• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2017, Vol. 53 ›› Issue (12): 102-109.doi: 10.3901/JME.2017.12.102

• 第三代高强钢汽车板 • 上一篇    下一篇

扫码分享

基于侧碰的梯度性能热成形B柱抗撞性能优化

盈亮1, 张富博1, 戴明华2, 胡平1   

  1. 1. 大连理工大学汽车工程学院 大连 116024；
    2. 大连理工大学机械工程学院 大连 116024
  • 出版日期:2017-06-20 发布日期:2017-06-20
  • 作者简介:

    盈亮，男，1983年出生，博士，讲师。主要研究方向为车身结构安全仿真及高强度钢板热冲压技术。

    E-mail：yingliang@dlut.edu.cn

    胡平(通信作者)，男，1956年出生，博士，教授，博士研究生导师。主要研究方向为汽车车身工程和固体力学。

    E-mail：pinghu@dlut.edu.cn

  • 基金资助:
    * 国家自然科学基金(11202128)、中国博士后科学基金(2014M561223)和中央高校基本科研业务费专项资金(DUT16RC(4)28)资助项目; 20160613收到初稿，20161211收到修改稿;

Optimization of Crashworthiness for Tailored Hot Forming B-pillar Based on Side Impact

YING Liang1, ZHANG Fubo1, DAI Minghua2, HU Ping1   

  1. 1. School of Automotive Engineering， Dalian University of Technology， Dalian 116024;
    2. School of Mechanical Engineering， Dalian University of Technology， Dalian 116024
  • Online:2017-06-20 Published:2017-06-20

PDF

250

摘要：

基于动力显式有限元算法，以侧碰过程中B柱的吸能量-EA和最大侵入量Dmax为评价指标，对比分析热成形强度梯度分布及厚度梯度分布对零件抗撞性能的影响。进一步，基于径向基函数建立梯度性能热成形B柱的侧碰代理模型，并采用NSGAII遗传算法分别对两种梯度性能B柱(强度、厚度)进行多目标优化设计，获得了梯度性能热成形B柱帕朗特前沿解集。结果表明：优化后的梯度强度及梯度厚度热成形B柱的抗撞性能相较于原始工况有显著提高，且梯度厚度B柱比梯度强度B柱具有更大的可设计空间，结合多目标优化结果可进一步提高车身零部件的综合抗撞性能。

关键词: 多目标优化, 径向基模型, 抗撞性, 梯度性能, 热成形

Abstract:

The crashworthiness of B-pillar with tailored properties in vehicle side impact is researched based on dynamic explicit finite element method by taking the energy absorption and maximum intrusion of B-pillar as evaluation index. The effect of gradient strength distribution and gradient thickness distribution against collision performance is analyzed and their performance is compared to uniform strength B-pillar. In addition, radial basis function is applied to build the surrogate model of B-pillar and by which the multi-objective optimization design of B-pillar with tailored properties is carried out then. The results show that the performance of B-pillar with tailored properties are improved remarkably after optimization design, which proves that multi-objective optimization can further improve the comprehensive collision performance of vehicle structure.

Key words: crashworthiness, multi-objective optimization, radial basis function, tailored properties, hot forming

版权所有 © 2019 《机械工程学报》编辑部 | 京ICP备05055788号-30