Vibration response analysis method for single crystal turbine blade under three-dimensional random orientation deviation

Abstract

The invention relates to a vibration response analysis method, device, equipment and medium under three-dimensional random orientation deviation of a single-crystal turbine blade, and relates to the technical field of mechanical engineering.The method comprises the steps that a single-crystal turbine blade design model is imported into finite element analysis software, model simplification is conducted, and a single-crystal turbine blade three-dimensional model is obtained; performing vibration response analysis on the single crystal turbine blade three-dimensional model under three-dimensional random orientation deviation to obtain frequencies and vibration modes corresponding to different rotating speeds of the single crystal turbine blade under different pitch diameter numbers; creating a Campbell chart based on the corresponding relationship between the rotating speed and the frequency, and adding a resonance margin tolerance range and an excitation line on the Campbell chart; and determining an intersection point of a frequency line and an excitation line on the Campbell diagram, and judging the possibility that the single crystal turbine blade has resonance if the intersection point is located in a resonance margin tolerance range. According to the invention, the data processing time for carrying out vibration response analysis on the single crystal turbine blade can be saved, and the accuracy and comprehensiveness of the analysis result are improved.

Description

Background Art

[0002] As a key component of the engine structure, the blades usually minimize their weight to improve the working efficiency of the engine and maximize the energy supply of the fuel. The high temperature and high pressure working environment places high demands on the performance of the engine blades. Single crystal turbine blades have excellent high temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance and fracture toughness and other comprehensive properties, making them a good material for engine blades.

[0003] Since single-crystal turbine blades often work under high temperature, high pressure and high-speed rotation conditions, they are easily affected by vibration characteristics and produce adverse vibration responses, which in turn cause the blades to break and damage, affecting the stability of the engine, and thus causing navigation hazards. Therefore, it is necessary to analyze the vibration response of single-crystal turbine blades during the structural design stage of the blades to determine the possibility of resonance in single-crystal turbine blades. However, in some related technologies, when analyzing the vibration response of single-crystal turbine blades, a speed-frequency Campbell diagram is first drawn, and then the resonance margin of each operating speed is calculated, and it is compared with the standard value to determine whether resonance occurs. There are many calculation processes, and it is easy to miss the calculation results and the analysis results are not intuitive enough. Therefore, there is still room for improvement in the vibration response analysis method for single-crystal turbine blades. Summary of the invention

[0004] The purpose of the present disclosure is to provide a method, device, electronic device and computer-readable storage medium for vibration response analysis of single-crystal turbine blades under three-dimensional random orientation deviation, which can optimize the vibration response analysis of single-crystal turbine blades under three-dimensional random orientation deviation, save data processing time, and improve the accuracy and comprehensiveness of vibration response analysis results.

[0005] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0006] According to a first aspect of the present disclosure, a method for analyzing the vibration response of a single-crystal turbine blade under three-dimensional random orientation deviation is provided, comprising: importing a single-crystal turbine blade design model into finite element analysis software and simplifying the model to obtain a three-dimensional model of the single-crystal turbine blade; performing a vibration response analysis on the three-dimensional model of the single-crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotational speeds of the single-crystal turbine blade at different numbers of node diameters; creating a Campbell diagram based on the corresponding relationship between the rotational speed and the frequency, and adding a resonance margin tolerance range and an excitation line to the Campbell diagram; determining the intersection of the frequency line and the excitation line on the Campbell diagram, and in response to the intersection being within the resonance margin tolerance range, determining the possibility of resonance of the single-crystal turbine blade.

[0007] In an exemplary embodiment of the present disclosure, a single crystal turbine blade design model is imported into finite element analysis software and the model is simplified to obtain a three-dimensional model of a single crystal turbine blade, including: creating a single crystal turbine blade design model based on a solid single crystal turbine blade; importing the single crystal turbine blade design model into finite element analysis software, and performing model cutting and redundant feature deletion on the single crystal turbine blade design model to obtain a three-dimensional model of a single crystal turbine blade.

[0008] In an exemplary embodiment of the present disclosure, a vibration response analysis is performed on a three-dimensional model of a single-crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotational speeds of the turbine blade at different numbers of pitch diameters, including: creating a static analysis module, performing a static analysis on the three-dimensional model of the single-crystal turbine blade based on the static analysis module, and obtaining the maximum equivalent stress of the single-crystal turbine blade at different rotational speeds to determine whether the single-crystal turbine blade meets the design requirements; creating a modal analysis module based on the static analysis module, and performing a vibration response analysis on the three-dimensional model of the single-crystal turbine blade based on the modal analysis module to obtain the frequency and vibration mode corresponding to different rotational speeds of the single-crystal turbine blade at different numbers of pitch diameters.

[0009] In an exemplary embodiment of the present disclosure, a static analysis module is created, including: importing temperature and air pressure data into finite element analysis software, simultaneously meshing and applying constraint boundary conditions to a three-dimensional model of a single crystal turbine blade, setting stress and strain result output, and completing the creation of the static analysis module.

[0010] In an exemplary embodiment of the present disclosure, a modal analysis module is created based on a static analysis module, including: defining modal analysis loads, selecting the number of node diameters for output results, setting stress-strain result output and solution calculations, and completing the creation of the modal analysis module.

[0011] In an exemplary embodiment of the present disclosure, a Campbell diagram is created based on the correspondence between the rotational speed and the frequency, and a resonance margin tolerance range and an excitation line are added to the Campbell diagram, including: creating a Campbell diagram with a node diameter number of zero based on the correspondence between the rotational speed and the frequency; performing a resonance margin calculation based on the resonance rotational speed and the operating rotational speed to determine the resonance margin tolerance range; performing an excitation line calculation based on the harmonic coefficient and the operating rotational speed to obtain the excitation line; and adding the resonance margin tolerance range and the excitation line to the Campbell diagram.

[0012] In an exemplary embodiment of the present disclosure, the vibration response analysis method of the above-mentioned single crystal turbine blade under three-dimensional random orientation deviation also includes: in response to the possibility of resonance of the single crystal turbine blade, judging the degree of damage caused by the resonance according to the size and deformation of the resonance frequency vibration mode.

[0013] According to a second aspect of the present disclosure, there is provided a vibration response analysis device for a single crystal turbine blade under three-dimensional random orientation deviation, comprising: a three-dimensional model creation module, for importing a single crystal turbine blade design model into finite element analysis software and simplifying the model to obtain a three-dimensional model of the single crystal turbine blade; a vibration response analysis module, for performing a vibration response analysis on the three-dimensional model of the single crystal turbine blade under three-dimensional random orientation deviation to obtain frequencies and vibration modes corresponding to different rotational speeds of the single crystal turbine blade under different numbers of node diameters; a tolerance range adding module, for creating a Campbell diagram based on the corresponding relationship between the rotational speed and the frequency, and adding a resonance margin tolerance range and an excitation line to the Campbell diagram; a resonance possibility determination module, for determining the intersection of the frequency line and the excitation line on the Campbell diagram, and in response to the intersection being within the resonance margin tolerance range, determining that there is a possibility of resonance in the single crystal turbine blade.

[0014] According to a third aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above methods and possible implementations thereof by executing the executable instructions.

[0015] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, any one of the above methods and possible implementation methods thereof are implemented.

[0016] In the technical solution provided by the embodiment of the present disclosure, on the one hand, the single crystal turbine blade design model is imported into the finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade and perform vibration response analysis, wherein the simplified three-dimensional model of the single crystal turbine blade can minimize the number of meshes of the finite element model, while shortening the time required for simulation solution and reducing the size of the simulation project file. On the other hand, a resonance margin tolerance range and an excitation line are added to the Campbell diagram, and based on the intersection of the frequency line and the excitation line on the Campbell diagram and the resonance margin tolerance, the resonance possibility of the single crystal turbine blade is judged, which saves data processing time and improves the accuracy and comprehensiveness of the vibration response analysis results, thereby being able to more intuitively and quickly judge whether there is a possibility of resonance in the single crystal turbine blade.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0019] Figure 1 A schematic flow chart of a vibration response analysis method for a single crystal turbine blade under three-dimensional random orientation deviation according to an embodiment of the present disclosure is schematically shown.

[0020] Figure 2 A schematic diagram of a process for obtaining a three-dimensional model of a single crystal turbine blade in an embodiment of the present disclosure is schematically shown.

[0021] Figure 3 A schematic diagram of a process for analyzing the vibration response of a three-dimensional model of a single-crystal turbine blade under three-dimensional random orientation deviation in an embodiment of the present disclosure is schematically shown.

[0022] Figure 4 A reference diagram schematically illustrates a Campbell diagram in an embodiment of the present disclosure.

[0023] Figure 5 A flow chart schematically illustrates another method for analyzing vibration responses of a single crystal turbine blade under three-dimensional random orientation deviation according to an embodiment of the present disclosure.

[0024] Figure 6 A block diagram of a vibration response analysis device for a single crystal turbine blade under three-dimensional random orientation deviation in an embodiment of the present disclosure is schematically shown.

[0025] Figure 7 A block diagram of an electronic device in an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0027] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0028] Engine blades are key components of the engine structure. In order to improve engine efficiency and maximize fuel energy supply, blade design requires maximum weight reduction, and designers try to make the structure as light and thin as possible. At the same time, when the engine is working, the blades are under high temperature, high pressure and high-speed rotation conditions, and the blades are easily affected by vibration characteristics and produce adverse vibration responses. Further causing blade fracture and damage, affecting the stability of the engine, and thus causing navigation hazards.

[0029] Single crystal turbine blades have excellent high temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance and fracture toughness and other comprehensive properties, and are good materials for engine blades. Since single crystal turbine blades often work under high temperature, high pressure and high-speed rotation conditions, they are easily affected by vibration characteristics and produce adverse vibration responses, which in turn cause the blades to break and damage, affecting the stability of the engine, and thus causing navigation hazards. Therefore, it is necessary to analyze the vibration response of single crystal turbine blades during the structural design stage of the blades to determine the possibility of resonance in single crystal turbine blades. However, in some related technologies, when analyzing the vibration response of single crystal turbine blades, a speed-frequency Campbell diagram is first drawn, and then the resonance margin of each operating speed is calculated, and it is compared with the standard value to determine whether resonance occurs. There are many calculation processes, and it is easy to miss the calculation results and the analysis results are not intuitive enough.

[0030] In order to solve some or all of the above technical problems, in some embodiments, a vibration response analysis method for a single crystal turbine blade under three-dimensional random orientation deviation is provided, which can optimize the vibration response analysis of a single crystal turbine blade under three-dimensional random orientation deviation, save data processing time, and improve the accuracy and comprehensiveness of the vibration response analysis results. Figure 1 As shown in , the vibration response analysis method of the single crystal turbine blade under three-dimensional random orientation deviation may specifically include the following steps:

[0031] In step S110, the single crystal turbine blade design model is imported into finite element analysis software and the model is simplified to obtain a single crystal turbine blade three-dimensional model;

[0032] In step S120, a vibration response analysis is performed on the three-dimensional model of the single crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotation speeds of the single crystal turbine blade under different pitch numbers;

[0033] In step S130, a Campbell diagram is created based on the corresponding relationship between the rotation speed and the frequency, and a resonance margin tolerance range and an excitation line are added to the Campbell diagram;

[0034] In step S140, the intersection of the frequency line and the excitation line on the Campbell diagram is determined, and in response to the intersection being within the resonance margin tolerance range, it is determined that there is a possibility of resonance in the single crystal turbine blade.

[0035] In the technical solution provided by this exemplary embodiment, on the one hand, the single crystal turbine blade design model is imported into the finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade and perform vibration response analysis, wherein the simplified three-dimensional model of the single crystal turbine blade can minimize the number of meshes of the finite element model, while shortening the time required for simulation solution and reducing the size of the simulation project file. On the other hand, a resonance margin tolerance range and an excitation line are added to the Campbell diagram, and based on the intersection of the frequency line and the excitation line on the Campbell diagram and the resonance margin tolerance, the resonance possibility of the single crystal turbine blade is judged, which saves data processing time and improves the accuracy and comprehensiveness of the vibration response analysis results, thereby being able to more intuitively and quickly judge whether there is a possibility of resonance in the single crystal turbine blade.

[0036] Below, reference Figure 1 As shown in , the above steps are described in more detail.

[0037] In step S110, the single crystal turbine blade design model is imported into finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade.

[0038] Among them, the single crystal turbine blade design model can represent a three-dimensional model of the structural characteristics and material composition of the solid single crystal turbine blade, and model simplification can represent deleting redundant parts in the model or cutting the model.

[0039] In some embodiments, reference Figure 2 As shown, the single crystal turbine blade design model can be imported into the finite element analysis software and simplified through steps S210 to S220 to obtain a single crystal turbine blade three-dimensional model.

[0040] In step S210, a single crystal turbine blade design model is created based on the solid single crystal turbine blade.

[0041] The solid single crystal turbine blade can be a single crystal turbine blade in an engine, or a single crystal turbine blade in other equipment or devices such as a turbine, which is not specifically limited in this exemplary embodiment. For example, an engine blade disk is equipped with 25 blades, and a fan-shaped area with an angle of 14.4 degrees between a single blade and the blade disk of the engine can be taken as a simulation object to establish a single crystal turbine blade design model.

[0042] In some embodiments, creating a single crystal turbine blade design model based on a solid single crystal turbine blade may be to establish a single crystal turbine blade design model based on the geometric data of the solid single crystal turbine blade. The geometric data of the turbine blade may be data related to the shape structure, size, and geometric features of the solid single crystal turbine blade, and the geometric data may be obtained by performing a three-dimensional scan on the solid single crystal turbine blade, or may be determined by a UG model, a CAD model, or a geometric drawing of the solid single crystal turbine blade. Establishing a single crystal turbine blade design model based on the geometric data of the solid single crystal turbine blade may make the structural geometric form, size, and stress distribution of the single crystal turbine blade design model as consistent as possible with those of the solid single crystal turbine blade, thereby better simulating the relevant characteristics of the turbine blade, and thereby improving the simulation effect of the single crystal turbine blade design model.

[0043] In step S220, the single crystal turbine blade design model is imported into the finite element analysis software, and the single crystal turbine blade design model is cut and redundant features are deleted to obtain a single crystal turbine blade three-dimensional model.

[0044] Among them, the finite element analysis software can be ANSYS, ABAQUS and other related finite element analysis software. Specifically, the single crystal turbine blade design model is imported into the finite element analysis software, and opened in the model editing module, the model is cut, redundant parts and small features that do not affect the analysis results are deleted, and the creation of the single crystal turbine blade three-dimensional model is completed. In the embodiment of the present disclosure, based on the principle of symmetrical structure modal analysis, it is only necessary to create a single crystal turbine blade design model of a single blade to complete the overall modal analysis. Among them, through the design model of the single blade and the simplification of the model, the number of meshes of the finite element model can be minimized, while reducing the time required for simulation solution, reducing the size of the simulation project file, and thereby improving the efficiency of vibration response analysis.

[0045] Next reference Figure 1 In step S120, a vibration response analysis is performed on the three-dimensional model of the single crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotation speeds of the single crystal turbine blade at different pitch numbers.

[0046] Specifically, according to the influence of speed, temperature, air pressure and other conditions on the vibration of single crystal turbine blades in daily work, the vibration response analysis of single crystal turbine blades under three-dimensional random orientation deviation can be performed based on finite element analysis software to extract the frequency and vibration mode corresponding to different working speeds of single crystal turbine blades under different pitch numbers. Among them, the pitch number can represent the engine pitch number corresponding to the single crystal turbine blade.

[0047] In some embodiments, the vibration response analysis of the single crystal turbine blade three-dimensional model under three-dimensional random orientation deviation can be performed to obtain the frequency and vibration mode corresponding to different rotation speeds of the turbine blade at different pitch numbers, including the following: Figure 3 Steps S310 to S320 are shown, wherein:

[0048] In step S310, a static analysis module is created, and a static analysis is performed on the three-dimensional model of the single crystal turbine blade based on the static analysis module to obtain the maximum equivalent stress of the single crystal turbine blade at different speeds to determine whether the single crystal turbine blade meets the design requirements.

[0049] The static analysis may refer to analyzing the response of a single crystal turbine blade under a fixed load (i.e., a static load). In some embodiments, creating a static analysis module specifically includes the following steps: importing temperature and air pressure data into a finite element analysis software, meshing the single crystal turbine blade three-dimensional model and applying constraint boundary conditions, setting stress and strain result output, and completing the creation of the static analysis module.

[0050] Specifically, creating a static analysis module can mainly include adding single crystal turbine blade materials, importing models, importing temperature and air pressure data, meshing the single crystal turbine blade three-dimensional model and applying constraint boundary conditions, defining temperature and air pressure and speed loads, and setting stress and strain result output. In some embodiments, adding single crystal turbine blade materials can include: considering the creation of temperature loads, aerodynamic loads, and rotational loads, and the constants of the added single crystal turbine blade materials mainly include elastic modulus, Poisson's ratio, density, thermal conductivity, and specific heat capacity. In some embodiments, importing temperature and air pressure data mainly includes: importing the temperature and air pressure values ​​of the area where the single crystal turbine blade three-dimensional model is located in the form of text, wherein the content of the text mainly includes the coordinate position and the corresponding temperature or air pressure value. In addition, a temperature load is created by importing temperature field data, and an air pressure load is created by importing air pressure data. At the same time, the engine works under different speed conditions to create a rotation load. The initial rotation speed of the single crystal turbine blade is set to 0rpm for static analysis, and the dynamic analysis of the working speed can be completed by updating the rotation speed later. After the calculation is completed, the maximum equivalent stress of the single crystal turbine blade at different speeds is obtained, and whether the single crystal turbine blade meets the design requirements is judged based on the maximum equivalent stress. Specifically, the maximum equivalent stress can be compared with the stress threshold. If the maximum equivalent stress is not greater than the stress threshold, it means that the single crystal turbine blade meets the design requirements.

[0051] In step S320, a modal analysis module is created based on the static analysis module, and a vibration response analysis is performed on the three-dimensional model of the single-crystal turbine blade based on the modal analysis module to obtain the frequency and vibration mode corresponding to different rotation speeds of the single-crystal turbine blade at different pitch numbers.

[0052] In some embodiments, a modal analysis module is created based on a static analysis module, specifically comprising the following steps: based on the static analysis module, defining the modal analysis load, selecting the number of node diameters for output results, setting stress-strain result output and solution calculation, and completing the creation of the modal analysis module.

[0053] In some embodiments, when performing vibration response analysis on a three-dimensional model of a single crystal turbine blade, a data extension module, a static analysis module, and a modal analysis module can be created first, and then the data of each module can be associated to achieve the transmission of extended data to static analysis and the inheritance of static analysis results by modal analysis.

[0054] Next reference Figure 1 In step S130, a Campbell diagram is created based on the corresponding relationship between the rotation speed and the frequency, and a resonance margin tolerance range and an excitation line are added to the Campbell diagram.

[0055] The resonance margin tolerance range may represent the allowable range of the resonance margin of the single crystal turbine blade, and the excitation line may represent the relationship between the vibration frequency and the operating speed.

[0056] In some embodiments, a Campbell diagram is created based on the correspondence between the rotational speed and the frequency, and a resonance margin tolerance range and an excitation line are added to the Campbell diagram, specifically comprising the following steps: creating a Campbell diagram with a node diameter number of zero based on the correspondence between the rotational speed and the frequency; performing a resonance margin calculation based on the resonance rotational speed and the operating rotational speed to determine the resonance margin tolerance range; performing an excitation line calculation based on the harmonic coefficient and the operating rotational speed to obtain the excitation line; and adding the resonance margin tolerance range and the excitation line to the Campbell diagram.

[0057] Specifically, according to the frequencies and vibration modes corresponding to the different rotation speeds of the single crystal turbine blades at different pitch diameters obtained in step S120, a corresponding relationship between the rotation speed and the frequency is created as follows: Figure 4 The Campbell diagram with zero node diameter is obtained, and the resonance margin tolerance range and excitation line are added to the Campbell diagram. i = k*Fe, where F i is the vibration frequency, k is the harmonic coefficient, and Fe is the natural frequency. In the Campbell diagram, the intersection of the natural frequency and the excitation frequency is the resonance point, and the corresponding speed is the resonance speed. Theoretically, it is difficult for the working speed to coincide with the resonance speed, and resonance will not occur. However, when the working speed and the resonance speed meet When the single crystal turbine blade will resonate, M is the resonance margin, R i is the resonant speed, R e is the operating speed. Then, the resonance margin tolerance of the single crystal turbine blade can be obtained based on the resonance margin and the operating speed: (1±M)*R e , where M can be the maximum resonance margin, and for example, M can be 0.1. The calculation formula of the excitation line is: Among them, F is the vibration frequency, k is the harmonic coefficient, R e is the operating speed. After the resonance margin tolerance range and the excitation line are calculated, the resonance margin tolerance range and the excitation line are added to the Campbell diagram for subsequent resonance possibility judgment.

[0058] In step S140, the intersection of the frequency line and the excitation line on the Campbell diagram is determined, and in response to the intersection being within the resonance margin tolerance range, it is determined that there is a possibility of resonance in the single crystal turbine blade.

[0059] Specifically, the resonance is judged by whether the intersection of the frequency line and the excitation line is within the resonance margin tolerance range. If the intersection of the frequency line and the excitation line is within the resonance margin tolerance range, it is determined that the single crystal turbine blade has the possibility of resonance, such as Figure 4Point B in the figure; if the intersection of the frequency line and the excitation line is not within the resonance margin tolerance range, it is determined that there is no possibility of resonance in the single crystal turbine blade, such as Figure 4 Point A in the figure. Through the Campbell diagram and the resonance margin tolerance, it is possible to intuitively and quickly determine whether there is a possibility of resonance in the single crystal turbine blade.

[0060] In some embodiments, if the single crystal turbine blade has the possibility of resonance, the damage degree caused by the resonance can be determined according to the size and deformation of the resonance frequency vibration mode in response to the possibility of resonance of the single crystal turbine blade, so as to better understand the risk of resonance.

[0061] refer to Figure 5 As shown in , another vibration response analysis method of a single crystal turbine blade under three-dimensional random orientation deviation in an embodiment of the present disclosure may specifically include the following steps:

[0062] Step S510, importing the single crystal turbine blade design model into finite element analysis software and simplifying the model to obtain a single crystal turbine blade three-dimensional model;

[0063] Step S520, creating materials in finite element analysis software, importing temperature and air pressure data, meshing the single crystal turbine blade three-dimensional model and applying constraint boundary conditions, and setting stress and strain result output;

[0064] Step S530, applying temperature, air pressure, rotation load and output to the single crystal turbine blade three-dimensional model in the finite element analysis software, defining the modal analysis load, selecting the number of node diameters for output results, setting the stress and strain result output and solving the calculation;

[0065] Step S540, performing static analysis and vibration response analysis to obtain the frequency and vibration mode of the single crystal turbine blade at different rotation speeds with different pitch numbers;

[0066] Step S550, creating a Campbell diagram based on the corresponding relationship between the rotation speed and the frequency, and adding a resonance margin tolerance range and an excitation line to the Campbell diagram;

[0067] Step S560, determining the intersection of the frequency line and the excitation line on the Campbell diagram, and in response to the intersection being within the resonance margin tolerance range, determining the possibility of resonance of the single crystal turbine blade.

[0068] In the vibration response analysis of the single-crystal turbine blade under three-dimensional random orientation deviation provided in the above embodiment, based on the principle of symmetrical structure modal analysis, it is only necessary to create a single-blade three-dimensional solid model to complete the overall modal analysis. The single-blade model simulation can minimize the number of meshes in the finite element model, while reducing the time required for simulation solution and reducing the size of the simulation project file; in addition, modal simulation analysis is performed on the single-crystal turbine blade. The single-crystal turbine blade is affected by a complex environment during operation. When creating a finite element simulation model, it is necessary to apply speed, temperature field, and air pressure field loads at the same time. The comprehensive analysis results of multiple working conditions are closer to the actual effect, ensuring the authenticity of the vibration characteristic analysis; in addition, based on the speed-frequency Cambé diagram, it is judged whether the single-crystal turbine blade has the possibility of resonance. The resonance margin tolerance is drawn on the Cambé diagram, and the resonance is judged by observing the intersection position of the frequency line and the excitation line. The calculation of the resonance margin value and the result judgment of each excitation frequency intersection are omitted, which saves data processing time and improves the comprehensiveness of the vibration response analysis results.

[0069] In the technical solution provided by the embodiment of the present disclosure, on the one hand, the single crystal turbine blade design model is imported into the finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade and perform vibration response analysis, wherein the simplified three-dimensional model of the single crystal turbine blade can minimize the number of meshes of the finite element model, while shortening the time required for simulation solution and reducing the size of the simulation project file. On the other hand, a resonance margin tolerance range and an excitation line are added to the Campbell diagram, and based on the intersection of the frequency line and the excitation line on the Campbell diagram and the resonance margin tolerance, the resonance possibility of the single crystal turbine blade is judged, which saves data processing time and improves the accuracy and comprehensiveness of the vibration response analysis results, thereby being able to more intuitively and quickly judge whether there is a possibility of resonance in the single crystal turbine blade.

[0070] Next, in the embodiment of the present disclosure, a vibration response analysis device for a single crystal turbine blade under three-dimensional random orientation deviation is provided, referring to Figure 6As shown in , the vibration response analysis device 600 for a single crystal turbine blade under three-dimensional random orientation deviation can be composed of a three-dimensional model creation module 601, a vibration response analysis module 602, a tolerance range addition module 603 and a resonance possibility determination module 604, wherein: the three-dimensional model creation module 601 can be used to import the single crystal turbine blade design model into the finite element analysis software and simplify the model to obtain a three-dimensional model of the single crystal turbine blade; the vibration response analysis module 602 can be used to perform a vibration response analysis on the three-dimensional model of the single crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotation speeds of the single crystal turbine blade under different number of node diameters; the tolerance range addition module 603 can be used to create a Campbell diagram based on the corresponding relationship between the rotation speed and the frequency, and add a resonance margin tolerance range and an excitation line to the Campbell diagram; the resonance possibility determination module 604 can be used to determine the intersection of the frequency line and the excitation line on the Campbell diagram, and in response to the intersection being within the resonance margin tolerance range, it is determined that there is a possibility of resonance in the single crystal turbine blade.

[0071] In an exemplary embodiment of the present disclosure, the three-dimensional model creation module may include: a design model determination unit, which can be used to create a single crystal turbine blade design model based on a solid single crystal turbine blade; a model simplification unit, which can be used to import the single crystal turbine blade design model into a finite element analysis software, and perform model cutting and redundant feature deletion on the single crystal turbine blade design model to obtain a single crystal turbine blade three-dimensional model.

[0072] In an exemplary embodiment of the present disclosure, the vibration response analysis module may include: a static analysis unit, which can be used to create a static analysis module, and perform static analysis on a three-dimensional model of a single-crystal turbine blade based on the static analysis module to obtain the maximum equivalent stress of the single-crystal turbine blade at different speeds to determine whether the single-crystal turbine blade meets the design requirements; a frequency and vibration mode acquisition unit, which can be used to create a modal analysis module based on the static analysis module, and perform vibration response analysis on the three-dimensional model of a single-crystal turbine blade based on the modal analysis module to obtain the frequency and vibration mode corresponding to different speeds of the single-crystal turbine blade at different pitch numbers.

[0073] In an exemplary embodiment of the present disclosure, the static analysis unit may include: a static analysis module creation sub-unit, which can be used to import temperature and air pressure data in the finite element analysis software, while meshing the single crystal turbine blade three-dimensional model and applying constraint boundary conditions, setting stress and strain result output, and completing the creation of the static analysis module.

[0074] In an exemplary embodiment of the present disclosure, the frequency and vibration mode acquisition unit may include: a modal analysis module creation subunit, which can be used to define the modal analysis load, select the number of node diameters for output results, set the stress and strain result output and solution calculation on the basis of the static analysis module, and complete the creation of the modal analysis module.

[0075] In an exemplary embodiment of the present disclosure, the tolerance range adding module may include: a Campbell diagram creating unit, which can be used to create a Campbell diagram with a node diameter number of zero based on the corresponding relationship between the rotational speed and the frequency; a resonance margin tolerance range determining unit, which can be used to calculate the resonance margin according to the resonance rotational speed and the operating rotational speed, and determine the resonance margin tolerance range; an excitation line acquiring unit, which can be used to calculate the excitation line according to the harmonic coefficient and the operating rotational speed, and obtain the excitation line; a data adding unit, which can be used to add the resonance margin tolerance range and the excitation line to the Campbell diagram.

[0076] In an exemplary embodiment of the present disclosure, the vibration response analysis device under the three-dimensional random orientation deviation of the above-mentioned single crystal turbine blade may also include: a resonance damage degree judgment unit, which can be used to respond to the possibility of resonance in the single crystal turbine blade and judge the degree of damage caused by the resonance according to the size and deformation of the resonance frequency vibration mode.

[0077] It should be noted that the specific details of each part of the above-mentioned single-crystal turbine blade vibration response analysis device under three-dimensional random orientation deviation have been described in detail in the implementation method of the single-crystal turbine blade vibration response analysis method under three-dimensional random orientation deviation. The undisclosed details can be found in the implementation method content of the method part, and will not be repeated here.

[0078] In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

[0079] Those skilled in the art will appreciate that various aspects of the present disclosure may be implemented as systems, methods or program products. Therefore, various aspects of the present disclosure may be specifically implemented in the following forms, namely: complete hardware implementation, complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to herein as "circuits", "modules" or "systems".

[0080] Refer to the following Figure 7 An electronic device 700 according to this embodiment of the present disclosure is described. Figure 7 The electronic device 700 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0081] like Figure 7As shown, the electronic device 700 is in the form of a general computing device. The components of the electronic device 700 may include, but are not limited to: the at least one processing unit 710, the at least one storage unit 720, a bus 730 connecting different system components (including the storage unit 720 and the processing unit 710), and a display unit 740.

[0082] The storage unit stores program codes, which can be executed by the processing unit 710, so that the processing unit 710 performs the steps according to various exemplary embodiments of the present disclosure described in the above “Exemplary Method” section of this specification. For example, the processing unit 710 can perform the following steps: Figure 1 Follow the steps shown in .

[0083] The storage unit 720 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 7201 and / or a cache storage unit 7202 , and may further include a read-only storage unit (ROM) 7203 .

[0084] The storage unit 720 may also include a program / utility 7204 having a set (at least one) of program modules 7205, such program modules 7205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0085] Bus 730 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0086] The electronic device 700 may also communicate with one or more external devices 800 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 700, and / or communicate with any device that enables the electronic device 700 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 750. Furthermore, the electronic device 700 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 760. As shown, the network adapter 760 communicates with other modules of the electronic device 700 via a bus 730. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 700, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0087] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or an electronic device, etc.) to execute the method according to the implementation of the present disclosure.

[0088] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary implementations of the present disclosure described in the above "Exemplary Method" section of the present specification.

[0089] According to the program product for implementing the above method in the embodiment of the present disclosure, it can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0090] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable 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 above.

[0091] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0092] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0093] Program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0094] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0095] Other embodiments of the present disclosure will be readily apparent to those skilled in the art after considering the specification and practicing the inventions invented herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not invented by the present disclosure. The specification and examples are to be considered merely exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0096] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vibration response analysis method for a single crystal turbine blade under three-dimensional random orientation deviation, characterized in that: include: The single crystal turbine blade design model is imported into the finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade; Performing vibration response analysis on the three-dimensional model of the single crystal turbine blade under three-dimensional random orientation deviation to obtain frequencies and vibration modes corresponding to different rotation speeds of the single crystal turbine blade at different pitch numbers; Creating a Campbell diagram based on the corresponding relationship between the rotation speed and the frequency, and adding a resonance margin tolerance range and an excitation line to the Campbell diagram; An intersection point between the frequency line on the Campbell diagram and the excitation line is determined, and in response to the intersection point being within the resonance margin tolerance range, it is determined that there is a possibility that the single crystal turbine blade has resonance.

2. The method according to claim 1, characterized in that The single crystal turbine blade design model is imported into the finite element analysis software and the model is simplified to obtain a three-dimensional model of the single crystal turbine blade, including: Creating the single crystal turbine blade design model according to the solid single crystal turbine blade; The single crystal turbine blade design model is imported into finite element analysis software, and the single crystal turbine blade design model is subjected to model cutting and redundant feature deletion to obtain a three-dimensional model of the single crystal turbine blade.

3. The method according to claim 1, characterized in that The vibration response analysis of the single crystal turbine blade three-dimensional model under three-dimensional random orientation deviation is performed to obtain the frequency and vibration mode corresponding to different rotation speeds of the turbine blade under different pitch numbers, including: Creating a static analysis module, and performing a static analysis on the three-dimensional model of the single crystal turbine blade based on the static analysis module to obtain the maximum equivalent stress of the single crystal turbine blade at different speeds, so as to determine whether the single crystal turbine blade meets the design requirements; A modal analysis module is created based on the static analysis module, and a vibration response analysis is performed on the three-dimensional model of the single-crystal turbine blade based on the modal analysis module to obtain the frequency and vibration mode corresponding to different rotation speeds of the single-crystal turbine blade at different pitch numbers.

4. The method according to claim 3, characterized in that The step of creating a static analysis module includes: The temperature and air pressure data are imported into the finite element analysis software, and the single crystal turbine blade three-dimensional model is meshed and constraint boundary conditions are applied, and the stress and strain result output is set to complete the creation of the static analysis module.

5. The method according to claim 3, characterized in that: The step of creating a modal analysis module based on the static analysis module includes: On the basis of the static analysis module, the modal analysis load is defined, the number of node diameters for output results is selected, the stress-strain result output and solution calculation are set, and the creation of the modal analysis module is completed.

6. The method according to claim 1, characterized in that The step of creating a Campbell diagram based on the corresponding relationship between the rotation speed and the frequency, and adding a resonance margin tolerance range and an excitation line to the Campbell diagram, comprises: Creating a Campbell diagram with a pitch number of zero based on the corresponding relationship between the rotational speed and the frequency; Calculating the resonance margin according to the resonance speed and the operating speed to determine the resonance margin tolerance range; Calculate the excitation line according to the harmonic coefficient and the working speed to obtain the excitation line; The resonance margin tolerance range and the excitation line are added to the Campbell diagram.

7. The method according to claim 1, characterized in that The method further comprises: In response to the possibility of resonance of the single crystal turbine blade, the degree of damage caused by the resonance is determined based on the size and deformation of the resonance frequency vibration mode.

8. A vibration response analysis device for single crystal turbine blades under three-dimensional random orientation deviation, characterized in that: include: A three-dimensional model creation module is used to import the single-crystal turbine blade design model into the finite element analysis software and simplify the model to obtain a three-dimensional model of the single-crystal turbine blade; A vibration response analysis module is used to perform vibration response analysis on the three-dimensional model of the single-crystal turbine blade under three-dimensional random orientation deviation to obtain the frequency and vibration mode corresponding to different rotation speeds of the single-crystal turbine blade under different pitch numbers; A tolerance range adding module, used for creating a Campbell diagram based on the corresponding relationship between the rotation speed and the frequency, and adding a resonance margin tolerance range and an excitation line on the Campbell diagram; The resonance possibility determination module is used to determine the intersection of the frequency line on the Campbell diagram and the excitation line, and in response to the intersection being within the resonance margin tolerance range, determine the possibility of resonance of the single crystal turbine blade.

9. An electronic device, characterized in that: include: processor; as well as A memory, configured to store executable instructions of the processor; The processor is configured to perform the method of any one of claims 1 to 7 by executing the executable instructions.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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