侧面碰撞子结构模型精度的参数研究  

Parametric Research on Accuracy of Side Impact Substructure Model

作　　者：刘正午 郝琪 梅佳炜 王兴东 田立胜 Liu Zhengwu;Hao Qi;Mei Jiawei;Wang Xingdong;Tian Lisheng(School of Automotive Engineering,Hubei University of Automotive Technology,Shiyan 442002,China;Dongfeng(Shiyan)Body Parts Co.Ltd,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002 [2]东风(十堰)车身部件有限公司,湖北十堰442002

出　　处：《湖北汽车工业学院学报》2022年第4期1-6,共6页Journal of Hubei University Of Automotive Technology

基　　金：国家自然科学基金(11502075);湖北省重点实验室创新基金(2015XTZX0418)。

摘　　要：以提高侧面碰撞仿真计算效率为目的,根据模型降阶原理与某微型电动汽车的侧面碰撞参数,实现子结构关键建模参数提取,推导出侧面碰撞下子结构模型边界条件的最优加载区域。为研究不同加载区域对子结构模型精度的影响,对比不同加载区域方案的车身变形、位移时间曲线以及B柱加速度曲线。研究表明:子模型边界加载区必须选定碰撞的主要接触变形区域;当计算成本为次要因素时,模型边界条件区域占比越高,加速度曲线运动趋势更加稳定。建立的侧碰子结构模型B柱加速度最大峰值误差仅为3.63%,加速度曲线的运动趋势与整车模型的曲线运动趋势吻合,计算时间缩短,证明了该简化方法的有效性。In order to improve the computational efficiency of side impact simulation,according to the principle of model order reduction and the side impact parameters of a micro electric vehicle,the key modeling parameters of the substructure were extracted,and the optimal loading region of the boundary conditions of the substructure model of side impact was derived.The body deformation,displacement time curves and B-pillar acceleration curves of different loading region schemes were compared to study the influence of different loading regions on the accuracy of the substructure model.The study shows that the sub-model boundary loading area must be selected as the main contact deformation region of the collision.Cosidering costing as the secondary factor,the higher the proportion of boundary conditions of model,the more stable the movement trend of acceleration curve is.The maximum peak acceleration error of the B-pillar of the established substructure of side impact is only 3.63%.And the movement trend of acceleration curve coincides with the whole vehicle model.The calculation time is greatly shortened,which proves the validity of this simplified method.

关 键 词：模型降阶 子结构模型 边界条件 加载区域 车身变形 B柱加速度 

分 类 号：U467.14[机械工程—车辆工程]