Design method, device and equipment for characteristic simulation part of engine force transmission device

Abstract

The invention relates to a design method, device and equipment for a characteristic simulation part of an engine force transmission device, and relates to the technical field of characteristic simulation of liquid rocket engines, the method comprises the following steps: constructing a first geometric analysis model of the engine force transmission device, and calculating the characteristic simulation part of the engine force transmission device according to the first geometric analysis model; determining first stress distribution of the engine force transmission device under the service condition; determining a dangerous stress area of the engine force transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation part of the engine force transmission device according to the dangerous stress area; determining a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of a second geometric analysis model; and according to the first stress distribution gradient and the second stress distribution gradient, determining a characteristic simulation piece of the engine force transmission device. The safety and reliability of the engine force transmission device in the service process are improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of characteristic simulation of liquid rocket engines, and more specifically, to a design method for a characteristic simulation component of an engine force transmission device, a design device for a characteristic simulation component of an engine force transmission device, and an electronic device. Background Art

[0002] In recent years, many researchers have designed various types of characteristic simulations for the hot end components of aircraft and space engines, and have used these simulations to study their strength analysis and failure assessment under service conditions. However, no researchers have designed and studied characteristic simulations for the force transmission devices of reusable liquid rocket engines, which are also subject to extreme load conditions, especially those manufactured using additive manufacturing processes.

[0003] Therefore, it is particularly important to carry out the design and research of characteristic simulation parts of the additively manufactured force transmission device of reusable liquid rocket engines under extreme service conditions.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a design method for a characteristic simulation part of an engine force transmission device, a design device for a characteristic simulation part of an engine force transmission device, and an electronic device, thereby at least to a certain extent overcoming the problem of how to design the characteristic simulation part of an engine force transmission device due to the limitations and defects of related technologies.

[0006] According to one aspect of the present disclosure, a method for designing a characteristic simulation component of an engine force transmission device is provided, comprising:

[0007] Constructing a first geometric analysis model of the engine force transmission device, and determining a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model;

[0008] determining a dangerous stress region of the engine power transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation part of the engine power transmission device according to the dangerous stress region;

[0009] determining a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of the second geometric analysis model;

[0010] A characteristic simulation component of the engine force transmission device is determined according to the first stress distribution gradient and the second stress distribution gradient.

[0011] In an exemplary embodiment of the present disclosure, constructing a first geometric analysis model of an engine power transmission device includes:

[0012] Obtaining a force transmission geometry model of an engine force transmission device of an additively manufactured liquid rocket, and configuring a first thermodynamic performance parameter for the force transmission geometry model;

[0013] A first simulated service load under a simulated service condition is applied to the force transmission geometric model, and a first geometric analysis model of the engine force transmission device is constructed based on the force transmission geometric model, the first thermodynamic performance parameter and the first simulated service load.

[0014] In an exemplary embodiment of the present disclosure, the first thermodynamic performance parameter includes at least one of the elastic modulus, Poisson's ratio, tensile strength, yield strength of the material used to prepare the engine power transmission device, and thermal conductivity and thermal expansion coefficient of the engine power transmission device under the operating temperature field;

[0015] The simulated service condition is obtained by simulating the actual service condition of the engine power transmission device of the liquid rocket, and the first simulated service load includes at least one of the temperature field load, gas pressure load and pipeline support force load that the engine power transmission device is subjected to during the service process.

[0016] In an exemplary embodiment of the present disclosure, determining a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model includes:

[0017] Performing heat transfer analysis on the first geometric analysis model to obtain a first temperature field analysis result, and importing the first temperature field analysis result into a predetermined field for static analysis of the engine power transmission device;

[0018] In the predetermined static analysis field, a first thermal-mechanical coupling calculation result is determined by combining the first temperature field analysis result, the gas pressure load and the pipeline support force load borne by the engine power transmission device during service;

[0019] A first stress distribution of the engine force transmission device under a service condition is determined based on the first thermal-mechanical coupling calculation result.

[0020] In an exemplary embodiment of the present disclosure, performing heat transfer analysis on the first geometric analysis model to obtain a first temperature field analysis result includes:

[0021] Configuring temperature parameters for the first geometric analysis model; wherein the external temperature parameter of the first geometric analysis model is 0° C., and the internal temperature parameter of the first geometric analysis model is 400° C.;

[0022] The external temperature parameter is used as the minimum temperature boundary, the internal temperature parameter is used as the maximum temperature boundary, and heat transfer analysis is performed under the conditions of the minimum temperature boundary and the maximum temperature boundary to obtain a first temperature field analysis result of the first geometric analysis model.

[0023] In an exemplary embodiment of the present disclosure, determining a dangerous stress area of the engine power transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation part of the engine power transmission device according to the dangerous stress area includes:

[0024] determining a maximum stress position of the engine power transmission device and a maximum stress distribution corresponding to the maximum stress position based on a first stress distribution of the engine power transmission device under a service condition;

[0025] determining a dangerous stress area of the engine power transmission device according to the maximum stress position, and obtaining target geometric model parameters of the dangerous stress area;

[0026] A second geometric analysis model of the characteristic simulation part of the engine power transmission device is determined based on the original target geometric model parameters of the first geometric analysis model and the target geometric model parameters of the dangerous stress area.

[0027] In an exemplary embodiment of the present disclosure, determining a characteristic simulation component of the engine force transmission device according to the first stress distribution gradient and the second stress distribution gradient includes:

[0028] determining whether a first gradient direction of the first stress distribution gradient and a second gradient direction of the second stress distribution gradient are consistent;

[0029] When it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent, using the second geometric analysis model as a characteristic simulation component of the engine power transmission device;

[0030] When it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are inconsistent, adjusting the relative positions of the test section and the clamping section in the second geometric analysis model, and using the second geometric analysis model after the position adjustment as a characteristic simulation part of the engine force transmission device;

[0031] Among them, the characteristic simulation part includes a test section, a transition section and a clamping section, and the test section is connected to the transition section and the clamping section along the application of the tensile load; the shape of the test section is similar to the shape of the dangerous stress area of the engine power transmission device; the shape of the transition section is a flat plate, and the shape of the clamping section is a threaded round rod.

[0032] According to one aspect of the present disclosure, a device for designing a characteristic simulation component of an engine force transmission device is provided, comprising:

[0033] a first stress distribution determining module, configured to construct a first geometric analysis model of the engine force transmission device and determine a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model;

[0034] a second geometric analysis model determination module, configured to determine a dangerous stress region of the engine power transmission device according to the first stress distribution, and determine a second geometric analysis model of a characteristic simulation component of the engine power transmission device according to the dangerous stress region;

[0035] a stress distribution gradient determination module, configured to determine a first stress distribution gradient in the dangerous stress area and a second stress distribution gradient in the second geometric analysis model;

[0036] The characteristic simulation component determination module is used to determine the characteristic simulation component of the engine power transmission device according to the first stress distribution gradient and the second stress distribution gradient.

[0037] According to one 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, the method for designing a characteristic simulation component of an engine power transmission device described in any one of the above is implemented.

[0038] According to one aspect of the present disclosure, there is provided an electronic device, including:

[0039] processor; and

[0040] a memory for storing executable instructions of the processor;

[0041] Wherein, the processor is configured to execute any one of the above-mentioned methods for designing a characteristic simulation component of an engine power transmission device by executing the executable instructions.

[0042] An embodiment of the present disclosure provides a design method for a characteristic simulation part of an engine force transmission device. On the one hand, a first geometric analysis model of the engine force transmission device is constructed, and based on the first geometric analysis model, a first stress distribution of the engine force transmission device under service conditions is determined; then, a dangerous stress area of the engine force transmission device is determined based on the first stress distribution, and a second geometric analysis model of the characteristic simulation part of the engine force transmission device is determined based on the dangerous stress area; then, a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of the second geometric analysis model are determined; finally, based on the first stress distribution gradient and the second stress distribution gradient, the characteristic simulation part of the engine force transmission device is determined, thereby realizing automatic generation of the characteristic simulation part of the engine force transmission device, thereby solving the problem that the characteristic simulation part of the engine force transmission device cannot be designed in the prior art; on the other hand, since the service strength of the engine force transmission device during service can be simulated based on the characteristic simulation part of the engine force transmission device, and the safety of the engine force transmission device during service can be analyzed based on the corresponding simulation results, the safety and reliability of the engine force transmission device during service are improved.

[0043] 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 disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are incorporated into 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 drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0045] Figure 1 A flow chart schematically illustrates a method for designing a characteristic simulation component of an engine power transmission device according to an exemplary embodiment of the present disclosure.

[0046] Figure 2 A diagram schematically illustrates an example scenario of maximum stress distribution at a maximum stress position according to an example embodiment of the present disclosure.

[0047] Figure 3 An example diagram of a normalized stress gradient distribution curve along the maximum stress drop direction according to an example embodiment of the present disclosure is schematically shown.

[0048] Figure 4 A geometric model of a feature simulation part designed according to the geometric shape of an example of a hazardous area according to an exemplary embodiment of the present disclosure is schematically shown.

[0049] Figure 5A diagram schematically illustrates a scenario example of a second stress distribution of a characteristic simulation component according to an example embodiment of the present disclosure.

[0050] Figure 6 A diagram schematically shows a comparison of normalized stress gradient curves of a characteristic simulation component and an actual dangerous part of an engine power transmission device according to an example embodiment of the present disclosure.

[0051] Figure 7 A structural example diagram schematically illustrates a device for designing a characteristic simulation component of an engine power transmission device according to an exemplary embodiment of the present disclosure.

[0052] Figure 8 An electronic device for implementing a method for designing a characteristic simulation component of an engine power transmission device according to an exemplary embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0053] 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 limited to the examples set forth herein; rather, these embodiments are provided so that the present disclosure will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. 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 that other methods, components, devices, steps, etc. may be employed. In other cases, well-known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0054] In addition, the accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures denote identical or similar parts, and thus repetitive descriptions thereof will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0055] Additive manufacturing (AM) materials, characterized by rapid point-by-point melting and layer-by-layer stacking, can be used to rapidly manufacture hot-end components for rocket engines. Furthermore, nickel-based superalloys, due to their excellent high-temperature performance, are also widely used in the manufacture of hot-end components for aviation and aerospace engines. Consequently, AM has become a key approach for the fabrication of nickel-based superalloy components.

[0056] The increasing demand for reusable rockets has placed new and higher demands on the strength of the force transmission devices of additively manufactured liquid rocket engines under extreme service conditions. Furthermore, due to the large size, complex structure, high cost, and the use of an integrated additive manufacturing process, component-level testing of the force transmission devices of additively manufactured liquid rocket engines requires significant manpower and resources, and it is difficult to obtain reliable strength analysis models.

[0057] In recent years, many researchers have designed various types of characteristic simulations for the hot end components of aircraft and space engines, studying their strength analysis and failure assessment under service conditions. However, for the force transmission devices of reusable liquid rocket engines, which are also subject to extreme load conditions, especially those manufactured using additive manufacturing processes, no researchers have conducted research on the design and study of characteristic simulations for these components. Therefore, it is particularly important to conduct research on the design and study of characteristic simulations for the additively manufactured force transmission devices of reusable liquid rocket engines under extreme service conditions.

[0058] Based on this, this exemplary embodiment first provides a design method for a characteristic simulation component of an engine power transmission device, which can be run on a terminal device, a server, a server cluster, or a cloud server; of course, those skilled in the art can also run the method disclosed in this disclosure on other platforms as needed, and this exemplary embodiment does not specifically limit this. Specifically, refer to Figure 1 As shown, the design method of the characteristic simulation part of the engine power transmission device may include the following steps:

[0059] Step S110: constructing a first geometric analysis model of the engine force transmission device, and determining a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model;

[0060] Step S120: determining a dangerous stress region of the engine power transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation component of the engine power transmission device according to the dangerous stress region;

[0061] Step S130: Determine a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of the second geometric analysis model;

[0062] Step S140: Determine a characteristic simulation component of the engine force transmission device according to the first stress distribution gradient and the second stress distribution gradient.

[0063] In the design method of the characteristic simulation part of the engine force transmission device described above, on the one hand, a first geometric analysis model of the engine force transmission device is constructed, and based on the first geometric analysis model, the first stress distribution of the engine force transmission device under the service condition is determined; then the dangerous stress area of the engine force transmission device is determined based on the first stress distribution, and the second geometric analysis model of the characteristic simulation part of the engine force transmission device is determined based on the dangerous stress area; then the first stress distribution gradient of the dangerous stress area and the second stress distribution gradient of the second geometric analysis model are determined; finally, based on the first stress distribution gradient and the second stress distribution gradient, the characteristic simulation part of the engine force transmission device is determined, thereby realizing the automatic generation of the characteristic simulation part of the engine force transmission device, thereby solving the problem that the characteristic simulation part of the engine force transmission device cannot be designed in the prior art; on the other hand, since the service strength of the engine force transmission device during service can be simulated based on the characteristic simulation part of the engine force transmission device, and the safety of the engine force transmission device during service can be analyzed based on the corresponding simulation results, the safety and reliability of the engine force transmission device during service are improved.

[0064] Hereinafter, the design method of the characteristic simulation part of the engine power transmission device described in the exemplary embodiment of the present disclosure will be explained and illustrated in detail with reference to the accompanying drawings.

[0065] First, the technical implementation principle of the exemplary embodiment of the present disclosure is explained and illustrated. Specifically, the design method of the characteristic simulation part of the engine force transmission device described in the exemplary embodiment of the present disclosure is to establish a finite element analysis model by obtaining the geometric model, thermodynamic performance parameters, and typical service loads of the liquid rocket engine force transmission device; then, a finite element analysis is performed on the force transmission device to obtain the stress distribution and determine the dangerous parts of the force transmission device; then, a geometric model of the characteristic simulation part of the dangerous part of the force transmission device is designed, and a finite element analysis is performed on the characteristic simulation part to obtain stress distribution data of the simulation part; finally, the consistency of the stress distribution gradient of the characteristic simulation part and the dangerous part of the force transmission device is evaluated to determine the characteristic simulation part of the engine force transmission device; at the same time, the clamping section of the characteristic simulation part obtained based on this method can perfectly fit the form of the standard fatigue test part and can be supplemented and compared with the material-level fatigue test data, providing a sufficient verification means for the subsequent improvement of the low-cycle fatigue performance of the force transmission device, thereby improving the safety and reliability of the engine force transmission device during service.

[0066] It should also be noted here that, during the actual service of the additively manufactured liquid rocket engine force transmission device, the base portion will be affected by the coupling of multiple loads, and therefore has a higher risk of failure. However, in existing research, no simulation part design and research has been conducted on the engine force transmission device of the additively manufactured liquid rocket. Therefore, the example embodiment of the present disclosure provides a design method for a characteristic simulation part of the engine force transmission device of the additively manufactured liquid rocket. In the process of actual application, according to the stress distribution of the dangerous parts of the engine force transmission device and the principle of geometric equivalence, a characteristic simulation part with a similar geometry to the base of the engine force transmission device is designed, and the stress distribution of the dangerous parts of the force transmission device is simulated, so that the simulation part can reflect the stress gradient of the dangerous parts of the force transmission device, providing an effective means for the strength assessment of the force transmission device during the service cycle, and helping to improve the safety and service reliability of the force transmission device components.

[0067] The following will Figure 1 The design method of the characteristic simulation part of the engine power transmission device shown in the figure is further explained and illustrated. Specifically:

[0068] In step S110, a first geometric analysis model of the engine power transmission device is constructed, and a first stress distribution of the engine power transmission device under a service condition is determined based on the first geometric analysis model.

[0069] In this example embodiment, first, a first geometric analysis model of the engine force transmission device is constructed. Specifically, this can be achieved by: obtaining a force transmission geometric model of the engine force transmission device of a liquid rocket based on additive manufacturing, and configuring first thermodynamic performance parameters for the force transmission geometric model; applying a first simulated service load under a simulated service condition to the force transmission geometric model, and constructing the first geometric analysis model of the engine force transmission device based on the force transmission geometric model, the first thermodynamic performance parameters, and the first simulated service load. The first thermodynamic performance parameters recorded herein may include, but are not limited to, the elastic modulus, Poisson's ratio, tensile strength, yield strength of the material used to prepare the engine force transmission device, and the thermal conductivity and thermal expansion coefficient of the engine force transmission device under the operating temperature field; the simulated service condition recorded herein is obtained by simulating the actual service condition of the liquid rocket engine force transmission device; and the first simulated service load recorded herein may include, but is not limited to, the temperature field load, gas pressure load, and pipeline support force load borne by the engine force transmission device during service. Among them, the tensile strength and yield strength recorded here can also be called Johnson-Cook constitutive parameters; the force transmission geometric model recorded here is the overall geometric model of the engine force transmission device; in the process of actual application, if it is necessary to construct a first geometric analysis model, the first thermodynamic performance parameter and the first simulated service load can be directly assigned to the overall geometric model of the engine force transmission device to obtain the first geometric analysis model; among them, the first geometric analysis model can also be called a finite element analysis model; the finite element is specifically reflected in three dimensions: temperature field load, gas pressure load and pipeline support force load.

[0070] Secondly, based on the first geometric analysis model, the first stress distribution of the engine force transmission device under the service condition is determined; specifically, this can be achieved in the following manner: heat transfer analysis is performed on the first geometric analysis model to obtain a first temperature field analysis result, and the first temperature field analysis result is imported into a static analysis predetermined field of the engine force transmission device; in the static analysis predetermined field, a first thermal-mechanical coupling calculation result is determined in combination with the first temperature field analysis result, the gas pressure load and the pipeline support force load borne by the engine force transmission device during service; and the first stress distribution of the engine force transmission device under the service condition is determined based on the first thermal-mechanical coupling calculation result.

[0071] In an example embodiment, heat transfer analysis is performed on the first geometric analysis model to obtain a first temperature field analysis result, which can be achieved as follows: temperature parameters are configured for the first geometric analysis model; wherein the external temperature parameter of the first geometric analysis model is 0°C, and the internal temperature parameter of the first geometric analysis model is 400°C; the external temperature parameter is used as the minimum temperature boundary, and the internal temperature parameter is used as the maximum temperature boundary, and heat transfer analysis is performed under the conditions of the minimum temperature boundary and the maximum temperature boundary to obtain a first temperature field analysis result of the first geometric analysis model.

[0072] The following will further explain and illustrate the specific process of determining the first stress distribution. Specifically, in actual application, in order to obtain the first stress distribution, it is necessary to perform a finite element analysis on the engine force transmission device under typical service conditions. At the same time, because the force transmission device is simultaneously subjected to three loads, namely temperature field load, gas pressure load, and pipeline support load, a heat transfer analysis of the force transmission device is first performed, and then the overall temperature field analysis result file of the force transmission device is imported into the predetermined field of the static analysis of the force transmission device to realize the first thermal-mechanical coupling calculation of the force transmission device. Then, based on the first thermal-mechanical coupling calculation result, the first stress distribution of the engine force transmission device under service conditions is determined.

[0073] The following will explain and illustrate the specific implementation process of heat transfer analysis. Specifically, the heat transfer analysis described here can also be understood as transient heat transfer analysis; wherein the transient heat transfer process refers to the heating or cooling process of a system; during the transient heat transfer process, the system's temperature, heat flux, thermal boundary conditions, and internal energy all change significantly over time; at the same time, according to the law of conservation of energy, the transient heat balance equation can be expressed (in matrix form) as follows (1):

[0074] [C]{dT / dt}+[K]{T}={Q}; Formula (1)

[0075] Where [K] is the heat transfer matrix, which includes thermal conductivity, convection, emissivity, and shape factor; that is, [K] is the matrix composed of thermal conductivity, convection, emissivity, and shape factor; {T} is the nodal temperature vector; [C] is the specific heat matrix, which takes into account the increase in internal energy of the system; {dT / dt} is the time derivative of the nodal temperature vector; and {Q} is the nodal heat flux vector, which includes heat generation.

[0076] Furthermore, in practical applications, since the solution of transient heat transfer problems requires the definition of initial conditions and boundary conditions; and the goal of transient heat transfer analysis is to predict the change of the temperature field over time, the initial conditions and boundary conditions play a key role. Under this premise, it is necessary to first define the initial conditions and boundary conditions; among them, the initial conditions define the initial distribution of the entire temperature field at time t = 0; among them, the initial distribution of the temperature field can be shown as the following formula (2):

[0077] T(x,0)=T0(x); Formula (2)

[0078] Among them, T(x,0) represents the temperature value at position x at time t=0, T0(x) is the initial condition, and the specific value is 0, which is the minimum temperature boundary recorded above. T(x,0) describes the temperature distribution of the object at the starting moment. Here, x can represent the outside of the first geometric analysis model.

[0079] Furthermore, the boundary conditions described above may adopt the first type of boundary conditions; wherein the first type of boundary conditions (constant temperature boundary) may be defined as the boundary temperature being known and kept constant. For example, the first type of boundary conditions may be expressed as the following formula (3):

[0080] T(x b ,t)=T b ; Formula (3)

[0081] Among them, T(x b ,t) represents the boundary position x b The temperature at b is the boundary temperature, the specific value is 400, which is the maximum temperature boundary mentioned above. Here x b Represents the interior of the first geometric analysis model. In practical applications, transient heat transfer is used to calculate a system's temperature field and other thermal parameters as they change over time. Simultaneously, when calculating the first temperature field analysis results for an engine's power transmission device, transient thermal analysis can be used to implement this analysis and use it as a thermal load for stress analysis. Furthermore, the load in transient thermal analysis varies over time.

[0082] The specific determination process of the first thermal-mechanical coupling calculation result will be explained and illustrated below. Specifically, in the process of practical application, thermal-mechanical coupling analysis can be used to describe the multi-physics coupling problem of the mutual influence of heat conduction and solid mechanics. Such problems are widely present in engineering practice, such as material structure analysis under high temperature conditions, stress changes during heat treatment, etc. This type of analysis simultaneously considers the thermal stress caused by the change of temperature field over time and the deformation of the material, which in turn affects the conduction of the temperature field. The stress and deformation of solids usually follow the linear elastic theory, and their constitutive relationship can be given by the stress-strain equation. Assuming that the material is linear elastic and affected by temperature, the basic stress-strain relationship can be shown as the following formula (4):

[0083]

[0084] Among them, σ ij is the stress tensor (Pa), C ijkl is the elastic stiffness matrix (Pa), ε kl is the strain tensor, is the thermal strain tensor, the thermal strain tensor Can be caused by temperature changes; among them, thermal strain It can be expressed as the following formula (5):

[0085]

[0086] Among them, α T is the thermal expansion coefficient of the material (1 / K), ΔT is the temperature change, δ kl is the Kronecker delta function.

[0087] Furthermore, since the key to thermal-mechanical coupling lies in the interaction between the thermal field and the stress field, and the change in the temperature field will cause the thermal expansion or contraction of the material, thereby generating stress and deformation; at the same time, the deformation of the structure will also change the thermal conductivity or heat dissipation conditions of the material; therefore, the stress balance equation of thermal stress can be set as the following formula (6):

[0088]

[0089] Where σ is the stress tensor, f is the body force, and u is the displacement vector. The change in temperature field T(x,t) is determined by the thermal expansion coefficient α TActing on the strain field, it causes stress to be generated; and high temperature can cause the material to soften, expand or contract, thereby changing the stress distribution of the structure; therefore, deformation and stress in turn affect the thermal conductivity of the material; for example, large deformation may change the geometric shape of the object, thereby affecting the path of heat flow or thermal conductivity [K]. Under this premise, the specific process of determining the results of the first thermal-mechanical coupling calculation is as follows: first, solve the temperature distribution T(x,t) through the heat conduction equation; second, use the temperature field T(x,t) to calculate the thermal strain Finally, the thermal strain is substituted into the stress equilibrium equation to solve the stress and displacement fields, thereby obtaining the first thermal-mechanical coupling calculation result. Then, based on the first thermal-mechanical coupling calculation result, the first stress distribution of the engine power transmission device under service conditions is determined.

[0090] In step S120, a dangerous stress area of the engine power transmission device is determined according to the first stress distribution, and a second geometric analysis model of a characteristic simulation part of the engine power transmission device is determined according to the dangerous stress area.

[0091] Specifically, the specific process of determining the second geometric analysis model can be achieved as follows: based on the first stress distribution of the engine power transmission device under service conditions, determining the maximum stress position of the engine power transmission device and the maximum stress distribution corresponding to the maximum stress position; determining the dangerous stress area of the engine power transmission device based on the maximum stress position, and obtaining the target geometric model parameters of the dangerous stress area; based on the original target geometric model parameters of the first geometric analysis model and the target geometric model parameters of the dangerous stress area, determining the second geometric analysis model of the characteristic simulation part of the engine power transmission device. The dangerous stress area recorded here refers to the location corresponding to the maximum stress node in the first stress distribution of the finite element analysis model of the engine power transmission device (i.e., the first geometric analysis model).

[0092] The following will explain and illustrate the specific determination process of the second geometric analysis model. Specifically, in the actual application process, it is necessary to first determine the maximum stress position and the maximum stress distribution corresponding to the maximum stress position; the stress distribution at the maximum stress position can refer to Figure 2 As shown; at the same time, the normalized stress gradient distribution curve along the maximum stress drop direction can be referred to Figure 3As shown; secondly, after obtaining the stress distribution at the maximum stress position, the maximum stress position of the force transmission device can be selected as the dangerous position (that is, the dangerous stress area) of the geometric model of the force transmission device; then, the target geometric model parameters of the dangerous position (that is, the dangerous stress area) of the force transmission device are obtained, and based on the principle of geometric similarity, the geometric model of the force transmission device simulation part (that is, the second geometric analysis model) is established; among them, the geometric model of the characteristic simulation part designed according to the geometric shape of the dangerous position example (that is, the second geometric analysis model) can be referred to Figure 4 As shown; and, the geometric dimensions of the dangerous stress area based on the engine power transmission device are proportionally scaled as the test section (A); the transition section (B) is a mm thick; the clamping section (C) is b mm long and c mm in diameter; both ends of the test section (A) along the direction of applied load are connected to the clamping section (C) through the transition section (B).

[0093] In step S130 , a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of the second geometric analysis model are determined.

[0094] Specifically, the specific process of determining the first stress distribution gradient can be achieved in the following way: determine the first stress distribution gradient of the dangerous stress area based on the maximum stress distribution of the stress area in the literature; at the same time, the first stress distribution gradient recorded here refers to the stress gradient starting from the maximum stress node in the maximum stress distribution of the dangerous stress area of the engine transmission device, along the stress drop path to the boundary of the first geometric analysis model; further, the specific process of determining the second stress distribution gradient can be achieved in the following way: first, determine the second stress distribution of the second geometric analysis model; second, determine the second stress distribution gradient based on the second stress distribution. Moreover, in the process of determining the second stress distribution, it is first necessary to assign the same thermodynamic performance parameters as the first geometric analysis model to the second geometric analysis model, and secondly, apply a tensile load to the second geometric analysis model to obtain the following. Figure 5 The finite element stress distribution cloud diagram (i.e., the second stress distribution) of the characteristic simulation part of the engine power transmission device shown is similar to the specific determination process of the first stress distribution, and will not be further elaborated here.

[0095] In step S140, a characteristic simulation component of the engine power transmission device is determined according to the first stress distribution gradient and the second stress distribution gradient.

[0096] Specifically, the specific determination process of the characteristic simulation part can be achieved in the following way: determine whether the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent; when it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent, use the second geometric analysis model as the characteristic simulation part of the engine power transmission device; when it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are inconsistent, adjust the relative positions of the test section and the clamping section in the second geometric analysis model, and use the second geometric analysis model after position adjustment as the characteristic simulation part of the engine power transmission device; wherein, the characteristic simulation part includes a test section, a transition section and a clamping section, and the test section is connected to the transition section and the clamping section along the application of the tensile load; the shape of the test section is similar to the shape of the dangerous stress area of the engine power transmission device; the shape of the transition section is a flat plate, and the shape of the clamping section is a threaded round rod.

[0097] The following further explains and illustrates the specific process for determining the characteristic simulation component of an engine's force transmission device. Specifically, during this process, the consistency of the stress distribution gradient between the characteristic simulation component and the critical area of the force transmission device must be evaluated. By adjusting the relative position of the test section and the clamping section of the force transmission device simulation component, the stress distribution in the test section of the force transmission device simulation component is aligned with the stress distribution in the critical area of the force transmission device's geometric model. That is, in the process of actual application, if it is necessary to complete the design of the characteristic simulation part of the engine force transmission device, the following design indicators need to be followed: ensure that the maximum stress node in the stress distribution of the test section of the characteristic simulation part is consistent with the dangerous point of the dangerous part (dangerous stress area) of the engine force transmission device, and also ensure that the stress distribution gradient of the test section in the characteristic simulation part is consistent with the stress gradient of the engine force transmission device along the stress drop direction; further, the specific optimization process of the second geometric analysis model of the characteristic simulation part is: by continuously adjusting the relative position of the test section and the clamping section of the characteristic simulation part of the engine force transmission device, the stress gradient of the root of the test section of the characteristic simulation part along the loading direction perpendicular to the tensile load is consistent with the stress gradient of the dangerous stress area of the engine force transmission device (that is, the first gradient direction and the second gradient direction need to be consistent).

[0098] It should be noted that the Figure 2 and Figure 5 It can be seen that the first stress distribution of the actual engine force transmission device is consistent with the second stress distribution of the characteristic simulation part, with the maximum stress value differing by 0.15MPa and the error remaining within 0.02%. Figure 6A comparison diagram of the normalized stress gradient curves of the dangerous parts of the characteristic simulation part and the actual engine power transmission device is shown. It can be seen that the stress gradient distribution of the dangerous parts of the simulation part and the actual power transmission device is basically consistent. Therefore, the simulation part designed in the present invention is well representative of the real power transmission device.

[0099] The following are embodiments of the apparatus disclosed herein, which can be used to implement the method embodiments disclosed herein. For details not disclosed in the apparatus embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0100] The present disclosure also provides a design device for a characteristic simulation part of an engine power transmission device. Figure 7 As shown, the design device for the characteristic simulation component of the engine power transmission device may include a first stress distribution determination module 710, a second geometric analysis model determination module 720, a stress distribution gradient determination module 730, and a characteristic simulation component determination module 740.

[0101] A first stress distribution determining module 710 may be used to construct a first geometric analysis model of the engine force transmission device and determine a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model;

[0102] The second geometric analysis model determination module 720 may be configured to determine a dangerous stress region of the engine power transmission device according to the first stress distribution, and determine a second geometric analysis model of a characteristic simulation component of the engine power transmission device according to the dangerous stress region;

[0103] A stress distribution gradient determination module 730 may be used to determine a first stress distribution gradient of the dangerous stress region and a second stress distribution gradient of the second geometric analysis model;

[0104] The characteristic simulation component determination module 740 can be used to determine the characteristic simulation component of the engine power transmission device according to the first stress distribution gradient and the second stress distribution gradient.

[0105] In an exemplary embodiment of the present disclosure, a first geometric analysis model of an engine force transmission device is constructed, including: obtaining a force transmission geometric model of an engine force transmission device of a liquid rocket based on additive manufacturing, and configuring first thermodynamic performance parameters for the force transmission geometric model; applying a first simulated service load under a simulated service condition to the force transmission geometric model, and constructing a first geometric analysis model of the engine force transmission device based on the force transmission geometric model, the first thermodynamic performance parameters and the first simulated service load.

[0106] In an exemplary embodiment of the present disclosure, the first thermodynamic performance parameter includes the elastic modulus, Poisson's ratio, tensile strength, yield strength of the material used to prepare the engine power transmission device and at least one of the thermal conductivity and thermal expansion coefficient of the engine power transmission device under the working temperature field; the simulated service condition is obtained by simulating the actual service condition of the engine power transmission device of the liquid rocket, and the first simulated service load includes at least one of the temperature field load, gas pressure load and pipeline support force load that the engine power transmission device is subjected to during service.

[0107] In an exemplary embodiment of the present disclosure, based on the first geometric analysis model, the first stress distribution of the engine power transmission device under the service condition is determined, including: performing a heat transfer analysis on the first geometric analysis model to obtain a first temperature field analysis result, and importing the first temperature field analysis result into a static analysis predetermined field of the engine power transmission device; in the static analysis predetermined field, combining the first temperature field analysis result, the gas pressure load and the pipeline support force load borne by the engine power transmission device during service, to determine a first thermal-mechanical coupling calculation result; and determining the first stress distribution of the engine power transmission device under the service condition based on the first thermal-mechanical coupling calculation result.

[0108] In an exemplary embodiment of the present disclosure, a heat transfer analysis is performed on the first geometric analysis model to obtain a first temperature field analysis result, including: configuring temperature parameters for the first geometric analysis model; wherein the external temperature parameter of the first geometric analysis model is 0°C, and the internal temperature parameter of the first geometric analysis model is 400°C; taking the external temperature parameter as the minimum temperature boundary and the internal temperature parameter as the maximum temperature boundary, and performing a heat transfer analysis under the conditions of the minimum temperature boundary and the maximum temperature boundary to obtain a first temperature field analysis result of the first geometric analysis model.

[0109] In an exemplary embodiment of the present disclosure, the dangerous stress area of the engine power transmission device is determined according to the first stress distribution, and the second geometric analysis model of the characteristic simulation part of the engine power transmission device is determined according to the dangerous stress area, including: determining the maximum stress position of the engine power transmission device and the maximum stress distribution corresponding to the maximum stress position according to the first stress distribution of the engine power transmission device under the service condition; determining the dangerous stress area of the engine power transmission device according to the maximum stress position, and obtaining the target geometric model parameters of the dangerous stress area; determining the second geometric analysis model of the characteristic simulation part of the engine power transmission device according to the original target geometric model parameters of the first geometric analysis model and the target geometric model parameters of the dangerous stress area.

[0110] In an exemplary embodiment of the present disclosure, the characteristic simulation part of the engine force transmission device is determined according to the first stress distribution gradient and the second stress distribution gradient, including: determining whether the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent; when it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent, the second geometric analysis model is used as the characteristic simulation part of the engine force transmission device; when it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are inconsistent, the relative positions of the test section and the clamping section in the second geometric analysis model are adjusted, and the second geometric analysis model after position adjustment is used as the characteristic simulation part of the engine force transmission device; wherein, the characteristic simulation part includes a test section, a transition section and a clamping section, and the test section is connected to the transition section and the clamping section along the application of the tensile load; the shape of the test section is similar to the shape of the dangerous stress area of the engine force transmission device; the shape of the transition section is a flat plate, and the shape of the supporting section is a threaded round rod.

[0111] The specific details of each module in the design device of the characteristic simulation part of the above-mentioned engine power transmission device have been described in detail in the design method of the characteristic simulation part of the corresponding engine power transmission device, so they will not be repeated here.

[0112] It should be noted that although several modules or units of the device for action execution are mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be concretized in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0113] Furthermore, although the steps of the method of the present disclosure are described in a particular order in the accompanying drawings, this does not require or imply that the steps must be performed in this particular order, or that all steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0114] In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided. Those skilled in the art will appreciate that various aspects of the present disclosure can be implemented as a system, method, or program product. Therefore, various aspects of the present disclosure can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to herein as a circuit, module, or system.

[0115] Refer to the following Figure 8 800 according to this embodiment of the present disclosure will be described. Figure 8 The electronic device 800 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0116] like Figure 8 As shown, electronic device 800 is implemented as a general-purpose computing device. Components of electronic device 800 may include, but are not limited to, the aforementioned at least one processing unit 810, the aforementioned at least one storage unit 820, a bus 830 connecting various system components (including storage unit 820 and processing unit 810), and a display unit 840.

[0117] The storage unit stores program codes, which can be executed by the processing unit 810, so that the processing unit 810 performs the steps described in the "Exemplary Method" section of the present disclosure according to various exemplary embodiments. For example, the processing unit 810 can perform the following steps: Figure 1 Step S110 shown in: constructing a first geometric analysis model of the engine power transmission device, and determining the first stress distribution of the engine power transmission device under the service condition based on the first geometric analysis model; step S120: determining the dangerous stress area of the engine power transmission device based on the first stress distribution, and determining the second geometric analysis model of the characteristic simulation part of the engine power transmission device based on the dangerous stress area; step S130: determining the first stress distribution gradient of the dangerous stress area and the second stress distribution gradient of the second geometric analysis model; step S140: determining the characteristic simulation part of the engine power transmission device based on the first stress distribution gradient and the second stress distribution gradient.

[0118] The storage unit 820 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 8201 and / or a cache memory unit 8202 , and may further include a read-only memory unit (ROM) 8203 .

[0119] The storage unit 820 may also include a program / utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 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.

[0120] Bus 830 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0121] The electronic device 800 can also communicate with one or more external devices 900 (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 800, and / or any device that enables the electronic device 800 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). Such communication can occur via an input / output (I / O) interface 850. Furthermore, the electronic device 800 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 860. As shown, the network adapter 860 communicates with other modules of the electronic device 800 via a bus 830. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 800, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0122] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments 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 a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0123] In exemplary embodiments of the present disclosure, a computer-readable storage medium is also provided, on which is stored a program product capable of implementing the aforementioned methods of this specification. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product comprising program code. When the program product is executed on a terminal device, the program code is configured to cause the terminal device to execute the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of the present disclosure.

[0124] According to an embodiment of the present disclosure, a program product for implementing the above-mentioned method can be a portable compact disc 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 conjunction with an instruction execution system, apparatus, or device.

[0125] The program product may be implemented in 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 component, or any combination thereof. More specific examples (a 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 thereof.

[0126] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0127] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0128] The 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++, and the like, as well as 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 stand-alone 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 via 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., via the Internet using an Internet service provider).

[0129] Furthermore, the figures above are merely illustrative of the processes included in the methods according to exemplary embodiments of the present disclosure and are not intended to be limiting. It is readily understood that the processes illustrated in the figures above do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0130] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the present disclosure and include common knowledge or customary techniques in the art not invented herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

Claims

1. A method for designing a characteristic simulation component of an engine power transmission device, characterized in that: include: Constructing a first geometric analysis model of the engine force transmission device, and determining a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model; determining a dangerous stress region of the engine power transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation part of the engine power transmission device according to the dangerous stress region; determining a first stress distribution gradient of the dangerous stress area and a second stress distribution gradient of the second geometric analysis model; A characteristic simulation component of the engine force transmission device is determined according to the first stress distribution gradient and the second stress distribution gradient.

2. The method for designing a characteristic simulation part according to claim 1, wherein: Construct the first geometric analysis model of the engine power transmission device, including: Obtaining a force transmission geometry model of an engine force transmission device of an additively manufactured liquid rocket, and configuring a first thermodynamic performance parameter for the force transmission geometry model; A first simulated service load under a simulated service condition is applied to the force transmission geometric model, and a first geometric analysis model of the engine force transmission device is constructed based on the force transmission geometric model, the first thermodynamic performance parameter and the first simulated service load.

3. The method for designing a characteristic simulation part according to claim 2, wherein: The first thermodynamic performance parameter includes at least one of the elastic modulus, Poisson's ratio, tensile strength, yield strength of the material used to prepare the engine power transmission device, and the thermal conductivity and thermal expansion coefficient of the engine power transmission device under the operating temperature field; The simulated service condition is obtained by simulating the actual service condition of the engine power transmission device of the liquid rocket, and the first simulated service load includes at least one of the temperature field load, gas pressure load and pipeline support force load that the engine power transmission device is subjected to during the service process.

4. The method for designing a characteristic simulation part according to claim 1, wherein: Determining a first stress distribution of the engine force transmission device under a service condition according to the first geometric analysis model includes: Performing heat transfer analysis on the first geometric analysis model to obtain a first temperature field analysis result, and importing the first temperature field analysis result into a predetermined field for static analysis of the engine power transmission device; In the predetermined static analysis field, a first thermal-mechanical coupling calculation result is determined by combining the first temperature field analysis result, the gas pressure load and the pipeline support force load borne by the engine power transmission device during service; A first stress distribution of the engine force transmission device under a service condition is determined based on the first thermal-mechanical coupling calculation result.

5. The method for designing a characteristic simulation part according to claim 4, characterized in that: Performing heat transfer analysis on the first geometric analysis model to obtain a first temperature field analysis result includes: configuring temperature parameters for the first geometric analysis model; wherein the external temperature parameter of the first geometric analysis model is 0° C., and the internal temperature parameter of the first geometric analysis model is 400° C.; The external temperature parameter is used as the minimum temperature boundary, the internal temperature parameter is used as the maximum temperature boundary, and heat transfer analysis is performed under the conditions of the minimum temperature boundary and the maximum temperature boundary to obtain a first temperature field analysis result of the first geometric analysis model.

6. The method for designing a characteristic simulation part according to claim 1, wherein: Determining a dangerous stress area of the engine power transmission device according to the first stress distribution, and determining a second geometric analysis model of a characteristic simulation part of the engine power transmission device according to the dangerous stress area, including: determining a maximum stress position of the engine power transmission device and a maximum stress distribution corresponding to the maximum stress position based on a first stress distribution of the engine power transmission device under a service condition; determining a dangerous stress area of the engine power transmission device according to the maximum stress position, and obtaining target geometric model parameters of the dangerous stress area; A second geometric analysis model of the characteristic simulation part of the engine power transmission device is determined based on the original target geometric model parameters of the first geometric analysis model and the target geometric model parameters of the dangerous stress area.

7. The method for designing a characteristic simulation part according to claim 1, wherein: Determining a characteristic simulation component of the engine force transmission device according to the first stress distribution gradient and the second stress distribution gradient includes: determining whether a first gradient direction of the first stress distribution gradient and a second gradient direction of the second stress distribution gradient are consistent; When it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are consistent, using the second geometric analysis model as a characteristic simulation component of the engine power transmission device; When it is determined that the first gradient direction of the first stress distribution gradient and the second gradient direction of the second stress distribution gradient are inconsistent, adjusting the relative positions of the test section and the clamping section in the second geometric analysis model, and using the second geometric analysis model after the position adjustment as a characteristic simulation part of the engine force transmission device; Among them, the characteristic simulation part includes a test section, a transition section and a clamping section, and the test section is connected to the transition section and the clamping section along the application of tensile load; the shape of the test section is similar to the shape of the dangerous stress area of the engine power transmission device; the shape of the transition section is a flat plate, and the shape of the clamping section is a threaded round rod.

8. A design device for a characteristic simulation part of an engine power transmission device, characterized in that: include: a first stress distribution determining module, configured to construct a first geometric analysis model of the engine force transmission device and determine a first stress distribution of the engine force transmission device under a service condition based on the first geometric analysis model; a second geometric analysis model determination module, configured to determine a dangerous stress region of the engine power transmission device according to the first stress distribution, and determine a second geometric analysis model of a characteristic simulation component of the engine power transmission device according to the dangerous stress region; a stress distribution gradient determination module, configured to determine a first stress distribution gradient in the dangerous stress area and a second stress distribution gradient in the second geometric analysis model; The characteristic simulation component determination module is used to determine the characteristic simulation component of the engine power transmission device according to the first stress distribution gradient and the second stress distribution gradient.

9. 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 for designing a characteristic simulation part of an engine power transmission device according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: include: processor; as well as a memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the method for designing a characteristic simulation component of an engine power transmission device according to any one of claims 1 to 7 by executing the executable instructions.

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