3D model multi-scale lightweight method and system based on topology optimization

Abstract

The application provides a kind of 3D model multi-scale light-weight method and system based on topology optimization, it is related to model light-weight technical field, including grid division to target 3D model, generate finite element model;Establish multi-scale topology optimization model, adjust density distribution through density filtering function, combined with minimum size constraint and gray gradual projection processing, obtain macro light-weight structure;Based on macro light-weight structure, obtain skeleton structure, based on adaptive polygon segmentation rule, construct porous filling unit, fuse multi-parameter model, establish the parameterized representation method of three variables of density, size and shape, obtain intermediate scale structure through multi-objective genetic algorithm, combined with sensitivity analysis technology;The intermediate scale structure is embedded in macro light-weight structure, combined with cascade optimization, generate multi-scale structure, calculate equivalent material properties using homogenization method, iteratively adjust model parameters, finally obtain multi-scale light-weight result.

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