Method and device for determining the connecting stiffness of a bolted structure rotor, storage medium

Abstract

The application discloses a bolt joint structure rotor connection stiffness determination method and device, a storage medium and a computer device. The method comprises the following steps: performing grid division on a three-dimensional model corresponding to a bolt joint structure according to a preset grid division rule to obtain a three-dimensional model to be analyzed; determining a fixing surface of the bolt joint structure based on the three-dimensional model to be analyzed, and obtaining a support reaction force and a support reaction torque corresponding to the fixing surface through simulation calculation; and determining rotor connection stiffness of the bolt joint structure according to the support reaction force and the support reaction torque. The bolt joint structure rotor connection stiffness is directly determined in the form of finite element simulation calculation, the bolt joint structure rotor connection stiffness can be efficiently and simply determined, the accuracy is higher, and the vibration problem of the bolt joint structure rotor caused by insufficient connection stiffness is avoided, so that accurate data support is provided for dynamic characteristic analysis of the rotor.

Description

Technical Field

[0001] This application relates to the field of finite element simulation technology, and in particular to a method and apparatus for determining the stiffness of a bolted rotor connection, a storage medium, and a computer device. Background Technology

[0002] Modern compressor units are increasingly larger, but due to current limited manufacturing capabilities, ultra-large rotors in compressor units must be manufactured through segmented processing and bolted connections. Early rotor dynamics analyses typically ignored the influence of the connection structure on the rotor's dynamic characteristics. However, in actual operation, it has been found that the structural parameters of the bolted connection structure and the bolt preload directly affect the connection stiffness of the bolted connection structure, ultimately impacting its safety and functionality. Therefore, accurately quantifying and evaluating the connection stiffness of bolted rotor structures is essential.

[0003] Currently, methods for evaluating the stiffness of bolted joint structures mainly include the equivalent spring method and the virtual material method. The equivalent spring method uses spring elements to characterize the stiffness characteristics of the connection interface, primarily considering the influence of axial tension and compression on stiffness. The virtual material method uses thin-layer elements to simulate the bolted connection interface, mainly considering the influence of structural parameters and loads on angular stiffness. From the above results, it is clear that current research results indirectly solve for the connection stiffness characteristics of bolted joint structures, resulting in complex calculations, incomplete considerations, and poor accuracy. Summary of the Invention

[0004] In view of this, this application provides a method, apparatus, storage medium, and computer equipment for determining the stiffness of a bolt-locked rotor connection, which can efficiently and easily determine the stiffness of a bolt-locked rotor connection with higher accuracy.

[0005] According to one aspect of this application, a method for determining the stiffness of a bolt-fitted rotor connection is provided, comprising:

[0006] The three-dimensional model corresponding to the bolt engagement structure is meshed according to the preset meshing rules to obtain the three-dimensional model to be analyzed. The three-dimensional model includes the engagement component and the engagement bolt.

[0007] Based on the three-dimensional model to be analyzed, the fixing surface of the bolt engagement structure is determined, and the support reaction force and support reaction moment corresponding to the fixing surface are obtained through simulation calculation.

[0008] The rotor connection stiffness of the bolted coupling structure is determined based on the support reaction force and the support reaction moment.

[0009] Optionally, the step of determining the fixing surface of the bolt engagement structure based on the three-dimensional model to be analyzed, and obtaining the support reaction force and support reaction moment corresponding to the fixing surface through simulation calculation, specifically includes:

[0010] Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

[0011] Optionally, applying a unit displacement and a unit torsional angle to the loading surface specifically includes:

[0012] All nodes corresponding to the loading surface are determined, and the unit displacement and the unit torsion angle are applied to all nodes corresponding to the loading surface based on a preset load step.

[0013] Optionally, determining the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment specifically includes:

[0014] Based on the support reaction force and the unit displacement, the lateral stiffness of the bolt-jointed rotor connection is determined, and based on the support reaction moment and the unit torsion angle, the bending stiffness of the bolt-jointed rotor connection is determined.

[0015] Optionally, before meshing the 3D model corresponding to the bolt engagement structure according to a preset meshing rule, the method further includes:

[0016] Based on the two-dimensional geometric model corresponding to the bolt engagement structure, the geometric parameters of the two-dimensional geometric model are extracted, and a three-dimensional model corresponding to the bolt engagement structure is constructed according to the geometric parameters.

[0017] Optionally, after determining the lateral stiffness of the bolt-jointed rotor connection based on the support reaction force and the unit displacement, and determining the bending stiffness of the bolt-jointed rotor connection based on the support reaction moment and the unit torsion angle, the method further includes:

[0018] Based on the lateral stiffness and bending stiffness of the bolt-jointed rotor connection, the equivalent stiffness of the bolt-jointed rotor connection is determined, and based on the equivalent stiffness of the bolt-jointed rotor connection and the preset required stiffness, the safety margin of the bolt-jointed rotor connection is determined.

[0019] According to another aspect of this application, a device for determining the stiffness of a bolt-fitted rotor connection is provided, comprising:

[0020] The mesh generation module is used to mesh the three-dimensional model corresponding to the bolt engagement structure according to the preset mesh generation rules to obtain the three-dimensional model to be analyzed, wherein the three-dimensional model includes the engagement component and the engagement bolt;

[0021] The calculation module is used to determine the fixing surface of the bolt clamping structure based on the three-dimensional model to be analyzed, and to obtain the support reaction force and support reaction moment corresponding to the fixing surface through simulation calculation.

[0022] The stiffness determination module is used to determine the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment.

[0023] Optionally, the computing module is specifically used for:

[0024] Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

[0025] Optionally, the computing module is further used for:

[0026] All nodes corresponding to the loading surface are determined, and the unit displacement and the unit torsion angle are applied to all nodes corresponding to the loading surface based on a preset load step.

[0027] Optionally, the stiffness determination module is specifically used for:

[0028] Based on the support reaction force and the unit displacement, the lateral stiffness of the bolt-jointed rotor connection is determined, and based on the support reaction moment and the unit torsion angle, the bending stiffness of the bolt-jointed rotor connection is determined.

[0029] Optionally, the device further includes:

[0030] The model generation module is used to extract the geometric parameters of the two-dimensional geometric model corresponding to the bolt handle structure before meshing the three-dimensional model corresponding to the bolt handle structure according to the preset meshing rules, and to construct the three-dimensional model corresponding to the bolt handle structure based on the geometric parameters.

[0031] Optionally, the device further includes:

[0032] The safety margin determination module is used to determine the lateral stiffness of the bolt-locked rotor connection based on the support reaction force and the unit displacement, and the bending stiffness of the bolt-locked rotor connection based on the support reaction moment and the unit torsion angle. Then, based on the lateral stiffness and bending stiffness of the bolt-locked rotor connection, it determines the equivalent stiffness of the bolt-locked rotor connection, and based on the equivalent stiffness of the bolt-locked rotor connection and the preset required stiffness, it determines the safety margin of the bolt-locked rotor connection.

[0033] According to another aspect of this application, a storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method for determining the rotor connection stiffness of the bolt-locking structure described above.

[0034] According to another aspect of this application, a computer device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor executes the program to implement the method for determining the rotor connection stiffness of the bolt-fitted structure described above.

[0035] Using the above technical solution, this application provides a method, apparatus, storage medium, and computer equipment for determining the rotor connection stiffness of a bolt-locked structure. First, the three-dimensional model corresponding to the bolt-locked structure is divided according to a preset mesh generation rule, resulting in a three-dimensional model to be analyzed. Next, based on the three-dimensional model, any one of the non-contact surfaces of the bolt-locked structure subjected to bolt clamping is taken as a fixed surface. Then, the support reaction force and support reaction moment corresponding to this fixed surface are determined through simulation calculation. After calculating the support reaction force and support reaction moment corresponding to the fixed surface, the rotor connection stiffness of the bolt-locked structure can be further determined based on these forces and moments. This application embodiment directly determines the connection stiffness of the bolt-locked rotor structure through finite element simulation calculation, without the need for indirect equivalents to spring link elements and thin-layer elements. This method can efficiently and easily determine the connection stiffness of the bolt-locked rotor structure. At the same time, the three-dimensional model includes the locked components and the locking bolts, which is more comprehensive and accurate. This avoids the vibration problem caused by insufficient connection stiffness of the bolt-locked rotor structure, and provides accurate data support for the dynamic characteristic analysis of the rotor.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 A flowchart illustrating a method for determining the stiffness of a bolt-locked rotor connection according to an embodiment of this application is shown.

[0039] Figure 2 A flowchart illustrating another method for determining the stiffness of a bolt-locked rotor connection according to an embodiment of this application is shown.

[0040] Figure 3 This paper shows a schematic diagram of a device for determining the stiffness of a bolt-locked rotor connection according to an embodiment of this application. Detailed Implementation

[0041] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0042] This embodiment provides a method for determining the stiffness of a bolt-fitted rotor connection, such as... Figure 1 As shown, the method includes:

[0043] Step 101: Mesh the three-dimensional model corresponding to the bolt engagement structure according to the preset meshing rules to obtain the three-dimensional model to be analyzed. The three-dimensional model includes the engagement component and the engagement bolt.

[0044] The method for determining the rotor connection stiffness of the bolt-locking structure in this application embodiment is mainly implemented through simulation analysis software. The simulation software interface can include an existing three-dimensional model corresponding to the bolt-locking structure, which specifically includes the locked component and the locking bolt. First, the three-dimensional model can be divided according to a preset mesh generation rule, and after division, the three-dimensional model to be analyzed corresponding to the bolt-locking structure can be obtained.

[0045] Step 102: Based on the three-dimensional model to be analyzed, determine the fixing surface of the bolt engagement structure, and obtain the support reaction force and support reaction moment corresponding to the fixing surface through simulation calculation;

[0046] In this embodiment, before determining the rotor connection stiffness of the bolt-locking structure, it is necessary to first determine the support reaction force and support reaction moment corresponding to the fixed surface in the bolt-locking structure. Therefore, based on the three-dimensional model to be analyzed, any one of the non-contact surfaces in the bolt-locking structure subjected to the bolt-locking action can be taken as the fixed surface, and then the support reaction force and support reaction moment corresponding to the fixed surface can be determined through simulation calculation. Here, the non-contact surface refers to the surface that does not contact other components in the bolt-locking structure.

[0047] Step 103: Determine the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment.

[0048] In this embodiment, after calculating the support reaction force and support reaction moment corresponding to the fixed surface, the rotor connection stiffness of the bolted joint structure can be further determined based on the support reaction force and support reaction moment.

[0049] By applying the technical solution of this embodiment, the three-dimensional model corresponding to the bolt-locking structure can first be divided according to a preset meshing rule, resulting in a three-dimensional model to be analyzed corresponding to the bolt-locking structure. Next, based on the three-dimensional model to be analyzed, any one of the non-contact surfaces of the bolt-locking structure subjected to the bolt-locking action is taken as a fixed surface. Then, the support reaction force and support reaction moment corresponding to this fixed surface are determined through simulation calculation. After calculating the support reaction force and support reaction moment corresponding to the fixed surface, the rotor connection stiffness of the bolt-locking structure can be further determined based on these forces. This embodiment directly determines the rotor connection stiffness of the bolt-locking structure through finite element simulation calculation, without the need for indirect equivalence to spring link elements and thin-layer elements. This allows for efficient and convenient determination of the rotor connection stiffness. Furthermore, the three-dimensional model includes both the locked components and the locking bolts, providing a more comprehensive and accurate assessment, thereby avoiding vibration problems caused by insufficient connection stiffness in the bolt-locking structure rotor and providing precise data support for the dynamic characteristic analysis of the rotor.

[0050] Furthermore, as a refinement and extension of the specific implementation of the above embodiments, and to fully illustrate the specific implementation process of this embodiment, another method for improving the stiffness of the bolt-fitted rotor connection is provided, such as... Figure 2 As shown, the method includes:

[0051] Step 201: Based on the two-dimensional geometric model corresponding to the bolt engagement structure, extract the geometric parameters of the two-dimensional geometric model, and construct the three-dimensional model corresponding to the bolt engagement structure according to the geometric parameters;

[0052] In this embodiment, a two-dimensional geometric model of the bolt assembly structure can be used as a basis to extract the geometric parameters corresponding to different parts from the two-dimensional geometric model. Here, the geometric parameters may include structural dimension parameters, assembly sequence, etc., and then a three-dimensional model corresponding to the bolt assembly structure can be automatically constructed based on these geometric parameters.

[0053] Step 202: Mesh the three-dimensional model corresponding to the bolt engagement structure according to the preset meshing rules to obtain the three-dimensional model to be analyzed. The three-dimensional model includes the engagement component and the engagement bolt.

[0054] Step 203: Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation;

[0055] In this embodiment, the 3D model can be divided according to a preset meshing rule, resulting in a 3D model to be analyzed corresponding to the bolt engagement structure. Here, the preset meshing rule can be finite element meshing using sixteen-node hexahedral elements with second-order shape functions. Then, any non-contact surface of the engaged component in the 3D model subjected to the bolt engagement is used as the fixed surface corresponding to the bolt engagement structure, and a fixed constraint is applied to this fixed surface. Specifically, all nodes on this fixed surface can be identified, and fixed constraints can be applied to all of them. Next, another non-contact surface in the 3D model subjected to the bolt engagement can be used as a loading surface for unit displacement and unit torsion angle. Unit displacement and unit torsion angle can be applied to this loading surface, and a preset preload force can be applied to the bolt engagement in the 3D model to be analyzed. When fixed constraints, unit displacement, and unit torsion angle are applied to the bolt engagement structure, and a preset preload force is applied to the bolt engagement, the support reaction force and support reaction moment corresponding to the fixed surface of the bolt engagement structure can be obtained through simulation calculation.

[0056] Step 204: Determine the lateral stiffness of the bolt-jointed rotor connection based on the support reaction force and the unit displacement, and determine the bending stiffness of the bolt-jointed rotor connection based on the support reaction moment and the unit torsion angle.

[0057] In this embodiment, after calculating the support reaction force and support reaction moment corresponding to the fixed surface of the bolted joint structure, the transverse stiffness of the rotor connection of the bolted joint structure can be obtained by dividing the support reaction force by the unit displacement applied on the loading surface, and the bending stiffness of the rotor connection of the bolted joint structure can be obtained by dividing the support reaction moment by the unit torsion angle applied on the loading surface.

[0058] Step 205: Based on the lateral stiffness and bending stiffness of the bolt-locked rotor connection, determine the equivalent stiffness of the bolt-locked rotor connection, and based on the equivalent stiffness of the bolt-locked rotor connection and the preset required stiffness, determine the safety margin of the bolt-locked rotor connection.

[0059] In this embodiment, the equivalent stiffness can be further calculated based on the lateral and bending stiffness of the bolt-locked rotor connection. Furthermore, a minimum required stiffness can be preset—the minimum stiffness that ensures the safety of the bolt-locked connection. Then, based on the equivalent stiffness and the preset required stiffness, the safety margin of the bolt-locked rotor connection is calculated. Specifically, this safety margin can be obtained by dividing the equivalent stiffness by the preset required stiffness. This application allows for the calculation of the corresponding safety margin using the equivalent stiffness and the preset required stiffness of the bolt-locked structure, providing a convenient and quick way to determine the safety of the bolt-locked structure.

[0060] Optionally, the step 203 of "applying a unit displacement and a unit torsion angle to the loading surface" specifically includes: determining all nodes corresponding to the loading surface, and applying the unit displacement and the unit torsion angle to all nodes corresponding to the loading surface based on a preset load step.

[0061] In this embodiment, when applying unit displacement and unit torsion angle to the loading surface, all nodes corresponding to the loading surface can be determined first. Then, unit displacement and unit torsion angle are applied to these nodes according to the preset load step to ensure that the support reaction force and support reaction moment obtained by simulation calculation are correct.

[0062] Optionally, step 201 may specifically include: based on the two-dimensional geometric models of each component in the bolt engagement structure and the engagement bolt; extracting the geometric parameters of the two-dimensional geometric models respectively, and constructing a three-dimensional model of each component in the bolt engagement structure and the engagement bolt based on the geometric parameters; constructing the three-dimensional model corresponding to the bolt engagement structure based on the three-dimensional model of each component in the bolt engagement structure and the engagement bolt, wherein the components in the bolt engagement structure include at least two.

[0063] In this embodiment, the bolt engagement structure may include different components and engagement bolts. First, based on the two-dimensional geometric models corresponding to the different components and engagement bolts in the bolt engagement structure, the geometric parameters of each component and engagement bolt in the bolt engagement structure are extracted from these two-dimensional geometric models. Then, using these geometric parameters, a three-dimensional model corresponding to each component and engagement bolt is constructed. The two-dimensional geometric model can be a three-view model. Next, these three-dimensional models of the components and engagement bolts are assembled to obtain the three-dimensional model corresponding to the bolt engagement structure. This embodiment of the application constructs the three-dimensional model corresponding to the bolt engagement structure using two-dimensional geometric models, effectively reducing the difficulty of modeling and making the creation of the three-dimensional model more convenient and faster.

[0064] Furthermore, as Figure 1 In a specific implementation of the method, this application provides a device for determining the stiffness of a bolt-fitted rotor connection, such as... Figure 3 As shown, the device includes:

[0065] The mesh generation module is used to mesh the three-dimensional model corresponding to the bolt engagement structure according to the preset mesh generation rules to obtain the three-dimensional model to be analyzed, wherein the three-dimensional model includes the engagement component and the engagement bolt;

[0066] The calculation module is used to determine the fixing surface of the bolt clamping structure based on the three-dimensional model to be analyzed, and to obtain the support reaction force and support reaction moment corresponding to the fixing surface through simulation calculation.

[0067] The stiffness determination module is used to determine the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment.

[0068] Optionally, the computing module is specifically used for:

[0069] Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

[0070] Optionally, the computing module is further used for:

[0071] All nodes corresponding to the loading surface are determined, and the unit displacement and the unit torsion angle are applied to all nodes corresponding to the loading surface based on a preset load step.

[0072] Optionally, the stiffness determination module is specifically used for:

[0073] Based on the support reaction force and the unit displacement, the lateral stiffness of the bolt-jointed rotor connection is determined, and based on the support reaction moment and the unit torsion angle, the bending stiffness of the bolt-jointed rotor connection is determined.

[0074] Optionally, the device further includes:

[0075] The model generation module is used to extract the geometric parameters of the two-dimensional geometric model corresponding to the bolt handle structure before meshing the three-dimensional model corresponding to the bolt handle structure according to the preset meshing rules, and to construct the three-dimensional model corresponding to the bolt handle structure based on the geometric parameters.

[0076] Optionally, the device further includes:

[0077] The safety margin determination module is used to determine the lateral stiffness of the bolt-locked rotor connection based on the support reaction force and the unit displacement, and the bending stiffness of the bolt-locked rotor connection based on the support reaction moment and the unit torsion angle. Then, based on the lateral stiffness and bending stiffness of the bolt-locked rotor connection, it determines the equivalent stiffness of the bolt-locked rotor connection, and based on the equivalent stiffness of the bolt-locked rotor connection and the preset required stiffness, it determines the safety margin of the bolt-locked rotor connection.

[0078] It should be noted that for other corresponding descriptions of the functional units involved in the bolt-locking rotor connection stiffness determination device provided in this application embodiment, please refer to... Figures 1 to 2 The corresponding descriptions in the method will not be repeated here.

[0079] Based on the above, Figures 1 to 2 Accordingly, this application also provides a storage medium storing a computer program, which, when executed by a processor, implements the above-described method. Figures 1 to 2 The method for determining the stiffness of the rotor connection in the bolt-jointed structure is shown.

[0080] Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or portable hard drive), and includes several instructions to cause a computer device (such as a personal computer, server, or network device) to execute the methods described in the various implementation scenarios of this application.

[0081] Based on the above, Figures 1 to 2 The method shown, and Figure 3To achieve the above objectives, the present application also provides a computer device, specifically a personal computer, server, network device, etc., as shown in the virtual device embodiment. This computer device includes a storage medium and a processor; the storage medium stores a computer program; the processor executes the computer program to achieve the above-described objectives. Figures 1 to 2 The method for determining the stiffness of the rotor connection in the bolt-jointed structure is shown.

[0082] Optionally, the computer device may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, input units such as a keyboard, etc., and optional user interfaces may also include USB interfaces, card reader interfaces, etc. The network interface may optionally include standard wired interfaces, wireless interfaces (such as Bluetooth interfaces, Wi-Fi interfaces), etc.

[0083] Those skilled in the art will understand that the computer device structure provided in this embodiment does not constitute a limitation on the computer device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0084] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages and stores the hardware and software resources of a computer device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software within the physical device.

[0085] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented using software plus necessary general-purpose hardware platforms, or it can be implemented in hardware. First, the three-dimensional model corresponding to the bolt-locking structure can be divided according to a preset mesh generation rule, resulting in a three-dimensional model to be analyzed corresponding to the bolt-locking structure. Next, based on the three-dimensional model to be analyzed, any one of the non-contact surfaces of the bolt-locking structure subjected to the bolt-locking action is taken as a fixed surface. Then, the support reaction force and support reaction moment corresponding to this fixed surface are determined through simulation calculations. After calculating the support reaction force and support reaction moment corresponding to the fixed surface, the rotor connection stiffness of the bolt-locking structure can be further determined based on the support reaction force and support reaction moment. This application embodiment directly determines the connection stiffness of the bolt-locked rotor structure through finite element simulation calculation, without the need for indirect equivalents to spring link elements and thin-layer elements. This method can efficiently and easily determine the connection stiffness of the bolt-locked rotor structure. At the same time, the three-dimensional model includes the locked components and the locking bolts, which is more comprehensive and accurate. This avoids the vibration problem caused by insufficient connection stiffness of the bolt-locked rotor structure, and provides accurate data support for the dynamic characteristic analysis of the rotor.

[0086] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0087] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A method for determining the stiffness of a bolt-locked rotor connection, characterized in that, include: The three-dimensional model corresponding to the bolt engagement structure is meshed according to the preset meshing rules to obtain the three-dimensional model to be analyzed. The three-dimensional model includes the engagement component and the engagement bolt. Based on the three-dimensional model to be analyzed, the fixing surface of the bolt engagement structure is determined, and the support reaction force and support reaction moment corresponding to the fixing surface are obtained through simulation calculation. The rotor connection stiffness of the bolted coupling structure is determined based on the support reaction force and the support reaction moment. Based on the three-dimensional model to be analyzed, the fixing surface of the bolt engagement structure is determined, and the support reaction force and support reaction moment corresponding to the fixing surface are obtained through simulation calculation, specifically including: Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

2. The method according to claim 1, characterized in that, The application of a unit displacement and a unit torsional angle to the loading surface specifically includes: All nodes corresponding to the loading surface are determined, and the unit displacement and the unit torsion angle are applied to all nodes corresponding to the loading surface based on a preset load step.

3. The method according to claim 1, characterized in that, The determination of the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment specifically includes: Based on the support reaction force and the unit displacement, the lateral stiffness of the bolt-jointed rotor connection is determined, and based on the support reaction moment and the unit torsion angle, the bending stiffness of the bolt-jointed rotor connection is determined.

4. The method according to claim 1, characterized in that, Before meshing the 3D model corresponding to the bolt engagement structure according to the preset meshing rules, the method further includes: Based on the two-dimensional geometric model corresponding to the bolt engagement structure, the geometric parameters of the two-dimensional geometric model are extracted, and a three-dimensional model corresponding to the bolt engagement structure is constructed according to the geometric parameters.

5. The method according to claim 3, characterized in that, After determining the lateral stiffness of the bolt-jointed rotor connection based on the support reaction force and the unit displacement, and determining the bending stiffness of the bolt-jointed rotor connection based on the support reaction moment and the unit torsion angle, the method further includes: Based on the lateral stiffness and bending stiffness of the bolt-jointed rotor connection, the equivalent stiffness of the bolt-jointed rotor connection is determined, and based on the equivalent stiffness of the bolt-jointed rotor connection and the preset required stiffness, the safety margin of the bolt-jointed rotor connection is determined.

6. A device for determining the stiffness of a bolt-locked rotor connection, characterized in that, include: The mesh generation module is used to mesh the three-dimensional model corresponding to the bolt engagement structure according to the preset mesh generation rules to obtain the three-dimensional model to be analyzed, wherein the three-dimensional model includes the engagement component and the engagement bolt; The calculation module is used to determine the fixing surface of the bolt clamping structure based on the three-dimensional model to be analyzed, and to obtain the support reaction force and support reaction moment corresponding to the fixing surface through simulation calculation. The stiffness determination module is used to determine the rotor connection stiffness of the bolted coupling structure based on the support reaction force and the support reaction moment. The computing module is specifically used for: Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

7. The apparatus according to claim 6, characterized in that, The computing module is specifically used for: Take any non-contact surface of the engaged component under the action of the engagement bolt as the fixed surface, determine all nodes corresponding to the fixed surface, apply fixed constraints to all nodes corresponding to the fixed surface, and take another non-contact surface in the three-dimensional model to be analyzed as the loading surface, apply a unit displacement and a unit torsion angle to the loading surface, apply a preset preload to the engagement bolt, and obtain the support reaction force and support reaction moment corresponding to the fixed surface through simulation calculation.

8. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

9. A computer device, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 5.

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