Auxiliary power unit component life assessment method and device

Abstract

The present invention discloses a method and device for life assessment of auxiliary power unit components. The technical solution of the present application is adopted to determine a target auxiliary power unit, generate a target auxiliary power unit digital model according to the target auxiliary power unit, and subsequently conduct an overall test, thereby avoiding the problem of large errors in the assessment results when the existing analysis and assessment method is directly applied to the finite element model of a single component; by determining the vibration transmission points on the digital model of the target auxiliary power unit, and taking the vibration transmission points as the starting point of random vibration, the digital model of the target auxiliary power unit is subjected to a random vibration test, and the vibration speed and vibration stress corresponding to each first component are obtained, thereby reducing the error of the assessment result of the life assessment; by determining the life assessment result of the first component in the target auxiliary power unit according to the life information, vibration speed and vibration stress of the first component, the accuracy of the final life assessment result determined is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of service life assessment, and in particular to a method and device for assessing the service life of auxiliary power device components. Background Art

[0002] The auxiliary power unit refers to the onboard power unit on an aircraft other than the main power unit. Its main function is to provide compressed air for starting the main engine and for the aircraft environmental control system.

[0003] As an aircraft-borne equipment, the auxiliary power unit should work normally under the vibration conditions generated by various operating conditions of the aircraft, and should not fail or be damaged during its service life due to the vibration environment. Therefore, it is necessary to establish a suitable and accurate method to evaluate the random vibration intensity of the auxiliary power unit structure and its accessories. The existing evaluation method directly evaluates the finite element digital model of the specific component after establishing the finite element digital model of the independent specific component. The evaluation process is very different from the actual working conditions of the auxiliary power unit, and the evaluation results are inaccurate. Summary of the invention

[0004] The invention provides a method and a device for assessing the life of components of an auxiliary power device, so as to solve the problem that the traditional method has inaccurate assessment results on the life of components in the auxiliary power device.

[0005] According to one aspect of the present invention, a method for assessing the life of an auxiliary power unit component is provided, the method comprising:

[0006] Determine a target auxiliary power unit, and generate a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, which is a component that needs to be evaluated for life, and the digital model of the target auxiliary power unit includes a digital model of the first component, which is generated by modeling the first component;

[0007] Determine the vibration transmission point on the digital model of the target auxiliary power unit, where the vibration transmission point is the starting point for performing a random vibration test on the target auxiliary power unit;

[0008] Taking the vibration transmission point as the random vibration starting point, a random vibration test is performed on the digital model of the target auxiliary power unit to obtain the vibration speed and vibration stress corresponding to each first component;

[0009] Determining life information of the first component, the life information reflecting a relationship between a stress level and a material life;

[0010] A life assessment result of the first component in the target auxiliary power unit is determined according to the life information, the vibration velocity and the vibration stress of the first component.

[0011] According to another aspect of the present invention, there is provided a device for assessing the life of an auxiliary power unit component, the device comprising:

[0012] The digital model building module is used to determine a target auxiliary power unit and generate a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, which is a component that needs to be evaluated for life, and the digital model of the target auxiliary power unit includes a digital model of the first component, which is generated by modeling the first component;

[0013] A transmission point determination module is used to determine the vibration transmission point on the digital model of the target auxiliary power unit, and the vibration transmission point is the starting point for performing a random vibration test on the target auxiliary power unit;

[0014] A vibration test module is used to perform a random vibration test on the target auxiliary power unit digital model with the vibration transmission point as the random vibration starting point, and obtain the vibration speed and vibration stress corresponding to each first component;

[0015] A life information determination module, used to determine the life information of the first component, where the life information reflects the relationship between the stress level and the material life;

[0016] The evaluation result determination module is used to determine the life evaluation result of the first component in the target auxiliary power unit according to the life information, vibration speed and vibration stress of the first component.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] at least one processor; and

[0019] a memory communicatively connected to at least one processor; wherein,

[0020] The memory stores a computer program executable by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can execute the auxiliary power unit component life assessment method according to any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions for implementing the auxiliary power unit component life assessment method according to any embodiment of the present invention when the computer instructions are executed by a processor.

[0022] The technical solution of the embodiment of the present invention determines the target auxiliary power unit, generates a digital model of the target auxiliary power unit based on the target auxiliary power unit, and then performs an overall test, thereby avoiding the problem of large errors in the evaluation results when the existing analysis and evaluation method is directly applied to the finite element model of a single component; in addition, by determining the vibration transmission points on the digital model of the target auxiliary power unit, and taking the vibration transmission points as the starting points of random vibration, a random vibration test is performed on the digital model of the target auxiliary power unit to obtain the vibration speed and vibration stress corresponding to each first component, thereby reducing the error between the evaluation result of the life evaluation and the actual result; by determining the life evaluation result of the first component in the target auxiliary power unit based on the life information, vibration speed and vibration stress of the first component, the accuracy of the final life evaluation result determined is guaranteed.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a flow chart of a method for assessing the life of an auxiliary power unit component provided according to Embodiment 1 of the present invention;

[0026] Figure 2 is a flow chart of another auxiliary power unit component life assessment method provided according to the second embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a device for assessing the life of an auxiliary power unit component provided according to a third embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of an electronic device for implementing the auxiliary power unit component life assessment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Embodiment 1

[0032] Figure 1 A flowchart of a method for evaluating the life of an auxiliary power unit component is provided for the first embodiment of the present invention. This embodiment is applicable to the case of evaluating at least one life component in an auxiliary power unit. The method can be performed by an auxiliary power unit component life evaluation device. The auxiliary power unit component life evaluation device can be implemented in the form of hardware and / or software. The auxiliary power unit component life evaluation device can be configured in an electronic device with data processing capabilities. Figure 1 As shown, the method includes:

[0033] S110, determining a target auxiliary power unit, and generating a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, which is a component requiring life assessment, and the digital model of the target auxiliary power unit includes a digital model of the first component, which is generated by modeling the first component.

[0034] The auxiliary power unit can be an onboard power unit other than the main power unit on the aircraft, and its main function is to provide compressed air for the start of the main engine, provide compressed air for the aircraft environmental control system, provide ground power for the aircraft power system, and provide backup power after the main engine of the aircraft fails. The target auxiliary power unit can be an auxiliary power unit that needs to be tested for component life. The digital model of the auxiliary power unit can be generated by combining the detailed finite element models of each component in the auxiliary power unit, and has the same physical properties as the auxiliary power unit, including the connection relationship of each component and the weight and center of gravity position of each component. The first component is the component in the target auxiliary power unit that needs to be evaluated for life.

[0035] As an aircraft-borne equipment, the auxiliary power unit should work normally under the vibration conditions generated by various aircraft working conditions, and should not fail or be damaged during its service life due to the vibration environment. Currently, the random vibration strength assessment of the auxiliary power unit mostly adopts the establishment of an independent specific component finite element model, and applies random vibration loads to the model. However, the random vibration load transmitted from the aircraft to the auxiliary power unit is at the cabin wall, and the random vibration load transmitted to the components or accessories is unknown and may be large or small. The existing analysis and assessment methods are directly applied to the finite element model of the components, which is wrong.

[0036] Therefore, in order to avoid the above problems, a digital model of the target auxiliary power unit as a whole will be established, and the first component that needs to be evaluated for life will be determined. When the life of the first component is evaluated, the digital model of the target auxiliary power unit will be used for testing.

[0037] In an optional solution, generating a target auxiliary power unit digital model according to the target auxiliary power unit may include steps A1-A5:

[0038] Step A1: According to the target auxiliary power unit, a component digital model of each component in the target auxiliary power unit is established, and the component digital model is a detailed finite element digital model.

[0039] Step A2, determining at least one first component digital model, at least one second component digital model and at least one third component digital model from the component digital models, the second component digital model is a digital model constructed for a component having a load-bearing specific gravity greater than or equal to a preset specific gravity in the target auxiliary power unit, and the third component digital model is a digital model constructed for a component having a load-bearing specific gravity less than a preset specific gravity in the target auxiliary power unit.

[0040] Step A3, determining at least one digital model structural feature in the second component digital model and the third component digital model, and determining a target digital model structural feature from each digital model structural feature, wherein the target digital model structural feature is a digital model structural feature whose influence on the stiffness of the component digital model is less than a preset influence.

[0041] Step A4: simplify the structural features of the target digital model to obtain a fourth component digital model corresponding to the second component digital model and a fifth component digital model corresponding to the third component digital model.

[0042] Step A5: Obtain a target auxiliary power unit digital model according to the fourth component digital model, the fifth component digital model and the first component digital model.

[0043] The second component digital model is a digital model constructed for a component in the target auxiliary power unit whose load-bearing weight is greater than or equal to a preset weight. The third component digital model is a digital model constructed for a component in the target auxiliary power unit whose load-bearing weight is less than a preset weight. The target digital model structural feature is a digital model structural feature whose influence on the stiffness of the component digital model is less than a preset influence. The fourth component digital model is a data model obtained by simplifying the corresponding target digital model structural feature of the second component digital model. The fifth component digital model is a data model obtained by simplifying the corresponding target digital model structural feature of the third component digital model.

[0044] After the target auxiliary power unit is determined, the various components included in the target auxiliary power unit can be determined. At this time, each component can be modeled to obtain a component digital model of each component.

[0045] In order to ensure that the component digital model can have the characteristics of each component in actual circumstances, the component digital model will be established as a detailed finite element digital model.

[0046] After obtaining the component digital model of each component, since different components have different load-bearing ratios in the target auxiliary power unit, the corresponding component digital model of the component with a lower load-bearing ratio has less influence on the life assessment of the first component digital model, and the determination of the structural features of the target digital model also has a certain influence. At this time, it can be considered to separate the component digital model with a load-bearing ratio less than the preset ratio from the component digital model with a load-bearing ratio greater than the preset ratio, and determine the corresponding target digital model structural features respectively. And simplify or omit the structural features of the target digital model respectively, so as to obtain the fourth component digital model corresponding to the second component digital model and the fifth component digital model corresponding to the third component digital model.

[0047] Finally, the digital model of the fourth component and the digital model of the fifth component form a complete initial digital model of the target auxiliary power unit, and the digital model of the first component replaces the position of the first component in the initial digital model to generate the digital model of the target auxiliary power unit.

[0048] By determining at least one second component digital model and at least one third component digital model, when subsequently simplifying the at least one second component digital model and the at least one third component digital model, the rigidity characteristics of the component digital models can be kept as unchanged as possible, thereby avoiding errors caused by different rigidity characteristics in subsequent experiments and reducing the amount of calculation in the evaluation process, thereby improving the evaluation efficiency.

[0049] In an optional solution, obtaining the target auxiliary power unit digital model according to the fourth component digital model, the fifth component digital model and the first component digital model may include steps B1-B2:

[0050] Step B1: Bind the fourth component digital model and the fifth component digital model by flange surface to obtain an initial target auxiliary power unit digital model.

[0051] Step B2: replacing the component digital model corresponding to the first component digital model in the initial target auxiliary power unit digital model with the first component digital model to obtain the target auxiliary power unit digital model.

[0052] After obtaining the digital model of the fourth component and the digital model of the fifth component, in order to ensure the stability of the connection and the accuracy of the subsequent vibration transmission process, it is possible to consider flange surface binding the digital model of the fourth component and the digital model of the fifth component, thereby improving the stability of the connection between the digital model of the fourth component and the digital model of the fifth component, thereby obtaining the initial target auxiliary power unit digital model.

[0053] In addition, after obtaining the initial target auxiliary power unit digital model, in order to ensure the accuracy of the first component digital model in subsequent simulations, it is necessary to replace the component digital model corresponding to the first component digital model in the initial target auxiliary power unit digital model with the first component digital model, thereby using the unsimplified first component digital model to replace the component digital model corresponding to the first component digital model in the initial target auxiliary power unit digital model, thereby improving the accuracy of subsequent evaluation results.

[0054] In an optional solution, the fourth component digital model and the fifth component digital model are flange-bound to obtain an initial target auxiliary power unit digital model, which may include C1-C2:

[0055] Step C1, connecting the fourth component digital model with flange surface bolts to obtain the first target device component assembly digital model.

[0056] Step C2: generating an initial target auxiliary power unit digital model based on the first target device component group digital model and the fifth component digital model.

[0057] Since the digital model of the fourth component is a data model obtained by simplifying the structural features of the corresponding target digital model of the digital model of the second component, and the digital model of the second component is a digital model constructed by components with a load-bearing specific gravity greater than or equal to the preset specific gravity in the target auxiliary power unit, the digital model of the fourth component needs to be responsible for bearing a larger load, or even a more critical load, in the digital model of the target auxiliary power unit. Therefore, in order to ensure that it can meet the load-bearing requirements, the digital model of the fourth component will be connected with a flange surface bolt structure to obtain the digital model of the first target device component group.

[0058] After the first target device component assembly digital model is obtained, the fifth component digital model is connected to the first target device component assembly digital model by flange surface binding, thereby obtaining an initial target auxiliary power unit digital model.

[0059] In an optional solution, after the initial target auxiliary power unit digital model is generated based on the first target device component assembly digital model and the fifth component digital model, the method further includes steps D1-D2:

[0060] Step D1, determining the mass deviation and center of mass position deviation between the initial target auxiliary power unit digital model and the target auxiliary power unit.

[0061] Step D2: If the mass deviation is greater than the first deviation threshold or the mass center position deviation is greater than the second deviation threshold, adjust the initial target auxiliary power unit digital model until the mass deviation is less than the first deviation threshold and the mass center position deviation is less than the second deviation threshold.

[0062] After the initial target auxiliary power unit digital model is constructed, in order to ensure that the simulation results are more consistent with the actual situation of the target auxiliary power unit, it is necessary to judge the mass and center of mass position of the initial target auxiliary power unit digital model.

[0063] Therefore, it is necessary to determine the mass and center of mass position of the constructed initial target auxiliary power unit digital model and the target auxiliary power unit, and calculate the deviation in mass and center of mass position between the initial target auxiliary power unit digital model and the target auxiliary power unit, so as to obtain the mass deviation and center of mass position deviation.

[0064] When the mass deviation is greater than the first deviation threshold or the center of mass position deviation is greater than the second deviation threshold, it will be determined that the constructed initial target auxiliary power unit digital model is difficult to simulate the state of the target auxiliary power unit in actual work. At this time, the initial target auxiliary power unit digital model will be adjusted until the mass deviation is less than the first deviation threshold and the center of mass position deviation is less than the second deviation threshold.

[0065] S120, determining a vibration transmission point on the digital model of the target auxiliary power unit, where the vibration transmission point is a starting point for performing a random vibration test on the target auxiliary power unit.

[0066] S130, taking the vibration transmission point as the random vibration starting point, performing a random vibration test on the target auxiliary power unit digital model to obtain the vibration speed and vibration stress corresponding to each first component.

[0067] Since the auxiliary power unit is generally installed on an aircraft, the vibration transmission of the auxiliary power unit often comes from the connection point between the aircraft and the auxiliary power unit. In order to reduce the error between the evaluation result and the actual result of the life assessment, it is necessary to determine the vibration transmission point on the digital model of the target auxiliary power unit through the actual working conditions and actual connection relationship of the target auxiliary power unit, and to perform random vibration testing with the vibration transmission point as the starting point during the subsequent life assessment. Through random vibration testing, the vibration speed and vibration stress corresponding to each first component during the test process can be obtained.

[0068] S140: Determine life information of the first component, where the life information reflects the relationship between the stress level and the material life.

[0069] S150: Determine a life assessment result of the first component in the target auxiliary power unit according to the life information, vibration velocity, and vibration stress of the first component.

[0070] The life information of the first component may be determined by determining a construction material of the first component and determining an SN curve of the construction material, wherein the SN curve reflects a relationship between a stress level and a material life.

[0071] After the vibration velocity and the vibration stress are obtained, the number of cycles experienced by the digital model of the first component during the test can be determined, and the SN curve can be used to determine whether damage will occur under the number of cycles experienced, thereby obtaining the final life assessment result.

[0072] By determining the life assessment result of the first component in the target auxiliary power unit according to the life information, vibration speed and vibration stress of the first component, the accuracy of the determined final life assessment result is ensured.

[0073] According to the technical solution of the embodiment of the present invention, by determining the target auxiliary power unit, generating a target auxiliary power unit digital model based on the target auxiliary power unit, and subsequently performing an overall test, the problem of large errors in the evaluation results when the existing analysis and evaluation method is directly applied to the finite element model of a single component is avoided; in addition, by determining the vibration transmission points on the digital model of the target auxiliary power unit, and taking the vibration transmission points as the starting points of random vibration, a random vibration test is performed on the digital model of the target auxiliary power unit to obtain the vibration speed and vibration stress corresponding to each first component, thereby reducing the error between the evaluation result of the life evaluation and the actual result; by determining the life evaluation result of the first component in the target auxiliary power unit based on the life information, vibration speed and vibration stress of the first component, the accuracy of the final life evaluation result determined is guaranteed.

[0074] Embodiment 2

[0075] Figure 2 The present invention provides a flowchart of another auxiliary power unit component life assessment method. Based on the above embodiment, this embodiment further optimizes the process of determining the life assessment result of the first component in the target auxiliary power unit according to the life information, vibration speed and vibration stress of the first component in the above embodiment. This embodiment can be combined with various optional solutions in one or more of the above embodiments. Figure 2 As shown, the auxiliary power unit component life assessment method of this embodiment may include the following steps:

[0076] S210, determining a target auxiliary power unit, and generating a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, which is a component requiring life assessment, and the digital model of the target auxiliary power unit includes a digital model of the first component, which is generated by modeling the first component.

[0077] S220. Determine a vibration transmission point on the digital model of the target auxiliary power unit, where the vibration transmission point is a starting point for performing a random vibration test on the target auxiliary power unit.

[0078] S230, taking the vibration transmission point as the random vibration starting point, performing a random vibration test on the target auxiliary power unit digital model to obtain the vibration speed and vibration stress corresponding to each first component.

[0079] S240: Determine life information of the first component, where the life information reflects the relationship between the stress level and the material life.

[0080] S250 : Determine an average frequency of random vibration of the first component based on the vibration velocity and the vibration stress.

[0081] S260: Determine the number of cycles experienced by the first component in the random vibration test according to the test time of the random vibration test and the average frequency of the random vibration.

[0082] S270: Determine the allowable number of cycles of the first component according to the life information of the first component.

[0083] S280. Determine a life assessment result of a first component in a target auxiliary power unit according to the number of experienced cycles and the number of allowed cycles.

[0084] After the vibration velocity and the vibration stress are obtained, the average frequency of random vibration of the first component is obtained by dividing the vibration velocity by the vibration stress. After the average frequency of random vibration is obtained, the number of cycles experienced by the first component during the random vibration test can be determined according to the test time of the random vibration test and the average frequency of random vibration.

[0085] At this time, the experienced cycle number and the allowed cycle number can be compared to determine whether the experienced cycle number is within the allowed cycle number, thereby determining the life assessment result of the first component in the target auxiliary power unit.

[0086] The random vibration average frequency of the first component is determined based on the vibration velocity and the vibration stress, and the number of cycles experienced by the first component in the random vibration test is determined according to the test time of the random vibration test and the average frequency of the random vibration. Finally, the life assessment result of the first component in the target auxiliary power unit is determined based on the number of experienced cycles and the allowable number of cycles, so that the final life assessment process is more accurate and clear.

[0087] In an optional solution, determining the life assessment result of the first component in the target auxiliary power unit according to the number of experienced cycles and the number of allowed cycles may include steps E1-E2:

[0088] Step E1: If the number of experienced cycles is less than the allowed number of cycles, the service life of the first component meets the preset service life.

[0089] Step E2: If the number of experienced cycles is greater than the allowed number of cycles, the service life of the first component does not meet the preset service life.

[0090] After obtaining the number of experienced cycles and the number of allowed cycles, the number of experienced cycles and the number of allowed cycles can be compared. When the number of experienced cycles is less than the number of allowed cycles, it indicates that the life of the first component does not meet the preset life, and it indicates that the first component may be damaged during use. When the number of experienced cycles is greater than the number of allowed cycles, it indicates that the life of the first component does not meet the preset life, and it indicates that the first component will not be damaged during use.

[0091] By comparing the number of experienced cycles with the number of allowed cycles, various situations that may occur during the actual use of the first component can be more clearly identified, thereby making the evaluation result clearer.

[0092] According to the technical solution of the embodiment of the present invention, the average frequency of random vibration of the first component is determined based on the vibration velocity and the vibration stress, and the number of cycles experienced by the first component in the random vibration test is determined according to the test time of the random vibration test and the average frequency of random vibration. Finally, the life assessment result of the first component in the target auxiliary power unit is determined according to the number of experienced cycles and the allowable number of cycles, so that the final life assessment process is more accurate and clear.

[0093] Embodiment 3

[0094] Figure 3 The present invention provides a structural block diagram of an auxiliary power unit component life assessment device, which can be applied to the situation of assessing at least one life component in an auxiliary power unit. The auxiliary power unit component life assessment device can be implemented in the form of hardware and / or software, and the auxiliary power unit component life assessment device can be configured in an electronic device with data processing capabilities. Figure 3 As shown, the auxiliary power unit component life assessment device of this embodiment may include: a digital model building module 310, a transmission point determination module 320, a vibration test module 330, a life information determination module 340 and an assessment result determination module 350. Among them:

[0095] The digital model building module 310 is used to determine a target auxiliary power unit and generate a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, which is a component that needs to be evaluated for life, and the digital model of the target auxiliary power unit includes a digital model of the first component, which is generated by modeling the first component;

[0096] The transmission point determination module 320 is used to determine the vibration transmission point on the digital model of the target auxiliary power unit, and the vibration transmission point is the starting point for performing a random vibration test on the target auxiliary power unit;

[0097] A vibration test module 330 is used to perform a random vibration test on the target auxiliary power unit digital model with the vibration transmission point as the random vibration starting point, and obtain the vibration speed and vibration stress corresponding to each first component;

[0098] A life information determination module 340 is used to determine the life information of the first component, where the life information reflects the relationship between the stress level and the material life;

[0099] The evaluation result determination module 350 is used to determine the life evaluation result of the first component in the target auxiliary power unit according to the life information, vibration speed and vibration stress of the first component.

[0100] Based on the above embodiment, optionally, the digital model building module 310 includes:

[0101] According to the target auxiliary power unit, a component digital model of each component in the target auxiliary power unit is established, and the component digital model is a detailed finite element digital model;

[0102] Determine at least one first component digital model, at least one second component digital model, and at least one third component digital model from the component digital models, wherein the second component digital model is a digital model constructed of a component having a load-bearing specific gravity greater than or equal to a preset specific gravity in the target auxiliary power unit, and the third component digital model is a digital model constructed of a component having a load-bearing specific gravity less than a preset specific gravity in the target auxiliary power unit;

[0103] Determine at least one digital model structural feature in the second component digital model and the third component digital model, and determine a target digital model structural feature from each digital model structural feature, the target digital model structural feature being a digital model structural feature whose influence on the stiffness of the component digital model is less than a preset influence;

[0104] Simplifying the structural features of the target digital model to obtain a fourth component digital model corresponding to the second component digital model and a fifth component digital model corresponding to the third component digital model;

[0105] A target auxiliary power unit digital model is obtained according to the fourth component digital model, the fifth component digital model and the first component digital model.

[0106] On the basis of the above embodiment, optionally, obtaining a target auxiliary power unit digital model according to the fourth component digital model, the fifth component digital model and the first component digital model includes:

[0107] The digital model of the fourth component is bound to the digital model of the fifth component by flange surfaces to obtain an initial target auxiliary power unit digital model;

[0108] The component digital model corresponding to the first component digital model in the initial target auxiliary power unit digital model is replaced by the first component digital model to obtain the target auxiliary power unit digital model.

[0109] On the basis of the above embodiment, optionally, the fourth component digital model and the fifth component digital model are flange-surface bound to obtain an initial target auxiliary power unit digital model, including:

[0110] Connecting the fourth component digital model with flange bolts to obtain the first target device component assembly digital model;

[0111] An initial target auxiliary power unit digital model is generated based on the first target device component group digital model and the fifth component digital model.

[0112] Based on the above embodiment, optionally, after generating the initial target auxiliary power unit digital model based on the first target device component group digital model and the fifth component digital model, the method further includes:

[0113] Determine the mass deviation and center of mass position deviation between the initial target auxiliary power unit digital model and the target auxiliary power unit;

[0114] If the mass deviation is greater than the first deviation threshold or the mass center position deviation is greater than the second deviation threshold, the initial target auxiliary power unit digital model is adjusted until the mass deviation is less than the first deviation threshold and the mass center position deviation is less than the second deviation threshold.

[0115] Based on the above embodiment, optionally, the evaluation result determination module 350 includes:

[0116] determining an average frequency of random vibration of the first component based on the vibration velocity and the vibration stress;

[0117] Determining the number of cycles experienced by the first component in the random vibration test according to the test time of the random vibration test and the average frequency of the random vibration;

[0118] Determining the allowable number of cycles of the first component according to the life information of the first component;

[0119] A life assessment result of a first component in a target auxiliary power unit is determined according to the number of experienced cycles and the number of allowable cycles.

[0120] Based on the above embodiment, optionally, determining the life assessment result of the first component in the target auxiliary power unit according to the number of experienced cycles and the number of allowed cycles includes:

[0121] If the number of experienced cycles is less than the allowed number of cycles, the service life of the first component meets the preset service life;

[0122] If the number of experienced cycles is greater than the allowed number of cycles, the service life of the first component does not meet the preset service life.

[0123] The auxiliary power unit component life assessment device provided in the embodiment of the present invention can execute the auxiliary power unit component life assessment method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0124] Embodiment 4

[0125] Figure 4 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0126] like Figure 4 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0127] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0128] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the auxiliary power unit component life assessment method.

[0129] In some embodiments, the auxiliary power unit component life assessment method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the auxiliary power unit component life assessment method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the auxiliary power unit component life assessment method in any other appropriate manner (e.g., by means of firmware).

[0130] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0131] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0132] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, 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 of the foregoing.

[0133] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0134] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0135] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0136] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0137] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for assessing the life of auxiliary power unit components, characterized in that: include: Determine a target auxiliary power unit, and generate a target auxiliary power unit digital model according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, the first component is a component that needs to be evaluated for life, and the target auxiliary power unit digital model includes a first component digital model, and the first component digital model is generated by modeling the first component; Determining a vibration transmission point on the digital model of the target auxiliary power unit, wherein the vibration transmission point is a starting point for performing a random vibration test on the target auxiliary power unit; Taking the vibration transmission point as a random vibration starting point, performing a random vibration test on the target auxiliary power unit digital model to obtain the vibration speed and vibration stress corresponding to each of the first components; Determining life information of the first component, wherein the life information reflects a relationship between a stress level and a material life; Determining a life assessment result of the first component in a target auxiliary power unit according to the life information, vibration velocity, and vibration stress of the first component; Wherein, generating a target auxiliary power unit digital model according to the target auxiliary power unit comprises: According to the target auxiliary power unit, a component digital model of each component in the target auxiliary power unit is established, wherein the component digital model is a detailed finite element digital model; Determine at least one first component digital model, at least one second component digital model and at least one third component digital model from the component digital models, wherein the second component digital model is a digital model constructed of a component having a load-bearing specific gravity greater than or equal to a preset specific gravity in the target auxiliary power unit, and the third component digital model is a digital model constructed of a component having a load-bearing specific gravity less than a preset specific gravity in the target auxiliary power unit; Determine at least one digital model structural feature in the second component digital model and the third component digital model, and determine a target digital model structural feature from each digital model structural feature, wherein the target digital model structural feature is a digital model structural feature whose influence on the stiffness of the component digital model is less than a preset influence; Simplifying the structural features of the target digital model to obtain a fourth component digital model corresponding to the second component digital model and a fifth component digital model corresponding to the third component digital model; A target auxiliary power unit digital model is obtained according to the fourth component digital model, the fifth component digital model and the first component digital model.

2. The method according to claim 1, characterized in that According to the fourth component digital model, the fifth component digital model and the first component digital model, a target auxiliary power unit digital model is obtained, including: Binding the fourth component digital model and the fifth component digital model by flange surface to obtain an initial target auxiliary power unit digital model; The component digital model corresponding to the first component digital model in the initial target auxiliary power unit digital model is replaced by the first component digital model to obtain the target auxiliary power unit digital model.

3. The method according to claim 2, characterized in that The fourth component digital model and the fifth component digital model are flange-bound to obtain an initial target auxiliary power unit digital model, including: Connecting the fourth component digital model with flange bolts to obtain a first target device component assembly digital model; An initial target auxiliary power unit digital model is generated based on the first target device component group digital model and the fifth component digital model.

4. The method according to claim 3, characterized in that After generating an initial target auxiliary power unit digital model based on the first target unit component assembly digital model and the fifth component digital model, the method further includes: Determining a mass deviation and a center of mass position deviation between the initial target auxiliary power unit digital model and the target auxiliary power unit; If the mass deviation is greater than a first deviation threshold or the mass center position deviation is greater than a second deviation threshold, the initial target auxiliary power unit digital model is adjusted until the mass deviation is less than the first deviation threshold and the mass center position deviation is less than the second deviation threshold.

5. The method according to claim 1, characterized in that Determining a life assessment result of the first component in a target auxiliary power unit according to the life information, vibration velocity, and vibration stress of the first component includes: determining an average frequency of random vibration of the first component based on the vibration velocity and the vibration stress; Determining the number of cycles experienced by the first component in the random vibration test according to the test time of the random vibration test and the average frequency of the random vibration; Determining the allowable number of cycles of the first component according to the life information of the first component; A life assessment result of the first component in the target auxiliary power unit is determined according to the experienced cycle number and the allowable cycle number.

6. The method according to claim 5, characterized in that Determining a life assessment result of the first component in a target auxiliary power unit according to the experienced cycle number and the allowable cycle number includes: If the number of experienced cycles is less than the allowed number of cycles, the service life of the first component meets the preset service life; If the experienced number of cycles is greater than the allowed number of cycles, the service life of the first component does not meet the preset service life.

7. An auxiliary power unit component life assessment device, characterized in that: include: a digital model building module, used for determining a target auxiliary power unit, and generating a digital model of the target auxiliary power unit according to the target auxiliary power unit, wherein the target auxiliary power unit includes a first component, the first component is a component that needs to be evaluated for life, and the digital model of the target auxiliary power unit includes a digital model of the first component, and the digital model of the first component is generated by modeling the first component; A transmission point determination module, used to determine the vibration transmission point on the digital model of the target auxiliary power unit, wherein the vibration transmission point is the starting point for performing a random vibration test on the target auxiliary power unit; A vibration test module, used to perform a random vibration test on the target auxiliary power unit digital model with the vibration transmission point as a random vibration starting point, and obtain the vibration speed and vibration stress corresponding to each of the first components; A life information determination module, used to determine the life information of the first component, wherein the life information reflects the relationship between the stress level and the material life; An evaluation result determination module, configured to determine a life evaluation result of the first component in a target auxiliary power unit according to the life information, vibration velocity, and vibration stress of the first component; Among them, the digital model building module is used to: According to the target auxiliary power unit, a component digital model of each component in the target auxiliary power unit is established, wherein the component digital model is a detailed finite element digital model; Determine at least one first component digital model, at least one second component digital model and at least one third component digital model from the component digital models, wherein the second component digital model is a digital model constructed of a component having a load-bearing specific gravity greater than or equal to a preset specific gravity in the target auxiliary power unit, and the third component digital model is a digital model constructed of a component having a load-bearing specific gravity less than a preset specific gravity in the target auxiliary power unit; Determine at least one digital model structural feature in the second component digital model and the third component digital model, and determine a target digital model structural feature from each digital model structural feature, wherein the target digital model structural feature is a digital model structural feature whose influence on the stiffness of the component digital model is less than a preset influence; Simplifying the structural features of the target digital model to obtain a fourth component digital model corresponding to the second component digital model and a fifth component digital model corresponding to the third component digital model; A target auxiliary power unit digital model is obtained according to the fourth component digital model, the fifth component digital model and the first component digital model.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the auxiliary power unit component life assessment method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the auxiliary power unit component life assessment method according to any one of claims 1 to 6 when executed.

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