Rotating shaft modal calculation method and device in multi-bearing supporting mode, electronic equipment and storage medium

Abstract

The invention provides a rotating shaft modal calculation method and device in a multi-bearing supporting mode, electronic equipment and a storage medium, and the method comprises the steps: constructing a one-dimensional simulation model of a gear system; input parameters of the gear system one-dimensional simulation model are determined, and the input parameters of the gear system one-dimensional simulation model comprise real working condition data of a bearing connected with a rotating shaft and gearbox shell parameters; performing system deformation analysis based on the gear system one-dimensional simulation model to obtain the direction connection rigidity of the bearing; the modal of the rotating shaft is calculated based on the three-dimensional finite element model of the rotating shaft, in the three-dimensional finite element model of the rotating shaft, rigid connection is adopted in the connecting position of the bearing, and the other side of the rigid connection is connected with a one-dimensional connection unit; the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. The rotating shaft modal can be calculated based on the real working condition data of the bearing, and then the accuracy of rotating shaft modal calculation can be improved.

Description

Technical Field

[0001] The present application relates to the field of bearing simulation analysis, and more specifically, to a method, device, electronic device and storage medium for calculating the modal state of a rotating shaft in a multi-bearing support manner. Background Art

[0002] In the prior art, modal calculation of a rotating shaft supported by multiple bearings is usually performed using a finite element method, in which the bearing supports are fixed with rigid connections to extract the modal characteristics of the rotating shaft.

[0003] However, the prior art is unable to consider the real-time working conditions and the actual support state of the bearing, and therefore has the defect of inaccurate modal calculation of the rotating shaft. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method, device, electronic device and storage medium for calculating the modal of a rotating shaft with multi-bearing support, so as to at least improve the calculation accuracy of the modal of the rotating shaft.

[0005] In a first aspect, the present invention provides a method for calculating the modal state of a rotating shaft in a multi-bearing support mode, the method comprising:

[0006] Construct a one-dimensional simulation model of the gear system;

[0007] Determining input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include actual working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing;

[0008] Performing system deformation analysis based on a one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing;

[0009] The modes of the rotating shaft are calculated based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, a rigid connection is adopted at the connection of the bearing, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

[0010] In the first aspect of the present application, a one-dimensional simulation model of a gear system is constructed and input parameters of the one-dimensional simulation model of the gear system are determined, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the parameters of the gearbox housing, and then a system deformation analysis can be performed based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then the rotating shaft mode can be calculated based on the three-dimensional finite element model of the rotating shaft, wherein in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs a system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by the one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode.

[0011] In an optional embodiment, the method comprises:

[0012] A gearbox housing finite element model is established, and housing parameters are determined based on the gearbox housing finite element model, wherein the housing parameters include housing stiffness and mass matrix.

[0013] This optional implementation can establish a finite element model of the gearbox housing, and determine housing parameters based on the gearbox housing finite element model, wherein the housing parameters include housing stiffness and mass matrix.

[0014] In an optional embodiment, determining the housing parameters based on the gearbox housing finite element model includes:

[0015] Based on the gearbox housing finite element model, constraint modes of order 10 or above are extracted to obtain the housing parameters.

[0016] This optional implementation can extract constraint modes of order 10 or above based on the gearbox housing finite element model to obtain the housing parameters.

[0017] In an optional embodiment, the actual operating data of the bearing includes at least bearing temperature, bearing clearance, bearing preload, rotational speed and torque input.

[0018] This optional implementation may determine the actual operating data of the bearing based on bearing temperature, bearing clearance, bearing preload, rotational speed and torque input.

[0019] In an optional embodiment, the directional connection stiffness of the bearing includes the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0020] This optional implementation may use the axial stiffness of the bearing in the radial direction, the axial stiffness of the bearing in the axial direction, and the torsional stiffness of the bearing in the radial direction as the directional connection stiffness of the bearing.

[0021] In an optional embodiment, the one-dimensional connection unit has six-directional stiffness, wherein five of the stiffnesses of the one-dimensional connection unit are determined based on the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0022] This optional implementation may determine five-way stiffness of the one-dimensional connection unit based on the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0023] In an optional implementation, the axial torque stiffness of the one-dimensional connection unit is zero, and the axial torque stiffness of the one-dimensional connection unit and the other five-directional stiffnesses of the one-dimensional connection unit constitute the six-directional stiffness of the one-dimensional connection unit.

[0024] This optional implementation may set the axial torque stiffness of the one-dimensional connection unit to zero.

[0025] In a second aspect, the present invention provides a modal calculation device for a rotating shaft in a multi-bearing support mode, the device comprising:

[0026] A building module for building a one-dimensional simulation model of a gear system;

[0027] A determination module, used to determine input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include real working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing;

[0028] A first simulation calculation module is used to perform system deformation analysis based on a one-dimensional simulation model of the gear system to obtain a directional connection stiffness of the bearing;

[0029] The second simulation calculation module is used to calculate the mode of the rotating shaft based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

[0030] The device of the second aspect of the present application constructs a one-dimensional simulation model of a gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by the one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode.

[0031] In a third aspect, the present invention provides an electronic device, comprising:

[0032] Processor; and

[0033] The memory is configured to store machine-readable instructions, and when the instructions are executed by the processor, the modal calculation method of the rotating shaft in the multi-bearing support mode as described in any one of the aforementioned embodiments is executed.

[0034] The electronic device of the third aspect of the present application constructs a one-dimensional simulation model of a gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by the one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will lead to the complication of the pre-processing steps of the rotating shaft mode and the amount of calculation of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode. In a fourth aspect, the present invention provides a storage medium, the storage medium stores a computer program, and the computer program is executed by a processor as a rotating shaft modal calculation method of a multi-bearing support method as described in any of the aforementioned embodiments.

[0035] The storage medium of the fourth aspect of the present application constructs a one-dimensional simulation model of a gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by the one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a flow chart of a method for calculating a modal state of a rotating shaft in a multi-bearing support mode disclosed in an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the change in connection stiffness of a deep groove ball bearing under different torque conditions disclosed in an embodiment of the present application;

[0039] Figure 3 It is a structural schematic diagram of a rotating shaft modal calculation device with a multi-bearing support method disclosed in an embodiment of the present application;

[0040] Figure 4 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] Embodiment 1

[0043] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of a method for calculating the modal state of a rotating shaft in a multi-bearing support mode disclosed in an embodiment of the present application. Figure 1 As shown, the method of the embodiment of the present application includes the following steps:

[0044] 101. Construct a one-dimensional simulation model of the gear system;

[0045] 102. Determine input parameters of a one-dimensional simulation model of a gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include actual working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing;

[0046] 103. Perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing;

[0047] 104. The modes of the rotating shaft are calculated based on the three-dimensional finite element model of the rotating shaft, wherein in the three-dimensional finite element model of the rotating shaft, a rigid connection is adopted at the connection of the bearing, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

[0048] The embodiment of the present application constructs a one-dimensional simulation model of the gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the connection of the bearing is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by a one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode.

[0049] In the embodiment of the present application, the directional connection stiffness of the bearing is related to the actual working condition data of the bearing, for example, see Figure 2 , Figure 2 Schematic diagram of the change of connection stiffness of a deep groove ball bearing under different torque conditions disclosed in the embodiment of the present application. Figure 2 As shown, the five-directional connection stiffness Kx, Ky, Kz, Krx and Kry of the deep groove ball bearing have different values ​​in the working conditions of 40Nm torque, 80Nm torque, 120Nm torque and 160Nm respectively.

[0050] In the embodiment of the present application, the one-dimensional simulation model of the gear system is based on the mechanical characteristics and motion laws of the gear system. By simplifying the geometric shape and physical properties of the system, it is abstracted into a combination of one or multiple one-dimensional chains.

[0051] In the embodiment of the present application, Romax, Masta, and Kisssoft can be used to perform system deformation analysis on the one-dimensional simulation model of the gear system.

[0052] In the embodiment of the present application, the directional connection stiffness of the bearing refers to the stiffness characteristics of the bearing in different directions.

[0053] In the embodiment of the present application, the three-dimensional finite element model of the rotating shaft can be constructed based on software such as ANSYS, Abaqus, SolidWorksSimulation, etc.

[0054] In the embodiment of the present application, the one-dimensional connection unit is a special unit type in the finite element analysis, which is used to simulate the bearing and transmission of axial force, bending moment, and torque at the bearing connection. Compared with the prior art that uses the finite element model of the bearing to simulate the bearing and transmission of axial force, bending moment, and torque at the bearing connection, the one-dimensional connection unit has the advantages of simple geometry and high calculation efficiency.

[0055] In the embodiment of the present application, as an optional implementation, the method of the embodiment of the present application includes the following steps:

[0056] A finite element model of the gearbox housing is established, and housing parameters are determined based on the finite element model of the gearbox housing, wherein the housing parameters include housing stiffness and mass matrix.

[0057] This optional implementation can establish a finite element model of the gearbox housing, and determine housing parameters based on the finite element model of the gearbox housing, wherein the housing parameters include housing stiffness and mass matrix.

[0058] In this optional implementation, the gearbox housing finite element model is used to analyze the mechanical properties of the gearbox housing.

[0059] In the embodiment of the present application, as an optional implementation, the step of determining the housing parameters based on the gearbox housing finite element model includes the following sub-steps:

[0060] Based on the finite element model of the gearbox housing, constraint modes of more than 10 orders are extracted to obtain the housing parameters.

[0061] This optional implementation can extract constraint modes of order 10 or above based on the gearbox housing finite element model to obtain housing parameters.

[0062] In an optional embodiment, the actual operating data of the bearing includes at least bearing temperature, bearing clearance, bearing preload, rotational speed and torque input.

[0063] This optional implementation may determine the actual operating data of the bearing based on bearing temperature, bearing clearance, bearing preload, rotational speed and torque input.

[0064] In an optional embodiment, the directional connection stiffness of the bearing includes the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0065] This optional implementation may use the axial stiffness of the bearing in the radial direction, the axial stiffness of the bearing in the axial direction, and the torsional stiffness of the bearing in the radial direction as the directional connection stiffness of the bearing.

[0066] In an optional embodiment, the one-dimensional connection unit has six-directional stiffness, wherein five-directional stiffness of the one-dimensional connection unit is determined based on the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0067] This optional implementation may determine five-way stiffness of the one-dimensional connection unit based on the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

[0068] In an optional embodiment, the axial torque stiffness of the one-dimensional connection unit is zero, and the axial torque stiffness of the one-dimensional connection unit and the other five-directional stiffnesses of the one-dimensional connection unit constitute the six-directional stiffness of the one-dimensional connection unit.

[0069] This optional implementation may set the axial torque stiffness of the one-dimensional connection unit to zero.

[0070] Embodiment 1

[0071] See also Figure 3 , Figure 3 1 is a schematic diagram of the structure of a rotating shaft modal calculation device with a multi-bearing support method disclosed in an embodiment of the present application. Figure 3 As shown, the device of the embodiment of the present application includes the following modules:

[0072] A construction module 201 is used to construct a one-dimensional simulation model of a gear system;

[0073] A determination module 202 is used to determine input parameters of a one-dimensional simulation model of a gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include actual working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing;

[0074] A first simulation calculation module 203 is used to perform system deformation analysis based on a one-dimensional simulation model of the gear system to obtain a directional connection stiffness of the bearing;

[0075] The second simulation calculation module 204 is used to calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the connection of the bearing is connected to the one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

[0076] The device of the embodiment of the present application constructs a one-dimensional simulation model of the gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the connection of the bearing is connected to the one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the connection of the bearing is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by a one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode.

[0077] Embodiment 3

[0078] See also Figure 4 , Figure 4 Schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown, the electronic device includes:

[0079] Processor 301; and

[0080] The memory 302 is configured to store machine-readable instructions, and when the instructions are executed by the processor, the modal calculation method of the rotating shaft in the multi-bearing support mode as described in any of the aforementioned implementations is performed.

[0081] The electronic device of the embodiment of the present application constructs a one-dimensional simulation model of the gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to the one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by the one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. The prior art requires the construction of a finite element model of the bearing, and the construction process of the finite element model of the bearing will complicate the pre-processing steps of the rotating shaft mode and the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode.

[0082] Embodiment 4

[0083] An embodiment of the present application provides a storage medium storing a computer program, and the computer program is executed by a processor to provide a method for calculating a modal state of a rotating shaft in a multi-bearing support manner as described in any of the aforementioned implementations.

[0084] The storage medium of the embodiment of the present application constructs a one-dimensional simulation model of the gear system and determines the input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include the actual working condition data of the bearing connected to the rotating shaft and the gearbox housing parameters, and then can perform system deformation analysis based on the one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing, and then can calculate the rotating shaft mode based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to the one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing. Compared with the prior art, the present application performs system deformation analysis based on the actual working condition data of the bearing, and the calculated directional connection stiffness of the bearing takes into account the actual working condition data of the bearing, so that the rotating shaft mode calculated based on the three-dimensional finite element model of the rotating shaft more accurately reflects the rotating shaft mode under the actual working condition. On the other hand, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing of the present application adopts a rigid connection, and the connection of the bearing is connected to a one-dimensional connection unit, so that the finite element model of the bearing can be replaced by a one-dimensional connection unit, thereby simplifying the pre-processing steps of the rotating shaft mode and improving the calculation efficiency of the rotating shaft mode. However, the prior art needs to construct a finite element model of the bearing, and the construction process of the finite element model of the bearing will cause the pre-processing steps of the rotating shaft mode to be complicated, as well as the calculation amount of the finite element model of the bearing, thereby reducing the calculation efficiency of the rotating shaft mode. In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0085] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0086] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0087] It should be noted that if the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM) random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0088] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0089] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for calculating the modal state of a rotating shaft with multiple bearing supports, characterized in that: The method comprises: Construct a one-dimensional simulation model of the gear system; Determining input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include actual working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing; Performing system deformation analysis based on a one-dimensional simulation model of the gear system to obtain the directional connection stiffness of the bearing; The modes of the rotating shaft are calculated based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, a rigid connection is adopted at the connection of the bearing, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

2. The method according to claim 1, characterized in that The method comprises: A gearbox housing finite element model is established, and housing parameters are determined based on the gearbox housing finite element model, wherein the housing parameters include housing stiffness and mass matrix.

3. The method according to claim 2, characterized in that The determining of housing parameters based on the gearbox housing finite element model comprises: Based on the gearbox housing finite element model, constraint modes of order 10 or above are extracted to obtain the housing parameters.

4. The method according to claim 1, characterized in that The actual operating data of the bearing includes at least bearing temperature, bearing clearance, bearing preload, rotation speed and torque input.

5. The method according to claim 1, characterized in that The directional connection stiffness of the bearing includes the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

6. The method according to claim 5, characterized in that The one-dimensional connection unit has six-directional stiffness, wherein five-directional stiffness of the one-dimensional connection unit is determined based on the axial stiffness in the radial direction of the bearing, the axial stiffness in the axial direction of the bearing, and the torsional stiffness in the radial direction of the bearing.

7. The method according to claim 5, characterized in that The axial torque stiffness of the one-dimensional connection unit is zero, and the axial torque stiffness of the one-dimensional connection unit and the other five-directional stiffnesses of the one-dimensional connection unit constitute the six-directional stiffness of the one-dimensional connection unit.

8. A modal calculation device for a rotating shaft supported by multiple bearings, the device comprising: A building module for building a one-dimensional simulation model of a gear system; A determination module, used to determine input parameters of the one-dimensional simulation model of the gear system, wherein the input parameters of the one-dimensional simulation model of the gear system include real working condition data of a bearing connected to the rotating shaft and parameters of a gearbox housing; A first simulation calculation module is used to perform system deformation analysis based on a one-dimensional simulation model of the gear system to obtain a directional connection stiffness of the bearing; The second simulation calculation module is used to calculate the mode of the rotating shaft based on the three-dimensional finite element model of the rotating shaft, wherein, in the three-dimensional finite element model of the rotating shaft, the connection of the bearing adopts a rigid connection, and the other side of the rigid connection is connected to a one-dimensional connection unit, and the directional connection stiffness in the one-dimensional connection unit is determined based on the directional connection stiffness of the bearing.

9. An electronic device, characterized in that: include: processor; as well as A memory configured to store machine-readable instructions, which, when executed by the processor, execute the modal calculation method for a rotating shaft in a multi-bearing support manner as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is executed by a processor to calculate the modal shape of a rotating shaft in a multi-bearing support method as described in any one of claims 1 to 7.

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