Continuum surface lightweighting method based on finite element result

Abstract

The invention discloses a continuum surface lightweighting method based on a finite element result, and belongs to the technical field of structural optimization. The method comprises the following steps: performing mesh generation on a demand surface, and applying a demand boundary condition to perform mechanical calculation; performing block subdivision on a design region according to a surface shape, and establishing a corresponding relation between blocks and finite element computing elements; making statistics of unit result distribution in the blocks according to an finite element computing result in the blocks, and establishing a poriform surface comprising lattices with different sizes. According to the method, the distribution of structural grid density is driven through a finite element simulation result, curved surface essential data is segmented and reconstructed, the method focuses on the visual feedback of the finite element result, large-scale iterative trial during topological optimization is avoided by controlling the random reticular density to be associated with the finite element result, the shape forming of a structure is quickened, the lightweighting generation process of a surface structure is simplified, and the method is particularly suitable for material additive manufacturing.

Description

technical field [0001] The present invention relates to a product structure optimization method, more specifically, to a continuum surface lightweight method based on finite element results, which simplifies the lightweight generation process of surface-like structures and is very suitable for additive manufacturing. Background technique [0002] The application of additive manufacturing technology began in the 1980s, covering the fields of product development, data visualization, rapid prototyping and special product manufacturing. In the 1990s, the application of incremental manufacturing technology in the field of production (batch production, mass production and distributed manufacturing) has been further developed. In the early 21st century, incremental production also reached an unprecedented scale in the field of metal processing for industrial production for the first time. At the beginning of the 21st century, the sales volume of incremental manufacturing-related e...

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Problems solved by technology

[0006] Because the optimization results of traditional topology optimization are relatively single, showing typical mechanical streamlines and characteristics, it can meet the requirements of industry and engineering in most cases, but for medical protective gear, etc., which are less stressed and have higher rigidity requirements, both For products with aesthetic requirements, traditional topology optimization techniques are difficult to obtain better optimization results

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