微型客车侧碰安全性与B柱厚度影响关系研究

摘要

以某微型客车为研究对象,综合考虑结构轻量化要求,分析了B柱厚度对汽车侧碰安全性的影响规律.通过对B柱变形理论进行分析,确定B柱厚度为主要研究因素.利用Hypermesh和Ls-dyna建立仿真分析模型,研究了侧碰安全性与B柱厚度之间的影响关系.结果表明,B柱厚度的选取对汽车侧面耐撞性和吸能特性的影响较大,随着B柱厚度的增加,汽车侧面耐撞性能明显提高;当厚度增加到一定程度后,侧面耐撞性能出现下降趋势.综合考虑轻量化要求,提出了B柱厚度优化改进方案.%Taking a mini bus as the research object and considering the requirement of lightweight structure, this paper analyzes the influence rule of the thickness of B column on the side impact safety of automobile.By analyzing the deformation theory of B column, B column thickness is considered as the main research factor.The simulation analysis model is established by Hypermesh and Ls-dyna, and the relationship between the side impact safety and the thickness of B column is studied.Results show that the thickness of B column has a great impact on side impact resistance and energy absorption characteristics of the automobile.With the increase of the thickness of the B column, the automobile side impact performance improves significantly.However, when the thickness increases to a certain degree, the side impact resistance has a trend of declining.Considering the requirement of lightweight, the improvement scheme of B column thickness is put forward.