A method and system for simulating non-uniform load force based on numerical calculation

Abstract

The present invention discloses a non-uniform load force simulation processing method and system based on numerical calculation, which belongs to the field of industrial simulation technology. Existing simulation technology cannot accurately simulate non-uniform loads under complex geometric features, resulting in large simulation deviations. A non-uniform load force simulation processing method based on numerical calculation of the present invention reconstructs the surface information of the simulation object by creating a geometric feature recognition model, a surface information judgment model, a load surface construction model, a non-uniform force simulation model and a load analysis model, thereby obtaining a load application surface that meets the simulation requirements, thereby effectively solving the problem of non-uniform loads under complex geometric features; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, improve the reliability and efficiency of numerical calculations, reduce simulation deviations, and thus effectively improve the quality of design and manufacturing.

Description

Technical Field

[0001] The invention relates to a non-uniformly distributed load force simulation processing method and system based on numerical calculation, belonging to the technical field of industrial simulation. Background Art

[0002] With the continuous advancement of industrial technology, complex geometric structures and non-uniform loads have become increasingly common in mechanical design and manufacturing. In many industrial scenarios, mechanical parts such as shafts, bearings, bearing seats, etc. usually involve complex geometric features such as cylindrical surfaces or shell edges. Traditional numerical calculation methods often use the assumption of uniform loads when dealing with such feature areas.

[0003] However, in actual working conditions, the stress conditions in these areas are usually not uniform, and the load distribution will show various non-uniform characteristics due to different geometric features. For example, the load on the cylindrical surface may show a sinusoidal change due to the particularity of the structure, or produce additional local stress concentration due to asymmetry. If these non-uniform loads are not accurately handled, they will lead to problems such as stress concentration and fatigue damage, which will ultimately affect the performance and life of mechanical components.

[0004] Most of the numerical calculation software in current industrial applications, such as common finite element analysis tools, adopt the uniform load processing method. This method assumes that the load is evenly distributed on the entire load-bearing surface, which is suitable for some simple structures and working conditions. However, for complex geometric features such as cylindrical surfaces and shell edges, the assumption of uniform load does not conform to the actual situation. In these areas, the load often presents a non-uniform distribution due to the influence of geometry, material properties or external conditions. For example, the force on bearings or rotating parts often changes significantly with different positions, and this non-uniform load characteristic cannot be accurately reflected by the uniform load assumption. This results in the inability of existing simulation solutions and software tools to accurately simulate the actual force conditions when dealing with such complex geometric features, thereby affecting the accuracy and reliability of mechanical analysis.

[0005] Furthermore, most of the existing numerical calculation industrial simulation tools focus on the realization of general mechanical analysis functions, and lack models or functions specifically for non-uniform load processing. This deficiency forces users to use simplified assumptions or tedious manual adjustments to approximate the effects of non-uniform loads when facing complex working conditions, which not only increases the difficulty of analysis, but also may lead to deviations in results, thus affecting the quality of design and manufacturing.

[0006] The information disclosed in this Background Art is only for understanding the background of the inventive concept and therefore it may include information that does not constitute the prior art. Summary of the invention

[0007] In response to the above problem or one of the above problems, an object of the present invention is to provide a non-uniform load force simulation processing method based on numerical calculation. By creating a geometric feature recognition model, a surface information judgment model, a load surface construction model, a non-uniform force simulation model and a load analysis model, the surface information of the simulation object is reconstructed to obtain a load application surface that meets the simulation requirements, thereby effectively solving the problem of non-standard load application surfaces of many shaft and bearing components; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculation.

[0008] In response to the above problem or one of the above problems, the second purpose of the present invention is to provide a non-uniform load force simulation processing system based on numerical calculation. By setting a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module, the surface information of the simulation object is reconstructed to obtain a load application surface that meets the simulation requirements, thereby effectively solving the problem of non-standard load application surfaces of many shaft and bearing components; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculation; and it can effectively reduce the difficulty of analyzing the non-uniform load, reduce simulation deviations, effectively solve the problem of non-uniform loads under complex geometric features, and thus effectively improve the quality of design and manufacturing.

[0009] To achieve one of the above purposes, the first technical solution of the present invention is:

[0010] A non-uniform load force simulation processing method based on numerical calculation includes the following contents:

[0011] Through the geometric feature recognition model created in advance, the object to be simulated is processed to extract the geometric feature information of the surface of the object to be simulated;

[0012] Using the surface information judgment model created in advance, the geometric feature information is processed to obtain the surface simulation information of the object to be simulated;

[0013] The load surface construction model created in advance is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated;

[0014] Use the non-uniform force simulation model created in advance to fit the non-uniform load and obtain the digital simulation load;

[0015] Based on the load analysis model created in advance, the digital simulation load is applied to the load application surface to obtain the non-uniform load simulation result, and the non-uniform load force simulation processing based on numerical calculation is completed.

[0016] After continuous exploration and experiments, the present invention reconstructs the surface information of the simulation object by creating a geometric feature recognition model, a surface information judgment model, a load surface construction model, a non-uniform force simulation model and a load analysis model, thereby obtaining a load application surface that meets the simulation requirements. This can effectively solve the problem of many shaft and bearing components having non-standard load application surfaces; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculations.

[0017] Furthermore, the present invention can accurately simulate the actual stress conditions of various geometric objects through processing through computational models without tedious manual adjustments or approximate simulations, thereby effectively reducing the difficulty of analyzing non-uniform loads, reducing simulation deviations, and effectively solving the problem of non-uniform loads under complex geometric features, thereby effectively improving the quality of design and manufacturing.

[0018] Furthermore, by applying the non-uniform load force simulation processing method of the present invention, a non-ideal cylindrical surface can be fitted into an ideal cylindrical surface. At the same time, the processing flow can be simplified and the calculation efficiency can be improved without sacrificing the calculation accuracy. Therefore, the present invention not only solves the problem of applying non-uniform loads, but also enhances the adaptability of the simulation system to actual industrial applications, allowing users to more efficiently deal with various complex geometric features and processing errors, thereby effectively avoiding stress concentration, fatigue damage and other problems, and improving the performance and life of mechanical components.

[0019] As the preferred technical measures:

[0020] The method of processing the object to be simulated by using the geometric feature recognition model created in advance and extracting the geometric feature information of the surface of the object to be simulated is as follows:

[0021] Select a surface of the object to be simulated and extract the face identification of the surface for identification in subsequent operations;

[0022] After obtaining the face identification of a certain surface, extracting the edge information and corresponding node data inside the surface corresponding to the face identification;

[0023] When the surface corresponding to the face identifier is a complete cylindrical surface, the edge information includes circular edges on both sides;

[0024] When the surface corresponding to the face identifier is a subdivided cylindrical surface, the edge information includes the circular edges on both sides and the subdivided edges formed by the subdivided surface;

[0025] The surface identification, edge information and node data are coupled to obtain the geometric feature information of the surface of the object to be simulated.

[0026] As the preferred technical measures:

[0027] The method of using the surface information judgment model created in advance to process the geometric feature information to obtain the surface simulation information of the object to be simulated is as follows:

[0028] Obtaining geometric feature information, including face identification, edge information, and node data;

[0029] Check whether the edge information includes the circle center feature to determine whether the edge information is an arc edge and count the number of arc edges;

[0030] When the edge information includes the circle center feature, the edge information is an arc edge;

[0031] If there are two arc edges, it indicates that the surface of the object to be simulated is a continuous closed surface with two standard arcs, indicating that the fitting operation can be performed; at this time, the two arc edges and the center features are used as the surface simulation information of the object to be simulated;

[0032] When the edge information does not include the center information, or the number of arc edges is less than or more than two arc edges, it means that an error has occurred in the selected surface or the two side edges of the selected surface are not arc edges. In this case, it is necessary to reselect the surface of the object to be simulated.

[0033] As the preferred technical measures:

[0034] The method of using the previously created load surface construction model to reconstruct the surface simulation information and obtain the load application surface of the object to be simulated is as follows:

[0035] Obtain two arc edges and circle center features in the surface simulation information;

[0036] According to the features of the two arc edges and the center of the circle, the midpoint coordinates and radius information of the two arc edges are calculated;

[0037] Based on the midpoint coordinates and radius information of the two arc edges, the arc distance between the midpoints of the two arc edges is calculated;

[0038] The arc distance is taken as the height of the ideal cylindrical surface, that is, the size of the ideal cylinder in the z-axis direction;

[0039] Based on the arc distance and combined with the radius information of the arc, an ideal cylindrical surface is constructed and used as the load application surface of the object to be simulated.

[0040] As the preferred technical measures:

[0041] Using the previously created non-uniform force simulation model, the method of fitting the non-uniform load to obtain the digital simulation load is as follows:

[0042] Get the non-uniformly distributed load and set the load coordinate system;

[0043] The load coordinate system sets the axial direction of the cylindrical surface as the z-axis, and sets the x-axis and y-axis on the plane where the cylindrical surface is located;

[0044] Based on the load coordinate system, obtain the load angle between the force direction of the node and the x-axis;

[0045] According to the load angle and the sinusoidal change formula, a sinusoidal change load calculation function is constructed;

[0046] Based on the sinusoidal load calculation function, a digital simulation load is obtained.

[0047] As the preferred technical measures:

[0048] Based on the load analysis model created in advance, the digital simulation load is applied to the load application surface to obtain the non-uniform load simulation result as follows:

[0049] The digital simulation load is a sinusoidally varying load, which is transmitted to all nodes of the object to be simulated along the circumference of the load application surface or the cross section of the load application surface to obtain the node force;

[0050] The load application surface is a cylindrical surface. According to the bilateral symmetry of the cylindrical surface, the node force is decomposed to obtain the horizontal component in the x-axis direction and the longitudinal component in the y-axis direction. According to the principle of force balance, the horizontal component in the x-axis direction cancels out to zero, leaving only the longitudinal component in the y-axis direction.

[0051] The longitudinal forces of all nodes are accumulated and superimposed to obtain the total load force;

[0052] Based on the total load force and the global stiffness matrix of the cylindrical surface, the simulation results of non-uniform load are obtained.

[0053] As the preferred technical measures:

[0054] Based on the total load force and the stiffness matrix of the cylindrical surface, the method to obtain the simulation results of non-uniform load is as follows:

[0055] Based on the total load force and the global stiffness matrix of the cylindrical surface, a linear equation system is constructed and solved using a numerical method to obtain the displacement value of each node;

[0056] After obtaining the displacement value of the node, the strain vector inside the node is calculated according to the strain-displacement matrix;

[0057] Next, based on the material elastic matrix and strain vector, the relationship between strain and stress is constructed, and the stress information of the node is calculated;

[0058] According to the stress information of the nodes, combined with the geometric characteristics and local stress distribution, the force analysis of the simulation object is carried out to obtain the simulation results of non-uniform load.

[0059] As the preferred technical measures:

[0060] According to the stress information of the nodes, combined with the geometric characteristics and local stress distribution, the method for force analysis of the simulation object is as follows:

[0061] Based on the stress information of the nodes, analyze the stress distribution of each node and screen out the areas of stress concentration;

[0062] Based on the stress information of the nodes, calculate the deformation of the object to be simulated under the load.

[0063] According to the deformation amount, the deformation of the object to be simulated under the action of non-uniform load is determined, and whether the object to be simulated will have excessive deformation or failure risk in actual use is judged to obtain the deformation analysis result;

[0064] The stress distribution, deformation and deformation analysis results are summarized to generate a mechanical properties report, which is used to evaluate the feasibility and safety of the design scheme of the object to be simulated.

[0065] To achieve one of the above purposes, the second technical solution of the present invention is:

[0066] The non-uniform load force simulation processing system based on numerical calculation includes a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module:

[0067] A geometric feature recognition module is used to process the object to be simulated and extract geometric feature information of the surface of the object to be simulated;

[0068] The surface information judgment module is used to process the geometric feature information to obtain the surface simulation information of the object to be simulated;

[0069] A load surface construction module is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated;

[0070] The non-uniform force simulation module is used to fit the non-uniform load and obtain the digital simulation load;

[0071] The load analysis module is used to apply the digital simulation load to the load application surface to obtain the non-uniform load simulation result.

[0072] After continuous exploration and experiments, the present invention reconstructs the surface information of the simulation object by setting a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module, so as to obtain a load application surface that meets the simulation requirements. Therefore, the problem of non-standard load application surfaces of many shaft and bearing components can be effectively solved; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculations; and the difficulty of analyzing the non-uniform load can be effectively reduced, the simulation deviation can be reduced, and the problem of non-uniform load under complex geometric features can be effectively solved, thereby effectively improving the quality of design and manufacturing.

[0073] Furthermore, the non-uniform load force simulation processing system of the present application may be software or a mobile app or a browser or a web page or a cloud computing platform.

[0074] As the preferred technical measures:

[0075] The load analysis module includes a stress analysis unit and a strain analysis unit;

[0076] Stress analysis unit, used to calculate the stress distribution of each node and obtain the area where stress concentration occurs;

[0077] The strain analysis unit is used to calculate the deformation and strain distribution under the action of non-uniform load, and to obtain the deformation behavior of the object to be simulated under the non-uniform load.

[0078] Compared with the prior art solutions, the present invention has the following beneficial effects:

[0079] After continuous exploration and experiments, the present invention reconstructs the surface information of the simulation object by creating a geometric feature recognition model, a surface information judgment model, a load surface construction model, a non-uniform force simulation model and a load analysis model, thereby obtaining a load application surface that meets the simulation requirements. This can effectively solve the problem of many shaft and bearing components having non-standard load application surfaces; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculations.

[0080] Furthermore, the present invention uses a computational model for processing, eliminating the need for tedious manual adjustments or approximate simulations, thereby effectively reducing the difficulty of analyzing non-uniform loads, reducing simulation deviations, and effectively solving the problem of non-uniform loads under complex geometric features, thereby effectively improving the quality of design and manufacturing.

[0081] At the same time, after continuous exploration and experimentation, the present invention reconstructs the surface information of the simulation object by setting a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module, so as to obtain a load application surface that meets the simulation requirements. Therefore, the problem of many shaft and bearing components having non-standard load application surfaces can be effectively solved; at the same time, the non-uniform load is fitted to achieve accurate application and analysis of the non-uniform load, thereby improving the reliability and efficiency of numerical calculations; and the difficulty of analyzing the non-uniform load can be effectively reduced, the simulation deviation can be reduced, and the problem of non-uniform load under complex geometric features can be effectively solved, thereby effectively improving the quality of design and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 A schematic diagram of a flow chart of a non-uniform load force simulation processing method of the present invention;

[0083] Figure 2 A distribution principle diagram of a sinusoidally varying non-uniformly distributed load of the present invention;

[0084] Figure 3 A distribution effect diagram of the non-uniformly distributed load of the present invention;

[0085] Figure 4 A process diagram of fitting an ideal cylindrical surface according to the present invention;

[0086] Figure 5 It is an oblique view of the inner wall surface of a cast flange-type square bearing seat;

[0087] Figure 6 It is a side view of the inner wall of a cast flange-type square bearing seat;

[0088] Figure 7 It is a structural schematic diagram of the suspended bearing seat of the present invention. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0090] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. Those skilled in the art can fully understand the present invention without the description of these details.

[0091] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0092] like Figure 1 As shown, the first specific embodiment of the non-uniform load force simulation processing method based on numerical calculation of the present invention is:

[0093] A non-uniform load force simulation processing method based on numerical calculation includes the following contents:

[0094] Through the geometric feature recognition model created in advance, the object to be simulated is processed to extract the geometric feature information of the surface of the object to be simulated;

[0095] Using the surface information judgment model created in advance, the geometric feature information is processed to obtain the surface simulation information of the object to be simulated;

[0096] The load surface construction model created in advance is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated;

[0097] Use the non-uniform force simulation model created in advance to fit the non-uniform load and obtain the digital simulation load;

[0098] Based on the load analysis model created in advance, the digital simulation load is applied to the load application surface to obtain the non-uniform load simulation result, and the non-uniform load force simulation processing based on numerical calculation is completed.

[0099] In this embodiment, the method of processing the object to be simulated by using the geometric feature recognition model created in advance and extracting the geometric feature information of the surface of the object to be simulated is as follows:

[0100] Select a surface of the object to be simulated and extract the face identification of the surface for identification in subsequent operations;

[0101] After obtaining the face identification of a certain surface, extracting the edge information and corresponding node data inside the surface corresponding to the face identification;

[0102] When the surface corresponding to the face identifier is a complete cylindrical surface, the edge information includes circular edges on both sides;

[0103] When the surface corresponding to the face identifier is a subdivided cylindrical surface, the edge information includes the circular edges on both sides and the subdivided edges formed by the subdivided surface;

[0104] The surface identification, edge information and node data are coupled to obtain the geometric feature information of the surface of the object to be simulated.

[0105] In this embodiment, the method of using the surface information judgment model created in advance to process the geometric feature information to obtain the surface simulation information of the object to be simulated is as follows:

[0106] Obtaining geometric feature information, including face identification, edge information, and node data;

[0107] Check whether the edge information includes the circle center feature to determine whether the edge information is an arc edge and count the number of arc edges;

[0108] When the edge information includes the circle center feature, the edge information is an arc edge;

[0109] If there are two arc edges, it indicates that the surface of the object to be simulated is a continuous closed surface with two standard arcs, indicating that the fitting operation can be performed; at this time, the two arc edges and the center features are used as the surface simulation information of the object to be simulated;

[0110] When the edge information does not include the center information, or the number of arc edges is less than or more than two arc edges, it means that an error has occurred in the selected surface or the two side edges of the selected surface are not arc edges. In this case, it is necessary to reselect the surface of the object to be simulated.

[0111] In this embodiment: using the load surface construction model created in advance, reconstructing the surface simulation information, and obtaining the load application surface of the object to be simulated is as follows: obtaining two arc edges and a center feature in the surface simulation information;

[0112] According to the features of the two arc edges and the center of the circle, the midpoint coordinates and radius information of the two arc edges are calculated;

[0113] Based on the midpoint coordinates and radius information of the two arc edges, the arc distance between the midpoints of the two arc edges is calculated;

[0114] The arc distance is taken as the height of the ideal cylindrical surface, that is, the size of the ideal cylinder in the z-axis direction;

[0115] Based on the arc distance and combined with the radius information of the arc, an ideal cylindrical surface is constructed and used as the load application surface of the object to be simulated.

[0116] In this embodiment, the method of fitting the non-uniform force simulation model created in advance to obtain the digital simulation load is as follows:

[0117] Get the non-uniformly distributed load and set the load coordinate system;

[0118] The load coordinate system sets the axial direction of the cylindrical surface as the z-axis, and sets the x-axis and y-axis on the plane where the cylindrical surface is located;

[0119] Based on the load coordinate system, obtain the load angle between the force direction of the node and the x-axis;

[0120] According to the load angle and the sinusoidal change formula, a sinusoidal change load calculation function is constructed;

[0121] Based on the sinusoidal load calculation function, a digital simulation load is obtained.

[0122] In this embodiment: Based on the load analysis model created in advance, a digital simulation load is applied to the load application surface to obtain a non-uniformly distributed load simulation result as follows:

[0123] The digital simulation load is a sinusoidally varying load, which is transmitted to all nodes of the object to be simulated along the circumference of the load application surface or the cross section of the load application surface to obtain the node force;

[0124] The load application surface is a cylindrical surface. According to the bilateral symmetry of the cylindrical surface, the node force is decomposed to obtain the horizontal component in the x-axis direction and the longitudinal component in the y-axis direction. According to the principle of force balance, the horizontal component in the x-axis direction cancels out to zero, leaving only the longitudinal component in the y-axis direction.

[0125] The longitudinal forces of all nodes are accumulated and superimposed to obtain the total load force;

[0126] Based on the total load force and the global stiffness matrix of the cylindrical surface, the simulation results of non-uniform load are obtained.

[0127] In this embodiment: Based on the total load force and the stiffness matrix of the cylindrical surface, the method for obtaining the simulation result of the non-uniformly distributed load is as follows:

[0128] Based on the total load force and the global stiffness matrix of the cylindrical surface, a linear equation system is constructed and solved using a numerical method to obtain the displacement value of each node;

[0129] After obtaining the displacement value of the node, the strain vector inside the node is calculated according to the strain-displacement matrix;

[0130] Next, based on the material elastic matrix and strain vector, the relationship between strain and stress is constructed, and the stress information of the node is calculated;

[0131] According to the stress information of the nodes, combined with the geometric characteristics and local stress distribution, the force analysis of the simulation object is carried out to obtain the simulation results of non-uniform load.

[0132] In this embodiment: Based on the stress information of the nodes, combined with the geometric features and the local stress distribution, the method for performing force analysis on the simulation object is as follows:

[0133] Based on the stress information of the nodes, analyze the stress distribution of each node and screen out the areas of stress concentration;

[0134] Based on the stress information of the nodes, calculate the deformation of the object to be simulated under the load.

[0135] According to the deformation amount, the deformation of the object to be simulated under the action of non-uniform load is determined, and whether the object to be simulated will have excessive deformation or failure risk in actual use is judged to obtain the deformation analysis result;

[0136] The stress distribution, deformation and deformation analysis results are summarized to generate a mechanical properties report, which is used to evaluate the feasibility and safety of the design scheme of the object to be simulated.

[0137] A specific embodiment of the non-uniform load force simulation processing system based on numerical calculation of the present invention:

[0138] The non-uniform load force simulation processing system based on numerical calculation includes a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module:

[0139] A geometric feature recognition module is used to process the object to be simulated and extract geometric feature information of the surface of the object to be simulated;

[0140] The surface information judgment module is used to process the geometric feature information to obtain the surface simulation information of the object to be simulated;

[0141] A load surface construction module is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated;

[0142] The non-uniform force simulation module is used to fit the non-uniform load and obtain the digital simulation load;

[0143] The load analysis module is used to apply the digital simulation load to the load application surface to obtain the non-uniform load simulation result.

[0144] In this embodiment: the load analysis module includes a stress analysis unit and a strain analysis unit;

[0145] Stress analysis unit, used to calculate the stress distribution of each node and obtain the area where stress concentration occurs;

[0146] The strain analysis unit is used to calculate the deformation and strain distribution under the action of non-uniform load, and to obtain the deformation behavior of the object to be simulated under the non-uniform load.

[0147] In this embodiment: a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module are encapsulated to form an algorithm module; and an interactive interface and a result visualization module are provided to be connected with the algorithm module; through the interactive interface, interactive information is obtained, and the algorithm module is called for analysis and processing to obtain non-uniform load simulation results; the non-uniform load simulation results are transmitted to the result visualization module for visual presentation, and the presentation content at least includes a stress distribution diagram and a deformation cloud diagram to show the structural changes of the object to be simulated under the action of the non-uniform load.

[0148] A second specific embodiment of the non-uniform load force simulation processing method based on numerical calculation of the present invention:

[0149] A non-uniform load force simulation processing method based on numerical calculation includes the following contents:

[0150] Step 1, using the geometric feature recognition unit, to perform geometric feature recognition and extraction, which includes the following contents:

[0151] In the simulation processing system, the feature data of the three-dimensional model of the object to be simulated input by the user is first identified to obtain the face identification number and corresponding node data of the three-dimensional model; then, the face identification number to which the user needs to apply the load is obtained through interaction, and the selected face must be a feature area such as a standard cylindrical surface or cylindrical shell.

[0152] In this embodiment: according to the actual needs of the analysis, a load analysis model is constructed, and the load force distribution is calculated according to the non-uniform load with sinusoidal variation, which includes the following contents:

[0153] The sine function is used to describe the distribution of load on the cylindrical surface or the edge line of the shell. It is suitable for analyzing the mechanical behavior under normal static conditions. In this non-uniform load implementation method, the sinusoidal load is determined as the default loading method.

[0154] Figure 2 The force distribution of the cross section of a cylindrical solid or cylindrical shell according to a non-uniformly distributed load with a sinusoidal variation is shown in the figure. The direction of the force components, x-axis and y-axis, are shown in the lower left corner. The axial direction of the cylindrical surface is set to the z-axis, and the force at each node is , n represents the node number, then the angle between the node force and the horizontal x-axis is .

[0155] At this time, if the total input load force is , the present invention will follow this sinusoidal loading method, that is, The function form transfers the load to all nodes along the circumference of the selected edge or the cross section of the selected cylindrical surface. Since the cylindrical surface is bilaterally symmetrical, the node force here can be decomposed and analyzed, and each node force is decomposed into a horizontal x-axis component force. and the vertical y-axis force , we can get the following formula:

[0156]

[0157]

[0158] The main variable of the force decomposition here is the angle , which has nothing to do with the size of the cylinder. Each node is assigned a value according to the divided node position, which is expressed as extracting node information and using the inverse tangent function to calculate the angle corresponding to the node. , and then distribute the corresponding load force. The calculation formula of the inverse tangent function is as follows:

[0159]

[0160] in, is the displacement component of the center of the circle corresponding to the node on the x-axis, is the displacement component of the circle center corresponding to the node on the y-axis.

[0161] Since this force distribution section is horizontally symmetrical, according to the principle of force balance, the force distribution in the x-axis direction cancels out and becomes zero, leaving only the force component in the y-axis direction. The relationship with the total load force is as follows:

[0162]

[0163] Where m is the total number of nodes along the circumference.

[0164] The total number of nodes can be extracted using the Ansys.Mechanical.DataModel library in the high-level programming language Python.

[0165] According to the above formula, the load force distribution when a load is applied to such a cylinder can be determined, such as Figure 3 shown.

[0166] Step 2: Encapsulate the geometric feature recognition unit, the surface information judgment unit, the load surface construction model and the load analysis module to obtain an algorithm model, which can facilitate users to call the algorithm model, and includes the following contents:

[0167] In the numerical calculation simulation processing system, the user first selects the geometric feature area (corresponding surface identification number) to be analyzed through the interactive interface, and then the system calls the algorithm module to perform the preset load distribution operation.

[0168] This modeling encapsulation and automatic calling design greatly improves the flexibility and ease of use of the present invention, allowing users to complete high-precision load analysis without in-depth understanding of complex mechanical theories, thereby providing effective technical support for engineering design and optimization.

[0169] Step 3: Use the encapsulated algorithm model to perform numerical calculations and analysis, which includes the following:

[0170] After the algorithm model completes the initial load processing, the present invention will perform in-depth numerical calculations on the simulation object according to the parameter load input by the user. These calculations are not limited to basic mechanical analysis, but also include a series of complex calculations of various physical quantities such as stress, strain, displacement, etc., to comprehensively evaluate the mechanical behavior of the entity under the action of non-uniformly distributed loads.

[0171] In the numerical calculation process, the calculation of stress, strain and displacement in structural mechanics is carried out through a series of steps, including the following:

[0172] The solution to the displacement depends on the global stiffness matrix. The stiffness matrix is ​​a square matrix whose dimension depends on the number of degrees of freedom of the system. For example, for a system with n degrees of freedom, the stiffness matrix is ​​an n×n matrix. The stiffness matrix is ​​constructed by combining the stiffness matrices of each unit to describe the relationship between the degrees of freedom in the structure and to predict the force response when a unit displacement is applied, that is, the node displacement vector. The calculation formula is as follows:

[0173]

[0174] in, is the global stiffness matrix, is the node displacement vector, is the force component at the node.

[0175] Furthermore, according to the node displacement vector, the strain vector can be calculated, and its calculation formula is as follows:

[0176]

[0177] in: is the strain vector, is the strain-displacement matrix.

[0178] After obtaining the strain vector, the stress is calculated according to the stress-strain formula. The calculation formula is as follows:

[0179]

[0180] in, is the stress vector, is the material elastic matrix.

[0181] The node displacement vector represents the displacement of all nodes. In 3D modeling, each node usually has 6 degrees of freedom, so the node displacement vector includes information about all these degrees of freedom. External forces are represented by a node force vector, which is distributed according to specific non-uniform loads and includes forces and torques along the three coordinate axes.

[0182] By introducing appropriate boundary conditions, constructing a linear system of equations, and solving them numerically, the displacement value of each node can be obtained. After obtaining the node displacement, the strain inside the unit can be calculated. This process is calculated through the strain-displacement matrix and the displacement vector.

[0183] Next, the relationship between strain and stress is used to calculate stress. Stress calculation involves the elastic properties of the material, especially when considering isotropic materials, a simplified elastic matrix can be used to describe its mechanical behavior.

[0184] In this embodiment: according to the geometric model and loading conditions specified by the user, a stress analysis unit and a strain analysis unit are set in the algorithm model, and other algorithm models are combined to simulate the application of non-uniform loads to the selected area, and numerical calculations are started in combination with physical boundary conditions and material properties.

[0185] The stress analysis unit calculates the stress distribution on each node or element, focusing on areas where stress concentration may occur; the strain analysis unit calculates the deformation and strain distribution under load to help users understand the deformation behavior of the material under load.

[0186] The key to the stress concentration judgment standard is to ensure the mesh independence of the analysis results, that is, the calculation results of the stress concentration area should be independent of the fineness of the mesh division. When performing finite element analysis, the stress concentration area should be stable under different mesh densities, and the change of mesh density should not significantly affect the results. If there is a significant difference in the calculation results under coarse and fine meshes, it may indicate that the mesh division is not fine enough, resulting in inaccurate stress concentration assessment.

[0187] In addition, stress concentration can also be judged by the sharp increase in stress at geometric discontinuities, such as holes, grooves, or structural protrusions. These areas usually show higher local stresses, so in addition to mesh independence, it is necessary to combine geometric characteristics and local stress distribution to fully evaluate stress concentration.

[0188] Furthermore, the present invention also performs deformation analysis, and displays the deformation of the three-dimensional model under the action of non-uniformly distributed loads by solving the displacement field. This analysis can help users determine whether the entity will have excessive deformation or failure risk in actual use. The judgment standard for excessive deformation depends on the enterprise standard. The default value (such as 10 wires) will be set in the software according to the national standard requirements, which can be modified interactively.

[0189] By integrating various analysis results such as stress, strain and deformation, the present invention can generate a detailed mechanical property report to help users accurately evaluate the feasibility and safety of design solutions.

[0190] Therefore, these numerical calculations of the present invention ensure that the analysis results can truly reflect the stress condition of the entity under the action of non-uniformly distributed loads, provide reliable data support, and assist users in structural optimization, material selection and process improvement.

[0191] Step 4: Visualize and provide feedback on the analysis results, which includes the following:

[0192] After the calculation is completed, the simulation processing system will present the results to the user in a visual way, including stress distribution diagrams, deformation cloud diagrams, etc. Users can intuitively observe the structural changes after the load is applied, and adjust and optimize the design plan as needed.

[0193] A third specific embodiment of the non-uniform load force simulation processing method based on numerical calculation of the present invention:

[0194] A non-uniform load force simulation processing method based on numerical calculation, in the process of fitting a non-ideal cylindrical surface, firstly, it is necessary to extract the geometric feature information of the selected non-ideal cylindrical surface. This information includes the surface identification number, the internal edge information of the surface, and the node data. With this data, a detailed geometric analysis of the non-ideal cylindrical surface can be performed to determine whether it meets the fitting conditions of the ideal cylindrical surface, which specifically includes the following contents:

[0195] Step 1: Use the geometric feature recognition unit to extract feature information and make preliminary judgments, which includes the following:

[0196] Step 11, after the user selects a specific surface in the simulation processing system, the surface identification number, edge information and node data are extracted, and the identification number of the surface is recorded for identification of subsequent operations.

[0197] After obtaining the face identification number, the present invention will extract the edge information and corresponding node data inside the face.

[0198] In this embodiment, when the user selects a cylindrical surface through interaction, the present invention will first mark the identification number information of the cylindrical surface, and then read the edge information of the cylindrical surface. If the cylindrical surface is a complete cylindrical surface, the entire surface only contains circular edges on both sides. If the cylindrical surface is a divided cylindrical surface, it will contain circular edges on both sides and divided edges formed by the divided surface, which is generally expressed as a rectangle.

[0199] Step 12, by analyzing the geometric data of the edge, determine whether the edge is an arc edge. This can be done by checking whether the edge data contains the center information. For example, in the edge features that may appear in the above-mentioned cylindrical surface, the circular edges on both sides will have the center feature, while the subdivided edge does not have the center feature, so it can be judged by identifying the center feature of the edge. If the node data of an edge contains the center information, the edge is an arc edge. The key to this step is to ensure that the model contains accurate arc information, which is the basis for the subsequent fitting of the ideal cylindrical surface.

[0200] Step 2, using the surface information judgment unit to confirm the number of arc edges, which includes the following:

[0201] After determining whether there is an arc in the three-dimensional model, the present invention will further count the number of arc edges inside the selected face. If there are two arc edges in the three-dimensional model, the next fitting operation can be performed. If there are less than or more than two arc edges, the present invention will prompt the user that the selected face does not meet the requirements and display the current number of arc edges so that the user can adjust or reselect. If there are less than two arc edges, it means that the user has made an error in selecting the face or the three-dimensional model is incorrect, which is manifested by the user not selecting the face correctly or the two side edges of the selected face are non-arc edges. It is necessary to select a continuously closed surface with two standard arcs or to correct the three-dimensional model according to this standard.

[0202] Step 3, based on the load surface construction model, the ideal cylindrical surface is fitted and constructed, which includes the following contents:

[0203] Step 31, once the three-dimensional model is confirmed to be correct, the present invention will extract the geometric information of the two arcs, especially the midpoint coordinates and radius of the arcs. This information is crucial for the subsequent ideal cylindrical surface construction.

[0204] Step 32, using the extracted arc midpoint coordinates , calculate the distance L between the midpoints of the two arcs. This distance L is the height of the ideal cylindrical surface, that is, the size of the ideal cylinder in the Z-axis direction.

[0205] The formula for calculating the distance L between the midpoints of two arcs is as follows:

[0206]

[0207] Step 33, combining the radius information R of the arc and the distance L between the midpoints of the two arcs, construct an ideal cylindrical surface, such as Figure 4 This cylindrical surface will be used as the fitting result of the non-ideal cylindrical surface and can be used for subsequent non-uniform load analysis.

[0208] Step 34. Through the above steps, the present invention can automatically identify and fit the ideal cylindrical surface, so that even when faced with a non-ideal cylindrical surface with curvature during the processing process, accurate numerical analysis and load application can be performed, thereby improving the analysis accuracy and applicability of the simulation processing system under complex geometric features.

[0209] The present invention avoids the technical problem of failure in applying non-uniformly distributed loads by estimating these non-standard cylindrical surfaces as ideal cylindrical surfaces. Although actual parts have slight processing deviations, this estimation method can guarantee the accuracy of the calculation results in most cases without introducing significant errors. Therefore, the present invention proposes to introduce this function in a simulation processing system for numerical calculation, automatically complete the fitting process of the ideal cylindrical surface, so that when facing a non-ideal cylindrical surface, the numerical analysis of non-uniformly distributed loads can also be successfully performed.

[0210] A specific embodiment of applying the present invention to perform fitting analysis on a certain bearing seat model:

[0211] During the processing of many shaft and bearing parts, the cylindrical surface is often designed with a certain curvature instead of a standard cylindrical surface, considering the requirements of casting and assembly process. Figure 5 and Figure 6 . Figure 5 It is an oblique view of the inner wall of the cast flange-type square bearing seat; Figure 6 This is a side view of the inner wall of a cast flange-type square bearing seat, where bm represents the inner wall of the bearing seat. The inner wall bm has a certain curvature. This design will cause difficulties in simulating non-uniform loads.

[0212] Furthermore, in order to verify the specific implementation effect of the present invention, the present invention selects a bearing seat model as a test case, that is, Figure 7 The suspended bearing seat shown. This embodiment includes uploading a three-dimensional model, setting a non-uniform load scheme, setting a total load and boundary conditions, and displaying results, which specifically includes the following contents:

[0213] Step 1: The user first uploads the suspended bearing seat model on the interactive interface of the simulation processing system of the present invention. The upload interface only requires the user to click the "Upload 3D Model" button in the interface, and the simulation processing system will pop up a file selection window, and the user can select the required 3D model file from the local file system. After the selection is completed, click the confirmation button, and the 3D model file will be quickly uploaded to the system of the present invention, ready for subsequent analysis operations.

[0214] Step 2: Set up the non-uniform load force simulation system through the input interface. The input interface contains a parameter input box, allowing users to adjust the parameters of the non-uniform load control formula. The interface also provides a "Confirm" button, which allows users to save the solution settings with one click and continue with the subsequent pre-processing settings.

[0215] Step 3. The user can define the total load size in the setting interface. Its direction is limited to the -z axis in this simulation processing system. The user needs to adjust the direction of the 3D model according to this limited direction to ensure that the load is reasonably applied to the 3D model. The interface provides options to specify boundary conditions, that is, to set fixed support surfaces to ensure that the 3D model conforms to the actual physical environment during the calculation process. Users can intuitively adjust these settings through the graphical interface. After the settings are completed, click the "Apply" button to save and apply these conditions and prepare to enter the numerical calculation stage.

[0216] Step 4: Display the analysis results through a graphical interface, including visualization charts of mechanical properties such as stress, strain, and deformation. Users can view details such as stress distribution and deformation in different directions by switching views. At the same time, the interface provides zoom, move, and rotate functions, allowing users to deeply analyze the stress state of the 3D model. The result data can also be exported as a numerical analysis report. Through intuitive display, users can quickly evaluate the design effect and make adjustment decisions.

[0217] An embodiment of a device applying the method of the present invention:

[0218] An electronic device comprising:

[0219] one or more processors;

[0220] A storage device for storing one or more programs;

[0221] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned non-uniform load force simulation processing method based on numerical calculation.

[0222] A computer medium embodiment using the method of the present invention:

[0223] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned non-uniform load force simulation processing method based on numerical calculation.

[0224] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, and computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0225] The present application is described by flowcharts or / and block diagrams of the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each process or / and block in the flowchart or / and block diagram and the combination of the processes or / and blocks in the flowchart or / and block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart or / and block diagram. Figure 1 Process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0226] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 Process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0227] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 Process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0228] The geometric feature recognition model, surface information judgment model, load surface construction model, non-uniform force simulation model, and load analysis model in the present application are respectively an object that objectively describes the morphological structure with the help of physical or virtual expressions. The object is not equal to the object and is not limited to physical and virtual. It can be a data processing function, software program, processing mode, usage method, operation method, workflow, application process, electronic hardware, circuit model, processing system, system imitation or simulation object.

[0229] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention with equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for simulating non-uniform load force based on numerical calculation, characterized in that: Includes the following: Through the geometric feature recognition model created in advance, the object to be simulated is processed to extract the geometric feature information of the surface of the object to be simulated; Using the surface information judgment model created in advance, the geometric feature information is processed to obtain the surface simulation information of the object to be simulated; The method is as follows: Obtaining geometric feature information, including face identification, edge information, and node data; Check whether the edge information includes the circle center feature to determine whether the edge information is an arc edge and count the number of arc edges; When the edge information includes the circle center feature, the edge information is an arc edge; If there are two arc edges, it indicates that the surface of the object to be simulated is a continuous closed surface with two standard arcs, indicating that the fitting operation can be performed; at this time, the two arc edges and the center features are used as the surface simulation information of the object to be simulated; When the edge information does not include the circle center information, or the number of arc edges is less than or more than two arc edges, it means that an error has occurred in the selected surface or the two sides of the selected surface are not arc edges, and you need to reselect the surface of the object to be simulated; The load surface construction model created in advance is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated; Use the non-uniform force simulation model created in advance to fit the non-uniform load and obtain the digital simulation load; the method is as follows: Get the non-uniformly distributed load and set the load coordinate system; The load coordinate system sets the axial direction of the cylindrical surface as the z-axis, and sets the x-axis and y-axis on the plane where the cylindrical surface is located; Based on the load coordinate system, obtain the load angle between the force direction of the node and the x-axis; According to the load angle and the sinusoidal change formula, a sinusoidal change load calculation function is constructed; Based on the sinusoidal load calculation function, a digital simulation load is obtained; Based on the load analysis model created in advance, the digital simulation load is applied to the load application surface to obtain the non-uniform load simulation result, and the non-uniform load force simulation processing based on numerical calculation is completed.

2. A non-uniform load force simulation processing method based on numerical calculation as claimed in claim 1, characterized in that: The method of processing the object to be simulated by using the geometric feature recognition model created in advance and extracting the geometric feature information of the surface of the object to be simulated is as follows: Select a surface of the object to be simulated and extract the face identification of the surface for identification in subsequent operations; After obtaining the face identification of a certain surface, extracting the edge information and corresponding node data inside the surface corresponding to the face identification; When the surface corresponding to the face identifier is a complete cylindrical surface, the edge information includes circular edges on both sides; When the surface corresponding to the face identifier is a subdivided cylindrical surface, the edge information includes the circular edges on both sides and the subdivided edges formed by the subdivided surface; The surface identification, edge information and node data are coupled to obtain the geometric feature information of the surface of the object to be simulated.

3. The method for simulating a non-uniform load force based on numerical calculation according to claim 1, characterized in that: The method of using the previously created load surface construction model to reconstruct the surface simulation information and obtain the load application surface of the object to be simulated is as follows: Obtain two arc edges and circle center features in the surface simulation information; According to the features of the two arc edges and the center of the circle, the midpoint coordinates and radius information of the two arc edges are calculated; Based on the midpoint coordinates and radius information of the two arc edges, the arc distance between the midpoints of the two arc edges is calculated; The arc distance is taken as the height of the ideal cylindrical surface, that is, the size of the ideal cylinder in the z-axis direction; Based on the arc distance and combined with the radius information of the arc, an ideal cylindrical surface is constructed and used as the load application surface of the object to be simulated.

4. The method for simulating a non-uniform load force based on numerical calculation according to claim 1, characterized in that: Based on the load analysis model created in advance, the digital simulation load is applied to the load application surface to obtain the non-uniform load simulation result as follows: The digital simulation load is a sinusoidally varying load, which is transmitted to all nodes of the object to be simulated along the circumference of the load application surface or the cross section of the load application surface to obtain the node force; The load application surface is a cylindrical surface. According to the bilateral symmetry of the cylindrical surface, the node force is decomposed to obtain the horizontal component in the x-axis direction and the longitudinal component in the y-axis direction. According to the principle of force balance, the horizontal component in the x-axis direction cancels out to zero, leaving only the longitudinal component in the y-axis direction. The longitudinal forces of all nodes are accumulated and superimposed to obtain the total load force; Based on the total load force and the global stiffness matrix of the cylindrical surface, the simulation results of non-uniform load are obtained.

5. The method for simulating and processing non-uniform load force based on numerical calculation according to claim 4, characterized in that: Based on the total load force and the stiffness matrix of the cylindrical surface, the method to obtain the simulation results of non-uniform load is as follows: Based on the total load force and the global stiffness matrix of the cylindrical surface, a linear equation system is constructed and solved using a numerical method to obtain the displacement value of each node; After obtaining the displacement value of the node, the strain vector inside the node is calculated according to the strain-displacement matrix; Next, based on the material elastic matrix and strain vector, the relationship between strain and stress is constructed, and the stress information of the node is calculated; According to the stress information of the nodes, combined with the geometric characteristics and local stress distribution, the force analysis of the simulation object is carried out to obtain the simulation results of non-uniform load.

6. The method for simulating and processing non-uniform load force based on numerical calculation according to claim 5, characterized in that: According to the stress information of the nodes, combined with the geometric characteristics and local stress distribution, the method for force analysis of the simulation object is as follows: Based on the stress information of the nodes, analyze the stress distribution of each node and screen out the areas of stress concentration; Based on the stress information of the nodes, calculate the deformation of the object to be simulated under the load. According to the deformation amount, the deformation of the object to be simulated under the action of non-uniform load is determined, and whether the object to be simulated will have excessive deformation or failure risk in actual use is judged to obtain the deformation analysis result; The stress distribution, deformation and deformation analysis results are summarized to generate a mechanical properties report, which is used to evaluate the feasibility and safety of the design scheme of the object to be simulated.

7. A non-uniform load force simulation processing system based on numerical calculation, characterized in that: A non-uniform load force simulation processing method based on numerical calculation as described in any one of claims 1 to 6 is adopted, which includes a geometric feature recognition module, a surface information judgment module, a load surface construction module, a non-uniform force simulation module and a load analysis module: A geometric feature recognition module is used to process the object to be simulated and extract geometric feature information of the surface of the object to be simulated; The surface information judgment module is used to process the geometric feature information to obtain the surface simulation information of the object to be simulated; A load surface construction module is used to reconstruct the surface simulation information to obtain the load application surface of the object to be simulated; The non-uniform force simulation module is used to fit the non-uniform load and obtain the digital simulation load; The load analysis module is used to apply the digital simulation load to the load application surface to obtain the non-uniform load simulation result.

8. The non-uniform load force simulation processing system based on numerical calculation according to claim 7, characterized in that: The load analysis module includes a stress analysis unit and a strain analysis unit; Stress analysis unit, used to calculate the stress distribution of each node and obtain the area where stress concentration occurs; The strain analysis unit is used to calculate the deformation and strain distribution under the action of non-uniform load, and to obtain the deformation behavior of the object to be simulated under the non-uniform load.

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