Method, device and equipment for determining rigidity of transmission shell assembly and medium

Abstract

The invention discloses a rigidity determination method, device and equipment of a transmission shell assembly and a medium, and belongs to the technical field of computer-aided engineering.The method comprises the steps that on the basis of a three-dimensional geometric model of the transmission shell assembly, the rigidity of the transmission shell assembly is determined according to the analysis requirement of the transmission shell assembly; establishing a shell assembly finite element model corresponding to the transmission shell assembly; configuring the finite element model of the shell assembly to obtain a finite element calculation file; analyzing the finite element calculation file through a target solver selected by a demand side to obtain a rigidity analysis result of the transmission shell assembly; and determining whether the rigidity of the transmission shell assembly is qualified or not according to a rigidity analysis result. According to the method, physical tests are not needed, the research and development period of the transmission shell assembly is shortened, the material cost in the optimization design process of the transmission shell assembly is reduced, the reliability of the transmission shell assembly is guaranteed, and therefore the overall performance and reliability of a transmission are improved.

Description

Technical Field

[0001] The present invention relates to the field of computer-aided engineering technology, and in particular to a method, device, equipment and medium for determining the stiffness of a transmission housing assembly. Background Art

[0002] As the support of the automobile transmission system, the transmission housing bears the impact force from the engine and the vehicle during driving. It is very easy to cause local fracture failure due to insufficient rigidity, resulting in transmission function failure.

[0003] In the optimization design process of the transmission housing assembly, physical tests are usually performed to verify whether the stiffness of each housing in the transmission housing assembly is qualified. The test cycle is long, and if the stiffness of the housing is tested to be unqualified after trial production, the sample will be scrapped, and the test cost is high. Summary of the invention

[0004] The present invention provides a method, device, equipment and medium for determining the stiffness of a transmission housing assembly, so as to shorten the research and development cycle of the transmission housing assembly, reduce the material cost in the optimization design process of the transmission housing assembly, and ensure the reliability of the transmission housing assembly.

[0005] According to one aspect of the present invention, a method for determining the stiffness of a transmission housing assembly is provided, the method comprising:

[0006] Based on the three-dimensional geometric model of the transmission housing assembly and in accordance with the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established;

[0007] Configure the finite element model of the shell assembly to obtain the finite element calculation file;

[0008] The finite element calculation file is analyzed through the target solver selected by the demander to obtain the stiffness analysis results of the transmission housing assembly;

[0009] Based on the results of the stiffness analysis, determine whether the stiffness of the transmission case assembly is qualified.

[0010] According to another aspect of the present invention, there is provided a device for determining the stiffness of a transmission housing assembly, the device comprising:

[0011] A finite element model building module, which is used to build a case assembly finite element model corresponding to the transmission case assembly based on the three-dimensional geometric model of the transmission case assembly and according to the analysis requirements of the transmission case assembly;

[0012] A finite element calculation file determination module is used to configure the finite element model of the shell assembly to obtain a finite element calculation file;

[0013] A stiffness analysis result determination module is used to analyze the finite element calculation file through the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly;

[0014] The stiffness qualification determination module is used to determine whether the stiffness of the transmission housing assembly is qualified according to the stiffness analysis result.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] at least one processor; and

[0017] a memory communicatively connected to at least one processor; wherein,

[0018] The memory stores a computer program executable by at least one processor. The computer program is executed by at least one processor so that the at least one processor can execute the method for determining the stiffness of the transmission housing assembly according to any embodiment of the present invention.

[0019] 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 enabling a processor to implement the method for determining the stiffness of a transmission housing assembly according to any embodiment of the present invention when the computer instructions are executed.

[0020] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the method for determining the stiffness of a transmission housing assembly according to any embodiment of the present invention.

[0021] The technical solution of the embodiment of the present invention is based on the three-dimensional geometric model of the transmission housing assembly, and according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established; the housing assembly finite element model is configured to obtain a finite element calculation file; the finite element calculation file is analyzed by the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly; according to the stiffness analysis result, it is determined whether the stiffness of the transmission housing assembly is qualified. The above technical solution, in the optimization design stage of the transmission housing assembly, simulates the stress condition of the transmission housing assembly in actual working conditions through the finite element model, evaluates the stiffness performance of the transmission housing assembly, and guides designers to optimize the weak structure in the transmission housing assembly without relying on physical experiments, shortens the research and development cycle of the transmission housing assembly, reduces the material cost in the optimization design process of the transmission housing assembly, ensures the reliability of the transmission housing assembly, and thus improves the overall performance and reliability of the transmission.

[0022] 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

[0023] 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.

[0024] Figure 1 is a flow chart of a method for determining the stiffness of a transmission housing assembly provided according to a first embodiment of the present invention;

[0025] Figure 2 is a flow chart of a method for determining the stiffness of a transmission housing assembly provided according to a second embodiment of the present invention;

[0026] Figure 3 is a structural schematic diagram of a transmission housing assembly stiffness determination device provided according to a third embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of an electronic device for implementing the method for determining the stiffness of a transmission housing assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] 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.

[0029] It should be noted that the terms "first" and "second" and the like 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 thereof 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In addition, it should be noted that in the technical solution of the present invention, the collection, storage, use, processing, transmission, provision and disclosure of the three-dimensional geometric model of the transmission housing assembly, the coaxiality deviation threshold, the dynamic stiffness threshold, and the analysis requirements of the transmission housing assembly are in compliance with the relevant laws and regulations and do not violate public order and good morals.

[0031] Embodiment 1

[0032] Figure 1 This is a flow chart of a method for determining the stiffness of a transmission housing assembly provided in the first embodiment of the present invention. This embodiment can be used to guide designers to optimize the design of a transmission housing assembly. The method can be executed by a device for determining the stiffness of a transmission housing assembly. The device can be implemented in the form of hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0033] S101. Based on the three-dimensional geometric model of the transmission case assembly and in accordance with analysis requirements of the transmission case assembly, a case assembly finite element model corresponding to the transmission case assembly is established.

[0034] Among them, the transmission housing assembly is a general term for the housing structure used to install the transmission transmission mechanism and its accessories; optionally, the transmission housing assembly includes a transmission housing and a clutch housing. It should be noted that the transmission housing and the clutch housing are connected by bolts. The transmission housing includes a transmission front housing, a transmission middle housing and a transmission rear housing. The transmission front housing refers to the end of the transmission close to the engine, which is usually connected to the engine flywheel housing or the rear end of the crankshaft. The transmission rear housing refers to the end of the transmission away from the engine, which is usually connected to the drive shaft or drive axle; optionally, for a transmission with a differential, the transmission rear housing may also include a differential housing; wherein the differential housing is used to distribute power to the left and right drive wheels. The transmission middle housing refers to the intermediate housing used to connect the transmission front housing and the transmission rear housing, which can accommodate the shift mechanism and transmission gears and other components inside the transmission. The clutch housing refers to the outer shell that connects, supports and protects the clutch components.

[0035] The analysis requirements include static stiffness analysis requirements and dynamic stiffness analysis requirements. Static stiffness analysis requirements refer to the requirements for understanding the stiffness performance of the transmission housing assembly under static loads. Dynamic stiffness analysis requirements refer to the requirements for understanding the stiffness performance of the transmission housing assembly under dynamic loads.

[0036] Specifically, based on the three-dimensional geometric model of the transmission case assembly, all components in the transmission case assembly are imported into the finite element software, and a differentiated meshing strategy is adopted to mesh each component in the transmission case assembly; according to the static stiffness analysis requirements, by defining the contact relationship between the contacting parts in the transmission case assembly, each component in the transmission case assembly is assembled to obtain the static stiffness finite element model corresponding to the transmission case assembly; according to the dynamic stiffness analysis requirements, by rigidly connecting each bolt in the transmission case assembly, each component in the transmission case assembly is assembled to obtain the dynamic stiffness finite element model corresponding to the transmission case assembly.

[0037] It should be noted that the parts in the transmission housing assembly include but are not limited to the input shaft, output shaft, gears of each gear, bearings, synchronizers, oil pans, gear selectors, secondary shafts, intermediate shafts, reverse shafts, idler wheels, covers and bolts. Contacting parts refer to parts that are in contact with each other.

[0038] The finite element software may be pre-set according to actual business needs. For example, the finite element software may be ABAQUS software. In another example, the finite element software may be Hypermesh software.

[0039] Among them, a differentiated meshing strategy is adopted to mesh each component in the transmission housing assembly, which can be specifically: for the force transmission structure in the transmission housing assembly that does not pay attention to details, such as the second shaft, the intermediate shaft, the reverse shaft, the idler and the gears of each gear, etc., according to the overall stiffness and force transmission relationship of each force transmission structure, according to the equivalent principle, each force transmission structure is simplified to reduce the complexity of the model and improve the calculation efficiency; for the key components in the transmission housing assembly (such as the transmission front housing, the transmission middle housing, the transmission rear housing and the bearing, etc.) and the finite element mesh of the contact parts of the components, the finite element mesh is finely divided, and at least the number of chamfer mesh layers and the number of fillet mesh layers are not less than three layers, so as to ensure that there is sufficient mesh density in the stress concentration areas such as chamfers and fillets, and at least two rows of finite element mesh units are in contact; for the finite element mesh of non-key components in the transmission housing assembly, the finite element mesh is roughly divided. It should be noted that in the meshing process, the mesh of the outer ring of the bearing in contact with the bearing hole of the transmission housing should be consistent with the mesh of the bearing hole of the transmission housing.

[0040] It can be understood that according to the structural characteristics and engineering requirements of different components in the transmission housing assembly, a differentiated meshing strategy is adopted to mesh the various components in the transmission housing assembly, which can optimize the simulation accuracy and improve the calculation efficiency.

[0041] It can be understood that based on the three-dimensional geometric model of the transmission case assembly, a case assembly finite element model corresponding to the transmission case assembly is established in accordance with the static stiffness analysis requirements and dynamic stiffness analysis requirements of the transmission case assembly, so that the established case assembly finite element model can perform a more comprehensive evaluation of the stiffness of the transmission case assembly from the two perspectives of static stiffness and dynamic stiffness.

[0042] S102. Configure the finite element model of the shell assembly to obtain a finite element calculation file.

[0043] Among them, the finite element calculation file refers to the data file used to store and execute calculations in the finite element software.

[0044] Specifically, the finite element model of the housing assembly can be configured according to the design requirements of the transmission housing assembly through the finite element model configuration interface in the finite element software, and after the model configuration is completed, the finite element calculation file is automatically generated through the finite element software.

[0045] S103. Analyze the finite element calculation file through the target solver selected by the demander to obtain the stiffness analysis result of the transmission case assembly.

[0046] The target solver refers to the solver actually used to analyze the finite element calculation file. The demander refers to the party who wants to understand the stiffness performance of the transmission housing assembly, for example, the demander can be the designers of the transmission housing.

[0047] Specifically, the demander can select a required solver from multiple solvers provided by the finite element software as the target solver; then, the target solver is used to analyze the finite element calculation file to obtain the stiffness analysis result of the transmission case assembly.

[0048] S104. Determine whether the stiffness of the transmission case assembly is qualified based on the stiffness analysis result.

[0049] Specifically, the stiffness analysis results can be input into a pre-trained stiffness qualification detection model, and after being processed by the stiffness qualification detection model, the result of whether the stiffness of the transmission housing assembly is qualified is output. The stiffness qualification detection model can be obtained by training a machine learning model through sample stiffness analysis results.

[0050] The technical solution of the embodiment of the present invention is based on the three-dimensional geometric model of the transmission housing assembly, and according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established; the housing assembly finite element model is configured to obtain a finite element calculation file; the finite element calculation file is analyzed by the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly; according to the stiffness analysis result, it is determined whether the stiffness of the transmission housing assembly is qualified. The above technical solution, in the optimization design stage of the transmission housing assembly, simulates the stress condition of the transmission housing assembly in actual working conditions through the finite element model, evaluates the stiffness performance of the transmission housing assembly, and guides designers to optimize the weak structure in the transmission housing assembly without relying on physical experiments, shortens the research and development cycle of the transmission housing assembly, reduces the material cost in the optimization design process of the transmission housing assembly, ensures the reliability of the transmission housing assembly, and thus improves the overall performance and reliability of the transmission.

[0051] Embodiment 2

[0052] Figure 2 This is a flow chart of a method for determining the stiffness of a transmission housing assembly provided in Example 2 of the present invention. Based on the above example, this example further optimizes the "configuration of the housing assembly finite element model" and provides an optional implementation scheme. It should be noted that for the parts not described in detail in the example of the present invention, reference can be made to the relevant descriptions of other examples. Figure 2 As shown, the method includes:

[0053] S201. Based on the three-dimensional geometric model of the transmission case assembly and in accordance with analysis requirements of the transmission case assembly, a case assembly finite element model corresponding to the transmission case assembly is established.

[0054] Among them, the shell assembly finite element model includes a static stiffness finite element model and a dynamic stiffness finite element model.

[0055] S202. Define the material properties of each component in the finite element model of the shell assembly.

[0056] Among them, material properties refer to the characteristics and properties of the material; optionally, material properties include but are not limited to elastic modulus, Poisson's ratio, density, tensile strength, yield strength and SN curve. Among them, elastic modulus is a physical quantity that describes the relationship between stress and strain of the material in the elastic deformation stage. It reflects the ability of the material to resist elastic deformation and is a measure of the stiffness of the material. Poisson's ratio describes the ratio of lateral contraction or expansion of the material when it is stretched or compressed. Density is the ratio of the mass of the material to its volume, which reflects the compactness and mass distribution of the material. Tensile strength is the ratio of the maximum tensile force that the material can withstand in a tensile test to the original cross-sectional area of ​​the specimen, which reflects the ability of the material to resist tensile damage. Yield strength is the minimum stress value at which the material begins to undergo plastic deformation when subjected to external force, which reflects the ability of the material to resist plastic deformation. The SN curve is also called the stress-life curve. It takes the fatigue strength of the standard specimen of the material as the ordinate and the logarithm of the fatigue life lgN as the abscissa. It is a curve that represents the relationship between the fatigue strength and fatigue life of the standard specimen under certain cycle characteristics.

[0057] Specifically, for each component in the housing assembly finite element model, the material properties of the component are defined according to the physical properties, chemical properties and mechanical properties of the component material and in combination with actual business needs. For example, the clutch housing in the housing assembly finite element model is made of aluminum alloy with an elastic modulus of 71,000 MPa and a Poisson's ratio of 0.33; the transmission housing is made of aluminum with an elastic modulus of 74,000 MPa and a Poisson's ratio of 0.3; the gear shaft, gears, bolts and bearings are made of steel with an elastic modulus of 210,000 MPa and a Poisson's ratio of 0.3.

[0058] S203. Determine boundary constraints and applied loads of the shell assembly finite element model.

[0059] Specifically, according to the power transmission path of the housing in the transmission housing assembly, the excitation source of each housing in the dynamic stiffness finite element model can be determined, and the excitation force applied to each housing can be determined; for each gear in the static stiffness finite element model, the rotational freedom of the gear shaft applied between the gear and the bearings on both sides of the gear can be determined, and the load applied to the gear meshing point of the gear can be determined.

[0060] More specifically, for each housing in the transmission housing assembly, according to the power transmission path of the housing, the bearing hole in the housing that bears the largest load and deformation is used as the excitation source of the housing; and the excitation force applied to the excitation source of the housing is determined according to the preset amplitude and the frequency value of the preset frequency point; wherein the preset amplitude can be pre-set according to actual business needs, for example, the preset amplitude can be 1 Newton (i.e., 1N), and the embodiment of the present invention does not specifically limit it. The preset frequency point can be determined according to the frequency range and the frequency step. For example, within the frequency range of 0 Hz (i.e., 0Hz) to 1000Hz, with a frequency step of 2Hz, 501 preset frequency points can be determined.

[0061] Optionally, in order to more accurately simulate the dynamic behavior of the transmission case assembly under actual working conditions, the damping in the dynamic stiffness finite element model is set according to the dynamic stiffness analysis requirements and the functions of the finite element software. For example, the damping in the dynamic stiffness finite element model is set to direct modal damping.

[0062] At the same time, for each gear in the static stiffness finite element model, the gear shaft rotational freedom applied between the gear and the bearings on both sides of the gear is determined according to the support method and installation configuration of the bearing, and the gear shaft rotational freedom constraint is applied through the RBE3 unit in the finite element software; at the same time, the equivalent gear force corresponding to the gear is used as the load applied to the gear meshing point of the gear.

[0063] It can be understood that by defining the material properties of each component in the finite element model of the housing assembly, determining the boundary constraints and applied loads of the finite element model of the housing assembly, the finite element model of the housing assembly can better reflect the stress state and deformation of the transmission housing assembly under actual working conditions, thereby ensuring the certainty of solving the problem and improving the accuracy and reliability of the finite element model of the housing assembly.

[0064] S204: Generate finite element calculation files.

[0065] Specifically, after the finite element model of the shell assembly is configured, a finite element calculation file is automatically generated by the finite element software.

[0066] S205. Analyze the finite element calculation file through the target solver selected by the demander to obtain the stiffness analysis result of the transmission case assembly.

[0067] S206. Determine whether the stiffness of the transmission case assembly is qualified based on the stiffness analysis result.

[0068] The stiffness analysis results include displacement and acceleration frequency response curves at the bearing holes at both ends of each gear shaft. The displacement at the bearing hole includes a first displacement in the x-axis direction and a second displacement in the y-axis direction.

[0069] Specifically, the coaxiality deviation corresponding to the bearing holes at both ends of the gear shaft can be determined according to the displacement at the bearing holes at both ends of the gear shaft; the minimum dynamic stiffness at the bearing holes at both ends of the gear shaft can be determined according to the acceleration frequency response curves at the bearing holes at both ends of the gear shaft; if the coaxiality deviation corresponding to the bearing holes at both ends of each gear shaft is less than the coaxiality deviation threshold, and the minimum dynamic stiffness at the bearing holes at both ends of each gear shaft is greater than the dynamic stiffness threshold, then it is determined that the stiffness of the transmission case assembly is qualified; otherwise, it is determined that the stiffness of the transmission case assembly is unqualified.

[0070] Among them, the coaxiality deviation threshold and the dynamic stiffness threshold can be preset according to actual business needs or experimental experience, and the embodiments of the present invention do not specifically limit them.

[0071] More specifically, for each gear shaft in the transmission housing assembly, according to the first displacement of the left end bearing hole of the gear shaft and the contact surface node of the bearing outer ring in the x-axis direction and the second displacement in the y-axis direction, and the first displacement of the right end bearing hole of the gear shaft and the contact surface node of the bearing outer ring in the x-axis direction and the second displacement in the y-axis direction, the coaxiality deviation corresponding to the bearing holes at both ends of the gear shaft is determined by the following formula:

[0072]

[0073] Among them, Δφ represents the coaxiality deviation corresponding to the bearing holes at both ends of the gear shaft, U1 represents the first displacement of the node of the left bearing hole of the gear shaft and the contact surface of the bearing outer ring in the x-axis direction, U2 represents the second displacement of the node of the left bearing hole of the gear shaft and the contact surface of the bearing outer ring in the y-axis direction, u1 represents the first displacement of the node of the right bearing hole of the gear shaft and the contact surface of the bearing outer ring in the x-axis direction, and u2 represents the second displacement of the node of the right bearing hole of the gear shaft and the contact surface of the bearing outer ring in the y-axis direction. Thus, the coaxiality deviation corresponding to the bearing holes at both ends of each gear shaft can be obtained.

[0074] Afterwards, for the bearing hole at either end of the gear shaft, according to the acceleration frequency response curve at the bearing hole, based on the following acceleration response and dynamic stiffness relationship model, the dynamic stiffness frequency response curve at the bearing hole can be obtained; the dynamic stiffness at the lowest point of the dynamic stiffness frequency response curve is taken as the minimum dynamic stiffness at the bearing hole:

[0075]

[0076] Among them, K arepresents dynamic stiffness, f represents acceleration frequency, I PI It represents the ratio of acceleration response to excitation force. It should be noted that the acceleration frequency response curve at the bearing hole can reflect the relationship between acceleration response, acceleration frequency and excitation force. Thus, the minimum dynamic stiffness at the left end bearing hole of the gear shaft and the minimum dynamic stiffness at the right end bearing hole can be obtained, and then the minimum dynamic stiffness at the left end bearing hole of each gear shaft and the minimum dynamic stiffness at the right end bearing hole of each gear shaft can be obtained.

[0077] Afterwards, the coaxiality deviation corresponding to the bearing holes at both ends of each gear shaft is compared with the coaxiality deviation threshold; the minimum dynamic stiffness at the bearing hole at the left end of each gear shaft is compared with the dynamic stiffness threshold; the minimum dynamic stiffness at the bearing hole at the right end of each gear shaft is compared with the dynamic stiffness threshold; if the coaxiality deviation corresponding to the bearing holes at both ends of each gear shaft is less than the coaxiality deviation threshold, and the minimum dynamic stiffness at the bearing holes at the left and right ends of each gear shaft is greater than the dynamic stiffness threshold, then it is determined that the stiffness of the transmission case assembly is qualified; otherwise, it is determined that the stiffness of the transmission case assembly is unqualified.

[0078] The technical solution of the embodiment of the present invention is based on the three-dimensional geometric model of the transmission housing assembly, and according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established; the material properties of each component in the housing assembly finite element model are defined; the boundary constraints and applied loads of the housing assembly finite element model are determined; a finite element calculation file is generated; the finite element calculation file is analyzed through the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly; and according to the stiffness analysis result, whether the stiffness of the transmission housing assembly is qualified is determined. The above technical solution, in the optimization design stage of the transmission housing assembly, simulates the stress condition of the transmission housing assembly in the actual working condition through the finite element model, evaluates the stiffness performance of the transmission housing assembly, and guides designers to optimize the weak structure in the transmission housing assembly without relying on physical experiments, shortens the research and development cycle of the transmission housing assembly, reduces the material cost in the optimization design process of the transmission housing assembly, ensures the reliability of the transmission housing assembly, and thus improves the overall performance and reliability of the transmission.

[0079] Embodiment 3

[0080] Figure 3 This is a schematic diagram of the structure of a transmission housing assembly stiffness determination device provided in the third embodiment of the present invention. This embodiment can be used to guide designers to optimize the design of the transmission housing assembly. The device can be implemented in the form of hardware and / or software and can be configured in an electronic device. Figure 3 As shown, the device comprises:

[0081] The finite element model building module 301 is used to build a housing assembly finite element model corresponding to the transmission housing assembly based on the three-dimensional geometric model of the transmission housing assembly and according to the analysis requirements of the transmission housing assembly;

[0082] The finite element calculation file determination module 302 is used to configure the finite element model of the housing assembly to obtain a finite element calculation file;

[0083] The stiffness analysis result determination module 303 is used to analyze the finite element calculation file through the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly;

[0084] The stiffness qualification determination module 304 is used to determine whether the stiffness of the transmission housing assembly is qualified according to the stiffness analysis result.

[0085] The technical solution of the embodiment of the present invention is based on the three-dimensional geometric model of the transmission housing assembly, and according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established; the housing assembly finite element model is configured to obtain a finite element calculation file; the finite element calculation file is analyzed by the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly; according to the stiffness analysis result, it is determined whether the stiffness of the transmission housing assembly is qualified. The above technical solution, in the optimization design stage of the transmission housing assembly, simulates the stress condition of the transmission housing assembly in actual working conditions through the finite element model, evaluates the stiffness performance of the transmission housing assembly, and guides designers to optimize the weak structure in the transmission housing assembly without relying on physical experiments, shortens the research and development cycle of the transmission housing assembly, reduces the material cost in the optimization design process of the transmission housing assembly, ensures the reliability of the transmission housing assembly, and thus improves the overall performance and reliability of the transmission.

[0086] Optionally, the analysis requirements include static stiffness analysis requirements and dynamic stiffness analysis requirements;

[0087] The finite element model building module 301 is specifically used for:

[0088] Based on the 3D geometric model of the transmission case assembly, all the components in the transmission case assembly are imported into the finite element software, and the differentiated meshing strategy is used to mesh the components in the transmission case assembly.

[0089] According to the requirements of static stiffness analysis, by defining the contact relationship between the contacting parts in the transmission case assembly, the various parts in the transmission case assembly are assembled to obtain the static stiffness finite element model corresponding to the transmission case assembly;

[0090] According to the dynamic stiffness analysis requirements, the bolts in the transmission case assembly are rigidly connected and the components in the transmission case assembly are assembled to obtain the dynamic stiffness finite element model corresponding to the transmission case assembly.

[0091] Optionally, the finite element calculation file determination module 302 includes:

[0092] Material property definition unit, used to define the material properties of each component in the finite element model of the shell assembly;

[0093] The boundary constraint condition and load determination unit is used to determine the boundary constraint conditions and applied loads of the shell assembly finite element model.

[0094] Optionally, the shell assembly finite element model includes a static stiffness finite element model and a dynamic stiffness finite element model;

[0095] Boundary constraints and load determination elements are used to:

[0096] According to the power transmission path of the housing in the transmission housing assembly, determine the excitation source of each housing in the dynamic stiffness finite element model, and determine the excitation force applied to each housing;

[0097] For each gear in the static stiffness finite element model, determine the gear shaft rotational freedom applied between the gear and the bearings on both sides of the gear, and determine the load applied to the gear meshing point of the gear.

[0098] Optionally, the stiffness analysis results include displacement and acceleration frequency response curves at the bearing holes at both ends of each gear shaft.

[0099] Optionally, the stiffness qualification determination module 304 is specifically used to:

[0100] According to the displacement of the bearing holes at both ends of the gear shaft, determine the coaxiality deviation corresponding to the bearing holes at both ends of the gear shaft;

[0101] According to the acceleration frequency response curves at the bearing holes at both ends of the gear shaft, the minimum dynamic stiffness at the bearing holes at both ends of the gear shaft is determined;

[0102] If the coaxiality deviations corresponding to the bearing holes at both ends of each gear shaft are less than the coaxiality deviation threshold, and the minimum dynamic stiffness at the bearing holes at both ends of each gear shaft are greater than the dynamic stiffness threshold, it is determined that the stiffness of the transmission housing assembly is qualified;

[0103] Otherwise, it is determined that the rigidity of the transmission case assembly is unqualified.

[0104] Optionally, the transmission housing assembly includes a transmission housing and a clutch housing.

[0105] The stiffness determination device for a transmission housing assembly provided in an embodiment of the present invention can execute the stiffness determination method for a transmission housing assembly provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to executing each stiffness determination method for a transmission housing assembly.

[0106] According to an embodiment of the present invention, the present invention also provides an electronic device, a readable storage medium and a computer program product.

[0107] Embodiment 4

[0108] 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.

[0109] 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, ROM 12 and 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.

[0110] 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.

[0111] The processor 11 may be a variety of general and / or dedicated 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 dedicated 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 a method for determining the stiffness of a transmission housing assembly.

[0112] In some embodiments, the method for determining the stiffness of the transmission housing assembly 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 method for determining the stiffness of the transmission housing assembly described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the method for determining the stiffness of the transmission housing assembly in any other appropriate manner (e.g., by means of firmware).

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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).

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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 determining the stiffness of a transmission housing assembly, characterized in that: include: Based on the three-dimensional geometric model of the transmission housing assembly and according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established; Configuring the shell assembly finite element model to obtain a finite element calculation file; Analyzing the finite element calculation file by using the target solver selected by the demander to obtain the stiffness analysis result of the transmission housing assembly; According to the stiffness analysis result, it is determined whether the stiffness of the transmission housing assembly is qualified.

2. The method according to claim 1, characterized in that The analysis requirements include static stiffness analysis requirements and dynamic stiffness analysis requirements; Based on the three-dimensional geometric model of the transmission housing assembly, according to the analysis requirements of the transmission housing assembly, a housing assembly finite element model corresponding to the transmission housing assembly is established, including: Based on the three-dimensional geometric model of the transmission housing assembly, all the components of the transmission housing assembly are imported into the finite element software, and a differentiated meshing strategy is adopted to mesh the components of the transmission housing assembly; According to the static stiffness analysis requirements, by defining the contact relationship between the contacting parts in the transmission housing assembly, assembling the components in the transmission housing assembly, and obtaining a static stiffness finite element model corresponding to the transmission housing assembly; According to the dynamic stiffness analysis requirements, the bolts in the transmission case assembly are rigidly connected and the components in the transmission case assembly are assembled to obtain a dynamic stiffness finite element model corresponding to the transmission case assembly.

3. The method according to claim 1, characterized in that The finite element model of the housing assembly is configured, including: Defining material properties of each component in the finite element model of the housing assembly; Boundary constraints and applied loads of the shell assembly finite element model are determined.

4. The method according to claim 3, characterized in that The shell assembly finite element model includes a static stiffness finite element model and a dynamic stiffness finite element model; Determining the boundary constraint conditions and applied loads of the shell assembly finite element model includes: Determining the excitation source of each housing in the dynamic stiffness finite element model according to the power transmission path of the housing in the transmission housing assembly, and determining the excitation force applied to each housing; For each gear in the static stiffness finite element model, the rotational freedom of the gear shaft applied between the gear and the bearings on both sides of the gear is determined, and the load applied to the gear meshing point of the gear is determined.

5. The method according to claim 1, characterized in that The stiffness analysis results include displacement and acceleration frequency response curves at the bearing holes at both ends of each gear shaft.

6. The method according to claim 5, characterized in that Determining whether the stiffness of the transmission housing assembly is qualified according to the stiffness analysis result includes: Determine the coaxiality deviation of the bearing holes at both ends of the gear shaft according to the displacement of the bearing holes at both ends of the gear shaft; Determine the minimum dynamic stiffness of the bearing holes at both ends of the gear shaft according to the acceleration frequency response curves at the bearing holes at both ends of the gear shaft; If the coaxiality deviations corresponding to the bearing holes at both ends of each gear shaft are less than the coaxiality deviation threshold, and the minimum dynamic stiffness at the bearing holes at both ends of each gear shaft are greater than the dynamic stiffness threshold, it is determined that the stiffness of the transmission housing assembly is qualified; Otherwise, it is determined that the rigidity of the transmission housing assembly is unqualified.

7. The method according to claim 1, characterized in that The transmission housing assembly includes a transmission housing and a clutch housing.

8. A device for determining the stiffness of a transmission housing assembly, characterized in that: include: A finite element model building module, used to build a housing assembly finite element model corresponding to the transmission housing assembly based on the three-dimensional geometric model of the transmission housing assembly and according to the analysis requirements of the transmission housing assembly; A finite element calculation file determination module, used to configure the finite element model of the housing assembly to obtain a finite element calculation file; A stiffness analysis result determination module, used to analyze the finite element calculation file through a target solver selected by the demander to obtain a stiffness analysis result of the transmission housing assembly; The stiffness qualification determination module is used to determine whether the stiffness of the transmission housing assembly is qualified according to the stiffness analysis result.

9. The device according to claim 8, characterized in that The analysis requirements include static stiffness analysis requirements and dynamic stiffness analysis requirements; The finite element model building module is specifically used for: Based on the three-dimensional geometric model of the transmission housing assembly, all the components of the transmission housing assembly are imported into the finite element software, and a differentiated meshing strategy is adopted to mesh the components of the transmission housing assembly; According to the static stiffness analysis requirements, by defining the contact relationship between the contacting parts in the transmission housing assembly, assembling the components in the transmission housing assembly, and obtaining a static stiffness finite element model corresponding to the transmission housing assembly; According to the dynamic stiffness analysis requirements, the bolts in the transmission case assembly are rigidly connected and the components in the transmission case assembly are assembled to obtain a dynamic stiffness finite element model corresponding to the transmission case assembly.

10. The device according to claim 8, characterized in that The finite element calculation file determination module includes: A material property definition unit, used to define the material properties of each component in the finite element model of the housing assembly; The boundary constraint condition and load determination unit is used to determine the boundary constraint conditions and applied loads of the shell assembly finite element model.

11. The device according to claim 10, characterized in that The shell assembly finite element model includes a static stiffness finite element model and a dynamic stiffness finite element model; The boundary constraint condition and load determination unit is specifically used for: Determining the excitation source of each housing in the dynamic stiffness finite element model according to the power transmission path of the housing in the transmission housing assembly, and determining the excitation force applied to each housing; For each gear in the static stiffness finite element model, the rotational freedom of the gear shaft applied between the gear and the bearings on both sides of the gear is determined, and the load applied to the gear meshing point of the gear is determined.

12. The device according to claim 8, characterized in that The stiffness analysis results include displacement and acceleration frequency response curves at the bearing holes at both ends of each gear shaft.

13. The device according to claim 12, characterized in that The stiffness qualification determination module is specifically used for: Determine the coaxiality deviation of the bearing holes at both ends of the gear shaft according to the displacement of the bearing holes at both ends of the gear shaft; Determine the minimum dynamic stiffness of the bearing holes at both ends of the gear shaft according to the acceleration frequency response curves at the bearing holes at both ends of the gear shaft; If the coaxiality deviations corresponding to the bearing holes at both ends of each gear shaft are less than the coaxiality deviation threshold, and the minimum dynamic stiffness at the bearing holes at both ends of each gear shaft are greater than the dynamic stiffness threshold, it is determined that the stiffness of the transmission housing assembly is qualified; Otherwise, it is determined that the rigidity of the transmission housing assembly is unqualified.

14. 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, wherein the computer program is executed by the at least one processor so as to enable the at least one processor to perform the method for determining the stiffness of the transmission housing assembly according to any one of claims 1 to 7.

15. 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 method for determining the stiffness of the transmission housing assembly according to any one of claims 1 to 7 when executed. 16 . A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method for determining the stiffness of a transmission housing assembly according to any one of claims 1 to 7.

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