白车身中通道地板抗凹性能优化及影响因素研究

Optimization and Study on Influence Factors for Dent Performance of Aisle Floor in White Body

针对某白车身中通道地板存在的抗凹问题,建立有限元模型并计算;通过计算得到地板抗凹性能指标数值;并将试验结果和有限元模型计算结果进行对比,两者有较好的一致性,有限元分析方法有效;用正交试验搜寻地板最优抗凹性能参数组合,以横向加强筋深度、材料牌号和钣金厚度为研究因素,每个因素设计3个水平,建立正交表L_(9)(3^(4))并完成9组有限元模型计算;对分析结果进行方差和极差分析,得到各因素水平对地板各抗凹性能指标影响,最终得到最优参数组合。本文研究结果为中通道地板抗凹性能设计提供参考依据,对工程应用有较大意义。

The finite element model for dent performance of aisle floor in white body was established according to the practical problem.The index of dent performance of aisle floor was obtained according to the calculated result.The results of experiment and finite element analysis method were compared.The comparison results show that they have good consistency.The method of finite element analysis is effective.In order to obtain the optimized parameter combination for dent performance of aisle floor,orthogonal test was established.The research factors were depth of transverse stiffener,material designation and thickness.Each factor was designed in three levels.An orthogonal table L_(9)(3^(4))was built and 9 groups of finite element analysis model were conducted.The analysis results were processed by the variance and range analysis,and the influence of each factor and level for each dent performance index of aisle floor were gained.The optimized parameter combinations are confirmed finally.Design references for dent performance of aisle floor are provided,and it has significance in application.