• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (8): 65-72.doi: 10.3901/JME.2019.08.065

• 材料科学与工程 • 上一篇    下一篇

基于拓扑优化的变密度点阵结构体优化设计方法

廖中源1, 王英俊1, 王书亭2   

  1. 1. 华南理工大学机械与汽车工程学院聚合物新型成型装备国家工程研究中心 广州 510641;
    2. 华中科技大学机械科学与工程学院 武汉 430074
  • 收稿日期:2018-07-02 修回日期:2018-12-06 出版日期:2019-04-20 发布日期:2019-04-20
  • 通讯作者: 王英俊(通信作者),男,1984年出生,博士,副教授,硕士研究生导师。主要研究方向为拓扑优化,多功能点阵材料设计,有限元法,等几何分析。E-mail:wangyj84@scut.edu.cn
  • 作者简介:廖中源,男,1995年出生。主要研究方向为拓扑优化,多功能点阵材料设计。E-mail:liaozyuan@foxmail.com;王书亭,男,1968年出生,博士,教授,博士研究生导师。主要研究方向为复杂机电装备数字化设计,结构拓扑优化技术。E-mail:wangst@hust.edu.cn
  • 基金资助:
    国家自然科学基金(51705158,51675197)和中央高校基本科研业务费专项(2018MS45)资助项目。

Graded-density Lattice Structure Optimization Design Based on Topology Optimization

LIAO Zhongyuan1, WANG Yingjun1, WANG Shuting2   

  1. l. National Engineering Research Center of Novel Equipment for Polymer Processing, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641;
    2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
  • Received:2018-07-02 Revised:2018-12-06 Online:2019-04-20 Published:2019-04-20

摘要: 点阵材料是一种超轻高强的高性能多孔材料,目前主要以等密度构建点阵结构体。在实际情况下,点阵材料的各部分承受着不同的载荷,等密度点阵材料存在性能不能充分发挥的问题。针对上述问题,将拓扑优化引入点阵材料设计中,提出一种基于均匀化方法的多尺度拓扑优化方法,实现了变密度点阵结构体的优化设计,可根据实际载荷设计出最优的变密度点阵结构体,以达到最优性能。以汽车连杆为例,与现有商业软件HyperWorks采用的梁模型点阵优化方法进行对比验证。结果表明,所提出方法优化所得连杆的轻量化效果更好,应力分布更合理。该方法生成的变密度点阵结构有着更优异的性能,更适合变密度点阵结构体的优化设计。

关键词: 3D打印, 变密度, 点阵结构, 拓扑优化, 有限元分析

Abstract: Lattice material is an ultra-light, high-strength, high-performance porous material. At present, the lattice structure is mainly constructed with uniform density. Different parts made of the lattice material are subjected to different loads, which results in a problem that the optimal performance of the lattice material with uniform density cannot be fully achieved. In view of the above problems, a multiscale topology optimization method based on homogenization method is proposed, which realizes the graded-density lattice structure, and the optimal graded-density lattice structure can be obtained according to the actual load to achieve optimal performance. Taking the automobile connecting rod as an example, comparing with the method of beam-model-based lattice optimization from the commercial software HyperWorks, the proposed method has better performance on mass reduction and the stress distribution. Therefore, the method obtains a better-property design, which is more suitable for the optimal design of graded-density lattice structures.

Key words: 3D printing, FEA, graded-density, lattice structure, topology optimization

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