点阵结构单元力学性能及在结构轻量化设计中的应用
Mechanical performance of lattice structure units and its application in lightweight design of structures
申会鹏 1张天宇 2李行雨 2韩春阳 2郭家宝2
作者信息
- 1. 河南工业大学 机电工程学院,河南 郑州 450001;河南省超硬磨料磨削装备重点实验室,河南 郑州 450001
- 2. 河南工业大学 机电工程学院,河南 郑州 450001
- 折叠
摘要
针对特定功能点阵结构实现结构轻量化设计的问题,利用拓扑优化方法,构建了点阵结构单元构型.首先,从实际载荷工况特征出发,构建了初始设计模型,根据拓扑优化思想,设计出了符合力学性能特性的创新点阵结构单元谱;其次,采用有限元分析方法,获取了点阵结构单元的力学性能,提出了以比刚度为指标的单元性能评价方法,得到了点阵结构的力学性能规律;然后,建立了典型点阵结构单元比例试件,进行了力学实验分析,通过实验数据对比,对点阵结构单元性能规律的准确性进行了验证;最后,将点阵结构性能规律应用于汽车发动机连杆的结构轻量化设计中,通过分析汽车发动机连杆的载荷特征来匹配点阵结构单元谱,填充了相应的点阵结构.研究结果表明:填充后的连杆体积减少了 45%,而比刚度提高了 90%,验证了点阵结构单元数据库的有效性和实用性.该点阵结构单元数据库能够为复杂零件的结构轻量化设计提供有力的科学依据.
Abstract
Aiming at the problem of designing a specific function of the lattice structure to achieve structural lightweight design,the configuration of lattice structure element was innovated by the method of topology optimization.Firstly,starting from the characteristics of actual load conditions,the initial design model was constructed,the topological optimization idea was used to innovate the lattice structure element spectrum that conformed to the mechanical properties.The mechanical performance of the lattice structure units was obtained through finite element analysis,and a unit performance evaluation method based on specific stiffness was proposed,the law of the mechanical properties of the lattice structure was obtained.Then,a typical lattice structure element proportion specimens was constructed,and the mechanical experimental analysis was carried out.The accuracy of the lattice structure element performance was verified by comparing the experimental data.Finally,the lattice structure performance law was applied to the lightweight design of automobile engine connecting rod structure.By analyzing the load characteristics of the connecting rod of the automobile engine,the lattice structure element spectra were matched,and the corresponding lattice structures were filled.The research results show that the volume of the filled connecting rod is reduced by 45%,while the specific stiffness is improved by 90%,the effectiveness and practicability of the lattice structure unit database are verified.The database of lattice structural elements established in this study can provide a powerful scientific basis for structural lightweight design of complex parts.
关键词
点阵结构/力学性能/数值模拟/实验测试/轻量化设计Key words
lattice structure/mechanical performance/numerical simulation/experimental testing/lightweight design引用本文复制引用
基金项目
河南省高等学校青年骨干教师培养计划项目(2023GGJS060)
河南工业大学青年骨干教师培育计划项目(2022-0503/21420191)
辽宁省"揭榜挂帅"科技攻关专项(2021JH1/10400099)
出版年
2024
NETL
NSTL
万方数据