Bench test method, device, equipment and storage medium for automobile accessory structural parts

Abstract

This application relates to the field of vehicle testing technology and discloses a bench test method, apparatus, equipment, and storage medium for automotive accessory components. The method comprises: constructing a finite element model of the automotive accessory component; determining a fatigue life value of the automotive accessory component based on the finite element model; determining a target load signal based on the fatigue life value of the automotive accessory component; and performing a bench test of the automotive accessory component based on the target load signal. This application can effectively improve the accuracy of bench testing of automotive accessory components.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a bench test method, device, equipment and storage medium for automobile accessory structural parts. Background Art

[0002] Many accessory components on a vehicle are primarily subjected to vibration and durability loads from road impact during driving. If these components exhibit strength and durability issues after market launch, they can significantly impact the vehicle's reputation. Therefore, during the vehicle's R&D phase, extensive full-vehicle road testing is conducted to verify these components and prevent market issues. However, full-vehicle road testing is time-consuming and costly, so rapid test bench verification of these components, ensuring their strength is equivalent to full-vehicle road testing, is crucial. These accessory components are typically subjected to significant load excitation in one direction, while loads in other directions are negligible. Therefore, they are typically verified using a bench-based durability test bench. Current bench-based durability test loads for accessory components are primarily based on historical operating conditions, which are inconsistent with the strengths tested in full-vehicle road testing. This leads to issues such as over-validation, under-validation, or failure locations that are completely inconsistent with full-vehicle testing, resulting in poor accuracy in bench testing of accessory components.

[0003] Therefore, how to effectively improve the accuracy of bench testing of automotive accessory structural parts is a problem that needs to be solved urgently.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of this application is to provide a bench test method, device, equipment and storage medium for automobile accessory structural parts, aiming to solve the technical problem of how to effectively improve the accuracy of bench testing of automobile accessory structural parts.

[0006] To achieve the above objectives, the present application proposes a bench test method for automobile accessory structural parts, the method comprising:

[0007] Construct finite element models of automotive accessory components;

[0008] Determining a fatigue life value of an automobile accessory structural component based on the finite element model;

[0009] Determine the target load signal based on the fatigue life value of the automotive accessory structural parts;

[0010] A bench test of an automobile accessory structural component is performed according to the target load signal.

[0011] In one embodiment, determining the fatigue life value of the automobile accessory structural component based on the finite element model includes:

[0012] generating a stress spectrum density function of an automobile accessory structural component based on the finite element model;

[0013] The fatigue life value of the automobile accessory structural component is determined based on the stress spectrum density function of the automobile accessory structural component.

[0014] In one embodiment, determining the fatigue life value of the automobile accessory structural component based on the stress spectrum density function of the automobile accessory structural component includes:

[0015] Collect acceleration signals of automotive accessory components under vehicle road durability test conditions;

[0016] Converting the acceleration signal into an acceleration power spectrum density signal;

[0017] Obtain fatigue life curves of automotive accessory components;

[0018] The fatigue life value of the automobile accessory structural component is determined based on the stress spectrum density function of the automobile accessory structural component, the acceleration power spectrum density signal, and the fatigue life curve.

[0019] In one embodiment, determining the target load signal based on the fatigue life value of the automobile accessory structural component includes:

[0020] Obtaining a target fatigue life value from the fatigue life values ​​of the automobile accessory structural component;

[0021] determining a parameter range of a load signal based on the target fatigue life value;

[0022] A target load signal is determined according to the parameter range of the load signal.

[0023] In one embodiment, determining the parameter range of the load signal based on the target fatigue life value includes:

[0024] Perform uniaxial vibration tests on automotive accessory components using preset load information to obtain reference fatigue life values;

[0025] Comparing the reference fatigue life value with the target fatigue life value to obtain a comparison result;

[0026] When the comparison results are consistent, calculation is performed based on the reference fatigue life value to obtain a constraint function of the load signal;

[0027] A parameter range of the load signal is determined based on the constraint function of the load signal.

[0028] In one embodiment, determining the target load signal according to the parameter range of the load signal includes:

[0029] Determining an individual set according to a parameter range of the load signal;

[0030] Perform hierarchical sorting based on the individual set to obtain multi-layer individuals;

[0031] Calculating the crowding degree value of each individual in the multi-layer individuals to obtain the crowding degree value of each layer of individuals;

[0032] A target load signal is determined based on the crowding degree values ​​of the individuals in each layer.

[0033] In one embodiment, determining the target load signal based on the congestion values ​​of the individuals on each layer includes:

[0034] Generate a first set according to the crowding degree values ​​of the individuals in each layer;

[0035] Perform a crossover operation based on the individuals in the first set to generate a second set;

[0036] A new individual set is generated based on the first set and the second set, and the step of performing hierarchical sorting based on the individual set to obtain multiple layers of individuals is performed until an iteration termination condition is met to obtain a target load signal.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes a bench test device for automobile accessory structural parts, the bench test device for automobile accessory structural parts comprising:

[0038] Construction module, used to build finite element models of automotive accessory structural parts;

[0039] A determination module, configured to determine a fatigue life value of an automobile accessory structural component based on the finite element model;

[0040] The determination module is further configured to determine a target load signal based on a fatigue life value of an automobile accessory structural component;

[0041] The test module is used to perform a bench test on the automobile accessory structural part according to the target load signal.

[0042] In addition, to achieve the above-mentioned purpose, the present application also proposes a bench test equipment for automobile accessory structural parts, which includes: a memory, a processor, and a computer program stored on the memory and runnable on the processor, and the computer program is configured to implement the steps of the bench test method for automobile accessory structural parts as described above.

[0043] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the bench test method for automobile accessory structural parts as described above are implemented.

[0044] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the bench test method for automobile accessory structural parts as described above.

[0045] The present application provides a bench test method for automobile accessory structural parts. The present application can quickly and effectively determine the fatigue life value of the automobile accessory structural parts by first constructing a finite element model of the automobile accessory structural parts; determine the fatigue life value of the automobile accessory structural parts based on the finite element model, thereby improving the accuracy of the fatigue life value; determine a target load signal based on the fatigue life value of the automobile accessory structural parts, thereby improving the efficiency of load signal determination; and perform a bench test on the automobile accessory structural parts according to the target load signal, thereby effectively improving the accuracy of the bench test of the automobile accessory structural parts.

[0046] In summary, the present application determines the fatigue life value of automobile accessory structural parts by constructing a finite element model, thereby determining the target load signal and conducting bench tests on automobile accessory structural parts. The target load signal determined by the finite element model can realize rapid and accurate bench tests, overcoming the technical defects that lead to poor accuracy of bench tests on automobile accessory structural parts, and can effectively improve the accuracy of bench tests on automobile accessory structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 A flow chart of the first embodiment of the bench test method for automobile accessory structural parts of the present application is provided;

[0050] Figure 2 A flow chart of the second embodiment of the bench test method for automobile accessory structural parts of the present application is provided;

[0051] Figure 3A diagram showing a curve showing the relationship between load signal values ​​and frequency values ​​for a bench test method for an automotive accessory structural component provided in Example 2 of the present application;

[0052] Figure 4 This is a schematic diagram of the module structure of a bench test device for automotive accessory structural parts according to an embodiment of the present application;

[0053] Figure 5 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the bench test method for automobile accessory structural parts in the embodiment of the present application.

[0054] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0056] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0057] The main solution of the embodiment of the present application is: constructing a finite element model of an automobile accessory structural part; determining the fatigue life value of the automobile accessory structural part based on the finite element model; determining a target load signal based on the fatigue life value of the automobile accessory structural part; and performing a bench test of the automobile accessory structural part according to the target load signal.

[0058] Current bench durability test loads for automotive accessory components are primarily based on historical experience and are inconsistent with the strength of full vehicle road tests. This can lead to issues such as over-validation, under-validation, or failure locations that are completely inconsistent with full vehicle tests. This results in poor bench test accuracy for automotive accessory components. Therefore, effectively improving the accuracy of bench tests for automotive accessory components is a pressing issue.

[0059] This application determines the fatigue life value of automobile accessory structural parts by constructing a finite element model, thereby determining the target load signal and conducting bench tests on the automobile accessory structural parts. The target load signal determined by the finite element model can realize rapid and accurate bench testing, overcoming the technical defects that lead to poor accuracy of bench testing of automobile accessory structural parts, and can effectively improve the accuracy of bench testing of automobile accessory structural parts.

[0060] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of performing the above functions, a bench test device for automotive accessory components, etc. Below, this embodiment and the following embodiments are described using a bench test device for automotive accessory components as an example.

[0061] Based on this, the embodiment of the present application provides a bench test method for automobile accessory structural parts, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the bench test method for automobile accessory structural parts of the present application.

[0062] In this embodiment, the bench test method for automobile accessory structural parts includes steps S10 to S40:

[0063] Step S10, constructing a finite element model of the automobile accessory structural part;

[0064] It should be noted that automobile accessory structural parts refer to various accessories and structural components on the automobile. The automobile is composed of many accessory structural parts assemblies, such as the front end frame, fuel tank, body accessory bracket, electrical accessory bracket, compressor, power battery pack, etc. This embodiment does not impose specific restrictions on this.

[0065] Understandably, automotive accessory components are subject to various stresses and loads during vehicle operation, necessitating bench testing to verify their performance and reliability. Finite element modeling is an analytical tool that mathematically simulates the forces acting on real objects. It can simplify complex structures into models composed of a finite number of elements, enabling various mechanical analyses and calculations. Therefore, constructing finite element models of automotive accessory components is a prerequisite and foundation for bench testing.

[0066] Step S20, determining a fatigue life value of an automobile accessory structural component based on the finite element model;

[0067] It's important to note that fatigue life refers to the number of cycles a material or structure undergoes from initial damage to ultimate failure under cyclic loading. Fatigue life is a crucial metric in bench testing of automotive accessory components, reflecting their ability to resist fatigue damage during long-term use. Finite element model-based analysis and calculations can determine the fatigue life of automotive accessory components under varying loads, providing a basis for subsequent bench testing.

[0068] In a feasible implementation, step S20 may include: generating a stress spectrum density function of the automobile accessory structural component based on the finite element model; and determining a fatigue life value of the automobile accessory structural component based on the stress spectrum density function of the automobile accessory structural component.

[0069] It should be noted that the n-stage modal values ​​of the automobile accessory structural parts are calculated based on the finite element model of the automobile accessory structural parts, including: f1 (first-order modal value), ..., f n (nth-order modal value), thereby determining the fixed points of the automotive accessory structural component and inputting a swept frequency excitation signal at these fixed points, outputting the stress spectrum density function of the automotive accessory structural component. The stress spectrum density function can reflect the stress distribution of the structural component at different frequencies and amplitudes. Through further analysis, key parameters such as maximum stress, mean stress, and stress amplitude can be extracted from the stress spectrum density function to evaluate the fatigue life of the automotive accessory structural component.

[0070] It can be understood that by generating the stress spectrum density function of the automotive accessory structural parts, the stress conditions of the structural parts in the actual working environment can be simulated more accurately, thereby obtaining more reliable fatigue life prediction results.

[0071] In a feasible embodiment, determining the fatigue life value of the automobile accessory structural part based on the stress spectrum density function of the automobile accessory structural part includes: collecting the acceleration signal of the automobile accessory structural part under the whole vehicle road durability test condition; converting the acceleration signal into an acceleration power spectrum density signal; obtaining the fatigue life curve of the automobile accessory structural part; and determining the fatigue life value of the automobile accessory structural part based on the stress spectrum density function of the automobile accessory structural part, the acceleration power spectrum density signal and the fatigue life curve.

[0072] It should be noted that accelerometers are placed at the fixing points of automotive accessory components to collect acceleration signals from these components during vehicle road durability tests. These signals are then converted into acceleration power spectrum density signals. This signal reflects the vibration of the components at different frequencies, providing data support for subsequent fatigue life analysis.

[0073] It's understood that a fatigue life curve, also known as a SN fatigue life curve, also known as a stress-life curve, describes the fatigue life of a material or structure at different stress levels. This curve is typically derived from test data and used to predict the fatigue life of a structural component at a given stress level. By combining the stress spectral density function, acceleration power spectral density signal, and SN fatigue life curve of automotive accessory components, the fatigue life of these components can be more accurately determined.

[0074] It is worth noting that by combining the acquired acceleration power spectrum density signal, the stress spectrum density function of the automobile accessory structural parts, the total duration of the vehicle road durability test conditions and the SN fatigue life curve of the automobile accessory structural parts, and calculating according to the vibration fatigue theory, the fatigue life value of the automobile accessory structural parts under the vehicle road durability test conditions is obtained.

[0075] Step S30, determining a target load signal based on the fatigue life value of the automobile accessory structural component;

[0076] It should be noted that the target load signal refers to the load signal applied to the automotive accessory structure during bench testing. Based on the fatigue life value of the automotive accessory structure, the load magnitude and frequency it is subjected to during different time periods can be determined, thereby generating the target load signal. This allows the automotive accessory structure to be loaded according to the target load signal during bench testing, simulating the stress conditions experienced during actual use.

[0077] Step S40: performing a bench test on the automobile accessory structural component according to the target load signal.

[0078] It should be noted that bench testing involves simulated loading tests on automotive accessory components in a laboratory environment to evaluate their performance and reliability. The target load signal determined by the finite element model can more accurately simulate the load conditions experienced in actual vehicle use, thereby improving the accuracy of bench testing.

[0079] It's understandable that bench testing of automotive accessory components based on the determined target load signal verifies their performance and reliability in actual use. Bench testing simulates the complex operating conditions to which automotive accessory components are subjected during real-world road use, enabling comprehensive testing and evaluation of their structure and performance. Furthermore, because the target load signal is determined based on a finite element model, it overcomes the technical drawback of previously developed bench test loads based on historical experience, resulting in more accurate and reliable bench test results.

[0080] The present embodiment provides a bench test method for automobile accessory structural parts. The present embodiment can quickly and effectively determine the fatigue life value of the automobile accessory structural parts by first constructing a finite element model of the automobile accessory structural parts; determine the fatigue life value of the automobile accessory structural parts based on the finite element model, thereby improving the accuracy of the fatigue life value; determine a target load signal based on the fatigue life value of the automobile accessory structural parts, thereby improving the efficiency of load signal determination; and perform a bench test on the automobile accessory structural parts according to the target load signal, thereby effectively improving the accuracy of the bench test of the automobile accessory structural parts.

[0081] In summary, this embodiment determines the fatigue life value of the automobile accessory structural parts by constructing a finite element model, thereby determining the target load signal and conducting a bench test on the automobile accessory structural parts. The target load signal determined by the finite element model can realize a quick and accurate bench test, overcoming the technical defects that lead to poor accuracy of the bench test of the automobile accessory structural parts, and can effectively improve the accuracy of the bench test of the automobile accessory structural parts.

[0082] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 2 , the step S30 further includes steps S301-S303:

[0083] Step S301: obtaining a target fatigue life value among the fatigue life values ​​of the automobile accessory structural component.

[0084] It should be noted that for the fatigue life values ​​of automobile accessory structural parts under the whole vehicle road durability test conditions, the top three lowest life values ​​are taken: L1_road (the first lowest life value), L2_road (the second lowest life value), and L3_road (the third lowest life value), which are the target fatigue life values.

[0085] Step S302: determining a parameter range of a load signal based on the target fatigue life value.

[0086] It should be noted that the target fatigue life values ​​L1_road, L2_road, and L3_road can be used to determine the parameter range of the load signal, including load amplitude, load frequency, and number of load cycles. These parameter ranges can be determined by comprehensively considering factors such as the material properties and structural characteristics of automotive accessory components, as well as the fatigue life values, to ensure that the bench test can simulate realistic fatigue damage conditions.

[0087] In a feasible embodiment, step 302 may include: determining the parameter range of the load signal based on the target fatigue life value, including: performing a uniaxial vibration test on the automotive accessory structural part through preset load information to obtain a reference fatigue life value; comparing the reference fatigue life value with the target fatigue life value to obtain a comparison result; when the comparison result is consistent, performing calculation according to the reference fatigue life value to obtain a constraint function of the load signal; and determining the parameter range of the load signal based on the constraint function of the load signal.

[0088] It should be noted that the fixing point of the automobile accessory structure is fixed on the uniaxial vibration test bench, and the load signal of the bench test on the automobile accessory structure is set to A(f), where A is the load signal value, f is the frequency value, and the relationship between A and f is a broken line relationship in the double logarithmic coordinate system.

[0089] like Figure 3 As shown, Figure 3 The diagram of the relationship between the load signal value and the frequency value is shown in the figure. The vertical axis A is the load signal value, and the horizontal axis f is the frequency value. A and f are in a broken line relationship in the double logarithmic coordinate system. f min 、f max are self-defined constant parameters, f1, ..., f n The n-stage modal value of the automobile accessory structure is set, and the number of turning points on the A(f) function line is set to n. The A(f) function is composed of the parameter A min , A1, …, A i ,…,A n 、A max constitute.

[0090] It can be understood that, if the automobile accessory structure is subjected to the load signal A(f) of the bench test and vibrates for t hours, if the top three values ​​of the automobile accessory structure's life value on the uniaxial vibration test bench are consistent with the vehicle road durability test conditions, then the parameter A of the load signal A(f) function can be solved. min , A1, …, A i ,…,A n 、A max The constraint functions f1, f2, f3 are used to solve the parameter A of the given A(f) function. min , A1, …, A i ,…,A n 、A max The range is as follows:

[0091]

[0092]

[0093]

[0094] A min ∈[A min -min, A min -max] (Equation 4)

[0095] A1∈[A1-min,A1-max] (Equation 5)

[0096] A i ∈[A i-min, A i -max] (Equation 6)

[0097] A n ∈[A n -min, A n -max] (Equation 7)

[0098] A max ∈[A max -min, A max -max]

[0099] (Equation 8)

[0100] In equations 1 to 8, L1_bench, L2_bench, and L2_bench represent the first, second, and third lowest life values ​​of the vehicle accessory structural component obtained by the load signal A(f) of the bench test on the uniaxial vibration test bench, respectively. L1_road, L2_road, and L3_road represent the first, second, and third lowest fatigue life values ​​of the vehicle accessory structural component under the vehicle road durability test conditions. A min -min, A min -max, A1-min, A1-max, A i -min, A i -max, A n -min, A n -max, A max -min, A max -max represent the parameter A of the A(f) function min , A1, …, A i ,…,A n 、A max The minimum and maximum values ​​of .

[0101] Step S303: determining a target load signal according to the parameter range of the load signal.

[0102] It should be noted that within the defined load signal parameter range, a target load signal that meets the requirements can be generated. This target load signal should be able to simulate the load conditions experienced by automotive accessory components in actual use, including load magnitude, frequency, and number of cycles, to ensure the accuracy and reliability of the bench test results.

[0103] In a feasible implementation, step 303 may include: determining an individual set based on the parameter range of the load signal; performing hierarchical sorting based on the individual set to obtain multiple layers of individuals; calculating the crowding value of each individual in the multiple layers to obtain the crowding value of the individuals in each layer; and determining the target load signal based on the crowding value of the individuals in each layer.

[0104] It should be noted that for parameter A min , A1, …, A i ,…,A n 、A max In its numerical range [A min -min,A min -max]、[A1-min,A1-max]、[A i -min,A i -max]、[A n -min,A n -max]、[A max -min,A max -max], randomly generate n individuals to form a set N, i.e., the individual set. Then, perform a sorting operation on these individuals: for individual j in set N, if no individual with constraint functions f1, f2, and f3 smaller than individual j can be found, then j is placed in the first layer. All individuals in set N are traversed sequentially until the first layer of sorting is completed. Individuals placed in the first layer do not participate in the subsequent operations. For individual k among the remaining individuals, if no individual with constraint functions f1, f2, and f3 smaller than individual k can be found, then k is placed in the second layer. The remaining individuals are traversed sequentially until the second layer of sorting is completed, and so on until the mth layer of sorting is completed.

[0105] It can be understood that for individuals x in the same layer, the crowding value L(x) is calculated as follows:

[0106]

[0107] In formula 9, f1 max 、f1 min 、f2 max 、f2 min 、f3 max 、f3 min Respectively represent the maximum and minimum values ​​of the constraint functions f1, f2, and f3 in the same layer of individuals, f1(x) + 、f1(x) - 、f2(x) + 、f2(x) - 、f3(x) + 、f3(x) -They represent the values ​​of the constraint functions f1, f2, and f3 of two adjacent points of individual x in the same layer.

[0108] It is worth noting that for the boundary points on the same layer, the congestion value L is defined as infinite.

[0109] In a feasible embodiment, the target load signal is determined based on the crowding values ​​of the individuals in each layer, including: generating a first set according to the crowding values ​​of the individuals in each layer; performing a crossover operation based on the individuals in the first set to generate a second set; generating a new individual set based on the first set and the second set and executing the step of performing hierarchical sorting based on the individual set to obtain multiple layers of individuals, until the iteration termination condition is met and the target load signal is obtained.

[0110] It should be noted that n individuals are randomly generated to form a set N, and p individuals are randomly selected. The selected individuals are first compared in terms of level. The lower the level value, the better the individual. Then these selected individuals are compared in terms of crowding value. Finally, the individual with the largest crowding value is selected as the best individual. This is selected n times in sequence, and finally the set Q is generated, which is the first combination. U percent of the individuals in the generated set Q are randomly selected to participate in the crossover operation of the genetic algorithm. V percent of the individuals in the generated set Q are randomly selected to participate in the mutation operation of the genetic algorithm, and finally the set R is generated, which is the second set. The generated set R is combined with the set Q to generate the set N. 1 That is, it is a new set of individuals, and then the sorting operation and crowding operation are performed until the number of iterations reaches the maximum number of iterations Tmax or the individual constraint functions f1, f2, and f3 satisfy f1≤Δ1, f2≤Δ2, and f3≤Δ3, then the iterative operation is stopped, where Δ1, Δ2, and Δ3 are iterative error constants. At this time, the individual output is the bench test load signal.

[0111] In this embodiment, the parameter range of the load signal is determined according to the target fatigue life value of the fatigue life value of the automobile accessory structural component, thereby determining the target load signal, thereby improving the automation and efficiency of load measurement.

[0112] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the bench test method for the automotive accessory structural parts of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0113] This application also provides a bench test device for automobile accessory structural parts, please refer to Figure 4 , the bench test device for automobile accessory structural parts includes:

[0114] The construction module 10 is used to construct a finite element model of an automobile accessory structural part.

[0115] The determination module 20 is configured to determine a fatigue life value of an automobile accessory structural component based on the finite element model.

[0116] The determination module 20 is further configured to determine a target load signal based on a fatigue life value of an automobile accessory structural component.

[0117] The test module 30 is used to perform a bench test on the automobile accessory structural component according to the target load signal.

[0118] The present embodiment provides a bench test device for automobile accessory structural parts. The present embodiment can quickly and effectively determine the fatigue life value of the automobile accessory structural parts by first constructing a finite element model of the automobile accessory structural parts; determine the fatigue life value of the automobile accessory structural parts based on the finite element model, thereby improving the accuracy of the fatigue life value; determine a target load signal based on the fatigue life value of the automobile accessory structural parts, thereby improving the efficiency of load signal determination; and perform a bench test on the automobile accessory structural parts according to the target load signal, thereby effectively improving the accuracy of the bench test of the automobile accessory structural parts.

[0119] In summary, this embodiment determines the fatigue life value of the automobile accessory structural parts by constructing a finite element model, thereby determining the target load signal and conducting a bench test on the automobile accessory structural parts. The target load signal determined by the finite element model can realize a quick and accurate bench test, overcoming the technical defects that lead to poor accuracy of the bench test of the automobile accessory structural parts, and can effectively improve the accuracy of the bench test of the automobile accessory structural parts.

[0120] Optionally, the determination module 20 is further configured to generate a stress spectrum density function of the automobile accessory structural component based on the finite element model; and determine a fatigue life value of the automobile accessory structural component based on the stress spectrum density function of the automobile accessory structural component.

[0121] Optionally, the determination module 20 is further used to collect acceleration signals of automobile accessory structural parts under vehicle road durability test conditions; convert the acceleration signals into acceleration power spectrum density signals; obtain fatigue life curves of automobile accessory structural parts; and determine fatigue life values ​​of automobile accessory structural parts based on the stress spectrum density function of the automobile accessory structural parts, the acceleration power spectrum density signals, and the fatigue life curves.

[0122] Optionally, the determination module 20 is further used to obtain a target fatigue life value from the fatigue life values ​​of the automobile accessory structural component; determine a parameter range of the load signal based on the target fatigue life value; and determine a target load signal according to the parameter range of the load signal.

[0123] Optionally, the determination module 20 is further used to perform a uniaxial vibration test on the automotive accessory structural part according to preset load information to obtain a reference fatigue life value; compare the reference fatigue life value with the target fatigue life value to obtain a comparison result; when the comparison result is consistent, calculate according to the reference fatigue life value to obtain a constraint function of the load signal; and determine the parameter range of the load signal based on the constraint function of the load signal.

[0124] Optionally, the determination module 20 is further used to determine an individual set based on the parameter range of the load signal; perform hierarchical sorting based on the individual set to obtain multiple layers of individuals; calculate the crowding value based on each individual in the multiple layers of individuals to obtain the crowding value of each layer of individuals; and determine the target load signal based on the crowding value of each layer of individuals.

[0125] Optionally, the determination module 20 is further used to generate a first set based on the crowding degree values ​​of the individuals in each layer; perform a cross operation based on the individuals in the first set to generate a second set; generate a new individual set based on the first set and the second set and execute the step of performing hierarchical sorting based on the individual set to obtain multiple layers of individuals, until the iteration termination condition is met and the target load signal is obtained.

[0126] The bench test device for automotive accessory components provided in this application utilizes the bench test method for automotive accessory components described in the aforementioned embodiments, thereby resolving the technical challenges of bench testing automotive accessory components. Compared to the prior art, the bench test device for automotive accessory components provided in this application achieves the same beneficial effects as the bench test method for automotive accessory components described in the aforementioned embodiments. Other technical features of the bench test device for automotive accessory components are the same as those disclosed in the aforementioned embodiments and are not further detailed here.

[0127] The present application provides a bench test device for automobile accessory structural parts, the bench test device for automobile accessory structural parts comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the bench test method for automobile accessory structural parts in the above-mentioned embodiment one.

[0128] Reference below Figure 5, which shows a schematic structural diagram of a bench test apparatus suitable for implementing the automotive accessory structural components of the embodiments of the present application. The bench test apparatus for automotive accessory structural components in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The bench test equipment for automobile accessory structural parts shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0129] like Figure 5 As shown, the bench test equipment for automotive accessory structural parts may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for operating the bench test equipment for automotive accessory structural parts. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, hard disk, etc.; and communication devices 1009. Communication devices 1009 can allow the test bench for automotive accessory structural parts to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a test bench for automotive accessory structural parts with various systems, it should be understood that implementation or presence of all the illustrated systems is not required. More or fewer systems may alternatively be implemented or present.

[0130] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0131] The bench test equipment for automotive accessory components provided in this application utilizes the bench test method for automotive accessory components described in the aforementioned embodiment, addressing the technical challenges of bench testing automotive accessory components. Compared to the prior art, the bench test equipment for automotive accessory components provided in this application achieves the same beneficial effects as the bench test method for automotive accessory components described in the aforementioned embodiment. Other technical features of the bench test equipment for automotive accessory components are the same as those disclosed in the aforementioned embodiment and are not further detailed here.

[0132] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0133] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0134] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, wherein the computer-readable program instructions are used to execute the bench test method for the automotive accessory structural component in the above-mentioned embodiment.

[0135] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0136] The computer-readable storage medium may be included in the test bench device for automobile accessory structural parts; or may exist independently without being assembled into the test bench device for automobile accessory structural parts.

[0137] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the bench test equipment for automobile accessory structural parts, the bench test equipment for automobile accessory structural parts: constructs a finite element model of the automobile accessory structural part; determines the fatigue life value of the automobile accessory structural part based on the finite element model; determines a target load signal based on the fatigue life value of the automobile accessory structural part; and performs a bench test on the automobile accessory structural part according to the target load signal.

[0138] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0139] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0140] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0141] The computer-readable storage medium provided in this application stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned bench test method for automotive accessory components. This computer-readable storage medium can address the technical challenges of bench testing automotive accessory components. Compared to the prior art, the computer-readable storage medium provided in this application offers the same beneficial effects as the bench test method for automotive accessory components provided in the aforementioned embodiments, and will not be further elaborated upon here.

[0142] The present application also provides a computer program product, comprising a computer program, which implements the steps of the above-mentioned bench test method for automobile accessory structural parts when executed by a processor.

[0143] The computer program product provided in this application can solve the technical problem of bench testing of automotive accessory components. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the bench testing method for automotive accessory components provided in the above-mentioned embodiment, and are not further elaborated here.

[0144] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A bench test method for automobile accessory structural parts, characterized in that: The method comprises: Construct finite element models of automotive accessory components; Determining a fatigue life value of an automobile accessory structural component based on the finite element model; Determine the target load signal based on the fatigue life value of the automotive accessory structural parts; Obtaining a target fatigue life value from the fatigue life values ​​of the automobile accessory structural component; Perform uniaxial vibration tests on automotive accessory components using preset load information to obtain reference fatigue life values; Comparing the reference fatigue life value with the target fatigue life value to obtain a comparison result; When the comparison result is consistent, calculation is performed based on the reference fatigue life value to obtain a constraint function of the load signal, wherein the constraint function is: L1_bench, L2_bench, and L3_bench represent the first, second, and third lowest life values ​​of automotive accessory structural components obtained from the load signal A(f) of the bench test on a uniaxial vibration test bench, respectively. L1_road, L2_road, and L3_road represent the first, second, and third lowest fatigue life values ​​of automotive accessory structural components under the full vehicle road endurance test conditions. determining a parameter range of the load signal based on a constraint function of the load signal; determining a target load signal according to a parameter range of the load signal; A bench test of an automobile accessory structural component is performed according to the target load signal.

2. The method according to claim 1, wherein Determining the fatigue life value of the automobile accessory structural component based on the finite element model includes: generating a stress spectrum density function of an automobile accessory structural component based on the finite element model; The fatigue life value of the automobile accessory structural component is determined based on the stress spectrum density function of the automobile accessory structural component.

3. The method according to claim 2, wherein The determining of the fatigue life value of the automobile accessory structural component based on the stress spectrum density function of the automobile accessory structural component includes: Collect acceleration signals of automotive accessory components under vehicle road durability test conditions; Converting the acceleration signal into an acceleration power spectrum density signal; Obtain fatigue life curves of automotive accessory components; The fatigue life value of the automobile accessory structural component is determined based on the stress spectrum density function of the automobile accessory structural component, the acceleration power spectrum density signal, and the fatigue life curve.

4. The method according to claim 1, wherein The determining of the target load signal according to the parameter range of the load signal includes: Determining an individual set according to a parameter range of the load signal; Perform hierarchical sorting based on the individual set to obtain multi-layer individuals; Calculating the crowding degree value of each individual in the multi-layer individuals to obtain the crowding degree value of each layer of individuals; A target load signal is determined based on the crowding degree values ​​of the individuals in each layer.

5. The method according to claim 4, wherein The determining of the target load signal based on the congestion degree values ​​of the individuals in each layer includes: Generate a first set according to the crowding degree values ​​of the individuals in each layer; Perform a crossover operation based on the individuals in the first set to generate a second set; A new individual set is generated based on the first set and the second set, and the step of performing hierarchical sorting based on the individual set to obtain multiple layers of individuals is performed until an iteration termination condition is met to obtain a target load signal.

6. A bench test device for automobile accessory structural parts, characterized in that: The bench test device for automobile accessory structural parts comprises: Construction module, used to build finite element models of automotive accessory structural parts; A determination module, configured to determine a fatigue life value of an automobile accessory structural component based on the finite element model; The determination module is further configured to determine a target load signal based on a fatigue life value of an automobile accessory structural component; A test module is configured to perform a bench test on an automobile accessory structural component based on the target load signal; the determination module is further configured to obtain a target fatigue life value from the fatigue life values ​​of the automobile accessory structural component; perform a uniaxial vibration test on the automobile accessory structural component using preset load information to obtain a reference fatigue life value; compare the reference fatigue life value with the target fatigue life value to obtain a comparison result; and when the comparison result is consistent, perform calculation based on the reference fatigue life value to obtain a constraint function of the load signal; when the comparison result is consistent, perform calculation based on the reference fatigue life value to obtain a constraint function of the load signal, wherein the constraint function is: L1_bench, L2_bench, and L3_bench respectively represent the first, second, and third lowest life values ​​obtained from the load signal A(f) of the bench test of the automobile accessory structural parts on the uniaxial vibration test bench; L1_road, L2_road, and L3_road represent the first, second, and third lowest fatigue life values ​​of the automobile accessory structural parts under the whole vehicle road durability test conditions; the parameter range of the load signal is determined based on the constraint function of the load signal; and the target load signal is determined according to the parameter range of the load signal.

7. A bench test equipment for automobile accessory structural parts, characterized in that: The bench test equipment for automobile accessory structural parts includes: a memory, a processor, and a bench test program for automobile accessory structural parts stored in the memory and executable on the processor. The bench test program for automobile accessory structural parts is configured to implement the bench test method for automobile accessory structural parts as described in any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores a bench test program for an automobile accessory structure. When the bench test program for an automobile accessory structure is executed by a processor, the bench test method for an automobile accessory structure according to any one of claims 1 to 5 is implemented.

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