A fender support strength calculation and evaluation method

Abstract

The application relates to the technical field of wing board support strength calculation, in particular to a wing board support strength calculation and evaluation method, which comprises the following steps: entering a data collection end, collecting initial data of various wing board supports, and performing selection and summarization on the initial data; inputting the selected and summarized data into a system end, and performing real-time updating on the selected and summarized data; entering a model establishment end, uniformly establishing a plurality of data, obtaining a wing board support strength calculation model, and performing data analysis on the wing board support strength calculation model, so that the wing board support strength calculation model meets a test standard, the structure characteristics of the wing board support are converted into editable mathematical formulas, the stress of the model is calculated by using the fitted mathematical formulas, comparison is performed between the calculation result and a standard result, and it is determined that the wing board support is in a suitable impact-resistant mounting structure under which condition.

Description

Technical Field

[0001] This invention relates to the field of fender support strength calculation technology, and in particular to a method for calculating and evaluating the strength of fender supports. Background Technology

[0002] A fender bracket is an automotive accessory located on the fender at the bottom of the vehicle. It is mainly used to support and stabilize the vehicle, preventing mud or stones kicked up by the tires during rotation from splashing onto other parts of the vehicle, thus avoiding damage or affecting the vehicle's appearance.

[0003] As the supporting structure for the fender, the fender mounting bracket needs to have a certain impact resistance. Moreover, the fender bracket structure of commercial vehicles on the market is a cantilever structure. Since commercial vehicles are driven under harsh conditions and are subjected to long-term impacts from the road surface, if the structural rigidity of the mounting bracket cannot meet the requirements, the fender bracket is very likely to break, causing irreversible damage to the vehicle itself and causing inconvenience to customers.

[0004] Therefore, in the current production process of fender brackets on the market, testing of the fender brackets is required. However, the current market requires overall digital modeling of this product and multiple analysis operations, resulting in a lot of repetitive work and reduced testing efficiency. Moreover, the analysis cycle takes 3-5 working days, which is also inefficient. In addition, from the perspective of the design cycle of the fender bracket, the analysis process of virtual simulation analysts is prone to repetitive work, thus failing to conduct verification analysis quickly and efficiently. Summary of the Invention

[0005] The purpose of this invention is to provide a method for calculating and evaluating the strength of a fender bracket, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for calculating and evaluating the strength of a fender bracket, comprising the following steps:

[0007] Step 1: Enter the data collection terminal, collect the initial data of various fender brackets, filter and summarize the initial data, input the filtered and summarized data into the system terminal, and update the filtered and summarized data in real time.

[0008] Step 2: Enter the model building end, perform unified model building on multiple data to obtain the fender bracket strength calculation model, and perform data analysis on the fender bracket strength calculation model to ensure that the fender bracket strength calculation model meets the test standards.

[0009] Step 3: Enter the strength simulation terminal and test the established fender bracket strength calculation model one by one. During the test, compare the test data with the standard data, and adjust the installation angle and bending state of the bracket in real time during the test to obtain the fender bracket strength data under different conditions.

[0010] The data collection terminal is used to collect initial data of various fender supports, and to filter and summarize the initial data of the fender supports. The filtered and summarized data is then input into the system terminal. The data collection terminal can repeat the above process to update the data of the fender supports in real time.

[0011] The model building end is used to build a model from the collected data, obtain simplified models of the fender bracket under different data states, and analyze and adjust the simplified models of the fender bracket so that the simplified models can meet the test standards.

[0012] The strength simulation terminal is used to test the simplified model, compare the test data with standard data, and thus determine the strength of the fender bracket. During the test, the angle and bending of the fender bracket are adjusted to obtain strength data for different fender brackets.

[0013] Preferably, the data collection terminal includes a structural information module, a performance parameter module, and an installation parameter module;

[0014] The structural information parameter module includes a support attribute unit;

[0015] The bracket property unit is used to record the initial data of the fender bracket strength and the material properties at the current time point in real time using a data logger.

[0016] Preferably, the performance parameter module includes a strength unit and a stiffness unit;

[0017] The strength unit uses a data processor to filter the fender bracket strength in the bracket attribute unit in real time and records it in real time using a data logger.

[0018] The stiffness unit uses a data processor to filter the fender bracket stiffness in the bracket attribute unit in real time and records it in real time using a data logger.

[0019] Preferably, the installation parameter module includes a bracket installation unit and a bracket reduction unit;

[0020] The bracket installation unit detects the bracket's installation angle, parameters, and position status using the collected data;

[0021] The bracket reduction unit reduces the number of brackets after installation to obtain different bracket combination states, and then obtains the installation attribute information of different brackets.

[0022] Preferably, the model building end includes a finite element modeling module and a load acquisition module;

[0023] The finite element modeling module includes a model creation unit and a model modification unit;

[0024] The model building unit is used to receive data on the strength and stiffness of the fender bracket and to build a calculation model for the strength of the fender bracket.

[0025] The model modification unit is used to modify the fender support strength calculation model in real time for different fender support angles, parameters and position states.

[0026] Preferably, the load acquisition module includes a signal acquisition unit;

[0027] The signal acquisition unit is used to acquire the signal of the fender bracket being installed on the vehicle body load, and based on the finite element model, to obtain the load excitation of the fender bracket through a virtual load iteration method.

[0028] Preferably, the strength simulation end includes a stress testing module and a bending benchmarking module;

[0029] The stress test can perform stress tests on the three-dimensional fender support model that has been built in the model building unit.

[0030] The stress testing method is as follows:

[0031] Step 1: Simplify the planar force analysis of the model. The calculation formula is as follows:

[0032] ;

[0033] ;

[0034] Where: M is the stress region, W is the stress area, F is the counterweight, L is the cantilever length, D is the pipe diameter, and d is the wall thickness;

[0035] The above formulas represent the results of plane stress analysis in the root region and plane stress analysis in the region of the simplified model;

[0036] Step 2: Stress analysis of column m at point m, the calculation formula is as follows:

[0037] In the formula:

[0038] ;

[0039] ;

[0040] The above formulas represent the results of point m principal stress analysis and m principal stress analysis;

[0041] in: For external stress, Let M be the edge stress, W be the stress region, F be the stress area, and L be the counterweight.

[0042] ;

[0043] in: The angle is represented by the formula result, which indicates the position factor of the centroid.

[0044] The fender bracket rotation angle is -70°, and the correction factor for the -70° rotation angle is calculated using the following formula:

[0045] ;

[0046] The above is the theoretical calculation process. Through comparative analysis of a large amount of experimental data and simulation data, the result is obtained from the diameter ( ), wall thickness ( ),length( ), counterweight ( The simplified model consisting of four variables is used to calculate the strength at the root location as follows:

[0047] -4.30709 +0.02872 +4.87765 -0.00662 +3.169177 -0.261651 -0.000779 -0.056855 +0.008609 -0.1729525 +0.0018648 +0.02032448 -0.187246 +0.0000057258 -0.001437 ;

[0048] in, The unit is MPa, and it can predict the stress of cantilever structures with pipe diameter of 40-60 mm, cantilever length of 600-1200 mm, and wall thickness of 3-6 mm.

[0049] Preferably, the bending alignment module includes a bending data unit;

[0050] The bending data unit is used to perform correction factor curve fitting on the angle of the bent bracket, and the calculation formula is as follows:

[0051] =6E-13x6+7E-12x5-9E-09x4-2E-08x3+ 4E-05x2-0.0009x+0.7735;

[0052] Repeat the above steps to obtain the remaining three correction factors;

[0053] The formula for calculating the first bend length correction factor is as follows:

[0054] =-3E-11x6+2E-08x5-5E-06x4+0.0007x3-0.0564x2+2.2539x-36.364;

[0055] The formula for calculating the second bending length correction factor is as follows:

[0056] =6E-12x6-7E-09x5+4E-06x4-0.001x3+0.14x2-10.599x+330.21;

[0057] Formula for calculating bending angle correction factor:

[0058] =9E-11x6-7E-08x5+2E-05x4-0.0044x3+0.4425x2-23.554x+521.16;

[0059] The above formula represents the calculation of the bending length correction of the fender bracket. The above formula calculates the bending state results of the fender bracket at various different angles.

[0060] The final mathematical model calculation formula for the mudguard is as follows: ,in To simplify the strength model calculation results ;

[0061] The aforementioned calculation formula can calculate the stiffness and strength of the fender support model. Furthermore, it can fit the fender bending angle state during the calculation process and perform calculations on the fitted data. Therefore, simplified strength model calculation results can be obtained using the above formula. The This is the final data for the fender bracket.

[0062] Preferably, step one: the root of the fender bracket is simplified, so the analysis results of the main stress region of the simplified fender bracket can be obtained, and the stress situation of point m region of the fender bracket can be known based on the obtained results.

[0063] Step 2: Substitute the rotation angle of the fender bracket into the formula to obtain the center of mass position factor of the fender bracket. From the above theoretical calculation process, the simplified model root position strength calculation formula composed of four variables can be obtained.

[0064] Step 3: After obtaining the strength calculation formula for the root position of the simplified model, the correction curve of the bending rotation angle of the fender bracket is fitted to obtain a calculation formula that can be applied to different bending lengths. The final mathematical calculation formula can then be obtained from this formula. ,therefore, The difference between the calculated results and the standard calculation results is the final difference of the fender bracket.

[0065] Compared with the prior art, the beneficial effects of the present invention are:

[0066] 1. This invention can initialize and summarize collected data, and then establish a three-dimensional model of the fender support based on the summarized data. Since the data collection end collects a large amount of data, different models can be established for different data under the action of the model building end. Then, the different models are simplified and analyzed, thereby converting the structural features of the fender support into editable mathematical formulas. The stress of the model is calculated using the fitted mathematical formulas. By comparing the calculation results with the standard results, it can be determined under what conditions the fender support is in a suitable impact-resistant installation structure.

[0067] 2. In this invention, after establishing a model from the collected data, the simplified model can be converted into the same pipe diameter, length and inner wall thickness. Therefore, a unified testing standard is applied to the simplified model. Then, by designing corresponding experiments and integrating internal and external resources, the simulation data and experimental data are compared to verify the simulation results and guide the simulation to obtain more accurate results. Based on the obtained data, relevant personnel can make risk judgments and assessments on the product. Attached Figure Description

[0068] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0069] Figure 1 This is a schematic diagram of the fender strength calculation system architecture of the fender support strength calculation and evaluation method of the present invention;

[0070] Figure 2 This is a schematic diagram of the data collection terminal structure for a fender support strength calculation and evaluation method according to the present invention;

[0071] Figure 3 This is a schematic diagram of the end frame of the model for the fender support strength calculation and evaluation method of the present invention.

[0072] Figure 4 This is a schematic diagram of the strength simulation end frame of the fender support strength calculation and evaluation method of the present invention;

[0073] Figure 5 This is a schematic diagram of the bending of a fender bracket, which is part of the present invention, for calculating and evaluating the strength of a fender bracket.

[0074] Figure 6 This is a schematic diagram of the angle of the fender bracket, which is a method for calculating and evaluating the strength of the bracket according to the present invention.

[0075] Figure 7 This is a data schematic diagram illustrating the method for calculating and evaluating the strength of a fender bracket according to the present invention. Detailed Implementation

[0076] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0077] Please see Figures 1 to 7 The present invention provides a technical solution:

[0078] A strength calculation for a fender bracket includes the following steps:

[0079] Step 1: Enter the data collection terminal, collect the initial data of various fender brackets, filter and summarize the initial data, input the filtered and summarized data into the system terminal, and update the filtered and summarized data in real time.

[0080] Step 2: Enter the model building end, perform unified model building on multiple data to obtain the fender bracket strength calculation model, and perform data analysis on the fender bracket strength calculation model to ensure that the fender bracket strength calculation model meets the test standards.

[0081] Step 3: Enter the strength simulation terminal and test the established fender bracket strength calculation model one by one. During the test, compare the test data with the standard data, and adjust the installation angle and bending state of the bracket in real time during the test to obtain the fender bracket strength data under different conditions.

[0082] The data collection terminal is used to collect initial data of various fender supports, and to filter and summarize the initial data of the fender supports. The filtered and summarized data is then input into the system terminal. The data collection terminal can repeat the above process to update the data of the fender supports in real time.

[0083] The model building end is used to build models from the collected data, obtain simplified models of the fender bracket under different data states, and analyze and adjust the simplified models of the fender bracket to make them meet the test standards.

[0084] The strength simulation end is used to test the simplified model, and the data obtained after the test is compared with the standard data to determine the strength of the fender bracket; during the test, the angle and bending of the fender bracket are adjusted to obtain the strength data of different fender brackets.

[0085] The data collection module includes a structural information module, a performance parameter module, and an installation parameter module;

[0086] The structural information parameter module includes support attribute units;

[0087] The bracket property unit is used to record the initial data of the fender bracket strength and the material properties at the current time point in real time via a data logger.

[0088] The performance parameter module includes strength elements and stiffness elements;

[0089] The strength unit uses a data processor to filter the fender bracket strength in the bracket attribute unit in real time and records it in real time using a data logger;

[0090] The stiffness unit uses a data processor to filter the stiffness of the fender bracket in the bracket attribute unit in real time and records it in real time using a data logger.

[0091] The installation parameter module includes a bracket installation unit and a bracket removal unit;

[0092] The bracket installation unit uses the collected data to detect the bracket's installation angle, parameters, and position status.

[0093] The bracket removal unit removes brackets after installation to obtain different bracket combination states, and then obtains the installation attribute information of different brackets.

[0094] The model creation module includes a finite element modeling module and a load acquisition module;

[0095] The finite element modeling module includes model creation elements and model modification elements;

[0096] The model building unit is used to receive data on the strength and stiffness of the fender bracket and to build a calculation model for the strength of the fender bracket.

[0097] The model modification unit is used to modify the fender support strength calculation model in real time for different fender support angles, parameters and position states.

[0098] The load acquisition module includes a signal acquisition unit;

[0099] The signal acquisition unit is used to acquire the signal of the fender bracket installed on the vehicle body load, and based on the finite element model, to obtain the load excitation of the fender bracket through the virtual load iteration method.

[0100] It can perform initial screening and summarization of collected data, and then establish a three-dimensional model of the fender support based on the screened and summarized data. Since there is a large amount of data collected, different models can be established for different data. Then, the different models are simplified and analyzed, so that the structural characteristics of the fender support can be converted into editable mathematical formulas. The stress of the model is calculated using the fitted mathematical formulas. By comparing the calculation results with the standard results, it can be determined under what conditions the fender support is a suitable impact-resistant installation structure.

[0101] The strength simulation module includes a stress testing module and a bending benchmarking module;

[0102] Stress testing can perform stress tests on the three-dimensional fender support model that has already been built in the model building unit;

[0103] The stress testing method is as follows:

[0104] Step 1: Simplify the planar force analysis of the model. The calculation formula is as follows:

[0105] ;

[0106] ;

[0107] Where: M is the stress region, W is the stress area, F is the counterweight, L is the cantilever length, D is the pipe diameter, and d is the wall thickness;

[0108] The above formulas represent the results of plane stress analysis in the root region and plane stress analysis in the region of the simplified model;

[0109] Step 2: Stress analysis of column m at point m, the calculation formula is as follows:

[0110] In the formula:

[0111] In the formula:

[0112] ;

[0113] ;

[0114] The above formulas represent the results of point m principal stress analysis and m principal stress analysis;

[0115] in: For external stress, Let M be the edge stress, W be the stress region, F be the stress area, and L be the counterweight.

[0116] ;

[0117] in: The angle is represented by the formula result, which indicates the position factor of the centroid.

[0118] The fender bracket rotation angle is -70°. The formula for calculating the correction factor for the -70° rotation angle is as follows:

[0119] ;

[0120] The above is the theoretical calculation process. Through comparative analysis of a large amount of experimental data and simulation data, the result is obtained from the diameter ( ), wall thickness ( ),length( ), counterweight ( The simplified model consisting of four variables is used to calculate the strength at the root location as follows:

[0121] -4.30709 +0.02872 +4.87765 -0.00662 +3.169177 -0.261651 -0.000779 -0.056855 +0.008609 -0.1729525 +0.0018648 +0.02032448 -0.187246 +0.0000057258 -0.001437 ;

[0122] in, The unit is MPa, and it can predict the stress of cantilever structures with pipe diameter of 40-60 mm, cantilever length of 600-1200 mm, and wall thickness of 3-6 mm.

[0123] The bending alignment module includes bending data units;

[0124] The bending data unit is used to perform correction factor curve fitting on the angle of the bent bracket, and the calculation formula is as follows:

[0125] =6E-13x6+7E-12x5-9E-09x4-2E-08x3+ 4E-05x2-0.0009x+0.7735;

[0126] Repeat the above steps to obtain the remaining three correction factors;

[0127] The formula for calculating the first bend length correction factor is as follows:

[0128] =-3E-11x6+2E-08x5-5E-06x4+0.0007x3-0.0564x2+2.2539x-36.364;

[0129] The formula for calculating the second bending length correction factor is as follows:

[0130] =6E-12x6-7E-09x5+4E-06x4-0.001x3+0.14x2-10.599x+330.21;

[0131] Formula for calculating bending angle correction factor:

[0132] =9E-11x6-7E-08x5+2E-05x4-0.0044x3+0.4425x2-23.554x+521.16;

[0133] The above formula represents the calculation of the bending length correction of the fender bracket. The above formula calculates the bending state of the fender bracket at various angles.

[0134] The final mathematical model calculation formula for the mudguard is as follows: ,in To simplify the strength model calculation results ;

[0135] The above calculation formula can calculate the stiffness and strength of the fender support model. Furthermore, it can fit the fender bending angle state during the calculation process and perform calculations on the fitted data. Therefore, simplified strength model calculation results can be obtained using the above formula. , This is the final data for the fender bracket.

[0136] After building a model from the collected data, the simplified model can be converted into the same pipe diameter, length and inner wall thickness. Therefore, a unified testing standard is applied to the simplified model. Then, by designing corresponding experiments and integrating internal and external resources, the simulation data and experimental data are compared to verify the simulation results and guide the simulation to obtain more accurate results. Based on the obtained data, relevant personnel can make risk judgments and assessments on the product.

[0137] A method for calculating and evaluating the strength of a fender bracket includes the following steps:

[0138] Step 1: The root of the fender support is simplified, thus the analysis results of the principal stress region of the simplified fender support can be obtained. Therefore, based on the obtained results, the stress situation of point m region of the fender support can be known.

[0139] Step 2: Substitute the rotation angle of the fender bracket into the formula to obtain the center of mass position factor of the fender bracket. From the above theoretical calculation process, the simplified model root position strength calculation formula composed of four variables can be obtained.

[0140] Step 3: After obtaining the strength calculation formula for the root position of the simplified model, the correction curve of the bending rotation angle of the fender bracket is fitted to obtain a calculation formula that can be applied to different bending lengths. The final mathematical calculation formula can then be obtained from this formula. ,therefore, The difference between the calculated results and the standard calculation results is the final difference of the fender bracket.

[0141] This invention provides a method for calculating and evaluating the strength of a fender support. During the strength calculation, the initial data of the fender support's properties are collected in real-time via a data collection terminal, and the properties are updated in real-time. Furthermore, the data collection terminal enables real-time updates of the fender support's strength and stiffness, allowing for the collection and updating of necessary experimental data. This allows for the unified input of required sample data into the system, reducing the need for personnel to search for data when conducting experiments on different fender supports, thus addressing the issue of low efficiency. The model building terminal can initialize models based on different fender support data, and during the model building process, adjustments can be made based on changes in model data. The model can also be updated in real-time. The system establishes and records data, and after model creation, it can connect the model with existing loads to obtain the overall model to be tested. This reduces repetitive work for relevant personnel and allows for real-time structural adjustments to the model during its creation, preventing inaccurate test data. The stress testing and bending calibration modules in the strength model module enable testing of the initial model. During testing, only adjustments to the model data are needed to switch to a different model, significantly improving testing efficiency and reducing repetitive tasks. Furthermore, real-time recording of test data effectively prevents data errors.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fender support strength calculation method characterized by: Includes the following steps: Step 1: Enter the data collection terminal, collect the initial data of various fender brackets, filter and summarize the initial data, input the filtered and summarized data into the system terminal, and update the filtered and summarized data in real time. Step 2: Enter the model building end, perform unified model building on multiple data to obtain the fender bracket strength calculation model, and perform data analysis on the fender bracket strength calculation model to ensure that the fender bracket strength calculation model meets the test standards. Step 3: Enter the strength simulation terminal and test the established fender bracket strength calculation model one by one. During the test, compare the test data with the standard data, and adjust the installation angle and bending state of the bracket in real time during the test to obtain the fender bracket strength data under different conditions. The data collection terminal is used to collect initial data of various fender supports, and to filter and summarize the initial data of the fender supports. The filtered and summarized data is then input into the system terminal. The data collection terminal can repeat the above process to update the data of the fender supports in real time. The model building end is used to build a model from the collected data, obtain simplified models of the fender bracket under different data states, and analyze and adjust the simplified models of the fender bracket so that the simplified models can meet the test standards. The strength simulation terminal is used to test the simplified model, and the data obtained after the test is compared with the standard data to determine the strength of the fender bracket. During the testing process, the angle and bending of the fender bracket were adjusted to obtain strength data for different fender brackets. The strength simulation terminal includes a stress testing module and a bending calibration module; The stress test can perform stress tests on the three-dimensional fender support model that has been built in the model building unit. The stress testing method is as follows: Step 1: Simplify the planar force analysis of the model. The calculation formula is as follows: ； ； Where: M is the stress region, W is the stress area, F is the counterweight, L is the cantilever length, D is the pipe diameter, and d is the wall thickness; The above formulas represent the results of plane stress analysis in the root region and plane stress analysis in the region of the simplified model; Step 2: Stress analysis of column m at point m, the calculation formula is as follows: ； In the formula: ； ； The above formulas represent the results of the point m principal stress analysis and the m principal stress analysis; wherein: is the outer stress, is the edge stress, M is the stress area, W is the stress area, F is the weight, L is the cantilever length; ； in: The angle is represented by the formula result, which indicates the position factor of the centroid. The fender bracket rotation angle is -70°, and the correction factor for the -70° rotation angle is calculated using the following formula: ； The above is the theoretical calculation process. Through comparative analysis of a large amount of experimental data and simulation data, the result is obtained from the diameter ( ), wall thickness ( ),length( ), counterweight ( The simplified model consisting of four variables is used to calculate the strength at the root location as follows: -4.30709+0.02872 +4.87765 -0.00662 +3.169177 -0.261651 -0.000779 -0.056855 +0.008609 -0.1729525 +0.0018648 +0.02032448 -0.187246 +0.0000057258 -0.001437 ； in, The unit is MPa, and it can predict the stress of cantilever structures with pipe diameter of 40-60 mm, cantilever length of 600-1200 mm, and wall thickness of 3-6 mm. The bending alignment module includes a bending data unit; The bending data unit is used to perform correction factor curve fitting on the angle of the bent bracket, and the calculation formula is as follows: = 6E-13x6+ 7E-12x5- 9E-09x4- 2E-08x3+ 4E-05x2- 0.0009x + 0.7735; Repeat the above steps to obtain the remaining three correction factors; The formula for calculating the first bend length correction factor is as follows: = -3E-11x6 + 2E-08x5 - 5E-06x4 + 0.0007x3 - 0.0564x2 + 2.2539x - 36.364; The formula for calculating the second bending length correction factor is as follows: =6E-12x6-7E-09x5+4E-06x4-0.001x3+0.14x2-10.599x+330.21; Formula for calculating bending angle correction factor: = 9E-11x6 - 7E-08x5 + 2E-05x4 - 0.0044x3 + 0.4425x2 - 23.554x + 521.16; The above formula represents the calculation of the bending length correction of the fender bracket. The above formula calculates the bending state results of the fender bracket at various different angles. The final fender mathematical model calculation formula is wherein to simplify the strength model calculation result ; The aforementioned calculation formula can calculate the stiffness and strength of the fender support model. Furthermore, it can fit the fender bending angle state during the calculation process and perform calculations on the fitted data. Therefore, simplified strength model calculation results can be obtained using the above formula. The This is the final data for the fender bracket.

2. The fender support strength calculation method according to claim 1, characterized by: The data collection terminal includes a structural information module, a performance parameter module, and an installation parameter module; The structural information parameter module includes a support attribute unit; The bracket property unit is used to record the initial data of the fender bracket strength and the material properties at the current time point in real time using a data logger.

3. The fender support strength calculation method according to claim 2, characterized by: The performance parameter module includes strength units and stiffness units; The strength unit uses a data processor to filter the fender bracket strength in the bracket attribute unit in real time and records it in real time using a data logger. The stiffness unit uses a data processor to filter the fender bracket stiffness in the bracket attribute unit in real time and records it in real time using a data logger.

4. The fender support strength calculation method according to claim 2, characterized by: The installation parameter module includes a bracket installation unit and a bracket reduction unit; The bracket installation unit detects the bracket's installation angle, parameters, and position status using the collected data; The bracket reduction unit reduces the number of brackets after installation to obtain different bracket combination states, and then obtains the installation attribute information of different brackets.

5. The fender support strength calculation method of claim 1, wherein: The model creation module includes a finite element modeling module and a load acquisition module; The finite element modeling module includes a model creation unit and a model modification unit; The model building unit is used to receive data on the strength and stiffness of the fender bracket and to build a calculation model for the strength of the fender bracket. The model modification unit is used to modify the fender support strength calculation model in real time for different fender support angles, parameters and position states.

6. The fender support strength calculation method according to claim 5, characterized by: The load acquisition module includes a signal acquisition unit; The signal acquisition unit is used to acquire the signal of the fender bracket being installed on the vehicle body load, and based on the finite element model, to obtain the load excitation of the fender bracket through a virtual load iteration method.

7. A fender support strength evaluation method, referring to any one of the fender strength calculation methods of claims 1-6, characterized in that: Includes the following steps: Step 1: The root of the fender bracket is simplified, thus the analysis results of the principal stress region of the simplified fender bracket can be obtained. Therefore, based on the obtained results, the stress situation of point m region of the fender bracket can be known. Step 2: Substitute the rotation angle of the fender bracket into the formula to obtain the center of mass position factor of the fender bracket. From the above theoretical calculation process, the simplified model root position strength calculation formula composed of four variables can be obtained. Step 3: After obtaining the strength calculation formula for the root position of the simplified model, the correction curve of the bending rotation angle of the fender bracket is fitted to obtain a calculation formula that can be applied to different bending lengths. The final mathematical calculation formula can then be derived from this formula. ,therefore, The difference between the calculated results and the standard calculation results is the final difference of the fender bracket.

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