基于应力驱动的单元网格构型自动匹配研究
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摘要
结构体轻量化设计过程中,一种新的研究方法是基于结构体内部不同区域所受不同应力选择不同强度极限的单元网格构型进行填充,人工进行筛选填充比较复杂。提出一种基于UG二次开发的单元网格构型自动匹配填充方法。选择合适的结构体进行简化建模,以有限元分析为基础,对其进行受力分析得出结构体受力状态下的三维空间应力值数据库,选择不同类型的单元网格构型,结合C++程序语言设计,运用UG二次开发功能,实现单元网格构型和结构体三维空间应力的自动匹配,最终实现结构体的轻量化设计。最后通过对车门外把手进行基于应力自动匹配设计,对设计方法进行了验证,证明了上述方法的准确性与实用性。
In the process of designing structure lightweight, this article puts forward a method to automatically match and fill lattice structure based on the UG secondary development. Firstly, we selected suitable structs to simplify the modeling. Based on the finite element analysis, the force analysis was conducted, and the three-dimensional spatial stress database under stress state of structure was obtained. Moreover, we chose different lattice structures. Combined with C + + programming language, we used the UG secondary development function to realize the automatic matching between three-dimensional spatial stress of struct and lattice structure. Finally, the lightweight design of struct was realized. Through the automatic matching design of vehicle door handle based on stress, the design method was verified. Thus, the accuracy and practicability of proposed method is proved.
In the process of designing structure lightweight, this article puts forward a method to automatically match and fill lattice structure based on the UG secondary development. Firstly, we selected suitable structs to simplify the modeling. Based on the finite element analysis, the force analysis was conducted, and the three-dimensional spatial stress database under stress state of structure was obtained. Moreover, we chose different lattice structures. Combined with C + + programming language, we used the UG secondary development function to realize the automatic matching between three-dimensional spatial stress of struct and lattice structure. Finally, the lightweight design of struct was realized. Through the automatic matching design of vehicle door handle based on stress, the design method was verified. Thus, the accuracy and practicability of proposed method is proved.
引文
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[11] Y Chen.3D Texture Mapping for Rapid Manufacturing[J].Computer-Aided Design and Applications,2007,4(4):761-771.
[12] 朱仕魁,等.轻量化设计中的单元网格构型研究[J].塑料工业,2017,45(3):151-156.
[13] 张胜兰,徐潇寒.基于HyperWorks的车门外把手拓扑优化设计[J].湖北汽车工业学院学报,2012,26(4):10-12.
[2] E A Starke,J T Staley.24–Application of modern aluminium alloys to aircraft[J].Fundamentals of Aluminium Metallurgy,2011:747-783.
[3] 谢冬宁.新型材料在汽车轻量化中的应用[J].黑龙江科技信息,2016,(32):166-166.
[4] J P Immarigeon,et al.Lightweight materials for aircraft applications[J].Materials Characterization,1995,35(1):41-67.
[5] 赵岭,等.机床结构件轻量化设计的研究现状与进展[J].机床与液压,2012,40(15):145-147.
[6] R S Semken,et al.Lightweight stator structure for a large diameter direct-drive permanent magnet synchronous generator intended for wind turbines[J].Renewable Power Generation Iet,2015,9(7):711-719.
[7] S K Moon,et al.Application of 3D printing technology for designing light-weight unmanned aerial vehicle wing structures[J].International Journal of Precision Engineering and Manufacturing-Green Technology,2014,1(3):223-228.
[8] X Zhang,et al.Medial axis tree an internal supporting structure for 3D printing[J].Computer Aided Geometric Design,2015,s 35–36(C):149-162.
[9] C Schroeder,et al.Computer-aided design of porous artifacts[J].Computer-Aided Design,2005,37(3):339-353.
[10] D Li,et al.Interior structural optimization based on the density-variable shape modeling of 3D printed objects[J].The International Journal of Advanced Manufacturing Technology,2016,83(9):1627-1635.
[11] Y Chen.3D Texture Mapping for Rapid Manufacturing[J].Computer-Aided Design and Applications,2007,4(4):761-771.
[12] 朱仕魁,等.轻量化设计中的单元网格构型研究[J].塑料工业,2017,45(3):151-156.
[13] 张胜兰,徐潇寒.基于HyperWorks的车门外把手拓扑优化设计[J].湖北汽车工业学院学报,2012,26(4):10-12.