Product component reliability evaluation method and device, equipment and storage medium

Abstract

The embodiment of the invention discloses a product component reliability evaluation method and device, equipment and a storage medium. According to the technical scheme provided by the embodiment of the invention, the critical speed of failure of the to-be-tested component in the drop test of the test fixture is determined, and the first finite element analysis is performed on the test fixture model corresponding to the test fixture based on the critical speed to obtain the first equivalent acceleration; and performing second finite element analysis on the to-be-tested product model to obtain the second equivalent acceleration, determining a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration, effectively evaluating the reliability of the original device of the product, providing a basis for reasonable arrangement of components, and improving the stability of the product.

Description

Technical Field

[0001] The embodiments of the present application relate to component evaluation technology, and more particularly to a method, device, equipment and storage medium for evaluating the reliability of product components. Background Art

[0002] With the rapid development of electronic technology, it is increasingly used in electronic products such as tablet computers, phone watches, etc. Usually, a variety of components, such as crystal oscillator components, are installed in electronic products to achieve various functions of electronic products.

[0003] In the actual use of electronic products, it is inevitable that electronic products will fall and bump, causing the internal components of the product to malfunction. In order to ensure the reliability of the internal components of electronic products, designers need to reasonably arrange the components when designing electronic products. However, it is difficult for designers to make accurate judgments on the risk of component failure during the product design process. They can only rely on experience to arrange components, and the reliability of product components is difficult to guarantee. Summary of the invention

[0004] The embodiments of the present application provide a method, device, equipment and storage medium for evaluating the reliability of product components to solve the technical problem in related technologies that it is difficult for designers to make accurate judgments on the failure risks of components during the product design process and they can only rely on experience to arrange components, and the reliability of product components is difficult to guarantee. The method can effectively evaluate the reliability of the original components of the product, provide a basis for the reasonable arrangement of components, and improve product stability.

[0005] In a first aspect, an embodiment of the present application provides a method for evaluating the reliability of a product component, comprising:

[0006] Determining a critical speed at which a component under test fails during a drop test on a test fixture, the component under test being fixed to the test fixture;

[0007] Based on the critical speed, performing a first finite element analysis on a test fixture model corresponding to the test fixture, and determining a first equivalent acceleration according to the first finite element analysis result, wherein the test fixture model is configured with a first component model corresponding to the component to be tested;

[0008] Based on the critical speed, performing a second finite element analysis on the product model to be tested, and determining a second equivalent acceleration according to the second finite element analysis result, wherein the product model to be tested is configured with a second component model corresponding to the component to be tested;

[0009] A reliability evaluation result is determined according to the first equivalent acceleration and the second equivalent acceleration.

[0010] In a second aspect, an embodiment of the present application provides a product component reliability assessment device, including a critical analysis module, a critical equivalent module, a product equivalent module and an assessment analysis module, wherein:

[0011] The critical analysis module is configured to determine a critical speed at which a component under test fails during a drop test on a test fixture, the component under test being fixed on the test fixture;

[0012] The critical equivalent module is configured to perform a first finite element analysis on a test fixture model corresponding to the test fixture based on the critical speed, and determine a first equivalent acceleration according to the first finite element analysis result, wherein the test fixture model is configured with a first component model corresponding to the component to be tested;

[0013] The product equivalent module is configured to perform a second finite element analysis on the product model to be tested based on the critical speed, and determine a second equivalent acceleration according to the second finite element analysis result, wherein the product model to be tested is configured with a second component model corresponding to the component to be tested;

[0014] The evaluation and analysis module is configured to determine a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration.

[0015] In a third aspect, an embodiment of the present application provides a product component reliability assessment device, including: a memory and one or more processors;

[0016] The memory is used to store one or more programs;

[0017] When the one or more programs are executed by the one or more processors, the one or more processors implement the product component reliability assessment method as described in the first aspect.

[0018] In a fourth aspect, an embodiment of the present application provides a storage medium storing computer executable instructions, which, when executed by a computer processor, are used to execute the product component reliability assessment method as described in the first aspect.

[0019] The embodiment of the present application determines the critical speed at which the component to be tested fails in the drop test of the test fixture, and based on the critical speed, performs a first finite element analysis on the test fixture model corresponding to the test fixture to obtain a first equivalent acceleration, and performs a second finite element analysis on the product model to be tested to obtain a second equivalent acceleration. The reliability assessment result can be determined according to the first equivalent acceleration and the second equivalent acceleration, so as to effectively evaluate the reliability of the original device of the product, provide a basis for the reasonable arrangement of the components, and improve the stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a method for evaluating the reliability of product components provided in an embodiment of the present application;

[0021] Figure 2 It is a structural schematic diagram of a test fixture provided in an embodiment of the present application;

[0022] Figure 3 Another method for evaluating the reliability of product components provided in the embodiment of the present application is

[0023] Figure 4 is a time-displacement relationship curve diagram provided in an embodiment of the present application;

[0024] Figure 5 is a time-acceleration relationship curve diagram provided in an embodiment of the present application;

[0025] Figure 6 is a first acceleration area schematic diagram provided in an embodiment of the present application;

[0026] Figure 7 It is a structural schematic diagram of a product component reliability evaluation device provided in an embodiment of the present application;

[0027] Figure 8 It is a structural schematic diagram of a product component reliability evaluation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the convenience of description, only the part related to the present application but not all the contents are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The above process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The above process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

[0029] Figure 1A flow chart of a product component reliability assessment method provided in an embodiment of the present application is given. The product component reliability assessment method provided in an embodiment of the present application can be executed by a product component reliability assessment device, which can be implemented by hardware and / or software and integrated in a product component reliability assessment device.

[0030] The following description takes the product component reliability evaluation device executing the product component reliability evaluation method as an example. Figure 1 , the reliability evaluation methods of the product components include:

[0031] S110: Determine a critical speed at which a component to be tested fails during a drop test on a test fixture, wherein the component to be tested is fixed on the test fixture.

[0032] Optionally, the components to be tested provided by this solution can be a combination of one or more of a crystal oscillator, a triode, a diode, and a chip. For example, when a crystal oscillator is used as a component to be tested, the crystal oscillator as a whole can be used as the object of evaluation. The crystal oscillator is a structure with a quartz crystal inside and a metal shell package outside. There is rarely any external solder cracking in the failure of electronic products due to falling. The failure of the crystal oscillator is mainly due to internal damage to the crystal oscillator, that is, during the falling process of the electronic product, the crystal oscillator is impacted by the falling of the whole machine, and the internal damage of the crystal oscillator causes the crystal oscillator to fail. This solution does not need to pay too much attention to the internal structure of the crystal oscillator. The crystal oscillator component can be treated as a whole. According to whether the instantaneous acceleration of the crystal oscillator as a whole exceeds the limit instantaneous acceleration that the crystal oscillator as a whole can be used to accurately evaluate the reliability of the crystal oscillator design in the product to be tested, and accurately judge the risk of crystal oscillator failure in the structural design of the product to be tested.

[0033] Exemplarily, the components to be tested that need to be evaluated for reliability are installed on a test fixture (for example, one or more components to be tested are bonded or welded to the test fixture), and a drop test is performed using the test fixture, and the critical speed corresponding to the components to be tested is determined when the components to be tested begin to fail or the number of failed components to be tested reaches a preset ratio or a preset number during the drop test of the test fixture. When the test fixture is dropped and collided, if the speed of the components to be tested is below the critical speed, the components to be tested on the test fixture can maintain normal operation, and when the speed of the components to be tested reaches the critical speed or is above the critical speed, the components to be tested on the test fixture begin to fail, and the failed components to be tested cannot maintain normal operation.

[0034] In one embodiment, the test fixture can be drop tested based on different heights, and after the drop tests at different heights, it is detected whether the components to be tested on the test fixture fail, and when the failed components to be tested appear, the speed at which the components to be tested fail when dropped from the corresponding height is determined, and the speed is used as the critical speed. Optionally, whether the components to be tested fail can be determined by measuring whether the components to be tested can work normally. For example, after each drop test, a measuring device (such as a multimeter) can be used to measure whether the components to be tested can work normally. Exemplarily, when a crystal oscillator is used as a component to be tested, after each drop test, the crystal oscillator electrical signal output by the crystal oscillator is detected by a multimeter, and whether the crystal oscillator fails is determined based on whether the crystal oscillator electrical signal is normal.

[0035] like Figure 2 As shown in the structural schematic diagram of a test fixture provided, the test fixture provided by the present solution includes an upper plate 11, a lower plate 12 and a mainboard fixture 13. The upper plate 11, the lower plate 12 and the mainboard fixture 13 can be made of PC material. A counterweight block 14 (metal counterweight block) is installed on the mainboard fixture 13. The upper plate 11, the lower plate 12 and the mainboard fixture 13 are detachably connected. For example, a plurality of upper connecting columns 111 are provided on the upper plate 11, and lower connecting columns 121 corresponding to the upper connecting columns 111 are provided on the lower plate 12. Through holes are provided at positions corresponding to the upper connecting columns 111 on the mainboard fixture 13. The upper connecting columns 111 of the upper plate 11 and the lower connecting columns 121 of the lower plate 12 can be connected by bolts, and the bolts pass through the through holes on the mainboard fixture 13 to fix the upper plate 11, the lower plate 12 and the mainboard fixture 13, and sandwich the mainboard fixture 13 between the upper plate 11 and the lower plate 12. When a drop test is required, multiple components 21 to be tested can be evenly distributed and fixed (for example, welded) on the mainboard fixture 13, and then the mainboard fixture 13 can be fixed by the upper plate 11 and the lower plate 12. At this time, the test fixture can be drop tested. Optionally, different components 21 to be tested can be fixed on the mainboard fixture 13 in different fixing directions, and drop tests can be performed on the components 21 to be tested in more angles and directions, so as to more comprehensively evaluate the reliability of product components.

[0036] S120: Based on the critical speed, perform a first finite element analysis on a test fixture model corresponding to the test fixture, determine a first equivalent acceleration according to the first finite element analysis result, and configure the test fixture model with a first component model corresponding to the component to be tested.

[0037] Exemplarily, a fixture geometry model of the test fixture is obtained (for example, by digital modeling, three-dimensional scanning, etc.), the fixture geometry model is used as the test fixture model, and the test fixture model is discretized into a finite element model using a preset finite element analysis tool, and the material parameters, connection relationship, boundary conditions, etc. of the test fixture model are set according to the material, connection relationship, boundary conditions, etc. of the test fixture. Among them, one or more first component models corresponding to the components to be tested are configured on the test fixture model, and the connection relationship, boundary conditions, etc. of the first component model can be set according to the connection relationship, boundary conditions, etc. of the components to be tested on the test fixture.

[0038] In one embodiment, the critical speed determined above is input into a finite element analysis tool, and the finite element analysis tool is used to perform a first finite element analysis on the test fixture model corresponding to the test fixture (for example, the finite element analysis tool applies the critical speed to the test fixture model, and the motion state of the critical speed over a period of time (for example, changes in speed, displacement, acceleration, etc. over time) can be recorded at this time), and the first equivalent acceleration of the first component model can be determined according to the first finite element analysis result. Among them, the first equivalent acceleration can be understood as the acceleration corresponding to the speed of the first component model in the test fixture model equivalent to the critical speed when the component under test fails in the drop test.

[0039] S130: Based on the critical speed, a second finite element analysis is performed on the product model to be tested, and a second equivalent acceleration is determined according to the second finite element analysis result. The product model to be tested is configured with a second component model corresponding to the component to be tested.

[0040] Exemplarily, a product geometry model (e.g., generated by digital modeling during the product design process) of a product to be tested (e.g., a watch, a mobile phone, a tablet, etc., and components to be tested are fixed in the mainboard of the product to be tested) is obtained, and the product geometry model is used as the product model to be tested, and the product model to be tested is discretized into a finite element model using a preset finite element analysis tool, and the material parameters, connection relationship, boundary conditions, etc. of the product model to be tested are set according to the material, connection relationship, boundary conditions, etc. of the product model to be tested. Among them, a second component model corresponding to one or more components to be tested is configured on the product model to be tested, and the connection relationship, boundary conditions, etc. of the second component model can be set according to the connection relationship, boundary conditions, etc. of the components to be tested on the product to be tested.

[0041] In one embodiment, the critical speed determined above is input into a finite element analysis tool, and the finite element analysis tool is used to perform a second finite element analysis on the product model to be tested corresponding to the product to be tested (for example, the finite element analysis tool applies the critical speed to the product model to be tested, and the motion state of the critical speed over a period of time (for example, changes in speed, displacement, acceleration, etc. over time) can be recorded at this time), and the second equivalent acceleration at which the second component model begins to fail can be determined based on the second finite element analysis results. The second equivalent acceleration can be understood as the acceleration corresponding to the speed of the second component model in the product model to be tested, which is equivalent to the critical speed when the component to be tested fails in the drop test.

[0042] S140: Determine a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration.

[0043] Exemplarily, after determining the first equivalent acceleration and the second equivalent acceleration, the first equivalent acceleration and the second equivalent acceleration may be compared, and the reliability assessment result of the component under test on the product under test may be determined based on the comparison result of the first equivalent acceleration and the second equivalent acceleration.

[0044] In a possible embodiment, the product component reliability assessment method provided by the present solution determines a reliability assessment result according to the first equivalent acceleration and the second equivalent acceleration, including at least one of the following:

[0045] S141: When the second equivalent acceleration is less than the first equivalent acceleration, determine that the reliability evaluation result is that the component configuration is reliable.

[0046] S142: When the second equivalent acceleration is greater than or equal to the first equivalent acceleration, determine that the reliability evaluation result is that the component configuration is unreliable.

[0047] Exemplarily, the first equivalent acceleration is compared with the second equivalent acceleration. When the second equivalent acceleration is less than the first equivalent acceleration, it can be considered that the arrangement of the components to be tested in the product design is reasonable and the risk of failure is low, and the reliability assessment result is determined to be reliable component configuration. When the second equivalent acceleration is greater than or equal to the first equivalent acceleration, it can be considered that the arrangement of the components to be tested in the product design is unreasonable, the risk of failure is very high, and the arrangement of the components to be tested needs to be further optimized, and the reliability assessment result is determined to be unreliable component configuration.

[0048] In the above, by determining the critical speed at which the component to be tested fails in the drop test of the test fixture, and based on the critical speed, performing a first finite element analysis on the test fixture model corresponding to the test fixture to obtain a first equivalent acceleration, and performing a second finite element analysis on the product model to be tested to obtain a second equivalent acceleration, the reliability assessment result can be determined according to the first equivalent acceleration and the second equivalent acceleration, the reliability of the original device of the product can be effectively evaluated, providing a basis for the reasonable arrangement of components and improving product stability.

[0049] Based on the above embodiments, Figure 3 A flowchart of another method for evaluating the reliability of product components provided in an embodiment of the present application is given. The method for evaluating the reliability of product components is a specific implementation of the above-mentioned method for evaluating the reliability of product components. Figure 3 , the reliability evaluation methods of the product components include:

[0050] S210: Determine a drop test on a test fixture based on multiple drop heights and multiple drop directions, a critical impact height at which a component under test in the test fixture fails in each of the drop directions, and the component under test is fixed on the test fixture.

[0051] S220: Determine the critical speed corresponding to each falling direction according to the critical impact height.

[0052] Exemplarily, the test fixture is drop-tested in sequence based on different combinations of multiple drop heights (e.g., multiple drop heights determined at set height intervals) and multiple drop directions, the drop height at which the components to be tested begin to fail is determined, and the drop height is used as the critical impact height at which the components to be tested fail. For example, for each preset drop direction (e.g., six downward facing directions of the test fixture, i.e., up, down, left, right, front, and back), the test fixture is drop-tested starting from a preset starting height, and the drop height is sequentially increased (e.g., new drop heights are sequentially determined in the order of 0.1m, 0.2m, 0.3m, etc.) to perform a drop test on the test fixture, and after each drop test, it is detected whether there are failed components to be tested, and when failed components to be tested are detected, or when the number of failed components to be tested reaches a preset ratio or a preset number, the corresponding drop height can be determined as the critical impact height.

[0053] In one embodiment, for each preset drop direction, after determining the critical impact height, the critical speed at which the components under test in the test fixture fail in each preset drop direction can be calculated based on the critical impact height. Optionally, the critical speed can be determined based on the following formula:

[0054]

[0055] Among them, Vcri is the critical speed, g is the acceleration of gravity, and H is the critical impact height. This solution accurately determines the critical speed at which the components to be tested fail by performing a drop test on the test fixture based on multiple drop heights, and can more accurately perform finite element analysis on the test fixture model and the product model to be tested, thereby ensuring the accuracy of the reliability assessment of product components.

[0056] In one embodiment, after obtaining the critical speed corresponding to each falling direction, for each falling direction, a first finite element analysis can be performed on the test fixture model corresponding to the test fixture (the critical speed corresponding to the falling direction is input to the test fixture model) based on the critical speed and the corresponding falling direction to determine the first equivalent acceleration, and a second finite element analysis can be performed on the product model to be tested (the critical speed corresponding to the falling direction is input to the product model to be tested) to determine the second equivalent acceleration, and the reliability assessment result of the corresponding falling direction is determined based on the first equivalent acceleration and the second equivalent acceleration.

[0057] S230: Based on the critical speed, perform a first finite element analysis on a test fixture model corresponding to the test fixture, determine a first equivalent acceleration according to the first finite element analysis result, and configure the test fixture model with a first component model corresponding to the component to be tested.

[0058] In a possible embodiment, the product component reliability assessment method provided by the present solution determines the first equivalent acceleration according to the first finite element analysis result, and may include:

[0059] S231: Determine first time-displacement relationship information of a first component model in multiple preset directions according to a first finite element analysis result.

[0060] S232: Determine first time-acceleration relationship information of the first component model according to the first time-displacement relationship information.

[0061] S233: Determine a first equivalent acceleration within a first set time length according to the first time-acceleration relationship information.

[0062] Exemplarily, a first finite element analysis is performed on the test fixture model based on the critical speed to obtain a first finite element analysis result, and the first time-displacement relationship information of the first component model in multiple preset directions (for example, the X-axis direction, the Y-axis direction, and the Z-axis direction) is determined according to the first finite element analysis result, and the first time-displacement relationship information is converted into the first time-acceleration relationship information corresponding to the first component model. For example, the first time-displacement relationship information in multiple preset directions is respectively quadratically derived to obtain the first time-acceleration relationship information in multiple preset directions, and the first time-acceleration relationship information in multiple preset directions is added to obtain the first time-acceleration relationship information.

[0063] For example, the complete test fixture structure is discretized, a finite element analysis model of the test fixture is established as the test fixture model, the material parameters, connection relationship, boundary conditions and load conditions of the test fixture are set, and the first finite element analysis calculation of the test fixture model is started, and the displacement and time curves of the first component model on the test fixture model in multiple preset directions (such as the X-axis direction, the Y-axis direction and the Z-axis direction) are output (for example, the sample point frequency of the first finite element analysis is 2ms, and the displacement point frequency is 2000 times / ms), and the curve is used as the first time-displacement relationship information (such as Figure 4 A time-displacement relationship curve is provided. The first time-displacement relationship information of each preset direction is secondarily derived to obtain the first time-acceleration relationship information corresponding to the first component model in each preset direction, and the first time-acceleration relationship information corresponding to each preset direction is added to obtain the first time-acceleration relationship information (such as Figure 5 A time-acceleration relationship curve is provided).

[0064] After determining the first time-acceleration relationship information, the first equivalent acceleration within the first set time length (for example, 0.1ms) can be determined according to the first time-acceleration relationship information. This solution determines the first time-displacement relationship information of the first component model in multiple preset directions according to the first finite element analysis result, converts the first time-displacement relationship information into the first time-acceleration relationship information, and accurately determines the first equivalent acceleration within the first set time length according to the first time-acceleration relationship information, accurately determines the limit instantaneous acceleration of the component to be tested installed in the test fixture model in the simulation scenario, and can more accurately evaluate the reliability of the component.

[0065] In a possible embodiment, the acceleration of the first component model can be equivalent to a constant acceleration within a first set time length using the equal area method according to the half-wave principle. Based on this, the product component reliability assessment method provided by the present solution determines the first equivalent acceleration within the first set time length according to the first time-acceleration relationship information, and may include: determining the first acceleration area on the preset half-wave according to the first time-acceleration relationship information; determining a first ratio of the first acceleration area to the first set time length, and determining the first ratio as the first equivalent acceleration.

[0066] Exemplarily, a first acceleration area on a preset half-wave (e.g., a positive half-wave or a negative half-wave) is determined according to the first time-acceleration relationship information, wherein the first acceleration area is an area enclosed by the acceleration peak position in the first time-acceleration relationship information and the X-axis, such as Figure 6A first acceleration area schematic diagram is provided, in which the curve above the X-axis is Figure 5 The curve corresponding to an acceleration peak position in the first time-acceleration relationship information is shown in FIG. 1 , and the shaded portion in the figure is the area enclosed by an acceleration peak position in the first time-acceleration relationship information and the X-axis. Further, a first ratio of the first acceleration area to a first set time length (e.g., 0.1 ms) is determined, and the first ratio can be determined as the first equivalent acceleration.

[0067] In one embodiment, in the first time-acceleration relationship information, there may be one or more acceleration peak positions, and the acceleration corresponding to the acceleration peak position may be greater than zero or less than zero. For example, the peak or trough corresponding position of the peak or trough whose absolute value of acceleration reaches the preset acceleration threshold value among the multiple peaks or troughs of the first time-acceleration relationship information may be used as the acceleration peak position (for example, the corresponding range from the intersection with the X-axis to the corresponding peak or trough, and then to the next intersection with the X-axis). For each acceleration peak position, the corresponding first acceleration area is determined respectively, and the first ratio of the first acceleration area to the first set time length is used as the first equivalent acceleration corresponding to the acceleration peak position.

[0068] In one embodiment, after obtaining multiple first equivalent accelerations, the first equivalent acceleration with the smallest acceleration value can be used as the first equivalent acceleration for finally determining the reliability evaluation result together with the second equivalent acceleration, that is, the smallest first equivalent acceleration is used as the equivalent critical acceleration at which the component to be tested fails, and is compared with multiple equivalent critical accelerations (second equivalent accelerations) of the actual product to more accurately and comprehensively evaluate the reliability of the component.

[0069] This solution uses the equal-area method according to the half-wave principle to equate the acceleration of the first component model to the first equivalent acceleration within a first set time length, accurately determines the limit instantaneous acceleration of the component to be tested installed on the test fixture model in a simulation scenario, and can more accurately evaluate the reliability of the component.

[0070] S240: Based on the critical speed, a second finite element analysis is performed on the product model to be tested, and a second equivalent acceleration is determined according to the second finite element analysis result. The product model to be tested is configured with a second component model corresponding to the component to be tested.

[0071] In a possible embodiment, the product component reliability assessment method provided by the present solution determines the second equivalent acceleration according to the second finite element analysis result, including:

[0072] S241: Determine second time-displacement relationship information of a second component model in multiple preset directions according to a second finite element analysis result.

[0073] S242: Determine second time-acceleration relationship information of the second component model according to the second time-displacement relationship information.

[0074] S243: Determine a second equivalent acceleration within a second set time length according to the second time-acceleration relationship information.

[0075] Exemplarily, a second finite element analysis is performed on the product model to be tested based on the critical speed to obtain a second finite element analysis result, and second time-displacement relationship information of the second component model in multiple preset directions (for example, the X-axis direction, the Y-axis direction, and the Z-axis direction) is determined according to the second finite element analysis result, and the second time-displacement relationship information is converted into second time-acceleration relationship information corresponding to the second component model. For example, the second time-displacement relationship information in multiple preset directions is respectively derivatized twice to obtain the second time-acceleration relationship information in multiple preset directions, and the second time-acceleration relationship information in multiple preset directions is added to obtain the second time-acceleration relationship information.

[0076] For example, the complete structure of the product to be tested is discretized, a finite element analysis model of the product to be tested is established as the product model to be tested, the material parameters, connection relationship, boundary conditions and load conditions of the product to be tested are set, and the second finite element analysis calculation is started on the product model to be tested, and the displacement and time curves of the second component model on the product model to be tested in multiple preset directions (such as the X-axis direction, the Y-axis direction and the Z-axis direction) are output (for example, the sample point frequency of the second finite element analysis is 2ms, and the displacement point frequency is 2000 times / ms), and the curves are used as the second time-displacement relationship information. The second time-displacement relationship information of each preset direction is secondarily derived to obtain the second time-acceleration relationship information corresponding to the second component model in each preset direction, and the second time-acceleration relationship information corresponding to each preset direction is added to obtain the second time-acceleration relationship information.

[0077] After determining the second time-acceleration relationship information, the second equivalent acceleration within the second set time length (for example, 0.1ms) can be determined according to the second time-acceleration relationship information. This solution determines the second time-displacement relationship information of the second component model in multiple preset directions according to the second finite element analysis results, converts the second time-displacement relationship information into second time-acceleration relationship information, and accurately determines the second equivalent acceleration within the second set time length according to the second time-acceleration relationship information, accurately determines the limit instantaneous acceleration of the component to be tested installed in the product model to be tested in the simulation scenario, and can more accurately evaluate the reliability of the component.

[0078] In a possible embodiment, the acceleration of the second component model can be equivalent to a constant acceleration within a second set time length using the equal area method according to the half-wave principle. Based on this, the product component reliability assessment method provided by the present solution determines the second equivalent acceleration within the second set time length according to the second time-acceleration relationship information, including: determining the second acceleration area on the preset half-wave according to the second time-acceleration relationship information; determining a second ratio of the second acceleration area to the second set time length, and determining the second ratio as the second equivalent acceleration.

[0079] Exemplarily, a second acceleration area on a preset half-wave (e.g., a positive half-wave or a negative half-wave) is determined according to the second time-acceleration relationship information, wherein the second acceleration area is an area enclosed by the acceleration and the X-axis in the second time-acceleration relationship information. Further, a second ratio of the second acceleration area to a second set time length (e.g., 0.1 ms) is determined, and the second ratio can be determined as the second equivalent acceleration.

[0080] In one embodiment, in the second time-acceleration relationship information, there may be one or more acceleration peak positions, and the acceleration corresponding to the acceleration peak position may be greater than zero or less than zero. For example, among the multiple peaks or troughs of the second time-acceleration relationship information, the corresponding position of the peak or trough whose absolute value of acceleration reaches the preset acceleration threshold value may be taken as the acceleration peak position (for example, the corresponding range from the intersection with the X-axis to the corresponding peak or trough, and then to the next intersection with the X-axis). For each acceleration peak position, the corresponding second acceleration area is determined respectively, and the second ratio of the second acceleration area to the second set time length is taken as the second equivalent acceleration corresponding to the acceleration peak position.

[0081] This solution uses the equal-area method according to the half-wave principle to equate the acceleration of the second component model to a second equivalent acceleration within a second set time length, thereby accurately determining the limit instantaneous acceleration of the component under test when installed in the product model under test in a simulated scenario, and can more accurately evaluate the reliability of the component.

[0082] S250: Determine a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration.

[0083] As mentioned above, by determining the critical speed at which the components to be tested fail in the drop test of the test fixture, and based on the critical speed, performing a first finite element analysis on the test fixture model corresponding to the test fixture to obtain a first equivalent acceleration, and performing a second finite element analysis on the product model to be tested to obtain a second equivalent acceleration, the reliability assessment result can be determined based on the first equivalent acceleration and the second equivalent acceleration, which can effectively assess the reliability of the original components of the product, provide a basis for the reasonable arrangement of components, and improve product stability. At the same time, by accurately determining the critical speed at which the components to be tested fail based on the critical impact height determined by performing a drop test on the test fixture based on multiple drop heights, the finite element analysis of the test fixture model and the product model to be tested can be performed more accurately to ensure the accuracy of the reliability assessment of the product components.

[0084] Figure 7 A schematic diagram of the structure of a product component reliability evaluation device provided in an embodiment of the present application is given. Figure 7 The product component reliability evaluation device includes a critical analysis module 71, a critical equivalent module 72, a product equivalent module 73 and an evaluation analysis module 74.

[0085] Wherein, the critical analysis module 71 is configured to determine the critical speed at which the component under test fails in a drop test on the test fixture, and the component under test is fixed on the test fixture;

[0086] A critical equivalent module 72 is configured to perform a first finite element analysis on a test fixture model corresponding to the test fixture based on the critical speed, and determine a first equivalent acceleration according to the first finite element analysis result, wherein the test fixture model is configured with a first component model corresponding to the component to be tested;

[0087] The product equivalent module 73 is configured to perform a second finite element analysis on the product model to be tested based on the critical speed, and determine a second equivalent acceleration according to the second finite element analysis result, wherein the product model to be tested is configured with a second component model corresponding to the component to be tested;

[0088] The evaluation and analysis module 74 is configured to determine a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration.

[0089] In the above, by determining the critical speed at which the component to be tested fails in the drop test of the test fixture, and based on the critical speed, performing a first finite element analysis on the test fixture model corresponding to the test fixture to obtain a first equivalent acceleration, and performing a second finite element analysis on the product model to be tested to obtain a second equivalent acceleration, the reliability assessment result can be determined according to the first equivalent acceleration and the second equivalent acceleration, the reliability of the original device of the product can be effectively evaluated, providing a basis for the reasonable arrangement of components and improving product stability.

[0090] In a possible embodiment, the critical analysis module 71 determines the critical speed at which the component under test fails in the drop test of the test fixture, including:

[0091] Determine the critical impact height at which the components under test in the test fixture fail in each drop direction when performing a drop test on the test fixture based on multiple drop heights and multiple drop directions;

[0092] The critical speed corresponding to each falling direction is determined according to the critical impact height.

[0093] In a possible embodiment, the critical equivalent module 72 determines the first equivalent acceleration according to the first finite element analysis result, including:

[0094] Determining first time-displacement relationship information of a first component model in multiple preset directions according to a first finite element analysis result;

[0095] Determine first time-acceleration relationship information of the first component model according to the first time-displacement relationship information;

[0096] A first equivalent acceleration within a first set time length is determined according to the first time-acceleration relationship information.

[0097] In a possible embodiment, the critical equivalent module 72 determines the first equivalent acceleration within the first set time length according to the first time-acceleration relationship information, including:

[0098] Determining a first acceleration area on a preset half-wave according to the first time-acceleration relationship information;

[0099] A first ratio of a first acceleration area to a first set time length is determined, and the first ratio is determined as a first equivalent acceleration.

[0100] In a possible embodiment, the product equivalent module 73 determines the second equivalent acceleration according to the second finite element analysis result, including:

[0101] Determining second time-displacement relationship information of a second component model in a plurality of preset directions according to a second finite element analysis result;

[0102] Determine second time-acceleration relationship information of the second component model according to the second time-displacement relationship information;

[0103] A second equivalent acceleration within a second set time length is determined according to the second time-acceleration relationship information.

[0104] In a possible embodiment, the product equivalent module 73 determines the second equivalent acceleration within the second set time length according to the second time-acceleration relationship information, including:

[0105] Determining a second acceleration area on a preset half-wave according to the second time-acceleration relationship information;

[0106] A second ratio of the second acceleration area to the second set time length is determined, and the second ratio is determined as the second equivalent acceleration.

[0107] In a possible embodiment, the evaluation and analysis module 74 determines the reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration, including at least one of the following:

[0108] When the second equivalent acceleration is less than the first equivalent acceleration, it is determined that the reliability assessment result is that the component configuration is reliable;

[0109] When the second equivalent acceleration is greater than or equal to the first equivalent acceleration, it is determined that the reliability evaluation result is that the component configuration is unreliable.

[0110] It is worth noting that in the embodiment of the above-mentioned product component reliability assessment device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present application.

[0111] The embodiment of the present application also provides a product component reliability assessment device, which can integrate the product component reliability assessment device provided in the embodiment of the present application. Figure 8 Schematic diagram of a product component reliability evaluation device provided in an embodiment of the present application. Figure 8 The product component reliability assessment device includes: an input device 83, an output device 84, a memory 82 and one or more processors 81; the memory 82 is used to store one or more programs; when one or more programs are executed by one or more processors 81, the one or more processors 81 implement the product component reliability assessment method provided in the above embodiment. The input device 83, the output device 84, the memory 82 and the processor 81 can be connected by a bus or other means. Figure 8 The example of connecting through bus is taken in the following.

[0112] The memory 82, as a computing device readable storage medium, can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the product component reliability assessment method provided in any embodiment of the present application (for example, the critical analysis module 71, the critical equivalent module 72, the product equivalent module 73 and the assessment analysis module 74 in the product component reliability assessment device). The memory 82 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the device, etc. In addition, the memory 82 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 82 may further include a memory remotely arranged relative to the processor 81, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0113] The input device 83 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the device. The output device 84 may include a display device such as a display screen.

[0114] The processor 81 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 82, that is, implements the above-mentioned product component reliability evaluation method.

[0115] The product component reliability assessment device, equipment and computer provided above can be used to execute the product component reliability assessment method provided in any of the above embodiments, and have corresponding functions and beneficial effects.

[0116] The embodiment of the present application also provides a storage medium storing computer executable instructions, which, when executed by a computer processor, are used to execute the product component reliability assessment method provided in the above embodiment, the product component reliability assessment method comprising: determining a critical speed at which a component to be tested fails in a drop test on a test fixture, wherein the component to be tested is fixed on the test fixture; based on the critical speed, performing a first finite element analysis on a test fixture model corresponding to the test fixture, determining a first equivalent acceleration according to the first finite element analysis result, and configuring the test fixture model with a first component model corresponding to the component to be tested; based on the critical speed, performing a second finite element analysis on a product model to be tested, determining a second equivalent acceleration according to the second finite element analysis result, and configuring the product model to be tested with a second component model corresponding to the component to be tested; and determining a reliability assessment result according to the first equivalent acceleration and the second equivalent acceleration.

[0117] Storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media, such as CD-ROM, floppy disk or tape device; computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disk or optical storage); registers or other similar types of memory elements, etc. Storage media may also include other types of memory or combinations thereof. In addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a different second computer system, which is connected to the first computer system via a network (such as the Internet). The second computer system can provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (for example, in different computer systems connected by a network). The storage medium may store program instructions (for example, embodied as a computer program) that can be executed by one or more processors.

[0118] Of course, the computer executable instructions of a storage medium storing computer executable instructions provided in an embodiment of the present application are not limited to the product component reliability evaluation method provided above, but can also execute related operations in the product component reliability evaluation method provided in any embodiment of the present application.

[0119] The product component reliability assessment apparatus, device and storage medium provided in the above embodiments can execute the product component reliability assessment method provided in any embodiment of the present application. For technical details not described in detail in the above embodiments, please refer to the product component reliability assessment method provided in any embodiment of the present application.

[0120] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments provided herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A method for evaluating the reliability of product components, characterized in that: include: Determining a critical speed at which a component under test fails during a drop test on a test fixture, the component under test being fixed to the test fixture; Based on the critical speed, performing a first finite element analysis on a test fixture model corresponding to the test fixture, and determining a first equivalent acceleration according to the first finite element analysis result, wherein the test fixture model is configured with a first component model corresponding to the component to be tested; Based on the critical speed, performing a second finite element analysis on the product model to be tested, and determining a second equivalent acceleration according to the second finite element analysis result, wherein the product model to be tested is configured with a second component model corresponding to the component to be tested; A reliability evaluation result is determined according to the first equivalent acceleration and the second equivalent acceleration.

2. The product component reliability evaluation method according to claim 1, characterized in that: Determining the critical speed at which the component under test fails in the drop test of the test fixture includes: Determine a critical impact height at which a component under test in the test fixture fails in each of the drop directions based on multiple drop heights and multiple drop directions for drop testing of the test fixture; The critical speed corresponding to each of the falling directions is determined according to the critical impact height.

3. The product component reliability evaluation method according to claim 1, characterized in that: The determining of the first equivalent acceleration according to the first finite element analysis result comprises: Determine first time-displacement relationship information of the first component model in multiple preset directions according to the first finite element analysis result; Determine first time-acceleration relationship information of the first component model according to the first time-displacement relationship information; A first equivalent acceleration within a first set time length is determined according to the first time-acceleration relationship information.

4. The method for evaluating the reliability of product components according to claim 3, characterized in that: The determining, according to the first time-acceleration relationship information, a first equivalent acceleration within a first set time length comprises: Determining a first acceleration area on a preset half-wave according to the first time-acceleration relationship information; A first ratio of the first acceleration area to the first set time length is determined, and the first ratio is determined as a first equivalent acceleration.

5. The product component reliability evaluation method according to claim 1, characterized in that: The determining of the second equivalent acceleration according to the second finite element analysis result comprises: Determining second time-displacement relationship information of the second component model in multiple preset directions according to the second finite element analysis result; Determine second time-acceleration relationship information of the second component model according to the second time-displacement relationship information; A second equivalent acceleration within a second set time length is determined according to the second time-acceleration relationship information.

6. The method for evaluating the reliability of product components according to claim 5, characterized in that: The determining, according to the second time-acceleration relationship information, a second equivalent acceleration within a second set time length comprises: Determining a second acceleration area on a preset half-wave according to the second time-acceleration relationship information; A second ratio of the second acceleration area to the second set time length is determined, and the second ratio is determined as a second equivalent acceleration.

7. The product component reliability evaluation method according to claim 1, characterized in that: The determining of the reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration includes at least one of the following: When the second equivalent acceleration is less than the first equivalent acceleration, determining that the reliability evaluation result is that the component configuration is reliable; When the second equivalent acceleration is greater than or equal to the first equivalent acceleration, it is determined that the reliability evaluation result is that the component configuration is unreliable.

8. A product component reliability assessment device, characterized in that: It includes critical analysis module, critical equivalent module, product equivalent module and evaluation analysis module, among which: The critical analysis module is configured to determine a critical speed at which a component under test fails during a drop test on a test fixture, the component under test being fixed on the test fixture; The critical equivalent module is configured to perform a first finite element analysis on a test fixture model corresponding to the test fixture based on the critical speed, and determine a first equivalent acceleration according to the first finite element analysis result, wherein the test fixture model is configured with a first component model corresponding to the component to be tested; The product equivalent module is configured to perform a second finite element analysis on the product model to be tested based on the critical speed, and determine a second equivalent acceleration according to the second finite element analysis result, wherein the product model to be tested is configured with a second component model corresponding to the component to be tested; The evaluation and analysis module is configured to determine a reliability evaluation result according to the first equivalent acceleration and the second equivalent acceleration.

9. A product component reliability assessment device, characterized in that: include: memory and one or more processors; The memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the product component reliability assessment method as described in any one of claims 1-7.

10. A storage medium storing computer executable instructions, characterized in that: The computer executable instructions are used to execute the product component reliability evaluation method as described in any one of claims 1 to 7 when executed by a computer processor.

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