某折叠代步车踏板支架的拓扑优化设计研究

Research on topology optimization design of a folding scooter pedal bracket

针对折叠代步车踏板支架轻量化需求,本文介绍了踏板支架拓扑优化与3D打印设计制造一体化的流程与方法。通过OptiStruct软件对折叠车踏板支架进行静强度分析,并运用inspire拓扑软件对设计空间进行拓扑优化求解,以设计空间30%为目标,得到基于加权刚度最大化的设计方案,经过有限元分析软件进行仿真分析之后调整优化设计模型;进行静强度加载,验证踏板支架的承载能力。初始踏板支架质量为5 874.8 g,优化后踏板支架质量为2 520.8 g,减重57.1%。采用拓扑优化与3D打印结合的设计方法可以快速获得轻量化且力学性能符合设计需求的设计成品,有效提升产品设计开发效率。

Aiming at the lightweight requirements of the folding scooter pedal bracket,this paper introduces the process and method of the integration of pedal bracket topology optimi-zation and 3D printing design and manufacturing.The static strength analysis of the folding scooter pedal bracket is carried out by OptiStruct and the topology optimization of the design space is solved by using the inspire topology software.When the design objective is set as 30%of the design space,a design scheme based on weighted stiffness maximization is ob-tained.The optimization design model is adjusted after simulation analysis with the finite ele-ment analysis software.The static strength loading is carried out to verify the bearing capaci-ty of the pedal bracket.The mass of the initial pedal bracket is 5874.8 g,while the mass of the optimized pedal bracket is 2520.8 g,which is reduced by 57.1%.Through the design method of topology optimization combined with 3D printing,the lightweight design products with mechanical properties that meet the design requirements can be quickly obtained,and the efficiency of product design and development can be effectively improved.