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An Assembly-Oriented Structural Topology Optimization Method

A topology optimization and area technology, applied in design optimization/simulation, constraint-based CAD, special data processing applications, etc., can solve problems such as small size, meeting requirements, missing contact edges, etc., and achieve discrete rate and gray rate indicators Low, ensure structural integrity, and reduce the effect of compliance convergence value

Active Publication Date: 2022-04-08
SICHUAN UNIV
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Problems solved by technology

[0003] At present, most of the topology optimization of the design model is to directly optimize the design model, without considering the assembly characteristics of the model, resulting in missing contact edges or too small size, it is difficult to ensure that the technical indicators after assembly meet the requirements, while giving topology optimization The model adds greater difficulty in the post-processing stage

Method used

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  • An Assembly-Oriented Structural Topology Optimization Method
  • An Assembly-Oriented Structural Topology Optimization Method
  • An Assembly-Oriented Structural Topology Optimization Method

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Embodiment Construction

[0025] This embodiment takes figure 2 The two-dimensional plane stress structure shown is used to illustrate an assembly-oriented structural topology optimization method provided in this embodiment. The design area of ​​the structure in the figure is 150×40 mm, and the grid calculation density is 150×40 mm. The left and right ends of the design area adopt full-plane fixed constraints, and the middle node at the top of the structure shown in the figure is subjected to a vertical downward load of load F=1. Such as figure 1 As shown, an assembly-oriented structural topology optimization method provided in this embodiment includes the following steps:

[0026] (1) Use the Canny operator to detect the edge of the design model, and extract the effective boundary line of the design model, such as image 3 As shown, the Canny operator first denoises the image through Gaussian smoothing denoising, then calculates the image gradient to obtain possible edges, then filters non-edge pix...

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Abstract

The invention discloses an assembly-oriented structural topology optimization method, which includes: performing edge detection on the design model to obtain the sideline of the design model, determining the assembly sideline according to the determined design model assembly, and forming a bias curve from the assembly sideline to the center of the design model A new optimization area, performing topology optimization on the optimization area. The present invention uses the Canny operator to detect the edge of the design model before optimizing the topology, retains a certain size boundary of the design model through equidistant offset, and ensures that it can be effectively assembled with other models, thereby ensuring that the overall performance after assembly is within the scope of use .

Description

technical field [0001] The invention belongs to the field of topology optimization, and in particular relates to an assembly-oriented structural topology optimization method. Background technique [0002] Topology optimization is an optimization method that determines the shape and connectivity of void positions through material distribution in a fixed design area and satisfies the design constraints, and realizes the optimal layout of materials and lightweight structures to achieve optimization. Compared with size optimization and shape optimization methods, topology optimization is one of the most promising structural optimization methods, with the flexibility to create and eliminate small cavities during optimization, so topology optimization has been extensively studied in the academic field, and Developed into many branches, proposed a variety of methods, such as density-based methods, evolutionary structure optimization (ESO) and level set methods. [0003] At present...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/04
CPCG06F30/20G06F2111/04
Inventor 徐雷张国锋任清川杨键
Owner SICHUAN UNIV
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