Stiffness Analysis of Miniature Electric Commercial Vehicle Frame Based on Lightweight Aluminum Alloy 7475 Material

4th International Conference on Energy Equipment Science and Engineering

Daliang, Chen^1 ; Haijun, Zhao^1^2 ; Weichong, Zhu^3 ; Zhiwei, Guan^2 ; Xinbo, Chen^4 ; Cansong, Gu^1 ; Haiyang, Wang^1 ; Naibin, Zhai^2

Automotive Engineering Research Institute, China Automotive Technology and Research Centre Co. Ltd, Tianjin

300300, China^1

Natl. Jt. Eng. Res. Centre of Intelligent Vehicle Infrastructure Cooperation and Safety Technology, Tianjin University of Technology and Education, Tianjin

300222, China^2

Anyang Research Institute of New Energy Automobile, Henan Derry New Energy Automobile Co. Ltd, Anyang

455000, China^3

China North Vehicle Research Institute, Beijing

100072, China^4

关键词: Aluminum alloy 7475;    Aluminum alloy materials;    Ansys workbenches;    Bending stiffness;    Light-weight constructions;    Mode frequencies;    Stiffness analysis;    Torsional stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/3/032044/pdf
DOI  :  10.1088/1755-1315/242/3/032044

来源: IOP

【 摘 要 】

As the performance of aluminum alloy material is close to that of steel and the density is much smaller than that of steel, it is widely used in vehicle lightweight construction. In this paper, aluminum alloy 7475 material is applied to the frame of micro-electric commercial vehicle, and the frame model is adopted by Ansys Workbench software to perform finite element analysis of mode analysis, topology optimization, bending stiffness and torsional stiffness. The results show that compared with the steel frame, the mode frequency slightly increases, and the change rate does not exceed 0.5%, and the weight decreases by 64.6%. After topology optimization, the beam reduces the excess material and optimizes the layout, and the frame weight is further reduced by 13%. The bending stiffness and torsional stiffness have reached the pre-design goals, which exceed the target value by 0.9% and 4.72% respectively. A basis is provided for structural optimization and vehicle lightweight.