• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (15): 346-357.doi: 10.3901/JME.2024.15.346

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Topology Optimization Design of Heat Dissipation Structures Based on the Adaptive Feature-driven Method

SUN Yuxin, CAI Shouyu, ZHANG Xu, WANG Ke   

  1. School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001
  • Received:2023-08-11 Revised:2024-01-24 Online:2024-08-05 Published:2024-09-24

Abstract: Topology optimization technology has become an effective design method for high-performance heat dissipation structures. The typical optimization results of heat dissipation structures often show the characteristics of many small features and complex topology configurations. However, the traditional topology optimization method has great difficulties in the model reconstruction of the small features of the heat dissipation structure because the design results are difficult to be accurately imported into the CAD system and/or the resulting boundary is not clear and smooth;New topology optimization methods, such as feature-driven method and moving morphable components method, which can seamlessly connect with the CAD system, are difficult to be used to design heat dissipation structure with complex topology configuration because of their initial layout dependence.In view of this, with the help of the hierarchical growth technology of the tree branch structure of the bionic topology optimization method, a new adaptive feature-driven method is developed to provide a reasonable initial layout for the feature-driven optimization of the heat dissipation structure.In order to enlarge the design space as much as possible to obtain better results, two B-spline functions are used to construct bendable features with sufficient deformation ability;In order to reflect the hierarchical relationship of the bionic tree branch structure in the optimization process, the starting point of the branch feature is directly defined in the parameter domain of the main branch feature based on the mapping idea.The topology optimization of the heat dissipation structure under different boundary conditions is carried out with the optimization goal of minimizing the thermal compliance and the given volume fraction of high thermal conductivity material as the constraint.Numerical examples show that the proposed adaptive feature-driven method can obtain the design results of heat dissipation structures with clear and smooth boundaries and excellent performance using relatively few design variables.

Key words: topology optimization, heat dissipation structure, feature-driven method, bionic design, self-adaption

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