Strength analysis method and system of a magazine window assembly with a support limiting mechanism

Abstract

The application relates to a strength analysis method and system of a magazine window assembly with a supporting limiting mechanism. A finite element model formed according to a grid model of connecting points of various parts of the magazine window assembly in a whole vehicle coordinate system can obtain the types of the connecting points, and a magazine window tree structure table is created in combination with a bom table. The finite element model is analyzed under different working condition boundary conditions to obtain stress nephograms corresponding to the working conditions. According to the magazine window tree structure table and the stress nephograms, and in combination with target strength nephograms corresponding to the different working condition boundary conditions, the parts and the connecting points to be optimized are screened out. The stress conditions of different parts and connecting points between the parts under different working conditions are simulated and analyzed, and in combination with the target strength nephograms and the magazine window tree structure table, the influencing factors not meeting the requirements in the design scheme can be accurately known at one time, the advantages and disadvantages of the design scheme are determined in the design and development stage, the analysis steps are saved, and the optimal design scheme can be quickly optimized and iterated.

Description

Technical Field

[0001] The present application relates to the field of automotive parts design, and in particular to a strength analysis method and system for a window replacement assembly with a support and limiting mechanism. Background Art

[0002] When the bullet-changing window assembly is in the closed state, it is bulletproof, dustproof and waterproof; when the bullet-changing window assembly is in the open state, the support rod is used to limit the position to be in an upright state to serve as a shield at the rear, providing bulletproof protection for the rear.

[0003] The structural strength of the bullet-replacement window assembly with a support and limiting mechanism needs to meet the design requirements in both the closed and open states. However, factors affecting the strength in both the closed and open states include torsion bars, support rods, welding points, hinge points, etc. The relevant strength analysis methods are difficult to quickly and comprehensively analyze the above factors and determine which one does not meet the requirements, resulting in a complex iterative design optimization process and difficulty in clarifying the advantages and disadvantages of the design scheme during the design and development stage. Summary of the Invention

[0004] The embodiments of the present application provide a method and system for analyzing the strength of a bullet-changing window assembly with a support and limiting mechanism, so as to solve the problem in the related art that it is difficult to quickly and comprehensively analyze the strength of a bullet-changing window assembly with a support and limiting mechanism.

[0005] In a first aspect, a strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism is provided, comprising:

[0006] Establish mesh models of each part of the window replacement assembly in the vehicle coordinate system, and connect each mesh model to form a finite element model;

[0007] Obtaining the connection point type according to the finite element model, and then creating a pop-up window tree structure table about the finite element model in combination with the bom table;

[0008] Analyzing the finite element model under different working condition boundary conditions to obtain stress cloud diagrams corresponding to the working conditions;

[0009] According to the pop-up window tree structure table and stress cloud map, and in combination with the target strength cloud map corresponding to different working condition boundary conditions, analysis is performed to screen out the parts and connection points to be optimized.

[0010] In some embodiments, establishing a mesh model of each component of the bullet-replacement window assembly includes the following steps:

[0011] The sheet metal parts and tube profile parts in the swap pop-up assembly are meshed using shell elements to establish the corresponding mesh model;

[0012] The rods and castings in the swap pop-up window assembly are meshed using solid elements to establish the corresponding mesh model;

[0013] The sheet metal parts include a bullet-changing window top cover and a vehicle roof cover connected to the bullet-changing window; the tube profile parts include a vehicle roof cover reinforcement beam and a bullet-changing window top cover reinforcement beam;

[0014] The rod comprises a torsion rod and a support and limiting mechanism; the casting comprises a hinge mechanism and a locking mechanism.

[0015] In some embodiments, connecting the mesh models to form a finite element model includes the following steps:

[0016] Get the BOM table of the pop-up window assembly;

[0017] Define the material of each part according to the BOM table, and define the material thickness of the part created by shell elements;

[0018] The connection points between parts connected by bolts are connected through rigid units; the connection points between parts connected by welding are connected through shell unit common nodes; the connection points between parts connected by spot welding are connected through welding unit combination unit weld point model units to form the finite element model.

[0019] In some embodiments, obtaining the connection point type according to the finite element model and then creating a pop-up window tree structure table for the finite element model in combination with the bom table includes the following steps:

[0020] The mesh model corresponding to each part is formed into a single component, and then named according to the project code, part number, material name, and material thickness to obtain the corresponding child node;

[0021] Put all the connection points of the rigid elements into the same component, name it RBE2, and get the corresponding child nodes;

[0022] According to the material thickness, each connection point connected by welding is set to a corresponding component, and then named according to the project number, pop-up window assembly code, welding material, and material thickness to obtain multiple corresponding child nodes;

[0023] According to the number of welding layers, all connection points connected by spot welding are set to a component, and then named according to the project number, pop-up window assembly code, SPOT-layer number, and combined unit weld point model unit to obtain corresponding multiple child nodes;

[0024] According to the number of welding layers, the welding core 3D unit used in spot welding is set to a component, and then named according to the project number, pop-up window assembly code, SPOT-number of layers, and ACM-SOLID to obtain the corresponding child node;

[0025] Set up an assembly for each of the lock mechanism, hinge mechanism, and support limit mechanism, and then name them according to the project code and assembly code to obtain multiple corresponding child nodes;

[0026] Gather all the above child nodes to form a pop-up window tree structure table.

[0027] In some embodiments, analyzing the finite element model under different operating boundary conditions to obtain a stress cloud diagram corresponding to the operating condition includes the following steps:

[0028] When the bullet-replacement window assembly is closed, the finite element model is subjected to strength analysis of the mounting point and the torsion bar end to obtain the corresponding stress contours.

[0029] When the bullet-changing window assembly is open, the finite element model is subjected to impact analysis and frequency sweep analysis to obtain the corresponding stress cloud diagram.

[0030] In some embodiments, when the bullet-replacement window assembly is closed, performing a mounting point strength analysis and a torsion bar end strength analysis on the finite element model to obtain corresponding stress contours includes the following steps:

[0031] Adjust the pop-up window of the finite element model to the closed state, cancel the torsion bar connection, apply the extracted node support reaction force to the hinge mechanism, and apply gravity to obtain the corresponding stress cloud map;

[0032] The pop-up window of the finite element model is adjusted to the closed state, and the strength of the left and right hinges of the hinge mechanism are analyzed respectively. The steps for the strength analysis of the left hinge are as follows: full constraint of the fixed points, contact between the left end of the torsion bar and the mounting slot of the left hinge, and grabbing the cross-sectional unit of the shaft diameter of the right end of the torsion bar; constraining the main nodes of the rigid unit; releasing the Y-direction movement and rotation of the vehicle coordinate system according to the actual installation state of the torsion bar; applying the extraction torque to obtain the stress cloud map.

[0033] In some embodiments, obtaining the extracted node reaction force and the extracted torque includes the following steps:

[0034] One end of the mesh model of the torsion bar is constrained and fixed, and the forced displacement and torsion angle parameters of the torsion bar from the design state to the closed state are applied to the other end to obtain the extracted node support reaction force and extracted torque.

[0035] In some embodiments, when the bullet-changing window assembly is in the open state, impact analysis and frequency sweep analysis are performed on the finite element model to obtain corresponding stress contours, including the following steps:

[0036] Adjust the finite element model's bullet-replacement window to its maximum opening angle, then apply the designed gravity acceleration in the X, Y, and Z directions of the vehicle coordinate system to obtain the stress cloud corresponding to the impact condition.

[0037] Adjust the spring-loaded window of the finite element model to the maximum opening angle, then fully constrain the hinge mounting holes of the hinge mechanism and the mounting holes of the support limit mechanism. Load the designed acceleration excitation along the X, Y, and Z directions of the vehicle coordinate system, and sweep the frequency from 0 to 100 Hz to obtain the frequency stress curve and stress cloud map.

[0038] In some embodiments, an analysis is performed based on the pop-up window tree structure table and the stress cloud map, combined with target strength cloud maps corresponding to different working condition boundary conditions, to screen out parts and connection points to be optimized, including the following steps:

[0039] Obtain the target strength cloud map corresponding to the boundary conditions of different working conditions, and then find the target stress values ​​corresponding to the parts and connection points in the pop-up window tree structure table in the target strength cloud map;

[0040] Find the actual stress values ​​corresponding to the parts and connection points in the tree structure table in the pop-up window in the stress cloud diagram corresponding to the boundary conditions of different working conditions;

[0041] Compare the actual stress value and target stress value corresponding to each working condition boundary condition;

[0042] If the actual stress value under all working condition boundary conditions is less than the target stress value, the bullet-changing window assembly with the support and limit mechanism meets the requirements;

[0043] Otherwise, it is not satisfied, and the parts and connection points corresponding to the actual stress values ​​greater than or equal to the target stress values ​​are taken as the parts and connection points to be optimized;

[0044] The stress is the maximum stress value.

[0045] In a second aspect, a bullet-changing window assembly strength analysis system with a support and limiting mechanism is provided, comprising:

[0046] The first module is used to establish mesh models of each part of the window replacement assembly in the vehicle coordinate system and connect each mesh model to form a finite element model;

[0047] The second module is used to obtain the connection point type according to the finite element model, and then create a pop-up window tree structure table about the finite element model in combination with the bom table;

[0048] The third module is used to analyze the finite element model under different working condition boundary conditions to obtain a stress cloud diagram corresponding to the working condition;

[0049] The fourth module is used to analyze the target strength cloud map corresponding to the pop-up window tree structure table and stress cloud map in combination with the target strength cloud map corresponding to different working conditions and boundary conditions to screen out the parts and connection points to be optimized.

[0050] The beneficial effects of the technical solution provided by this application include:

[0051] An embodiment of the present application provides a strength analysis method and system for a pop-up window assembly with a support and limiting mechanism. The type of connection point can be obtained based on a finite element model formed by connecting a grid model of each part of the pop-up window assembly in the coordinate system of the entire vehicle, and then a pop-up window tree structure table is created in combination with the bom table; the finite element model is then analyzed under different working condition boundary conditions to obtain a stress cloud map corresponding to the working condition; according to the pop-up window tree structure table and the stress cloud map, and in combination with the target strength cloud map corresponding to the different working condition boundary conditions, analysis is performed to screen out parts and connection points to be optimized; the above steps can simulate and analyze the stress conditions of different parts and connection points between parts under different working conditions, and in combination with the target strength cloud map and the pop-up window tree structure table, the influencing factors that cause the design scheme to fail to meet the requirements can be accurately known at one time, the advantages and disadvantages of the design scheme can be clarified in the design and development stage, and the analysis steps can be saved, so as to drive designers to quickly optimize and iterate to obtain the optimal design scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0053] Figure 1 A schematic flow chart of a strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism provided in an embodiment of the present application;

[0054] Figure 2 A schematic diagram of a simulation of a finite element model of a bullet-replacement window assembly with a support and limiting mechanism provided in an embodiment of the present application;

[0055] Figure 3 A simulation diagram of obtaining and extracting node reaction forces and extraction torques provided in an embodiment of the present application;

[0056] Figure 4 A schematic diagram of a simulation of a finite element model of a hinge mechanism in a closed state under applied gravity provided in an embodiment of the present application;

[0057] Figure 5 A schematic diagram of a simulation for analyzing the strength of the left and right hinges of the hinge mechanism in the closed state provided in an embodiment of the present application;

[0058] Figure 6 A schematic diagram of a simulation of an impact condition with the bullet-replacement window open provided in an embodiment of the present application;

[0059] Figure 7 A simulation diagram of the frequency sweeping condition with the pop-up window open provided in an embodiment of the present application.

[0060] In the figure: 1. Replacement window top cover; 2. Replacement window top cover reinforcement beam; 3. Support and limit mechanism; 4. Hinge mechanism; 5. Lock mechanism; 6. Torsion bar; 7. Roof cover; 8. Roof cover reinforcement beam. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0062] The structural strength of the bullet-replacement window assembly with a support and limiting mechanism needs to meet the design requirements in both the closed and open states. However, factors affecting the strength in both the closed and open states include torsion bars, support rods, welding points, hinge points, etc. The relevant strength analysis methods are difficult to quickly and comprehensively analyze the above factors and determine which one does not meet the requirements, resulting in a complex iterative design optimization process and difficulty in clarifying the advantages and disadvantages of the design scheme during the design and development stage.

[0063] Therefore, on the first aspect, the embodiments of the present application provide a method and system for analyzing the strength of a bullet-changing window assembly with a support and limiting mechanism, so as to solve the problem in the related art that it is difficult to quickly and comprehensively analyze the strength of a bullet-changing window assembly with a support and limiting mechanism.

[0064] See also Figure 1 and Figure 2 A strength analysis method for a bullet-changing window assembly with a support and limiting mechanism comprises the following steps:

[0065] Step 100: Establish mesh models of various parts of the window replacement assembly in the vehicle coordinate system, and connect the mesh models to form a finite element model;

[0066] Step 101: Get the connection point type according to the finite element model, and then create a pop-up window tree structure table about the finite element model in combination with the bom table;

[0067] Step 102: Analyze the finite element model under different working condition boundary conditions to obtain a stress cloud diagram corresponding to the working condition;

[0068] Step 103: Analyze the target strength cloud maps corresponding to different working condition boundary conditions based on the tree structure table and stress cloud map in the pop-up window to select parts and connection points to be optimized.

[0069] The above steps first establish a comprehensive finite element model, including all parts of the pop-up window assembly and all connection forms between the two parts, so as to adapt to the actual situation. Then, the stress conditions of different parts and the connection points between parts under different working conditions are simulated and analyzed, that is, the conditions of each part under open and closed conditions can be taken into account. Then, combined with the target strength cloud map and the pop-up window tree structure table, the influencing factors that cause the design scheme to not meet the requirements can be accurately known at one time. The advantages and disadvantages of the design scheme can be clarified in the design and development stage, saving analysis steps, so that designers can quickly optimize and iterate to obtain the optimal design scheme.

[0070] In some preferred implementations, how to comprehensively and effectively establish a finite element model in step 100, and how to reflect the stress conditions of the bullet-replacement window assembly with a support and limiting mechanism when it is opened and closed, is described in detail below:

[0071] Step 10001, establishing a mesh model of each component of the pop-up window replacement assembly, including the following steps:

[0072] Step 10001-1: Mesh the sheet metal parts and tube profile parts in the swap pop-up window assembly using shell elements to establish a corresponding mesh model;

[0073] Step 10001-2: Mesh the rods and castings in the swap pop-up window assembly using solid elements to establish a corresponding mesh model;

[0074] Among them, the sheet metal parts include the pop-up window top cover 1 and the roof cover 7 connected to the pop-up window; the tube profile parts include the roof cover reinforcement beam 8 and the pop-up window top cover reinforcement beam 2; the rods include the torsion bar 6 and the support and limiting mechanism 3; the castings include the hinge mechanism 4 and the locking mechanism 5.

[0075] Step 10002, connecting the mesh models to form a finite element model, includes the following steps:

[0076] Step 10002-1. Obtain the BOM of the pop-up window assembly. The BOM is a file that describes the product structure in a data format and is a product structure data file that can be recognized by a computer.

[0077] Step 10002-2: Define the material of each part according to the BOM table, and define the material thickness of the part created by the shell element;

[0078] Step 10002-3: Connect the bolted connection points between parts using rigid elements RBE2; connect the welded connection points between parts using shell element common nodes; and connect the spot welded connection points between parts using a combined unit weld point model unit to form a finite element model. A combined unit weld point model unit is a combined unit weld point model unit composed of a hexahedral element HEXA and a connection element RBE3.

[0079] In the process of establishing the finite element model, the types of different parts and the characteristics of the connection points between parts are taken into consideration and established using different units, so as to be closer to the actual situation. At the same time, it is also convenient for the subsequent establishment of the pop-up window tree structure table and stress analysis to distinguish different parts.

[0080] In some preferred embodiments, in step 101, in order to facilitate subsequent analysis, screen parts and connection points to be optimized, accurately understand the factors affecting the design solution that does not meet the requirements, clarify the advantages and disadvantages of the design solution in the design and development stage, and save analysis steps, it is necessary to establish a pop-up window tree structure table. The specific method of establishing it is as follows:

[0081] Step 10101: Form the mesh model corresponding to each part into the same component, and then name it according to the project code, part number, material name, and material thickness to obtain the corresponding child node;

[0082] Step 10102: Put all the connection points of the rigid elements into the same component, name it RBE2, and get the corresponding child nodes;

[0083] Step 10103: Set a component for each connection point connected by welding according to the material thickness, and then name them according to the project number, assembly code, welding material, and material thickness to obtain corresponding sub-nodes; naming in HyperWorks needs to be in English, and weld is used here to identify the welding material.

[0084] Step 10104: Set a component for each connection point connected by spot welding according to the number of welding layers, and then name them according to the project number, pop-up window assembly code, SPOT-layer number, and combined unit weld point model unit to obtain corresponding multiple child nodes; SPOT-layer number is the number of welding layers;

[0085] Step 10105: Set a component for the welding core 3D unit used for spot welding according to the number of welding layers, and then name it according to the project number, pop-up window assembly code, SPOT-number of layers, and ACM-SOLID to obtain the corresponding child node;

[0086] Step 10106: Assign an assembly to each of the lock mechanism 5, hinge mechanism 4, and support and limit mechanism 3, and then name them according to the project code and assembly code to obtain multiple corresponding child nodes.

[0087] Step 10107: Gather all the above child nodes to form a pop-up window tree structure table.

[0088] The naming rules of the pop-up window tree structure table above are clearly hierarchical and clear, making it easy for simulation engineers to read information and operate.

[0089] In some preferred embodiments, for step 102, since the stress required for the bullet-changing window in the closed state and the open state is different, and the required design point in each case is different, it is necessary to consider various possible extreme working conditions of the bullet-changing window assembly in order to better guide the design engineers to optimize the bullet-changing window design. Therefore, the following settings are provided:

[0090] Step 102: Analyze the finite element model under different working condition boundary conditions to obtain a stress cloud diagram corresponding to the working condition, including the following steps:

[0091] Step 10200: When the bullet-replacement window assembly is closed, perform a strength analysis of the mounting point and a strength analysis of the torsion bar 6 end on the finite element model to obtain corresponding stress contours.

[0092] Step 10201: When the bullet-changing window assembly is open, perform impact working condition analysis and sweep frequency working condition analysis on the finite element model to obtain corresponding stress cloud diagrams.

[0093] Step 10200 specifically includes:

[0094] refer to Figure 3 , adjust the pop-up window of the finite element model to the closed state, cancel the torsion bar 6 connection, apply the extracted node support reaction force to the hinge mechanism 4, and apply gravity at the same time to obtain the corresponding stress cloud map; the gravity is 1G.

[0095] refer to Figure 4Close the finite element model's pop-up window and analyze the strength of the left and right hinges of hinge mechanism 4. The strength analysis steps for the left hinge are as follows: fully constrain the fixed points, establish contact between the left end of torsion bar 6 and the mounting slot of the left hinge, and capture the cross-sectional element at the right end of torsion bar 6's axial diameter; constrain the rigid element's primary nodes; release the Y-axis translation and rotation of the vehicle coordinate system based on the actual installation state of torsion bar 6; apply the extracted torque and generate a stress contour. The strength analysis for the right hinge follows the same approach as for the left hinge.

[0096] The process of obtaining the extracted node support reaction force and the extracted torque includes the following steps:

[0097] refer to Figure 5 , one end of the mesh model of the torsion bar 6 is constrained and fixed, and the other end is applied with the forced displacement and torsion angle parameters of the torsion bar 6 from the design state to the closed state to obtain the extracted node support reaction force and extracted torque.

[0098] Step 10201: When the bullet-replacement window assembly is in the open state, the finite element model is subjected to impact working condition analysis and frequency sweep working condition analysis to obtain corresponding stress cloud diagrams, including the following steps:

[0099] refer to Figure 6 , adjust the pop-up window of the finite element model to the maximum opening angle, and then apply the designed gravity acceleration, that is, 3.5G acceleration, in the X, Y, and Z directions of the vehicle coordinate system to obtain the stress cloud map corresponding to the impact condition; its focus is on the stress distribution of the support and limit mechanism under the impact condition. Figure 7 The different colors in the middle right side refer to the magnitude of stress;

[0100] refer to Figure 7 , adjust the pop-up window of the finite element model to the maximum opening angle, then fully constrain the hinge mounting holes of the hinge mechanism 4 and the mounting holes of the support limit mechanism, load the designed acceleration excitation along the three directions of the vehicle coordinate system X, Y, and Z respectively, and sweep the frequency from 0 to 100 Hz to obtain the frequency stress curve and stress cloud map. The frequency stress curve can be used in conjunction with the stress cloud map to analyze the stress at different frequencies and determine the maximum stress. It focuses on the stress distribution of the hinge mechanism 4. That is, the frequency stress curve can be used to identify risky areas or nodes, and then find the corresponding parts in the stress cloud map for analysis. This can facilitate subsequent design personnel to analyze and optimize the opening condition and provide specific optimization directions. In addition, the factors considered for the additional frequency stress curve under this opening condition are that when the worst condition under the opening condition has been met, the closing condition must also be met. There is no frequency stress curve acquisition step for the closing condition. Figure 7 The different colors on the right side of the middle indicate the magnitude of stress;

[0101] In the above steps, after extracting the stress cloud map, the maximum stress should be extracted, and the extracted maximum stress must be less than the yield strength of the material. In addition, the above steps introduce the stress conditions under different working conditions, which can better guide design engineers to optimize the design of the replacement window. The above working conditions can also represent the direct characterization parameters of the structural strength of the replacement window assembly.

[0102] In some preferred embodiments, step 103, analyzing the pop-up window tree structure table and the stress cloud map in combination with the target strength cloud map corresponding to different working condition boundary conditions to screen out parts and connection points to be optimized, includes the following steps:

[0103] Step 10300: Obtain target strength cloud maps corresponding to different working condition boundary conditions, and then find target stress values ​​corresponding to parts and connection points in the pop-up window tree structure table in the target strength cloud map;

[0104] Step 10301: Find the actual stress values ​​corresponding to the parts and connection points in the tree structure table in the pop-up window in the stress cloud diagram corresponding to the boundary conditions of different working conditions;

[0105] Step 10302: Compare the actual stress value and the target stress value corresponding to each working condition boundary condition;

[0106] Step 10303: If the actual stress values ​​under all working condition boundary conditions are less than the target stress values, then the bullet-replacement window assembly with the support and limit mechanism meets the requirements;

[0107] Step 10304: Otherwise, it is not satisfied, and the parts and connection points corresponding to the actual stress values ​​greater than or equal to the target stress values ​​are taken as the parts and connection points to be optimized.

[0108] The above actual stress values ​​and target stress values ​​both refer to the maximum stress. The reason for considering stress to represent structural strength is that excessive stress will damage the structure, and the smaller the stress, the less destructive it is. The bullet-changing window assembly is affected by external forces during use. Through the above steps, simulation analysis can be used to determine which working condition the bullet-changing window assembly does not meet, and which specific parts and connection points do not meet the requirements. Designers can then adjust the design parameters according to the situation to ensure that the bullet-changing window assembly meets the extreme working conditions that may be encountered.

[0109] In a second aspect, a bullet-changing window assembly strength analysis system with a support and limiting mechanism is provided, comprising:

[0110] The first module is used to establish mesh models of each part of the window replacement assembly in the vehicle coordinate system and connect each mesh model to form a finite element model;

[0111] The second module is used to obtain the connection point type according to the finite element model, and then create a pop-up window tree structure table about the finite element model in combination with the bom table;

[0112] The third module is used to analyze the finite element model under different working conditions and boundary conditions to obtain the stress cloud diagram of the corresponding working conditions;

[0113] The fourth module is used to analyze the target strength cloud map corresponding to different working conditions and boundary conditions according to the pop-up window tree structure table and stress cloud map to screen out the parts and connection points to be optimized.

[0114] Among the above, the functional implementation of each module in the above-mentioned bullet-changing window assembly strength analysis system with a support and limiting mechanism corresponds to the steps in the above-mentioned embodiment of the bullet-changing window assembly strength analysis method with a support and limiting mechanism, and their functions and implementation processes will not be repeated here one by one.

[0115] On the third aspect, an embodiment of the present application provides a bullet-replacement window assembly strength analysis device with a support and limiting mechanism. The bullet-replacement window assembly strength analysis device with a support and limiting mechanism can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0116] In an embodiment of the present application, a bullet-changing window assembly strength analysis device with a support and limiting mechanism may include a processor, a memory, a communication interface, and a communication bus.

[0117] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0118] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, used to interconnect components within the device for analyzing the strength of a bullet-replacement window assembly with a support and limit mechanism, as well as interfaces used to interconnect the device with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user devices can include displays, keyboards, etc.

[0119] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0120] The processor may be a general-purpose processor that can call a strength analysis program for a bullet-replacement window assembly with a support and limiting mechanism stored in a memory and execute the strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism provided in an embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the strength analysis program for a bullet-replacement window assembly with a support and limiting mechanism is called may refer to the various embodiments of the strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism of the present application, and will not be repeated here.

[0121] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0122] The computer-readable storage medium of the present application stores a strength analysis program for a bullet-replacement window assembly with a support and limiting mechanism, wherein when the strength analysis program for a bullet-replacement window assembly with a support and limiting mechanism is executed by a processor, the steps of the strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism as described above are implemented.

[0123] Among them, the method implemented when the strength analysis program of the bullet-changing window assembly with a support and limiting mechanism is executed can refer to the various embodiments of the strength analysis method of the bullet-changing window assembly with a support and limiting mechanism of the present application, and will not be repeated here.

[0124] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0125] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0126] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A strength analysis method for a bullet-replacement window assembly with a support and limiting mechanism, characterized in that: It includes: Establishing mesh models of various parts of the pop-up window replacement assembly in the vehicle coordinate system, and connecting various mesh models to form a finite element model; this step specifically includes: dividing the sheet metal parts and tube profile parts in the pop-up window replacement assembly into meshes by shell units, and establishing corresponding mesh models; dividing the rods and castings in the pop-up window replacement assembly into meshes by solid units, and establishing corresponding mesh models; the sheet metal parts include a pop-up window replacement top cover (1) and a roof cover (7) connected to the pop-up window replacement; the tube profile parts include a roof cover reinforcement beam (8) and a pop-up window replacement top cover reinforcement beam (2); the rods include torsion bars rod (6), a support and limiting mechanism (3); the casting includes a hinge mechanism (4), a lock mechanism (5); obtaining a bom table of the bullet-changing window assembly; defining the material of each part according to the bom table, and defining the material thickness of the part established by the shell unit; connecting the connection points between the parts by bolt connection through a rigid unit; connecting the connection points between the parts by welding connection through a common node of the shell unit; connecting the connection points between the parts by spot welding connection through a hexahedron unit HEXA and a connection unit RBE3, so as to form the finite element model; Obtaining the connection point type according to the finite element model, and then creating a pop-up window tree structure table about the finite element model in combination with the bom table; Analyzing the finite element model under different working condition boundary conditions to obtain stress cloud diagrams corresponding to the working conditions; According to the pop-up window tree structure table and stress cloud map, and in combination with the target strength cloud map corresponding to different working condition boundary conditions, analysis is performed to screen out the parts and connection points to be optimized.

2. The strength analysis method of the bullet-replacement window assembly with a support and limit mechanism according to claim 1, characterized in that: The connection point type is obtained according to the finite element model, and then a pop-up window tree structure table about the finite element model is created in combination with the bom table, including the following steps: The mesh model corresponding to each part is formed into a single component, and then named according to the project code, part number, material name, and material thickness to obtain the corresponding child node; Put all the connection points of the rigid elements into the same component, name it RBE2, and get the corresponding child nodes; According to the material thickness, each connection point connected by welding is set to a corresponding component, and then named according to the project number, pop-up window assembly code, welding material, and material thickness to obtain multiple corresponding child nodes; According to the number of welding layers, all connection points connected by spot welding are set to a component, and then named according to the project number, pop-up window assembly code, SPOT-layer number, and combined unit weld point model unit to obtain corresponding multiple child nodes; According to the number of welding layers, the welding core 3D unit used in spot welding is set to a component, and then named according to the project number, pop-up window assembly code, SPOT-number of layers, and ACM-SOLID to obtain the corresponding child node; The locking mechanism (5), the hinge mechanism (4), and the support and limiting mechanism (3) are each provided with an assembly, and then named according to the project code and the assembly code to obtain corresponding sub-nodes; Gather all the above child nodes to form a pop-up window tree structure table.

3. The strength analysis method of the bullet-changing window assembly with a support and limiting mechanism according to claim 1 is characterized in that: Analyzing the finite element model under different working condition boundary conditions to obtain stress cloud diagrams corresponding to the working conditions includes the following steps: When the bullet-changing window assembly is closed, the finite element model is subjected to a strength analysis of the mounting point and a strength analysis of the end of the torsion bar (6) to obtain corresponding stress cloud diagrams; When the bullet-changing window assembly is open, the finite element model is subjected to impact analysis and frequency sweep analysis to obtain the corresponding stress cloud diagram.

4. The strength analysis method of the bullet-changing window assembly with a support and limiting mechanism according to claim 3 is characterized in that: When the window assembly is closed, the finite element model is subjected to a strength analysis of the mounting point and a strength analysis of the end of the torsion bar (6) to obtain the corresponding stress cloud diagram, including the following steps: Adjust the pop-up window of the finite element model to the closed state, cancel the torsion bar (6) connection, apply the extracted node support reaction force to the hinge mechanism (4), and apply gravity to obtain the corresponding stress cloud diagram; The pop-up window of the finite element model is adjusted to the closed state, and the strength of the left hinge and the right hinge of the hinge mechanism (4) are analyzed respectively; the steps for the strength analysis of the left hinge are: full constraint of the fixed point, contact between the left end of the torsion bar (6) and the installation groove of the left hinge, and the right end of the torsion bar (6) grabbing the cross-sectional unit; constraining the main node of the rigid unit; releasing the Y-direction movement and rotation of the vehicle coordinate system according to the actual installation state of the torsion bar (6); applying the extraction torque to obtain the stress cloud map.

5. The strength analysis method of the bullet-changing window assembly with a support and limiting mechanism according to claim 4 is characterized in that: Obtaining the extracted nodal support reaction and torque includes the following steps: One end of the mesh model of the torsion bar (6) is constrained and fixed, and the forced displacement and torsion angle parameters of the torsion bar (6) from the design state to the closed state are applied to the other end to obtain the extracted node support reaction force and extracted torque.

6. The strength analysis method of a bullet-changing window assembly with a support and limiting mechanism according to claim 3, characterized in that: When the bullet-changing window assembly is open, the finite element model is subjected to impact analysis and frequency sweep analysis to obtain the corresponding stress contours, including the following steps: Adjust the finite element model's bullet-replacement window to its maximum opening angle, then apply the designed gravity acceleration in the X, Y, and Z directions of the vehicle coordinate system to obtain the stress cloud corresponding to the impact condition. The pop-up window of the finite element model is adjusted to the maximum opening angle, and then the hinge mounting hole of the hinge mechanism (4) and the mounting hole of the support limit mechanism are fully constrained. The designed acceleration excitation is loaded along the three directions of the vehicle coordinate system X, Y, and Z respectively, and the frequency is swept from 0 to 100 Hz to obtain the frequency stress curve and stress cloud map.

7. The strength analysis method of a bullet-replacement window assembly with a support and limit mechanism according to claim 1, characterized in that: According to the pop-up window tree structure table and stress cloud map, combined with the target strength cloud map corresponding to different working conditions and boundary conditions, analysis is performed to screen out parts and connection points to be optimized, including the following steps: Obtain the target strength cloud map corresponding to the boundary conditions of different working conditions, and then find the target stress values ​​corresponding to the parts and connection points in the pop-up window tree structure table in the target strength cloud map; Find the actual stress values ​​corresponding to the parts and connection points in the tree structure table in the pop-up window in the stress cloud diagram corresponding to the boundary conditions of different working conditions; Compare the actual stress value and target stress value corresponding to each working condition boundary condition; If the actual stress value under all working condition boundary conditions is less than the target stress value, the bullet-changing window assembly with the support and limit mechanism meets the requirements; Otherwise, it is not satisfied, and the parts and connection points corresponding to the actual stress values ​​greater than or equal to the target stress values ​​are taken as the parts and connection points to be optimized; The actual stress value and the target stress value are both maximum stress values.

8. A bullet-changing window assembly strength analysis system with a support and limiting mechanism, characterized in that: It includes: The first module is used to establish a grid model of each part of the pop-up window replacement assembly in the whole vehicle coordinate system, and connect each grid model to form a finite element model; this step specifically includes: dividing the sheet metal parts and tube profile parts in the pop-up window replacement assembly into grids by shell units to establish corresponding grid models; dividing the rods and castings in the pop-up window replacement assembly into grids by body units to establish corresponding grid models; the sheet metal parts include a pop-up window replacement top cover (1) and a roof cover (7) connected to the pop-up window replacement; the tube profile parts include a roof cover reinforcement beam (8) and a pop-up window replacement top cover reinforcement beam (2); the rods The parts include a torsion bar (6) and a support and limiting mechanism (3); the casting includes a hinge mechanism (4) and a lock mechanism (5); a bom table of the bullet-changing window assembly is obtained; the material of each part is defined according to the bom table, and the material thickness of the part established by the shell unit is defined; the connection points between the parts connected by bolts are connected by rigid units; the connection points between the parts connected by welding are connected by common nodes of the shell unit; the connection points between the parts connected by spot welding are connected by hexahedral units HEXA and connection units RBE3 to form the finite element model; The second module is used to obtain the connection point type according to the finite element model, and then create a pop-up window tree structure table about the finite element model in combination with the bom table; The third module is used to analyze the finite element model under different working condition boundary conditions to obtain a stress cloud diagram corresponding to the working condition; The fourth module is used to analyze the target strength cloud map corresponding to the pop-up window tree structure table and stress cloud map in combination with the target strength cloud map corresponding to different working conditions and boundary conditions to screen out the parts and connection points to be optimized.

Images