Simulation optimization method for welding and fixing shielding cover and electronic equipment

Abstract

The application provides a simulation optimization method for a welded fixed shielding cover and an electronic device, and the method comprises the following steps: constructing a stiffness analysis model of the shielding cover; determining a critical force of the shielding cover according to the stiffness analysis model; applying the critical force to the stiffness analysis model and performing statics analysis to obtain a deformation cloud atlas of the shielding cover; determining a target deformation region in the deformation cloud atlas and a deformation value of the target deformation region; and optimizing a to-be-optimized region corresponding to the target deformation region on the shielding cover according to the deformation value of the target deformation region to obtain an optimized shielding cover. The application can obtain an optimization direction and conclusion without sample testing, the result is intuitive, the research and development efficiency and cost can be greatly reduced, and precise prediction and efficient improvement of the stiffness of the welded fixed shielding cover can be realized.

Description

Technical Field

[0001] This application relates to the field of component design technology, and more specifically, to a simulation optimization method for welding and fixing a shielding cover and an electronic device. Background Technology

[0002] Shielding covers are critical metal structural components on printed circuit boards (PCBs) used for electromagnetic compatibility (EMC) protection. They work by creating a Faraday cage effect, blocking external electromagnetic interference (EMI) from entering sensitive circuits or suppressing radiation from high-frequency components within the board. In highly integrated electronic products such as handheld smart terminals and industrial IoT devices, soldered fixed shielding covers are widely used due to their high assembly reliability and good sealing performance. However, during the assembly process, soldered fixed shielding covers are susceptible to elastic / plastic deformation under conditions such as mechanical pressing, module stacking, or screw fastening. This can lead to insufficient clearance between the shielding cover and the tallest components on the PCB, reduced shielding effectiveness, or even physical interference, becoming a key failure mode affecting product yield and reliability.

[0003] Existing methods for structural verification and stiffness optimization of shielding covers typically only address pluggable shielding covers and their welding strength, and cannot address welded fixed structures. Summary of the Invention

[0004] The purpose of this application is to provide a simulation optimization method and electronic device for welding and fixing shielding covers, in order to address the shortcomings of the prior art and solve the problem that the prior art cannot process welding and fixing structures.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, one embodiment of this application provides a simulation optimization method for welding and fixing a shielding cover, the method comprising: A stiffness analysis model for the shielding cover is constructed, the stiffness analysis model including: geometric structure, material property information and boundary condition information; Based on the stiffness analysis model, the critical force of the shielding cover is determined; The critical force is applied to the stiffness analysis model, and static analysis is performed to obtain the deformation cloud map of the shield. The regional layout of the deformation cloud map is the same as that of the shield. Determine the target deformation region and the deformation value of the target deformation region in the deformation cloud map; Based on the deformation value of the target deformation region, the corresponding area to be optimized on the shielding cover is optimized to obtain the optimized shielding cover.

[0006] In one possible implementation, optimizing the corresponding area to be optimized on the shielding cover based on the deformation value of the target deformation region to obtain an optimized shielding cover includes: Obtain the design requirements of the shielding cover, and determine the optimization target of the shielding cover based on the design requirements and the deformation values; Based on the optimization objective of the shielding cover, determine the target adjustment direction and the target adjustment gradient; According to the target adjustment direction and the target adjustment gradient, the target deformation region is optimized to the corresponding region to be optimized on the shielding cover to obtain the optimized shielding cover.

[0007] In one possible implementation, determining the target adjustment direction and target adjustment gradient based on the optimization objective of the shielding cover includes: According to multiple preset size adjustment gradients, the dimensions of the supporting components on the shielding cover are adjusted in multiple preset directions, and static analysis is performed to obtain multiple deformation cloud diagrams of the shielding cover after adjustment. Based on the deformation cloud map of the shield and the deformation cloud maps after each adjustment, determine the target adjustment direction; Based on the optimization objective, the target adjustment gradient is determined from the adjusted deformation cloud maps of each target adjustment direction.

[0008] In one possible implementation, determining the target adjustment direction based on the deformation cloud map of the shield and each adjusted deformation cloud map includes: If the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the widening direction is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the narrowing direction is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction.

[0009] In one possible implementation, determining the target deformation region in the deformation cloud map and the deformation value of the target deformation region includes: Extract the region containing the target color from the deformation cloud map to obtain the candidate deformation region; Determine the position of the candidate deformation area within the shielding cover, and based on the position of the candidate deformation area within the shielding cover, determine whether to use the candidate deformation area as the target deformation area; If so, obtain the deformation value of the target deformation area.

[0010] In one possible implementation, determining whether to include the candidate deformation region as the target deformation region based on its position within the shielding cover includes: If the candidate deformation area is located in the support component of the shield, then the candidate deformation area is taken as the target deformation area.

[0011] In one possible implementation, determining the critical force of the shielding based on the stiffness analysis model includes: Based on the boundary condition information, the force constraint information of the shield is determined. The force constraint information is used to indicate the inherent stiffness of the welded edge of the shield against warping and rotation when it is under pressure. The critical force of the shield is determined based on the force constraint information, the geometric structure, and the material property information.

[0012] In one possible implementation, determining the critical force of the shielding cover based on the force constraint information, the geometric structure, and the material property information includes: Obtain the failure deformation amount of the shielding cover; The critical force of the shield is calculated based on the force constraint information, the geometric structure, the material property information, and the failure deformation.

[0013] In one possible implementation, calculating the critical force of the shielding cover based on the force constraint information, the geometric structure, the material property information, and the failure deformation includes: The critical force of the shield is calculated based on the force constraint information, the thickness and short side length of the geometric structure, the elastic modulus of the material properties, and the failure deformation.

[0014] Secondly, another embodiment of this application provides a simulation optimization device for welding and fixing a shielding cover, the device comprising: A construction module is used to construct a stiffness analysis model of the shield, the stiffness analysis model including: geometric structure, material property information and boundary condition information; The first determining module is used to determine the critical force of the shielding cover based on the stiffness analysis model. The analysis module is used to apply the critical force to the stiffness analysis model and perform static analysis to obtain the deformation cloud map of the shield, wherein the regional layout of the deformation cloud map is the same as the regional layout of the shield. The second determining module is used to determine the target deformation region in the deformation cloud map and the deformation value of the target deformation region; The optimization module is used to optimize the corresponding area to be optimized on the shielding cover based on the deformation value of the target deformation area, so as to obtain the optimized shielding cover.

[0015] In one possible implementation, the optimization module is specifically used for: Obtain the design requirements of the shielding cover, and determine the optimization target of the shielding cover based on the design requirements and the deformation values; Based on the optimization objective of the shielding cover, determine the target adjustment direction and the target adjustment gradient; According to the target adjustment direction and the target adjustment gradient, the target deformation region is optimized to the corresponding region to be optimized on the shielding cover to obtain the optimized shielding cover.

[0016] In one possible implementation, the optimization module is specifically used for: According to multiple preset size adjustment gradients, the dimensions of the supporting components on the shielding cover are adjusted in multiple preset directions, and static analysis is performed to obtain multiple deformation cloud diagrams of the shielding cover after adjustment. Based on the deformation cloud map of the shield and the deformation cloud maps after each adjustment, determine the target adjustment direction; Based on the optimization objective, the target adjustment gradient is determined from the adjusted deformation cloud maps of each target adjustment direction.

[0017] In one possible implementation, the optimization module is specifically used for: If the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the widening direction is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the narrowing direction is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction.

[0018] In one possible implementation, the second determining module is specifically used for: Extract the region containing the target color from the deformation cloud map to obtain the candidate deformation region; Determine the position of the candidate deformation area within the shielding cover, and based on the position of the candidate deformation area within the shielding cover, determine whether to use the candidate deformation area as the target deformation area; If so, obtain the deformation value of the target deformation area.

[0019] In one possible implementation, the second determining module is specifically used for: If the candidate deformation area is located in the support component of the shield, then the candidate deformation area is taken as the target deformation area.

[0020] In one possible implementation, the first determining module is specifically used for: Based on the boundary condition information, the force constraint information of the shield is determined. The force constraint information is used to indicate the inherent stiffness of the welded edge of the shield against warping and rotation when it is under pressure. The critical force of the shield is determined based on the force constraint information, the geometric structure, and the material property information.

[0021] In one possible implementation, the first determining module is specifically used for: Obtain the failure deformation amount of the shielding cover; The critical force of the shield is calculated based on the force constraint information, the geometric structure, the material property information, and the failure deformation.

[0022] In one possible implementation, the first determining module is specifically used for: The critical force of the shield is calculated based on the force constraint information, the thickness and short side length of the geometric structure, the elastic modulus of the material properties, and the failure deformation.

[0023] Thirdly, another embodiment of this application provides an electronic device, including: a processor, a storage medium, and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of any of the methods described in the first aspect above.

[0024] Fourthly, another embodiment of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of any of the methods described in the first aspect above.

[0025] The beneficial effects of this application are as follows: By constructing a stiffness analysis model of the shielding cover, determining the critical force of the shielding cover based on the stiffness analysis model, applying the critical force to the stiffness analysis model, and performing static analysis, a deformation cloud map of the shielding cover is obtained. Through the deformation cloud map, the target deformation area and the deformation value of the target deformation area can be determined. Based on the deformation value of the target deformation area, the corresponding area to be optimized on the shielding cover is optimized to obtain the optimized shielding cover. The optimization direction and conclusion can be obtained without prototype testing, and the results are intuitive, which can greatly reduce R&D efficiency and cost, and achieve accurate prediction and efficient improvement of the stiffness of welded fixed shielding covers. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic flowchart illustrating a simulation optimization method for a welding and fixing shielding cover provided in an embodiment of this application; Figure 2 A schematic diagram of a shielding cover in the simulation optimization method for welding and fixing shielding covers provided in the embodiments of this application; Figure 3 A schematic diagram of mesh differentiation in the simulation optimization method for the welded fixed shielding cover provided in the embodiments of this application; Figure 4 A schematic diagram of deformation cloud map in the simulation optimization method of the welding fixed shielding cover provided in the embodiments of this application; Figure 5 A schematic flowchart illustrating the process of obtaining the optimized shielding cover in the simulation optimization method for welding and fixing shielding cover provided in the embodiments of this application; Figure 6 A flowchart illustrating the process of determining the target adjustment direction and target adjustment gradient in the simulation optimization method for the welding fixed shielding provided in the embodiments of this application; Figure 7 This is a flowchart illustrating the process of determining the target deformation region and its deformation value in the deformation cloud map in the simulation optimization method for the welding fixed shielding provided in this application embodiment. Figure 8 A flowchart illustrating the determination of the critical force of a welding and fixing shield in the simulation optimization method provided in this application embodiment; Figure 9A schematic diagram of a simulation optimization device for welding and fixing a shielding cover provided in an embodiment of this application; Figure 10 This is a schematic diagram of the electronic device structure provided in an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0029] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0031] Existing methods for structural verification and stiffness optimization of shielding covers typically only address pluggable shielding covers and their welding strength, and cannot address welded fixed structures.

[0032] Based on the aforementioned problems, this application proposes a simulation optimization method for welded fixed shielding covers. By constructing a stiffness analysis model of the shielding cover and determining its critical force, the method applies the critical force to the model and performs static analysis to obtain a deformation cloud map. This cloud map identifies the target deformation region and its deformation value. Based on the deformation value, the corresponding area to be optimized on the shielding cover is then optimized, resulting in an optimized shielding cover. This method allows for the determination of optimization direction and conclusions without the need for prototyping and testing, and provides intuitive results. It significantly reduces R&D efficiency and costs, enabling accurate prediction and efficient improvement of the stiffness of welded fixed shielding covers.

[0033] It can be understood that a welded fixed shield refers to a shield that is connected to the pads of a printed circuit board (PCB) through surface mount technology (SMT) reflow soldering, and whose bottom edge has a semi-rigid boundary condition of "displacement is constrained and rotation is subject to elastic resistance" when subjected to force.

[0034] By implementing the simulation optimization method for welded fixed shielding provided in the embodiments of this application, the simulation optimization of welded fixed shielding can be achieved, enabling accurate prediction and efficient improvement of the stiffness of welded fixed shielding.

[0035] The simulation optimization method for welding and fixing shielding provided in this application will be described in detail below with reference to several embodiments.

[0036] Figure 1 A flowchart illustrating the simulation optimization method for welding and fixing shielding provided in this application embodiment is shown below. Figure 1 As shown, the executing entity of this method can be any electronic device with processing capabilities, and the method includes: S101. Construct a stiffness analysis model for the shielding cover.

[0037] The stiffness analysis model includes: geometric structure, material property information, and boundary condition information.

[0038] Optionally, obtain the design drawings of the shielding cover and import its geometry into 3D CAD software to create a 3D solid model of the shielding cover based on the design drawings. The 3D CAD software can be SolidWorks, Creo, etc. The 3D solid model of the shielding cover includes its complete geometry, such as the top plane, side walls, ribs, supporting components, and bottom welded edges. The supporting components can be supporting beams.

[0039] Optionally, Figure 2This is a schematic diagram of a shielding cover structure in the simulation optimization method for welding and fixing shielding covers provided in the embodiments of this application, with reference to... Figure 2 As shown, the 3D solid model of the shield is imported into the Geometry Module of Ansys Workbench. The Geometry Module of Ansys Workbench reads and processes the 3D solid model of the shield, identifies the geometry within it, removes minor features that have little impact on stiffness analysis (such as chamfers and fillets), and classifies and names the components to obtain the stiffness analysis model.

[0040] For example, the length (a) * width (b) * height (c) of the shield can be: 46 * 34 * 1.7 mm; thickness T: 0.2 mm.

[0041] Optionally, material property information of the stiffness analysis model can be obtained.

[0042] For example, the stiffness analysis model is imported into the static analysis module of Ansys Workbench, and the material property information of the shield is obtained.

[0043] At the same time, an engineering material property database can be established in advance, storing the material property information of commonly used shielding materials in the engineering material property database for retrieval.

[0044] In one example, taking the shield material as C7701 nickel silver, the material properties include: tensile strength: 540~655MPa, with a median of 579.5MPa; yield strength: approximately 450MPa; elastic modulus: approximately 135GPa; and density: 8.7g / cm^3.

[0045] Optionally, Figure 3 This is a schematic diagram of mesh differentiation in the simulation optimization method for the welded fixed shielding cover provided in the embodiments of this application, referring to... Figure 3 As shown, the stiffness analysis model is meshed to obtain a stiffness analysis model with multiple meshes.

[0046] In one example, the initial stiffness analysis model was automatically meshed in Ansys Workbench with a mesh size of 0.5 mm and a total of 31,138 meshes.

[0047] Optionally, after obtaining material property information and mesh differentiation, the boundary condition information of the stiffness analysis model can be obtained.

[0048] For example, boundary condition information includes displacement constraints, friction, temperature, gravity, pressure, etc., which can be configured according to actual conditions.

[0049] In one example, taking a one-piece shield and only exploring ways to improve its stiffness, the boundary conditions include: a temperature of 20°C, pressure applied to the upper surface, fixed support on the welded surface, and the four welded edges at the bottom of the shield being fixed to the PCB board by reflow soldering.

[0050] S102. Determine the critical force of the shielding cover based on the stiffness analysis model.

[0051] Optionally, after obtaining the stiffness analysis model, since the applied pressure is difficult to measure experimentally, the theory of elastic thin plates is used to inversely calculate the critical force F of the shielding using the failure deformation of the shielding.

[0052] Among them, critical force refers to the theoretical pressure value that corresponds to the maximum deformation of the shield reaching the preset failure threshold under known material, geometry and boundary constraints.

[0053] In one example, a stress analysis can be performed on the stiffness analysis model, and the critical force F of the shield can be calculated by inversely using the failure deformation of the shield.

[0054] S103. Apply the critical force to the stiffness analysis model and perform static analysis to obtain the deformation cloud diagram of the shield.

[0055] Optionally, a critical force F is applied to the stiffness analysis model, and static analysis is performed in Ansys Workbench using the Static Structural module to obtain the deformation contour map of the shield.

[0056] Specifically, the solver in the statics analysis module reads the stiffness analysis model, material properties, and boundary conditions, establishes the overall stiffness matrix [K], and introduces the Fixed Support constraint of the bottom welding surface. The problem is transformed into solving the linear equation system [K]{U}={F}. The sparse matrix solver is used to numerically solve the equation system to obtain the displacement vector {U} of each node. The vertical (Z-direction) displacement component is extracted to generate the deformation cloud map of the shield.

[0057] The regional layout of the deformed cloud map is the same as that of the shielding cover.

[0058] For example, Figure 4 This is a schematic diagram of the deformation cloud map in the simulation optimization method for the welding and fixing shield provided in the embodiments of this application, with reference to... Figure 4 As shown, the deformation cloud map includes multiple colored areas, each of which indicates the deformation distribution and is accompanied by a corresponding deformation value.

[0059] S104. Determine the target deformation region and the deformation value of the target deformation region in the deformation cloud map.

[0060] Optionally, after obtaining the deformation cloud map, the target deformation region and the deformation value of the target deformation region can be extracted from the deformation cloud map.

[0061] The target deformation region is used to indicate the area to be optimized on the shield, and the deformation value of the target deformation region is used to control the degree of optimization of the area to be optimized.

[0062] S105. Based on the deformation value of the target deformation area, optimize the corresponding area to be optimized on the shielding cover to obtain the optimized shielding cover.

[0063] Optionally, the corresponding area to be optimized on the shielding cover is optimized according to the deformation value of the target deformation area to obtain the optimized shielding cover.

[0064] In one example, the optimization target can be determined based on the deformation value of the target deformation area, and the corresponding area to be optimized on the shielding cover can be optimized according to the optimization target to obtain the optimized shielding cover.

[0065] In another example, based on the deformation value of the target deformation area, the corresponding optimization strategy can be obtained from a variety of preset optimization strategies, and the corresponding area to be optimized on the shielding cover can be optimized to obtain the optimized shielding cover.

[0066] In this embodiment, a stiffness analysis model of the shielding cover is constructed, and the critical force of the shielding cover is determined based on the stiffness analysis model. The critical force is then applied to the stiffness analysis model, and static analysis is performed to obtain the deformation cloud map of the shielding cover. The target deformation region and the deformation value of the target deformation region can be determined through the deformation cloud map. Based on the deformation value of the target deformation region, the corresponding optimization region on the shielding cover is optimized to obtain the optimized shielding cover. The optimization direction and conclusion can be obtained without prototype testing, and the results are intuitive. This can greatly reduce R&D efficiency and cost, and achieve accurate prediction and efficient improvement of the stiffness of welded fixed shielding covers.

[0067] In one possible implementation, Figure 5 A flowchart illustrating the process of obtaining the optimized shielding cover in the simulation optimization method for welding and fixing the shielding cover provided in the embodiments of this application, with reference to... Figure 5 As shown, in step S105 above, based on the deformation value of the target deformation region, the corresponding area to be optimized on the shielding cover is optimized to obtain the optimized shielding cover, including: S501. Obtain the design requirements of the shielding cover, and determine the optimization target of the shielding cover based on the design requirements and deformation values.

[0068] Optionally, the design requirements of the shielding cover can be obtained, and the design requirements can be compared with the deformation values ​​to obtain the optimization target of the shielding cover.

[0069] In one example, the maximum deformation value in the design requirements is compared with the deformation value to obtain the optimization target of the shield. For example, the optimization target can be a reduction of 10%.

[0070] S502. Based on the optimization objective of the shielding cover, determine the target adjustment direction and target adjustment gradient.

[0071] Optionally, after obtaining the optimization objective, the direction of objective adjustment and the objective adjustment gradient can be determined based on the optimization objective.

[0072] In one example, the target adjustment direction and target adjustment gradient can be calculated based on the current size of the shield and by optimizing the target.

[0073] Among them, the target adjustment direction refers to the optimization direction of the shield, and the target adjustment gradient refers to the optimization size of the shield.

[0074] S503. According to the target adjustment direction and target adjustment gradient, optimize the area to be optimized on the shielding cover corresponding to the target deformation area to obtain the optimized shielding cover.

[0075] Optionally, after obtaining the target adjustment direction and the target adjustment gradient, the corresponding area to be optimized on the shielding cover can be optimized according to the target adjustment direction and the target adjustment gradient to obtain the optimized shielding cover.

[0076] In one possible implementation, Figure 6 A flowchart illustrating the process of determining the target adjustment direction and target adjustment gradient in the simulation optimization method for welding and fixing shielding provided in this application embodiment, referring to... Figure 6 As shown, in S502 above, the target adjustment direction and target adjustment gradient are determined according to the optimization objective of the shielding cover, including: S601. Adjust the dimensions of the supporting components on the shielding cover according to multiple preset size adjustment gradients in multiple preset directions, and perform static analysis to obtain multiple deformation cloud diagrams of the shielding cover after adjustment.

[0077] Optionally, the gradient is adjusted according to multiple preset dimensions and combined in multiple preset directions. The dimensions of the supporting components on the shield are adjusted respectively. Static analysis is performed in Ansys Workbench by the StaticStructural module to obtain multiple adjusted deformation cloud diagrams corresponding to the shield.

[0078] The regional layout of each adjusted deformed cloud map is the same as that of the shielding cover.

[0079] For example, the preset multiple size adjustment gradients may include 0.5mm and 1mm, and the preset multiple directions may include an increasing direction and a narrowing direction.

[0080] In one example, the supporting components on the shielding cover were dimensionally adjusted by increasing and decreasing the dimensions by 0.5mm and 1mm, respectively, and static analysis was performed to obtain multiple deformation contour maps of the shielding cover after the adjustments. The deformation amounts of each adjusted deformation contour map are 0.11379mm, 0.12023mm, 0.098559mm, and 0.089751mm, respectively.

[0081] S602. Determine the target adjustment direction based on the deformation cloud map of the shield and the deformation cloud maps after each adjustment.

[0082] Optionally, the deformation cloud map of the shield can be compared with each adjusted deformation cloud map to determine the target adjustment direction.

[0083] S603. Based on the optimization objective, determine the target adjustment gradient from the adjusted deformation cloud maps of each target adjustment direction.

[0084] Optionally, after obtaining the target adjustment direction, based on the optimization target, the adjusted deformation cloud map with the largest deformation amount is determined from each adjusted deformation cloud map belonging to the target adjustment direction, and the size adjustment gradient of the adjusted deformation cloud map with the largest deformation amount is used as the target adjustment gradient.

[0085] For example, after determining that the target adjustment direction is the narrowing direction, the target adjustment gradient is determined to be 1mm from each adjusted deformation cloud map in the narrowing direction.

[0086] By adjusting the gradient according to multiple preset dimensions, the dimensions of the supporting components on the shielding cover are adjusted in multiple preset directions. Static analysis is then performed to obtain multiple deformation cloud maps of the shielding cover after adjustment. Based on the deformation cloud maps of the shielding cover and each adjusted deformation cloud map, the target adjustment direction is determined. Thus, based on the optimization target, the target adjustment gradient is determined from each adjusted deformation cloud map of the target adjustment direction. By constructing a control experimental group, the optimization process can possess the scientific attributes of repeatability, attributability, and falsification, thereby avoiding blind optimization that leads to a decrease in stiffness. At the same time, using the monotonicity of deformation with respect to dimensional disturbance as a criterion for structural optimization direction can also improve the optimization effect.

[0087] In one possible implementation, the target adjustment direction is determined in step S602 based on the deformation cloud map of the shield and each adjusted deformation cloud map, including: If the deformation amount of the target deformation region in each gradient in the widening direction in each adjusted deformation cloud map is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each gradient in the narrowing direction in each adjusted deformation cloud map is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction.

[0088] It is understandable that, based on the principle of minimum load path, forces in a structure will be transmitted from the loading point to the constraint point along the shortest path with the best rigidity. Although, based on the minimum load path theory, the initial direction tends to narrow the reinforcement to guide stress diversion, the embodiments in this application do not consider simple unidirectional narrowing. This is because excessive narrowing will cause a sudden drop in the local load-bearing section, leading to new stress concentration failures.

[0089] Therefore, based on the design theory of the shield, the "two-way approximation method" can be used for judgment. If the deformation amount of the target deformation region in each gradient in the widening direction in each adjusted deformation cloud map is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each gradient in the narrowing direction in each adjusted deformation cloud map is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction. This can achieve a dynamic balance between "stress diversion" and "local pressure bearing", thereby improving the optimization effect.

[0090] In one possible implementation, Figure 7 This is a flowchart illustrating the process of determining the target deformation region and its deformation value in the deformation cloud map during the simulation optimization method for the welded fixed shielding cover provided in this application embodiment. (Refer to...) Figure 7 As shown, in S104 above, determining the target deformation region and the deformation value of the target deformation region in the deformation cloud map includes: S701. Extract the region containing the target color in the deformation cloud map to obtain the candidate deformation region.

[0091] Optionally, in Ansys Workbench, by adjusting the legend threshold, the region containing the target color in the deformation cloud map can be extracted to obtain the candidate deformation region.

[0092] For example, in Ansys Workbench, the maximum and minimum values ​​are displayed according to the pre-configured legend, the display range is adjusted, and the candidate deformation area is extracted.

[0093] In one example, continue to refer to Figure 4 As shown, the region to be deformed can be Figure 4 The area in the middle is red.

[0094] S702. Determine the position of the candidate deformation area within the shielding cover, and based on the position of the candidate deformation area within the shielding cover, determine whether to use the candidate deformation area as the target deformation area.

[0095] Optionally, the coordinates of the area to be deformed are compared with the geometry of the shielding cover to determine the position of the area to be deformed within the shielding cover. The position of the area to be deformed within the shielding cover indicates the component to which the area to be deformed belongs within the shielding cover.

[0096] Optionally, the position of the selected deformation area in the shielding cover is determined. If the position of the selected deformation area in the shielding cover is a preset position where deformation may occur, then the selected deformation area is determined as the target deformation area. Otherwise, S101-S105 are executed again.

[0097] In one example, continue to refer to Figure 4 As shown, the candidate deformation area can be selected as the target deformation area by making a judgment.

[0098] S703. If so, obtain the deformation value of the target deformation area.

[0099] Optionally, if the area to be deformed is taken as the target deformation area, the deformation value of the target deformation area is obtained.

[0100] In one example, continue to refer to Figure 4 As shown, the deformation value of the target deformation area can be obtained as 0.10645.

[0101] In one possible implementation, determining whether to use the candidate deformation region as the target deformation region in step S702, based on the position of the candidate deformation region within the shielding cover, includes: If the area to be deformed is located in the supporting component of the shield, then the area to be deformed is taken as the target deformation area.

[0102] Optionally, if the area to be deformed is located in the supporting component of the shield, the area to be deformed is taken as the target deformation area, thereby ensuring that the optimization measures directly target the weak link and improve the optimization effect.

[0103] In one possible implementation, Figure 8 A flowchart illustrating the determination of the critical force of the welding and fixing shield in the simulation optimization method provided in this application embodiment, referring to... Figure 8 As shown, in S102 above, the critical force of the shield is determined according to the stiffness analysis model, including: S801. Determine the force constraint information of the shielding cover based on the boundary condition information.

[0104] It is understandable that, according to the theory of elastic thin plates, when the edge can rotate freely, the force constraint type is simply supported on four sides, and when the edge cannot rotate completely, the force constraint type is fixed on four sides.

[0105] Optionally, based on the physical characteristics in the boundary condition information, the welding fixation state is determined, and the welding fixation state is compared with the four-sided simply supported type and four-sided fixed supported type in the elastic thin plate theory to obtain the force constraint information of the shield.

[0106] In one example, if the welded fixed state satisfies the four-sided simply supported type, then the force constraint information is determined to be a deflection coefficient k of 0.118.

[0107] In another example, if the welded fixed state satisfies the four-sided fixed support type, then the force constraint information is determined to be a deflection coefficient k of 0.061.

[0108] In another example, if the welding fixation state does not satisfy either the four-sided fixed support type or the four-sided simply supported type, the mean of the deflection coefficient under the four-sided simply supported type and the four-sided fixed support type can be calculated, and the result is rounded to the fixed support side as the force constraint information of the shield, which is 0.08.

[0109] The force constraint information indicates the inherent stiffness of the welded edges of the shielding cover to resist warping and rotation under pressure. Specifically, the force constraint information includes the deflection coefficient.

[0110] S802. Determine the critical force of the shielding cover based on the force constraint information, geometric structure, and material property information.

[0111] Optionally, after obtaining the force constraint information, the critical force of the shield can be calculated based on the force constraint information, geometric structure, and material property information.

[0112] In one possible implementation, the critical force of the shielding cover is determined in step S802 based on the force constraint information, geometric structure, and material property information, including: The failure deformation of the shield is obtained, and the critical force of the shield is calculated based on the force constraint information, geometric structure, material property information, and failure deformation.

[0113] Optionally, the failure deformation of the shielding cover can be obtained. The failure deformation refers to the vertical clearance distance between the inner wall (top surface or lower surface of the rib) of the shielding cover and the top surface of the highest device (such as a chip or capacitor) on the PCB board.

[0114] Optionally, the critical force of the shield can be calculated based on the failure deformation, geometry, material properties, and failure deformation.

[0115] In one possible implementation, the above steps calculate the critical force of the shielding based on the force constraint information, geometric structure, material property information, and failure deformation, including: The critical force of the shield is calculated based on the force constraint information, the thickness and short side length in the geometric structure, the elastic modulus and failure deformation in the material properties.

[0116] For example, the critical force F of the shield can be calculated with reference to the following formula: F = w max * E * T 3 / k * l min 2 in, w max This represents the amount of deformation at failure. E For elastic modulus, T For thickness, k The deflection coefficient, l min This is the length of the shorter side.

[0117] In one example, the critical force F of the shield can be calculated to be 5.25 N.

[0118] Based on the same inventive concept, this application also provides a simulation optimization device for a welded and fixed shielding cover, which corresponds to the simulation optimization method for welding and fixing shielding covers. Since the principle of the device in this application is similar to the simulation optimization method for welding and fixing shielding covers described above, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0119] Reference Figure 9 As shown, Figure 9 This is a schematic diagram of a simulation optimization device for welding and fixing a shielding cover provided in an embodiment of this application. The device includes: a construction module 901, a first determination module 902, an analysis module 903, a second determination module 904, and an optimization module 905. Module 901 is used to construct the stiffness analysis model of the shield. The stiffness analysis model includes: geometric structure, material property information and boundary condition information. The first determining module 902 is used to determine the critical force of the shielding cover based on the stiffness analysis model; Analysis module 903 is used to apply critical force to the stiffness analysis model and perform static analysis to obtain the deformation cloud map of the shield. The area layout of the deformation cloud map is the same as that of the shield. The second determining module 904 is used to determine the target deformation area in the deformation cloud map and the deformation value of the target deformation area. The optimization module 905 is used to optimize the area to be optimized on the shielding cover corresponding to the target deformation area based on the deformation value of the target deformation area, so as to obtain the optimized shielding cover.

[0120] In one possible implementation, optimization module 905 is specifically used for: Obtain the design requirements for the shielding cover, and determine the optimization target of the shielding cover based on the design requirements and deformation values; Based on the optimization objectives of the shielding cover, determine the direction and gradient of the target adjustment; Based on the target adjustment direction and target adjustment gradient, the corresponding area to be optimized on the shielding cover is optimized to obtain the optimized shielding cover.

[0121] In one possible implementation, optimization module 905 is specifically used for: According to multiple preset size adjustment gradients, the dimensions of the supporting components on the shielding cover are adjusted in multiple preset directions, and static analysis is performed to obtain multiple deformation cloud diagrams of the shielding cover after adjustment. Based on the deformation cloud map of the shield and the deformation cloud maps after each adjustment, determine the target adjustment direction; Based on the optimization objective, the target adjustment gradient is determined from the adjusted deformation cloud maps of each target adjustment direction.

[0122] In one possible implementation, optimization module 905 is specifically used for: If the deformation amount of the target deformation region in each gradient in the widening direction in each adjusted deformation cloud map is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each gradient in the narrowing direction in each adjusted deformation cloud map is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction.

[0123] In one possible implementation, the second determining module 904 is specifically used for: Extract the region containing the target color from the deformation cloud map to obtain the candidate deformation region; Determine the location of the candidate deformation area within the shielding cover, and based on the location of the candidate deformation area within the shielding cover, determine whether to use the candidate deformation area as the target deformation area. If so, obtain the deformation value of the target deformation area.

[0124] In one possible implementation, the second determining module 904 is specifically used for: If the area to be deformed is located in the supporting component of the shield, then the area to be deformed is taken as the target deformation area.

[0125] In one possible implementation, the first determining module 902 is specifically used for: Based on the boundary condition information, the force constraint information of the shield is determined. The force constraint information is used to indicate the intrinsic stiffness of the welded edge of the shield against warping and rotation when under pressure. The critical force of the shield is determined based on the force constraint information, geometric structure, and material property information.

[0126] In one possible implementation, the first determining module 902 is specifically used for: Obtain the failure deformation amount of the shielding cover; The critical force of the shield is calculated based on the force constraint information, geometric structure, material property information, and failure deformation.

[0127] In one possible implementation, the first determining module 902 is specifically used for: The critical force of the shield is calculated based on the force constraint information, the thickness and short side length in the geometric structure, the elastic modulus and failure deformation in the material properties.

[0128] The processing flow of each module in the device and the interaction flow between each module can be referred to the relevant descriptions in the above method embodiments, and will not be detailed here.

[0129] This application also provides an electronic device, such as... Figure 10 As shown, Figure 10The schematic diagram of the electronic device structure provided in this application embodiment includes: a processor 1001 and a memory 1002, and optionally, a bus 1003. The memory 1002 stores machine-readable instructions executable by the processor 1001. When the electronic device is running, the processor 1001 and the memory 1002 communicate via the bus 1003. The processor 1001 executes the machine-readable instructions to perform the steps of the simulation optimization method for welding and fixing the shielding cover described above.

[0130] This application also provides a computer-readable storage medium storing a computer program, which, when run by a processor, executes the steps of the above-described simulation optimization method for welding and fixing a shielding cover.

[0131] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0132] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0133] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A simulation optimization method for welding and fixing a shielding cover, characterized in that, include: A stiffness analysis model for the shielding cover is constructed, the stiffness analysis model including: geometric structure, material property information and boundary condition information; Based on the stiffness analysis model, the critical force of the shielding cover is determined; The critical force is applied to the stiffness analysis model, and static analysis is performed to obtain the deformation cloud map of the shield. The regional layout of the deformation cloud map is the same as that of the shield. Determine the target deformation region and the deformation value of the target deformation region in the deformation cloud map; Based on the deformation value of the target deformation region, the corresponding area to be optimized on the shielding cover is optimized to obtain the optimized shielding cover.

2. The simulation optimization method for welding and fixing the shielding cover according to claim 1, characterized in that, The step of optimizing the corresponding area to be optimized on the shielding cover based on the deformation value of the target deformation area to obtain the optimized shielding cover includes: Obtain the design requirements of the shielding cover, and determine the optimization target of the shielding cover based on the design requirements and the deformation values; Based on the optimization objective of the shielding cover, determine the target adjustment direction and the target adjustment gradient; According to the target adjustment direction and the target adjustment gradient, the target deformation region is optimized to the corresponding region to be optimized on the shielding cover to obtain the optimized shielding cover.

3. The simulation optimization method for welding and fixing the shielding cover according to claim 2, characterized in that, The step of determining the target adjustment direction and target adjustment gradient based on the optimization target of the shielding cover includes: According to multiple preset size adjustment gradients, the dimensions of the supporting components on the shielding cover are adjusted in multiple preset directions, and static analysis is performed to obtain multiple deformation cloud diagrams of the shielding cover after adjustment. Based on the deformation cloud map of the shield and the deformation cloud maps after each adjustment, determine the target adjustment direction; Based on the optimization objective, the target adjustment gradient is determined from the adjusted deformation cloud maps of each target adjustment direction.

4. The simulation optimization method for welding and fixing the shielding cover according to claim 3, characterized in that, The step of determining the target adjustment direction based on the deformation cloud map of the shielding cover and each adjusted deformation cloud map includes: If the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the widening direction is greater than the deformation amount of the target deformation region in the deformation cloud map of the shield, and the deformation amount of the target deformation region in each of the adjusted deformation cloud maps in the narrowing direction is less than the deformation amount of the target deformation region in the deformation cloud map of the shield, then the target adjustment direction is determined to be the narrowing direction.

5. The simulation optimization method for welding and fixing the shielding cover according to claim 1, characterized in that, Determining the target deformation region in the deformation cloud map and the deformation value of the target deformation region includes: Extract the region containing the target color from the deformation cloud map to obtain the candidate deformation region; Determine the position of the candidate deformation area within the shielding cover, and based on the position of the candidate deformation area within the shielding cover, determine whether to use the candidate deformation area as the target deformation area; If so, obtain the deformation value of the target deformation area.

6. The simulation optimization method for welding and fixing the shielding cover according to claim 5, characterized in that, The step of determining whether to use the candidate deformation region as the target deformation region based on its position within the shielding cover includes: If the candidate deformation area is located in the support component of the shield, then the candidate deformation area is taken as the target deformation area.

7. The simulation optimization method for welding and fixing the shielding cover according to claim 1, characterized in that, Determining the critical force of the shielding cover based on the stiffness analysis model includes: Based on the boundary condition information, the force constraint information of the shield is determined. The force constraint information is used to indicate the inherent stiffness of the welded edge of the shield against warping and rotation when it is under pressure. The critical force of the shield is determined based on the force constraint information, the geometric structure, and the material property information.

8. The simulation optimization method for welding and fixing the shielding cover according to claim 7, characterized in that, Determining the critical force of the shielding cover based on the force constraint information, the geometric structure, and the material property information includes: Obtain the failure deformation amount of the shielding cover; The critical force of the shield is calculated based on the force constraint information, the geometric structure, the material property information, and the failure deformation.

9. The simulation optimization method for welding and fixing the shielding cover according to claim 8, characterized in that, The step of calculating the critical force of the shielding cover based on the force constraint information, the geometric structure, the material property information, and the failure deformation includes: The critical force of the shield is calculated based on the force constraint information, the thickness and short side length of the geometric structure, the elastic modulus of the material properties, and the failure deformation.

10. An electronic device, characterized in that, include: The device includes a processor and a memory, the memory storing machine-readable instructions executable by the processor, which, when the electronic device is running, are executed by the processor to perform the steps of the simulation optimization method for welding a fixed shield as described in any one of claims 1 to 9.

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