Design and optimization method of three-dimensional porous heat dissipation structure based on three-period minimum curved surface

Abstract

The invention discloses a design and optimization method of a three-dimensional porous heat dissipation structure based on a three-period minimum curved surface, and belongs to the field of computer aided design. Firstly, a porous structure is established through implicit function representation of a three-period minimal curved surface; secondly, according to a steady-state heat conduction equation, a heat dissipation problem is converted into a heat dissipation weakness minimization problem under a given constraint condition; then, a parameter function is directly solved by utilizing a global-local interpolation method; finally, period optimization and wall thickness optimization are conducted on the modeling problem, and the optimized porous sheath-shaped structure with the smooth periodand wall thickness changes is obtained. Due to the porous structure, the heat dissipation performance, the heat conduction efficiency and the heat conduction efficiency are greatly improved. The porous structure designed by the invention has the characteristics of smoothness, full connectivity, controllability, quasi-self-supporting property and the like, the applicability and the manufacturability of the structure are ensured due to the characteristics, the porous structure is suitable for a 3D printing manufacturing method, an internal structure in the printing process does not need to be additionally supported, and the printing time and printing materials are saved.

Description

technical field [0001] The invention belongs to the field of engineering design and manufacture, and relates to a three-dimensional porous heat dissipation structure design and optimization method, which is applicable to heat dissipation structures of various large-scale engineering machinery, radiators such as automobiles, and related components of burning appliances. Background technique [0002] How to construct lightweight and efficient heat dissipation structures has received extensive attention in various engineering fields. Traditional heat sink structures cannot achieve high heat conduction efficiency. The thermal conductivity of the structure can be effectively improved through the study of the porous structure, however, the representation and optimization methods become the technical bottleneck restricting its further development. [0003] The traditional heat dissipation structure design, relying on the basic theory and practical experience of thermal science, is...

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Problems solved by technology

Porous structures based on three-period minimal surfaces (especially for large and complex porous structures) are very time-consuming and memory-intensive to represent with polyhedral meshes (tetrahedron or hexahedron), and traditional finite element-based porous structure processing The methods are almost all heuristic, and there is no effective optimization. Therefore, the research on the heat dissipation of porous structures based on three-period minimal surfaces is less

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