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CN-121997497-A - Shear plate design method based on generation topology and related equipment

CN121997497ACN 121997497 ACN121997497 ACN 121997497ACN-121997497-A

Abstract

The invention discloses a shearing plate design method based on a generated topology and related equipment, and relates to the field of metal plate shearing. The method comprises the steps of obtaining design conditions, encoding the design conditions into condition vectors, inputting the condition vectors into a generating model to generate candidate topological configurations, conducting geometric reconstruction and gridding processing on the candidate topological configurations, calculating energy consumption evaluation indexes such as hysteresis curve area, equivalent damping ratio and stiffness degradation rate based on cyclic load finite element analysis, comparing the energy consumption evaluation indexes with preset criteria, determining a target shear plate structure by combining a rollback optimization mechanism, constructing an additive manufacturing printing path based on the target structure, conducting self-adaptive adjustment on the printing path and technological parameters through thermal process prediction, outputting manufacturing files meeting temperature gradient constraint for forming manufacturing, and achieving rapid generation of the shear plate topological structure, closed loop optimization of energy consumption performance and cooperative control of a manufacturing process.

Inventors

  • LIU YE
  • Wang Binxuan

Assignees

  • 四川大学

Dates

Publication Date
20260508
Application Date
20260206

Claims (10)

  1. 1. A method of designing a shear-plate based on a generative topology, comprising: Acquiring a shear plate design condition based on a generated topology, wherein the design condition at least comprises a geometric dimension parameter, a boundary connection parameter, a cyclic load spectrum parameter, a volume upper limit constraint and an additive manufacturing minimum characteristic dimension constraint; Encoding the design conditions into condition vectors based on the design conditions, inputting the condition vectors into a generating model, and generating at least one candidate topological configuration; performing geometric reconstruction and meshing processing on each candidate topological structure, and performing cyclic loading finite element analysis to obtain an energy consumption evaluation index set, wherein the energy consumption evaluation index set at least comprises a hysteresis curve area Equivalent damping ratio Rate of deterioration of stiffness of cutting line ; Comparing the energy consumption evaluation index set with preset energy consumption criteria, wherein the preset energy consumption criteria at least comprise 、 、 Regenerating a topological configuration and/or energy consumption evaluation index set when the preset energy consumption criterion is not met until the preset energy consumption criterion is met, so as to obtain a target shear plate structure; Constructing an additive manufacturing printing path based on the target shear plate structure, and obtaining the maximum temperature gradient of the printing process based on a thermal process prediction model ; Will be And a preset temperature gradient threshold value Comparison when At the same time, at least one process parameter and/or path parameter is adjusted and recalculated Up to When (1) And outputting a printing path and a manufacturing file which meet the temperature gradient constraint and are used for forming and manufacturing the target shear plate structure.
  2. 2. The generated topology-based shear panel design method of claim 1, wherein the generated model generates an countermeasure network cGAN for a condition, the condition vector including at least the geometry parameters, the cyclic load spectrum parameters, and the upper volume limit constraint.
  3. 3. The generated topology-based shear-plate design method of claim 2, wherein the cGAN discriminant is a multi-scale discriminant to simultaneously constrain global connectivity structures and local detail features of candidate topologies.
  4. 4. The method for designing the shear-plate based on the generative topology according to claim 1, wherein the geometric reconstruction and gridding processing comprises the steps of performing region growing segmentation on a binary pixel map of a candidate topological configuration, extracting boundaries by adopting an edge detection operator, performing curve fitting on the boundaries to obtain a closed vector contour, and generating a finite element grid based on the closed vector contour, wherein the edge detection operator is a Sobel operator, and the curve fitting is Bezier curve fitting.
  5. 5. The method of generating topology based shear plate design of claim 1, further comprising, after obtaining said finite element mesh, applying a maximum equivalent stress under cyclic loading Performing shape optimization on the closed vector contour with a minimization goal to obtain an optimized structure for the cyclic loading finite element analysis.
  6. 6. The generated topology-based shear-plate design method of claim 1, wherein the 、 、 Is determined using a relative baseline threshold value that is determined based on a corresponding energy consumption evaluation index of the initially designed shear plate.
  7. 7. The generated topology-based shear-plate design method of claim 1, wherein the Is a threshold value within a preset interval, and when The adjustment includes at least one of reducing energy density, increasing scanning interval, adjusting scanning order to print a region with a lower predicted temperature and a region with a higher predicted temperature, and setting interlayer residence time when And outputting the printing path according to the shortest path of the same layer.
  8. 8. A generated topology-based shear-plate design system for implementing the generated topology-based shear-plate design method of claims 1-7, comprising: The system comprises a design condition acquisition unit, a processing unit and a processing unit, wherein the design condition acquisition unit is used for acquiring a shear plate design condition based on a generated topology, and the design condition at least comprises a geometric dimension parameter, a boundary connection parameter, a cyclic load spectrum parameter, a volume upper limit constraint and an additive manufacturing minimum characteristic dimension constraint; a condition encoding unit configured to encode the design condition into a condition vector; A generating topology generating unit for inputting the condition vector into a generating model to generate at least one candidate topology configuration; The geometric reconstruction and gridding unit is used for performing geometric reconstruction and gridding processing on the candidate topological configuration to obtain a structural model for finite element analysis, wherein the geometric reconstruction and gridding processing at least comprises the steps of carrying out region segmentation, boundary extraction and curve fitting on pixel characterization of the candidate topological configuration to form a closed vector outline, and generating a finite element grid based on the closed vector outline; the simulation evaluation unit is used for executing cyclic loading finite element analysis based on the structural model, and calculating to obtain an energy consumption evaluation index set, wherein the energy consumption evaluation index set at least comprises a hysteresis curve area A, an equivalent damping ratio ζe and a secant stiffness degradation rate rd; A rollback control unit for comparing the energy consumption evaluation index set with a preset energy consumption criterion, wherein the preset energy consumption criterion at least comprises 、 、 When the comparison result is that the preset energy consumption criterion is not met, controlling the generating topology generation unit to regenerate the candidate topology configuration and/or controlling the geometric reconstruction and meshing unit and the cyclic energy consumption simulation evaluation unit to reevaluate the updated candidate topology configuration until the preset energy consumption criterion is met to determine a target shear plate structure; A print path construction unit for constructing an additive manufacturing print path based on the target shear plate structure and generating a manufacturing file; The thermal process prediction unit is used for performing thermal process prediction on the printing process based on the printing path and preset process parameters to obtain the maximum temperature gradient Gmax of the printing process; An adaptive adjustment unit for adjusting And a preset temperature gradient threshold value Comparison when At the same time, at least one process parameter and/or path parameter is adjusted and recalculated Up to When (1) And outputting a printing path and a manufacturing file which meet the temperature gradient constraint and are used for forming and manufacturing the target shear plate structure.
  9. 9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the generated topology-based clipboard design method of any of claims 1-7 when the program is executed by the processor.
  10. 10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the method of generating topology based clipboard design of any of claims 1 to 7.

Description

Shear plate design method based on generation topology and related equipment Technical Field The invention relates to the field of metal plate shearing, in particular to a shearing plate design method based on a generated topology and related equipment. Background The topology optimization technology aims at optimizing and configuring the material distribution in the structure under given design space, load working condition and constraint condition so as to realize the design targets of light structure, high strength, high performance and the like, and is widely applied to the fields of machinery, construction, aerospace and the like. The existing topology optimization method mainly comprises a structure topology optimization method based on a density method and a structure topology optimization method based on an evolution algorithm. The method generally approaches the optimal structure form by introducing a large number of design variables and adopting an iterative solution mode, and can obtain an optimal result in a theoretical sense, but the problems of large calculation scale, multiple iteration times and long solution period commonly exist in practical application, so that engineering application requirements in a batched and rapid design scene are difficult to meet. Meanwhile, the structural form obtained by traditional topological optimization often has the problems of fuzzy boundary, more local tiny holes and the like, and geometric reconstruction and process correction are required to be carried out at the subsequent stage, so that the design period is increased, and the structural performance is possibly reduced. With the development of additive manufacturing technology, the manufacturing mode of layer-by-layer forming improves the manufacturing feasibility of the complex configuration structure to a certain extent. However, the prior art has the defects that on one hand, an effective cooperative mechanism is lacking between a topological optimization result and additive manufacturing process parameters, and structural performance and forming quality are difficult to be considered, and on the other hand, in the process of designing a member bearing cyclic load aiming at a shear plate and the like, the conventional topological optimization method generally takes rigidity or quality as a main optimization target, and lacks comprehensive constraint on factors such as energy consumption performance, fatigue performance, thermal influence in the forming process and the like. Disclosure of Invention The invention aims to provide a shearing plate design method based on a generation topology and related equipment, which solve the problems that how to realize the rapid generation of a topological structure and realize cooperative optimization with an additive manufacturing process under the premise of ensuring the cyclic energy consumption performance of the shearing plate. The invention is realized by the following technical scheme: A shear-plate design method based on a generative topology, comprising: Acquiring a shear plate design condition based on a generated topology, wherein the design condition at least comprises a geometric dimension parameter, a boundary connection parameter, a cyclic load spectrum parameter, a volume upper limit constraint and an additive manufacturing minimum characteristic dimension constraint; Encoding the design conditions into condition vectors based on the design conditions, inputting the condition vectors into a generating model, and generating at least one candidate topological configuration; performing geometric reconstruction and meshing processing on each candidate topological structure, and performing cyclic loading finite element analysis to obtain an energy consumption evaluation index set, wherein the energy consumption evaluation index set at least comprises a hysteresis curve area Equivalent damping ratioRate of deterioration of stiffness of cutting line; Comparing the energy consumption evaluation index set with preset energy consumption criteria, wherein the preset energy consumption criteria at least comprise、、Regenerating a topological configuration and/or energy consumption evaluation index set when the preset energy consumption criterion is not met until the preset energy consumption criterion is met, so as to obtain a target shear plate structure; Constructing an additive manufacturing printing path based on the target shear plate structure, and obtaining the maximum temperature gradient of the printing process based on a thermal process prediction model ; Will beAnd a preset temperature gradient threshold valueComparison whenAt the same time, at least one process parameter and/or path parameter is adjusted and recalculatedUp toWhen (1)And outputting a printing path and a manufacturing file which meet the temperature gradient constraint and are used for forming and manufacturing the target shear plate structure. Preferably, the generative model generat