Design method and device of turbine case connection part feature simulation piece

Abstract

The invention provides a design method and device for a characteristic simulation part of a connection part of a turbine casing, and relates to the technical field of aircraft component design, and the method comprises the steps: building a finite element analysis model of the turbine casing according to related parameters of the turbine casing, and obtaining a first principal stress distribution condition of a bolt connection part in the turbine casing; establishing a geometric model of the turbine casing bolt connection simulation piece; establishing a finite element calculation model of the turbine case bolted connection simulation part, and calculating the static strength of the turbine case bolted connection simulation part under the uniaxial tensile boundary condition to obtain a first principal stress distribution condition; and adjusting the geometric parameter design of the bolt connection simulation piece, and outputting a final geometric model of the turbine casing bolt connection simulation piece. The geometric parameter design of the bolted connection simulation piece is adjusted by taking the consistency of the distribution conditions of the first principal stress at the bolt connection part of the cartridge receiver and the simulation piece as a target, so that the accuracy of the simulation piece with the cartridge receiver bolted connection characteristic is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft component design, and in particular to a design method and device for a characteristic simulation part of a turbine casing connection portion. Background Art

[0002] The turbine casing is the main load-bearing component of an aircraft engine. It is a key component for the engine to bear loads and containment. Its structure is a typical thin-walled structural part. Under its complex service conditions, the turbine casing itself has to withstand high temperature, high pressure and airflow excitation force. It is one of the structures with the worst environment in the aircraft engine load-bearing structure system, so it is very easy to produce problems such as fatigue and creep failure.

[0003] The features considered in the simulation design were not comprehensive enough, resulting in poor accuracy of the simulation of the receiver bolt connection features. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, the first objective of the present application is to propose a design method for a characteristic simulation part of a turbine casing connection portion.

[0006] The second object of the present application is to provide a device.

[0007] The third objective of the present application is to provide an electronic device.

[0008] A fourth objective of the present application is to provide a computer-readable storage medium.

[0009] A fifth object of the present application is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a design method for a turbine casing connection part feature simulation part, comprising:

[0011] Establishing a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, performing a static strength analysis and calculation of the casing, and obtaining the first principal stress distribution of the bolt connection part in the turbine casing;

[0012] Determine the basic implementation method of the bolt connection simulation part and establish the geometric model of the turbine casing bolt connection simulation part;

[0013] Determine the load and boundary conditions of the simulated parts of the bolted connection parts, establish a finite element calculation model of the turbine casing bolted connection simulated parts, and perform static strength calculation of the turbine casing bolted connection simulated parts under uniaxial tensile boundary conditions to obtain the first principal stress distribution;

[0014] The geometric parameter design of the bolt connection simulation component is adjusted with the goal of making the first principal stress distribution consistent with the first principal stress distribution, and the final geometric model of the turbine casing bolt connection simulation component is output.

[0015] Optionally, establishing a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing includes:

[0016] According to the influence of the complex loads and boundary conditions on the turbine casing, the inverse distance weighted average method is used to perform temperature interpolation to establish a finite element analysis model of the turbine casing.

[0017] Optionally, obtaining the first principal stress distribution of the bolt connection portion in the turbine casing includes:

[0018] For the characteristic part of the bolt installation hole, a circular path is selected along the gradient direction of the stress cloud map surface in the finite element post-processing;

[0019] For dangerous parts, an optimal path is selected along the gradient direction of the stress cloud map surface in finite element post-processing, and the change of stress value with distance under the optimal path is plotted, and then normalized, and the optimal path is used as the first principal stress distribution corresponding to the characteristic simulation part of the dangerous part;

[0020] For bolts, extract the internal force and internal moment magnitude and direction of the bolt section.

[0021] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a design device for a turbine casing connection part feature simulation part, comprising:

[0022] A first calculation module is used to establish a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, perform static strength analysis and calculation of the casing, and obtain the first principal stress distribution of the bolt connection part in the turbine casing;

[0023] A model building module is used to determine the basic implementation method of the bolt connection part simulation part and establish the geometric model of the turbine casing bolt connection simulation part;

[0024] The second calculation module is used to determine the load and boundary conditions of the simulated parts of the bolt connection part, establish a finite element calculation model of the turbine casing bolt connection simulated parts, and perform static strength calculation of the turbine casing bolt connection simulated parts under uniaxial tension boundary conditions to obtain the first principal stress distribution;

[0025] The optimization module is used to adjust the geometric parameter design of the bolt connection simulation component with the goal of making the first principal stress distribution consistent with the first principal stress distribution, and output a final geometric model of the turbine casing bolt connection simulation component.

[0026] To achieve the above-mentioned purpose, the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0027] The memory stores computer-executable instructions;

[0028] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0029] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a computer-readable storage medium, in which computer-readable storage medium is stored computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the method as described in any one of the first aspects.

[0030] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, which implements any method in the first aspect when executed by a processor.

[0031] The design method, device, electronic device and storage medium of the turbine casing connection part feature simulation part provided in the present application improve the accuracy of the simulation part of the casing bolt connection feature by adjusting the geometric parameter design of the bolt connection simulation part with the goal of making the first principal stress distribution consistent with the first principal stress distribution.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 A schematic flow chart of a method for designing a turbine casing connection feature simulation component provided in an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the force on the turbine casing bolts;

[0036] Figure 3 Simulate the geometry of the turbine case bolt connection;

[0037] Figure 4 is the normalized principal stress gradient curve;

[0038] Figure 5 is the normalized principal stress gradient curve;

[0039] Figure 6Assembly drawing of the turbine case bolt connection simulation and test fixture;

[0040] Figure 7 A schematic diagram of the structure of a design device for simulating a characteristic part of a turbine casing connection portion provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0042] The turbine casing is the main load-bearing component of an aircraft engine. It is a key component for the engine to bear loads and containment. Its structure is a typical thin-walled structural part. Under its complex service conditions, the turbine casing itself has to withstand high temperature, high pressure and airflow excitation force. It is one of the structures with the worst environment in the load-bearing structural system of an aircraft engine, so it is very prone to problems such as fatigue and creep failure. At the beginning of its design, the turbine casing itself had a relatively complex geometric shape and assembly form in order to meet the harsh working conditions and aerodynamic requirements. A typical turbine casing structure is a full-ring assembly type. During service, the casing rigidity should be uniform, without warping, cracking and other problems. The deformation of the casing should be controlled to ensure coordination with the deformation of the rotor blades and to control the tip clearance.

[0043] According to existing research results and related test results, the connection between the various parts of the assembled casing is mainly bolted. The strength of the connection structure determines the safety of the entire casing, which is related to the performance and reliability of the engine. In February 2018, a Boeing 777 passenger plane of United Airlines was flying at high altitude. The broken blades collided with the bolted connection of the load-bearing component at high speed under the action of centrifugal force, causing most of the engine inlet to fall off. Therefore, the strength of the bolted connection of the turbine casing has become the focus of the casing containment research. At present, there are few studies on the bolted connection of the casing. From the perspective of engineering feasibility, designing a bolted connection structure simulation part to accurately simulate the stress distribution of the dangerous parts of the casing bolt connection is of practical significance for improving the fatigue life of the casing.

[0044] In terms of simulation part design methods, Chen Xinjie et al. adhered to the following three principles in the design of hybrid feature simulation parts of turbine blades: ① Geometric equivalence and similarity. That is, the geometric shape of the equivalent design part of the simulation part is similar to that of the corresponding part of the real blade; ② The same processing technology. That is, the molding process conditions of the simulation part are the same as those of the real blade, and the microstructure is similar to the corresponding part of the blade; ③ The same load conditions. That is, the load of equivalent service conditions is applied, the maximum stress of the simulation part is the same, and the stress gradient or stress concentration factor in a certain area near the maximum stress point is ensured to be equivalent. This is also the basic idea and default criterion for the design of general feature simulation parts. Let's take another example. Hu Dianyin et al., a design method for a centrifugal impeller center hole crack extension feature simulation part, similar to the previous one. Yan Junwei et al., CMC guide blade blade-edge plate connection area feature simulation part design and experimental method, although it is considered to be a connection area, the entire blade is still an integrated structure, and does not involve connection features such as bolts.

[0045] However, the aforementioned simulation component designs did not take the connection characteristics into consideration, resulting in low accuracy of the designed simulation components.

[0046] At present, there are few studies on the design methods of turbine casing bolt connection feature simulation parts, especially the geometric features of the two parts of the bolt connection are relatively complex. The turbine casing is subjected to the combined effects of high temperature, high pressure and high-speed airflow during its service, and the service environment is extremely harsh. For various reasons, the failure modes and failure locations of the turbine casing bolt connection structure are diverse. Excluding the adverse effects of foreign objects hitting, material defects and processing technology, common failures are mainly fatigue-related fatigue fracture failures, including: low-cycle fatigue failure, high-cycle fatigue failure, vibration fatigue failure, high-temperature creep fatigue failure, high-low cycle composite fatigue failure, etc. At present, most of the feature simulation parts and their design methods are aimed at simple geometric features and single failure locations, and most of them are in the form of plates. Obviously, the plate simulation part design method is invalid for complex bolt connection structures and is not enough to simulate complex stress states. Therefore, it is very important to propose a turbine casing simulation part design method that takes into account complex connection features, so as to propose the specific work involved in the present invention.

[0047] The present application provides a method for designing a turbine casing connection feature simulation component. Figure 1 A schematic diagram of a design method for a turbine casing connection feature simulation component provided in an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0048] Step 101, establishing a finite element analysis model of a turbine casing according to relevant parameters of the turbine casing, performing a casing static strength analysis calculation and obtaining a first principal stress distribution of a bolt connection portion in the turbine casing;

[0049] Step 102, determining a basic implementation method of a bolt connection part simulation component, and establishing a geometric model of a turbine casing bolt connection simulation component;

[0050] Step 103, determining the load and boundary conditions of the bolt connection part simulation component, establishing a finite element calculation model of the turbine casing bolt connection simulation component, and performing static strength calculation of the turbine casing bolt connection simulation component under uniaxial tension boundary conditions to obtain the first principal stress distribution;

[0051] Step 104 , adjusting the geometric parameter design of the bolt connection simulation component with the goal of making the first principal stress distribution consistent with the first principal stress distribution, and outputting a final geometric model of the turbine casing bolt connection simulation component.

[0052] In this embodiment, the influence of complex loads and boundary conditions such as aerodynamics and temperature on the turbine casing is taken into consideration, the inverse distance weighted average method is adopted, the temperature interpolation work is carried out using the interpolation program, the turbine casing finite element analysis model is established, and the casing static strength analysis and calculation work is carried out.

[0053] Optionally, the step 101 establishes a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, including:

[0054] According to the influence of the complex loads and boundary conditions on the turbine casing, the inverse distance weighted average method is used to perform temperature interpolation to establish a finite element analysis model of the turbine casing.

[0055] Optionally, the step 101 of obtaining the first principal stress distribution of the bolt connection part in the turbine casing includes:

[0056] For the characteristic part of the bolt installation hole, a circular path is selected along the gradient direction of the stress cloud map surface in the finite element post-processing;

[0057] For dangerous parts, an optimal path is selected along the gradient direction of the stress cloud map surface in finite element post-processing, and the change of stress value with distance under the optimal path is plotted, and then normalized, and the optimal path is used as the first principal stress distribution corresponding to the characteristic simulation part of the dangerous part;

[0058] For bolts, extract the internal force and internal moment magnitude and direction of the bolt section.

[0059] In a possible embodiment, the method steps are as follows:

[0060] Step 1: Considering the influence of complex loads and boundary conditions such as aerodynamics and temperature on the turbine blades, the inverse distance weighted average method is adopted, and the temperature interpolation work is carried out using interpolation software. A finite element analysis model of the turbine casing is established, and static strength analysis and calculation of the casing are carried out.

[0061] Step 2: Based on the finite element static strength calculation results of the turbine casing in step 1 above, extract the cross-sectional internal forces and internal moments of the casing bolt connection parts, as well as the stress distribution, determine the dangerous points and stress characteristics near the local features, and determine the maximum stress value.

[0062] Figure 2 It is a schematic diagram of the force condition of a turbine casing bolt. Figure 2 As shown, the dangerous point of the bolt connection part of the casing is mainly at the root of the bolt, and the bolt is subjected to eccentric and non-axial tensile load.

[0063] Step 3: Determine the basic method to realize the simulation of the receiver bolt connection, that is, consider the local characteristics and key design parameters, retain the bolt hole diameter at the receiver connection structure, all the geometric features of the nut mounting hole, and the inclination angle between the connection surfaces. Figure 1 The geometry model of the turbine case bolt connection simulation is as follows: Figure 3 As shown, in order to facilitate processing and testing, the simulation part is divided into three parts: part 1 simulating the support plate part, part 2 simulating the outer casing part, and the bolt connection part. Among them, the vertical eccentric position of the bolt needs to be determined based on calculation iteration.

[0064] Step 4: Determine the load and boundary conditions of the turbine casing bolt connection simulation, establish a finite element calculation model of the turbine casing bolt connection simulation, and carry out static strength analysis and calculation of the bolt connection simulation under uniaxial tension boundary conditions; the contact surfaces between part 1 and part 2, between the fixture and the fixture pin and the simulation are friction contacts with a friction coefficient of 0.1; the contact mode between the bolt hole connection structure and part 1 and part 2 remains consistent with the contact mode calculated for the casing; based on the calculation results of the casing, apply a fixed support constraint to the right hole of part 1, apply axial tension to the left side of part 2, and apply uniform temperature to the simulation.

[0065] Step 5: Compare the finite element calculation results of the bolt connection simulation part and the turbine casing. For different characteristic parts, select an optimal path along the surface or internal gradient direction of the stress cloud map in the finite element post-processing, plot the change of stress value with distance under this path, and then perform normalization processing. Use this curve as the design target of stress gradient and stress distribution of the characteristic simulation part of this part; in addition, determine the final design parameters by iteratively calculating the inclination angle of part 2 and the eccentric position of the bolt.

[0066] Iterative calculation process of the inclination angle and eccentricity of the simulated bolt: First, the inclination angle of the bolt is kept constant at 84°, the size of the eccentricity is changed, and the ratio of the cross-sectional internal force to the internal moment is compared. It is found that the eccentricity that needs to be designed exceeds the width of the simulated part. Obviously, this will cause the width of the simulated part to be too large, which is not easy to process and test. Therefore, we consider the inclination angle between the connecting surfaces to be 73°, which is the same as the inclination angle between the outer ring and the support plate on the receiver. Then the eccentricity is calculated iteratively, and the ratio of the cross-sectional internal force to the internal moment is compared. When the eccentricity is 5mm, the ratio of the cross-sectional internal force to the internal moment of the simulated bolt is 3.38, which can accurately simulate the force condition of the bolt.

[0067] The first principal stress gradient curve around the output nut mounting hole is as follows: Figure 4 The normalized principal stress gradient curve is consistent. The first principal stress gradient curve of the weak point on the upper edge of part 1 is output as follows Figure 5 shown.

[0068] The normalized principal stress gradient curves are consistent.

[0069] Step 6: After determining the geometric configuration of the simulated part, the corresponding fixture design is carried out. The fixture design follows the principle of high strength, and the redundant design strength should be three times that of the simulated part to ensure that the fixture will not break during the test. In addition, considering that the upper and lower parts of the test machine are positive and negative threaded rods, the fixture design should also be positive and negative threaded. The assembly diagram of the fixture and the test part is as follows: Figure 6 shown.

[0070] In order to implement the above-mentioned embodiment, the present application also proposes a design device for a characteristic simulation part of a turbine casing connection portion. Figure 7 A schematic diagram of a design device for a turbine casing connection feature simulation component provided in an embodiment of the present application. Figure 7 As shown, the device comprises:

[0071] The first calculation module 710 is used to establish a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, perform a static strength analysis calculation of the casing and obtain the first principal stress distribution of the bolt connection part in the turbine casing;

[0072] A model building module 720 is used to determine a basic implementation method of a bolt connection part simulation component and establish a geometric model of a turbine casing bolt connection simulation component;

[0073] The second calculation module 730 is used to determine the load and boundary conditions of the bolt connection part simulation, establish a finite element calculation model of the turbine casing bolt connection simulation part, and perform static strength calculation of the turbine casing bolt connection simulation part under uniaxial tension boundary conditions to obtain the first principal stress distribution;

[0074] The optimization module 740 is used to adjust the geometric parameter design of the bolt connection simulation component with the goal of making the first principal stress distribution consistent with the first principal stress distribution, and output a final geometric model of the turbine casing bolt connection simulation component.

[0075] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0076] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0077] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0078] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0079] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0080] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0081] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0084] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0085] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0087] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0088] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for designing a turbine casing connection feature simulation part, comprising the following steps: Establishing a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, performing a static strength analysis and calculation of the casing, and obtaining the first principal stress distribution of the bolt connection part in the turbine casing; Determine the basic implementation method of the bolt connection simulation part and establish the geometric model of the turbine casing bolt connection simulation part; Determine the load and boundary conditions of the simulated parts of the bolted connection parts, establish a finite element calculation model of the turbine casing bolted connection simulated parts, and perform static strength calculation of the turbine casing bolted connection simulated parts under uniaxial tensile boundary conditions to obtain the first principal stress distribution; With the goal of making the first principal stress distribution at the bolt connection between the casing and the simulation component consistent, the geometric parameter design of the bolt connection simulation component is adjusted, and the final geometric model of the turbine casing bolt connection simulation component is output.

2. The method according to claim 1, characterized in that The step of establishing a turbine casing finite element analysis model according to turbine casing related parameters includes: According to the influence of the complex loads and boundary conditions on the turbine casing, the inverse distance weighted average method is used to perform temperature interpolation to establish a finite element analysis model of the turbine casing.

3. The method according to claim 2, characterized in that The obtaining of the first principal stress distribution of the bolt connection portion in the turbine casing includes: For the characteristic part of the bolt installation hole, a circular path is selected along the gradient direction of the stress cloud map surface in the finite element post-processing; For dangerous parts, an optimal path is selected along the gradient direction of the stress cloud map surface in finite element post-processing, and the change of stress value with distance under the optimal path is plotted, and then normalized, and the optimal path is used as the first principal stress distribution corresponding to the characteristic simulation part of the dangerous part; For bolts, extract the internal force and internal moment magnitude and direction of the bolt section.

4. A design device for a turbine casing connection feature simulation component, characterized in that: include: A first calculation module is used to establish a finite element analysis model of the turbine casing according to relevant parameters of the turbine casing, perform static strength analysis and calculation of the casing, and obtain the first principal stress distribution of the bolt connection part in the turbine casing; A model building module is used to determine the basic implementation method of the bolt connection part simulation part and establish the geometric model of the turbine casing bolt connection simulation part; The second calculation module is used to determine the load and boundary conditions of the simulated parts of the bolt connection part, establish a finite element calculation model of the turbine casing bolt connection simulated parts, and perform static strength calculation of the turbine casing bolt connection simulated parts under uniaxial tension boundary conditions to obtain the first principal stress distribution; The optimization module is used to adjust the geometric parameter design of the bolt connection simulation component with the goal of making the first principal stress distribution consistent with the first principal stress distribution, and output a final geometric model of the turbine casing bolt connection simulation component.

5. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 3 when executed by a processor.

7. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 3 when being executed by a processor.

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