摘要
对于在提高某乘用车白车身整体静动态性能的研究,提出了相对灵敏度和建立优化数学模型结合的分析方法;利用Hyper Mesh软件建立某乘用车白车身高质量高精度的有限元模型,用以确定白车身的性能参数;利用相对灵敏度法筛选出对实现车身性能影响较大的结构件,通过选定这些结构件为设计变量,设置车身静动态性能为约束条件,白车身质量最小为优化目标进行优化。多次迭代得到结构件合理的厚度值,此方法一定程度上提升了白车身的动静态性能,且实现了白车身质量部分减轻目标。已经成功地应用于车企的车身优化项目中,为车身轻量化研究提供了一定的参考价值。
In order to improve the overall static and dynamic performance of a passenger car,the relative sensitivity and the analysis method of the optimization mathematical model are put forward. The finite element model of high quality and high precision was established in Hyper Mesh software according to the vehicle body parameters,in order to determine the performance parameters of the body in white（ BIW）. Based on the influence of BIW body structure stiffness and modal,the structure elements which influence the performance of the vehicle body are found to be the optimal design variables according to the relative sensitivity method. In order to optimize the vehicle body,the stiffness and modal frequency were used as constraints for the objective function which was established by the minimum body weight.The reasonable thickness value of the structure is obtained by iteration. The method can improve the dynamic and static performance of the BIW to a certain extent,and realize the weight of the BIW part. It has been successfully applied in the vehicle body optimization project,which provides a certain reference value for the lightweight research of the vehicle body.
出处
《北京信息科技大学学报（自然科学版）》
2016年第4期55-61,共7页
Journal of Beijing Information Science and Technology University
基金
北京市属高等学校高层次人才引进与培养计划(CIT&TCD20130328)
北京市教委科研基地建设项目(PXM2014_014224_000065)
关键词
白车身
模态
刚度
有限元分析
BIW
modal
stiffness
finite element analysis
