Manufacturability Constrained Topology Optimization Method Based on Temperature Analog Connectivity

Abstract

The invention discloses a temperature-based topological optimization method for comparing manufacturability constraint of connectivity. The method aims at considering the connectivity constraint in the material additive manufacturing process into a topological optimization model so as to realize the one-time manufacturing of topological optimization structures. According to the method, high-thermal conductivity self-heating materials are virtually added at the openings and holes, thermal insulation materials are virtually added in the structural areas, the borders are set as heat dissipation borders, and the connectivity constraint of the structures is equivalent to that the maximum temperature value of the structures under a virtual temperature field is less than a constant. The physical significance of the constraint is clear, the mathematical expression form of the constraint is simple and the sensitivity information of the constraint can be solved, so that beneficial effect is brought to the solution on the basis of a gradient optimization algorithm. Through considering the connectivity constraint of the structures in the topological optimization design, the occurrence of inner enclosed openings and holes in the topological optimum structures can be effectively avoided; and when the material additive manufacturing process is adopted, one-time moulding can be carried out, so that secondary processing is avoided.

Description

technical field [0001] The invention relates to a manufacturability-constrained topology optimization method based on temperature analog connectivity in the additive manufacturing process. Involved patent classification number G06 Calculation; Calculation; Counting G06F Electrical digital data processing G06F17 / 00 Digital computing equipment or data processing equipment or data processing methods especially suitable for specific functions G06F17 / 50 Computer-aided design. Background technique [0002] refer to Figure 1~2 , Mechanical, aerospace and other structural innovation design stages, conceptual model design occupies an increasingly important position. Structural topology optimization technology has become an effective tool for the innovative design of conceptual models and has been successfully applied. Because traditional topology optimization does not consider the limitations of the preparation process, the obtained structural configuration is complex. Engineers o...

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Problems solved by technology

For the structure 2 with internal holes, since the support material or unmelted metal powder cannot be removed, secondary corrections or structural partition manufacturing are often required, which greatly increases the difficulty of the manufacturing process and increases the cost

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