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基于一维混合元胞自动机模型的汽车变厚度B 柱设计

罗 欣1， 段利斌2 ，陈 涛1*， 杜展鹏1   

  1. （1. 湖南大学 汽车车身先进设计制造国家重点实验室，长沙 410082，中国；2. 江苏大学 汽车与交通工程学院，镇江 212013，中国）
  • 收稿日期:2018-03-10 出版日期:2018-06-30 发布日期:2018-07-04
  • 通讯作者: 陈涛 (1978—)，副教授。E_mail: chentaohndx@gmail.com。
  • 作者简介:第一作者 / First author ： 罗欣 (1994—)，男 ( 汉)，湖南，硕士研究生。E_mail: luoxin_hnu@163.com。
  • 基金资助:

    湖南省自然科学基金（2017JJ3030）；广西科技攻关计划（桂攻科1598008-18）。

Design of automobile tailor rolled blank B-pillar based on one dimension hybrid cellular automata model

LUO Xin1, DUAN Libin2, CHEN Tao1*，DU Zhangpeng1   

  1. (1. Hunan University, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 410082, China; 2. Jiangsu University Automotive and Transportation Engineering School, Zhenjiang 212013, China)
  • Received:2018-03-10 Online:2018-06-30 Published:2018-07-04

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摘要：

      为了将连续变厚度轧制工艺更好地应用于车身轻量化设计和耐撞性设计，针对连续变厚度轧制（TRB） B 柱不同区域厚度分布的设计问题，提出一维混合元胞自动机(ODHCA) 模型。建立变厚度B 柱的ODHCA 模型，提取元胞厚度作为设计变量，确定其局部更新规则；根据连续变厚度轧制工艺的特点定义设计区域的约束条件，确定ODHCA 方法的迭代方式与收敛准则。结果表明：应用ODHCA 方法，在等质量情况下，胸部、腹部、骨盆位置侵入量分别降低了8.8%、13.4%、14.6%；而在质量降低14.2%时，上述各部位的位置侵入量分别降低了5.8%、9.6%、10.3%。因而，该方法可以改善B 柱的变形模式，提高侧面碰撞安全性能，并满足轻量化要求。

关键词: 汽车被动安全 ,  耐撞性 ,  轻量化 , 连续变厚度轧制(TRB)B 柱 ,  一维混合元胞自动机方法（ODHCA）

Abstract:

Abstract: A one dimension hybrid cellular automata (ODHCA) model, which can handle the optimization problem of thickness distribution in different area of the tailor rolled blanks (TRB) B-pillar, was proposed to effectively apply the tailor rolled blank into the lightweight design and the crashworthiness design of the vehicle body. The ODHCA model was established and the TRB B-pillar was divided into several one dimensional cells along the rolling direction; the thicknesses of the cells were extracted as the design variables and the local update rules were determined. The thickness distribution constraint function of the design region was defined. The iterative method and convergence criterion of ODHCA was determined according to the characteristics of flexible rolling process. The results show that the intrusion of the thorax, abdomen, and pelvis is reduced by 8.8%, 13.4%, and 14.6% respectively in the case of equal mass; while the mass is reduced by 14.2%, those of the above body parts is reduced by 5.8%, 9.6%, and 10.3% respectively. Therefore the method can improve the deformation mode of the B-pillar and the side crashworthiness performance, leading to meet the lightweight requirements.

Key words: automotive passive safety , crashworthiness ,  lightweight , tailor rolled blanks (TRB) B-pillar , one dimension hybrid cellular automata (ODHCA)