 0.1, and the maximum load ratio coefficient is 1. In order to output the displacement at the center of the circle in the result, it is necessary to set the keyword "*NODE PRINT, NSET=SetName U, COORD", where SetName is the set name of the established node at the center of the circle. Finally, set the constraint conditions, cut off the body 500mm away from the test parts, and constrain the degrees of freedom in the 1-6 direction of the cut-off surface of the body.

After the above parameters are configured, the next step is to calculate and analyze the results:

For reading the load time step vector Vt at the center node: [t1...tn], the displacement vector Vd in the local coordinate system: [d1...dn]. Through calculation, the vector Vf of the resultant force loaded in the circle (for example, the resultant force is 150N) under the load time can be obtained: [f1...fn]. The specific calculation formula is shown in formula 1 below:

V _f ＝150×V _t (Formula 1)

When the arc length method is used to calculate, the final output maximum load time step is greater than 1. In order to obtain the maximum displacement when the load time step is 1, it is necessary to use the difference between the load time step vector and the displacement vector for calculation. The specific calculation formula is as follows:

Among them, V _t represents the load time step vector at the test point, V _t [-1] represents the penultimate value of the load time step vector, V _t [-2] represents the penultimate value of the load time step vector Value; V _d represents the displacement vector of the test point in the local coordinate system, V _d [-1] represents the first last value of the displacement vector, V _d [-2] represents the second last value of the displacement vector .

Calculate the stiffness when the resultant loading force is 30N as the initial stiffness, the calculation process is shown in Figure 4, and a=V _f [n], and b=V _f [n+1], iterate from n=0, in When it is determined that a is less than 30 and b is greater than or equal to 30, the iteration is terminated, and finally the stiffness when the resultant loading force is 30N is determined through the following formula 3;

(V _f [n+1]-V _f [n])/(V _d [n+1]-V _d [n]) (Formula 3)

Among them, V _f represents the resultant force vector loaded at the test point under the load time (as shown in formula 1); V _f [n+1] is greater than or equal to 30, and V _f [n] is less than 30.

Judging whether buckling occurs according to whether the time load step produces retraction, the calculation process is shown in Figure 5, and a=V _t [n], and b=V _t [n+1], iterating from n=0, in the judgment Terminate the iteration when n+1=the vector length of V _t , and specifically judge whether there is V _t [n] greater than V _t [n+1] in V _t ; if V _t [n] in V _t is less than or equal to V _t [n+1], it is determined that buckling occurs at the test point, and multiply V _t [n] by 150 (for example, the resultant force is 150N) to obtain the force value F when buckling occurs at the test point; if there is no V _t in V _t [n] is greater than _Vt [n+1], then it is determined that buckling does not occur at the test point.

According to the above procedures, the maximum displacement, initial stiffness and buckling at the center of the circle can be calculated. If buckling can get the force value when the part buckles. Divide the test points into six groups according to the subjective scoring, and judge whether there is a simulation result that can represent the subjective scoring of each group. If it exists, use the simulation result as the anti-concave analysis standard corresponding to the subjective scoring of this group; Change the initial stiffness to calculate the load, and then refer to the above calculation process to calculate again until the simulation results that can represent the subjective scores of each group are found. In this way, the range of simulation results corresponding to different subjective feelings can be obtained. For the gear that is subjectively felt as buckling, it is only necessary to confirm the buckling force in the simulation results. If there is a buckling force to prove that buckling occurs, otherwise it does not. Finally, after the simulation results corresponding to the test points in each group are counted, there is a corresponding relationship in Table 2 below.

Table 2

D ₁ -D ₂ , D ₃ -D ₄ , ... D ₁₁ -D ₁₂ in Table 2 represent the range of maximum deformation; K ₁ -K ₂ , K ₃ -K ₄ , ... K ₁₁ -K ₁₂ respectively represent The range interval of the initial stiffness.

In some embodiments, step 201 may specifically include: first comparing the endpoint value of the maximum displacement simulation result range corresponding to the first scoring information with the endpoint value of the maximum displacement 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; then according to the comparison result of the endpoint value of the simulation result range of the maximum displacement value, adjust the maximum displacement corresponding to the first scoring information and the second scoring information respectively Value simulation result range.

For example, as shown in Table 2, the scoring range is 1-2 points, and the maximum deformation corresponds to D ₃ -D ₄ ; the scoring range is 3-4 points, and the maximum deformation corresponds to D ₅ -D ₆ . Judging that 1-2 points correspond to the maximum deformation upper limit D ₄ and 3-4 points correspond to the maximum deformation lower limit D ₅ : if D ₄ is less than D ₅ , then the maximum deformation range is adjusted to D ₃ -D ₅ (1-2 points) and D ₅ -D ₆ (3-4 points); if D ₄ is greater than D ₅ , then the maximum deformation range is adjusted to D ₃ -D ₄ (1-2 points) and D ₄ -D ₆ (3-4 points). For example, the scoring range is 1-2 points, the maximum deformation corresponds to the range value of 1-5, and the scoring range is 3-4 points, the maximum deformation corresponds to the range value of 4-10. After comparison and adjustment, the final corresponding relationship is: scoring range 1- 2 points, the maximum deformation corresponds to the range value of 1-5; the scoring range is 3-4 points, the maximum deformation corresponds to the range value of 5-10. Another example is that the scoring range is 1-2 points, the maximum deformation corresponds to the range value of 1-5, and the scoring range is 3-4 points, the maximum deformation corresponds to the range value of 6-10. After comparison and adjustment, the final corresponding relationship is: scoring range 1 -2 points, the maximum deformation corresponds to the range value of 1-6; the scoring range is 3-4 points, the maximum deformation corresponds to the range value of 6-10.

Through the above adjustment method, the judgment standard can be improved, and a better correlation between the anti-sag simulation result (maximum deformation) and the user's subjective evaluation can be achieved, and the anti-sag analysis result that is closer to the user's real feeling can be obtained, which can reflect the user experience of this test point degree of satisfaction.

In some embodiments, step 201 may specifically include: comparing the endpoint value of the initial stiffness simulation result range corresponding to the first scoring information with the endpoint value of the initial stiffness simulation result range corresponding to the second scoring information; and then according to The comparison results of the endpoint values of the initial stiffness simulation result range adjust 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 scoring range is 3-4 points, and the stiffness value corresponds to K ₅ -K ₆ . Judgment 1-2 points correspond to the upper limit of stiffness value K ₄ and 3-4 points correspond to the lower limit of stiffness value K ₅ : if K ₄ is less than K ₅ , the range of stiffness value is adjusted to K ₃ -K ₅ (1-2 points) and K ₅ -K ₆ (3-4 points); if K ₄ is greater than K ₅ , the range of stiffness values is adjusted to K ₃ -K ₄ (1-2 points) and K ₄ -K ₆ (3-4 points). For example, if the scoring range is 1-2 points, the stiffness value corresponds to the range value of 1-7, and the scoring range is 3-4 points, and the stiffness value corresponds to the range value of 6-10. After comparison and adjustment, the final corresponding relationship is: scoring range 1- 2 points, the stiffness value corresponds to the range value of 1-7; the scoring range is 3-4 points, the stiffness value corresponds to the range value of 7-10. Another example is that the scoring range is 1-2 points, the stiffness value corresponds to the range value of 1-3, and the scoring range is 3-4 points, the stiffness value corresponds to the range value of 4-10. After comparison and adjustment, the final corresponding relationship is: scoring range 1 -2 points, the stiffness value corresponds to the range value of 1-4; the scoring range is 3-4 points, the stiffness value corresponds to the range value of 4-10.

Through the above-mentioned adjustment method, the judgment standard can be improved, and a better correlation between the anti-sag simulation result (initial stiffness) and the user's subjective evaluation can be achieved, and the anti-sag analysis result that is closer to the user's real feeling can be obtained, which can reflect the user experience of the test point degree of satisfaction.

The embodiments of the present disclosure are equivalent to providing a simulation analysis method for anti-sag and a method for calculating an evaluation index for anti-sag. By correlating the maximum displacement, initial stiffness, buckling and subjective evaluation scores obtained by the simulation method, a simulation result range for directly obtaining subjective evaluation scores can be obtained, and the dent resistance of different parts can be quickly and quantitatively evaluated through the simulation results. And then improve the structural design. It greatly reduces the time and cost of changing the design due to unsatisfactory dent resistance in the later stage of design, and reduces the development time.

Step 202, saving the mapping relationship between different user scoring information and corresponding corresponding sag resistance simulation results in a preset storage location.

For example, the mapping relationship shown in Table 2 is stored in a preset list or database.

The following content from step 203 to step 207 is to introduce the process of how to use the mapping relationship, that is, analyze the dent resistance of the current automobile panel.

Step 203, creating model data of the automobile panel.

Step 204 , select test points on the model data, perform grid division on the model data of the automobile panel according to the test points, and configure corresponding simulation parameter information.

In some embodiments, configuring 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 at the position of the test point (for example, the resultant force is 150N The pressure is 0.2962MPa), and the relevant information of the load time step and the constraint information are configured.

The specific implementation process can refer to the corresponding description in step 201, and will not be repeated here.

Step 205, using the arc length method to simulate the dent resistance of the test points selected on the model data of the automobile panel, and obtain the dent resistance simulation results corresponding to the test points.

In some embodiments, step 205 may specifically include: at the test point, obtaining the 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, obtaining The stiffness when the resultant loading force is the second preset resultant force value (for example, the resultant loading force is 30N) is taken as the initial stiffness; and, according to whether the load time step produces retraction, determine whether buckling occurs at the test point. In this way, information such as maximum displacement, initial stiffness, and buckling at the test point can be accurately analyzed.

In some embodiments, the above-mentioned at the test point, obtaining the maximum displacement value when the load time step is the preset time step value, includes: through formula 2 Determine the maximum displacement value d _{t = 1} when the load time step is 1; where, V _t represents the load time step vector at the test point, V _t [-1] represents the penultimate value of the load time step vector, V _t [-2] represents the penultimate value of the load time step vector; V _d represents the displacement vector of the test point in the local coordinate system, V _d [-1] represents the penultimate value of the displacement vector, V _d [-2] indicates the second-to-last value of the displacement vector.

At the above-mentioned test point, obtain the stiffness when the resultant loading force is the second preset resultant force value (for example, the resultant loading force is 30N) as the initial stiffness, which may specifically include: through formula 3 (V _f [n+1]-V _f [ n])/(V _d [n+1]-V _d [n]), determine the stiffness when the resultant loading force is the second preset resultant force value; wherein, _Vf represents the resultant force vector loaded at the test point under the load time, V _f =A×V _t , A represents the first preset resultant force value (such as 150N); V _f [n+1] is greater than or equal to the second preset resultant force value, and V _f [n] is less than the second preset resultant force value value.

The information on determining whether buckling occurs at the test point according to whether the load time step produces a retraction above may include: judging whether V _t [n] is greater than V _t [n+1] in V _t ; if there is V _t in V t _t [n] is greater than V _t [n+1], then it is determined that buckling occurs at the test point, and multiply V _t [n] by the first preset resultant force value (such as 150N) to obtain the force value when buckling occurs at the test point ; If V _t [n] in V _t is less than or equal to V _t [n+1], it is determined that buckling does not occur at the test point.

The specific implementation manners of the above calculation processes can be referred to in the corresponding description in step 201, and will not be repeated here.

Step 206, acquiring user score information corresponding to the dent resistance simulation result from a preset storage location.

Among them, the user score information is the user's score information on the dent resistance test of the same or similar real parts as the automobile panel, and the user score information corresponding to different dent resistance simulation results is stored in the preset storage location, that is, through the steps The mapping relationship obtained in 201.

Step 207 , based on the obtained user rating information and sag resistance simulation results, determine the sag resistance analysis results corresponding to the test points.

The embodiments of the present disclosure can realize the correlation between the anti-sag simulation results and the user's subjective evaluation, and obtain the anti-sag analysis results that are closer to the user's real experience, and can reflect the satisfaction degree of the user's experience at the test point. The automobile panel produced according to the analysis method can improve the success rate of meeting the test standard in the user's actual press test, reduce the occurrence of rework, thereby reducing the waste of resources and saving the cost of testing. It is possible to use the simulation results of anti-sag (maximum displacement, initial stiffness, buckling) to directly evaluate the anti-sag subjective feeling of different parts of the anti-sag, and then improve the structural design. It greatly reduces the time and cost of changing the design due to unsatisfactory dent resistance in the later stage of design, and reduces the development time.

Further, as a specific implementation of the methods shown in FIG. 1 and FIG. 2 , an embodiment of the present disclosure provides a device for analyzing anti-denting properties. As shown in FIG. 6 , the device includes: an acquisition module 31 and a determination module 32 .

The obtaining module 31 is configured to obtain the corresponding dent resistance simulation result of the test point on the automobile panel; obtain user score information corresponding to the dent resistance simulation result from a preset storage location, wherein the user score The information is the scoring information of the user on the dent resistance test of the same or similar real parts as the automobile panel, and the user scoring information corresponding to different dent resistance simulation results are stored in the preset storage location.

The determination module 32 is configured to determine the dent resistance analysis result corresponding to the test point based on the acquired user rating information and the dent resistance simulation result.

In a specific application scenario, the acquisition module 31 is specifically configured to create the model data of the automobile panel; select the test points on the model data, and perform grid division on the model data according to the test points , and configuring corresponding simulation parameter information; using the arc length method to simulate the sag resistance of the test point selected on the model data, and obtain the sag resistance simulation result corresponding to the test point.

In a specific application scenario, the acquisition module 31 is specifically configured to establish a local coordinate system according to the position of the test point on the model data; load the first preset resultant force value corresponding to the position of the test point The pressure of the load, and configure the relevant information of the load time step, as well as the constraint information.

In a specific application scenario, the obtaining module 31 is specifically configured to obtain, at the test point, the maximum displacement value when the load time step is a preset time step value; and, at the test point, obtain The stiffness when the resultant loading force is the second preset resultant force value is used as the initial stiffness; and, according to whether a retraction occurs in the loading time step, information on whether buckling occurs at the test point is determined.

In a specific application scenario, the acquisition module 31 is specifically configured to pass the formula Determine the maximum displacement value d _{t = 1} when the load time step is 1; wherein, V _t represents the load time step vector at the test point, and V _t [-1] represents the penultimate value of the load time step vector , V _t [-2] represents the penultimate value of the load time step vector; V _d represents the displacement vector of the test point in the local coordinate system, and V _d [-1] represents the penultimate value of the displacement vector value, V _d [-2] represents the penultimate value of the displacement vector.

In a specific application scenario, the acquisition module 31 is specifically configured to use the formula (V _f [n+1]-V _f [n])/(V _d [n+1]-V _d [n]), Determine the stiffness when the resultant loading force is the second preset resultant force value; wherein, V _f represents the resultant force vector loaded at the test point under the load time, V _f =A×V _t , and A represents the first preset resultant force value ; V _f [n+1] is greater than or equal to the second preset resultant value, and V _f [n] is smaller than the second preset resultant value.

In a specific application scenario, the acquisition module 31 is specifically configured to determine whether V _t [n] is greater than V _t [n+1] in V _t ; if V _t exists in V _t [n] is greater than V _t [ n+1], it is determined that buckling occurs at the test point, and the force value when buckling occurs at the test point is obtained by multiplying V _t [n] by the first preset resultant force value; if V _t in V _t [n] are all less than or equal to V _t [n+1], then it is determined that buckling does not occur at the test point.

In a specific application scenario, the determination module 32 is also configured to pre-establish the mapping relationship between different user rating information and the corresponding corresponding anti-concave simulation results; save the mapping relationship in the preset storage location middle.

In a specific application scenario, the determination module 32 is specifically configured to compare the endpoint value of the maximum displacement value simulation result range corresponding to the first scoring information with the endpoint value of the maximum displacement value simulation result range corresponding to the second scoring information Yes, wherein, the first scoring information and the second scoring information are scoring information of adjacent levels; according to the comparison result of the endpoint value of the simulation result range of the maximum displacement value, adjust the first scoring information and the second scoring information The simulation result range of the maximum displacement value corresponding to the scoring information respectively.

In a specific application scenario, the determination module 32 is specifically configured to use the endpoint value of the initial stiffness simulation result range corresponding to the first scoring information, and the endpoint value of the initial stiffness simulation result range corresponding to the second scoring information Values are compared; according to the comparison result of the endpoint value of the initial stiffness simulation result range, the initial stiffness simulation result ranges corresponding to the first scoring information and the second scoring information are adjusted respectively.

It should be noted that, for other corresponding descriptions of functional units involved in a dent resistance analysis device provided by an embodiment of the present disclosure, reference may be made to the corresponding descriptions in FIG. 1 and FIG. 2 , and details are not repeated here.

Based on the method shown in Figure 1 and Figure 2 above, correspondingly, an embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned process shown in Figure 1 is realized. and the method shown in Figure 2.

Based on this understanding, the technical solution of the present disclosure can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods in various implementation scenarios of the present disclosure.

Based on the method shown in Figure 1 and Figure 2 above, and the embodiment of the virtual device shown in Figure 6, in order to achieve the above purpose, the embodiment of the present disclosure also provides an electronic device, which can be configured on the computer terminal side, etc., the The device includes a storage medium and a processor; the storage medium is used to store a computer program; and the processor is used to execute the computer program to implement the above methods as shown in FIG. 1 and FIG. 2 .

In some embodiments, the above physical device may further include a user interface, a network interface, a camera, a radio frequency (Radio Frequency, RF) circuit, a sensor, an audio circuit, a WI-FI module, and the like. The user interface may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the like, and optional user interfaces may also include a USB interface, a card reader interface, and the like. In some embodiments, the network interface may include a standard wired interface, a wireless interface (such as a WI-FI interface), and the like.

Those skilled in the art can understand that the above-mentioned structure of the physical device provided by the embodiments of the present disclosure does not constitute a limitation to the physical device, and may include more or less components, or combine some components, or arrange different components.

The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the above-mentioned physical devices, and supports the operation of information processing programs and other software and/or programs. The network communication module is used to realize the communication between various components inside the storage medium, and communicate with other hardware and software in the information processing entity device.

Based on the above electronic equipment, an embodiment of the present disclosure further provides a vehicle, which may specifically include: the device as shown in FIG. 6 or the above electronic equipment. Specifically, the vehicle may be a new energy vehicle or a traditional vehicle.

Through the description of the embodiments disclosed above, those skilled in the art can clearly understand that the present disclosure can be implemented by means of software plus a necessary general-purpose hardware platform, or can be implemented by hardware. By applying the solutions of the embodiments of the present disclosure, it is possible to realize the correlation between the anti-sag simulation results and the user's subjective evaluation, obtain the anti-sag analysis results that are closer to the user's real feeling, and can reflect the satisfaction degree of the user's experience at this test point. The automobile panel produced according to the analysis method can improve the success rate of meeting the test standard in the user's actual press test, reduce the occurrence of rework, thereby reducing the waste of resources and saving the cost of testing. It is possible to use the simulation results of anti-sag (maximum displacement, initial stiffness, buckling) to directly evaluate the anti-sag subjective feeling of different parts of the anti-sag, and then improve the structural design. It greatly reduces the time and cost of changing the design due to unsatisfactory dent resistance in the later stage of design, and reduces the development time.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Moreover, the term "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed, Or also include elements inherent in such a process, method, article or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features claimed 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.