Topological optimization design method considering self-supporting constraints of additive manufacturing structure

A topology optimization and design method technology, applied in design optimization/simulation, comprehensive factory control, etc., can solve problems such as optimality of damaged structures, increased design difficulty, increased processing time and cost, etc.

Active Publication Date: 2020-07-17
CIVIL AVIATION UNIV OF CHINA
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  • Claims
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Problems solved by technology

The use of support structures not only increases the difficulty of design, but also increases the processing time and cost, and the process is difficult to remove in the later stage, which destroys the optimality of the structure

Method used

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  • Topological optimization design method considering self-supporting constraints of additive manufacturing structure
  • Topological optimization design method considering self-supporting constraints of additive manufacturing structure
  • Topological optimization design method considering self-supporting constraints of additive manufacturing structure

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Embodiment Construction

[0074] Such as figure 1 As shown, the topology optimization design method considering the self-supporting constraints of the additive manufacturing structure provided by the present invention includes the following steps in order:

[0075] 1) Establish an optimization model, define geometric models, loads and boundary conditions, define design variables, objective functions and constraints based on the SIMP method framework, and perform cell density, material property parameters, structural volume ratio constraints, structural self-supporting penalty functions, Optimize algorithm parameters to set;

[0076] Specific steps are as follows:

[0077] Based on the framework of the SIMP method, with the minimum structural flexibility as the optimization goal, the discretized unit relative density as the design variable, and the structural volume ratio constraint and the structural self-supporting constraint penalty function value as the constraint conditions, an optimization model ...

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Abstract

The invention discloses a topological optimization design method considering self-supporting constraints of an additive manufacturing structure, and belongs to the technical field of structural optimization design. Based on an SIMP method and a structure self-supporting mathematical model, the self-supporting characteristic of the structure is represented through a penalty function and serves as adisplay constraint condition, self-supporting constraint sensitivity filtering is adopted to promote evolution of the supporting structure, and the topological optimization design method consideringthe self-supporting constraint of the additive manufacturing structure is obtained. According to the method, structural self-supporting of a final topological optimization result is realized through progressive evolution of the supporting structure, and adding of the supporting structure through secondary design is avoided, so that the material cost is saved, and the design period is shortened. Besides, the method is completely suitable for continuum structure topology optimization, is high in flexibility and low in calculation cost, and can be implanted into an existing topology optimizationframework as an extended function.

Description

technical field [0001] The invention belongs to the related field of structural optimization design, and relates to a topology optimization design method considering the self-supporting constraints of additive manufacturing structures. Background technique [0002] Topology optimization is an advanced structural design method, which can find the optimal material layout under certain constraints by using numerical optimization techniques. Compared with traditional size optimization and shape optimization, the design space is greatly expanded, so that innovative and high-performance structural layouts can be designed. Since the concept of topology optimization was proposed in the late 1980s, topology optimization theory and methods have been widely concerned and developed rapidly. Typical topology optimization methods include variable density method, asymptotic method, homogenization method and so on. A variety of techniques have also been developed to eliminate numerical in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23
CPCY02P90/02
Inventor 邹君冯振宇解江陈琨张悦超柴崇博
Owner CIVIL AVIATION UNIV OF CHINA
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