锻压技术

专用汽车底盘零件轻量化设计与优化

英文标题：Lightweight design and optimization of chassis parts in special purpose vehicle

作者：王野岳峰丽徐勇张士宏张海霞焦丙林

分类号：U272.6

出版年,卷(期):页码：2015,40(12):150-154

摘要：

对专用车轻量化设计的重要性进行了分析，介绍了目前汽车轻量化的主要途径，针对专用汽车底盘横梁零件开展了包括材料和结构在内的轻量化设计。选用22MnB5高强钢和现役Q345碳钢两种材料，对横梁零件的受力情况进行理论分析，采用有限元仿真技术对横梁零件的尺寸和结构进行优化，综合应用CATIA、Hypermesh和MSC Marc 3种软件的优势完成几何建模、网格划分、计算分析和结果处理的整个过程，提高有限元分析的效率。结果表明，现役U型带孔结构横梁易产生应力集中倾向，使零件过早达到屈服，而采用高强钢W型结构横梁不仅安全性显著提高，而且重量比现役零件减少约69%，轻量化效果显著。

The importance of lightweight design for the special purpose vehicle was analyzed, and the main ways of automobile lightweight were introduced. For the chassis crossbeam of special purpose vehicle, the lightweight design including material and structure was carried out. The force distribution of chassis crossbeams produced by high strength steel 22MnB5 and current carbon steel Q345 was theoretically analyzed respectively. The size and structure of the chassis crossbeam were optimized by the FEM simulation technology. The whole process consisting of the geometry modeling, mesh partition, calculation analysis and post processing was realized by comprehensive application of CATIA, Hypermesh and MSC Marc softwares. Therefore, the analysis efficiency was improved greatly. Results show that the current U-shape chassis crossbeam with holes leads to stress concentration, which is prone to make the parts yield early. However the W shape chassis crossbeam has high security and a remarkable lightweight to 69% of part weight.

基金项目：

国家自然科学基金资助项目（51304186）；河南省中科院科技成果转移转化项目（2014305）

作者简介：王野（1990-），男，硕士研究生通讯作者：徐勇（1983-），男，博士，助理研究员 E-mail: yxu@imr.ac.cn

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